Classification of Plastic Extruders

The main machine of the plastic extruder is the extruder, which consists of extrusion system, transmission system and heating and cooling system.
1. The extrusion system of extrusion system includes screw, barrel, hopper, head and die. Plastic is plasticized into a uniform melt through the extrusion system and is continuously extruded by the screw head under the pressure established in the process.
(1) Screw: is the main part of the extruder, it is directly related to the scope of application and productivity of the extruder, made of high-strength corrosion-resistant alloy steel.
(2) barrel: is a metal cylinder, generally made of heat-resistant, high compressive strength, strong wear-resistant, corrosion-resistant alloy steel or alloy steel lined composite pipe. The barrel cooperates with the screw to realize crushing, softening, melting, plasticizing, exhausting and compacting of the plastics, and continuously and evenly conveying the adhesive to the molding system. Generally, the length of the barrel is 15-30 times its diameter, so that the plastic can be fully heated and fully plasticized.
(3) hopper: a truncation device is installed at the bottom of the hopper to adjust and cut off the flow of material. The side of the hopper is equipped with a visual hole and a calibration and measurement device.