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PPSU LSG artificial knee joint components

PPSU injection molding

PPSU LSG artificial knee joint components.

Advanced knee injuries or arthritis cause knee tissue damage, inflammation and terrifying pain. These conditions can disable you from flexing or extending your knees. As time proceeds, the damage on your knee joint and knee tissue can make it challenging to perform day to day activities. Knee joints damage can inhibit you from sitting or lying down. This calls for a knee replacement surgery to replace knee joints. One of the available artificial knee joint components is PPSU LSG.

PPSU, a plastics for medical plastic parts, is basically an abbreviation for polyphenylsulfone which is an amorphous high-performance thermoplastic. The medical grade PPSU is bone white in color and thus suitable for knee implant design. This material is used to manufacture artificial knee joint spacer components. LSG is also an abbreviation. It refers to laparoscopic sleeve gastrectomy, a bariatric procedure which involves removing outer margins of an organ leaving a sleeve. This is a procedure undertaken to replace your knee with an artificial joint.

When it comes to choosing an artificial knee joint for your knee problem, you have to choose right. PPSU LSG knee joint components should be your first choice. Crafted from sterilized PPSU polymers, these joints are available in various knee implants designs. These will fit perfectly with your knee. Their durability and high impact resistance will ensure a strong knee after the knee joint is replaced.

This material possesses unlimited steam sterilization capabilities. This makes its sterilization easy and with these artificial knee joint spacer components, you will never acquire a bacterial infection. This is essential as other artificial knee joints have been associated with bacterial infections. Instead of improving your knee problem, it worsens. This can be completely averted by choosing PPSU knee joint spacer components.

You may ask yourself the advantages of using PPSUinjection molding parts as an artificial knee joint spacer component. Ask no more. This product has myriad advantages. These include:

High resistance against high energy radiation: This product has a very good resistance against high energy radiation. This includes gamma and x-rays. This property makes it possible for one to undergo x-ray examination. This will be undertaken without fear of damaging the knee joint and the artificial knee joint adoption by the knee can be monitored. This guarantees your safety when you use this artificial joints.

High operating temperature: Medical grade implants have to be heavily sterilized. PPSU has a high operating temperature that is 180 degrees. This allows it to be sterilized easily by repetitive steam sterilization. This is possible without deforming these artificial knee joints or shrinking them.

Highly rigid over a range of temperatures: This material has high rigidity over a wide range of temperatures. It is therefore durable and provides better functionality as compared to other knee implants.

Compatible with body tissue. This is crucial for knee joints. This material will not prevent regeneration of your body’s tissue. It also has a smooth design and will not scrape off regenerating tissue.

Other advantages include very high impact strength. This is important to prevent breakage of the knee joint implants. Good chemical compatibility will reduce the wear and tear caused by chemicals during the manufacture of this product. Good electrical insulating properties is key in avoiding lightning and other charge related complications.

If you need PPSU injection molding parts for your medical devices, we recommend you go to our medical plastic parts area, If you need some PPUS LSG artificial knee joint spacer components, please contact with us, we have over 40 version of this components to meet every size requirement.

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China Mould

China mould

The important mould manufacturing industry—China mould

China mould companies are now facing heavy pressure because of the high competitiveness of injection moulding companies from India and Vietnam. The reason for the heavy pressure on the Chinese plastic injection moulding company is detailed below.

  • Many plastic injection mould companies are located in India and Vietnam, which will contribute to China’s share of the mould manufacturing market.
  • The inflation caused the Chinese mould companies to pay more material costs, such as for mould steel and other materials, especially copper, since the war. Additionally, this has resulted in a significant increase in salaries. From 2009 to 2011, the general salary increased by 40%, but it did not increase more each year.
  • Due to the global economic recession, many Chinese moulding companies have experienced reduced orders. Therefore, when any purchase order is required, they all compete with each other on the mould price, leading to a continuous decrease in the price. Meanwhile, they cannot guarantee the mould’s quality.

China Mold Maker is one of the most important mold makers in the world. China is home to different categories of moldmakers, and this usually presents a challenge to anyone looking for a mold maker in the country. Many first-time buyers are often amazed by the sheer availability of mold makers, but soon realize that they should have taken more time to select the most appropriate and suitable mold maker.

It is relatively simple to spot a trustworthy mold shop in most of the developed countries, such as the United Kingdom, America, or Japan. Of course, the price is very high, but the case is quite different in China. This is because the numerous mold makers in the country do not all make high-quality molds. Instead, many of these mold makers typically produce low-quality molds that primarily cater to the local market’s demands.

China Mould

The Advantages of China Mould

As above, we explained that China mould companies face pressure in making moulds, but to compare with India mould and Vietnam mould, China mould still has its advantages. Of course, these advantages are not as big as they were 10 years ago. But even today, many Indian companies are still buying Chinese moulds for their Indian plastic injection moulding mpanies.

A simple piece of information I got from one of my Indian clients (who works for a big plastic injection moulding company in India) is that Indians cannot make good quality plastic injection mould; when they have any small issues, they will hold on to the project and not do anything to solve the issue. On the other hand, Indian made injection moulds will have big issues with quality and lead time.

Here are some advantages of using China moulds:

If you are seeking plastic mold injections for your project, what is the most cost-effective option?  In terms of quality and lead time, a China mould will prove to be the most cost-effective option. Going to China to have a mold made may seem a little daunting at first, but as you read further in this article, you will understand why most people choose this option.  Here are a few reasons people buy injection molds from China:

China mould

The cost is lower than in the USA and Europe.

Production costs for a China mould manufacturer is much lower than ordering one in the USA or Europe. This is primarily due to the economic differences—specifically the lower labor costs in China.  This is not something to feel bad about, as it is fairly related to the cost of living and comparable to labor costs across many industries.

The quality is good.

Because China has such a large industrial landscape, they specialize in plastic molds and other industrial items.  You can choose from a number of Chinese mould factories, all of which have extensive experience in producing high-quality moulds.

Easy to arrange.

Using the internet, it is very easy to communicate directly with Chinese plastic mold manufacturers.  Because they are accustomed to dealing with the USA, you can easily find a representative who speaks English, and you can work with them back and forth until you are satisfied.

Customisation

China mould manufacturers can produce customised moulds according to your specific requirements, mold standard such DME, HASCO, and so on, this is ensuring that you get a mould that meets your exact needs.

Large production capacity

With a vast pool of skilled labour and state-of-the-art manufacturing facilities, China has a large production capacity for injection molds. This means they can produce molds in large quantities and deliver them quickly.

Wide range of materials

China mould manufacturers can produce moulds from a wide range of materials, including plastic, metal, and composite materials.

Considering everything mentioned above, if you’re considering hiring a China mould maker to help with your production-related tasks, you should take a few crucial factors into account to ensure a successful outcome. For example, clearly identify the specific goals you hope to achieve with the assistance of a reputable company. This can either be precision or any other important thing that stands to help improve your production activities. Precision ensures that the task at hand is completed precisely as instructed.

In addition to the aforementioned requirements, you must also seriously consider the demands of this highly competitive industrial sector. Once you take into account the new technological developments, punctuality plays a crucial role in ensuring a robust turnaround in your goods’ production. Simply put, the sooner you receive the requested plastic parts, the faster you can complete production, thereby achieving much-needed cost effectiveness.

You should also dedicate some time to familiarise yourself with all the relevant plastic mould services related to your production activities. Doing so will help you make the right decisions and start enjoying the benefits of global operations. The best place to do plastic injection tooling is in China; hence, you should keep that in mind when looking to collaborate with any China mould company. Assembly and finishing should be done later, in Mexico. Simply put, these recommendations take into serious consideration the basic requirements, which are cost efficiency and speed.

