extruded aluminum project box.Analysis of Defective Castings in Zinc Alloy Die Castings

　　In the process of forming zinc alloy die castings, defects may be caused by some external factors, and porosity is one of the defects of zinc alloy die castings. It is not only related to the casting process, but also to a series of factors such as the properties of the casting alloy, alloy melting, and the properties of the molding material.

　　Firstly, selecting the correct model material is important. If the pouring system is designed with a hollow sprue, it can mechanically block slag and adsorb the flow of the molten metal, making the filling process smoother. Secondly, there is the use of gating systems and insulation risers. The design of the inner gate should be conducive to the rapid forming of alloys, avoiding dead corners and hindering the manufacturing of castings. Finally, the improvement of coating breathability is crucial. High quality coatings should have the characteristics of wear resistance, easy brushing, no cracking, strong exhaust capacity, good breathability, and no contact with metal wetting agents or chemical reactions. Qualified die castings cannot do without high-quality coatings. With the prerequisite of high-quality coatings, stable development can be achieved in the future.

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