Processing Machinery
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PSU Transparency and Coloring
Problem Phenomenon
[Problem Phenomenon] PSU transparent parts have an amber tint; color matching accuracy and heat-resistant colorant selection are difficult
Cause Analysis
PSU natural color is light amber; near-water-white grades are available; colorants must withstand processing temperatures above 350°C; both transparent and opaque coloring are limited by heat resistance; During on-site troubleshooting, verify item by item according to this mechanism, avoiding blindly adjusting the machine based solely on experience
Solution
Select near-water-white grades for high transparency requirements; screen colorants for heat resistance above 350°C; compare colors of first articles under standard light source; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
Key Takeaway
For PSU coloring, first select the natural color grade; colorant heat resistance of 350°C is the threshold; After confirming effectiveness, solidify the parameters and practices into the work instructions to prevent recurrence; Include this case in the defect archive as a reference for troubleshooting similar problems in the future
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