In the production process of die-cast aluminum accessories, how to control the die-casting temperature to ensure product quality?
Publish Time: 2025-02-26
In the production process of die-cast aluminum accessories, the control of die-casting temperature is the key link to ensure product quality. Temperature not only affects the fluidity and filling of aluminum liquid, but also directly affects the mechanical properties, dimensional accuracy and service life of the casting. Therefore, in the production of die-cast aluminum accessories, the die-casting temperature must be strictly controlled.First of all, the die-casting temperature mainly includes the pouring temperature of the molten metal and the working temperature of the mold. The pouring temperature refers to the temperature of the molten metal when it enters the mold cavity from the pressure chamber. This temperature is usually achieved by controlling the temperature of the alloy liquid in the insulation furnace. For castings of different shapes and structures, the pouring temperature needs to be flexibly adjusted. For example, for thin-walled complex parts, in order to improve the fluidity of the molten metal to obtain a good molding effect, a higher pouring temperature can be used; while for thick-walled structural parts, in order to reduce solidification shrinkage, a lower pouring temperature can be used. However, it should be noted that if the pouring temperature is too high, the amount of air inhaled in the aluminum liquid will increase, which may cause defects such as pinholes and shrinkage cavities, and accelerate the corrosion and aging of the mold; if the pouring temperature is too low, the metal liquid will have poor fluidity, which may cause defects such as cold shut and flow lines.Secondly, the mold temperature is also crucial to the quality of die-casting parts. If the mold temperature is too low, the fluidity of the alloy liquid in the mold cavity will decrease, resulting in poor filling of the casting, larger shrinkage, and reduced surface quality; if the mold temperature is too high, the mold will be easily deformed, shortening its service life, and affecting the effect of the release agent, which may cause defects such as sticking. Therefore, in the continuous die-casting process, the thermal balance of the mold must be maintained so that the temperature of each part of the mold is kept within the appropriate process range. This is usually achieved through a mold temperature adjustment system, such as cooling the mold by water cooling or air cooling, or preheating and temperature control of the mold using a mold temperature controller.In addition, in the production process of die-cast aluminum accessories, attention should also be paid to the stability and uniformity of temperature control. Excessive temperature fluctuations will lead to unstable casting quality, so an advanced temperature control system is required to monitor and adjust the die-casting temperature in real time. At the same time, the preheating and insulation of the mold also need to be strictly controlled to ensure that the mold temperature is evenly distributed and avoid casting quality problems caused by uneven temperature.In summary, the control of die-casting temperature during the production of die-cast aluminum accessories is an important link to ensure product quality. By strictly controlling the pouring temperature and mold temperature, and using an advanced temperature control system for real-time monitoring and adjustment, high-quality die-cast aluminum accessories can be produced.
