Cap Sealing with Induction Heating - Video by Ameritherm
This video from Ameritherm
explains the basics of cap sealing using induction heating. The food and medical
industries require high-speed hermetic sealing between the cap and the container.
A cap- to-container seal is made with the aid of a laminated disc composed
of a wax layer, aluminum layer, and a polyethylene (PE) layer. The aluminum
layer acts as a susceptor, heating to about 125-150°C in the electromagnetic
field produced by the induction coil. It then heats the wax and PE layer sufficiently
to produce a hermetic seal between the cap and container. Heating times are
in the order of 100 milliseconds, supporting a high-speed automated process.
Typical RF power supplies for cap sealing range from 1 to 20 kW, depending
on the parts and application requirements.
Run time: 1.39 mins