Aluminum extrusion heatsink | Extrusion process and points for attention of high power teeth aluminum extrusion radiator

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1、 For the aluminum extrusion die with high density teeth and large tongue ratio, the first aluminum bar must be 150-200 mm short aluminum bar or pure aluminum bar.
2、 Before the die test, the extrusion center of the aluminum extruder must be adjusted, and the extrusion shaft, ingot barrel and die base outlet must be on the same center line.
3、 In the process of mold test and normal production, the heating temperature of aluminum bar should be between 480 ℃ and 520 ℃.
4、 The heating temperature of aluminum profile mold is controlled at about 480 ℃ according to the conventional mold temperature. The holding time of flat mold with diameter less than 200 mm shall not be less than 2 hours, and that of split mold shall be more than 3 hours; The mold with diameter more than 200 mm shall be kept for 4-6 hours to ensure the uniformity of the core temperature and external temperature of the mold.
5、 Before mold trial or production, the inner liner of the ingot container must be cleaned with the cylinder cleaning pad, and check whether the extruder runs normally.
6、 When the die is tested or the production is just started, the automatic gear of the extruder will be turned off and the switches of each section will return to the zero position. Starting from the minimum pressure, slowly start to press and discharge for about 3-5 minutes. During the aluminum filling process, mainly control the pressure. The pressure is controlled at 100kg / cm ² The ammeter data is within 2-3a, generally 80-120kg / cm ² The extrusion speed is less than 120kg / cm in normal production ² Subject to.
7、 In the process of trial or production of aluminum alloy profile mold, if it is found that the mold is blocked, tooth offset, too large deviation of speed and so on, it is necessary to stop the machine immediately and unload the mold in the way of point withdrawal, so as to avoid the scrapping of the mold.
8、 In the process of die test or aluminum production, the discharge port must be unobstructed, and the cushion support or clamp looseness should be controlled reasonably according to the discharge situation. Observe the abnormal situation at any time, deal with it in time, and stop the machine immediately.
9、 In the process of straightening, the changes before and after straightening should be carefully detected, the operation should be standardized, the force should be appropriate, and the product quality should be strictly guaranteed.
10、 According to the requirements of aluminum production plan, the length should be determined reasonably. When sawing, the feeding speed of saw teeth should not be too fast to avoid damaging the end. The end must be clamped to remove the flash and burr.
11、 The baskets of aluminum alloy profiles should be standardized, including the reasonable placement of the padding to avoid damaging the profiles.
12、 The aging temperature of aluminum profile is controlled at 190 ℃ ± Keep the temperature at 5 ℃ for 2.5-4 hours, and conduct air cooling after discharging.

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aluminum extrusion heatsink