It is equally important to note that the best global company should have experience working with a variety of global clients. This is crucial, as it ensures the seamless delivery of all plastic moulds to any global location. In general, to succeed in manufacturing, you must follow emerging trends.

The next time you require plastic injection mould work, ensure that you exclusively partner with companies that possess a comprehensive understanding of global operations. This is important because it will also help make your global expansion plans much easier.

China Mould Maker

How to Source Moulds From A China Mould Manufacturer

The process is a lot easier than you may think. You can find China mould manufacturers online by searching or by looking for recommendations from other people. Then you can make contact and start negotiating terms. You can usually have your plans drawn up in the US and sent over for them to review, or you can work on them directly with the mould suppliers in China.

Here are some steps to sourcing mould from China:

  1. Determine your mould specifications: Determine the type of mould you need, including its size, material, and other specifications. You should also have an idea of your budget and production volume.
  2. Research and select potential China mould suppliers: Use online directories, trade fairs, referrals, online research, and industry associations to identify potential mould suppliers in China. Evaluate the suppliers based on their experience, reputation, and their ability to meet your specific requirements.
  3. Contact the Chinese mould makers: Reach out to the China mould makers and send them your specifications. Request quotes from each supplier and ask for samples, references, and certifications.
  4. Evaluate the quotes and samples: Evaluate the quotes and samples from each supplier and compare them against your budget and specifications. You should also consider factors such as the supplier’s lead time, payment terms, and quality control processes.
  5. Negotiate and finalise the contract: Once you have selected a supplier, negotiate the contract terms, including payment terms, lead time, and quality control. Ensure that the contract includes details such as the scope of work, specifications, and delivery dates.
  6. Monitor the production and quality control: Monitor the production process closely to ensure that the mould is being produced to your specifications. You can also hire a third-party quality control company to inspect the mould before shipment.
  7. Receive and inspect the mould: Once the mould is complete, receive it and inspect it carefully to ensure that it meets your specifications. Test the mould to ensure that it produces high-quality parts.

If it is a new project, you should always make some prototypes before going to order moulds. Once you are happy with the prototype, you can start to order mould and wait for your shipment to be delivered. Despite packing and shipping, the cost will be much lower than in the US or Europe.

Sincere Tech is one of the top 10 mould manufacturers in China. We offer custom plastic moulds and plastic injection moulding parts to the world. We have clients from Germany, Canada, America, Spain, Thailand, Lithuania, etc.

Are you looking for A professional and long partner China mold maker?

SINCERE TECH is one of the top 10 plastic injection mould companies in China that offers injection moulding service to various countries in the world with the best quality and excellent after-sales services. The company, which is known to be the leader of the China mould manufacturer, with all its dedication, developed and produced varieties of the injection moulding parts. The optimal service, leading equipment, and advanced technology are valuable reasons for the success of the company.

Sincere tech optimises the design based on the requirements of the customer, and they are very attentive while designing the mould as they can save their money, reducing the processing and mould repair time for their customers.

There are 15 experts in the plastic mould designing team in the company, which is making a fully complete mould design, four engineers who inspect the mould design, and two technical managers to verify the mould structure before mould manufacturing. This team is proficient in operating both UG and PRO-E software with full dedication.

The engineers of the company have the specialisation of the product so that they can provide their customers with worthwhile suggestions and technical support. The design engineers will offer DFM (design for manufacturability) in two business days, and within five days they will supply fully moulded designs to the customers.

Mould developments with perfect design and the top mould manufacturing processing technologies with constant work are their key to success. Their superior emphasis on design, sophisticated working devices, and ideal processing systems provide their clients with more satisfaction.

Sincere Tech has launched three automatic production lines in the surface treatment and workshop that are dustproof and are used in surface texture, surface spray, IMD, etc. They provide their customers with injection mould making and injection moulding services at a low cost, which could not be provided by their competitors. If you are looking for an injection mould or injection moulding China partner to support your business, then you could contact our team, and we will reply to you within two business days.

We have over 18 years of rich working experience plus 15 years of skilled technical English communication.

Good price, good quality, and good service is our tenet.

We guarantee your project will be successful, look at the below picture what our happy customers say.

Are you ready to start your mold project with China mould maker Now, 

Send us your requirement for quotation, you won’t lose anything but will get competitive China injection mould price. Check below what is happy customer says

China mould
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Plastic Mold China

plastic mold china

Plastic Mold China is a major supplier of custom plastic molds due to its relatively low labor costs and strong manufacturing infrastructure. Many global companies source their plastic molding needs from China, taking advantage of the country’s capabilities in mold design, engineering, and production.

Mold-produced gifts are of vital value throughout a wide variety of industries. Bringing on a China mold maker can simplify the process for all of the companies in the world. Plastic mold Manufacturers in China is a topic that has piqued the interest of major companies.  However, when businesses aim to compete in their respective markets, they must consider the fundamentals of the method itself.

Plastic Mold China

Why you should use plastic mold China service?

There are several reasons why companies choose to use the Plastic Mold China service:

  1. Cost-effective: Labor costs in China are lower compared to other countries, making plastic molding services more affordable. This results in significant cost savings for companies that source their plastic molding needs from China.
  2. Experienced workforce: China boasts a vast pool of skilled and experienced workers, particularly in the plastic mold industry. The experienced workforce guarantees the production of plastic molds that meet the highest quality and precision standards.
  3. Advanced technology: Chinese mold manufacturers have access to and invest in the latest technology and equipment, including computer-aided design (CAD) and computer-aided manufacturing (CAM) systems. This allows them to produce high-quality molds with intricate designs and precise dimensions.
  4. Large production capacity: China is one of the largest producers of plastic molds in the world, with the ability to handle large-scale production runs. This means that companies can meet their high-volume plastic molding needs in a timely and efficient manner.
  5. Strategic location: China is a global manufacturing hub, and its proximity to other Asian countries makes it an ideal location for companies looking to source their plastic molding needs. This also allows for simple and efficient transportation of finished products to other markets.
  6. Quality control: Many Chinese mold companies have strict quality control processes in place, ensuring that the finished products meet the highest standards of quality. This helps companies ensure that they receive consistent, high-quality plastic molds that meet their specific requirements.

The combination of cost-effectiveness, experienced workforce, advanced technology, large production capacity, strategic location, and quality control makes plastic molding services in China a cost-effective and efficient solution for companies looking to produce plastic parts at scale.

China mold company

These factors make the Plastic Mold China service a cost-effective and efficient solution for companies looking to produce plastic parts at scale.

Sincere Tech is a China plastic injection molding company. We offer custom plastic mold and injection molded products to America, Europe, and the world. If you have a project in hand that needs plastic mold China companies to help you, simply send us your part design or sample pictures, and we will send you the best price and solutions for your project.

We guarantee we will never copy or share your data with any other third parties. We can sign an NDA (non-disclosure agreement) contract to protect your project.

Plastic injection molding is one of the emergent commodities available on the market. The generation has the facility to create merchandise that may be difficult to create. To sculpt molds correctly, machines must be optimized.

China mold manufacturing companies are currently working with a wide array of industries the world over.  This has helped China mold makers establish themselves as a global standard. Engaging with those outside industries will be a highly effective strategy for expanding the current supply line.

Some industrial owners are interested in purchasing a variety of custom plastic products from Chinese plastic mold companies. These mold makers typically specialize in manufacturing various plastic components.

Knowledge within the industry could help piece these together. Some business owners are capable of assembling these items independently. Others might want to hire a workforce to regulate this process from beginning to end.

