The extruder is in screw under the action of molten plastic through a fixed shape extrusion extrusion, in traction machine function by the water-cooling forming after cutting. Mainly used for a variety of the same cross-sectional product substantially continuous production, such as a tube, bar, profile and so on, can also be used for plastic modified granulation.
Two, injection molding machine
Injection molding machine is the molten plastic mixed injection into the mold, cooling after the products. The use is very extensive, according to different use of plastic, where is also different . Injection molding machine is used in the plastic processing industry with the largest amount of processing machinery, not only a large number of products available production injection molding machine directly, and it is composed of the injection stretch blow moulding process, key equipment.
Blow molding is the manufacture of hollow thermoplastic products commonly used method, the main products are cylinder membrane and hollow container. blow moulding machine can be heated to molding products plastic into the mold, and then blowing molding, this method is mainly used for high speed and high yield of PET bottles and BOPP bottle production, namely the two step process; blow molding and injection molding process can also be combined into injection stretch blow machine, which is the production of container PET commonly used method; blow molding process and extrusion process can also be combined Extrusion Blow Molding Machines, a broader range, capable of producing products is also more abundant, product includes a multilayer composite film and all kinds of polyolefin hollow container, widely used in food, pharmaceutical and cosmetic industries.
According to the production of plastic products, plastic machinery can be divided into plastic mixing machine, plastic molding machine, plastic processing machinery and two auxiliary plastic processing machinery and equipment such as the four major categories. Plastic mixing machinery for various forms of plastic mixture manufacturing, including kneading machine, refining machine, granulator, screening machine, crusher and grinding machine.
Plastic molding machine called a processing machine for plastic, plastic products or products molding, including pressure presses, injection molding machine, extrusion machine, blow molding machine, rolling machine, rolling machine, foaming machine. Plastic two processing machinery for plastic products or products processing and post processing, including thermal forming machine, welding machine, welding machine, hot stamping machine, vacuum evaporation plating machine, flocking machine, printing machine and so on. Metal processing machine tools are also used in two plastic processing. Auxiliary plastic processing machinery or apparatus is used to realize the rationalization of plastic processing, including automatic metering feeding device, trim automatic recovery device, injection molding products, injection mould automatic extraction device for quick replacement device, injection mold cooling machine, automatic thickness measuring device as well as the raw material conveying and storage equipment. This kind of auxiliary machinery or equipment, has become a modern plastics processing process automation are an indispensable part.
