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2022
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The foundry will discuss common problems and related solutions in the precision casting process.
I believe most people now know about stainless steel investment casting, also known as lost-wax casting, which is widely used in various castings, but it is inevitable to encounter a series of problems during the casting process. Below, the foundry will discuss common problems and related solutions in the investment casting process.
I believe most people now know about stainless steel precision casting, also known as investment casting or lost wax casting, which is widely used in various castings. However, a series of problems are inevitable during the casting process. Below, the foundry will discuss common problems and related solutions in the precision casting process.
Problem 1: The hammerhead is stuck
Solution:
1. In production, measure the temperature frequently to avoid excessive temperature of the hammerhead and tube;
2. Choose excellent alloy materials without impurities to prevent impurities from sticking to the hammerhead.
Problem 2: The injection head is stuck in the gooseneck tube.
Solution:
The foundry believes that when the equipment is at room temperature, try turning the hammerhead. If it doesn't turn, change to a starter and take out the hammerhead. If you want to quickly solve the problem of stalling, it is better to use an oil can.
Problem 3: You can't hit dozens of molds with the material. You have to wait a few minutes before you can continue hitting the material.
Solution:
Check if there are any bright spots on the top of the blanking head. If all sections are gray, it means the nozzle is blocked. You can moderately increase the temperature of the nozzle, reduce the nozzle breaking time by 0.1 to 0.2 seconds, and slightly close the cooling water of the fixed mold.
Problem 4: Thin-walled parts are prone to cracking during die-casting.
Solution:
The foundry believes that this problem may be caused by material problems, bad mold opening, or improper selection of process parameters. Try to control the waste ratio to not exceed 30%, the mold dwell time should not be too long, about 3s per millimeter of wall thickness, and the ejection delay should not be too long, generally 0.5-2s.
Problem 5: The material is hard and the tools are easily worn.
Solution:
Replace recycled materials with raw materials and use gem blades specially produced for hard alloy.
Problem 6: There are black spots when polishing aluminum die-casting parts.
The foundry believes the solution is:
Reduce the concentration of the spray and use other sprays; or extend the blowing time after spraying.
Problem 7: Metal splashes during die-casting.
The foundry believes the solution is:
Reinstall the mold; increase the clamping force, adjust the die-casting machine, and keep the moving and fixed mold mounting plates parallel to each other; add a support plate to the moving mold to increase the rigidity of the sleeve plate.
Problem 8: Die-casting mold sticking
The foundry believes the solution is:
1. Check whether the mold temperature is normal, and appropriately reduce the pouring temperature of the fused alloy and the mold temperature;
2. Check whether the release agent ratio is abnormal and try to replace the release agent;
3. Debug and polish the surface of the spraying position, carefully polish the nitrided mold to prevent the surface nitrided layer from being damaged, forming a situation where the more it is polished, the more sticky it becomes;
4. Improve the design structure of the gating system to avoid continuous erosion of the cavity wall or core by the fused alloy;
5. Modify the mold cooling system;
6. Adjust the die-casting process parameters, appropriately reduce the injection speed, and shorten the two-speed stroke.
If you want to know more about this, you can contact our foundry. We have many years of experience in this industry and can introduce you to more relevant content.
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Shandong Gongchen Machinery Technology Co., Ltd.
Contact QQ: 258506508
Mobile Number:15621618888
Phone:0536-7691368 7691229
Fax: 0536-7691229
Contact Email:guisongzhng8@gmail.com
Website:www.shandonggongchen.com Gongchen.China Valve Castings.China
Address: Mucun Town, Fangzi District, Weifang City, Shandong Province
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