The main engine of the plastic pelletizer machine is the extruder. It consists of extrusion system, transmission system and heating and cooling system.
The extrusion system includes screw, barrel, hopper, die, and die.
The plastic is plasticized into a homogeneous melt by means of an extrusion system. The extruder head is screwed continuously during this process.
It is the most important part of the extruder. It is directly related to the application range and productivity of the extruder. Made of high-strength corrosion-resistant alloy steel.
It is a metal cylinder.
It is generally made of alloy steel with high heat resistance, high compressive strength, strong wear resistance and corrosion resistance or composite steel pipe lined with alloy steel.
The barrel cooperates with the screw to realize the pulverization, softening, melting, plasticizing, exhausting and compacting of the plastic, and continuously and uniformly convey the rubber material to the molding system.
The bottom of the hopper is equipped with a cutting device. In order to adjust and cut off the material flow. The side of the hopper is equipped with a sight hole and a calibration metering device.
4）Machine head and mold
The machine head is composed of an alloy steel inner sleeve and a carbon steel outer sleeve. The machine head is equipped with a forming mold.
The function of the machine head is to convert the rotating plastic melt into parallel linear motion. It is evenly and smoothly introduced into the mold sleeve, and the plastic is given the necessary molding pressure.
The plastic is plasticized and compacted in the barrel, and the porous filter plate flows into the molding die of the machine head through the neck of the machine head along a certain flow channel.
The function of the transmission system is to drive the screw.
Supply the torque and speed required by the screw during the extrusion process. It usually consists of a motor, a reducer and a bearing.
Heating and cooling are necessary conditions for the plastic extrusion process to proceed.