Flow marks and patterns defects and solutions of aluminum die casting

Appearance inspection

1. The causes of flow mark are as follows:

1) low mold temperature

2) bad gate design and bad gate location

3) low material temperature

4) low filling speed and short filling time

5) unreasonable pouring system

6) poor exhaust

7) unreasonable spray

2. The cause of the pattern is excessive spraying or poor quality of the coating within the mold cavity. The solution and prevention methods are as follows:

1) adjust the cross-sectional area or position of the inner runner

2) improve mold temperature

3) adjust the speed and pressure of the internal runner

4) appropriate selection of paint and adjustment of dosage