Date：2018-07-18

The screw is an important part of the injection molding machine. Its role is to transport, compact, melt, agitate and apply pressure to plastics. The structure of the screw barrel is a round tube with a feed opening in the middle. What are the cleaning methods for the screw barrel? The following is explained by Loie:

First, the use of barrel cleaning agent

If the injection product is replaced frequently with raw materials or the plasticizing temperature range of the residual material in the barrel and the refueling material is large, in order to save raw materials and improve work efficiency, it is economical to use the barrel cleaning agent. The special cleaning agent is a kind of rubber-like material. It is not melted at high temperature in the barrel, and is softened in the thread groove of the screw. When the screw is moved forward in the thread groove of the screw, the residual material can be taken away to make the barrel It was cleaned up.

Second, using the refueling ejector method

If the plasticizing temperature range of the newly prepared raw material is higher than the plasticizing temperature range of the residual material in the barrel, the barrel and the nozzle can be heated to the lowest plasticizing temperature of the newly exchanged raw material, and then the new refueling is added and continuously injected into the air. Until there is no residue 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 and heated to the plasticizing temperature range of the residual material in the barrel to remove the residual material. The water can be added to the back for cleaning, 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 disposed of.