Molds & Tooling
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PBT hot runner management
Problem Phenomenon
Frequent hot runner related problems.
Cause Analysis
Uneven hot runner temperature or material accumulation in dead corners; PBT crystallizes fast and is sensitive to temperature.; when troubleshooting on site, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
Solution
①Calibrate hot runner temperature; ②dead-corner-free design; ③regular cleaning; ④shorten residence.; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
Key Takeaway
Hot runner management is PBT quality assurance.; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for similar problems in the future
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