It can be seen from the extrusion process that the conical twin-barrel screw is operated under high temperature, certain corrosion, strong wear and large torque. Therefore, the conical twin-barrel screw must meet high temperature resistance and not deform under high temperature; wear resistance Long life; corrosion resistance, materials are corrosive; high strength, can accept large torque, high speed; has good cutting processing function; after heat treatment, the residual stress is small, and the thermal deformation is small.
There are many advantages of using conical twin-barrel screw in the injection molding machine. However, during the production process, we need to pay attention to the maintenance and maintenance of the conical twin-barrel screw. The spherical R part will deform, forming a melt escape groove, causing the nozzle to overflow, and the caliber part will be deformed. Therefore, the overflow should be checked and repaired in time. The threaded part of the conical twin barrel screw nozzle and the sealing surface on the side of the barrel should be checked regularly. If severe wear or corrosion is found, it should be replaced in time. Therefore, we need to check the internal passage of the screw nozzle of the conical twin barrel. The surface quality of the molten band can be observed through the air jet, and the residual melt discharged from the nozzle can more accurately reproduce the flow channel condition in the nozzle.
Application advantages of cone twin barrel screw:
1. The structure of the conical twin barrel screw is simple and the price is low;
2. It is suitable for plasticizing and extruding polymers, and suitable for extrusion processing of pellets. The shear degradation of the polymer is small, but the material stays in the extruder for a long time;
3. Cone twin barrel screw control is simple, and the technical control is simple;
4. The conical twin barrel screw has excellent mixing and plasticizing ability, and the material stays in the extruder for a short time, which is suitable for powder processing.