Part nine:die line,extrusion defect analysis and quality control method
Die line,extrusion defect analysis and quality control method
Extrusion die line causes and solutions
Extrusion die line
A longitudinal depression or protrusion formed on the surface of extruded profiles.
Die lines are present to some degree in all extrusions and are caused by a roughening of the die bearing.
The main causes of die line:
The main reason: the die land cannot achieve absolute smoothness.
Solutions for die line:
1. Ensure that the surface of the die land is clean, smooth and without sharp edges;
2. Reasonable nitriding treatment to ensure high surface hardness;
3. Correctly modify the dies;
4. Design the die land reasonably, and the die land should not be too long.
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