Method for solving shrinkage of die-casting piece

Abstract

The invention relates to an aluminium alloy die-casting improvement method, in particular to a method for solving shrinkage of the die-casting piece; the methods of reducing pouring temperature, improving the die-casting piece structure, increasing specific pressure, setting an alloy overflow groove, improving pressure chamber fullness degree and improving a running gate system are adopted, so as to effectively improve the shrinkage defect generation of the aluminium alloy die-casting piece.

Description

Technical field [0001] The invention relates to an aluminum alloy die-casting process method, in particular to a method suitable for solving shrinkage cavities in die-casting parts. Background technique [0002] In the die-casting production process, during the condensation process of die-casting parts, irregular shapes and rough surfaces are caused by insufficient internal compensation. Also known as shrinkage and shrinkage, the existence of these defects will directly affect the internal quality of die castings. The main reasons for this defect are as follows: First, the alloy pouring temperature is too high, and the mold temperature gradient layout is unreasonable The second is that the wall thickness of the casting is not uniform, resulting in heat knots; the third is that the specific pressure is low; the fourth is that the capacity and location of the overflow tank are improper, and the inlet is too thin; ; Hexapod ingate area is small. Contents of the invention ...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the shrinkage cavity problem in aluminum alloy die castings, our company has undergone a lot of trial production in the process of die casting process design, adopting methods of lowering the pouring temperature, improving the structure of the casting, increasing the specific pressure, setting the overflow groove for the alloy, and increasing the fullness of the pressure chamber. , Improve the gating system and other methods, so as to effectively improve the shrinkage cavity defects of aluminum alloy die castings