Plastic Mold China has created a very powerful variable for the bottom line that companies need to understand. Many people are eager to follow the blueprints these manufacturers create.

They’re going to be keen to show off their manufacturing procedure when they sign up for a freelance deal. Those deals will usually remain for a time frame, giving owners a chance to evaluate the process itself.

The mold manufacturing industry is capable of handling certain tasks exclusively. A few mold manufacturing companies in China offer exclusive deals to attract business owners. Viewing a gallery of projects will give customers a chance to understand what they’re dealing with.

The injection plastic mold industry in China has been instrumental in helping some overseas companies reinvent themselves. For instance, if you have been conducting market research on a new project for a year or more, you may discover that it has the potential to be a significant global market.

Once your design and prototype testing are complete, you should seek a contract manufacturer to produce your new model. While they may have numerous components to source, your first step should be to identify a plastic mold company and inquire about their assembly service offerings.

Sincere Tech is one of the top 10 mold manufacturers in China. We offer custom plastic mold/molding service, die casting parts service, painting, chrome, spray, and assembly—all in one service here to support you.

Plastic mold manufacturer

The advantages of choosing Sincere Tech as your China Plastic mold Maker

Sincere Tech supplies many kinds of injection molds, injection molding parts, plastic materials, and several plastic molding technologies based on the customer’s requirements.  The R&D department takes the responsibility of analyzing and designing the plastic parts according to the needs of the clients. The project department of the company will perform the foreseen inspection of plastic parts moldings structure, process, and related parts situation. The analysis is also done by the professionals to determine whether the moldings are manufactured according to the design.

Sincere Tech will prepare a professional mold flow analysis report for all molds prior to manufacturing, which will include temperature control, gate assignment, cooling time, and an analysis of the injection process, all of which will enhance the mold design.

The project manager is responsible for the outline process, precision machining, rough machining, machine process, assembly inspection, colliding, and assembly and molding tests. The project manager conducts a molding test to verify the dimensions of the injection molding parts and their alignment with the corresponding parts. The company’s Quality Control (QC) department will inspect the plastic parts mold, focusing on the product size, injection process, appearance, and physical performance.

Sincere Tech will measure all dimensions using a CMM machine, and will also conduct numerous tests to ensure the product can withstand pressure, tensile strength, impulse loading, temperature resistance, and impact resistance. The company applies its abundant experience in producing plastic part moldings to ensure the customers receive products of superior quality.

We subject the plastic parts to various surface treatments to ensure they have an excellent shape that aligns with the customers’ needs. According to the order documents, the company will perform a strict inspection before the shipping of the products. If you are interested in learning more about injection molding parts, or if you have a project that requires an injection mold manufacturing company in China to support the production of injection molds and injection molding parts, feel free to send us your Request for Quotation (RFQ). We will provide you with a quote within two working days.

Our engineers speak fluent English and possess extensive technical experience, ensuring that all issues are resolved after the initial mold trial. The technical specialist oversees the project from start to finish. Most of our project is approved by the customers after the first samples are received; all of these successes are credited to our professional team.

Are you seeking a China injection mold company for plastic molds? Send us an email to get a price. Call us to discuss your project.

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Chinese Mold Company

Injection mold China

About Chinese Mold Companies

China Mold Company is a significant player in the global industry market. Many companies purchase custom molds from Chinese mold companies, some of which may originate from India or other countries. However, China mold companies remain the leading mold manufacturers worldwide. Numerous factors contribute to this phenomenon.

The Chinese mold companies involved in the manufacture of plastic molds use highly advanced technology. The technology used in the mold production process is backed by teams of highly trained designers and mold masters. The combination of these factors ensures the custom plastic molds are manufactured very quickly and efficiently. This is always the key point and advantage from China mold companies, because some other mold makers like India mold companies cannot make high-quality plastic injection molds. This is confirmed by one of the best plastic injection molding companies in India (ITW Group; we made molds for them before).

People from all over the world use the injection molds made in China. Their affordability attracts those who use them. Consumers in the market benefit from the reduction in production costs due to the use of technology. There are many Chinese mold companies that produce high-quality custom plastic injection molds. However, you may still encounter some poor-quality mold makers in China, and we would like to see this happen anywhere in the world.

China mold company

Why Chinese molds are attractive

Lead time, high quality (maybe not the best quality in the world), and good competitive price will attract the attention of consumers from all over the world. The molds manufactured by China Mold Companies are more affordable. This is one of the main reasons why consumers go for them. Sourcing custom molds from other places is quite costly. Most buyers are not very concerned about the best quality of the molds they are buying; today Chinese mold companies can make the best quality custom molds as well, and the price will be more competitive compared to American and European mold makers.

Items made of plastic are more affordable than other metals and materials. Using plastic injection molding, plastic can be molded onto any size or shape with amazing precision. Depending upon what kind of product and what amount of finishing is required, plastic molds are built based on all of the special requirements. Once the molds are checked for standard, it is decided what kind of plastic is required to provide the product with its needed color, rigidity, or flexibility.

Plastic injection molding techniques now permit plastic products to be created with amazing precision and efficiency. Plastic is injected via the hopper in liquid or powder form into the barrel, which is heated up to the required temperature. Melted material is forced into a die or mold. The material takes on the physical features of the mold after cooling down. Every plastic item you view today undergoes this process. If you want to know more information about injection molding, please go to our injection molding page to get more information.

Since 2000, China mold manufacturers have become the best business partners in the plastic injection mold industry. Over more than two years experience, plastic mold makers in China have become more and more professional, experts in the latest mold injection technology, over mold, insert mold, cable insert mold, high glass molding, two-color injection molding process, and so on.

China injection molding

Why some companies avoid Chinese mold company

While some people find Chinese molds attractive, others tend to steer clear of them. There could be several factors contributing to this, but as previously mentioned, if you don’t conduct a thorough search for mold suppliers, you risk encountering problems with mold manufacturers worldwide.

Hidden costs: A quote from a Chinese mold manufacturer may exclude certain costs. It’s crucial to understand all potential costs to ensure you’re ready for them. Typically, the quotation does not include shipping, insurance, or warehousing expenses. This may come as a surprise when you receive your goods, so you may need to obtain an approximate shipment cost in advance. If you have a project, we are happy to estimate the price for you.

Poor Quality: Chinese mold companies have frequently faced accusations of manufacturing goods of poor quality. They also face accusations of lowering the quality of the materials they use to boost their profits. This can compromise the safety of the people using the products. To avoid this issue, create your own mold specifications and instruct your mold suppliers to create molds that meet your standards. If you purchase injection-molded parts from Chinese molding companies, be sure to specify the type of materials, colors, and surface requirements you require for your plastic parts.

SINCERE TECH will never use low-quality materials or recycle materials for our customers, unless the customs department specifically requests it. For export molds, we will use high-quality steels such as 1.2344, 1.2343, NAK80, S136, 1.2738H, among others. We will source all cavity steel from LKM or as per our customers’ specifications, and we will provide all cavity steel certifications to our customers.

Legal challenges: it is very difficult to take legal action against Chinese mold companies. Companies operating here often take different names to avoid possible legal suits. China does not recognize the patent laws of other countries, such as the US. If the products are easily copied, you should exercise caution before purchasing these molds or molded parts from China.

Our company, specializing in the production of plastic molds and molding parts, does not possess any products and will never sell or replicate them to others. We can sign an NDA contract to protect your project. In the meantime, we recommend that you send your design to several suppliers for quotations, as some companies still offer this service. If you believe a mold supplier could be a suitable fit for your project, you should sign the NDA document in advance.

