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Plastic Injection Molding
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Injection molding is the most important process used to manufacture plastic products. Over 40% of all thermoplastic materials are used in injection molding and more than 50% of all polymer-processing equipment is for injection molding. The injection molding process is ideally suited for mass production of plastic parts today. Injection molding has to meet the ever increasing demands for quality and economical parts.
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Injection Molding Resources
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Injection molding’s is accomplished by machines called injection molding machines. Plastic resin is fed into the machine through a hopper in the process area. These resin polymers include virgin and recycled material. Resin polymers are broken into multiple types HDPE, LDPE, PET and many more. While most polymers are clear; colorant maybe added during the injection process.
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The resin is heated as it enters the process, from the machines hopper. A plunger pushes the plastic through the heated chamber where the material is softened into a fluid state.
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At the end of the machine the polymer is forced into a closed mold. Once the plastic resin cools, the mold opens and the product is ejected. This process is repeated hundreds or even thousands of times until the production run is complete.
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