Tag Archive for: Custom Plastic Mold

EDM Machining: Electrical Discharge Machining, Spark Machining / Eroding, Metal 3-D Geometry, Accurate Repeatability, Intricate Detail, Sharp Corners, Patterns

Electrical Discharge Machining (EDM) from SINCERE TECH provides CNC (computer numerical control) accuracy for creating 3-D geometry in hardened steel and other metals like brass, copper, and aluminum. It can be used to create simple or complex shapes. SINCERE TECH has 11 EDM machines, one AgieCharmilles EDM machine and one Sodick EDM machine for mirror surface EDM machining, two double heads EDM machines for high-efficiency EDM machining requirement

The EDM process is an excellent solution when a high degree of accuracy, and/or repeatability, is required.

Electrical Discharge Machining

EDM: What It Is and What It Does

Sometimes referred to as spark machining or spark eroding, EDM is a method of removing material by a series of electric discharges using copper electrodes or Graphite electrodes, rapidly arcing between an electrode acting as the cutting tool and the workpiece, in the presence of a dielectric fluid.

EDM is used to burn material away from the metal mold component, to add:

  • Intricate detail
  • Sharp corners
  • Patterns

The EDM cutting tool is computer-guided along the desired path very close to the work but does not come in physical contact with the piece, preventing plastic injection tooling marks.

A continuous sparking action produces a series of micro-craters on the workpiece and removes excess material by melting and vaporization. The particles are then washed away by a continuous stream of dielectric fluid.

EDM Services: SINCERE TECH Provides Quality Results and fast service for your plastic injection mold

SINCERE TECH’s EDM services can give your design potential a boost. You will be able to place intricate designs and logos in a wide variety of components with top quality results. This process can be used to produce:EDM service

  • Faceplates
  • Nameplates
  • Bezels
  • Buttons
  • Switches
  • Gears
  • And much more!

EDM can also be used in fabrication, for tapping holes into parts, and similar procedures.

If you are looking for a plastic mold supplier that offer you fast delivery, high gloss plastic molding parts, texture surface plastic mold, and all other custom plastic injection tooling or molded parts, you are welcome to send us your requirement, we will offer you the best price and quality.

What is Plastic Packaging Containers

Plastic packaging containers are containers that are used to hold something; whether that be food, clothing, or anything else; that are made out of plastic. Many companies use different plastic packaging containers, such as pharmaceutical companies. the food industry, the healthcare industry, the pet industry, and many others.Custom Plastic Packaging Containers

Plastic packaging containers can be found at most stores you shop at, but what about custom plastic packaging containers? Where would you find an odd-shaped container that you need for a specific project? What if you need 1000 of that same odd-shaped container for your business? Do you want your company logo on those containers? There are many aspects to look at when choosing containers, depending on what you are looking for. For example, if you are looking for clear plastic packaging containers for food, you wouldn’t want containers that contain BPA. go to custom plastic food storage containers pageto know more information.

Step to order your own Plastic Packaging Containers

The first step in ordering your custom plastic packaging containers would be to determine the size and shape of the container that you need. If you need a smaller container, or a basic plastic mold then you are looking at spending less money. Whereas if you are wanting a plastic packaging container in an odd shape, you will be spending a little more.
Next, you would determine what quality of plastic you need the containers to be. You would need to look at different aspects for this, such as what products are going in the containers, how the custom plastic packaging containers are going to be stored, and what climate the containers will be stored in. This is an important step because you don’t want to order a container that is not going to fit your specific needs.
After you have determined the size, shape, and quality of your plastic packaging container, you will need to decide what you want the product to look like. This means deciding whether you want custom colors or extra design. Then, you will need to determine how many containers you need. If you need the containers for a wedding, for example, you wouldn’t need as many as you would for a business that needs containers for a product. all of those process we called part design and delvelopment.
In addition, you would determine how quickly you need the product. If you need a custom product as soon as possible, you would want to look at companies with in house engineers, that are located in your country. However, if you can wait some time, you could be saving money if you went for a larger manufacture overseas, like finf a plastic molding company to handle your custom plastic mold and massive products production.
Furthermore, you will need to decide whether you need a label on the containers. This is a pretty simple step, but if it’s missed, you could end up with thousands of containers that were ordered incorrectly.
Finally, you would choose the business that you want to order from, let them know your vision, and wait for your arrival. Choosing a business can be a difficult decision, and can be time consuming because you don’t want to make a mistake when mass producing something important. As long as you follow these steps, you are headed in the right direction to getting the custom plastic packaging containers you need.

