LIGNA 2021, 10 - 14 May
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Exhibits of Cooperation Project

Logo Fraunhofer-Institut WKI


Fraunhofer-Institut WKI

Exhibitor details
Exhibitor details
Logo Exhibits of Cooperation Project

Product description

The consistent utilization of sustainably produced, CO2-storing materials in a lightweight structure designed for automated production is exemplified by the exhibited rib cross-section from a racy 22m sailing catamaran (with a scale of 1:2). The light and stiff sandwich structure reduces the material input and thereby the mass of the components. Industrially manufactured plywood and the prefabrication of modules in CNC processing machines enable a high degree of automation. Veneer wood, flax fibers, cork and epoxy resin made from vegetable oils are hereby used. Solely the hardener for the resin, as well as individual auxiliary materials for the production, are thereby petroleum products.

The utilization of particularly lightweight materials will be demonstrated by means of the exhibit of a hull cross-section from a small pedal-boat with pedelec drive. Compared to the 22m sailing catamaran, the stress on the hull structure is considerably lower. Correspondingly higher is the demand for particularly light materials and low wall thicknesses in the structure. For this reason, two thin veneer layers, offset by 90° and with a total thickness of 1.6 mm and a foam made from recycled PET bottles as the sandwich core, are used for the outer surface layer instead of an industrially produced plywood. The inner layer consists of a layer of flax-fiber laminate.

The substitution of aluminum by renewable raw materials is illustrated through the example of a delivery bicycle. The rear section of a pedelec delivery bicycle with rear wheel mount, bottom bracket bearing, seat tube, steering tube bearing and mounting flange for the cargo area with front wheel. Similar to the 22m sailing catamaran, sustainably produced CO2-storing materials are used for the supporting structure of the bicycle. Unlike most other bicycle frames made from renewable raw materials, industrially produced plywood and the prefabrication of modules in CNC processing machines enable a high degree of automation.

Hall 26, Stand B77

Hybrid materials in moving form

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