Some of the damage is caused by the artificially dragging the profile on the pendulum bed. When the fork bar sends the profile from the discharge rail to the swinging bed, the profile is scratched due to the excessive speed.
There is also a bare metal or graphite strip in the discharge rail or pendulum bed with hard inclusions, which cause scratches on the surface of the profile when it comes into contact with the profile; friction or extrusion between the profiles during transportation damage.
The solution for damage to the aluminum plate improves the quality of the mold, the mold is periodically nitrided and the nitriding process is strictly performed. Separate the profile from the accessory with a soft felt to minimize contact damage between the profile and the accessory. Strengthen the control of the quality of the ingot, and take it lightly in the production, try to avoid dragging or turning the profile at will.
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