Plastic injection molding is an industrial process involving the introduction of molten thermoplastic materials into a mold cavity through the use of an injection screw or ram. This process allows the production of simple or complex parts at high speed with high quality.
The plastic injection molding industry began in 1870 with the processing of celluloid materials. The modern injection molding machine was not developed until the 1950's with the development of the helical injection screw found in most modern molders. This helical screw and barrel arrangement permitted homogeneous melting and mixing of the plastic resin materials.
Plastic injection molding serves many industries including automotive, communications, electronics, housewares, novelty, health and beauty, lawn and garden, and food and beverage. The array of products produced are almost limitless. Items such as laptops, cell phones, beverage containers, gears, toys, electronics cases, and engine components. Take a look around, there is a good chance that you have a plastic injection molded part near you. 30% of all plastic is formed by the injection molding process.
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