Sincere Tech, we are one of the top 10 best leading plastic mold companies in China. We offer wide range of custom Plastic Packaging Containers, die casting molds, metal parts, CNC machining and mold components. Through ongoing investments in research and development, we deliver cutting-edge solutions that address the evolving needs of our customers. As one of the best injection mold suppliers in China, we pride ourselves on our commitment to excellence.

Quality is of the most importance to us, to make sure we make high quality molds, we will use CMM measuring machine to measure all of mold components, electrodes, and all of final molding parts, to make sure all of dimensions are under the tolerance, We will test the function of parts, materials to make sure that the final part will meet your requirements.

When you partner with Sincere Tech as your preferred China mold maker, you can expect the highest level of professionalism, expertise, and innovation. We are dedicated to helping you bring your ideas to life, delivering superior products that excel in performance, durability, and cost-effectiveness.

Our expanded capabilities include:

  1. Rapid Prototyping: We offer rapid prototyping services (3D printing or CNC machining prototypes) to quickly transform your rough design into useable prototypes, and testing, redesign suggestion etc.
  2. Precision CNC machining: Our advanced CNC machines enable us to create high-quality mold components with tight tolerances, this will ensure currently tolerance and precision in the injection-molded products.
  3. Overmolding: We make overmolding for some handle tools, some of overmoling are used in the die casting molds as well, contact for quote for your overmolding project.
  4. Insert Molding: insert molding is similar to overmolding but will be little different, insert molding normally use metal parts as substrate and overmolding use plastic part as substrate.
  5. Two-Shot Molding: With two-shot molding, we can produce complex, multi-material components in a single operation, reducing assembly requirements and enhancing design possibilities. Two shot molding is more complex than insert molding or overmolding, and two shot molding requires two shot injection molding machine.
  6. Value-Added Services: In addition to injection molding, die casting, and machining, we offer a range of value-added services, including product silk-screen, painting, assembly, testing, certificate, packaging, and logistics support, streamlining your supply chain and reducing costs.

Partner with Sincere Tech China mold maker for your custom Plastic Packaging Containers, die casting and machining needs, we will offer you the best quality and fast lead time, contact us for quote in 24 hours.

hdpe injection molding

China Custom Plastic Injection Molding Service – Affordable Custom Parts

Sincere Tech is a well-established custom plastic injection molding company in China that provides high-quality custom tooling and molding solutions. We provide solutions for manufacturing services such as raw material testing, tool manufacturing, molding, surface finishing, and product testing to suit the various needs of customers. Our team of engineers is highly qualified and can ensure the professional execution of orders of any size and complexity.

Our Custom Plastic Injection Molding Services Include:

Custom Rapid Prototype Tooling and Low Volume Injection Molding.

  • Perfect for prototyping or creating a few pieces of the product at a time.
  • They can range from simple machines capable of producing between 50 to 5,000+ parts.

Custom Bridge Tooling and Medium Volume Rapid Injection Molding

  • Ideal for market entry strategies.
  • Manufactures 5000 to 100000+ components.

Custom Production Tooling and High Volume injection Molding.

  • It was created for the mass production of bicycles.
  • Produces 100,000+ parts.

With over a decade of experience in On-demand manufacturing solutions, we have helped many of our customers produce their parts using custom plastic injection molding. We are excited to work with you and bring your products to life accurately and quickly.

custom plastic injection molding China

What is Custom Plastic Injection Molding?

Custom Plastic Injection molding is an efficient process of manufacturing custom plastic parts in any quantity, small, medium, or large. This involves the use of molds where the molten plastic material is poured and allowed to cool and harden to the required shape. This cycle is repeated hundreds or even thousands of times, which enables the production of several custom plastic parts at once. The cost of the custom mold is distributed over the number of parts manufactured, which makes the price per unit only a few $$s or even less. Custom plastic injection molding guarantees uniformity of the parts produced and has more material, color, cosmetic, polish, and surface finishing possibilities than 3D printing or CNC machining.

