Features and test methods: The surface of the casting in the mold opening direction shows stripe-shaped tensile marks with a certain depth. In severe cases, it is a surface-like flaw. The other is the adhesion of the molten metal to the mold, resulting in an overwhelming or missing material on the surface of the casting. cause: 1, aluminum manufacturers have cavity surface damage (collapse or knock). 2, the stripping direction is too small or oblique. 3, when the top out of balance, top skew. 4. The pouring temperature of the aluminum profile manufacturer is too high and the die temperature is too high, causing the alloy liquid to adhere. 5, mold release agent is not good. 6, aluminum and gold content of iron content is less than 0.6%. 7, rough cavity is not smooth, mold hardness is low. Precaution: 1. Repairing the damage surface of the mold surface, correcting the draft angle, and increasing the hardness of the mold (HRC45°~48°). The aluminum profile manufacturer improves the mold finish. 2, adjust the top rod, so that the top out of balance. 3, replace the demoulding effect of a good mold release agent. 4, adjust the alloy iron content. 5, reduce the pouring temperature, control the mold temperature is stable and balanced. 6, adjust the direction of the gate, to avoid the molten metal straight core, wall.
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Causes and Preventive Measures of Drawing Die Produced by Aluminum Die Castings