Injection Molding
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CMC injection demolding difficult
Fenómeno do problema
The demolding force of the CMC injection molded part is large, the part is deformed or strained, and the demolding time accounts for 30% of the cycle
Análise das causas
The adhesion between CMC and the mold cavity is large; the draft angle is insufficient <0.5°; the cooling time is insufficient and the part is demolded before being fully solidified; the ejection mechanism design is unreasonable
Solução
1) Increase the mold draft angle to 1-2°; 2) Extend the cooling time so that the part is demolded after being fully solidified; 3) Polish the mold surface to Ra<0.2μm; 4) Increase the ejection area and use a large-area ejector plate; 5) Spray release agent (temporary solution)
Conclusão principal
Difficult demolding is caused by adhesion and insufficient mold design; increasing the draft angle is the fundamental measure
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