To be honest, we have many customers who trust us a lot. One of them shares everything with us, and we never do anything wrong behind their backs. Another customer has applied for a patent for their products, which means we handle the patent document for them. You should understand how much they trust us, and we can confirm that we never sell your products to anyone else.

Delays: Due to these problems, it is challenging to be certain of the turnaround time. This can significantly impact your own production schedule. To prevent this, you need to set aside some safety time for yourself in case any issues arise.

In summary, a growing number of companies today are purchasing plastic molds and plastic parts from Chinese molding companies. This trend suggests that if you want to boost your profits, you should act swiftly and decisively. If you encounter any issues, take immediate action to resolve them; problems will arise everywhere unless you take steps.

Sincere Tech has experience working with numerous overseas customers and boasts a professional technical team and manufacturing capacity. Our project management team, with a combined 15 years of technical experience and fluency in English, can assist you in resolving any technical issues, ensuring smooth and rapid communication.

How to Source Injection Molding Parts from China mold companies

Plastic has become a highly sought-after material due to its weight, availability, low price, and pliability. However, producing injection molding parts requires the use of plastic injection molds and injection molding machines, which can be expensive to purchase and manufacture, particularly in America and Europe.

Purchasing a custom injection mold can be quite costly, which is why Chinese mold companies have been playing a significant role in mold manufacturing since 2000. These companies offer advantages such as low prices and fast delivery.

Guangdong province is home to numerous Chinese mold manufacturers, offering competitive prices and high-quality molds. The reason for the low mold manufacturing price is the abundance of surrounding facilities that offer mold-related services, which not only lowers the mold manufacturing cost but also expedites delivery.

You can also search for China molding companies on Google, where you will find numerous injection molding companies. However, for detailed information on how to purchase injection molding from China, please visit our other page, “How To Buy Plastic Injection Mold and Molding Parts From China.”

As one of the top 10 mold manufacturers in China, we have 18 years of experience in injection mold, die casting mold manufacturing, and massive production. We offer injection mold costs as low as $500 to support your business, depending on the part size and feature.

We can provide all-in-one services for your project, from part design, prototype, CNC machining, aluminum casting/profile, metal stamping/punch, mold building, massive production, post-manufacturing, assembly, and delivery to your storage house.

We handle all the technological issues in your project, create the final components, and send you samples for testing, allowing you to relax and focus solely on functional testing. If this is the service you are seeking, please let us know. You are welcome to contact us.

Are you looking for A trusted China Mold Company?

Send us your 3D part design or samples pictures, you will lose nothing but will have our competitive price.

If we work on your project.

Your project will be 100% sure successful because we have:

Over 15-year of working experience and 15 years of skilled technical English communication. Professional project management

We can guarantee you that because we are professional.

If you have a technical issue you are welcome to contact us by email

See our happy customers feedback from below.

What are you waiting for? Contact us Now to start your mold project.

China Mold
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China Mold Maker

China Mold maker

Overview of the China Mold Industry

China Mold Maker is one of the most important mold makers in the world. China is home to different categories of moldmakers, and this usually presents a challenge to anyone looking for a mold maker in the country. Many first-time buyers are usually amazed by the sheer availability of mold makers but soon come to realize that they should have taken more time in selecting the most appropriate and suitable mold maker.

It is relatively easy to spot a good mold shop in most of the developed countries, such as the United Kingdom, America, or Japan. Of course, the price is very high, but the case is quite different in China. This is because the numerous mold makers in the country do not all make high-quality molds. Instead, a good number of these mold makers usually produce low-quality molds that are mainly tailored to satisfy the needs of the local market.

It is possible to find the best mold maker in China. This is because there are equal numbers of mold makers in the country, and it only takes time and market research to find them.

China mold maker

Why do you need service from China mold maker

One of the main reasons many plastic injection molding companies are buying plastic injection molds from China is their affordability.  China injection molds are significantly cheaper than molds from other countries, especially those from western mold manufacturing companies.

Many countries are flocking to China to take advantage of this price variation as a cost-saving measure. Despite this affordability, it is important for companies to take several steps in order to ensure that they do not fall prey to the numerous low-quality Chhina mold makers.

First and foremost, companies should carry out comprehensive research on the available China mold makers. Companies should inspect the quality of the molds made by different Chinese mold makers before making a final purchasing decision, and ensure that this inspection informs their decision.

In addition to inspecting the quality of the molds, companies should scrutinize the terms and conditions of the mold suppliers. This should enable the company to enter into a contract with the mold makers who offer the most suitable terms. One of the most important terms of sale considerations is the warranty type and duration. Companies should select injection mold makers in China that offer the most suitable period and warranty terms.

Finally, it’s crucial to find a Chinese mold company that can communicate effectively in English.

understanding of the mold technology. Given that you are conducting business remotely, it is not feasible for you to visit China on a regular basis. Good communication and technical skills can make your project run smoothly and successfully. Here are some observations on plastic injection mold technology:

China Mold Maker

Plastic injection mold/molding technology

Plastic injection molding is what people call the process of filling a plastic mold with liquid plastic and cooling it so it takes shape.  An injection mold maker is the company that makes the mold for injection molding. An injection mold maker makes molds from metals, usually steel or aluminum. Precision is essential in the mold manufacturing process, as any mistake could lead to a repeat of the process or result in a substandard part.

The process of plastic injection molding relies solely on the accuracy of the injection mold. If the plastic injection mold maker makes a mistake in creating the necessary molds to produce a plastic product, the overall result will be defective. The mold maker must have precise measurements of the mold it will make in order to fully meet the standards of the manufacturer and client.

Materials used in the process of plastic injection molding:

The usual materials used by plastic injection molding are plastics like polystyrene, acrylonitrile butadiene styrene, nylon, polypropylene, PC,PEEK, polyethylene, and PVC. Injection molds and molding machines typically use these thermoplastic materials to produce the plastic parts they will sell.

The polystyrene material is lower in cost and material grade. ABS is stronger but less flexible than other plastics. Nylon can resist most chemicals and is more flexible than the previous two. Container manufacturers typically use polypropylene due to its toughness and flexibility. The injection molding process can utilize a variety of thermoplastic materials. Please contact us if you need help choosing a plastic for your project.

If a plastic mold maker decides to use the molds for metal injection molding, they will need to produce more molds. Metal injection molding wears out the molds more than plastic molding because the melting temperature of metal is higher than that of plastic. Manufacturers continue to use injection molds for metal molding despite the additional cost, as the prices of molded metals remain profitable.

China mold

Our Services – Sincere Tech China Mold Maker

Welcome to Sincere Tech, who is a China Mold Maker, your one-stop shop for all your plastic injection mold needs. As one of the top 10 mold manufacturers in China, we provide exceptional mold-making services to customers worldwide. Our team of highly skilled and experienced professionals is committed to delivering high-quality products and services that meet and exceed your expectations.

At Sincere Tech, we offer a wide range of mold manufacturing services to our customers. Some of our services include:

  1. Plastic Injection Mold Making: We specialize in the production of plastic injection molds for various industries. We use the latest technology and equipment to create high-quality molds that meet your exact specifications.
    All of our export molds use HASCO or DME mold components so that the customer can change the mold components easily. We offer a 0.5 to 1 million shot warranty for our export injection molds, including both a half-million shot (pre-hardening mold steel such as P20, S136, NAK80, etc.) and a million shots (hardening mold steel such as 1.2344, 1.2343, H13, etc.). Depending on our customers’ requirements, if any issues arise during this warranty period, we provide free replacement inserts at no cost to our customers.
  2. Mold Design and Engineering: Our team of skilled designers and engineers collaborates closely with you to create comprehensive 3D mold drawings that meet your unique requirements.
  3. Rapid Prototyping: We offer rapid prototyping services to help you test your product designs before mold manufacturing. This helps reduce development time and cost.
  4. Injection Molding: We have a state-of-the-art injection molding facility that enables us to produce high-quality plastic products for a wide range of industries, including overmolding, 2K molding, insert molding, medical injection molding, and many more.
  5. Mold Maintenance and Repair: We provide maintenance and repair services for worn-out or damaged molds. Our team of experts will diagnose the problem and provide the necessary repairs to ensure that your molds are in perfect working condition.
  6. Assembly services: We offer completely product assembly services in China; we have competitive testing equipment for testing, certificate, PDB soldering, assembly, packing, and delivery.
Injection mold China

Why choose the Sincere Tech China mold maker?