Sincere Tech is a specialized custom plastic injection molding company that provides prototypes and short-run and volume-run custom molding services. We offer custom plastic parts that meet your exact design requirements while being affordable. Our professional engineering department consults with every injection molding quote offered to customers to facilitate an easy transition from design to production.

Types of Custom Injection Molding Services at Sincere Tech

Sincere Tech is a prestigious custom plastic injection molding services company in China that specializes in providing different types of molding services for low to high-volume production requirements. Here’s a brief overview of the types of injection molding services we provide:

1. Custom Clear Injection Molding

Process: This is a process that involves the use of plastic materials that are transparent to produce parts that need to be precise or semi-clear.

Applications: Suitable for products such as lenses, light covers, and other translucent parts.

Normal material: PC, PMMA, PS, ABS, etc.

2. Custom Insert Molding

Process: Insert molding is a technique in which metal or other parts are placed inside the plastic during injection molding.

Applications: Typically used for manufacturing components with metallic inserts, including threaded bolts, bearings, or electrical contacts.

Normal material:  ABS, PC,PP,PA66, PMMA, PE, PET, PPT, etc

3. Custom Over Molding

Process: Overmolding is a two-shot process in which a second material is molded over an existing part or base material.

Applications: Ideal for manufacturing components made of several materials, for instance, handles with soft grips or cases with seals.

Normal materials: TPE, TPU, ect.

4. Custom Thread Molding

Process: This technique involves the formation of internal or external threads in the molded plastic part without the need for subsequent screw cutting.

Applications: Applicable to parts that require screwing or joining, for instance, caps, closures, and threaded inserts.

Normal material:  ABS, PC,PP,PA66, PMMA, PE, PET, PPS, etc

5. Custom Rubber Molding

Process: Rubber molding entails using elastomers to create flexible, strong parts and components.

Applications: It is recommended for use in gaskets, seals, o-rings, and other components that need to be flexible and have high recoverable elasticity.

Normal material: Rubber.

6. Custom Silicone Rubber Molding

Process: Silicone rubber molding uses silicone to create parts that are thermally stable and able to withstand weathering.

Applications: Applicable for use in medical devices, kitchenware, seals, and gaskets.

Normal material:  Silicone, rubber.

Our technical experts are committed to delivering the best molding services that meet your precise needs. From prototypes to short runs and total production runs, our team of engineers will help make your project successful. Explore China’s best custom injection molding services today, or discuss your injection molding requirements directly with our representative.

China Mould Maker

Customized Injection Molding Costs

The price of customized injection molding is not standard and depends on how you engage our services and your project specifications. Generally, the cost can be broken down into two main components: the total cost of production and the price of the mold or the tools that are used in the production process.

Tooling Cost/Injection Mold Cost/Rapid Tooling Cost

Making the custom mold entails other costs that are not included in the total cost of production. The custom mold cost is paid at the beginning of the injection molding process and depends on the blueprint design of the mold. The time it takes to create a mold depends on the mold’s design and its intricacy. Plastic parts production is initiated only after the mold has been made or finalized. There are two types of manufacturing processes for mold creation: rapid manufacturing and conventional manufacturing, with different prices and production approaches.

If you want to know more about custom mold cost, pleae go to injection molding cost and how much does an injection mold cost page to know more.

Key Factors Influencing Customized Injection Molding Cost

The following steps are involved in customizing injection molding molds.

Design Blueprint and Complexity

The level of preparedness and the level of complexity of the product design is a key factor that influences the costs. The complex designs require more complex molds and take more time to make.

Raw Materials

The cost is determined by the type and quality of the material used on both the plastic products and the mold. In general, it can be stated that the acquisition of higher-grade materials is more costly than that of lower-grade ones.

Manufacturing Technology

The choice between rapid manufacturing and traditional manufacturing technologies is based on cost. Although rapid manufacturing is faster, it is expensive.

Tooling Process

The following are some of the factors that can be associated with the tooling cost: the design of the mold, its features, and the material used to construct it.

