What are the cleaning methods for the barrel screw?
What are the cleaning methods for the barrel screw?Screw is an important part of injection molding machine. Its role is to transport, compact, melt, stir and apply pressure to plastics. The structure of the screw barrel is a round tube with a discharge opening in the middle. What are the cleaning methods for screw barrels?
What are the cleaning methods for the barrel screw?
1. Adopting barrel cleaner
If the raw materials used for injection products are changed more frequently or the plasticization temperature range between the residual material in the barrel and the refueling is quite different, in order to save raw materials and improve work efficiency, it is more economical to use barrel cleaners. Special cleaning agent is a kind of material similar to rubber material. It does not melt in the barrel at high temperature. It is softened in the screw groove of the screw. When the screw groove is moved forward, the residual material can be taken away to make the barrel. Get cleaned up inside.
2. Adopting the refueling ejection method
If the plasticizing temperature range of the raw material to be replaced is higher than the plasticizing temperature range of the residual material in the barrel, the barrel and nozzle can be heated to the lowest plasticizing temperature of the new raw material, and then add the new refill and continuously inject into the air Until there is no residual material in the barrel.
If the plasticizing temperature range of the residual material in the barrel is higher than the plasticizing temperature range of the material to be replaced, the barrel should be heated up to the plasticizing temperature range of the residual material in the barrel to remove the residual material. The nozzle material can be added for cleaning later, and finally the new material is put into production. If the product requirements are high, the first few molds of the new material can be scrapped.
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