Now, most people know that stainless steel precision casting, also known as investment casting or wax film casting, is widely used in various types of castings, but these small problems are often encountered in the casting process.
1. Hammer stuck
solution:
a. In production, the temperature is often measured to avoid the excessive temperature of the hammerhead and the barrel;
b. Select high-quality, impurity-free alloy materials to prevent impurities from sticking to the hammer.
2. The injection head is stuck in the gooseneck
solution:
When the equipment is at room temperature, try to turn the hammer head. If it cannot be rotated, replace the cylinder and take out the hammer head. If you want to solve the stuck problem quickly, the best thing is the refill pot.
3. When the material is beaten, it will not be able to beat dozens of mold materials, and it will take a few minutes before continuing to beat the material.
solution:
See if there are bright spots at the top of the blanking head. If all sections are gray, it means that the nozzle is blocked. The temperature of the nozzle can be appropriately increased, and the time when the nozzle is separated from the nozzle can be reduced by 0.1 to 0.2 seconds, and the cooling water of the fixed mold is slightly turned off. .
4. It is easy to crack when die-casting thin-walled products
solution:
If this problem occurs, it may be due to material problems or poor mold opening or improper selection of process parameters. Try to control the proportion of waste not to exceed 30%. The mold retention time should not be too long, about 3s per mm of wall thickness, and the ejection delay cannot be Long, generally 0.5-2s.
5, the material is hard, and the tool is easy to wear
solution:
The proportion of virgin materials, no recycled materials, and gemstone blades specially produced for cemented carbide.
6. Aluminum die castings have black spots when they are polished
solution:
Reduce the concentration of the spraying agent and use another spraying agent, or lengthen the blowing time after spraying.
7. Metal splashing during die casting
solution:
Reinstall the mold; increase the clamping force, adjust the die-casting machine to keep the moving and fixed mold mounting plates parallel to each other; add a support plate on the moving mold to increase the rigidity of the sleeve plate.
8, die castings have patterns after anodizing
solution:
Uneven distribution of spraying and injection oil, improper high-speed switching position, or excessive copper ion content in the oxidation tank will cause pattern problems. Therefore, spraying and injection oil can be spread evenly and not gathered locally, or set the high-speed switching position to reduce the undercasting phenomenon.
9, die-casting mold sticky material
solution:
a. Check whether the mold temperature is normal, and moderately reduce the pouring temperature of the alloy liquid and the mold temperature;
b. Check whether the release agent ratio is abnormal, and try to replace the release agent;
c. Debug the surface of the spraying position for polishing, and carefully polish the nitrided mold to prevent the nitride layer on the surface from being damaged, resulting in a situation where the more it is thrown and the more sticky it becomes;
d. Improve the design structure of the gating system to avoid the continuous erosion of the cavity wall or core by the alloy liquid;
e. Modify the mold cooling system;
f. Adjust the die-casting process parameters, appropriately reduce the injection speed, and shorten the second-speed stroke.