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Casting problem--There are 2.6mm pores in oil sealing groove after processing

September 18, 2024
Casting information
Casting information
2. Casting photographs
Casting photographsCasting photographs
3. Cast analysis 
1. The machining allowance is too much, due to the product structure and mold arrangement, can not do the slider to reduce the machining allowance.
2. The casting is a round deep cavity wide skirt casting. Due to the filling angle, the metal flow has not reached the deep cavity position and the airway has been blocked, resulting in the air in the cavity cannot be effectively discharged, and wrapped gas.
4. Improvement 
It is recommended to re-open the mold, and use the three-plate mold to pour in the middle to preferentially form the deep cavity position. The metal flow from the middle to the outside can effectively discharge the air in the cavity to achieve the purpose of improvement. 
5. Tips
About punch lubrication:
The amount of punch lubrication should be appropriate. If the end face of the punch appears blackening, it indicates that punch lubrication is added too much or the punch lubrication is inferior (more residues), and the improvement should be reviewed in time. It is recommended that the blackening length should not be greater than half of the thickness of the cake.
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