Project Requirements

The cost may also be affected by schedules and certain specifications of the project. This may force the client to order rush services which are usually costly.

Additional Processes

Other operations such as branding, pad printing or any other special operations will also add to the price.

The cost of injection molding is determined by the design of the product, the quality of the material used, the technology used in production, and other factors of the project. At Sincere Tech, we offer tailor-made solutions to your needs, whether it is a one-off or a batch run. For more information and to get an online quote for your project, please do not hesitate to contact us.

custom plastic injection molding services

Custom Plastic Injection Molding Method

Custom plastic injection molding entails the use of injection molds, and the quality of the final products depends on the molds and their design. In addition to the molds, technical know-how and experience are crucial in arriving at the structure and design of the injection products and the molds.

Mold-making is one of the core departments in our company, equipped with the most modern tools and employing highly qualified and scientifically oriented staff. This makes it possible for us to have good quality molds and also makes it possible to offer the molds at an affordable possible price and within the shortest time possible.

We also provide technical consulting services for selecting appropriate plastic materials for products. When our customers use large plastic molds for their products, they can benefit from our experience in different engineering plastics. We deal with all types of engineered plastics, including conventional plastics and high-performance thermoplastics, to ensure that we select the right material for the particular application.

Our competencies include all types of large plastic molds and materials, and it has been realized to incorporate high-performance thermoplastics into the large plastic molding.

In addition to the general categories of thermoplastic injection molding services available today, our company provides several particular injection molding services to meet our client’s requirements. These are specific processes designed for specific uses, needs, and problems.

Thermoplastics Materials We Processed

At our In-house set-up, we process the following custom injection molded plastics;

ABS (Acrylonitrile Butadiene Styrene)

ABS is a general-purpose thermoplastic with good impact strength and a high degree of hardness. Its tensile yield strength is 6,500 psi, suitable for many engineering applications that demand strength and durability. Go to ABS injection molding to know more.

Polypropylene (PP)

Polypropylene is a thermoplastic polymer widely used in many applications because of its flexibility and strength. It has a tensile yield strength of 4,900 psi and is used where good chemical resistance and processability are needed. Go to PP injection molding to know more.

Polyoxymethylene (POM):

POM, also known as acetal, is a thermoplastic material with low friction, high stiffness, and good dimensional stability. With a tensile yield strength of 10,000 psi, it is suitable for applications that require high accuracy and mechanical strength of the parts. Go to POM injection molding to know more.


Polycarbonate is a thermoplastic polymer with high heat resistance and impact resistance. It has a tensile yield strength of 9000 psi and is used in applications that demand clarity and strength like eyeglasses and electronics. Go to Polycarbonate injection molding to know more about PC molding.

Polycarbonate/ABS Blend:

This is a combination of polycarbonate and ABS that results in the formation of strong and durable parts. It has a tensile yield strength of 8000 psi and is mainly used in automotive and electronic housing industries. Go to PC/ABS injection molding to know more.

PVC (Polyvinyl Chloride):

PVC is a polymer that has good electrical insulating property, high hardness, and good mechanical property. It has a tensile yield strength of 4,500 psi and this makes it suitable for use in many industries and construction activities.


Nylon is a strong polymer material with high elongation and relatively good wear resistance. It has a tensile yield strength of 8,400 psi and is applied to gears, bearings, and wear-resistant components. Go to Nylon injection molding to know more.

Nylon 30% Glass Fiber:

This nylon composite has enhanced mechanical strength and thermal stability, and the tensile yield strength is 18,000 psi. It is applied in areas where high strength and stiffness of the structure are required. Go to Glass filled Nylon injection molding to know more.

Acrylic (PMMA):

Acrylic is quite popular for its strength, which makes it ideal for use in areas likely to be exposed to pressure. It is commonly used in applications that need to be transparent. It has a tensile yield strength of 9400 psi and is used for lenses, displays, and light guides. Go to PMMA plastic injection molding to check more.


Styrene is another type of plastic that is lightweight and has high impact strength and toughness. It has a tensile yield strength of 6,530 psi and is employed for packaging, disposable cutlery, and modeling.

