Cap Sealing Application Tips
Mar 13th, 2009 | By Mark Plantier | Category: Operating TipsAre your packages trying to tell you something?
When you visit a doctor you’ll provide him with a list of your symptoms. This helps him/her define your ailment and prescribe a remedy. The same can be said for your packages when there are problems on the packaging line.
The chart below identifies symptoms you might see when perfecting your cap sealing operation. Each symptom can be traced back to a cause and remedy.
|
Symptom |
|
|
partial, weak or no seal |
– insufficient power from sealer; conveyor too fast; or power set too low – improper coil height – insufficient application torque – induction liner incompatible with the bottle material bottle neck finish has been flame or chemically treated – imperfections in container finish, land area – product touching liner, heat-sink effect |
|
difficult-to-remove seal |
– sealer power set too high conveyor speed set too slow |
|
difficult-to-remove cap |
– insufficient wax melt, conveyor speed too fast or output power set too low – improper coil height (too high) – excessive application torque – foam-liner material welds to polymer in induction liner – product touching liner, heat-sink effect |
|
burnt cardboard liner |
– excessive sealer power, conveyor too slow or power set too high – bottles back up under sealing head insufficient application torque – gap between liner and container lip caused by defect in container |
|
low removal torque |
– insufficient application torque, closure not securely applied – excessive application torque, threads of closure stripped – void created when wax is absorbed into pulpboard |
|
pinholing |
– excessive power from sealer, conveyor too slow or power set too high – product may be attacking liner, if pinholes occur well after a good seal has been confirmed |
|
liner pinwheel effect |
– retorquing too soon after induction sealer – wax not absorbed into pulpboard completely |