Method for solving blister generated in die-casting piece

Abstract

The invention relates to an aluminum alloy die-casting improving method, in particular to a method which is suitable for solving blister generated in a die-casting piece. By adopting the following methods: mould temperature is controlled, injection speed is reduced, coating material with low gas evolution is selected, an overflow well is additionally arranged, pressure holding time and mould staying time are adjusted and smelting technology finishing is carried out, the generation of blister defect of the aluminum alloy die-casting piece is effectively improved.

Description

Technical field [0001] The invention relates to an aluminum alloy die-casting process method, in particular to a method suitable for solving the problem of air bubbles in die-casting parts. Background technique [0002] During the die-casting production process, the gas in the subcutaneous pores of the die-casting parts expands to form bubbles. Also known as bubbling, the existence of these defects will directly affect the surface quality of die castings. The main reasons for this defect are as follows: 1. The mold temperature is too high; 2. The filling speed is too high, and the metal flow is involved Too much gas; the third is that the amount of paint is too much and the amount of gas is large; the fourth is that the exhaust is not smooth; the fifth is that the mold is opened too early; the sixth is that the alloy melting temperature is too high. Contents of the invention [0003] In order to solve the problem of air bubbles in aluminum alloy die castings, our company ...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem of air bubbles in aluminum alloy die castings, our company has undergone a lot of trial production in the process of die casting process design, using control mold temperature, reducing injection speed, selecting paint with small gas generation, adding overflow tanks, and adjusting holding pressure. The mold retention time, trimming and smelting process and other methods can effectively improve the generation of air bubble defects in aluminum alloy die castings