Polyether Imide (PEI):

PEI is a thermoplastic with high temperature tolerance and good mechanical properties. Its tensile yield strength of 16,000 psi makes it suitable for aerospace, automotive, and medical applications.

custom plastic injection molding

Quality Assurance & Surface Finishing Options For Custom Injection Molded Parts

At Sincere Tech, we know how vital it is to produce high-quality and accurately shaped custom molded parts. When you request an injection molding quote, we provide a variety of quality inspections and finishing options depending on your application’s needs.

  • Designing for Manufacturability Feedback (DFM): Our specialists give detailed comments on your design to make sure that your product is suitable for manufacturing without possible problems, which could slow down the process.
  • Scientific Molding Process Development Report: Our scientific molding reports cover the development process and guarantee that the mold will perform as intended and that the quality of the parts will not deteriorate over time.
  • In-Process CMM Inspection and Machine Monitoring: Our CMM checks and real-time monitoring of the machines ensure that the molding process is accurate and high-quality.
  • First Article Inspection (FAI) and Process Capability Report with GD&T: Our FAI and process capability reports, inclusive of GD&T, assure you that the first set of molded parts meets all the required standards and tolerances.

Wrapping Up

In conclusion, it’s economical and effective to get custom plastic molded parts made in China. China is a preferred destination for manufacturing high-quality plastic components because of its skilled workforce, competitive prices, and advanced manufacturing capabilities. Understanding the factors we have discussed and using the tips for collaboration, you can successfully apply the potential of custom plastic injection molding china industry to introduce new developments and high quality in your production.


Q1. What is Plastic Injection Molding?

Injection molding is a manufacturing process that involves using injection to force molten material into a mold. The plastic cools and hardens into the intended shape; each round is known as a molding cycle or molding shot.

Q2. How Much Does Plastic Injection Molding Cost?

The cost of injection molding varies from $100 to over $ 100,000. The cost factors that are considered include the type of material used, size of the part, quantity ordered, complexity of the part, number of cavities, cycle time, and labor costs.

Q3. How Much Does Injection Molds Cost?

Injection Mold Cost varies depending on the complexity of the mold and the material used in its construction. Injection Mold costs are estimated to be between $1,000 and $100,000+ or even more. The cost of molds is also influenced by the complexity of the mold and its size, where simple and small molds are cheaper than complex and large molds with multiple cavities and features.

high volume plastic injection molding

Custom Plastic Molding

Custom Plastic molding is one of the most cost-effective processes for producing large quantities of plastic products. It uses a die or mold in which melted plastic is injected under pressure, cooled, and hardened to produce the final part before being released. This cycle can be repeated very quickly, possibly 1000 times, which distributes the initial cost of the mold over a large number of units, making the cost per part a few dollars or less. Repeatability and reliability are achieved because a single mold can be used to produce each part. Furthermore, injection molding provides flexibility in terms of a broad range of material options, colors, finishes, and surface treatments that cannot be matched by CNC machining or 3D printing.

Sincere Tech has a highly skilled workforce with years of experience in different sectors, like medical injection molding and LSR molding. New customers are also given a $500 credit on their first mold with Sincere Tech. We have choices for domestic and custom plastic molding company services from a broader prospect.

custom plastic molding

Types of Custom Injection Molding Techniques

In designing plastic products and their components, it is critical to choose the correct manufacturing process to obtain a high-quality and durable final product with acceptable costs and production time. Here are the most commonly used techniques of custom injection molding;

Thermoforming involves heating a large sheet of plastic to make it pliable and then forming it over a one-sided mold. The use of vacuum pressure or compressed air to force the thermoplastic closely against the mold to the required shape. The advantages of thermoforming are the low cost of tooling, the short time to market, and the ability to produce large parts such as bathtubs and car dashboards. Also, thermoforming is fast in prototyping and can be customized to a great extent.

Extrusion molding is mainly applied to produce long and straight products such as tubes, hoses, or pipes. This method involves the use of pressure to force liquid plastic into a specific shape of a die. Although round shapes are typical, t-shapes, l-shapes, and squares are also possible due to the die’s shape. The advantages of extrusion molding are the low cost of tooling and machinery, little or no need for finishing other than cutting the pieces to the required length, and the possibility of attaining intricate and uniform cross-sectional shapes.

