Die spray streaking is a nozzle distance problem

PourA413Surface4/5 confidence

What we learned

What worked

Thinning the ratio to 1:90 and fixing nozzle distance at 180mm. Streaking on the sealing face stopped.

What failed

Thinning the ratio alone. The streaks moved but did not clear until the distance was fixed too.

War story

Two variables, changed one at a time, took two shots instead of one to find. Worth it. Changing both at once would have left us not knowing which mattered.

Pour conditions

Pour temp
694C
Mold temp
205C
Metal velocity
Standard
Degassed
Yes
Degassing
Rotary degas, 6 minutes
Die spray
Water based
Spray ratio
1:90 after the change, was 1:60
Cycle time
280 s

Tags

4
die-spraysurfacecosmeticsA413

Related entries

5
Captured Aug 8, 2026