How To Use Injection Molding Screw Barrel

Injection Molding Screw Barrel is an important part of an injection molding machine. Its function is to transport, compact, melt, stir and apply pressure to plastics. All of this is accomplished by the rotation of the screw in the barrel. When the screw rotates, the plastic will generate friction and mutual movement on the inner wall of the barrel, the bottom surface of the screw groove, the screw edge advancement surface, and the plastic and the plastic. The advancement of plastic is the result of this combination of movements, and the heat generated by friction is also absorbed to increase the temperature of the plastic and melt the plastic. The design structure of the screw will directly affect the extent of these effects.
1. Do not start the machine when the barrel has not reached the preset temperature. New electric heating generally requires that the temperature reach the set value for 30 minutes before operating the screw
2. If the machine stops for more than half an hour each time, close the blanking port and clean the material in the barrel, and set up heat preservation
3. Avoid foreign matter falling into the barrel and damage the screw and barrel. Prevent metal fragments and debris from falling into the hopper. If processing recycled materials, a magnetic hopper should be added to prevent iron filings from entering the hopper.
4. When using anti-salvation, make sure that the plastic in the barrel is completely melted, so as not to damage the transmission system parts when the screw retreats.
5. Avoid the phenomenon of screw idling and slipping.
6. When using new plastic, the remaining material in the barrel should be cleaned. When using POM, PVC, PA+GF and other materials, minimize the degradation of the raw materials, and rinse them off with ABS and other nozzle materials in time after shutdown.
7. Avoid mixing POM and PVC into the barrel at the same time, which will react at the melting temperature and cause serious industrial accidents.
8. When the temperature of the molten plastic is normal but black spots or discoloration of the molten plastic are constantly found, check whether the screw non-return ring (apron, meson) is damaged.