Compression molding is most commonly applied with thermosetting plastics, which, when heated and then cooled, undergo a chemical change to become a rigid solid. In this method, the plastic resin is melted and formed into a putty-like substance and then put into a hot mold. The putty is then compacted by the mold and left to cool. Compression molding is suitable for making plastics that compete with metals, are suitable for rigid lightweight thermosets, and are commonly used in fiberglass reinforced or rubberized plastics.

Blow molding is similar to injection molding, where the plastic is first melted and then injected into the mold. Air is then pumped into the plastic, making it expand and conform to the shape of the mold walls. Blow molding is most suitable for manufacturing items that are thin-walled and have a hollow structure, like water bottles or 2-liter bottles for sodas. This method is fast and is relatively cheaper when large quantities are being produced.

Rotational molding, or “roto-molding,” is the process of placing a mold into a heated container of liquid polymer and then spinning the mold rapidly. This process covers the plastic uniformly on the walls of the heated metal mold while the interior remains empty. Rotational molding is mainly applied to large, hollow-partitioned containers, storage bins, and even kayaks. The advantages of this method include low setup costs, constant thickness of the walls, and low cost for very small or short runs.

The six manufacturing methods of plastics are as follows: By knowing these six manufacturing methods of plastics it will assist manufacturing companies in choosing the best method that will produce the required durability, quality, cost, and efficiency of the products.

custom plastic molding company

Custom Molding Plastic Materials

Custom plastic mold uses engineered grade custom molded plastics to design intricate patterns or part designs. Some common types include;

ABS, or acrylonitrile butadiene styrene, is a strong plastic that is used in many market goods. A lot of people know this material for how well it resists wear and shock. It is often found in car parts and home items.

ASA stands for acrylonitrile styrene acrylate. It is like ABS, but it is more resistant to UV light, so it can be used outside. It doesn’t fade or wear out quickly. This material is often used in cars and outdoor furniture.

Calcinedioacetate, or CA, is a clear material that can be bent and is used in films and glasses. For uses that come into touch with food, it is safe. It looks shiny and can hold its shape well when pulled apart.

HDPE, which stands for “high-density polyethylene,” is strong for its weight and doesn’t react with chemicals. It’s used for many things, like fuel tanks, food bins, and playground equipment outside. Strong and resistant to the weather.

It has a great mechanical strength even at high temperatures. It is called LCP (liquid crystal polymer). Micromolding and parts with thin walls are both possible. It is used in medical products and electrical connectors.

LDPE, or low-density polyethylene, is a strong material that can be used for many things and doesn’t react with acids, bases, or alcohol. Used in snap lids, trays, and other general-purpose cases. Offers good resistance to force.

PA 6 (polyamide 6, nylon 6) is known for being stiff and strong on a technical level. It resists heat and chemicals well. Used in industry and automotive parts.

PA 6/6, also known as polyamide 6/6 or nylon 6/6, is similar to PA 6 but has better mechanical qualities. Better at keeping heat in. Used a lot in places where there is a lot of stress, like gears and bearings.

Polyarylamide, or PARA, is often backed with glass or mineral fibers to make it hard. You can use it to make structural parts because it doesn’t creep or soak up water. Used for medical and travel purposes.

Polybutylene terephthalate, or PBT, is a type of plastic made from polyester that is used to keep electronics safe. Often used as an alternative to nylon in car parts because it doesn’t wear down as quickly. Offers good stability in terms of size.

Polybutylene terephthalate (PBT) and polyethylene terephthalate (PET) are two materials that work well together to make things stronger and more resistant to chemicals. Used in situations where the ability will be needed for a long time. Seen in the production of car and electronic parts.

PC, or polycarbonate, is a type of polymer that is very light and doesn’t break easily when hit. It is often used in safety gear and glasses. This item has great sharpness and lasts a very long time. Widely used in many fields for tasks that need to be very strong.

PC-ABS, which stands for polycarbonate-acrylonitrile butadiene styrene, is a mix of PC, which is stiff, and ABS, which is flexible. Strong enough for technical tasks that need to be done. Used in the electronics and auto businesses.

