Temperature control method of aluminum alloy die-casting mold

In the aluminum alloy die-casting production process, temperature is one of the core process elements. The quality of die-casting mold temperature control directly affects product quality and production efficiency. The choice of die-casting mold temperature control method is particularly important.　　1. Preface 　　 With the vigorous development of the automobile industry, it has brought more opportunities and new challenges to the die casting industry. In die-casting production, mold temperature has an important impact on casting quality, mold life and production cycle. Therefore, in modern die-casting technology, mold temperature control is an indispensable process method. This article focuses on the importance of die-casting mold temperature. , Principles, control methods are explained, and a set of die-casting mold temperature control methods selected for the control method are briefly analyzed. 2. The importance of die-casting mold temperature and control principles (1) The importance of die-casting mold temperature Die-casting molds are the molding process equipment in the casting production process. Whether the temperature field distribution established in the mold is stable or not is critical to the quality of castings, production efficiency, and The service life of the mold has an important impact, which is directly related to the cost and economic benefits of casting production. The temperature field in the mold must be within the range of process requirements, so that castings with qualified appearance and internal quality can be obtained. On the contrary, if the temperature is too high, defects such as strains and bubbles will be formed, which will extend the cooling time and reduce production efficiency; if the temperature is too low, it will Defects such as cold barrier, insufficient pouring, pores, etc. occur. Die-casting molds are produced under high temperature and high pressure environment for a long time. If the mold temperature field is unstable, long-term periodic thermal expansion and contraction, the mold is more prone to failure, greatly shortening the service life and reducing production efficiency. (2) Die-casting mold temperature control principle During the casting process, the heat exchange between the mold and the molten metal achieves an ideal heat balance, that is, the mold absorbs heat and discharges heat equal to achieve dynamic heat balance. After the process is selected, the mold temperature reaches the working temperature of the casting. Scope, fixed-point cooling is carried out on the places that are easy to form hot spots to promote the formation of heat balance.　　3, hot joint 　　 (1) generation location: the casting structure has the highest temperature during the die-casting molding process, and it is easy to form shrinkage cavities, shrinkage porosity and stress concentration locations during the cooling process.