How to replace broken sealing wire and PTFE heating insulation cloth of vacuum packaging machine

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When a vacuum packaging machines have a problem, such as no vacuum, or no sealing, it is very much possible that the sealing wire is broken, or the PTFE heating insulation cloth is wrinkled/burned out.
Replacing heat-sealing wire and PTFE cloth of vacuum packaging machine is a routine skill for machine operators or company engineer team.