The welding materials of SING OI Plastic Injection Molding Company's molds are the basic conditions for welding repairs and are also critical. According to different mold materials and different heat treatment states, appropriate welding materials should be selected for mold welding repairs.
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.
Due to various undesirable factors in the injection mold, the drawn parts may crack, which is a very serious appearance defect. Too many defective products are even completely scrapped, which greatly wastes raw materials, reduces production efficiency, and wastes resources. How should this situation be resolved?
The pressing surface is unevenly colored and poorly polished, the pressing ribs are damaged, the length of the mold support is not the same after installation, and there are unreasonable places in the vent holes and drawn fillets. The above situations can be dealt with and processed one by one. Trim.
If the position of the test punching sheet and the air cushion pressure are unreasonable, they need to be adjusted within the appropriate range. At the same time, gauze or other plastic cloth can be placed on the pressing surface to control the flow and inflow of the sheet. Change.
The size and shape of the punching plate are unreasonable and do not have a certain number of process holes. This can be improved by changing the size of the punching plate and adding process holes. You can also print grid lines on the test punching plate to know more clearly. The condition of the sheet.
The profile in the material flow direction is relatively rough and needs to be polished. You can also enlarge the fillet part in the process supplement. In the subsequent process, the fillet corresponding to the shaping and drawing dies can also be done in an appropriate way, but you need to pay attention to the shaping amount and Stamping direction.
Contact: plastic injection molding Company
Phone: +86 18218572927
Tel: +86 0755-27164277
Add: Northwest of Huihao Industrial Park, No. 1, Chuangwei Road, Guangming District, Shenzhen