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Custom Injection Molding

injection molding wall thickness

What is Custom injection molding?

The first question that comes to mind on hearing is what is Custom injection molding?

Custom injection molding refers to the making of plastic parts for specific applications i.e. customizing the plastic injection components as per the customer’s requirements.

Customized injection molding parts

Injection molding is a process in which plastic pellets are melted and injected under high pressure into a mold cavity. The molded parts are then ejected, and the process repeated. The finished products can then be used as is, or as a component of other products. To do so requires an injection molding machine and tooling (often called a mold or die). The molding machine consists of a clamping unit to open and close the mold automatically, and an injection unit to heat and inject the material into the closed mold.

Injection molding utilizes very high pressures and typically the machine is hydraulic or, increasingly, electric. Tooling for production injection molding applications must be able to survive under high pressure and is made from steel or aluminum. The potential high cost of tooling often drives the economics of a plastic molding application. Injection molding is an effective way to make custom parts.

Bascially, most of injection molding parts are customized injection mold, because every single design need its own custom injection mold, onless you buy the ready parts from the market, otherwise you need to make your own custom injection mold for your customized design.

Custom Injection Molding

Injection Molding Process：Plastic Processing, Make Parts From Plastic Material

Finding the right source for your custom injection molding thermoplastic parts is as easy as selecting DONGGUAN SINCERE TECH CO.LTD. With SINERE TECH, you are guaranteed professional quality assurance standards, the latest in technological equipment, and innovative, cost-efficient manufacturing techniques.

Injection Molding Process: A Brief Description

There are three main components in the injection molding process. The injection apparatus itself which melts and then transmits the plastic, the mold, which is custom designed, and clamping to provide controlled pressure. The plastic mold is a specially designed tool with a base and one or more cavities that will eventually be filled with resin. The injection unit melts the plastic granules and then injects them into the mold by either a reciprocating screw or a ram injector.

The reciprocating screw offers the ability to inject smaller amounts of resin in the total shots, which is better for producing smaller parts. After injection, the mold is cooled constantly until the resin reaches a temperature that allows it to solidify.

Complications with Injection Molding

Injection molding complications are few and can be easily avoided by paying close attention to the design of the plastic mold, the process itself and caring for your equipment. Parts can be burned or scorched when the temperature is too high, which is sometimes caused by the length of the cycle time which may be too long. This causes the resin to overheat. Warping of parts happens when there is an uneven surface temperature for the molds.

Surface imperfections (commonly known as bubbles) happen when the melt temperature is too high, which causes the resin to break down and produce gas. This can also be caused by moisture in the resin. Another complication is incomplete cavity filling, which occurs when there isn’t enough resin released into the mold or if the injection speed is too slow, which results in the resin freezing.

Running a Custom Injection Molding Business

Custom plastic injection molding business is a competitive business and to survive you should find your niche market. Most custom molders in business today have found a niche. Through experience, the molder became good at molding a particular type of part or at molding a particular kind of material, or in working in a specific segment of the marketplace. In other words, he acquired an expertise and stuck with it.

Thermoplastic injection molding is the most widely used of all plastic processing methods. Injection molding is a manufacturing technique for making parts from plastic material. Molten plastic is injected at high pressure into a mold, which is the inverse of the desired shape.

Thermoplastics are those which, once formed, can be heated and reformed over and over again.

PP injection molding

PP injection molding

The mold is made from metal, usually either steel or aluminum, and precision-machined to form the features of the desired part. SINCERE TECH provides the highest quality economical plastic molds available today, with less moving parts to reduce maintenance and repair costs.

The injection molding machine reduces pelletized resins and coloring agents into a hot liquid. This slurry, or “melt”, is forced into a cooled mold under tremendous pressure. After the material solidifies, the mold is unclamped and a finished part is ejected.

An injection-molding machine performs the entire process of plastic molding.  These machines serve to both heat the plastic material and form it.  Using different molds the shape of the produced components may be changed.

Injection molding machines have two basic parts, the injection unit, which melts the plastic and then injects or moves it into the mold, and the clamping unit, which holds the mold shut during filling. The unit clamps the mold in a closed position during injection, opens the mold after cooling, and ejects the finished part.

