MOLD REPAIR

After cold welding repair, there is a certain color difference between the welding material and the matrix. Although it is very slight, it can be seen from a close look.2. After cold welding repair, because of the welding material, there is air leakage at the welding joint, so it can not be applied to repair the penetrating holes of water pump and valve.3. After cold welding repair, if the workpiece needs electrophoresis, electroplating, pickling or oxidation treatment, generally speaking, 50% of the repaired parts can be welded, but the color difference is more obvious.