Visual inspection: There are stripes on the surface of the casting that are consistent with the direction of the molten metal flow, there are obviously non-directional lines that are different the metal matrix in color, there is no development trend.

The causes of flow marks are as follows:

1) Mold temperature is too low

2) Poor runner design poor position of inner gate

3) The material temperature is too low

4) Low filling speed short filling time

5) Unreasonable gating system

6) Poor exhaust

7) Unreasonable spray

The cause of the pattern is too much paint in the cavity poor paint quality. The solutions prevention methods are as follows:

1) Adjust the cross-sectional area position of the inner runner

2) Increase mold temperature

3) Adjust the speed pressure of the inner runner

4) Appropriate additive coating adjustment dosage

Causes solutions of flow marks patterns produced by aluminum die casting

Visual inspection: There are stripes on the surface of the casting that are consistent with the direction of the molten metal flow, there are obviously non-directional lines that are different the metal matrix in color, there is no development trend.

The causes of flow marks are as follows:

1) Mold temperature is too low

2) Poor runner design poor position of inner gate

3) The material temperature is too low

4) Low filling speed short filling time

5) Unreasonable gating system

6) Poor exhaust

7) Unreasonable spray

The cause of the pattern is too much paint in the cavity poor paint quality. The solutions prevention methods are as follows:

1) Adjust the cross-sectional area position of the inner runner

2) Increase mold temperature

3) Adjust the speed pressure of the inner runner

4) Appropriate additive coating adjustment dosage