Custom Injection Molded Plastic Parts:

High-Quality Parts, Guaranteed to Specification, Extended Warranty, Retain Mold Integrity, Advanced Design, Quality Assurance

Finding the right source for your custom molded plastic products is as easy as selecting https://plasticmold.net/. One of top 10 mold manufacturers in China that services custom injection mold and plastic molded parts to the world.

With SINCERE TECH, you are guaranteed professional quality assurance standards, the latest in technological equipment, and innovative, cost-efficient manufacturing techniques.

Custom Injection Molding Parts: SINCERE TECCH’s Advantage

The injection molding process offers the lowest piece prices available, but tooling (plastic mold making) prices are generally the highest.  That is why we need to make all of the molds in-house to create top quality plastic mold and the lowest price for our customers, our custom mold cost as low as $500. contact to get price for your own custom plastic injection molding.

And they stand behind their word. They offer their customers the option of joining their Extended Warranty Program guaranteeing the plastic mold we design and builds for you will retain its integrity throughout a specific number of cycles, if we store the molds for you we will do the free mold maintenance for you.

Custom Injection Molding

injection molded plastic parts

For more information, see the home page.

Customized Injection Molded Applications

Injection molding is widely used for manufacturing a variety of parts, from the smallest component to entire body panels of cars. It is the most common method of production, with some commonly made items including bottle caps and outdoor furniture.

We have the ability to produce a wide variety of custom injection molding parts and components, for industries of all types, including:

  • Connectors
  • Wire Shields
  • Vials
  • Cases
  • Switches
  • Housings
  • Face Plates
  • Toys
  • Bezels
  • Push Buttons
  • Knobs
  • Light Pipes
  • Shields
  • Computer Peripherals
  • Phone Parts
  • Gears
  • Typewriter Parts
  • Window Lift Parts
  • Fuse Blocks
  • Wedges
  • Trim Plates
  • DVD Brackets
  • Faucet Extrusions
  • A / C Vents
  • Gear Shift Knobs
  • Tail Lamp Sockets
  • Blood Testers
  • Boat Parts
  • Name Plates
  • Buckles
  • Bottle Ties
  • Component Boxes
  • Spools
  • Bobbins
  • Seat Belt Parts
  • Spacers
  • Lenses
  • Vents
  • Clips
  • Flower Pot Bases
  • Actuators
  • Radiator Tops
  • Junction
  • Boxes
  • Motor Housings
  • Key Fobs
  • Cosmetic Packaging

To provide the best process for your project, you are welcome to send us email, we will offer you the best solution for your custom plastic injection molding  project.

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Plastic Injection Molding Service

plastic injection mold

Looking for plastic injection molding service?

Contact us to get quote, we are A Custom injection mold maker in China that offers plastic injection molding services.

The excellent quality of our plastic molds and molded parts, coupled with our experience and the performance of our services give us today a high international recognition.  Indeed, the company is specialized in International Business and has customers all over the world. SINCERE TECH has very high standards of quality control and always runs long tests to make sure that our Plastic Injection Molding Service reaches all the expectations of our customers. We believe that the quality of a company and its products are seen through time and this is why we like to build strong long-term partnerships with our customer

What is plastic injection molding process?

Plastic injection molding is a manufacturing process in which melted plastic is injected into a mold and then cooled to form a solid part. The mold is created from a metal or plastic tool (1.2344, H13, NDK80, etc.) and is typically made in two halves that are clamped together. The plastic material is heated in a barrel and then forced into the mold under high pressure where it cools and solidifies into the desired shape. This process is used to produce large quantities of identical parts with high precision and repeatability.

When do you need plastic injection molding service?

You may need plastic injection molding service when you require mass production of plastic parts with consistent quality and high precision. This process is ideal for producing large quantities of the same part, as the mold can be used multiple times to produce identical pieces. Additionally, plastic injection molding is well-suited for producing complex and intricate shapes that would be difficult or impossible to achieve with other manufacturing methods. This process is often used in various industries such as automotive, consumer goods, medical devices, and electronics.

plastic injection molding service

plastic molding services

Benefits of plastic injection molding service

The benefits of plastic injection molding service include:

  1. High volume production: Plastic injection molding is ideal for high volume production of identical parts, as the mold can be used multiple times.
  2. Consistent quality: The process is highly repeatable, which leads to consistent quality of parts produced.
  3. Complex shapes: Plastic injection molding can produce complex and intricate shapes that would be difficult or impossible to achieve with other manufacturing methods.
  4. Material flexibility: A wide variety of plastic materials can be used in the injection molding process, including thermoplastics, thermosets, and elastomers.
  5. Cost-effective: The process is efficient and cost-effective for producing large quantities of parts, as the cost of the mold can be spread over many parts.
  6. Precision: The process can produce parts with high dimensional accuracy and minimal tolerance variation.
  7. Automation: Plastic injection molding machines can be automated for increased productivity and reduced labor costs.

