Extrusion process and precautions of high-power aluminum extrusion radiator

• 1. For high-density tooth-to-tongue aluminum extrusion die test, the first aluminum rod must be a short aluminum rod or pure aluminum rod of 150-200mm.
• 2. Before trying the mold, the extrusion center of the aluminum extruder must be adjusted so that the extrusion shaft, the ingot barrel and the outlet of the die base are on the same center line.
• 3. During mold trial and normal production, the heating temperature of the aluminum rod should be between 480-520℃.
• 4. The heating temperature of the aluminum profile mold is controlled at about 480℃ according to the conventional mold temperature. The heat preservation time of the flat mold with a diameter of 200mm or less shall not be less than 2 hours. If it is a split mold, the heat preservation time shall be more than 3 hours; -6 hours to ensure the uniformity of mold core temperature and external temperature.
• 5. Before mold trial or production, the inner container of the ingot barrel must be cleaned with a cylinder cleaning gasket, and check whether the dry running of the extruder is normal.
• 6. When the mold is tried or the production is just started, the automatic gear of the extruder is turned off, and the switches of each section are reset to the zero position. Start slowly from the minimum pressure, and discharge the material for about 3-5 minutes. The pressure is mainly controlled during the aluminum filling process. The pressure is controlled within 100Kg/cm2, the ammeter data is within 2-3A, generally 80-120Kg/cm2 can be discharged, and then it can be slowly accelerated. During normal production, the extrusion speed is subject to pressure less than 120Kg/cm2.
• 7. During the trial or production process of aluminum alloy profile molds, if there is any phenomenon such as mold blockage, partial toothing, or too large speed deviation, the machine must be stopped immediately, and the mold should be unloaded in a point-retract mode to avoid mold scrapping.
• 8. In the trial mold or aluminum production process, the discharge port must be unobstructed, and the cushion support or clamp slack should be reasonably controlled according to the discharge situation. Observe and find abnormal conditions at any time and deal with them in time. When the shutdown occurs, the machine must be shut down immediately.
• 9. During the straightening process, it is necessary to carefully detect the changes before and after, operate in a standard manner, use moderate force, and strictly ensure the product quality.
• 10. Set the length reasonably in accordance with the requirements of the aluminum production plan. When sawing, the feed speed of the saw tooth should not be too fast to avoid hurting the end. The end must be clamped to remove the flash and burr.
• 11. Aluminium alloy profiles should be standardly installed in the basket, including the cushion strips should be placed reasonably to avoid damaging the profiles.
• 12. The aging temperature of the aluminum profile is controlled at 190±5℃, and the temperature is kept for 2.5-4 hours. After being out of the furnace, it is air-cooled.

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