Hennig UKDesign

High-frequency welded – remains tight for a long time

The optimum design for bellows is the high-frequency welded version. Thanks to this process developed and patented by Hennig, the cover material and guide frames made from PVC are permanently joined. The homogeneous connection of the bellows material and the guide frames ensures maximum loading capacity and absolute tightness against liquids such as cooling or grinding agents.

For special requirements, e.g. resistance to temperatures of up to 400 °C, stitched bellows can be used. High-frequency welded bellows can be manufactured in widths of up to 3 metres.

Robust with a seam – a sound matter

We make bellows with round, oval or rectangular (with rounded off corners) cross-sections using a special sewing method. Bordering bands, ring fasteners or support rings will be used to meet, special requirements and applications.

Due to their robust design, these bellows have a reliable long service life, even under extreme mechanical and dynamic strain. The temperature resistance of these bellows can be increased to approx. 400 °C when using an aluminized glass fibre fabric.

Neatly glued – can be adapted to any shape

These bellows consist of up to three foils glued together in sandwich construction. Special shapes such as polygonal bellows, bellows with negative folding in the opposite direction, or bellows with small fold widths, can be easily constructed.

Due to the special gluing of materials, these bellows provide maximum protection, even against liquids.

Movable steel lamellas – if space is reduced

Do you need vertically mounted bellows? Without lamella overhang? In such a case our bellows with movable lamellas are the perfect solution for you. Each lamella is flexibly fixed to the guide frame. Therefore, the lamellas can lie down flat on the machine enclosure at the bottom.

The perfect combination – to give perfect protection

These folded bellows featuring lamellas on three sides combine the advantages of telescopic steel covers and folded bellows. They are based on high-frequency welded bellows. Additionally, we have added a lamella in the shape of a telescopic element in each fold.

Due to this combination of folded bellows and telescopic steel cover, these bellows are also protected on either side, especially against red hot, sharp-edged swarf or mechanical strain. Thanks to an ideal ratio between the extended and the compressed length and extremely compact dimensions – the lamella overhang equals zero – this type of bellows is perfectly suitable when space is limited.