Plastic injection molding is a versatile and reliable manufacturing process that can provide significant benefits for producing large quantities of complex and high-precision plastic parts.

Plastic Injection Molding Service in China


We are the manufacturer of our own moulds (toolmaker or plastic injection tooling) and support the production of Injection molded parts allowing reducing your numbers of suppliers. Our injection machines have clamping forces going from 60 to 1050 Tons (2000 Tons outside). Plastic injection molding is the process of producing parts from thermosetting and thermoplastic materials.

Our qualified teams of Designers, Quality controllers and our Research and Development Department allow us to complete our policy: achieving Customer Satisfaction through Improvement and Innovation. The quality of our products and organization permits us to obtain quality certifications (ISO 9001, ) and be awarded numerous times of “Quality Supplier” from different customers. We integrate constantly new resources into our process in order to anticipate any future need of the plastic injection molds market and we became one of the most innovative companies in the sector. The modernity and the organization of our facilities allow us to adapt very quickly to the customer’s needs.

SINCERE TECH has always the objective to stay one of the innovative leaders of the sector and play an important role in our customer’s development. The firm can now propose a total solution from mould design to the semi-finished product (All in-house). SINCERE TECH is always willing to integrate new processes to the solution proposed by staying aware of new technologies. If a customer has a special requirement, we will do everything to fulfill its needs.

Plastic Materials /Commodities

We are used to working with all the classic and less classic plastic materials except PVC (PP, PE, PC, ABS, PC+ABS, PA 6, PA 6.6, PBT, PMMA, TPU, PC+GF, AS, PTFE, POM, PEHD, PEEK…). Our main suppliers are Sabic, Bayer, and Chimei.
About the steel used for our moulds, for export plastic molds we work only with the best steel suppliers like Assab (Sweden), Buderus (Germany), Daido Steel (Japan) LKM( the biggest one in China). For our standard component suppliers, we work with Hasco and DME.

We are used to working with our suppliers the same way we work with our customers. It means good long-term relationships with high-quality policy.

Complex moulds: SINCERE TECH has a rich experience in difficult plastic mould and parts, complex moulds and is an expert in finding solutions to your issues. SINCERE TECH is a real specialist in difficult tooling. To give a classic example: many design companies create plastic products without thinking about mould construction. Then, when the designs are sent to toolmakers, it can be hard for them to make the exact parts (Difficult design, many sliders, many lifters, double injection with materials non-bonding well together, many details in awkward places…).

Most of the classic toolmakers will accept the parts and say that they are able to do it. And then, they will have problems with the plastic injection mould construction, the lead time will be extended and the quality of the tool will not be as expected. Often, these companies have to contact SINCERE TECH to help them to resolve their problems. If you are not sure about the complexity of your part, be sure about your mould maker’s professionalism. SINCERE TECH works closely with its customers in order to resolve any issues.Plastic Injection Molding Service

Thin Wall injection molding: it permits a precise, very accurate molding of plastics and gives better details to the product. This is the name referring to products with a wall thickness lower than 2mm. Usually, the flow is quick, permits a short cycle time and a cost-saving.

Hot runner mold: the special process of injection of plastics where the plastic is kept hot when going through cavities of the mould while the rest of the mould is getting cold to solidify the plastic part and create the molded part: this permits to save plastic material. This is mainly used for parts with medium or large sizes. We are used to working with all popular companies like Yudo, INCOE, Synventive, Husky, HRS… We also have the technology to make our own hot runner systems if the production of the parts (Molding) is made in-house. This again allows our customers to save costs.

Optical Lens Molding: precision molding for glass plastic. This is the technique to produce transparent plastic molded parts (For example Security cameras parts such as the dome cover or also phone frames).

Gas-assist Injection Molding: the plastic parts are gas-assisted molded which means that gas (Most often is nitrogen) is injected at the final stage of the part creation process. It permits to reduce the cycle time, the product weight, the risk of deformation and also the pressure tons injection needed. Moreover, it makes the part’s structure stronger with a better look.

