Troubleshooting induction seal problems
Common checks for weak seals, burnt liners, uneven results or intermittent sealing on induction foil sealing equipment.
Weak or incomplete seals
Check liner compatibility, cap torque, sealing head height, conveyor speed, power setting and container mouth condition. A dirty rim or unsuitable liner is often the cause.
Burnt or overheated liners
Reduce power, increase conveyor speed, review dwell time and make sure the sealing head is not too close to the cap. Also check that the head range suits the cap diameter.
Intermittent results
Look for inconsistent cap torque, uneven bottle spacing, wobbling containers, cap height variation or line speed fluctuations.
Leakage after sealing
Confirm the seal is continuous around the full rim and test after cooling. Incompatible container materials or contaminated mouths can pass visual inspection but fail under pressure or distribution handling.
Persistent seal quality issue?
Lancing UK can help review the machine setup and the pack variables.