The screw material of the high-speed extruder must have […]
The screw material of the high-speed extruder must have high mechanical strength, be able to withstand huge torque, and have deformation properties under high temperature and high pressure. Because the rotation of the screw feed barrel of the high-speed extruder is carried out under high temperature, high pressure and high torque. During the rotation process, the material must be pushed forward vigorously, and at the same time, it must also withstand the strong friction and erosion of the plastic decomposition corrosive gas.
The screw of the high-speed extruder is the most important part of the plastic machine equipment. It is directly related to the plasticizing effect and output of the plastic machine. Let's introduce the advantages of the screw of the extruder.
1. It has the advantages of high wear resistance and corrosion resistance.
2. After special treatment, it can effectively improve the wear resistance of the barrel and screw, and improve the service life.
3. Corrosion and wear resistance
4. The heat treatment adopts nitriding treatment, electroplating hard chromium layer, high frequency quenching, spraying corrosion-resistant and wear-resistant bimetallic layer, vacuum quenching, etc.
Matters needing attention in the daily use of the extruder barrel screw:
1. During the daily operation of the extruder barrel and screw, it is necessary to pay attention to avoid the phenomenon of screw idling and slippage;
2. The extruder barrel and screw need to pay attention to avoid mixing POM and PVC into the barrel at the same time, and the reaction will occur at the melting temperature and cause serious industrial accidents;
3. Avoid foreign objects falling into the barrel to damage the screw and barrel. Prevent metal fragments and sundries from falling into the hopper. If processing recycled materials, a magnetic hopper should be added to prevent iron filings from entering the barrel;
4. When the extruder barrel screw has not reached the preset temperature, do not start the machine. The newly turned on electric heater generally requires that the temperature reaches the set value for 30 minutes before operating the screw;
5. When using anti-saliva, make sure that the plastic in the barrel is completely melted, so as to avoid damage to the transmission system parts when the extruder barrel screw retreats.
