Do you know the precautions to improve the quality of aluminum extrusion?

1. According to the operation planner select the die that meets the planner, Flat die: 460℃ --- 480℃ B. Shunt die: 480℃ --- 500℃. The maximum residence time of the mold in the furnace is not more than 8 hours, the process of loading the mold should be quick and fast to prevent the mold from cooling.

2. Aluminum alloy round ingots are not allowed to roll on the ground, and any surface with mud, sand and dust should be cleaned up before heating in the furnace.

3. Aluminum bar heating furnace temperature setting heating stage set 300 ℃ -450 ℃, aluminum bar on the temperature control, according to the wall thickness should be consistent with the T ≥ 1.4mm to temperature control in 440 ℃ -540 ℃, T < 1.4mm temperature control in 400 ℃ -540 ℃, depending on the species, mold structure, alloy type.

4. Aluminum alloy round ingots in the furnace before heating, should be made surface quality self-inspection, self-inspection by the host hand is responsible for, where there is obvious slag, cold segregation, center cracks and bending of the round ingots should not be heated into the furnace should be selected to return to the melting and casting workshop.

5. The end surface of the ingot cylinder and the die should be flat and free of damage and aluminum sticking, otherwise the material will run away when extruding. In the process of extrusion, the head of the extrusion team should measure the temperature of every 10-20 ingots with a handheld thermometer and make a record so as to grasp the temperature change of the ingots at any time and keep the normal extrusion temperature.

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