1. There are patterns on the surface of zinc alloy die castings, and there are traces of metal flow. Reasons:

1. The flow channel leading to the inlet of the casting is too shallow.

2. The injection specific pressure is too high, resulting in too high metal flow rate and splashing of molten metal.

Adjustment method:

1. Deepen the gate runner.

2. Reduce the injection specific pressure. the

2. The reasons for the small convex tumors on the surface of zinc alloy die castings:

1. Rough surface.

2. There are scratches, pits and cracks on the inner surface of the cavity.

Adjustment method:

1. Polishing cavity.

2. Replace the cavity or repair it. the

3. There are push rod marks on the surface of the casting, the surface is not smooth, and the reasons for the roughness are:

1. The push rod (ejector rod) is too long;

2. The surface of the cavity is rough, or there are sundries.

Adjustment method:

1. Adjust the length of the push rod.

2. Polish the cavity, remove sundries and oil. the

4. Reasons for cracks or local deformation on the surface of zinc alloy die castings:

1. Uneven distribution or insufficient quantity of ejector rods, uneven force:

2. The push rod fixing plate is deflected during work, resulting in a large force on one side and a small force on the other side, which causes the product to deform and produce cracks.

3. The wall of the casting is too thin and deformed after shrinkage.

Adjustment method:

1. Increase the number of ejector rods and adjust their distribution positions to balance the ejection force of the casting.

2. Adjust and reinstall the push rod fixing plate.