Plastic machinery industry continues to develop and expand, all kinds of advanced technology of plastic machinery is also emerging, according to the different plastic processing technology, plastic machinery can be divided into extruder, injection molding machine and blow molding machine three categories.
Extruder for plastic machinery
Screw under the action of the molten plastic through a fixed shape of the extrusion port extrusion, under the action of the traction machine by water-cooled after cutting. Mainly used for a variety of the same cross-section of a large number of continuous production, such as tube rods profile, etc., can also be used for plastic modified granulation.
The basic principle of the extruder is simple - a screw rotates in the cylinder and pushes the plastic forward. The screw is actually a bevel or slope, wound on the center layer. The aim is to increase the pressure to overcome the greater resistance. In the case of an extruder, there are three kinds of resistance to overcome: the friction between the solid particles on the cylinder wall and the friction between the turns of the screw in the first few laps; the adhesion of the melt on the cylinder wall; The body is pushed forward when its internal logistics resistance.
Plastic machinery injection molding machine
Injection molding machine is the injection of molten plastic into the mold, after cooling is the product. Use a very wide range, according to the different characteristics of plastic machinery, the use of different places. Injection molding machine is the largest use of plastic machinery industry, processing machinery, not only a large number of products can be directly produced by injection molding machine, and it is also composed of injection blowing the key equipment.
Introduction of blow molding machine for plastic machinery
Blow molding is a common method of making hollow thermoplastic products. The main products are tube and hollow containers. Blow molding machine can be made by heating the preformed plastic products, and then into the mold blow molding, this method is mainly used for high-speed high-yield PET bottles and BOPP bottle production, that is, two-step plastic mechanical process; Can be combined with the injection molding process into a injection blow blow machine, which is the production of PET containers commonly used method; blow molding process can also be combined with the extrusion process, extrusion blow molding equipment to adapt to a wider range, to produce products And more abundant, the product includes multi-layer composite film and various types of polyolefin hollow containers, widely used in food, medicine and cosmetics industry.