Sincere Tech, one of the top 10 mold and plastic injection molding companies in China, provides comprehensive services including part design, prototyping, testing, mold and die manufacturing, certificate, PCB soldering, assembly, packing, and shipping products to America, Europe, and other regions.

Whether your project requires a few hundred plastic molding parts in a short timeframe or millions of parts over an extended period, we offer the ideal injection mold and molding solution to reduce your plastic mold and injection molding costs, along with electronic assembly services. Sincere Tech China Mold Maker boasts an assembly line equipped with all necessary inspection equipment to thoroughly inspect all goods before delivery.

Working with Sincere Tech plastic injection molding China involves more than just taking your order and providing you with molds and molding parts; we collaborate with you at every stage, from the design and function testing to the project’s completion. We will review all potential issues and provide suggestions to address them.

At Sincere Tech, we pride ourselves on providing exceptional services to our customers. Here are some of the reasons you should choose us:

  1. Quality Products: We are committed to delivering high-quality molds and products that meet and exceed your expectations.
  2. Experienced Professionals: Our team of experienced professionals has the expertise to handle all your plastic injection mold needs.
  3. Competitive Prices: We offer competitive prices without compromising on the quality of our products and services; mold costs as little as $500. Contact us for a quote.
  4. Fast Turnaround: We understand the importance of meeting deadlines, which is why we strive to deliver our products and services within the shortest time possible.
  5. Customer satisfaction: We are committed to ensuring that our customers are satisfied with our products and services. We collaborate closely with you to meet your needs. Our engineers speak fluent English and have 10 years of technical skill. This will give us the best service to our customers. Our engineers will keep our customers posted every week and inform them of the manufacturing status of every project.

If you have a project that needs an injection mold maker from a Chinese mold company, please don’t hesitate to contact us. We will quote you the price in 24 hours..

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Turning Machining Manufacturing

Turning is a type of machining, a material evacuation process, which is utilized to make rotational parts by removing undesirable material. The turning process requires a turning machine or machine, workpiece, apparatus, and cutting instrument. The workpiece is a bit of pre-formed material that is verified to the installation, which itself is connected to the turning machine, and permitted to pivot at high speeds.

The shaper is ordinarily a solitary point cutting apparatus that is additionally verified in the machine, albeit a few operations utilize multi-point devices. The cutting device bolsters into the pivoting workpiece and removes material as little chips to make the ideal shape.

Turning is utilized to deliver rotational, regularly axisymmetric, parts that have numerous highlights, for example, gaps, grooves, strings, decreases, different breadth steps, and even shaped surfaces. Parts that are manufactured totally through turning frequently incorporate segments that are utilized in restricted amounts, maybe for models, for example, handcrafted shafts and clasp.

Turning is likewise generally utilized as an auxiliary process to include or refine highlights parts that were fabricated utilizing an alternate process. Because of the high resiliences and surface completes that turning can offer, it is perfect for adding exactness rotational highlights to a section whose essential shape has just been framed.

How Turning Is Performed

Turning is acted in one of two different ways: manual or programmed. Previously, producers and different organizations depended carefully on manual turning. Manual turning requires a human specialist to persistently alter the machine and additionally workpiece. Programmed turning, in any case, streamlines turning processes utilizing a PC numerical control (CNC) framework. It’s a quicker and progressively proficient arrangement that is gotten progressively well known among producers as of late. Human specialists should at present determine the workpiece’s determinations in a PC program, yet CNC machines will make an interpretation of these particulars into the proper turning operations.

PROCESS

Turning is a machining process. Turning, as other machining processes, is a material evacuation process. During turning, some portion of the underlying material is expelled. The machinery that does this process is called a turning machine or machine.

Process steps:

Load/empty time: Fix the workpiece into the turning machine. This progression relies upon size, weight, and different attributes of the workpiece.

Cut time: Cutting apparatus makes all the vital slices to get wanted piece.

Inert time: Remove material. Change instruments and modifying machines.

Tools substitution time: The time required to supplant a device that has surpassed its lifetime.

After the process isn’t important to apply treatment to improve properties since it, for the most part, has decent surface completion and tight resistances.

During the process, operations are completed inside and outside. These operations are:

Turning

Facing

Scoring

Cut-off

Separating

Stringing

Drilling

Boring

Reaming

Tapping

Turning machines can likewise be PC controlled. For this situation, the turning machine is CNC (Computer Numerical Control). The developments of workpiece and cutting instrument are preprogrammed. It’s an exceptionally high exactness turning machine.

Advantages of turning are:

Great surface completion.

It requires less vitality and quality than different processes.

Gathering chips is simpler.

Disadvantages.

Most deformities are errors in an element’s measurements or surface unpleasantness.

Restricted to rotational parts.

Noteworthy device wear.

we create a wide scope of items from a colossal assortment of materials producing by turning machine.

We are given by manufacturing plants that can create things totally by turning machining from roughing operation to the assistant operations important to complete the item with customers ‘ prerequisites.

searching for the best turning machine manufacturer, here is the ideal spot for you. look no more…..

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Pipe Fitting Injection Molding

Pipe fitting injection moulding

Discover the Precision Power of Pipe Fitting Mould

Would you believe that there are thousands of unseen connections running the world?

From the complex plumbing beneath residential houses to the expansive irrigation networks that nourish crops, an army of components concealed out of sight ensures everything flows and runs smoothly.

But at the very heart of these systems lie the humble pipe fitting, the often unacknowledged hero that connects, directs, and controls the flow.

The million dollar question now is, how are these fittings crafted with such exemplary precision and consistency? The answer is none other than the remarkable invention in the form of the pipe fitting mould.

The PVC pipe fitting mould functions as a template that gives shape to plastic molten plastic. Unlike traditional methods such metalwork, which can be time-consuming and susceptible to human error, a China pipe fitting mould offers a range of benefits that have made a significant breakthrough in the plumbing industry.

Pipe fitting injection molding

PVC Pipe Fitting Injection Molding

For the most parts, thermoplastic PVC fittings are injection or pressure formed, manufactured utilizing areas of pipe, or machined from shaped plates. Injection molding is utilized to create fittings up through 12 creeps in width, and fittings bigger than 12 inches are regularly manufactured from segments of pipe.

pipe fitting injection molding is the process for pipe fitting mold delivering, similar to elbow fitting, tee fitting, etc. The vast majority of the littler and fair measured fittings are created by utilizing the injection molding process.

PVC Pipe Fitting Injection Molding products are a kind of component used for connecting pipes into the pipeline. the PVC pipe fitting injection molding parts require high precision, stable size and good surface quality, which is a well standard quality for global customers. We have been made lots of different types of PVC pipe fitting mold and molded products for customers from the UK, United States, Australia, Japan, and Germany. We process various kinds of PVC mold and other custom plastic molds and products for our customers, including home appliance mould, auto accessories mould and plastic furniture mould.

