The principle of extrusion is to apply pressure on the aluminum rod in the extrusion cylinder to make the aluminum rod close to the melting point extrude the shape of the die hole through the die hole of the die. Therefore, extruded aluminum profile is equivalent to the extension of a two-dimensional plane, which can be extended infinitely in theory. However, due to the length limitation of the equipment, the later operation of long material is difficult. Generally, the extruded aluminum profile is no more than 6m long. Then cut according to the actual size.
The principle of die casting is to melt the aluminum alloy completely, then inject it into the three-dimensional aluminum shell mold, maintain a certain pressure, open the mold after cooling, and a die-casting aluminum alloy shell is completed. The appearance of die-casting aluminum shell is richer.
It can be seen from the above that the extruded aluminum shell can only change the shape in the two-dimensional section, while the die-casting aluminum shell can change the shape in any part of the three-dimensional. Die cast aluminum can be made into a hollow ball, while extruded aluminum can only be made into a hollow circular tube, and its two ends are connected. Therefore, the two ends of the extruded aluminum shell will be sealed with covers or aluminum plates. The die cast aluminum shell can be made into the shape of a box, which is covered with a cover plate. But our extruded aluminum shell is still more common than die-casting aluminum shell. Why?
Because the cost of die-casting aluminum mold is expensive, and the production efficiency is lower than that of extruded aluminum profile, the processing cost is also relatively high. In some cases where waterproof sealing is required, die-casting aluminum shell will be used.
Post time: May-05-2022