Aluminum extrusion white lines and their causes-aluminium extrusion press maintain tips

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Aluminum extrusion white lines and their causes-aluminium extrusion press maintain tips

Author : Judy Wei Date : 2013-1-23 11:31:29

Aluminum extrusion white lines and their causes
aluminium extrusion press maintain tip

In the aluminum profile extrusion production process, sometime there are some white lines on the aluminium profile surface, how did they cause and how do you to check the machine? The method is following:

There are two kinds of white line: transverse lines and vertical lines
1. Transverse lines, if the lines (the lines are deep) show on four faces of profiles, check the plunger pump displacement, the press pressure may be not stable. If the pump is all right, then check the prefill valve. We also heard other aluminum extrusion factory said, the dummy block may cause this problem, but we have not met this problem at our client’s factories.
If the line (the lines are light) is on the bottom side of the profile, that may cause by the handing table. When the run-out saw cut the profile, the table may shake and the profiles may lightly hit the handing table. So need to adjust the handing table.

2. Vertical lines, check the billet temperature, then the die, and then billet quality.

This is original article, edited by Judy Wei.
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