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Plastic Mold and Mold Maintenance

plastic mold

You need to know how to fix the mold issue, plastic Mold Maintenance, plastic mold repairing, if you are running plastic injection moulding company, mold Maintenance in important.

Mould, indispensable in modern industry development and technological level improvement, is one kind of widely-used process equipment during mid-period of industrial production. According to statistics, moulding accounts for 75% of rough machining of industrial parts and 50% of precision machining. Mould can be classified as cold-punching mold, injection mold (or plastic injection mold), die casting mold, rubber mold and so on.plastic mold

1. Introduction of Injection Mould

1.1 Range of Application:

Injection mould is suitable for thermoplastic like ABS, PP, PC, POM, etc. while rubber mould is fit for thermosetting plastic, such as phenolic plastic, epoxy plastic and so on.

1.1.1 Classification of Injection Mould:

By structure: two-plate mould, three-plate mould

By gate type: edge gate mould, pin gate mould, hot runner mold

1.1.2 Structure of Injection Mould

A. Molding parts/components: normally called as cavity and core, which are the closest part with plastic products.

B. Feeding/casting system: Runner for molten plastic to flow from nozzle to cavity. It is classified as the main runner, sub-runner, runner gate, cold slag well, etc.

C. Leading/Guiding system: The system, determining the relative position of cavity and core during clamping/mold closing, is normally made up by guide pin and guide bushing. the ejector plates also need positioning by guide pin and guide bushing.

D. Demoulding structure: It is the structure ejecting the plastic part from the mold. Commonly, it consists of ejector pin, ejector plate/stripper plate, ejector sleeve, etc.

E. Temperature conditioning system: Cooling water must installed at both cavity and core site to meet the requirement of mold temperature during the injection molding process.

F. Side parting line and side action: Slide should be adopted when there is under-cut structure on the product design, i.e. the structure inconsonant with demoulding direction. It is usually made up by slide, lifter, loose core, etc.

G. Venting system: It consists of two forms: the venting groove and gap between mould components. In order to discharge air in cavity and gas caused in moulding process, venting groove is usually set at parting line, with the principle of designing venting groove as big as possible in compliance with smooth overflow and flashing. Meanwhile, insert pin, ejector pin and mould insert discharge air through gaps between mold components.

plastic mold manufacturer

2. Plastic Mould Repair

Mould repair is needed during occasions of normal or abnormal abrasion and various abnormal phenomena occurred during plastic molding production.

2.1 Preparations for moldmaster (moldmaker)

A. Make it clear the mould is damaged to what extent;

B. Develop a repair plan according to the damaged molding sample.

C. Precise understanding for repair work needed to be done: Mould repair is usually carried out without drawing with the principle of no change of the plastic parts structure and dimension. Therefore, it is prerequisite for our technician to understand precisely where and to what size should the part be repaired.

2.2 The Dos and Donts during assembly and Disassembly Mould

A. Sign mark: The corresponding sign mark in mould base must be remembered clearly when removing guide pin, ejector sleeve, ejector pin, mould insert, holder block, etc, to assure the right re-installation for the mould, especially for those with direction requirements. The following two items should be paid attention to in this process:

  • The signed mark is the exclusive one without duplication;
  • Sign mark should be made on each mould insert accordingly

B. Anti-Damage proofing: Anti-Damage proofing should be carried out for parts easy to install. In other words, parts cannot be installed back with Incorrect installation;

C. Placement: Parts removed should be placed in order while screws, springs, O-ring should be stored in the plastic box.

D. Protection: Protection measures should be made for precision parts such as mould core, cavity and so on, to avoid careless damage by people.

2.3 The Dos and Donts when Repairing Mould texture surface

A. Polishing: Protection measures for texture surface component should be made prior to repair work when polishing is needed for plastic parts with mould sticking and scrapes. It is forbidden to polish texture surface area. Mould shutoff repair should be done if it is unsure for the repair result.

B. Welding line: The following items should be paid attention to during welding on texture surface:

  • Welding rod material should be consistent with that of mould core;
  • Tempering should be done after welding;

C. Re-texture: When mould repair is finished and ready to take it out for re-texture, moldmaker should make good protection of texture area covered with paper, mark position to make texture area and attach texture template with the mould. After mould texturing, moldmaker should examine textured surface carefully to guarantee good quality and then install mould back.

If it is not sure about the repairing result, mold test should be made first. If it is OK, then take mould out to make the texture

3. Plastic Mold Maintenance

Plastic Mold maintenance is more important than mould repair. The more frequently repaired, the shorter the molds life would last. And vice versa.

