What to do if there are flow marks and patterns on zinc alloy die-casting parts

　　There are many types of defects in zinc alloy die castings, and the causes of defect formation are multifaceted. Flow marks and patterns are just one of the defects. To eliminate the defects in zinc alloy die castings, it is necessary to first identify the defects, inspect them, and analyze the reasons for the defects in zinc alloy die castings. Only then can effective measures be taken quickly and accurately. Today, the editor will talk about the causes and solutions of flow marks and patterns in zinc alloy die castings.

　　Reasons for flow marks and patterns:

　　① The metal liquid that first enters the mold cavity forms an extremely thin and incomplete metal layer, which is compensated by later metal and leaves traces

　　② Low model temperatures, such as zinc alloy mold temperatures less than 150 and aluminum alloy mold temperatures less than 180, can result in such defects

　　③ High filling speed

　　④ Excessive coating dosage

　　⑤ High cavity back pressure

　　Now that we understand the causes of zinc alloy die-casting parts, let's talk about the solutions to the occurrence of mesh patterns in zinc alloy die-casting parts:

　　① Adjusting the cross-sectional area or position of the inner gate

　　② Adjust the filling speed appropriately to change the flow state of the metal filling cavity

　　③ Raise model temperature

　　④ Proper selection and improvement of coatings

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