How to make die casting molds safely
Publish Time: 2024-04-30
Die casting die is a method of casting liquid forging, which is a process completed on a dedicated die casting die forging machine. It is also a process for manufacturing die-casting molds. Most die-casting castings are free of iron, such as zinc, copper, aluminum, magnesium, lead, tin, and lead-tin alloys and their alloys. Common die-casting alloys: zinc alloy die-casting and aluminum alloy die-casting
The control of surface temperature of die-casting molds is very important for producing high-quality die-casting parts. During the production process, the casting is deformed due to ejection, resulting in defects such as thermal pressure, mold sticking, surface depression, internal shrinkage, and hot bubbles. When there is a significant difference in mold temperature, it has varying degrees of impact on variables in the production cycle, such as filling time, cooling time, and spraying time.
1. Cold streaks: mainly due to the low temperature at the front end of the molten soup, there are traces when overlapping
2. Cracks: They are caused by shrinkage stress, which causes them to crack when pushed out or straightened
3. Pores: Pores are the source of air mixed in the molten soup, during melting, in the material tube, in the mold, and as release agents
4. Cavitation: Due to a sudden decrease in pressure, the gas in the molten soup suddenly expands, impacting the mold and causing damage to the mold
5. Shrinkage: When a metal solidifies from a liquid state to a solid state, the space occupied becomes smaller. If there is no metal supplement, shrinkage will form. It usually occurs at slower solidification points
