Packaging sealing

LSM Fin longitudinal seal modules

The LSM Fin is the logical further development of the longitudinal seal modules from Herrmann. Its compact design means that it can be easily integrated in both horizontal and vertical bag machines.

35 kHz operating frequency
speed of up to 120 m/min
3 force ranges of 12 N - 270 N

Precise and straightforward adjustment options and the electronic force setting allow for reproducible sealing results with consistently high levels of quality – also with a varying production speed.

In the LMS Fin, the longitudinal seal is created on the basis of the continuous guidance of the films past the fixed installation tools. This means that the synchronization of rotating tools with the film feed is not necessary. The ultrasonic ensures minimal frictional forces and enables a consistent film movement. Depending on the requirements, various sealing blades are available for determining the seal design.

The generation of the sealing force is pneumatic and set electronically via a proportional control valve. This enables the rapid adjustment of the force during the process and for constant sealing results to be guaranteed – even with a varying production speed.
The LSM Fin is designed so that all the settings are easy to use and easily accessible. The anvil holder with sealing blade can be easily removed for cleaning – all of the settings are saved for the reassembly.

High process stability with varying process speed
Minimum (construction) space requirement due to compact design
Intuitive and easily accessible setting options
Anvil can be easily removed for rapid cleaning
Rapid adjustment of the process parameters due to electronic settings

application engineering

Application examples

Sweets and snacks
Meats and sausages
Baked goods

Advantages of ultrasonic sealing technology

Tight and strong sealing lines, even with seal contamination
No thermal influence on the product thanks to cold sealing tools
Instant on: no extra time to heat up the sealing tools necessary
No cold sealing mass required

Herrmann Engineering

more details

APPLICATION ENGINEERING

We work with you to develop customized solutions which correspond to your demands precisely. As experts in our field, we develop applications which make your project a success. Here, we rely on long-standing technology partnerships and the results from over 40 high-tech laboratories around the world.

PERFECT PRODUCT

We offer a premium product portfolio with the highest quality standards – Made in Germany. We stand for top weld results, professional integration and durability of all ultrasonic components and modules for an economical overall solution.

GLOBAL SERVICE

We guarantee reliability, safety and a quick on-site service as part of our concept, and immediate support in over 20 countries. For you, this means quick help when you really need it – at any time and in your local language.

SUSTAINABILITY

A simple route to more sustainability: not a problem with our efficient ultrasonic technology! The ability to do without joining materials and the low energy consumption mean that your production process will automatically become more sustainable. Reliable bonding will also reduce your rejects and prevent you from generating unnecessary waste.

NEWS & EVENTS

All about News & Events for packaging sealing

News

Save 75% plastics

Together with the packaging service provider Verdesoft, Herrmann Ultraschall has developed a cup and a tube that can be closed by ultrasonics. The packaging concepts have a comparable product protection as conventional plastic packaging and save up to 75% plastic.

News

Ultrasonic sealing: Enabling Sustainability

Mono-materials and paper composites for packaging are increasingly in demand and the number of inquiries regarding new recyclable materials is increasing at the ultrasonic laboratory of Herrmann Ultraschall. Many of the major food companies have set themselves high sustainability targets and are testing the new materials.

News

Ultrasonic welding of bio-based plastics

As of now there are few inquiries for the welding of recycled materials, ie plastics that already have been processed once or more before. The weldability must be determined empirically in the test laboratory.

News

Circular economy

Ultrasonic technology can also deliver good sealing results with narrow process limits, especially with regard to tightness and visual appearance. The thermal expansion is kept to a minimum. Thermal processes demonstrate disadvantages of excessive heat input, especially in the continuous welding of film webs.

Branch solution

FOOD

For packaging with thermoplastic sealing layers, such as capsules, pouches, drink cartons, cups and trays, ultrasonic sealing provides a large number of options: above all, high cycle rates and tight seals despite potential product residues in the seal area. Ultrasonic technology fulfills all criteria of process optimization and validation crucial to food packaging companies.

Ultrasonic welding basics

Ultrasonic sealing

The crucial difference from conventional sealing using thermal jaws is the type of heat introduction. In thermal sealing, the heat comes from outside. The support layer is also warmed and can also be fused.

PERFECT PRODUCT

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VSM Valve seal modules

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