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Plastic Injection Molding

Written by Jill Morrison
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Plastic injection molding is used for manufacturing plastic parts. Plastic is commonly used in manufacturing because it is versatile and low in cost. There are many complex design options available when working with plastic as well.

Plastic Injection Molding Characteristics

Plastic injection molding is initiated with the heating of plastic pellets. After the pellets are melted, it can be injected into a mold with a particular shape. After the plastic cools, it can be removed from the mold and the process may begin again.

With plastic injection molding, it is important to consider the design of the plastic. Specific decisions need to be made about weld lines. If they are ignored, weld lines may be susceptible to stress failure and cracks in the future.

The best way to utilize time and effectiveness is with a uniform wall thickness. Walls can be thick or thin in design, but should be even all around. Uneven walls may create problems for the plastic manufacturer.


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