Extrusion & Post
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PVB Thickness Unevenness
Problem Phenomenon
PVB film thickness is uneven in transverse and longitudinal directions, laminated glass optical and structural performance is affected.
Cause Analysis
T-die precision and adjustment; thickness control, even small deviations affect laminated glass quality; automatic thickness monitoring system missing or failed; uneven die lip gap.
Solution
①Precision T-die design and maintenance; ②Closed-loop control of automatic thickness monitoring system; ③Precise die lip gap adjustment; ④Online thickness uniformity detection.; After adjustment, continuously sample to verify the effect, confirm stability before resuming mass production
Key Takeaway
PVB thickness uniformity is the premise of laminated glass quality; automatic monitoring is standard; die maintenance ensures long-term precision.; After confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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