Injection Molding
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Obvious Surface Color Difference of CMC
Problem Phenomenon
Different parts of CMC products have varying color depth, with color difference ΔE>5
Cause Analysis
Color masterbatch is dispersed unevenly; pigment orientation during injection causes uneven color distribution; barrel temperature fluctuations cause color changes
Solution
1)Masterbatch method for color masterbatch to ensure uniform dispersion; 2)Reduce injection speed to reduce pigment orientation; 3)Stabilize barrel temperature ±2°C
Key Takeaway
Color difference is caused by uneven dispersion and orientation; masterbatch method and stable processing are the key
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