LED/LCD frame molding: injection of plastics used for example to manufacture television screen monitors, computer back-light modules, GPS frames…

IMD, IMF, IML, IMR Molding: In-mold decoration. The decoration of the part is made inside the mould through a film. The film is printed before the molding with the designs wanted. It permits better productivity and extends the decoration’s lifetime. If the customer wants to change the design/decoration of the part, it is not necessary to make another mould but only to change the film. SINCERE TECH is experienced with In-mould forming, in-mold-labeling, and in-mold by roller.

Overmolding: this technique permits to join several components together with a thermoplastic material. This reduces assembly and labor costs. Because the parts are made together, this allows less risk of improper termination or misalignment and increases the design flexibility. Moreover, thermoplastic provides better resistance to vibration or shocks. This technique permits to increase resistance, reduce costs and weights.

Insert Molding: this is a technique where a small part (Stamping part, optical part…) is added or inserted to the Injection molded part.two shot molding

Two-Shot Molding: 2 independent injection units using 2 different materials and/or colors. The first material is injected; then, the mould rotates and the second material is injected to make 1 part. It permits a 2-colour-molding or also called double injection, 2 shot molding, two-shot injection, overmolding, 2K injection, two colour injection, bi-injection, dual shot molding or multi-component molding.

CNC Technology. CNC is an abbreviation for Computer Numerical Control. This is a machine extremely accurately controlled by computer programs permitting a CAM (Computer-aided Manufacturing) through a CAD (Computer-Aided Design). Any plastic injection tool manufacturer uses it but the value-added of SINCERE TECH is the experience, professionalism, and training of the staff.

FMMS Molding or can be called RHCM (Rapid Heat Cycle Molding): excellence surface appearance: permits to take off the welding line. This process is integrated into the molding to save time. It is used for example for clear plastic parts.

US Welding: Ultrasonic Welding: process to weld/ join/ assemble plastic parts thanks to ultra-sounds.

Silk-Screen Printing:  this is to print logos or designs on parts.

Dip-Coating: this is the process of putting the component inside a liquid solution to apply a thin film on it. It permits to manage, change the hardness, the strength of the part by protecting it and expanding the lifetime of the product. Then, the excess liquid has to be drained and evaporation of the solvent is done to create the thin layer.

Laser Etching: this process is made for cutting a shape, a pattern, an image on the plastic part. It is also called laser graving.

Sputtering coating: this is the process of creating a very thin layer of conducting material on the component. It is also called Plasma Enhanced Chemical Vapor Deposition (PECVD) and can be done with most metals like aluminum, stainless steel, copper…

EMI shielding: protect parts from electromagnetic interferences. It is used to protect electrical signals from the outside world. For instance, we use it with marine radars for Garmin.

Waterproof technology: SINCERE TECH has the experience to make water-resistant parts and is able to ensure in-house tests thanks to the IP68 tests.

Sub-assembly: this is the pre-assembly of a component who will be later on being assembled in a larger product.

R&D: SINCERE TECH has its own Research and Development department in order to work with the customers on their projects, advise them on designs, resolve issues and study the feasibility of those.

Quality Control: We have very high standards of quality control in order to respect any requirements from our customers. We have a 100% quality control on our plastic molded parts, it means we control any part coming out of our production.

At Sincere Tech China mold maker, our unwavering commitment to staying at the forefront of the plastic mold industry drives us to embrace advancements and anticipate future trends. We continuously explore innovative materials and composites that offer enhanced performance and promote sustainability. By investing in ongoing research and development, we consistently deliver cutting-edge solutions that meet the evolving needs of our valued customers. As a trusted injection mold supplier in China, we take pride in our unwavering dedication to excellence.

Aligned with our sustainability goals, we place a high priority on environmentally friendly practices. We actively seek out sustainable alternatives, such as biodegradable polymers, and implement recycling initiatives to minimize the environmental impact of our manufacturing processes. By choosing our custom injection molding services, you can align your brand with sustainable manufacturing practices and contribute to a greener future.

Ensuring quality is our topmost priority, and we maintain rigorous quality control measures throughout the entire manufacturing process. Equipped with state-of-the-art facilities and staffed by skilled technicians, we subject each product to thorough inspection and testing. This guarantees exceptional performance, reliability, and customer satisfaction.

