Material Analysis
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PA12 Melt Temperature Upper Limit Control
Problem Phenomenon
【Problem phenomenon】To improve filling, the temperature was continuously raised, and PA12 products discolored, lost strength, or even decomposed
Cause Analysis
The melt of standard PA12 must not exceed 310℃, and flame-retardant grades must not exceed 270℃; exceeding the upper limit means thermal degradation, manifested as discoloration, bubbles, and decline in mechanical properties
Solution
Set temperature upper limit alarms: 310℃ for standard material, 270℃ for flame-retardant material; for insufficient filling, prioritize adjusting mold temperature and injection speed rather than raising temperature without limit; calibrate the set value with actual melt temperature measurement
Key Takeaway
310℃/270℃ are the double red lines of PA12 temperature, and filling problems should not rely only on raising temperature; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
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