PC-PBT (polycarbonate-polybutylene terephthalate, Xenoy): Can’t be damaged by chemicals or lubricants used in the housing of electronics. Offers strength and stiffness. Often used in industrial settings.

PC-PET, which stands for polycarbonate-polyethylene terephthalate, is a material that is strong and resistant to poisons. Strong cleaners and chemicals won’t work on it. utilised in the creation of sporting items and medical gear.

Polycyclohexylenedimethylene terephthalate (PCT): It absorbs water better and is more stable in the environment than PET. It is often used in switches and links. Suitable for applications that need great performance.

PE (polyethylene): It can be shaped very easily and is resistant to chemicals and wear. Used in tubes, films, bottles, and other packaging products. It has different grades, like UHMW, LDPE, and HDPE.

PEEK, which stands for polyether ether ketone, is very strong when pulled apart and doesn’t melt at high temperatures. In high-stress situations, it is sometimes used instead of metal. It is used in medical and aircraft settings.

Polyetherimide, or PEI, is used a lot because it can handle high temperatures and flames. A cheap material that can be used instead of PEEK in medical settings. Offers good stability in terms of size.

Polyethylene-polypropylene, or PE-PP, is a blend made up of polyethylene and polypropylene that has properties of both. Used in a variety of general-purpose situations. Chemical protection is good.

Polyethylene-polystyrene (PE-PS) is a material that has the qualities of both polyethylene and polystyrene. Suitable for a wide range of uses. combines being flexible and stiff.

Plastic called polyethersulfone (PES) is clear, hard, and doesn’t mix with chemicals or heat. It can also be sterilized. Used in the aerospace and food processing equipment businesses. It is often used in situations where great performance is needed in harsh conditions.

PET (polyethylene terephthalate, Rynite): It’s usually tough, clear, and light, and it’s used to make food wrappers and drink bottles. With a plastic code of 1, it can be recycled. It works well as a shield.

PLA, or polylactic acid, is a plastic that is good for the climate, can be recycled, and has a low glass transition temperature. Often used in short-term situations. Compostable and good for the environment.

PMMA, also known as acrylic or polymethyl methacrylate, is a clear plastic that looks like glass and wears well. Great for using outside. For example, in displays, signs, and glass.

Acetal polyoxymethylene, or POM, is a material that doesn’t absorb water and doesn’t stick to things easily. A great choice for precise parts. Used in bearings, gears, and other industrial parts.

Polypropylene (PP): It’s good at conducting electricity and staying stable in chemicals. Low ability to absorb water. It is used in textiles, car parts, and packaging.

Polyphthalamide, or PPA, is a type of nylon that has a relatively higher melting point and a relatively lower ability to absorb water. It can be used in both cars and factories. Useful for devices that distribute fuel and fluids.

Polyphenylene sulphide, or PPS, is a high-tech thermoplastic that is very resistant to acids. Found in the electronics and auto businesses. It’s very resistant to heat.

PS (polystyrene) is clear, stiff, and easy to break. It is often used to make food wrap and single-use items. It doesn’t cost much and is easy to make. Often found in shopping goods.

Noryl is made of PS-PPE, which is polystyrene-polyphenyl ether. It is also very resistant to heat and flame. Good hardness and tensile strength at high temperatures. Used in the auto and electrical businesses.

Polysulfone (PSU) is stylish, hard, and clear. It’s a better choice than polycarbonate and works better. Used in the production of medical gear and tools for moving food. Chemical protection is good.

Polyvinyl chloride (Shore D) or PVC is a hard, mass-produced plastic that is used to make pipes and things that don’t last long, like food wrap. Long-lasting and useful. Used in the automotive and building industries.

PVDF (polyvinylidene fluoride, also known as Kynar): Doesn’t mix with anything and can handle high temperatures. Used to make plumbing parts, electrical insulation, and chemicals. It doesn’t stick to things well and doesn’t last long.

SAN stands for styrene acrylonitrile. It is clear, doesn’t melt in the heat, and is cheap. Kitchen tools, plates, and other things used around the house have it. It makes the gloss and clarity better.

custom molding plastic

Elastomeric Injection Molded Materials

Elastomeric parts can also be processed through the injection molding process, transfer molding, and compression molding. Some common types include;

EPDM (ethylene propylene diene monomer rubber): EPDM is widely used due to its high heat and chemical resistance. Some common uses include in automotive seals, gaskets, O-rings, and electrical insulators.

