The essence of zinc alloy die-casting is that the liqui […]
The essence of zinc alloy die-casting is that the liquid alloy is filled into the die-casting mold cavity in a very short time at a very high speed through the movement of the injection punch under the action of high pressure, and the casting is crystallized and solidified to obtain the casting.
Due to the use of metal molds, die castings have high dimensional accuracy, smooth surfaces, clear contours, and excellent surface quality; as well as internal quality of dense tissue, high strength and hardness. Die casting is suitable for manufacturing non-ferrous metal castings with complex shapes, thin walls and large batches. It is a high-education, advanced precision part forming technology.
How to properly store zinc alloy?
Storage of zinc alloy ingots in a humid and dirty environment will increase zinc slag, reduce the amount of effective alloys, and reduce the quality of zinc alloy die-casting products. Therefore, the environment in which zinc alloy ingots are stored should be managed.
1. Ensure that the stacking area is clean and dry
2. Sampling the zinc alloy before use
What should be paid attention to when using zinc alloy?
Temperature: Recommended furnace temperature Zinc alloy: The upper limit of die casting temperature for thin-walled parts and complex parts can be taken. The higher the furnace temperature, the higher the amount of slag.
Experienced die-casting unions observe the melt from the following three aspects:
If after scraping the slag, the melt is not too viscous and clear, and the slag is not very fast, indicating that the temperature is appropriate.
If the melt is too viscous, the temperature is low.
After scraping the slag, a layer of white frost quickly appeared on the surface of the liquid. The zinc liquid was red and the slag was too fast, indicating that the temperature was too high and should be adjusted in time.
There is an error between the actual temperature of the furnace of the die-casting machine and the furnace display. The temperature of the furnace should be checked regularly using a portable thermometer.
The conditional central smelting furnace and the die-casting machine furnace are used as the holding furnace, so as to avoid the large temperature change caused by the direct addition of zinc ingots in the zinc pot to melt. Centralized smelting can ensure the stability of alloy composition. Or adopt an advanced metal liquid automatic feeding system, which can maintain a stable feeding speed, alloy liquid temperature and zinc pot liquid level height.
If the feed is directly added in the zinc pot, it is recommended to add the entire alloy ingot at one time to add small alloy ingots multiple times to reduce the temperature change caused by the addition.
The zinc alloy ingot needs to be pre-heated.
Peripheral tools: Iron crucibles are not allowed. Iron operating tools are not allowed to contact the alloy liquid. Stainless steel spoons should be used.