In the process of die-casting production, the formed die-casting molds actually have to bear a lot of pressure, and the forming conditions are very strict. They are also subjected to repeated mechanical wear, chemical corrosion, and thermal fatigue, often resulting in excessive thermal stress, to cracks on the surface of the molds. So, what issues should be paid attention to in the use and maintenance of these die-casting mold manufacturing? Die casting mold manufacturing
1. The shell and aluminum foil that appear during the use of the mold are quickly removed to prevent them from being screwed into the mold
In the process of using the mold, due to various reasons, the mold can be covered with aluminum sheets. If not recycled, production will continue and the mold will be crushed, especially in the case of sliding parts. If the sliding channel is placed in the aluminum sheet, the merging force of the pressure casting machine is very large, which is easy to slide and damage.
Therefore, in the face of such problems, it is necessary to immediately organize the mold, identify the cause, and repair the mold in a timely manner. Otherwise, if the mold is damaged and not repaired, it will have a serious impact on the lifespan of the mold.
2. Reduce the rapid cooling and heating of the mold, continue production, and do not tell the injection when the mold is in a cold state
During the die-casting process, the mold is in a reciprocating fatigue state of thermal shrinkage, and the temperature of the cavity in the mold changes multiple times between 160 ° C and 350 ° C.
In addition, when starting production in the cold mold state, the mold temperature rises from low temperature, the temperature difference expands, the mold fatigue increases, and the mold life shortens. Therefore, during die casting production, continuous production should be carried out as much as possible to reduce the rapid cooling and heating of the mold and extend its lifespan.
In addition, in the cold mold state, if the mold does not reach the temperature required for normal production, the gaps between different parts of the mold are relatively large. In this case, it is strictly prohibited to set high-speed injection or pressurization to on. Otherwise, the mold, including the slider, cap hole, and other parts, may easily penetrate into the aluminum skin, damage the mold, and affect its service life.
3. Reduce compression speed, decrease compression ratio, and reduce mold impact
During die-casting production, the speed of injection not only affects the filling speed of die-casting, but also affects the shilling speed inside the injection.
Therefore, due to the high pressure speed and the fast compression of the internal irradiation port, the peak impact of the mold brush is strong, and the impact force borne by the mold increases, resulting in a significant reduction in the mold's lifespan.
When adjusting the die-casting process, it is important to reduce the injection speed as much as possible while ensuring product quality, improve mold life, and enhance the economic benefits of die-casting.
Nowadays, the press machine is equipped with a pressure braking device to reduce the peak impact and the impact force on the mold, which is beneficial for improving the life of the mold. Injection is a more important indicator in the die casting process than pressure, but it not only affects the quality of the mold, but also has a significant impact on the life of the mold.
4. Try to reduce the temperature of the aluminum liquid as much as possible and improve the service life of the mold
The injection temperature of aluminum liquid during die casting production not only affects the casting, but also affects the service life of the mold.
When pressing a gun, the temperature generated by the aluminum liquid is 630-720 degrees Celsius. For different components, we choose the temperature generated and choose the possible one. While saving this energy, it can also extend the service life of the pressure gun type.
The higher the temperature of the aluminum liquid, the more intense the corrosion on the mold. Therefore, the range of temperature changes in the mold is wider, and the thermal expansion and contraction are more intense. The mold fatigue is greater, and it is more prone to damage. Properly reducing the temperature of the aluminum liquid can help extend the mold.
5. In order to strengthen the mold, perform regular maintenance, and handle tempering stress on the regular cavity
Die casting molds are produced continuously under high pressure, high speed, and high temperature, and the usage conditions are relatively harsh. During use, the molds may be damaged and defective. In order to strengthen the protection of the molds, regular maintenance, damaged parts, vulnerable parts, cleaning of the interior, top punching, etc. of the molds are replaced. It is very important to ensure the reliability of mold gun production and also extend the service life of the same molds.
NINGHAI SAI YUE METAL PRODUCTS CO.,LTD
Phone: +86-15088690602
E-mail: [email protected]
Address: No. 26 Jinshan 5th Road, Ninghai County, Ningbo City, Zhejiang Province
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