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Difference between injection molding and blow molding

Source: Honkia Prototype   Published: 2016-12-01   Views: 238

Injection molding is a method of manufacturing plastic products by injecting molten plastic into the mold cavity by means of pressure, and cooling the molded product to obtain various plastic parts. There are mechanical injection molding machines specially designed for injection molding. The most commonly used injection molding plastic is ABS. The resulting shape is often the final product, and no additional processing is required. Many of the details, such as the bosses, ribs, threads, can be molded in one step by injection molding. Injection molding products: household appliances, phone shell, daily necessities and so on.


Blow molding is a rapidly developed plastic processing method. By extrusion or injection molding, thermoplastic resin can be made into tubular plastic parison. Heated to soften state, placed in the split mold, input compressed air immediately after closing the mold  to make the plastic parison inflated and close to the mould. After cooling, the blow molding products can be obtained. From the classification of plastic processing technology, blow molding usually belongs to extrusion. With the birth of high-density polyethylene and the development of blow molding machine, blow molding technology has been widely used. Polyethylene, PVC, polypropylene, polyester are suitable plastics for blow molding. Blow molding products: mineral water bottles, beverage bottles.


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