Injection Molding

Zetwerk offers fast, reliable, and cost-effective injection molding services. Injection molding is a production process that uses pressure to force molten plastic into molds to create useful parts. Injection molded components are mass produced in various plastic materials. The number of parts can vary from a few thousand to millions depending on the tool type. Injection molded parts are used in a wide variety of industries, including automotive, consumer goods, and medical devices.

Injection molding can produce parts in a wide range of sizes and complexity. Small features, intricate geometries, and thin walls can be captured with ease using the injection molding process. Injection-molded components can be post-processed via various surface finishing options such as painting and texturing.

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Start Manufacturing Your Custom Injection-Molded Products

We manufacture custom injection-molded parts for our customers for a variety of applications. The typical lead time for manufacturing production tools is three to four weeks, after which we will send you a set of FAIR samples for your feedback and approval. Once the initial tooling is approved, we will start manufacturing custom parts tailored to your project's specifications.

Submit the relevant part drawings, 3D files, and other information by clicking on the button below. We'll make sure that it gets processed promptly, and that you receive a quote asap.

Zetwerk’s Custom Injection Molding: Fast, Reliable, Cost-Effective

Zetwerk ensures fast deliveries and short lead times for injection-molded parts and tooling. Zetwerk can work with a wide variety of resins, plastics, and composites depending on the application of the parts. We have a wide range of manufacturing presses, from low tonnage presses for molding small parts to machines up to 1,250 tons for the production of large parts. Zetwerk can also produce parts both in the single cavity and multi-cavity molds.

We have manufactured components ranging in size, weight, and volume. Currently, we produce parts ranging from a few grams to a few kilograms.

Zetwerk helps its customers with a wide range of secondary operations like bar code printing, pad printing, plastic welding, etc. The parts can be finished in a variety of surface finishes like matte or glossy depending on the application. We also provide packaging and assembly services for the injection-molded parts. This helps customers receive finished products which are ready to be dispatched.

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Zetwerk is ISO 9001:2015 and AS9100D certified. Our injection molding plants are IATF 16949:2016 and ISO 13485:2016 certified.



Injection molding material can be divided into two parts: engineering plastics and high-performance plastics. Engineering plastics have better engineering properties than most of the commonly used commodity plastics and are used across industries for a variety of applications. High performance plastics have improved temperature stability and mechanical properties even compared to engineering plastics and are necessary for a variety of specialized applications.

The type of material used in injection molding is dependent upon the application in which the material will be used. Injection molding is utilized in a variety of industries, including automotive, medical, and aerospace. The material used to create a particular product is dependent upon the application. Here are some of the most common injection molding materials:


Polypropylene offers durability, fatigue resistance, and elasticity. These properties make polypropylene an ideal choice for use in multiple applications in the automotive industry, among others.


Polyamide or nylon offers flexibility, durability, and strength. It has a high melting point and can be used in applications that require parts to remain exposed to high temperatures for long periods of time. Polyamide parts are used in a wide range of industries including medical and food & beverage.


LDPE is used in applications that require low temperature flexibility. LDPE can be formed into a variety of shapes seamlessly because of its properties. It can be used for a variety of applications that need lower temperatures like prosthetics, orthotics, etc.


PMMA offers transparent aesthetics, a superior strength compared to glass or other transparent materials, and is resistant to UV Rays. Because of these properties, PMMA is used widely in automotive, lighting, and other industries.


ABS is a versatile material that can be used on its own or combined with other materials, such as nylon or glass fiber. ABS is suitable for the production of small and large household appliances, electrical products, and other hard objects.


Polycarbonate is a transparent material with impressive strength and impact resistance. It also has a high melting point and is used in applications that require high temperature exposure and good strength.

Some other common materials that Zetwerk can provide parts in are:

  • HDPE
  • PS
  • PBT
  • PBS
  • POM
  • PEI
  • LCP
  • PPS

… and many more.


Zetwerk has a huge selection of specialty tools and molding capabilities that can be used to build complex products.

injection molded components

Insert Molding

Zetwerk manufactures many injection molded components that have metal parts like screws and bolts included inside the part. This eliminates the need for loose fasteners and also improves strength and application speed.

2K Molding

2K injection molding can be used for plastic parts that require two different colors or materials.

Three-Plate Construction (Stripper or RunnerPlate)

Zetwerk can produce parts using three-plate construction, which can significantly reduce cycle time by eliminating the need for hot runner molds. Three-plate construction molds enable better control of the parting line and reduced wear from repeated opening and closing of the mold.

Hot Runner Molds

Zetwerk can provide injection molded parts through hot runner molds, which eliminates the need for runners. This allows recycled plastics to have a cycle time that is similar to virgin polymers.


Overmolding is a method of manufacturing in which plastic is molded over another molded component. The first component is made inside an injection mold, and then placed into a second mold to add the over-molded material. This process is instrumental in producing parts that have complex geometries.

Multi-Cavity Molds (up to 128 cavities)

Zetwerk can produce parts using multi-cavity molds that improve the speed of production and cut down on the number of production shots needed.

Two-Plate Construction

When a simple part design is to be manufactured, the two-plate construction molds are a better option. A two-plate construction molds are suitable for simpler designs than three-plate molds.

Apart from the above capabilities, Zetwerk can produce injection molded components using collapsible core molds, angular side molds, multiple siders, and hydraulic and delay ejectors.


Zetwerk provides a full suite of services focused on reducing turnaround time and improving efficiency and value. Zetwerk delivers projects that are more cost effective and are brought to market sooner.


Zetwerk offers project management throughout the manufacturing process. After you create a PO, our team will guide you through each step. They will keep you up-to-date with the information you need to monitor production and share project information with internal stakeholders.


Tooling design is an optimization step that can improve speed when manufacturing injection molded components. The tooling’s design considers manufacturing tolerances and typical wear from usage.

Optimizing tooling is an often overlooked step when processing injection molded parts. Adding this step into the manufacturing process saves critical time during process development and ensures the tooling will meet your project’s needs.


A first-article inspection report (FAIR) is a part of any robust product development program. It is also critical to conduct detailed inspections to avoid out-of-tolerance components and rework for injection molded parts. Zetwerk’s process incorporates this essential step, giving you complete confidence in the parts you receive.


Global events of the early 2020s have demonstrated the importance of inventory management and supply chain resiliency. The traditional approach to JIT strains your ability to react to market or order fluctuations. Having a globally connected supply partner is an effective way to build resiliency and multi-source supply.


Zetwerk is your one-stop solution for complete end-to-end contract manufacturing and distribution. We provide:

  • Unlimited manufacturing capacity, which decreases risk and improves your ability to respond to demand fluctuations
  • Global raw material sourcing to protect cost and supplier resiliency
  • Secondary processing, including anodizing, powder coating, and CNC machining
  • Assembly, packaging, and distribution
  • Quality control – AS 9100D & ISO 9001:2015 certified
  • Vendor managed inventory to optimize material availability
  • Supply chain management for efficient raw material conversion
  • Project management for a hands-free experience, with weekly updates for project and timing accountability

Experience the difference Zetwerk makes in your manufacturing process. Request a quote today for injection molding services or any other manufactured component.

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