Patent ID: 8092863

Claim:
A method for manufacturing lightweight building boards, comprising the steps of: providing a workpiece which comprises two thin-walled cover layers and at least one core layer which is disposed between the cover layers and is made of a light filling material, the at least one core layer possessing cavities and having a lower average density than the cover layers, forming in the workpiece at least one groove which extends through at least one first cover layer and at least partly through the at least one core layer and circumscribes at least a portion of a contour of the lightweight building board to be manufactured, the at least one groove exposing first and second opposing edges of the workpiece, introducing a hardenable mass into the at least one groove, at least partly hardening the hardenable mass, and making a separating cut along the at least one groove, so the at least partly hardened mass is separated in the longitudinal direction of the groove, such that the hardenable mass covers the first and second opposing edges after separation.