Plastic Injection Molding

Our custom plastic injection molding consists of six injection molding presses ranging in size from 120T to 1450T. We also cover insert molding and in-mold appliques (decorative films).

In addition to our new plant in Roseville, Mich., Special Tool & Engineering has two vacuum form presses. One of our state-of-the-art presses covers in-mold appliques and our other press handles vinyl and leather wraps. Our assembly operations make us experts with manual fasteners, heat stake, and ultrasonic welding and tape.

Special Tool’s employees are extremely versatile in skilled operations. As an industry-leading company, we have a culture for quality, maintaining aluminum production molds, and creating custom hand-built products, ranging from design, prototyping, constructing, and molding.

We have experience with engineering grade resins such as:

  •  Nylons
  •  PP
  •  Polyesters
  •  PE
  •  Acetal
  •  TPO
  •  ABS
  •  TPE
  •  PC
  •  PC+ABS

Advantages of Plastic Injection Molding

There are many advantages to using injection molding. However, it is vital to understand these advantages before deciding whether injection molding is right for your business. These are the advantages to consider:

Reduce Costs: Perhaps the most significant advantage of plastic injection molding is it is quick and affordable. The molding process is speedy, allowing for a high output rate. Increased output will streamline your processes and will enable you to make more money in less time. Once the injection molds have been produced once, countless parts can be created from a single mold. Typically, a new item can be made once every 30 seconds. Also, unlike traditional manufacturing methods, molding reduces the likelihood of sharp edges. The final product is smooth, precise, and built precisely to your specifications.

Eliminate Waste and Increase Efficiency: The molding process is so precise that only the required amount of plastic is needed. You won’t have to worry about plastic being thrown out due to a faulty manufacturing run. The molding process is also predictable and you can always recycle excess plastic to minimize waste.

Integrate Design Complexity: Plastic injection molding is ideal for high-production items that must be extremely uniform. Objects with complex designs, such as complicated electrical components, are well suited to the molding process. The original molds are put under a large amount of pressure and heat during the molding process. Therefore, it is feasible to create a mold with a lot of detail and complexity.  

Increase Strength and Material Versatility: Strength is one of the critical factors you should consider when designing a plastic injection molded item. You need to fully brief the designer and let them know if the item should be ridged or malleable. The piece’s strength is vital to determine during the design process to integrate the right number of ribs and gussets. Understanding how the part may be used and the environment in which it may be used is also essential.

Material is also a consideration during the design process. Choosing the right material can provide the proper structure for the item and increase its strength and stability. You also have the flexibility to play around with color. The same mold can be used to create many products of different colors and shades. You can also use other materials with the same mold if you choose. Being meticulous during the design process ensures you get a robust and stable output.

Special Tool and Engineering is a recognized leader in creating high-quality, affordable injection molds. We specialize in helping operators streamline their processes and increase product reliability.

Plastic Injection Molding Gallery


33910 James J. Pompo
Fraser, MI 48026

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Phone: 586-285-5900
Fax: 586-285-5901

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