Along the die opening direction, the casting surface shows a strip of strain marks, with a certain depth, and when it is serious, it is a surface wound
The other is the metal liquid and mold bonding, adhesion and strain, so that the casting surface is more or less material
1, the aluminum manufacturer cavity surface damage (collapse or knock).
2, the direction of the discharge direction is too small or inclined
3, the top out of balance, the top oblique
4, the casting temperature is too high, the mold temperature is too high, resulting in alloy liquid adhesion
5, the release agent effect is not good
6, aluminum and gold containing iron content is less than 0.6%.
7, the rough cavity is not smooth, the mold hardness is low
1, repair the mold surface damage parts, correct the stripping slope, improve the die hardness (HRC45 degrees ~48 degrees), aluminum profile manufacturers to improve mold finish
2, adjust the ejector lever to balance the ejector
3, change the release effect of good release agent
4, adjust the alloy iron content
5, reduce the pouring temperature, control the mold temperature balance and balance
6, adjust the gate direction, avoid the metal liquid directly to the core, the wall