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Strategies for improving die casting quality

2020-04-24

In the process of high pressure casting of aluminum alloy, if the injection speed is too high in the low speed stage, on the one hand, a lot of air will enter the mold cavity through the pressure chamber, on the other hand, the aluminum liquid will billow in the pressure chamber, resulting in the increase of the air content of the aluminum liquid, thus affecting the quality of the die casting.

If the injection speed is too low, the casting will be cold insulation and bad forming.The specific requirements of low speed are in the low speed interval (0.1-0.5 m/s), uniform or uniform acceleration to gently promote the metal molten liquid, to avoid the metal liquid to produce turbulence and dissolve into the gas, so as to reduce the gas content of the metal liquid, but also make the gas in the mold cavity easy to discharge smoothly.

Generally, the injection velocity of this stage is relatively low, generally within 0.1-0.5 m/s.


At present, the general calculation formula of low speed can not be directly analyzed from the filling forming effect, resulting in a large deviation of the calculated results.

The production personnel only depend on the experience and the repeated debugging to determine the speed parameters in the low-speed stage, which on the one hand causes the process instability and a large number of trial production wastes, on the other hand prolongs the development cycle.


Longhua die casting machine co., LTD. Has 38 years of experience in die casting machine production, and cooperated with hefei institute of Chinese academy of sciences to develop the latest and most scientific die casting machine production technology, which can completely solve the problems of die casting such as pores, sand holes and so on, and greatly improve the quality and precision of casting.

Longhua die casting machine co., LTD., a professional die casting machine manufacturers, die casting technical experts.

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