quality aluminum extrusion cnc products introduce the relevant knowledge of aluminum extrusion cnc products

The aluminum extrusion profile has convex bubbles on the surface of the product, which are common at the head and tail. The complete ones are called bubbles, and the broken ones are called skins. Why does this problem occur? Follow the editor of quality aluminum extrusion cnc products to have a simple understanding!
1. Causes of bubbles and skinning in aluminum extrusion processing aluminum profile products
1. Excessive wear of the extrusion cylinder and extrusion pad, improper size matching of the extrusion cylinder and extrusion pad, and the difference in the diameter of the gasket used exceeds the allowable value;
2. The squeeze cylinder and the squeeze pad are too dirty, sticky with oil, moisture, graphite, etc.;
3. Lubricating oil contains water;
4. There are 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;
5. When replacing the alloy, the inside of the barrel was not cleaned;
6. Extrusion barrel temperature and extrusion ingot temperature are too high;
7. The temperature and size of the ingot exceed the allowable negative deviation;
8. The ingot is too long, the filling is too fast, and the temperature of the ingot is uneven, causing non-drum filling, so the exhaust in the cylinder is not complete, or the operation is improper, and the exhaust process is not performed;
9. Unreasonable die hole design, or improper cutting of the residual material, 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.

Second, the method of eliminating bubbles or peeling of aluminum extrusion profiles
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, and the extrusion gasket should not be out of tolerance;
2. Keep the surface of tools and ingots clean, smooth and dry;
3. When replacing the alloy, clean the cylinder thoroughly;
4. Check the equipment and instruments frequently to prevent the temperature from being too high and the speed from being too fast;
5. Strictly implement process regulations and various systems;
6. Reasonably design and manufacture tools and molds, and design the diversion holes and diversion holes with an internal slope of 1°-3°;
7. Strictly operate, cut the residual material correctly and exhaust completely.
The above is the introduction of quality aluminum extrusion cnc products editor: the introduction of knowledge about aluminum extrusion cnc products.