Molds & Tooling
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PC/ABS weld line
Problem Phenomenon
Weld lines are obvious and low in strength.
Cause Analysis
The front temperature of the two flow fronts is low and fusion is poor; low mold temperature and slow speed both aggravate it.; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based on experience alone
Solution
①Raise melt and mold temperature; ②optimize gate position; ③increase confluence speed; ④set venting and overflow wells.; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
Key Takeaway
Weld line management relies on temperature and gate; high mold temperature is particularly effective for PC/ABS weld lines.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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