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Three precautions for the use of die casting die
Addtime ：2022-03-20 | Source：Dongguan Mairui De Metal Technology Co., LTD
China's precision die casting and casting industry has great development potential. Enterprises have made continuous progress in production and product design technology. In recent years, they have also made greater strides towards automation to increase efficiency and competitiveness. However, while facing opportunities, they are also accompanied by great challenges. Now, automotive, electronics, communications, metals, aerospace and other fields have put forward higher requirements for the precision die casting industry.
For example: large automobile precision die casting and its die technology; Precision die casting of high melting point metals such as copper alloy and stainless steel and its die life; Aluminum alloy high efficiency precision die casting, equipment and dies; Practical and effective calculation technology of gating system; Improve the reliability of metal melt filling flow pattern simulation to ensure the quality of large and complex precision die castings; Low cost and rapid manufacturing technology of precision die casting die with multiple varieties and small batch production. Facing this situation, China's precision die casting industry should be calm, calm and positive to meet the needs of the industry to the greatest extent.
We will mainly talk about three points that should be paid special attention to in the use of aluminum alloy precision die casting die:
First, the use of mold cooling system. When the mold cooling water is used correctly, it not only prolongs the service life of the mold, but also improves the production efficiency. In actual production, we often ignore its importance, and the operators also try to save trouble. If it is too troublesome to connect, they don't connect the cooling water pipe. Some companies even don't want cooling water in order to save cost when customizing molds, resulting in very serious consequences.
Mold materials are generally made of special mold steel through various treatments. No matter how good the mold steel is, it also has the limits of their use, such as temperature. When the mold is in use, if the mold temperature is too high, it is easy to make turtle cracks appear on the surface of the mold core early. In some molds, turtle cracks appear in a large area even before more than 2000 mold times. Even in the production of the mold, because the mold temperature is too high, the mold core has changed color, and even reached more than 400 degrees after measurement. When such temperature meets the state of release agent cooling, turtle cracks are easy to appear, and the produced products are also easy to deform, strain and stick to the mold. In the case of using mold cooling water, the use of release agent can be greatly reduced, so that the operator will not use release agent to reduce the temperature of the mold. Its advantage is to effectively prolong the service life of the die, save the precision die-casting cycle, improve the product quality, reduce the occurrence of die sticking, strain and aluminum sticking, and reduce the use of release agent. It can also reduce the loss of ejector rod and core caused by mold temperature overheating.
2、 If the mold is equipped with neutron control, pay attention to absolutely prohibit the phenomenon of joint on the signal line between the precision die casting machine and the mold. The reason is very clear. In daily production, it is difficult to avoid water on the signal line, or the place where the joint is wrapped is easy to be broken, resulting in short circuit with the machine tool. If the signal is wrong, the alarm will be given, the automatic shutdown will delay the time, or the signal will be disordered and the mold will be damaged. Cause unnecessary losses. The travel switch shall be waterproof.
Three, the mold must be preheated in the process of starting production to prevent the occurrence of cracks in the cold mold suddenly encountered hot metal liquid, the more complex mold can be used with blende, liquefied gas, good condition with mold temperature machine, relatively simple mold can be used slow pressure jet preheating.
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