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Plastic injection molding provides low cost at moderate to large
quantities. Plastic molding is an extremely versatile process for producing a wide range of simple or complex plastic parts
with a good finish. Almost any 2D or 3D shape can be achieved. However draft is required in most cases as the shape must allow
ejection from the mold. Side holes and even threaded holes are possible though they complicate the tooling. Examples of Industries served by Edco Industries Inc Appliance Parts
Cosmetics
Consumer Products Defense Electronic Engineering
Hardware Household Power tools
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Manufacturing Process Edco Industries
Inc. Processes Plastic injection molding Items by forcing molten plastic into a mold where it cools and hardens. In plastic injection molding granular plastic is fed by gravity from
a hopper into a heated barrel. As the granules are moved forward by a screw-type plunger, the plastic is forced into a heating
chamber, where it is melted. As the plunger advances
further, the melted plastic is forced through a nozzle into the mold cavity. The mold remains relatively cold so the plastic
solidifies almost as soon as the mold is filled. Custom steel tooling is required and adds to the initial cost but is quickly
amortized.
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