small aluminum electronic enclosures.The causes of pitting in zinc alloy die casting and the solutions

　　The causes of pitting in zinc alloy die casting and the solutions

　　Zinc alloy die casting is a kind of precision casting method that uses high pressure to force a metal solution into a complex metal mold, but sometimes in the production process there will be pitting casting, what is the cause of this?

　　1. When filling, the metal disperses dense droplets, and the high impact wall;

　　2, the inner gate thickness is small;

　　3, the inner gate speed is too fast;

　　4, mold temperature is low.

　　The corresponding measures to solve the pitting of zinc alloy die casting:

　　1, at the beginning of the stamping will find that the metal liquid flow is dispersed, the correct design of the pouring system, to avoid the metal liquid spatter, improve the exhaust conditions, to avoid the liquid flow of too much gas;

　　2, at the beginning of the stamping will find the liquid metal flow jet, adjust the thickness and speed of the inner gate;

　　3, the casting surface is dark and accompanied by cold insulation, improve the mold temperature to the range of process requirements, the way is to connect the mold heater or less spray more hot several molds.

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