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Injection Molding

GPI understands that additive prototypes aren’t always adequate for your testing needs, in which case injection molding can give you the accurate part for first run prototype and small to large run production. When your production tooling won't be ready for months, injection molding is a great way to receive parts quickly and inexpensively. GPI Prototype can offer you quick turn tooling and injection molded parts to meet your timelines as needed.  

GPI Prototype can provide injection molds that can be produced in cast steel, aluminum, P-20 or high-grade tool steel. Aluminum can be used if your volume requirements don't justify the higher cost of steel tooling. Aluminum tooling can be very cost effective prior to moving into high run production molded parts.

We can deliver prototypes and short-run production engineering-grade thermoplastics fast, reducing your time to market. Our variety of press sizes allow us to meet your plastic injection molding needs from 10 to 100,000 parts.

Injection molding is used to create many things such as wire spools, packaging, bottle caps, automotive dashboards, pocket combs, one-piece chairs and small tables, storage containers, mechanical parts and most other plastic products available today. Injection molding is the most common method of part manufacturing. It is ideal for producing high volumes of the same object. Some advantages of injection molding are high production rates, repeatable high tolerances, the ability to use a wide range of materials, low labor cost, minimal scrap losses, and little need to finish parts after molding. Some disadvantages of this process are expensive equipment investment, potentially high running costs, and the need to design moldable parts.

Injection Molding Materials:
•    ABS
•    Nylon
•    Polycarbonate
•    Ultem
•    Polypropylene
•    Acetal
•    Nylon
•    Polyethylene
•    And many more


Little to no finishing is required on injection molded parts because the desired textures and finish levels are applied to the mold cavity.

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