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Plastic Injection Molding services

Certifications: IATF16949:2016 | ISO9001:2015

Plastic injection molding is one of the core businesses of Prototool. We can help you avoid the troubles of “insufficient capacity,” “uncertain design capability,” “unstable product quality,” and “untimely delivery” with our ten years of injection molding experience. We clearly know what your product requirements are, especially in the “Automotive,” “Aerospace,” “Consumer electronics,” and “medical” industries.
Prototool’s injection molding team consists of more than 50 professionals, including experienced designers, programmers, operators, quality supervisors, etc. They are required to work in concert with our mold team and most of them are dedicated and creative. Thanks to their efforts, we have served hundreds of customers from all over the world with consistently positive feedback.

Why Choose Us

High Quality

With experienced designers, sophisticated production team, high-end production equipment, supplemented by complete quality inspection instruments (CMM, PROJECTOR), Prototool has passed ISO9001:2015 and IATF:16949 quality certification system to make a high quality guarantee for your products.

Quick Turnaround

Prototool considers our customers' delivery times to be our life, and we do not make promises beyond our capabilities lightly. With a quicker turnaround, we help you reach the market quicker and give you an edge over your competitors.

Considerate Services

Prototool arranges professional staff to serve you throughout the entire process. Timely response and effective solutions are their fundamental capabilities. Customer satisfaction is one of our ultimate goals.

Custom Design Optimization

We offer free advice on design optimization. Appearance, usage, materials, etc. are all factors we take into account. For your products, we hold regular DFM review meetings to make reasonable assessments and recommendations

How To Work With Us

The plastic injection molding process may seem simple, but there are many parameters that need to be tightly controlled to ensure the quality and consistency of the plastic components produced.

Here is the typical working order to expect when you hire us for our plastic injection molding services:

Submit Request

Submit your free quote request with a description and technical drawing of your product. In case of no technical drawing, no worries. We can reverse engineer.

DFM & Quotation

We usually get back to you within 24 hours. Of course, this may be a constant communication process, and the whole process is free.

Mold-making & Machining

Once you approve the quote and make the deposit, we start working on the initial work of mold-making, production, QC and so on.


Packaged, labeled, and shipped to your door right on time

Find high-quality Plastic Injection Molding Services?

The Plastic Injection Molding Process

platic injection molding products


The core and the cavity are the two main pieces of an injection mold. In the first step, during clamping, these two parts of the mold will be extruded and fit together by the machine.

3. Dwelling

Next is the dwelling phase, where the melted plastic is filled to the entirety of the mold through pressure. The pressure is applied directly to the mold such that the liquid fills all mold cavities, and the product comes out accurately and is identical to the mold.

5. Mold Opening

This is the opposite process of clamping. In this step, a clamping motor slowly opens the two parts of the mold to make for the safety and stability.

2. Injection

The plastic pellets are fed to the part of the barrel and loaded into the main cylinder, where they are heated at high temperatures to a liquid. The plastic liquid will be injected into the mold cavity when mixed in good condition.


This process step allows the time needed for the mold to cool. If this step is performed too hastily, the products may stick together or become distorted when demolding.

6. Ejection

After the mold is opened, the ejector pin will push the cooled product out of the mold cavity according to the design position, so that a basic product is completed.

Materials Used for Plastic Injection Molding

We offer a wide selection of materials for your project, depending on the application. The injection molding materials used when creating parts and products with plastic injection molding vary in their mechanical, thermal, chemical, electrical, and optical properties.

Here are the most commonly used materials for plastic injection molding:

Acetal Homopolymer/Delrin

PMMA (Acrylic, Plexiglas)


More custom materials on request


Factors affecting the tolerance of injection molded parts include plastic properties, product design, mold design, injection molding process, etc. When we talk about injection molding product tolerances, it’s better to consider the appearance and function of the finished product and the cost.

