Aluminum surface bubbles will not only affect the material beauty, will also affect the use effect of material. The aluminum surface bubbles is nuisance. To get rid of the aluminum surface bubbles, the first thing we need to know about is the cause of the aluminum surface bubbles. Kaixin Aluminum would tell you.
Poor wear of the extrusion tube and the extrusion pad, the size of the extrusion tube and pad are not matched properly. The diameter difference between the two gaskets used exceeds the allowable value.
Extrusion tube and pad are too dirty, sticky with oil, water, graphite, etc.
Lube oil contains water.
Too much deep cut slot , pores, sand holes or oil on the ingot surface or ingot surface.
Barrel is not cleaned when replacing the alloy
The extrusion barrel temperature and the extrusion ingot temperature are too high.
The temperature and size of the ingot exceed the allowable negative deviation.
The ingot is too long and filled too fast, the ingot temperature is uneven, which causes non-drum filling, so the exhaust in the cylinder is not complete, or Improper operation, no exhaust process was performed.
Unreasonable die hole design, or improper cutting residual material, defective material in diversion and diversion orifice was taken out. The air in the gap enters the surface during extrusion.
Above is the cause of industrial aluminum surface bubble. Most are the problem in the production process of the aluminum manufacture.
Kaixin Aluminum checks every link of production strictly To prevent this problem.