The cylinder is a cylindrical part, and screw together on plastic plastic operation, installation of the tube and the heating element, to heat the plastic.

1.cylinder repair. Heating element outside the examination machine barrel, installation is firm, the location is appropriate. The barrel up to the process temperature, re fastening a connecting screw, avoid melt overflow. Some plastics, such as PVC, PC etc., the strong corrosion of barrel, they will bring damage, therefore in shutdown in barrel does not allow for this type of corrosion resistance of plastic, which must be cleaned up, and then coated with a layer of protective oil. If there is a glass fiber plastic raw materials, carbon fiber, calcium carbonate, these inorganic materials on the barrel wear large, barrel, then select the wear-resistant otherwise, barrel and screw will soon be wear. Remove cylinder should be in the cleaning barrel, the barrel is still in the hot state, to protect the flange plane, plane and the front end of the nozzle is connected, remove the wooden hammer tapping available when appropriate. After cleaning, check the joint surface is scratched and wear condition, be careful not to scratch the joint surface. The inner wall of the washing barrel, application of copper brush or cloth to clean, do not allow the use of steel and other hard objects to scrape adhesion melt.

2.cylinder repair. In the barrel after cleaning, check carefully observe the barrel surface, if wear and tear, injury, if not serious, can be used for oil or emery cloth polishing, or be caught in the lathe, polishing oil or emery cloth. Such as severe wear, available inside micrometer measuring the internal dimension, from around the front barrel to the opening of the hopper should be multi point measurement, understand the actual barrel wear, make corresponding processing. Depending on the wear, such as wear hard layer is not ultra heat treated, can wear with the barrel inner hole surface. If the wear or damage has been coated and heat treatment hardening layer, may make the hard layer is worn away, mold repair when, can in the barrel with a alloy sleeve after use.