Injection Molding
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Compression molding is used to reduce warpage and internal stress but the parameters are set improperly
Problem Phenomenon
Compression molding is used to reduce warpage and internal stress but the parameters are set improperly
Cause Analysis
Compression timing too early, melt not filling the cavity
Compression timing too late, melt already solidified, compression ineffective
Compression force set improperly, too large flash, too small poor effect
Compression stroke set unreasonably
Cellulose acetate butyrate compression molding parameters need to differ from conventional injection
Solution
Start compression when the melt fills 90% of the cavity
Compression force 80-100MPa, adjusted according to the product
Reasonably set the compression stroke
Adjust compression parameters according to cellulose acetate butyrate characteristics
Compression molding can effectively reduce warpage
Key Takeaway
Compression molding requires precise timing and force control
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