The foundry process should be strictly controlled during the use of OEM Aluminum Enclosure. Within the scope of process permission, try to reduce the casting temperature and injection speed of molten aluminum and increase the preheating temperature of mold. The preheating temperature of aluminum die casting die is increased from 100 ~ 130℃ to 180 ~ 200℃, and the die life can be greatly improved.
Welding repair is a common method in mold repair. Before welding, master the model of welded die steel, eliminate surface defects by machining or grinding, and the welding surface must be clean and dried. The electrode used should be consistent with the composition of die steel, and must be clean and dried. The mold is preheated together with the welding rod (H13 is 450℃), and after the temperature of the surface and the core is consistent, it is welded and repaired under protective gas. In the welding process, when the temperature is lower than 260℃, reheat it. After welding, when the mold is cooled to be touchable by hand, it is heated to 475℃ and kept at 25mm/h. Finally, it is completely cooled in static air, and then the cavity is trimmed and finished. Heating and tempering after welding is an important part of welding repair, that is, eliminating welding stress and tempering the thin layer under the welding layer which is heated and quenched during welding.
After the OEM aluminum enclosure is used for a period of time, there will be deposits in the cavity and core due to the high injection speed and long-term use. These deposits are formed by the combination of mold release agent, impurities of cooling liquid and a small amount of die-casting metal at high temperature and high pressure.