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Brands Register products

Hydroforming press for serial production of Bipolar Plates

We have developed our patented Graebener hydroforming press especially for the economic production of metallic bipolar plates for fuel cells and electrolyzers and have made it ready for series production

With our sandwich tool, several plates can effortlessly be produced simultaneously per stroke, e.g. the cathode and anode side

As a pioneer in hydroforming, we deliberately rely on the process for which we are known worldwide as experts for the production of bipolar plates

Hydroforming

Hydroforming or external high-pressure forming is an active media forming process

A metal foil is inserted into a tool gravure and expanded into the forming tool with very high pressure by means of a water-oil-emulsion

Thanks to the even pressure distribution over the entire foil surface, an homogeneous material thickness distribution is achieved, and abrupt stress transitions are avoided

This allows forming even the smallest radii. The material spring back remains low

Benefits

External high-pressure forming

Extremely filigree structures can be realized in series using extremely thin materials from 50 μm

In contrast to mechanical forming, which at first glance may seem more cost-effective, especially for series production, hydroforming offers numerous advantages that pay off in the long term

Since bipolar plate production is all about repeatable precision, attention to detail and high value, we believe that hydroforming is the optimal process and one of the quality features that makes Graebener Bipolar Plate Technologies your sustainable competitive edge.

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