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Steps of Plastic Injection Molding: Plasticizing

by:Bofeng     2021-03-31

Plastic Injection Molding has gained momentum in the last few years by employing varied techniques like thermoplastic and thermoset injection molding, blow molding, gyratory molding, compression molding, thermoforming, structural foam molding, etc

Plastic Injection Molding has become quite popular and effective for many companies. It offers various advantages. They include being able to keep up greater standards of production, being able to re create a high tolerance level in the products being produced, and lower costs for labor as the bulk of the work is done by machine. Plastic injection molding also has the added benefit of lower scrap costs because the mold is so precisely made. Injection molding is widely used for manufacturing a variety of parts, ranging from the smallest accessory to entire body panels for industries like automotive, aerospace and agriculture. Plastic Injection Molding mainly involves following four steps:

1 Plasticizing: During this process the polymer material from its hard granular form is converted to the liquid form at correct melting point. The pellets or plastic powder is melted with in the machine. Powdered materials used in Plastic Injection molding machines mainly are, Ethylene, Polycarbonate, Nylon, Polypropylene, Acrylonitrile-Butadiene-Styrene (ABS) and Polystyrene.

2 Injection: It is a crucial step during overall Plastic Injection Molding process when heated fluid is forced in to the mold at very high pressure. It is fed in to the mold through a nozzle by a long screw plunger inside a heated barrel.

3 Chilling: It includes cooling the melted fluid to allow it gain rigid shape.

4 Ejection: Here, the cooled and molded object is removed from the mold cavity.

Plastic Injection Molding is generally used to manufacture automotive parts like levers, gears and switches, and medical equipment components like blood analyzer, hear pump parts, orthopedic devices, etc. A whole range of plastic products we use in modern world is the outcome of Plastic Injection Molding. Be it your racks or the PC monitor you have in front of you etc, Plastic Injection molding is very eminent procedure in the manufacturing industry to cast and mold plastic in different shapes and sizes. Almost 32% of all plastics by weight is processed by injection molding. Through Plastic Injection Molding we pass melted plastic in to a mold cavity of inverse shape and allow it to cool resulting in the desired plastic form. We can produce various kinds of complex plastic products through Plastic Injection Molding


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