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How to check out the three kinds of hole defects on aluminum alloy die castings!
- 2020-09-04-

Aluminum alloy die casting is a kind of die casting that is widely used, but it is also a die casting that is prone to defects. The most common defect of aluminum alloy die casting is the appearance of some small holes on its outer surface. Some people call these small holes. Some people call these small holes as shrinkage holes. Die-casting aluminum castings will always have various die-casting defects during production. At this time, various defects need to be found through inspection methods, so that different defects can be used according to different defects. Solutions to ensure the quality of die-casting parts, so how to check the defects of die-cast aluminum castings? So what kind of "holes" are these small holes that appear on the surface of aluminum alloy die castings?

In fact, the small holes that appear on the surface of aluminum alloy die castings can be divided into the following three types according to the different causes:


1. Slag hole: In the production process of aluminum alloy die-casting parts, the hole caused by the impurity of molten metal or the entry of foreign matter during die-casting can clearly see foreign matter that is inconsistent with the aluminum alloy matrix.


2. Porosity: In the production process of aluminum alloy die-casting parts, the pores caused by gas involved in the filling of the die-casting mold cavity by the molten metal will exist in any position of the casting, and can be subdivided into entangled pores and precipitation. There are three types of stomata and invasive stomata.


3. Shrinkage cavity: due to the cooling and shrinkage of aluminum alloy die-casting parts, the holes often appear in thick parts far away from the inner gate or aluminum alloy die-casting parts. The inner hole is in an irregular state, and the hole wall has a metallic luster and is not polluted. Over.

Generally speaking, aluminum die-casting manufacturers have the highest quotation for the first type of die-casting, but with the improvement of people's consumption level, some of the three-type die-casting products are used in high-end consumer products, and the requirements for appearance quality and dimensional accuracy are very high. High, so the price of aluminum die-casting manufacturers is also very high.


The above is the inspection method for inspecting the defects of die-casting aluminum castings. Jieaosi Die Casting has been engaged in zinc and aluminum alloy die-casting for 11 years. When producing die-casting parts, pay special attention to various defects of die-casting parts to ensure the quality of die-casting parts.