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Why are there defects in zinc alloy die-casting? How to deal with it?

Why are there defects in zinc alloy die-casting? How to deal with it?
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  • Categories:News
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  • Time of issue:2021-04-22 14:21
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(Summary description) Zinc alloy die-casting has been used more in today's daily life and production. However, due to various reasons, the defects of zinc alloy die-casting are unavoidable. What causes the defects of zinc alloy? How to deal with it?

Why are there defects in zinc alloy die-casting? How to deal with it?
Recommend

(Summary description) Zinc alloy die-casting has been used more in today's daily life and production. However, due to various reasons, the defects of zinc alloy die-casting are unavoidable. What causes the defects of zinc alloy? How to deal with it?

  • Categories:News
  • Author:
  • Origin:
  • Time of issue:2021-04-22 14:21
  • Views:

 Zinc alloy die-casting has been used more in today's daily life and production. However, due to various reasons, the defects of zinc alloy die-casting are unavoidable. What causes the defects of zinc alloy? How to deal with it?

1

There are many reasons for the defects, mainly the wrapping gas, improper gate position selection and diversion shape, poor runner shape design, too high internal gate speed, poor exhaust, too deep mold cavity position, and excessive paint It is caused by factors such as unburnt before filling, unclean charge, and too much machining allowance.

 

 

       According to these reasons, in the face of zinc alloy die-casting, you can choose the gate position and diversion shape that are beneficial to the gas removal in the cavity, and the nozzle cross-sectional area of ​​the sprue should be as large as possible than the cross-sectional area of ​​the internal gate, and the internal casting should be increased. The thickness of the mouth, the overflow groove and the exhaust duct are opened at the last filling part of the cavity, and the exhaust plug is opened at the deep cavity. The inlay form is adopted to increase the exhaust, and the amount of paint is thin and uniform. Filled after being burned out, using a small amount of gas The coatings and furnace materials must be clean and dry, strictly abide by the melting process, adjust the injection speed, the conversion point of slow injection speed and fast injection speed, reduce the pouring temperature, increase the specific pressure and other measures to solve the problem.

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