GTM Injection Molding

Flexibility and thermoplastic precision.

GTM serves a wide range of customers from automotive and HVAC to boating and furniture. We have 20 molding machines from 120 to 1150 tons that can mold thousands of different types of thermoplastics, including engineered and high performance resins.

With over 40 years of injection molding experience, our staff uses scientific (de-coupled) methods in every component of the molding process:

• Piece Part Design Assistance
• Material Selection and Handling
• Tool Design and Construction
• Processing

We have state of the art manufacturing and warehouse capability. Our machines feature computerized process control and each machine has its own personal computer for convenient access of machine parameters, quality plans, and other essential data needed for consistent quality and efficiency.

GTM stands ready with a full array of manufacturing options to help you successfully launch your product and satisfy your plastic injection molding needs.

Whether your concern is cosmetic, precison, or both, our molding team is focused on achieving process repeatability which delivers consistent parts - high quality and on-time.

Injection Molding Focus

Plastic part color - precision consistency.

One of the great advantages of a plastic part is the ability to mold in the color. Molded color parts do not need painting, and normal wear and tear do not affect the color. This creates tremendous savings in production, maintenance, and durability. Color concentrate is typically 2% of the weight of a part.

However, color concentrates present two major challenges: The slightest distribution variation can change the color or other parameters, and concentrate is much more expensive than the base resin.

Many injection molders add concentrate by manually weighing the amount of concentrate needed, and pre-mixing the concentrate with the base resin by hand or a mechanical tumbler. It is not difficult to imagine the inconsistent results and waste of a manual mixing method, not to mention the labor involved.

The solution? Automated color feeders.

Automated color feeders solve both challenges - accurate distribution and eliminating waste.

The feeders are attached to the hopper of the molding machine directly, and electronically moniter the let-down of concentrate into the mold with an accuracy of 0.2% or better. This results in highly consistent color.

The feeders also eliminate waste in a number of ways. Manual mixing, and the resultant waste of material and labor are avoided. Stainless steel mechanisms and electronic monitering prevent any waste in the molding process itself. The feeders are also quick to change and set up between jobs.

Automated color feeders are one of many methods that GTM employs to bring our customers highter quality at lower cost.