First, analyze why aluminum alloy die castings are deformed?
One is the overall or partial deformation, and the other is that the geometry of the die casting does not match the drawing. The reasons for this situation are as follows: poor casting structure and early mold opening, resulting in insufficient casting rigidity, improper setting of the ejector rod, uneven force during ejection, improper gate position, or too thick a gate, It is easy to deform when the gate is removed, and the local surface of the mold is rough, causing high resistance. The product is deformed when ejected, and the mold temperature is too high, resulting in no fixed casting or excessive ejection force, which causes product deformation.
For aluminum alloy die castings with this kind of deformation problem, the solution can be considered from the following points, improving the casting structure, reasonably adjusting the mold opening and holding pressure, setting the ejection position and the number of ejectors, changing the gate thickness, and strengthening the mold. Treat, reduce demolding resistance, control local mold temperature, and maintain mold thermal balance.