When discussing the two styles of sealing heads, flat & tunnel, it is important to remember a few important concepts:
- The strength of the electromagnetic field generated by your induction sealer dissipates exponentially with respect to the distance from the sealing head.
- The distance from the top of your cap to the foil inside the cap is not equal with all closure styles. Compare a flat continuous thread(CT) cap with a child resistant closure(CRC.) The foil in the flat CT cap is very near the top while the foil in the CRC maybe as much as 1/4" from the top of the cap!
- The physical size of the foil inner liner plays a role in determining which style of sealing head works best for your application. While it may seem a little counter-intuitive at first thought, it takes more energy to seal a smaller liner than it does a large one. Because as the liner increases in size, it also increases the amount of metal mass available to be heated.
Every application may vary a bit, but as a general rule containers with caps greater than 53mm in diameter where the foil is near the top of the closure are typically sealed utilizing a flat sealing head. The magnetic field produced by the sealing head is directed into the foil from the head above.
Enercon also offers a special sealing head known as our All-in-One sealing head which allows you to seal a range of closures from 20mm up to 120mm all with the same sealing head!
Enercon systems are designed to operate in a maximum ambient temperature of 40°C (104°F) @ 80% relative humidity, non-condensing.