Die casting mould design is reasonable or not will directly affect the plastic shrinkage rate, due to the mold cavity dimension is obtained by the estimate of the size of plastic products and shrinkage rate, and the shrinkage is or manual of engineering plastics as recommended by the plastic manufac

The molten alloy liquid is poured into a pressure chamber, which is a precision die casting, and the steel mould is filled with high speed, and the alloy liquid is solidified under pressure to form a kind of precision casting method. Precision casting has the following advantages.1.Product quality is goodSize precision high on the casting, generally can be reached 6 to 7, even up to 4; good surface smoothness, generally reach 5 to 8; high strength and hardness, strength increase 25-30% relative sand casting, but decreased the elongation of 70%; dimensional stability, good interchangeability, complicated and thin-wall castings can be die-casting.2.High production efficiencyMachine with high productivity, such as domestic J III 3 type horizontal cold empty die casting machine average eight hours can die-casting 600 ~ 700 times, small hot chamber die casting machine average every eight hours can die casting 3000~7000; long service life of the die casting die, a pair of die casting, the cl