.How to safely make die-casting molds
Publish Time: 2024-07-16
Die-casting molds are a method of casting liquid die forging, a process completed on a dedicated die-casting die forging machine. It is also a process for making die-casting molds. Most die-casting castings are iron-free, such as zinc, copper, aluminum, magnesium, lead, tin, lead-tin alloys and their alloys. Common die-casting alloys: zinc alloy die-casting and aluminum alloy die-casting
Control of the surface temperature of the die-casting mold is very important for the production of high-quality die-casting parts. During the production process, the casting is deformed by ejection, resulting in defects such as thermal pressure, mold sticking, surface depression, internal shrinkage and hot bubbles. When the mold temperature difference is large, it will have different degrees of influence on the variables in the production cycle, such as filling time, cooling time and spraying time.
1. Cold lines: mainly because the temperature of the front end of the molten soup is too low, and there are traces when overlapping.
2. Cracks: It is due to shrinkage stress, and it is cracked by force during ejection or trimming.
3. Porosity: Porosity is the source of air mixed in the molten metal, during melting, in the material tube, in the mold, and in the release agent.
4. Cavitation: Due to the sudden decrease in pressure, the gas in the molten metal suddenly expands and impacts the mold, causing mold damage.
5. Shrinkage: When the metal solidifies from liquid to solid, the space occupied becomes smaller. If there is no metal supplement, shrinkage will form. Usually occurs in the slower solidification area.
