Aluminum radiator is also called radiator aluminum profile. Aluminum radiator has the characteristics of beautiful appearance, light weight, good heat dissipation performance, and good energy saving effect. The surface of the processed aluminum radiator undergoes surface treatment through anodizing to increase the corrosion resistance, wear resistance and appearance of the aluminum material. At present, the commonly used types of aluminum radiators in China are: aluminum profiles for electronics, electrical appliances, and computer radiators, sunflower aluminum radiators, and power semiconductor radiator profiles. Aluminum radiators are widely used in industries such as machinery, automobiles, wind power generation, construction machinery, air compressors, railway locomotives, household appliances, etc. due to their superior performance. Aluminum alloy is widely used in radiator materials because of its light weight, beautiful appearance, good thermal conductivity and easy processing into complex shapes. There are three main types of aluminum alloy radiator materials: flat and wide, comb-shaped or fishbone-shaped; round or oval-shaped radiating fins; tree-shaped. Aluminum alloy is widely used in aluminum radiators because of its light weight, beautiful appearance, good thermal conductivity, and easy processing into complex shapes. There are three main types of aluminum radiators: flat and wide, comb-shaped or fishbone-shaped; round or oval-shaped radiating fins; tree-shaped. The characteristics are: the distance between the radiating fins is short, and a groove is formed between two adjacent radiating fins, and the aspect ratio is large; the wall thickness difference is large, the general radiating fin is thin, and the thickness of the base plate at the root of the industrial aluminum radiator is large . Therefore, it brings great difficulties to the mold design of the heat dissipation profile and the manufacturing and production of industrial aluminum profile
radiators. Some aluminum radiators are relatively small in size and symmetrical in shape. Most of the radiator profiles are flat and wide, with larger external dimensions and some asymmetrical. The aspect ratio of the groove between the fins is very large. Production is more difficult. Several issues need to be paid attention to in order to successfully produce aluminum radiators. Reduce squeezing force. In order to prevent the mold from breaking teeth, the extrusion force should be reduced as much as possible, and the extrusion force is related to the length of the ingot, the size of the alloy deformation resistance, the state of the ingot, and the degree of deformation. Therefore, the cast rod of extruded aluminum radiator should not be too long, which is about 0.6 to 0.85 times the length of the normal cast rod. Especially when trying out a mold and extruding a casting rod, in order to ensure the smooth production of qualified products, it is easy to use a shorter casting rod, that is, a casting rod that is 0.4 to 0.6 times the normal casting rod length (0.4 to 0.6) times the normal casting rod length to try the mold. Extrusion process. The key to the production of aluminum radiator is a trial mold of the extrusion die. If possible, you can do a simulation test on the computer first to see if the working belt of the industrial aluminum radiator is reasonable, and then try the mold on the extruder. A trial mold is very important. The operator must make the main plunger advance slowly at a low pressure lower than 8MPa when the main plunger advances and presses. The characteristics of industrial aluminum radiators are so good that someone uses a flashlight to look at the exit of the mold, and wait for each extrusion mold. After a heat sink is uniformly extruded into the die hole, pressure can be gradually accelerated for extruding. When continuing to squeeze after a successful mold trial, attention should be paid to controlling the squeezing speed to ensure smooth operation. Pay attention to the heating temperature of the mold when producing aluminum radiators, and make the mold temperature close to the ingot temperature. If the temperature difference is too large, the temperature of the metal will drop due to the slow extrusion speed during upward pressure, which will easily cause mold blockage or uneven flow rate.
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