When you choose Sincere Tech as plastic injection molding service partner in China, you can expect the highest level of professionalism, expertise, and innovation. Our dedicated team is committed to helping you bring your ideas to life, delivering superior products that excel in performance, durability, and cost-effectiveness.

Partner with Sincere Tech Mould suppliers for your custom plastic injection molding service, and benefit from our comprehensive capabilities, unwavering commitment to quality and sustainability, and our drive to exceed your expectations at every step of the process. Together, let’s bring your innovative ideas to life.

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Plastic Injection Moulding Machine

OEM plastic injection molding parts supplier

What is Plastic injection moulding machine

Plastic Injection Moulding Machine is the most important machine in your business if you are planning to have plastic injection moulding method in manufacturing your plastic products. Through this machine, your company could manufacture a lot of different types of plastic products in 2D and 3D. With the help of plastic injection moulding machine, a lot of different plastic products could be produced from your company.

Surely, the quality of your plastic injection moulding machine will be determining the quality of the molded plastic products produced by your company. Therefore, choosing the best machine to support your business is something important to be taken. Great quality of plastic injection moulding machine will produce high quality of plastic product with strong and great durability. So, do not take the wrong choice.

There are several different types of plastic injection moulding for machine that could support your business well. You can contact some distributors to order a certain product for your company. Or you can also get your selected plastic injection moulding machine through some reliable online stores. However, what you need to do first is looking for more information to get the best selection.

Are you interested to have plastic injection moulding machine in your plastic business company? If so, this following review will be very helpful to give you references about some products that will support your business well. Read the information well and get the best machine for plastic injection moulding that meets the requirements of your company well.plastic Injection Moulding Machines

China Plastic Injection Moulding Machine

As the first option, you can take a look at China Plastic Injection Moulding Machine. This product works great in providing great support to your plastic business company because it offers high efficiency of time. This machine will be very helpful to produce great quantity in faster time.

Therefore, you can save more time to produce bigger quality of products. You can find this machine easily in some online stores. Since this product works in great quality of performance, you can always get total satisfaction with this certain machine for plastic injection moulding as an important part in your company.

SZ-700A Plastic Injection Moulding Machine

Then, you can also get SZ-700A Plastic Injection Moulding Machine. This product will be perfect to be chosen since it is specifically designed in high performance. It is completed with 60-10000 grams of injecting capacity as well as 60-1600 tons of clamping force to bring more supports for your business.

There will be many more advantages offered by this machine for plastic injection moulding. Stable movement curve and gentle shock are just a little advantage offered by this certain product. To easier the operator in controlling this machine, SZ-700A Plastic Injection Moulding Machine is also completed with LCD computer control. It will be great product to be chosen.

50T Automatic Plastic Injection Moulding Machine

Then, you can also get 50T Automatic Plastic Injection Moulding Machine as the next machine to support your business. This product is completed with LCD computer control to easier you set and operating the machine. This product will be perfect to provide injection molding for various thermoplastics such as PC, PP, PE, Nylon, PVC, ABS, PET and many more. By providing this machine, you can produce many types of medium or small size plastic products as well as daily-use commodities.

Related Info to Plastic Injection Moulding Machine

Certainly! Plastic injection molding machines are used in the manufacturing process to produce plastic parts through the injection molding process. Here is some related information about plastic injection molding machines:

  1. Basic Operation:
    • Plastic injection molding machines melt plastic granules and inject them into a mold to create a specific shape.
    • The process involves heating the plastic material, injecting it into the mold, cooling it, and then ejecting the finished product.
  2. Key Components:
    • Injection Unit: It melts and injects the plastic into the mold.
    • Clamping Unit: It holds the mold in place during injection and cooling.
    • Hydraulic System: Provides the power for the machine’s movements.
    • Control System: Manages and monitors the machine’s operation.
  3. Types of Plastic Injection Molding Machines:
    • Hydraulic Injection Molding Machines: Use hydraulic power to operate the machine.
    • Electric Injection Molding Machines: Use electric motors for machine movements, offering energy efficiency and precision.
    • Hybrid Injection Molding Machines: Combine hydraulic and electric systems for improved efficiency.
  4. Mold Design:
    • The mold is a critical component and determines the final product’s shape.
    • It consists of two halves, the cavity and the core, which form the desired shape when closed.
  5. Materials Used:
    • Common materials processed include thermoplastics, thermosetting polymers, and elastomers.
    • Material selection depends on the application, required properties, and production volume.
  6. Applications:
    • Injection molding is widely used across various industries for producing components such as automotive parts, consumer goods, medical devices, and packaging.
  7. Quality Control:
    • Continuous monitoring of the injection molding process is essential for maintaining product quality.
    • Parameters such as temperature, pressure, and cooling time are closely controlled.
  8. Advancements:
    • Industry 4.0 technologies are being integrated into injection molding machines for improved automation, monitoring, and data analysis.
    • Sustainable practices, such as using recycled materials and energy-efficient machines, are gaining importance.
  9. Maintenance:
    • Regular maintenance is crucial to ensure the machine’s optimal performance and longevity.
    • Components like screws, barrels, and heaters need periodic checks and replacements.
  10. Safety Considerations:
    • Injection molding machines pose potential hazards, and safety measures such as machine guarding and operator training are essential.