3.1 The necessity for Mould Maintenance

  • Keep normal movement of the mould and avoid unnecessary abrasion of moving parts;
  • Maintain the mould to normal service lifetime;
  • Reduce oil contamination during production.

3.2 Classification of Mould Maintenance

  • Routine maintenance for the mould;
  • Scheduled maintenance for the mould;
  • Appearance maintenance for the mould.

3.3 Items for Plastic Mould Maintenance

a. Routine maintenance:

  • Oil filling on moving parts like ejector pin, slide, leader pin and ejector sleeve;
  • Mould surface cleaning;plastic mold maintenance
  • Cooling channel dredging;

b. Scheduled maintenance, following the above items;

  • Venting slot cleaning. Add venting slot at air trapping places and position burnt mark area;
  • Repair of damaged and wearing places;

c. Appearance maintenance:

  • Make painting for outside of mould base to avoid rusting;
  • The cavity should be coated with anti-rusting oil/grease after mould dropping/shutoff.
  • Mould should be closed tightly for storage to avoid dust coming into mould core.

3.4 The Dos and Donts for Mould Maintenance

a. For moving parts, oil filling during routine maintenance is necessary;

b. Mould surface must be clean enough: Tag paper cannot be stuck on P/L side. Do not close the mold when molding part is sticking to the cavity or core side, clean the plastic residues at P/L position.

c. Abnormal condition identification, Prompt repair should be made if there is ejection abnormity, great noise during mold-opening and mold-closing.

4. Safety Issues during Mould Repair and Maintenance

Safety should be put in the first place whenever and wherever. Mould repair and maintenance, with close contact with mold machine and steel equipment, is no exception. It is necessary to pay high attention to safety issues during this process.

  • Examine carefully before use to make the sure hanging ring in perfect condition.
  • The worker must wear safety goggle when operating mold machine to avoid flying chip into eyes
  • The worker must wear protective clothing and safety goggle during the welding process.
  • It is forbidden to operate at the bottom of the mould.
  • Injection moulding machine must be in stopped state and nameplate should be hung on it before operating machine.
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Automotive Plastic Mold

Automotive mold

Automotive Plastic Mold from Chia

We know there are many a fashion contracted car parts, it need different parts of the rich also surprises people; And a lot of auto parts in the production of also need certain mold, so the market is need a variety of automobile plastic molds; At the same time due to the use of the car performance is most in need of various parts of the precision of coordinate, so they need auto mold is adherence to specifications.

For car production is a complex process, and that this complexity is the specific performance for the parts of the production process, but if you use the high quality of auto mold is very good, you don’t need to trouble! PURROS can not only provide people with a variety of high quality automotive mold, also can do professional production in the mold.

What is Automotive Plastic Molding?

Automotive plastic molding refers to the process of shaping plastic materials into desired parts and components for use in the automotive industry. This process involves the use of specialized molds, called dies, which are created using computer-aided design (CAD) software. The plastic, typically in pellet form, is then heated and injected into the mold under high pressure. Once the plastic has cooled and solidified, the mold is opened and the finished part is ejected.

There are several different types of plastic molding techniques used in the automotive industry, including injection molding, blow molding, and rotational molding. Injection molding is the most common method, accounting for around 75% of all plastic molding in the automotive industry. It is suitable for producing high volumes of parts with tight tolerances and fine details. Blow molding is used to create hollow parts, such as fuel tanks, and is suitable for low to medium production volumes. Rotational molding is used to create large, complex parts with a seamless, one-piece design and is suitable for low volume production.

Applications of Automotive Plastic Molding

Automotive plastic molding has a wide range of applications, from exterior body panels and trim pieces to interior parts such as dashboards and door panels. It is also used to manufacture a variety of under-the-hood components such as air intake manifolds, engine covers, and transmission parts.

One of the most significant benefits of using plastic molding in the automotive industry is the ability to create complex shapes and designs that would be difficult or impossible to achieve with traditional manufacturing techniques. Plastic molding also allows for the creation of parts with varying thicknesses and strength levels, which can be tailored to meet the specific needs of each application.

In addition to its design flexibility, automotive plastic molding has several other advantages over traditional manufacturing methods. It is lighter in weight, which helps to reduce the overall weight of the vehicle and improve fuel efficiency. Plastic parts are also more resistant to corrosion and can withstand extreme temperatures, making them ideal for use in harsh environments.

Plastic molding also has a lower carbon footprint compared to metal manufacturing techniques, as it requires less energy to produce and produces fewer emissions. This makes it an attractive option for automakers looking to reduce their environmental impact.

