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Casting problem -- Inner wall of pillars have pores after processing

September 20, 2024
Casting information
Casting information
2. Casting photographs
Casting photographs
Casting photographs
3. Cast analysis 
In this case, due to the reason of ranking (one mold has four cavities), the selection of location for runner layout is limited, and the principle of giving priority to forming deep cavities is not achieved, resulting in poor air discharge in deep cavities.
Location of forming preferentially diagram
4. Improvement 
The existing slider is increased to the cylindrical port of the deep cavity, and the overflow groove is arranged from the port to discharge the deep cavity air to the parting surface. 
Diagram of slagging and exhausting in slider
5. Tips
About deep cavity exhaust:
The forming of the deep cavity can be prioritized, and the gas cannot be vented is preferentially expelled from the cavity; if it is not possible to form first, the exhaust space is manufactured by using the slider or the exhaust core for exhaust.
 
 
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