Why does the surface of extruded aluminum profile foam and how to eliminate it

Extruded aluminum.com/products.html' target='_blank'>aluminum profiles are used in a wide range of fields, but they are mainly used in interior decoration. The structural performance of this extruded aluminum profile is relatively stable and relatively resistant to corrosion. The only disadvantage is that sometimes the surface of the extruded aluminum profile will blisters. Then what should we do in this situation? Let me introduce how to eliminate these bubbles. 1. Reasons for bubbles and peeling of aluminum extrusion processing aluminum profile products 1. Extrusion cylinder and extrusion pad are worn out, the size of extrusion cylinder and extrusion pad are not properly matched, and the diameter difference of the used gasket exceeds the allowable value; 2. The extrusion cylinder and the extrusion pad are too dirty, with oil, moisture, graphite, etc.; 　　 3. Too many shovel grooves on the surface of the ingot, too deep, or there are pores, sand holes, loose tissue, and oil on the surface of the ingot; 4. When replacing the alloy, the inside of the cylinder was not cleaned; 　　 5. The ingot was too long, filled too fast, and the temperature of the ingot was uneven, causing non-drum filling, so the exhaust in the cylinder was not complete, or the operation was improper, and the discharge was not performed. Gas process; 　　 6. The die hole design is unreasonable, or the residual material is improperly cut, the residual material in the diversion hole and the diversion hole is partially taken out, and the gas in the gap enters the surface during extrusion. 2. Methods to eliminate bubbles or peeling in extruded aluminum profile factory 1. Reasonably design the matching size of the extrusion cylinder and the extrusion gasket, and check the tool size frequently to ensure that it meets the requirements. If the extrusion cylinder has a big belly, it should be repaired in time. The mat should not be out of tolerance; 　　2, the surface of tools and ingots should be kept clean, smooth and dry; 　　3, when changing the alloy, thoroughly clean the barrel; 　　4, check equipment and instruments frequently to prevent excessive temperature and speed; 　　5, reasonable design , Manufacturing tools and molds, the diversion holes and diversion holes are designed to have an internal slope of 1°-3°; 　　 6. Strict operation, correct cutting of residual materials and complete exhaust.
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