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Casting problem-- Severe erosion of the inner gate

September 20, 2024
Casting information
Casting information
2. Casting photographs
Casting photographsCasting photographs
3. Cast analysis 
The casting is a four-side slider mold structure. Due to the product structure, the position of the gate can be selected is limited, and the filling of the four gates is not synchronized. The small cross sectional area of the gate is too fast, which is the main cause of the defect. 
 
4. Improvement 
1. The method of thickening the gate increases the cross sectional area of the gate, and the total cross sectional of the four gates is about 1/13 of the punch; reduce the gate speed.
2. Die Casting process adjustment: adjust the starting position of the fast injection to the front two gates to do some pre-filling position, reduce the risk of the flow channel being involved in the gas, and ensure the synchronous filling effect of the six gates to the maximum extent.
 
Improvement
5. Tips
About erosion:
The influence of gate speed on erosion is very large: high-speed friction itself has a great effect on the temperature rise of steel near the gate; hitting the side wall near the gate also convert kinetic energy into heat; he increase of steel temperature will further reduce its erosion resistance.  
 
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