screw damage causes

Matters needing attention:



(1) If there is a slight wear or scratch mark on the working face of the screw, it can be ground and polished with oil stone or fine emery cloth.



(2) screw working surface has serious wear, deep scar groove, should check and analyze the screw wear reasons, troubleshoot, in order to avoid similar phenomena, and then repair the deep scar groove. If the screw thread wear is serious, the Screw and Barrel with the gap increases, molten leakage increases when working, the amount of injection is not stable, the screw thread outer circle should be thermal spraying wear-resistant alloy, and then according to the actual size of the barrel diameter, according to the parts with the gap requirements for screw grinding.



If the barrel is badly worn, the diameter of the inner hole increases after repair, and the screw can no longer meet the size requirements of the matching gap between the barrel and the screw after spraying, the screw should be manufactured again. The outer diameter of screw thread should be processed according to the clearance requirements of the two parts and the actual inner diameter of the barrel.