Injection Molding
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Gloss fluctuation affects appearance quality consistency
Problem Phenomenon
Gloss fluctuation affects appearance quality consistency
Cause Analysis
Mold surface condition changes (wear/contamination), gloss fluctuation
Mold temperature fluctuation affects melt replication of the mold surface
Injection speed changes affect surface flow and gloss
Raw material batch differences affect gloss
Large gloss difference between natural color and modified cellulose acetate butyrate
Solution
Maintain the mold surface, regular polishing
Stabilize the mold temperature in the 40-80°C range
Stabilize injection speed
Control raw material batch consistency
Control standards for natural color and modified gloss separately
Key Takeaway
Gloss requires stable mold temperature and mold surface
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