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　　Quality control precautions for aluminum alloy die-casting parts

　　With the continuous development and application of new technologies and materials in China's die-casting industry, aluminum alloy die-casting parts are also ubiquitous in daily life. Due to the characteristics of die-casting production, the quality of aluminum alloy die-casting parts is affected by its production, management, molds, die-casting and other technologies. If not controlled properly, the scrap rate of die-casting will be very high, which will cause waste of manpower, material resources and financial resources, seriously affecting economic benefits and product quality. What sources can be used to control the quality of aluminum alloy die-casting parts?

　　1. Raw material control

　　To ensure the quality of die-casting parts and improve product qualification rate, strict quality control should be implemented when selecting raw materials. Usually, sampling inspection is used for each batch of incoming materials to measure the chemical composition of the main alloy elements. Then, based on the influence of each element in the alloy on subsequent processes such as die-casting, machining, and surface treatment, the chemical composition of aluminum, zinc, magnesium, copper, iron, etc. is strictly controlled.

　　2. Mold quality control

　　The design of mold structure plays an important role in the quality of aluminum alloy die-casting parts, such as ensuring that the sprue has appropriate flow rate, velocity, and pressure for alloy melting; The design of the overflow groove should ensure that the metal can fill the mold cavity during die casting to reduce casting defects such as insufficient casting, looseness, and shrinkage; The design of the exhaust groove should ensure smooth exhaust, etc. Only when the structural design of the mold is reasonable, will the quality and production efficiency of aluminum alloy die-casting parts not be affected.

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