by Gräbener Maschinentechnik GmbH & Co. KG

Hydroforming Press for Serial Production of Bipolar Plates

  • Advantages of hydroforming: repeatable precision, attention to detail and high value
  • Plate size: up to 2,500 cm2
  • Foil thicknesses: from 50 μm
  • Materials: Stainless steel, titanium, copper, clad materials; also pre-coated (e.g. Sandvik Sanergy®)
  • Sandwich tool: simultaneous production of several plates per stroke

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 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

Features

  • Plate size: up to 2,500 cm2
  • Foil thicknesses: from 50 μm
  • Materials: stainless steel, titanium, copper, clad materials; also pre-coated (e.g. Sandvik Sanergy)
  • Sandwich tool: simultaneous production of several plates per stroke

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.

Application areas

  • Engineering of producibility from CAD designs
  • Production of metal bipolar plates for fuel cell application
  • Production of metal separator plates for electrolysis application
  • Production of metal bipolar plates for heat exchanger application

Contact us

  • Let us help you out in getting the most efficient hydroforming press for Bipolar Plates production

Hydroforming Press For Serial Production of Bipolar Plates

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    Gräbener Maschinentechnik GmbH & Co. KG

    Graebener® Bipolar Plate Technologies (BPT) is part of Graebener® Maschinentechnik, a machine building company with locations in Germany, USA and China. Graebener® BPT has dedicated itself to setting the quality standard for bipolar plate manufacturing technologies. To achieve this, for almost 20 years the company develops innovative processes that help to manufacture components for hydrogen-based energy generation that are tailor-made, integrable, scalable and thus economically efficient. Graebener® BPT accompanies all strategically important steps towards the optimally designed production plant: Starting from engineering with a view to plate design and plant technology via prototyping and pre-buy service in the in-house application lab up to the customized production plant or line.

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