Challenges of Automotive Plastic Molding

While plastic molding offers many benefits for the automotive industry, it also presents some challenges. One of the main challenges is the high initial cost of tooling, as the creation of specialized molds can be expensive. Additionally, plastic parts are not as strong as metal parts, and they may not be suitable for certain high-stress applications.

Another challenge of automotive plastic molding is the potential for quality issues. Ensuring that the plastic is properly heated and injected into the mold is crucial for producing parts with consistent quality. Any defects or variations in the process can result in faulty parts that may need to be scrapped.

Finally, there is a growing demand for recycled and sustainable materials in the automotive industry. While plastic can be recycled, the recycled plastic may not have the same properties as virgin plastic and may not be suitable for use in certain applications.

This is the introduction for auto mold, so the rich variety of mold, at the same time to ensure the quality.

For China’s manufacturing industry, a lot of people very bullish on the manufacture of auto mold, because the automotive industry level has very good play to their strength, and now it seems that this is a industry can bring people a lot of people can’t imagine.

Among the many Automotive Plastic Mold maker in what is now the competition is very intense, therefore also make a lot of people are very like this kind of phenomenon can more arouse the vigour of the industry, in now, it seems, mold has such an environment is more and more towards an international standard.

And among manufacturers also have a lot of services, such as car modification industry need some custom of auto mold, as the sample can be custom through such manufacturers, so also can save a lot of need to go abroad for custom-made cost, if you have a automotive parts project then you need Automotive Plastic Injection Molding Companies to finish this project for you, contact us to get price for your automotive project.

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Plastic Injection Mold

Plastic Injection Mold

Plastic injection mold and molding manufacturing company in China! Here you find information about custom plastic injection mold and molding processes, techniques, and specialized molding technology so that you keep yourself informed with the latest trends and technology.

We offer 30% savings for mold manufacturing and molding production services.

We have over 15 years of experience in plastic injection mold and molding manufacturing services, plus fluent technical English communication (technical English communication is very important when working with foreign customers).

We 100% guarantee that your project will be successful. You will be impressed and satisfied with our quality, price, and services.

Send us your requirements for a quotation; you will not lose anything but our competitive price for reference.

We are willing to sign an NDA document to protect your project, and we could send you our customer’s information so that you can verify our quality and services.

plastic injection molds

What is a plastic injection mold?

A plastic injection mold is made of metal steel that has been made with a hollow base apart, as sharp as you want, and later filled with a liquid or any other material that can be used to make your plastic products, which will last millions of cycles. Some of the materials that can be poured into the hollow space of the steel include plastic, metal, glass, and even ceramic materials. The liquid is allowed to solidify, and the block is broken to retrieve the mold that has acquired the shape of the block. A plastic mold is a custom mold that is used for making custom injection molding parts.

 

Plastic mold technology

Plastic mold technology is by far the most popular method to manufacture plastic parts in the world today. This process is used for everything from inexpensive commercial plastic products, like disposable eating utensils and toys, to severe environments and highly stressed technical components, like critical parts for the automotive and aerospace industries.

You’ll find extensive use of injection-molded plastic parts in the electronics world for things like enclosures for cell phones, computers, televisions, and the like, as well as in the medical world, where things like syringe bodies, breathing apparatus, and a wide range of other life-saving devices are employed. No other process has come to dominate modern manufacturing as much as plastic molding, and its use increases every year.

Recently, critical steering components for General Motors cars and trucks were changed from stamped and machined steel parts to a plastic-molded assembly, resulting in a lighter part at a lower cost, quieter, and more reliable.

What is Plastic Injection Molding

Plastic injection molding or injection molding is the process of heating thermoplastic resin to a liquid, then shooting it under high pressure into a mold cavity that is the negative image of the desired part, allowing it to cool, and then opening the mold to allow the completed part to be ejected out of the mold.

In most cases, features can be built into the plastic mold cavity to give the part everything it will need when finished so that no other operations are needed once the part comes out of the mold. Textures, or high polishes, markings, screw holes, lens shapes, and any other features needed in the finished part can be built into the mold, so the finished part automatically has these features incorporated.

The advantages of plastic molding

The beauty of plastic molding is that many parts, even millions, can be made in exactly the same way and will come out the same no matter what. Each piece will have identical features, the same dimensions, and the same physical properties. It is the ideal way to make high volumes because of this consistency. Properly maintained, injection molds can last decades, making millions of parts per year. Properly set up and controlled, the 20 millionth part will be identical to the first part in every measurable way. No other manufacturing process has the potential to operate at this level of consistency.

Multiple cavities of each part can be built into the plastic injection mold tool, so that each time the mold opens, you can make 16 or 32 or 48 or some other multiple of parts for each cycle of the injection molding machine to really increase the production rate and greatly decrease the cost of making a part.

