Processing Machinery
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EVA Hot Melt Adhesive Carbonization and Skinning
Problem Phenomenon
The adhesive surface in the glue tank skins and carbonizes, blocking the nozzle.
Cause Analysis
The adhesive is exposed to high temperature for a long time and oxidizes and carbonizes; when the glue tank level is low, the exposed area increases and skinning accelerates.; During on-site troubleshooting, verify item by item according to this mechanism to avoid blindly adjusting the machine based only on experience
Solution
①Keep the glue tank at an appropriate level; ②lower the holding temperature when not in use; ③regularly clean the glue tank; ④avoid repeated heating and mixing of new and old adhesive.; After adjustment, continuously sample to verify the effect, and resume mass production after confirming stability
Key Takeaway
Carbonization and skinning is a cumulative problem of thermal management; liquid level and holding temperature management can prevent it.; After confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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