Influence of die temperature on aluminum alloy die casting.aluminum electronic project box

　　In the process of aluminum alloy die casting, the control of mold temperature is a relatively big knowledge, then what are the aspects of the influence of mold temperature on aluminum alloy die casting?

　　1. In the filling process, mold temperature has a great influence on liquid flow temperature, viscosity, fluidity, filling time and filling flow state. The mold temperature is too low, and the surface layer is broken by high-speed liquid flow after condensation, resulting in surface defects, and even cannot be "formed". When the mold temperature is too high, although it is conducive to obtaining a smooth casting surface, it is easy to shrink and sag.

　　2. Mold temperature has obvious influence on liquid cooling rate, crystallization state and shrinkage stress of alloy. When the mold temperature is too low, the shrinkage stress increases and the casting is prone to crack.

　　3. Die temperature has a great influence on the life of the die. The drastic temperature change forms a complex stress state, and frequent stress alternations lead to the crack of the die.

　　4. The influence of mold temperature on the dimensional tolerance of the casting: If the mold temperature is stable, the dimensional shrinkage rate of the casting is also stable, and the dimensional tolerance level is also improved.

　　Through the above analysis of the influence of temperature on aluminum alloy die casting, it can be found that controlling the mold temperature can reduce the density of gas in the mold cavity, which is conducive to the elimination of gas in the mold cavity, so as to obtain the casting with smooth surface, clear outline and dense structure.

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