Conical twin barrel screws are widely used in: granulation, drawing, film blowing, tube drawing, foaming, extruding, technical board, etc., conical twin barrel screws plastic treatment process: heat treatment, nitriding treatment, let us introduce below The following items should be paid attention to in the plasticization of cone twin barrel screw:
1. After cleaning the rubber head or replacing the rubber head, remove the head and burn it with fire to completely burn the remaining material on the rubber head
2. Check carefully, from the hopper to the inner spring nozzle.
3. Check whether toner is added to the raw material of the conical twin-cylinder screw, whether the temperature is set properly, there may be oil in the barrel of the new machine, and so on.
4. Whether the pipes conveying raw materials are anti-static hoses or stainless steel pipes. When the raw material is transported, it will generate static electricity when rubbing against the ordinary PVC hose, and static electricity will cause the production of black spots on the product.
5. Check the dehumidification dryer of the raw material. The regeneration temperature is very high. If the quality of the heating tube is not good, it is easy to have black flakes falling off the outer wall of the heating tube, and then fall into the molecular sieve, and then enter the entire system. In this way, you do The products that come out have black spots.
6. A special conical twin-barrel screw must be used, because the PC material is very corrosive, and black material will come out when the conical twin-barrel screw rots.