Understanding these aspects provides a foundation for those involved in the plastic injection molding industry, from machine operators to design engineers and manufacturers.

Plastic Injection Molding or Plastic Injection Moulding

Plastic injection moulding is a method utilized to produce parts of thermosetting with thermoplastic materials. In this process, the raw material is fed into a …

Custom Injection Molding

Custom injection molding will be perfect method to make greater plastic part production in higher efficiency. With the versatility offered by this certain method, you …

Injection Moulding

Injection moulding is a certain industrial term that refers to a technique in producing plastic accessories or stuffs. This method now is quite popular …

If you are looking for mould suppliers offer you plastic injection molding service, welcome to contact us.

 

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Injection Molded Parts

custom injection molded parts

Sincere Tech specializes in custom injection-molded parts fabrication technology. Our engineers design and manufacture individual parts with our high-wear engineering-grade plastic materials, self-lubricating, wear-resistive, and maintenance-free plastic injection molded parts. Each material is designed to perform to the particular needs of your intended use application and can adore harsh conditions, such as chemicals, dirt, or heat resistance.

Our fast line service provides injection-molded plastic parts and prototypes in just 2-3 weeks in short leads. Furthermore, our injection molding techniques are perfect for small to extensive prototyping because we employ cutting-edge 3D-printed injection molds. This enables us to design, fabricate, and bring parts to market with minimal turnaround without compromising quality.

Why Choose Us for Your Custom Injection Molding Needs?

We set ourselves apart because our services comprise as;

  • Perfect for Large Order Quantities: Suitable for large orders likely above 1000s pieces of prototypes.
  • Most diminutive or maintenance-free parts with Longer Service Life: Our components provide longer serviceability without requiring maintenance.
  • Rapid turnaround: Up to 70% faster than comparable injection molding methods.
  • Extensive material options: Select from our diverse high-performance materials to meet your specified requirements.

Custom Injection Molding: An Overview

Custom injection molding or injection molding mold parts is a plastic part fabrication process that involves injecting stringent quality material into a mold die or cavity designed specifically for intended applications. This process allows design manufacturers to produce parts in low volumes to bulk. Generally, it’s also known as injection molding of plastics, as this process is carried out in the following manner.

The process starts by forcing molten polymer into a mold designed to match the shape of the desired product. The polymer is then cooled and solidified to form the required part released from the mold. The custom injection-molded parts or products manufacturing process provides flexibility and can be used for medium production for about a few 100s to manufacture 1000s of identical molded components at a large scale. The process is widely favored for its economic production and helps industries like automotive, aerospace, and electronics to fabricate prototypes for functional testing and enhance the aesthetics of intended products or end-use parts.

injection molded parts

Custom Plastic Injection Molding Materials

The types of plastics used in custom injection molding are diverse, with different melting points and peculiar characteristics that can be adjusted to suit a specific application. Here are some commonly employed thermoplastic materials for manufacturing high-quality injection molded parts.

Acrylonitrile Butadiene Styrene (ABS) 

ABS is a widely used thermoplastic material that offers flexibility, low density, and good impact strength. It is unsuitable for applications requiring chemical, electrical, or UV resistance. Because of its strength,

ABS injection molding is widely used in products such as children’s toys, household appliances, and car parts.

Low Density Polyethylene (LDPE) & High Density Polyethylene (HDPE)

These versatile thermoplastics provide high tensile and impact strength and resistance to moisture. HDPE injection molding is used in consumer and industrial products, while LDPE, which is softer, is also used in similar applications. Both materials are appreciated for their high degree of durability and ability to be bent.

