Die-casting process method for semi-solid state metal die-cast formation

Abstract

The invention discloses a die-casting process method for semi-solid state metal die-cast formation. The die-casting process method includes using a semi-solid state die-casting machine as a processing device and using a pulper as a device for preparing and delivering a semi-solid state slurry; adding a metal modificator to a liquid metal raw material during preparation of the semi-solid state slurry so that the liquid metal raw material generates more crystal nucleuses, and die-cast member products have better mechanical properties. According to the die-casting process method, by means of a die-cast manner of the semi-solid state slurry, the die-cast member products are compact interiorly or do not produce air holes during a die-casting process, the best interior structure and mechanical properties of the die-cast member products and product qualities are guaranteed; by means of semi-solid state slurry die-casting, compared with traditional high-speed high-pressure injection formation processes, the die-casting process method has the advantages that during mold stripping, die-cast members are low in temperature and extremely small in deformation amount and need not complicated surface processing, and the best shapes and surface smoothness of products can be guaranteed.

Description

[0001] technical field [0002] The invention relates to a metal die-casting process, in particular to a die-casting process for semi-solid metal die-casting. Background technique [0003] Ordinary high-speed and high-pressure injection molding process requires high-temperature aluminum liquid at about 680°C to quickly fill the mold. During the molding process, it is easy to entrain air to form internal shrinkage cavities and pore defects. After the casting is processed and assembled, it is easy to have poor airtightness; the cooling process product after die-casting The thermal deformation is large, and the deformation of the die-casting blank can reach about 2mm. During cleaning, manual correction is required to ensure the flatness required for subsequent processing, which causes difficulties in processing positioning and adversely affects product quality and accuracy. [0004] At present, the internal quality of ordinary die-casting products is unstable, and the proportio...

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Problems solved by technology

[0003] Ordinary high-speed and high-pressure injection molding process requires high-temperature aluminum liquid at about 680°C to quickly fill the mold. During the molding process, it is easy to entrain air to form internal shrinkage cavities and porosity defects. After the casting is processed and assembled, it is easy to have poor airtightness; the cooling process product after die-casting The thermal deformation is large, and the deformation of the die-casting blank can reach about 2mm. When cleaning, manual correction is required to ensure the flatness required for subsequent processing, which causes difficulties in processing positioning and adversely affects product quality and accuracy.

[0004] At present, the internal quality of ordinary die-casting products is unstable, and the proportion of poor airtightness of assembled products is about 10%. The cleaning process of die-casting parts is labor-intensive, and the appearance quality is not easy to guarantee. It is the bottleneck process of die-casting production, which restricts the rapid development of die-casting industry. develop

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