Processing Machinery
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LDPE Film Dual-lip Air Ring Retrofit
Problem Phenomenon
With a single-lip air ring, bubble stability is poor and thickness deviation is large; after switching to a dual-lip air ring, it improves significantly.
Cause Analysis
The single-lip air ring has concentrated cooling and large airflow impact; the dual-lip air ring focuses cooling to solidify the bubble layer synchronously, and actual measurements show it can reduce bubble instability by about two-thirds.; During on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience.
Solution
①Evaluate upgrading to a dual-lip air ring; ②Choose a rotating air ring when necessary to absorb viscosity fluctuation impact; ③Match the air ring with the film type; ④Stabilize cooling air volume.; After adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability.
Key Takeaway
Air ring structure upgrade is the hardware solution for stability; the dual-lip air ring significantly improves thickness accuracy in high-speed production.; After confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
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