What are the welding materials and preparation work for plastic molds?

The welding materials of plastic molds are the basic conditions for welding repair and are also critical. According to different mold materials and different heat treatment states, appropriate welding materials should be selected for mold welding repair.

        In the annealed state, the heat treatment mold has not yet been welded. The material and the base metal need to be the same as possible to avoid cracking during the heat treatment process and affecting performance problems. General welding materials must have good tempering resistance and thermal fatigue resistance, and must maintain high hardness after welding.

        For molds that have been heat-treated, when welding repairs, you must consider that the welding structure can meet the performance requirements of the mold. Generally, welding materials with excellent high-temperature performance are used. Even if some materials have different compositions from the base metal, the performance after welding repairs is even Better than the base material.

        Special parts and components such as the high-temperature area and diverter cone of the mold require the use of high-alloy hardness welding materials. The hardness must meet the standard while also having good resistance to aluminum alloy erosion.

        Preparations that must be made before welding: cracks and cracks that appear on the surface of the mold must be removed in time. If the welding groove is a narrow groove, it will be very detrimental to the quality of the welding, so the groove needs to be rounded. deal with. The main reason why pores appear in welds is that there are a lot of impurities, oxides and oil in and around the welding position, which need to be cleaned up as soon as possible.