Heat sealing involves applying localized induction heating to an aluminum lid placed on the neck of a container, which raises the temperature of the sealing product's layer in contact with the neck covered by the lid.
Induction heating now offers the best solution for sealing foil lids on to containers, any type of jar, on any section (circular, oval, rectangular), and for a wide range of materials like glass and plastic.
The heat is directed to the lid itself as close as possible to the sealing area. This simplifies how the process is done and eliminates problems due to the overheating of sealing heads, commonly found in pressure sealing processes, as well as problems caused by uneven neck surfaces.
For heat-sealed packaging, the precision of induction heating guarantees:
• Optimum hygiene (the lid does not come in contact with the inductor during the heating process)
• Longer product shelf-life
• Tamper-proof seals
• Intact packaging, cover and contents
These benefits make induction heat sealing the preferred process in the food, pharmaceutical and cosmetics industries, which must meet strict standards in product hygiene and safety.
The medium-frequency generator is made of transistors and does not contain any wearing parts. It can be adjusted for a variety of processes:
• Sealing through corking
• Line sealing before encapsulation
• Static sealing before encapsulation.
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