Usually, Prototool takes DIN 16742 as our injection molding tolerance standard, and for the automotive industry, we comply with the QC-T-29017-1991 automotive industry tolerance standard as our standard. When the customer has special tolerance requirements, we strictly follow the requirements.


We offer multiple finishing options to complete the plastic products made with the plastic injection molding process. You can choose from any of the following depending upon your application’s requirements:

Laser engraving machine

Standard Finish

Interior, non-cosmetic finish according to the geometry of the mold.

SPI Finishes

Range of SPI finishes from Grade 3 diamond / high polish to 320 stone low polish. These Finishing options include SPI A-1, SPI A-2, SPI A-3, SPI B-1, SPI B-2, SPI B-3, SPI C-1, SPI C-2, SPI C-3, SPI D-1, SPI D-2, and SPI D-3.

Threaded Inserts

We can install the most commonly used and popular standard inserts in UNF and metric sizes.

As Molded

As the name suggests, the mold will remain ‘as it is’ – without any secondary texturing or polishing.

Mold Texturing

Creating textures on the molds so that it shows on the final product. This finishing option includes matte, swirls, patterns, and lines.

Laser Engraving

Engrave part numbers, designs, logos, or any other specified printing onto your parts.

Pad Printing

Application of an ink-based design to the surface.


Painting the surface with standard colors or Pantone matching, including Primer and topcoat. Masking available; EMI (copper) paint.

Industry Application

The Plastic Injection Molding services by us have a large variety of applications across all industries, including:

Aerospace and Defense
Consumer Products
Design Services
Electronics and Semiconductors

Medical and Dental
Hardware Startups
Supply Chain and Purchasing

Our Strengths

Industry Expertise &

Our team of plastic injection molding experts is here to build you a plan for success for prototyping, design validation, and production applications.


We offer production-grade tooling to all our clients with cost-effective and quick solutions.

Complex and Custom

We run tight tolerances and 2D drawings for a wide variety of industries. No matter the complexity and personalization involved, we can make it happen for you.

What is Plastic Injection Molding?

Plastic Injection molding is a well-designed and simple manufacturing process that can quickly produce intricate geometrical shapes for custom parts and products. It is a popular process of choice for companies looking to produce repeatable parts with strict mechanical requirements. Plastic injection molding involves filling a mold tool with liquid plastic resin under great pressure. The tool may have only a single cavity or hundreds of cavities to make unlimited numbers of parts.
Injection Molded Square Product

Benefits of Plastic Injection Molding

Plastic injection molding offers various benefits for all industries. Some of its top benefits include:

  • Ability to produce large volumes of parts quickly

Once the process has been set up and tested, plastic injection molding machines can produce thousands of items quickly and efficiently.

  • High surface quality

This process can produce high-quality parts with consistency. Plastic injection molding typically produces parts that are strong, tensile, and highly detailed.

  • Cost-Effectiveness

Once the mold has been built, the cost of production per component is relatively low, especially if created in high numbers.

  • Flexibility

Manufacturers can choose the mold design and type of thermoplastic, allowing them to produce a variety of components, including parts that are complex and detailed.

  • Consistent and Repeatable

The process of plastic Injection molding can help produce thousands to millions of parts that are precise and accurately identical to the master mold.


Injection molding is a speedy, cost-effective, and exceptionally accurate manufacturing process that is typically used for the mass production of complex molded parts in various materials.

The time taken to create a plastic injection mold tool varies according to the complexity of the design and the possible heat treatment. However, typically, a plastic injection mold tool can be made anywhere between five days to two weeks.

Once an injection mold tool is made, plastic injection molding is the most rapid and cost-effective manufacturing process to produce large numbers of finished plastic parts. The products made with this process have excellent surface finishes with consistent and repeatable dimensional tolerances.

There is a wide range of industries using plastic injection molding, including aerospace, automotive, medical devices, consumer goods, education, energy, electronics, robotics, toys, and more.

Yes, we offer multiple colors on the same material. However, this may cost a little extra.