The wood used for the Sandwichbike’s frame is beech plywood. Harvested in Germany, near a small town called Brakel to be exact. The factory producing the plywood is established right there, so there’s no need to drag trees all across the continent to get the Sandwichbike its frame. The production process of Sandwichbikes wooden frame consists of 3 stages.
1st Stage: Veneer production
After being cut down in the local forest, the short transport route to the factories storage site, the beech trunks are sprayed with water, so that the trunk wood maintains its quality. Before it goes into production, the trunk wood goes into the Becker Brakel steam pits where they are fanned by hot water vapour for 48 hours. Then the wood is soft enough for the peeling machine. After peeling, the wet veneers run through a belt dryer after which they are sorted electronically by quality before they move on to the next production stage.
2nd Stage: Pressing
Before the veneers are brought into shape, 15 layers are glued together with adhesion rollers. The bonded
veneers are brought into shape in a press using high pressure. The adhesive hardens more quickly because the pressing tools are heated.
3nd Stage: Processing
The pressed plates are cut into equally wide shaped wood parts by CNC-controlled saws, making it as accurate as can be. As the finishing touch, the wooden plates of layered plywood are treated with a varnish that is breathable and UV-resistant so that Sandwichbikes is all weather proof.
A new Sandwichbike comes from mature wood, since the beech trees are harvested from the age of about 120 years. The forest they come from has been sustainably managed for more than 200 years, meaning no more wood is harvested than can be regrown again. This gains our plywood a PEFC certification.
But how does it all stick together?
This is where the smart cylinders come in. These carefully milled aluminum parts are what turns four wooden panels and two wheels into a Sandwichbike.