Processing Machinery
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PC/ABS melt temperature too high degradation
Problem Phenomenon
Parts yellow and embrittle, performance declines.
Cause Analysis
Polymer degrades when melt temperature exceeds 300℃; validated setpoint deviations cause internal stress and mechanical property damage.; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based on experience alone
Solution
①Control melt temperature within the 240~280℃ window; ②strictly prohibit exceeding 300℃; ③calibrate the thermocouple to measure the actual melt temperature; ④shorten the residence time.; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
Key Takeaway
PC/ABS requires strict thermal management; 240~280℃ is the industry standard window, exceeding temperature means degradation.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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