Polycarbonate (PC) 

PC is a crystal clear, high-gloss matte, lightweight, and yet strong substitute for glass. It is highly resistant and has high impact and mechanical strength, PC injection molding parts aer good  ideal for use in applications like bulletproof glass.

Polyamide (Nylon) 

Nylon injection molding part is a popular thermoplastic known for its electrical properties, mechanical strength, heat, wear, and chemical resistance. Because of its durability and high functional performance, it is commonly used in the medical and automotive industries for injection molded mold parts.

High Impact Polystyrene (HIPS) 

HIPS is an inexpensive, impact-modified crystalline styrene-rubber copolymer widely used in producing disposable cutlery and toys. It is non-toxic, suitable for use in food-contact applications, and appreciated for its flexibility and low price.

Polypropylene (PP) 

PP injection molding part is a tough plastic with good chemical and stress resistance and high impact strength. Due to its high melting point, it is ideal for use in the food industry, where equipment must be durable and safe for use with food products.

These materials are chosen according to the application’s needs to provide the best performance and long life of custom injection-molded parts.

Tool Design and Engineering

In injection molding, the tool is the mold or die that forms the material into the intended part. It’s in fact a negative cavity that recreates the part’s shape with the correct dimensions to allow for the material to behave as desired during injection and cooling. In the production of custom molded plastic parts, it may be necessary to use one or several tools depending on the need. Although using more tools initially raises the cost a little, it greatly reduces the cost per piece in the long run, making it economical for mass production.

These tools are located in a mold base and are a single component of injection molding machines. Mold bases are costly, so we use insert tooling that can be fitted into existing polymer molding mold bases.

Our real engineers consider the details by analyzing DFM analysis to material, and technique selection when creating custom-molded plastic components, including tool design and process optimization. They incorporate the right manifold and runner systems, molding processes, and functionalities without extraneous features, thus cutting costs on your budget. The high-tech software helps uniformly transition from virtual technical 2D or 3D g-code to m-codes to accurate tooling in the tool room.

Tool Building

Sincere Tech has a functional tool building and mold maintenance department with experienced professional tool makers. By selecting the right steel grade tool to correspond to the particular process, our skilled engineers and manufacturers create and design accurate tools to meet the required standard. We employ CNC machines, precision optical laser engraving machines, laser and tig welders, EDM, heat treating, grinding, polishing, and plating capabilities, which allow us to build and sustain tools for maximum performance.

Lean Molding

Our on-site production unit uses advanced feature machines and presses which offer high-speed production and fast tooling changeovers for every batch. These standard, efficient machines, manufacture millions of molded plastic parts daily with quality, and low cost.

Tool Maintenance

Our value-added customer services ensure rigorous quality for your custom tools during manufacturing. Our mold changeover department cleans and inspects tools regularly after every use, re-plating or repairing them where necessary before storing them for use in the next production cycle.

Benefits of Custom Injection Molded parts

Custom injection molded aprt is a flexible manufacturing process that is suitable for creating intricate parts with small dimensions and strict specifications. It is suitable for high-volume production of identical parts, which makes it an economical solution. It is relatively faster and more effective than other plastic forming techniques such as machining or additive manufacturing. In addition, it has a high degree of design freedom, which means it is possible to shape and produce parts of different shapes, sizes, and colors. Depending on the desired rigidity and ductility of the end product, the materials can be polypropylene and ABS, nylon, and polycarbonate, thus meeting the requirements of a particular application.

plastic injection molding parts

Who Should Use Custom Injection Molded parts

Custom injection molding is the most suitable for companies that want to produce complex parts, whether in large or small quantities. This process benefits industries like the automotive, electronics, and medical sectors, where customized components are required quickly and accurately.

Custom injection molding is a versatile process that can produce intricate detailed parts in a short time frame, ranging from hours to days, depending on the complexity and size of the part. This is particularly useful for creating a prototype and transitioning to mass production in a short turnaround.

In the context of cost, custom injection molding is more advantageous than traditional machining or 3D printing if the part design meets the requirements of injection molding. In addition, the parts produced by injection molding are of better quality and uniform surface finish than those produced by machining.

