简单介绍精密压铸工艺及其优点Simple introduction of precision die c
Press the molten alloy mixture to a indoor, filling at high speed steel mould cavity, and make the liquid alloy solidification under pressure and form a precision casting process of casting. Precision die casting has the following advantages:
1. The products are of good quality
Casting dimension precision is high, generally equivalent to 6 ~ 7 magnitude, even can reach level 4; Good surface finish, general equivalent to level 5 ~ 8; The strength of the strength and hardness is higher, is generally 25 ~ 30% higher than that of sand mold casting, but the elongation decrease about 70%; Size stability, good compatibility; Can die casting thin wall complex casting. For example, the current minimum zinc alloy die casting wall thickness of 0.3 mm; Aluminum alloy castings can be up to 0.5 mm; The smallest cast out of the pore size of 0.7 mm; The minimum pitch of 0.75 mm.
2. High production efficiency
Machine productivity high, such as domestic J Ⅲ type 3 horizontal cold empty die casting machine die casting of 600 ~ 600 times on average eight hours, small hot chamber die casting machine die casting of 3000 ~ 3000 times on average every eight hours. Die casting type long life, a pair of die casting, die casting alloy, life can reach hundreds of thousands of times, or even millions of times; Easy to realize mechanization and automation.
3. The good economic effect
Due to the die casting dimension precision, table is bright and clean, etc. Mechanical processing and no longer have commonly used directly, or processing capacity is small, so can not only improve the utilization rate of metal, and reduce a lot of processing equipment and working hours; The casting price is easy; Combination die casting can be used in other metal or non-metallic materials. Save the assembly time and save the metal.