Methods to prevent defects in die castings
Publish Time: 2024-09-04
Here are some methods to prevent defects in die castings:
1) 1. Increase mold temperature 2. Adjust the cross-sectional area or position of the inner runner 3. Adjust the speed and pressure of the inner runner 4. Properly select the coating and adjust the dosage
2) 1. Correctly select the die casting mold material and heat treatment process 2. The pouring temperature should not be too high, especially for high melting point alloys 3. The mold should be fully preheated 4. The die casting mold should be annealed regularly or after a certain number of die castings, and the surface of the molded part should be polished
3) 1. The alloy should not be overheated 2. Increase the mold temperature and reduce the pouring temperature 3. Strictly control the alloy composition within the allowable range
4) 1. Pay attention to the ratio of alloy materials. The impurity content should not exceed the starting point requirement 2. Adjust the mold opening time 3. Make the push rod force uniform 4. Change the uneven wall thickness
5) 1. Correctly control the alloy composition, in a certain In some cases: pure aluminum ingots can be added to the alloy to reduce the magnesium content in the alloy; or aluminum-silicon intermediate alloy can be added to the alloy to increase the silicon content 2. Increase the mold temperature 3. Change the casting structure 4. Adjust the core pulling mechanism or make the push rod force uniform
6) 1. Add pure magnesium to the alloy to reduce the aluminum-silicon content 2. The mold temperature should be controlled within the required range 3. Improve the casting structure to eliminate the section with large thickness changes 4. Adjust the core and push rod to make it balanced
7) 1. Ensure the chemical composition of the alloy. The alloy elements take the lower limit: When preparing silicon brass, the silicon and zinc contents cannot take the upper limit at the same time 2. Increase the mold temperature 3. Appropriately control and adjust the mold opening time
8) 1. Change the casting structure to eliminate metal accumulation and large cross-sectional changes 2. Reduce the pouring temperature under possible conditions 3. Increase the injection pressure ratio 4. Appropriately improve the pouring system to make the pressure better transmitted
