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Aluminum alloy combination die extrusion appears when the longitudinal welding line how to solve

Author：Dongguan Tongtoo Aluminum Products Co., Ltd Click： Time：2021-04-15 09:19:55

Aluminum alloy combination die extrusion appears when the longitudinal welding line how to solve

The longitudinal welding line is the strip or line defect or incomplete welding defect which appears on the decorative surface of aluminum profile extrusion material at the confluence position of metal flow along the extrusion direction. The depth of the defect is from the surface to the back through the entire thickness, through corrosion or anodizing can be found. From the naked eye observation, similar to the tissue striations, the convergence of the bar-like pattern, reference to the structure of the mold can be distinguished. In the extrusion die, the weld part of the metal flow, and other parts of the organization caused by differences. Aluminum extrusion, die welding cavity aluminum alloy supply caused by insufficient.

Elimination of longitudinal weld lines:

1. Change the bridge structure and welding cavity of the shunt combination die. For example, adjust the area of the inlet and the area ratio of the extruded material, as well as the length of the splitter section of the weld.

2. Increase the extrusion coefficient appropriately.

3. Increase the extrusion temperature and decrease the extrusion speed, pay attention to the balance between the extrusion temperature and the extrusion speed.

4, extrusion cylinder, extrusion gasket should not be oiled, should be kept clean.

5. Avoid mixing lubricant and foreign matter in the welding place.

6. increase the length of residue appropriately.

7. Adopt the ingot extrusion with clean surface.

8. Choose the right aluminum alloy.

9. Increase the diameter and depth of the welding chamber.