Surface trace control method of cast aluminum parts and the development trend of die-casting process

One of the reasons for the formation of aluminum casting surface traces and control methods
The important reason for the traces of aluminum casting processing is that the traces of different flow rates of liquid metal appear when filling the cavity, or the mold taken is not enough temperature itself and the amount of release agent is too much. To prevent the formation of flow marks, it is necessary that each stream of metal flow for the simultaneous processing of; adjust the mold temperature, expand the overflow groove; adjust the filling speed perfect, modify the liquid metal flow rate; release agent as thin as possible. The important reason for the formation of marks lies in the friction and collision between the mold and the casting. In order to prevent the appearance of the imprint, it is necessary to have a neat and smooth slider, flexible movement between parts, and prevent the appearance of concave and convex phenomenon within the aluminum casting parts. The pusher should be in a part that is small to the shape of the part, and the top range of the pusher stem should be large and smooth, so that end damage can be prevented. An important reason for the appearance of abrasion is that the release slope is insufficient and the surface of the cavity needs to be smooth. In order to prevent this phenomenon, need to fill the process when the filling speed as low as possible, to facilitate the timely adjustment of the parameters, extend the stay in the mold time.
Second, the development trend of the die-casting process
1, high-temperature creep-proof aluminum raw materials
Considering the cost and performance of cast aluminum parts and other issues, aluminum raw materials to develop high-temperature creep-proof performance is with good prospects. For the consideration of rare earth resources and rare earth aluminum large reserves, high temperature creep-proof aluminum raw materials, is conducive to the stable development of China's manufacturing industry.
2、Anti-creep aluminum die-casting process
For die-casting aluminum raw materials to carry out a holistic inquiry, can find this trend, that is, in the aluminum raw materials and research stage, focusing on the adoption of sand and metal casting mode, its specific development of the casting process did not carry out tests under die-casting conditions, and specific application requirements have obvious differences. Therefore, when developing new anti creep aluminum raw materials, need to take into account the die-casting process. In addition, because part of the creep-proof aluminum raw materials use parts have many sexual requirements, still need to improve the current die-casting process.
3, rare earth - magnesium in the alloy of
At present, with the development of technology and materials, for rare earth aluminum die-casting aspects of the inquiry has obtained significant results, but for aluminum - rare earth in the alloy less. Aluminum-rare-earth alloy in the developed has carried out a lot of exploration, for example, the general vehicle enterprises have carried out a lot of exploration of this alloy, and has obtained significant results. After the investigation of the aluminum - rare earth alloy, can in a large extent reduce the aluminum die-casting costs, and improve the quality of cast aluminum parts, for the comprehensive development of modern industry role.