If you have any requirements for any pipe fitting mold or pipe fitting injection molding parts, you are welcome to contact us.

Pipe fitting injection molding process

One significant processes utilized to produce plastic pipe fittings is the injection molding. Gear to shape fittings comprises of a form and an injection molding press.

The shape is a part metal square (typically steel or hardened steel) that is machined to frame the depressions in the square. Hollows in the form parts are made by apparatuses molding the part hole. The shaped parts are made by filling the cavity in the form through a filling port called entryway. Contingent upon the part to be made, an injection form can be made with various holes and coordinated by a few doors.

Likewise, this sort of part is commonly empty. At that point is significant the structure of the centers so as to create enough quality for interior surfaces, that are significant in the appropriateness of the pipe fitting.

The injection molding press has two parts, a press to open and close the shape and an injection extruder to infuse material into the formed hole.

At the point when the shape is shut, the softened material is infused into the form cavities under high tension at that point, the form is cooled by water circling and when the parts have set, the shape is opened and parts are catapulted.

Pipe fitting mould

Efficiency and Speed: Mass Production Made Easy

Can you even fathom how it will be like if every pipe fitting had to be crafted by hand? Not only would it be leaving a big hole in the pocket, but even the smallest mistakes in size or shape can easily result in leaks and malfunctions. A reliable pipe fitting mould manufacturer eliminates this problem.

High-quality pipe fitting mould makes way for high-volume fabrication of matching fittings to guarantee consistent and reliable products. It means faster completion times of projects and major cost savings for both manufacturers and consumers.

Dimensional Accuracy: A Perfect Fit Every Time

A perfect and seamless fit is among the most critical aspects of any plumbing system. Leaks not just lead to precious water getting wasted as it can also leave behind a significant damage to any property. PVC pipe fitting mould guarantees clear-cut dimensions to ensure seamless connection of fittings with pipes. This gets rid of leaks and forms a reliable watertight system.

Design Flexibility: A Mould for Every Need

What makes China pipe fitting mould beautiful is their versatility. From the simple elbows and tees to intricate connectors with various inlets and outlets, pipe fitting mould can be designed to create an extensive plethora of fittings. This allows a pipe fitting mould manufacturer to cater to definite needs and applications to ensure the perfect fitting for different plumbing challenges.

Material Versatility: The Right Stuff for the Job

A pipe fitting mould is not just limited to one specific material. These moulds can be crafted using various metals like steel or aluminum. They can also withstand high temperatures and pressures often found in industrial applications.

On the other hand, for applications that require lighter weight or resistance to corrosion, plastic or composite materials are recommended. This flexibility ensures choosing the right material for the job to maximize the lifespan and performance of the pipe fittings.

The Bottom Line

A pipe fitting mould is a tangible proof of how inventive and clever mankind can be. These moulds revolutionized the plumbing industry as they make way for the mass production of precise, reliable, and versatile pipe fittings.

So the next time you turn on a faucet or watch an irrigation system that functions without hiccups, remember the silent heroes behind the scenes – the pipe fitting mould that ensures a world where water flows freely and efficiently.

We have broad involvement with the structure, advancement, and assembling of plastic injection molds for the creation of Pipe Fitting Injection Molding. We produce parts in a wide scope of sizes and shapes for any application. We fabricate molds as per the most requested models hence as custom parts for exceptional applications.

Fittings that are delivered by injection moulding are accessible in different shapes and sizes, for example, coupler, TEE, reducers, elbows 90º – 45º, crosses, end tops, attachments, connectors, bushings, fittings… And they are utilized worldwide in clean and tempest sewer frameworks, drinking water supply, rooftop channels, water system, waste, gas supply, ventilation, mining and modern, correspondences, electrical, fumes frameworks, and so on.

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Plastic Crate Mould

Crate mould

Unveiling the Organized World of Plastic Crate Mould

You always see plastic crates no matter where you go. After all, these seemingly simple containers offer a robust and versatile storage solution, from the crisp vegetables in the supermarket to the tools in the garage,. But have you ever wondered how these plastic workhorses are born? The answer lies in a specialized yet fascinating realm: plastic crate moulds.

What is Plastic Crate Mould

Plastic crate mould, also known as a plastic crate injection mold, is a specific type of mold used in the manufacturing of plastic crates. Plastic crates are widely used in various industries for storage, transportation, and organization purposes. They are durable, lightweight, and stackable, making them ideal for applications such as logistics, agriculture, retail, and more.

The plastic crate mould is designed to create the cavity and shape required for manufacturing plastic crates through the injection molding process. It consists of two main parts: the core and the cavity. The core forms the internal shape of the crate, while the cavity defines the outer shape and surface details.

The plastic crate mold is typically made of high-quality steel or aluminum to withstand the pressures and temperatures involved in the injection molding process. It is precision-machined to ensure dimensional accuracy and repeatability.

The process of plastic crate molding involves injecting molten plastic material, usually polypropylene (PP) or high-density polyethylene (HDPE), into the mold cavity. The molten plastic material fills the mold under high pressure, conforming to the shape and details of the mold. After cooling and solidification, the mold is opened, and the molded plastic crate is ejected.

Plastic crate molds can be designed with various features to meet specific requirements, such as handles, interlocking mechanisms, labeling areas, or ventilation holes. The design of the mold depends on factors like the desired crate size, load capacity, aesthetics, and functionality.

Manufacturers or mold makers with expertise in plastic crate mold design and manufacturing can provide custom mold solutions tailored to specific crate designs and production requirements. These molds are typically produced using advanced computer-aided design (CAD) software and precision machining techniques to ensure high-quality and efficient production of plastic crates.

Sincere Tech is the leading plastic crate mold manufacturer in China. We manufactured custom plastic mold around 200 sets of different types of molds for our customers, around 20 percent of plastic crate molds for our customers. After many crate mold cooperation with German and Italian customers, Sincere Tech has accumulated and updated many times for advanced crate mold design and crate mold tooling.

We have been made a different type of plastic crate moulds such as plastic industrial crate mould, plastic vegetable crate mould, Plastic beer bottle crate mould, plastic fish crate mold, bread crate mould, plastic foldable crate mould (Collapsible crate mold), plastic storage crate molds, etc.

Plastic Big Crate Mould

Plastic Big Crate Mould

The Magic of Moulding Process

You can think of a plastic crate mould as something similar to a giant cookie cutter. However, the only difference is that it is for molten plastic rather than dough. A plastic crate mold is made from high-grade steel machined to perfection to produce the exact shape and features of the desired crate.

Try to think of a mind-boggling puzzle with numerous interlocking components. The core of the plastic crate mould forms the crate’s base, while cavity blocks produce the hollow interior and any intricate details such as handles or stacking ridges.

Building the Strength: Mould Design Considerations

There is an intricate process involved in the creation of plastic crate mould that strikes the perfect balance between functionality and cost-effectiveness of plastic crate mould price. Several factors such as the size, weight capacity, and stacking ability of the crate all affect the final design of the mould.

  • Ejection Mechanisms

Efficient removal of the finished crate from the mould is paramount.  Ejector pins, strategically placed within the mould, push the crate out after it cools.  Sometimes, sliders or cores are incorporated for more complex designs with deep undercuts.

  • Gate Placement

The gate is the crucial entry point for molten plastic into the mould cavity.  Its location significantly impacts the final product’s quality and aesthetics. A strategically placed gate ensures even flow of plastic, minimizing imperfections and optimizing material usage.

  • Strength and Durability

The mould steel needs to withstand the immense pressure and heat of molten plastic during injection moulding.  Special emphasis is placed on designing ribs and support structures within the mould to ensure it maintains its shape over countless production cycles.

