ã€ALUMINIUM NETWORK】Characteristics and test methods: Appearance inspection, the surface of the casting has the same direction as the flow direction of the metal liquid, and there is clearly visible and non-directional texture of the metal substrate, and there is no development trend. The reasons are as follows: 1. The metal liquid that enters the cavity first forms a very thin and incomplete metal layer, and is left behind by the metal liquid. 2, the mold temperature is too low. 3. Spilling occurs when the cross-sectional area of ​​the gate is too small and the position is improper. 4. The pressure on the molten metal is insufficient. 5, pattern: excessive use of paint and injection oil. Preventive measures: 1, increase the mold temperature. 2. Adjust the cross-sectional area or position of the ingate. 3. Adjust the velocity and pressure of the metal in the runner. 4, choose the appropriate coating, injection of oil and adjust the amount of paint injection.
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