In some cases, several different parts—for instance, a right- and left-hand version of an enclosure—can be made in a single mold to reduce the number of machine cycles required to make multiple parts of an assembly, increasing production and lowering the injection molding cost. Injection molding also offers flexibility not possible with any of the other manufacturing processes.

Injection molding also offers one of the lowest scrap rates of any other manufacturing process as well. Since no second operation is generally required, no material is cut off and thrown away. It is possible to use a special technique to completely eliminate even the small pathways the plastic flows through to cut the material scrap rate to virtually zero, or often, any plastic removed in the process can be reused by pelletizing it and mixing it back into the fresh plastic resin in closely controlled proportions. These capabilities mean a higher percentage of the raw material becomes part of the finished part than in any other process. Plastic injection molding is highly efficient.

Sincere Tech has been one of the top 10 mold manufacturers in China since 2005, located in Changping, Dongguan City. Sicnere Tech offers the plastic injection mold and molding manufacturing service. The company has shown promising growth each year; today, it accumulates to over 30 million RMB.

What makes us a unique plastic injection mold manufacturer?

With so many others in the business, what is it that has made us this successful in all these years? Let us take a look at some features that make us unique and a preferred choice for our customers.

It all starts with the plastic injection mold/molding factory.

Our plastic mold company is clean; everything is well ordered and well managed. When it comes to the technology we use, we make sure that at Sincere Tech we use nothing but the most advanced and high-tech available, be it for software or hardware systems around the factory. It helps us take control of the quality of the plastic mold we produce. To make goo- quality molds and parts.

We use a high-speed FUNAC CNC machine that was imported straight from Japan and has over 24,000 rotation speeds. Moreover, we have two big CNC machines with 2-meter strokes and a full automatic three-coordinate measuring (CMM) machine to ensure that our processes are fast, efficient, and precise. That high-tech equipment, plus our professional team, helps us meet our targets.

Professional team

We have over 65 staff members in our factory, and each one is an expert in his field and fully qualified to handle the different aspects involved in the injection mold making processes. From producing to managing the business, the team has been carefully selected to allow growth and give our customers premium-quality products.

All the engineers on our team have a good command of the English language to ensure adequate technical communication and a rich experience in the project. Even if you are not good at plastic injection molds and part design, our team will lead you and think through every detail on your behalf. This will help your project go smoothly and successfully.

Various Plastic Molded products Available

When it comes to plastic injection molds and injection molding parts, we have qualifications in a lot of fields and are experts in each one of them. The molds and molding parts we produce are used by consumers in household appliances, industries, food packaging, electronics, automobiles, interior parts in cars, etc. Our team puts in the same amount of attention and hard work in each one of these molds to maintain our loyal customer base.

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Customer satisfaction

We realize the importance of keeping our customers happy and thus never compromise on quality. Our plastic injection molds last a long lifetime and always meet every expectation our customers might have of them. The molds and molded products we make pass every test they are put through and are accepted by customers from all fields equally well.

Affordable Price

With the quality we provide, one might expect our plastic injection molds to cost a fortune, but this is not so. All our molds and molded parts are priced very strategically to have market-competitive prices. The quality we produce is available at reasonable rates, and this is what has our customers choosing us time after time.

Customer service

Unlike other brands, we do not forget our customers even after the plastic injection mold has been shipped to our customer side. We provide efficient customer care services, and our staff is always ready to help before, during, or even after the sales have been made.

For us, we are not only the suppliers to the customers. Being on their side, we make every possible effort to ensure customer satisfaction. This is made possible by maintaining transparency in a communication system and ensuring a quick response to all problems they encounter.

So, what are you waiting for? Get in contact with our team right away and have them offer you the best plastic injection molds and molding parts for your project. For us, you are important. Making your business successful is our goal.

Thank you for considering Sincere Tech as your partner for all your plastic injection molding needs. As a leading China mold-making company, we are committed to delivering top-quality plastic injection molds and related services to our customers.

Our experienced team of professionals is dedicated to providing the best possible solutions tailored to meet your specific needs and requirements. With a user-friendly interface, navigating our website to find the products and services you need is easy. We offer a wide range of services, including plastic mold, custom plastic injection molding, rapid prototyping, mold design, post-manufacturing, assembly, and delivery.

At Sincere Tech, we pride ourselves on working with our customers from start to finish, whether you are in need of a single prototype or a large-scale production run. Our team is always available to answer any questions you may have and offer guidance and support throughout the process.

We are confident that our service, expertise, and resources will take your business to the next level. So, why wait? Contact us today if you are looking for reliable, affordable, and high-quality mold suppliers. We look forward to working with you!

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