Plastic Injection Molding services

Certifications: IATF16949:2016 | ISO9001:2015

Prototool specializes in plastic injection molding, with a decade of experience that can help you avoid common challenges like insufficient capacity, uncertain design capability, unstable product quality, and untimely delivery. Our expertise extends to various industries, including automotive, aerospace, consumer electronics, and medical. Our injection molding team of 50+ professionals, including designers, programmers, operators, and quality supervisors, work seamlessly with our mold team to deliver exceptional results. Our dedicated and creative team has successfully served hundreds of customers worldwide, earning consistently positive feedback.

Por qué elegirnos

plastic injection molding precision control

Experienced Team

  • 500+ monthly delivered projects
  • 10+ years industry experience
  • 100+ high-end technical personnel
plastic injection molding quick turnaround

Quick Turnaround

  • As fast as 7 days
  • Free DFM service
  • Instant quote within 24hrs
plastic injection molding experienced team

Precision Control

  • 10+ Fortune 500 partners
  • IATF:16949, ISO9001:2015 certified
  • Quality-control team & equipments
plastic injection molding in house manufacturing

In-house Service

  • 80+ imported equipments
  • 30,000 ㎡ of modern plant
  • Cost-effective & superior quality

Our Awesome Clients

Find high-quality Plastic Injection Molding Services?

Cómo trabajar con nosotros

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.

Enviar solicitud

To obtain a complimentary quote, please provide a product description and technical drawing with your request. Don't have a technical drawing available? Not a problem. We offer reverse engineering services as well.

DFM y presupuesto

Our typical response time is within 24 hours. However, please note that the communication process may require ongoing discussions, and the entire process is completely free of charge.


Once the design has been approved, we will start making the mold for your plastic parts. Our team will use advanced technology and equipment to fabricate a high-quality mold that meets your specifications.

Moldeo por inyección

Once the mold is ready, we will begin the injection molding process. Our skilled technicians will use the mold to create high-quality plastic parts consistent in shape and size. We will perform quality control checks throughout the process.


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.

plastic injection molding comparison automotive plastic injection molding comparison medical

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.

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.

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.


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.

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.

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

Our wide selection of materials for plastic injection molding ensures that we have the right material for your project, depending on its application. These materials vary in their mechanical, thermal, chemical, electrical, and optical properties. Some of the most commonly used materials for plastic injection molding are:

Acetal Homopolymer/Delrin

PMMA (Acrylic, Plexiglas)


More custom materials on request


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:

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:

Aeroespacial y defensa
Consumer Products
Design Services
Electronics and Semiconductors

Medical and Dental
Hardware Startups
Supply Chain and Purchasing

Our Strengths

Industry Expertise & Guidance

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

Production-Grade Tools

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

Complex and Custom Designs

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.

Mold Making Ability
Design & Engineer Team
Injection Molding Plant
Quality Control
1-on-1 Customer Service
Logistic Department

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.


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


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.