Material Drying
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Internal Voids of CMC
Fenómeno do problema
Voids of 1-3mm appear inside CMC products, concentrated in the center of thick walls
Análise das causas
Holding is insufficient and the center of the thick wall is not compacted; entrapped gas cannot be discharged; raw material moisture vaporizes
Solução
1)Increase holding pressure 60-80MPa for full compaction; 2)Increase mold venting; 3)Fully dry raw material
Conclusão principal
Internal voids are caused by insufficient holding and gas entrapment; high-pressure holding and venting are the key
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