Commonly used plastic mold steels such as S136, NAK80, 718, 738, P20, 2316, 2083, S-STAR, etc. Tongfa Mold Laser Welding Machine can perform laser welding on plastic molds of different materials. Due to different material brands in different countries, some materials have similar compositions and can be widely used. For example, Tongfa laser welding machine can repair mold cutting errors, deep electric discharge machining, damage caused by other hard objects, incorrect bite processing, sand holes in the mold material itself, mold collapse caused by plastic not being pushed out in a timely manner during mold production, and wear during long-term injection of the mold. Tongfa laser welding machine can repair mold damage caused by these problems.