How to solve the problem of aluminum die casting surface strain

     The characteristics of aluminum die casting surface strain:
(1)The opening direction along the casting surface is line strain marks, there is a certain depth, the entire surface of serious injury;
(2)The metal liquid and the mold surface stick and, cause the casting surface lack of material.
     Produce reason:
(1)The mold cavity surface has the damage;
(2)The direction of the mold release has no inclination or inclination is too small;
(3)The mold release is not balanced;
(4)The mold is loose;
(5)The casting temperature is too high or too low, high temperature led to the adhesion of liquid alloy mould;
(6)The stripping agent effect is not good:
(7)The iron content of less than 0.8% in aluminum die casting materials;
(8)The cooling time is too long or too short.
     Treatment method:
(1)Repair mold surface damage;
(2)Correction of inclination and improve the mold surface finish;
(3)Adjust the top lever, balance the push out;
(4)The fastening mould;
(5)The control of pouring temperature and mold temperature at 180~250 °C;
(6)Replacement release agent;
(7)Adjust iron content of aluminium alloy;
(8)The adjustment of cooling time;
(9)To modify the gate, change the direction of liquid aluminum.

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