Sealing
With induction heating

Illustration sealing packing

For sealing processes, induction heating offers great benefits when compared to non-electrical methods. Because when containers and packaging of foodstuffs, for example, are sealed, it is always a question of maintaining the quality of the packaged products.

With inductive sealing, the energy is only ever introduced into the conductive layer, e.g. of aluminium, and the required process heat is generated there. This means that potentially disturbing thermal effects in the product to be packaged are avoided. At the same time, the energy is very well dosed, which means that even after the actual sealing process, no excess residual heat can have a negative effect on the product.

Where is sealing used?

Induction tube welding

Induction sealing is used for tubes in the food, medical and cosmetics industries. Himmelwerk induction systems require little space and can therefore be easily integrated into existing production processes. The ease with which induction heating processes can be automated promotes the fastest possible processes.

Inductive welding of cardboard boxes

Induction heating for sealing cardboard boxes is suitable for all industries. The precise temperature control not only means that the quality of the packaged products remains assured, but also that a lot of energy is saved.
Resources are also conserved, however, because the induction heating process can still be checked during the sealing process, which means that scrap can be reduced to almost zero.

Induction sealing of bottles, jars and canisters

Fast heating times, precise heating and easy reproducibility of the inductive processes ensure that processes can be designed efficiently when sealing bottles, jars and canisters.
At the same time, induction heating also ensures good working conditions: a pleasant working climate, safe processes and easy, intuitive operation.

Our process

Sealing with induction heating – we advise you

We show you how to implement the fastest cycle times, integrate induction heating automatically and support you during commissioning.

The whole process to the solution
Zwei Mitarbeiter vor Anlage
Zwei Mitarbeiter an Whiteboard

Our service

Focus on growth

Induction heating has many benefits for your company, your employees and the environment. Use them and set an example in your industry.

We accompany you

Systems from Himmelwerk

Induction converters
Inductors
Measuring & monitoring technology
Other induction heating technology

Or get involved
a little deeper:

Layout of induction systems
Glossary of technical terms
Himmelwerk Laboratory
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Get in touch with your personal contact - our engineers are looking forward to hearing from you

Daniel Schulte

Head of International Sales

Applications overview
Surface treatment

Since 1950, Himmelwerk has shipped more than 19,000 high and medium frequency converters worldwide.
By how much can you reduce your CO₂ emissions per year? Let’s have a look.

Assumption 1: 25% of your converters are still operational.

Assumption 2: They have an average output of 6 kW and thus a power consumption of 7 kW.

Assumption 3: These generators are operational 8 hrs per day and 5 days per week.

Assumption 4: Inductive heating uses up to 40% less energy than conventional methods. Let’s assume 30%.

With these assumptions, our calculation would look like this: Daily energy consumption: 8 hrs x 7 kW = 56 kW

Energy savings per day: 56 kWh / 0.7 = 80 kWh; 80 – 56 = 24 kWh

Total energy savings per day: 24 kWh x 4,750 converters = 114,000 kWh

Total energy savings per year: 220 working days x 114,000 kWh = 25,080,000 kWh

Conversion factor kWh/CO₂: 1 kWh is equivalent to approx. 0.485 kg of CO₂ (source: German Federal Environmental Agency, Climate Change 15/2022)

CO₂ reduction per year: 25,080,000 kWh x 0.485 kg = 12,163,800 kg