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troubleshooting common

How do I know if I have a proper seal?
Due to the wide variety of sealing materials available, particular adhesion properties will have to be determined by the customer. Generally, proper sealing can usually be determined by the following questions:
•  Cool Down - Was the seal completely cool before removing the cap? (You’ll want to give it at least a few minutes to cool, foil manufacturers recommend 24 hours to fully let it set.)
•  Over Heating - Are there any signs of scorching or melting on the inside of the cap?
•  Did the Styrofoam backing melt (single piece liners only)? Do the pull tabs release easily?
•  Under Heating - Did the foil melt the top of the bottle?
•  Does the wax release from the cap properly (no swirl marks or cloudy residue in the center of the foil)?
•  Proper Heating - Did the foil completely seal around the lip?
•  Are the requirements of a proper seal met?
•  Will the seal stand the force of being dropped with the cap off? (non-breakable containers only)
•  Does the seal leak after being dropped? (Many times the foil will break before the seal does.)
•  If used for easy-peal (not tamper evident), can it be removed without leaving a foil ring?

sealing problems


Troubleshooting Guide

Burned cardboard liner
1. Excessive power from sealer: conveyor set too slow, power set to high.
2. Bottle backup under sealing head.
3. Insufficient cap application torque

Cap extremely difficult to remove (2-piece liner)
1. Insufficient power from sealer:conveyor set too fast, power set too low (insufficient wax melt).
2. Improper coil height, coil too high.
3. Excessive cap application torque.
4. Foam liner polymer welds to polymer in induction liner.

If the power output is steady and one container seals, all should seal. The fault is not with the induction sealer. Check to make sure the caps are all being torqued evenly and are not cocked. Also check the bottle seating areas for uneven surfaces, burrs, etc.

Insufficient sealing power
Metal guide rails located too close to sealing head. Guide rails under sealing head should not be metal because they can distort the electromagnetic field.

Low or no removal torque

1. Insufficient cap application torque: closure not securely applied.
2. Excessive application torque: threads of closure stripped.

Partial, weak, or no seal

1. Insufficient power from sealer: conveyor set too fast, power set too low.
2. Improper coil height.
3. Insufficient torque on cap.
4. Induction liner incompatible with bottle material.
5. Bottle neck finish has been flame or chemically treated.
6. Imperfections in container finish, land area.

Pin holing
Excessive power from sealer: conveyor set too slow, power set too high.

Pinwheel effect on liner
Retorquing too soon after induction sealing.

Seal extremely difficult to remove (1-piece liner)
1.Excessive power from sealer.
2.Liner larger than neck, creates overhang.

Cap Inspection Systems
Flashing Light
Mobile Cart
Motion-Foil Detection
Quick-Set Adjustable
Remote Control
Variable Sealing Control
All-in-One Head
Flat Sealing Heads
Tunnel Sealing Head
involving Floratine Products
Tropicana’s Clear PET
Bryson Industries, Inc.,
BBQ sauce/salad
AccuDial spins children
Sam’s Club
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