SANDWICH PANEL MANUFACTURING METHOD (VERSIONS) Russian patent published in 2014 - IPC E04C2/00 E04B1/80 B60R13/08 

FIELD: automobile production.

SUBSTANCE: manufacturing method of sandwich panels containing at least one layer of a warmth-keeping material, mainly foamed plastic and a reinforcing layer from glass fabric involves connection of the reinforcing layer and foamed plastic by means of a glued connection. Besides, there additionally used is at least one matrix form, the working surface of which is pre-treated with a releasing agent for resins; then, the working surface is filled with resin, mainly epoxy resin, with a layer of preferably 0.5-1.5 mm and left till it is dried; after that, an additional reinforcing layer in the form of a glass fibre matt layer and a reinforcing layer in the form of a glass fabric layer are laid in turns onto the resin layer; after that, the glass fibre matt and glass fabric layers are soaked with a self-expanding polyurethane adhesive with microspheres and the warmth-keeping material is laid onto the glass fabric layer; then, the layers being attached are pressed and dried, and mainly under pressure by means of a vacuum table; after complete drying of the layer the matrix form is removed.

EFFECT: improving heat-insulation and strength characteristics.

6 cl, 1 dwg