Beyond the Basics: Mould Innovations

The world of plastic crate moulds is constantly evolving. Here are some exciting advancements:

  • Hot Runner Systems

These ingenious systems keep the plastic molten only at the injection point, reducing energy consumption and minimizing material waste.

  • Multi-cavity Moulds

These moulds create multiple crates simultaneously, boosting production efficiency.

  • Textured Surfaces

A plastic crate mould can be designed to give crates their textured surfaces that can improve their grip and lower the risk of items slipping during transportation.

The Moulding Symphony: Collaboration is Key

Creating a successful plastic crate mould requires a collaborative effort. Mould designers work closely with crate end-users to understand their specific needs.

The material engineers in charge of the project double-check the chosen steel to determine its ability to endure the moulding process and the demands of the final product.

Plastic crate mold makers put their expertise into use during machining and fabrication to breathe life to the vision of the designer.

A Future of Sustainability

The sustainability drive affects the design of plastic crate mould as well.  Many of these moulds are now built using recycled steel. The possibility of creating crates using eco-friendly recycled plastics is now under serious consideration.

How to start the crate molding production business?

To start the factory for crate molding production, you need a professional plastic mold company for technical support from crate part design, plastic crate molds manufacturing, injection molding machine choose and supplying and other detail technology. please contact us that we can offer you our best support for your plastic crate molding solution from design to a real plastic crate mold, below are some of the plastic crate molds we made before.

When you have done the plastic crate molds then you need to have molding equipment, like injection molding machine, material drying equipment, hot runner controller, cooling system like water chiller, cooling tower for the plastic molding shop, basically, all of those crate molding production equipment you should buy at the same time when you make the plastic crate mold, you need to select the injection molding machine that suites of this crate mould which you make for, like the shot weight, loading size, tonnage, etc,

Considering the different crate size and crate mould structure, the injection machine size is ranged from 380T to 1250T. For example, the 280x340x110mm crate with one cavity mould only needs 350 tonnage machines. When you make a folding crate which extended with mold size 1100x700mm to folding crate size 600x400x110mm of fruit crate molding, you ‘d better order 1250 tonnage injection machine.

Which is the most popular crate product in the market?

There are many popular crate molding products on the market, each country has its own popular crate molding products. When we talk about Europe’s standard there are fruit crate molding parts, vegetable crate part, plastic milk crate part, and thin-wall bottle crate, plastic folding crate, bulk crate containers, collapsible crate, Europe pool crate, nestable cate containers, etc.

We suggest you start your crate molding production one by one, choose the easy one but the most popular one to start at first. We offer you any custom plastic crate molds, such as fruit crate mold, vegetable crate mold, milk crate mold, plastic folding crate mold manufacturing services with competitive price and long lifetime.

If you need high-quality plastic crate mould, Send us an email for a quotation, we will offer you a price in 24 hours.
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TPU Injection Molding

TPU portable computer cover

What is TPU Injection Molding

TPU injection molding refers to the process of injecting Thermoplastic Polyurethane (TPU) into a mold to produce a finished product. TPU is a type of material that exhibits the properties of both thermoplastics and elastomers. It is often used to produce products that require flexibility, durability, and resistance to abrasion.

TPU injection molding is a versatile process that can be used to produce a wide variety of products, including footwear, industrial parts, medical devices, and more. It offers many benefits over traditional manufacturing methods, including lower costs, faster production times, and greater design flexibility. TPU materials are also recyclable, making them a more sustainable option for manufacturers.

TPU (Thermoplastic polyurethane) injection molding process has many methods, including injection molding, blow molding, compression molding, extrusion molding, etc., among which injection molding is most commonly used. use the injection molding process to mold TPU into required TPU injection molding parts, which are divided into three stages: pre plasticizing, injection, and ejecting out. The injection machine is divided into plunger type and screw type. Screw type injection machine is recommended because it provides uniform speed, plasticization, and melting.

TPU phone cover molding

TPU phone cover molding

1. Design of injection machine

The barrel of the injection machine is lined with copper-aluminum alloy, and the screw is chrome plated to prevent wear. The length diameter ratio of screw L / D = 16 ~ 20 is better, at least 15; the compression ratio is 2.5/1 ~ 3.0/1. The length of the feeding section is 0.5L, the compression section is 0.3L, and the metering section is 0.2L. The check ring shall be installed near the top of the screw to prevent backflow and maintain the maximum pressure.

The TPU should be processed with a self flow nozzle, the outlet is an inverted cone, the nozzle diameter is more than 4mm, less than 0.68mm of the main channel collar inlet, and the nozzle should be equipped with a controllable heating belt to prevent material solidification.

From an economic point of view, the injection volume should be 40% – 80% of the quantitative amount. The screw speed is 20-50 R / min.

2. Mold design for TPU injection molding

Mold design should pay attention to the following points when molding with tpu material injection molding:

(1) shrinkage of molded TPU molding parts

Shrinkage is affected by the hardness of raw materials, thickness, shape, molding temperature, mold temperature, and other molding conditions. Generally, the shrinkage range is 0.005-0.020cm/cm. For example, a 100 x 10 × 2mm rectangular test piece shrinks in the length direction of the gate and the flow direction, and the hardness of 75A is 2-3 times larger than that of 60 shore degree. The effect of hardness and thickness of TPU on shrinkage is shown in Figure 1. It can be seen that when the hardness of TPU is between 78a and 90a, the shrinkage decreases with the increase of thickness; when the hardness is between 95A and 74d, the shrinkage slightly increases with the increase of thickness.

(2) Runner and cold slot well

The main runner is a section of the runner connecting the injector nozzle to the shunt channel or cavity in the mold. The diameter should be expanded inward, with an angle of more than 2 degree, so as to facilitate the removal of flow channel vegetations. The shunt channel is the channel connecting the main channel and each cavity in the multi-groove mold, and its arrangement on the mold should be symmetrical and equidistant. The flow channel can be circular, semi-circular and rectangular, with a diameter of 6-9mm. The runner surface must be polished like the cavity to reduce flow resistance and provide a faster filling speed.

A cold well is an empty place (extra extend runner) at the end of the main runner, which is used to catch the cold material produced between the two injections at the end of the nozzle, so as to prevent the diversion runner or gate from blocking by cold material. When the cold material is mixed into the mold cavity, the internal stress of the product is easy to occur. The diameter of the cold material hole is 8-10 mm, and the size is about 6 mm long.

(3) gate and vent

The gate is the runner connecting the main flow channel or the shunt channel and the cavity. Its cross-sectional area is usually smaller than the runner passage, which is the smallest part of the runner system, and its length should be short. The gate shape is rectangular or circular, and the size increases with the thickness of the product.

The thickness of the product is less than 4mm, with a diameter of 1mm; the thickness of the gate is 4-8mm, with a diameter of 1.4mm; the thickness of the gate is more than 8mm, with a diameter of 2.0-2.7mm. The gate position is generally selected at the thickest part of the product, which does not affect the appearance and use, and is at right angles to the mold, so as to prevent shrinkage and avoid spiral pattern.

Exhaust or venting slot is a kind of slot type air outlet opened in the mold, which is used to prevent the molten material from entering the mold from getting involved in the gas and to discharge the gas from the mold cavity.

Otherwise, the products will have air holes, poor fusion, insufficient filling or air trap, and even burn the products due to high temperatures caused by air compression, resulting in internal stress of the products. The exhaust port can be set at the end of the melt flow in the mold cavity or on the parting line of the plastic mold, which is a 0.15mm deep and 6mm wide pouring slot.

