When the aluminum extrusion mold comes out of the oven at high temperature, it must be placed on the support pad within the specified time. Prepare a support pad of appropriate size according to the cross-sectional shape of the mold. If the size of the support pad is too small, it will cause certain damage to the lower mold. The elastic pressure makes the size of the mold unstable, and the surface of the extruded aluminum profile lean tube produces uneven ripples.
2. There are debris on the working belt of the extrusion die.
If the work belt is not clean, has oil stains or is blocked by debris, the surface of the produced aluminum profile lean pipes will have pits and pits, resulting in unqualified shape, size and appearance quality of the product.
3. The upper and lower dies of the aluminum extrusion die are not parallel
The mold is improperly designed or used. The upper and lower molds are not parallel and have a bell mouth shape, which causes the extruded aluminum profile lean tube material to have an uneven surface after it is cooled and formed.
4. Uneven extrusion speed
When using the new mold, no attention was paid to the initial extrusion speed. The head and tail dimensions of each aluminum rod were not properly reserved, and the surface of the extruded product was uneven.
5. The size of the mold's empty knife is too small
If the size of the empty knife is too small, the metal flow will not be smooth and the speed will be uneven. The fast and slow flow speed will cause scratches on the mold and cause uneven appearance defects on the surface of the extruded aluminum profile lean tube.