What causes part distortion?
Parts may distort as they solidify and cool in the die, or during ejection from the die. These problems are solvable but usually require discussions between the part designer, the tool designer and the die-casting engineer since they involve increasing draft angles etc. However, part distortion is quite often caused by mishandling during press trimming, polishing etc. or when the parts are clamped in jigs for machining, plating or painting. These problems are best solved by checking parts after each process. Q: I got rid of die casting blisters by increasing the freeze time but now they are being caused by the powder coat people. A: Blisters are caused when gas is trapped below the surface of the die-casting. As the casting is ejected from the die, the zinc alloy is hot and weak so that the internal pressure causes it to creep and produce the blister. If the die caster increases the die close (freeze time) part of the cycle, the casting will be cool enough and strong enough to resist t
