Molds & Tooling
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Insufficient Flatness of CMC
Problem Phenomenon
Flatness of CMC flat products >0.5mm/100mm, warped
Cause Analysis
CMC shrinkage is large and different in each direction; mold cooling is uneven; residual stress release causes continuous warpage
Solution
1)Uniform mold temperature to reduce temperature difference; 2)Increase holding pressure to reduce shrinkage differences; 3)Annealing to release residual stress
Key Takeaway
Insufficient flatness is caused by shrinkage differences and stress; uniform cooling and annealing are the key
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