It is necessary to control the TPU mold temperature as evenly as possible to avoid warping and twisting of the parts, below are some TPU injection molding products we made before. If you have any requirement for TPU or TPE injection molding  products, welcome to contact us.

TPU injection molding

TPU injection molding

3 Molding conditions

The most important molding condition of TPU (Thermoplastic polyurethane) is the temperature, pressure and time that affect the flow and cooling of plasticization. These parameters will affect the appearance and performance of TPU injection molding parts. Good processing conditions should be able to obtain even white to beige parts.

(1) Temperature

The temperature to be controlled in the TPU plastic injection molding process includes barrel temperature, nozzle temperature, and mold temperature. The first two temperatures mainly affect the plasticization and flow of TPU, and the second one affects the flow and cooling of the TPU injection molding part.

  • Barrel temperature – the selection of barrel temperature is related to the hardness of TPU material. The melting temperature of TPU with high hardness is high, and the highest temperature at the end of the barrel is also high. The temperature range of the barrel used for processing TPU is 177 ~ 232 ℃. The temperature distribution of the barrel is generally from one side (rear end) of the hopper to the nozzle (front end), gradually increasing, so as to make the TPU temperature rise steadily and achieve the purpose of uniform plasticization.
  • Nozzle temperature – the nozzle temperature is usually slightly lower than the maximum temperature of the barrel to prevent the possible salivation of molten material in the straight-through the nozzle. If the self-locking nozzle is used to prevent salivation, the nozzle temperature can also be controlled within the maximum temperature range of the barrel.
  • Mold temperature – mold temperature has a great influence on the internal performance and apparent quality of TPU products. It depends on the crystallinity of TPU and the size of products. Mold temperature is usually controlled by constant temperature cooling medium such as machine water.
    TPU has high hardness, high crystallinity, and high mold temperature. For example, Texin, hardness 480A, mold temperature 20-30 ℃; hardness 591A, mold temperature 30-50 ℃; hardness 355d, mold temperature 40-65 ℃. The mold temperature of TPU products is generally 10-60 ℃. Mold temperature is low, melting material is frozen too early and streamline is produced, which is not conducive to the growth of spherulites, so that the crystalline of products is low, and late crystallization process will occur, which will cause post shrinkage and performance change of products.
  • Pressure – the injection process is pressure including plasticizing pressure (back pressure) and injection pressure. When the screw retreats, the pressure on the top of the melt is the backpressure, which is regulated by the overflow valve. Increasing the back pressure will increase the melt temperature, reduce the plasticizing speed, make the melt temperature uniform and the color mixture uniform, and discharge the melt gas, but will extend the molding cycle. The backpressure of TPU is usually 0. 3 ~ 4MPa. Injection pressure is the pressure exerted on TPU by the top of the screw. Its function is to overcome the flow resistance of TPU from the barrel to the cavity, to fill the mold with molten material, and to compact the molten material.
    The flow resistance and filling rate of TPU are closely related to the melt viscosity, while the melt viscosity is directly related to TPU hardness and melt temperature, that is, the melt viscosity is not only determined by temperature and pressure, but also by TPU hardness and deformation rate. The higher the shear rate is, the lower the viscosity is; the higher the hardness of TPU is, the higher the viscosity is.
    Relationship between viscosity and shear rate of resin with different hardness (240℃). At the same shear rate, the viscosity decreases with the increase of temperature, but at the high shear rate, the viscosity is not affected as much by temperature as at a low shear rate. The injection pressure of TPU is generally 20 ~ 110MPa. The holding pressure is about half of the injection pressure, and the backpressure should be 1. Below 4MPa to make TPU plasticized evenly.
  • Cycle time – the cycle time required to complete an injection process is called the molding cycle time. Cycle time includes filling time, holding time, cooling time and other times (opening, demoulding, closing, etc.), which directly affects labor productivity and equipment utilization. The forming cycle of TPU is usually determined by hardness, thickness, and configuration. The high hardness cycle of TPU is short, the thick cycle of the plastic part is long, the complex cycle of plastic part configuration is long, and the forming cycle is also related to mold temperature. The TPU molding cycle is generally between 20-60s.
  • Injection speed – the injection speed mainly depends on the configuration of TPU injection molding products. Products with thick end face need lower injection speed, while products with thin end face need faster injection speed.
  • Screw speed – The processing of TPU injection molding products usually requires a low shear rate, so a lower screw speed is appropriate. The screw speed of TPU is generally 20-80r / min, so it is preferred to be 20-40r / min.

(2) Shutdown treatment

As TPU (Thermoplastic polyurethane) may degrade in extended time under high temperature, PS, PE, acrylate plastic or ABS should be used for cleaning after shutdown; if the shutdown lasts for more than 1 hour, heating should be turned off.

TPU plastic Injection molding

TPU plastic molding

(3) Post-treatment of products

Due to the uneven plasticization of TPU in the barrel or the different cooling rates in the die cavity, it often produces uneven crystallization, orientation, and contraction, which leads to the existence of internal stress in products, which is more prominent in thick-walled products or products with metal inserts. The mechanical properties of products with internal stress are often reduced, and the surface of products is craze or even deformed and cracked. The way to solve these problems in production is to anneal the products.

The annealing temperature depends on the hardness of TPU injection molding products. Products with high hardness have higher annealing temperatures and lower hardness temperatures. Too high temperatures may cause warpage or deformation of products, and too low temperatures cannot eliminate internal stress. TPU should be annealed at low temperature for a long time, and the products with lower hardness can be placed at room temperature for several weeks to achieve the best performance. The hardness can be annealed 80 ℃× 20h under shore A85, and 100 ℃× 20h above A85. Annealing can be carried out in the hot air oven, pay attention to the position not to locally overheat and deform the products.

Annealing can not only eliminate internal stress but also improve the mechanical properties. Because TPU is a two-phase form, phase mixing occurs during TPU hot working. When the TPU injection molding product is cooled rapidly, due to its high viscosity and slow phase separation, it must have enough time to separate and form a micro area, so as to obtain the best performance.

(4) Inlaid injection molding

In order to meet the needs of assembly and service strength, TPU injection molding parts need to be embedded with metal inserts. The metal insert is first placed in a predetermined position in the mold and then injected into a whole product. Because of the great difference of thermal properties and shrinkage between the metal insert and TPU, the TPU products with insert are not firmly bonded.

The solution is to preheat the metal insert because the temperature difference of the melt is reduced after preheating so that the melt around the insert can be cooled slowly and the shrinkage is relatively uniform during the injection process, and a certain amount of hot material feeding effect can occur to prevent excessive internal stress around the insert.

TPU is easy to inlay and the shape of inlay is not limited. Only after the inlay is degreased, it is heated at 200-230 ℃ for 1. The peel strength can reach 6-9kg / 25mm in 5-2min. In order to obtain a stronger bonding, the insert can be coated with adhesive, then heated at 120 ℃, and then injected. In addition, it should be noted that the TPU used should not contain lubricants.

(5) Recycling of recycled materials

In the process of TPU injection molding processing, wastes such as the main flow channel, shunt channel and unqualified products can be recycled. According to the experimental results, 100% recycled material can be fully utilized without adding new material, and the mechanical properties are not seriously reduced.

However, in order to keep the physical and mechanical properties and injection conditions at the best level, it is recommended that the proportion of recycled material be 25% ~ 30%. It should be noted that the type and specification of recycled materials and new materials should be the same.

The polluted or annealed recycled materials should not be used. The recycled materials should not be stored for too long. It is better to granulate and dry them immediately. Generally, the melt viscosity of recycled materials should be reduced and the forming conditions should be adjusted.

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