Before, Xiao Bian analyzed the sand turning process and dewaxing process for everyone, which are all suitable for the mold opening process of all copper lamps, so today we will learn about the process of die-casting copper.
Pressure casting is a special casting method with little and no cutting that has developed rapidly in modern metal processing technology.
It is a process in which molten copper is filled with mold under high pressure and high speed, and crystallized and solidified under high pressure to form castings. High pressure and high speed are the main characteristics of pressure casting. The commonly used pressure is tens of MPA, filling speed (Gate speed)
About 16 ~ 80 m/s, the time for copper liquid to fill the mold cavity is extremely short, about 0. 01 ~ 0. 2 seconds.
Because the products produced by this method have the advantages of high production efficiency, simple process, high Tolerance grade of castings, good surface roughness and high mechanical strength, a large number of mechanical processing processes and equipment can be saved, saving raw materials and other advantages, so it has become an important part of China's foundry industry.
Die-cast copper has finer workmanship and surface than dewaxed copper and sanded copper, but few enterprises in the all-copper lamp industry will use die-cast copper technology, because the cost of the mold used in die-casting copper is extremely high, the service life of the corresponding die-casting copper mold is also extremely long.