Precautions in the Use of Aluminum Alloy Die Casting Dies

Special attention shall be paid to the following points during the use of aluminum alloy die casting die:

1. Cleaning the parting surface of the mold is very troublesome and easy to ignore. If the boss has a high starting point and buys a good mold, it will be much easier to work. If the mold quality is not good, there will inevitably be flash or dirt on the parting surface of the mold during production. The operator should often clean these parts and equip a small shovel at any time. If the flash is not removed in time, the parting surface of the mold is easy to collapse, resulting in aluminum leakage in the production process. Once this happens, no matter how good the mold repair experts are, the possibility of complete repair is very small, not that they have no skills. The consequences caused by aluminum leakage not only increase the die casting cost, waste the white aluminum, and the product quality is unstable, especially the internal quality, but also increase the difficulty of determining the process parameters, and the qualification rate will decrease a lot. From the perspective of safety, the rate of work-related injuries will increase. During the shift change, the operator shall thoroughly clean the mold parting surface with kerosene, which can not only prevent the mold from being squeezed, but also open the vent slot blocked by the residue of release agent or other dirt on the mold after cleaning, which is conducive to the discharge of gas in the cavity during the injection process to improve the product quality. It is better for a team to clean the parting surface twice. Let employees develop a good habit.

2. When each team takes over the shift, they should carefully carry out the spot inspection according to the Mold Spot Inspection Form of the company, and solve the problems found in time to avoid causing unnecessary trouble to themselves.

3. Use of mold cooling system. Mold cooling water can not only prolong the service life of the mold, but also improve the production efficiency when used correctly. In actual production, we often neglect its importance. Operators also try to save time. It is too troublesome to connect the cooling water pipes. Some companies even don’t need cooling water to save costs when customizing molds, which has caused serious consequences. Die materials are generally made of special die steel through various treatments. The best die steel has its limits, such as temperature. When the mold is in use, if the mold temperature is too high, it is easy to make the surface of the mold core crack early, and some mold cracks appear in a large area even before the mold times exceed 2000. Even the mold core has changed color due to the high mold temperature during the production, even reaching more than 400 degrees after measurement. Under such temperature, when encountering the cold state of the release agent, it is easy to have turtle cracks, and the products produced are also easy to deform, strain, and stick to the mold. In the case of using mold cooling water, the use of mold release agent can be greatly reduced, so that the operator will not use the mold release agent to reduce the temperature of the mold. Its advantages lie in effectively extending the service life of the mold, saving the die casting cycle, improving the product quality, reducing the occurrence of die sticking, pulling and aluminum sticking, and reducing the use of release agent. The utility model can also reduce the loss of the ejector rod and the core caused by the overheating of the die temperature.

4. The mold must be preheated during the beginning of production to prevent the occurrence of cracks caused by sudden encounter of hot metal liquid in cold mold. For more complex molds, blowtorch and liquefied gas can be used, for better conditions, mold temperature machine can be used, and for simpler molds, slow injection can be used for preheating.

5. If the mold is equipped with neutron control, it is absolutely forbidden to have a joint on the signal line between the 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 bound is easy to break, which causes a short circuit with the machine tool. If the signal is wrong, it may cause an alarm and automatic shutdown to delay the time, or it may cause a signal disorder, which may damage the mold. Cause unnecessary losses. The travel switch shall be waterproof.