公开(公告)号：SE326894B

公开(公告)日：1970-08-03

申请号：SE391866

申请日：1966-03-24

Applicant: BAYER AG

Inventor： GUGELOT H ,  HOPPE P ,  REICHL E ,  WEINBRENNER E

IPC: B62D29/04

Abstract: 1,147,761. Laminated vehicle frame. PARBENFABRIKEN BAYER A.G. 25 March, 1966 [26 March, 1965], No. 13420/66. Heading B5N. A self-supporting underframe for a vehicle comprises two shells, firmly connected at the edges thereof, the space between the two shells being filled with a hard foam core produced in situ from an expandable reaction mixture, the density of the core exhibiting local variations in a direction perpendicular to the shells and in at least one other direction parallel to the shells. The shells may be of metal, plastics material which may be reinforced with glass fibres), e.g. polyvinyl chloride or plywood and the underframe may be of such shape as to provide a front section, engine and gear-box compartments, wheel compartments, instrument frame compartment, the lower surface of the vehicle compartment, fuel tank compartment, luggage compartment and tail section. The foam core may comprise a phenol-formaldehyde resin, an epoxy resin, polyurethane or polystyrene, the local variations in density being effected by roughening mechanically the inner surfaces of the shells, e.g. by sand-blowing and by subsequently coating them with an adhesive in which three-dimensional glass fibre or synthetic resin fleeces or flocked carrier material, e.g. jute are embedded or on to which fibres are electrostatically flocked. The underframe may be divided into separate compartments, e.g. by bulkheads of foam. Reinforcements, e.g. layers of fibres, torsion bristles, honeycombs, sleeves or gauzes, cables, conduits, pipes and instruments may be incorporated prior to formation of the core. The undersurface is preferably sprayed with an elastomer.