Customers also benefit from shorter lead times and a wide range of materials, including thermoplastics such as ABS, polypropylene, nylon, and PEEK. This versatility guarantees that the final product is produced to the required standards and performance characteristics.

Our Expanded Customers’ Support Services

Sincere Tech molding holds an ISO 9001:2015 certification, which proves our dedication to quality control and assurance.

Adherence to ISO standards guarantees our services have the best business processes and quality management systems to meet the needs of its customers and provide high levels of satisfaction.

Our quality department utilizes state-of-the-art technology, a four-step inspection system, and Statistical Process Control (SPC) to guarantee compliance throughout the manufacturing process. By using advanced measuring instruments that obtain specific measurement values instead of relying on the naked eye, we guarantee that the dimensions are uniform regardless of the complicated designs to ensure parts meet exact dimensions and specifications. This approach does not only increase efficiency but also allows for more frequent and accurate inspections.

It starts from mold setup to production runs, and our quality assurance process is very strict. The first parts after mold setup are inspected to ensure the product is of the right quality before proceeding with the production process. During production, the machine operators are responsible for the visual inspection of the products and during production, the in-process inspectors conduct the visual, dimensional and functional inspection periodically. The last step before packaging is a visual check to confirm the labels’ quality, quantity, and correctness.

Statistical Process Control (SPC) enables us to control quality by collecting and analyzing statistical data from processes, product measurements, and machines. This approach enables us to improve efficiency, increase productivity, and reduce the likelihood of producing off-standard products and scrap, thus reducing the cost to our customers.

At Dong Guan Sincere Tech, we understand the importance of product quality. Our experienced professional team of engineers is always available to help with certifications and reports such as PPAP, ISIR, FAIR, IMDS, Reach, RoHS, and others.

Our company is one of the leading plastic injection molding companies in China, specializing in custom plastic injection molding and delivering billions of high-quality parts and components to numerous industries. Furthermore, Our facility offers a wide range of injection molding molds, and we are one of the largest family-owned plastic injection molders in the country.

With a wealth of knowledge and experience, our company offers comprehensive capabilities that span from concept to completion: With engineering speciality of knowledge and experience, we offer comprehensive capabilities that span from concept to completion:

Design Expertise: We have a highly experienced design team with over 30 years of experience in the industry. We use the latest technology, such as Solid Works, to design and modify molds. We pay special attention to the specifics of the part’s operation and the conditions necessary for it to work as designed.

Comprehensive Approach: We pride ourselves on taking a comprehensive approach to the manufacturing process, starting with the mold design and ending with the injection molding process. This concept-to-completion approach guarantees the highest quality from the design stage to the final product, incorporating practical and technical knowledge of plastic injection molding.

Toolmaking and Precision Tooling: Creating effective tools is not easy; it takes time, effort, and focus. Our company is dedicated to providing you with precision tooling that will ensure the success of your project. Advantages include a warranty on our tools, high-quality tools that ensure tight tolerances and optimized cycle time, and the ability to mold parts with varying wall thickness and complex geometries. Although we focus on small parts, we can handle up to 10” square sizes.

Injection mold China

We have a state-of-the-art factory with 125 fully automated presses that run seven days a week, 24 hours a day, almost the whole year.

Facility and Equipment: Both presses come equipped with self-diagnostic and microprocessor-controlled functions, and the clamping forces range from 46 to 720 tons and fractional to 107 ounces. We also have a Class 8 cleanroom environment that can be modified to fit different projects depending on the client’s needs. This is especially beneficial for the pharmaceutical, medical, food, and beverage sectors and others requiring high safety measures.

Automation and Inventory Management: Sincere Tech keeps safety stock to meet unexpected client demand. Our real-time inventory tracking helps forecast future requirements, and we have a robust MRP system that monitors jobs from end to end. Our understanding of the properties of the resin, the demand for the part, and the cycle time helps us achieve a 99% customer satisfaction rating.

Choose Sincere Tech Group for Your Next Injection Molding Project

The Sincere Tech is one of top 10 mold manufacturers in China that offers custom plastic injection molding services. Our certifications in ISO 9001:2015 and ISO 13485 ensure the highest quality, and our broad expertise addresses various fields. Our team provides the best solution if you need high-accuracy components or components with small tolerances. Contact us today to learn more about our state-of-the-art plastic injection molding solutions. Get a quote to work on your next custom injection molding project, and let us meet your desired requirements without compromising premier standards.

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