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Heat Sealing VS Induction Sealing

What are the distinctions between a heat sealing machine and an induction sealing machine?

This paper looks at the significant difference in the case of an automated line.

Oftentimes, there are customers who are planning to seal their goods asking advice about heat sealing equipment.  The majority of these clients are better served using induction seal machinery on the subject of machine versatility, pricing, safety and set up. Below are a few crucial distinctions in the sealing machinery and process:

The cons of heat sealing machinery:

  1. Goods are being sealed with no cap or lid in place.
  2. For sealing machines using cups or turrets in open containers, product handling in open containers without spillage becomes difficult when the whole process is moved to automation
  3. The machines are limited to specific container sizes because of the amount of difficulty in transporting open containers.
  4. The freedom of using the same heat sealing machine to seal a different size and shape container is restricted and demands several change parts.
  5. There is a physical source of heat which comes into contact with the container to melt the seal in place.
  6. The machinery is usually rotary in nature increasing the size and cost of equipment versus the induction sealing machinery.The job cannot be started immediately as the physical sealing heat required needs the sealing elements to arrive at temperature.
  7. Physical handling of the product means the machine has many more service and set up issues in comparison to the induction sealing process where there is no physical contact.
  8. A more substantial sealing work surface is needed when heat sealing; as an example, a Yoghurt tub is fashioned with a turned out flat rim to accept heat sealing foil.

Heat sealing machine benefits:

  1. The sealing material per unit is frequently less than induction sealing material.
  2. Capless sealing is the procedure of heat sealing. Items can be capped or not. This can certainly be done with induction sealing, then again, the machines are uncommon and high-priced.
  3. Easy visual examination of each seal as there is no cap or lid is covering them during the process.
  4. Another huge savings comes with the capacity to use inexpensive plastic seal, with no metal foil layer for sealing jobs that do not need a moisture and oxygen barrier.
  5. Larger diameter jobs beyond 70 mm will make use of a large amount of sealing material per item and hence the supply of lower cost sealing films turns into a higher advantage for heat sealing.
To list out the induction machine advantages and disadvantages would be to simply reverse the aforementioned factors. Nonetheless the primary advantages of induction sealing may be summarised below:
  • Induction machines contain a smaller machine foot print
  • Induction machines are cheaper
  • Induction machines do not literally touch the product
  • Induction machines are less hazardous and more handy as they do not have a physical source of heat
  • Induction machines are versatile and can handle a variety of shapes and sizes of containers.
  • Induction machines can readily start with the production – no heating required.
  • Induction machines tend to be quicker to adjust and set up for different jobs
  • Induction machines are much easier to move from one production line to another because they can simply be wheeled into position over a current area of the conveyor.

There are companies that are dedicated to converting old heat sealing machines over to induction sealing machines, whereas the opposite case does not exist pointing to the generally accepted opinion that whenever you need to seal a jar or bottle essentially the most likely method will be with an induction seal.

There is still a place for heat sealing usually limited to applications when the sealing diameter is more than 70mm and the volumes of the same size product are quite large and changeover of sizes and shapes is not needed. The other main application for heat sealing will be where the product is without lid or cover and the sealing film is what is relied upon to perform the package.

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