PEBA (polyether block amide): PEBA is soft and flexible and widely used in the construction of medical instruments such as catheters. PEBA foams are used for padding, shoe insoles, and sports equipment because of their moisture and UV resistance.

PVC (polyvinyl chloride, Shore A): PVC is an elastic thermoset that is a resilient material, and is often used in products for outdoor use, protective coatings, and mats. It needs plasticizers to make it flexible and is famous for its flame resistance.

TPE (thermoplastic elastomer): TPEs are a group of elastomers that possess the characteristics of thermosets but with the processing ability of thermoplastics. They encompass a broad spectrum of special elastomer categories.

LSR (liquid silicone rubber): These are used in foods and biomedical applications due to their heat, biocompatibility, and flexibility. LSR is applied in medical devices, automotive, aerospace, and consumer products, and it is processed differently from injection molding.

Custom Plastic Molding Surface Finishing Options

Standard Finish: This finish, usually SPI B-2, is selected by the mold maker depending on the part’s shape and the angles of the parting line. It is often applied to non-aesthetic parts, and the parts are left machined for functionality without extra expense or time.

SPI Finishes: These are the standard surface finishes set by the Society of the Plastics Industry that dictate the feel and look of the molded parts. They assist in meeting certain aesthetic and functional objectives, which makes them suitable for many uses.

MoldTech Finishes: These are specialized texturing processes that put patterns or textures on the mold surface to improve the aesthetic and feel of the finished part. MoldTech finishes are applied to achieve specific looks and enhanced tactile feel or to mimic other materials such as wood or leather.

Other Textures – VDI: VDI textures are available in various forms, with varying degrees of roughness and appearance to meet certain design requirements. They are widely applied in industries where the surface finish is a critical factor in the product’s functionality or aesthetics.

Design Tips For Custom Injection Molding

Undercuts: Reduce undercuts to make the tool ejection mechanisms easier and to avoid complications in manufacturing. The use of pass-through coring can also help achieve this goal while at the same time not compromising on the costs of production.


Wall Thickness: Ensure that the thickness of the wall is constant so that there will not be problems such as wall sinks and voids during molding. Reduced wall thickness is beneficial in the aspect of cycle time and cost of manufacturing.

Drafts: Make sure that the parts have a minimum draft angle of 0. 5° to 5° especially when molding textured faces, to ensure that the faces eject smoothly and free from molding defects.

Ribs/Gussets: Make the ribs to be 40-60% of the outer wall thickness while ensuring that the draft angles are correct for the structure. In this case, it is possible to achieve an increase in strength while maintaining the moldability of the gussets.

Bosses: Design bosses with a depth of 30% of the thickness of the wall and include a 30% edge recess for optimal performance.

Benefits & Applications of Custom Injection Molding

Injection Molded Part: The tooling is inexpensive, and the company can produce parts quickly, with delivery in as little as 10 business days at low prices.

Rapid Prototyping: Injection molding is a fast method of prototyping and can be used to test various designs within a short span.

Production Parts: Custom plastic molds are ideal for manufacturing a large number of production parts at high efficiency and low cost.

Range of Industries and Certifications: Injection molding is used in different fields and complies with the necessary standards to meet the needs of specific applications.

Stand Afirm With Sincere Tech For Your Custom Plastic Molding Project

In as much as custom plastic injection molding is concerned, Sincere Tech is one of top 10 plastic injection molding compnies in China. With ISO 9001:We have 2015 and ISO 13485 certifications, and this means that we value quality and precision in all the projects that we undertake. The extensive capabilities make it possible for us to work with many industries and provide high-quality injection-molded components with high precision.

Contact us today to find out more about our state-of-the-art plastic injection molding services. Whether it is prototype or production parts, Sincere Tech is dedicated to providing you with the parts you need in the best quality by offering stringent quality custom molded plastic materials and finishing solutions. So, do not wait to get a quote and become our partner in your next successful injection molding project.