Abstract: Device for the manufacturing a block comprising a locking key and a folded shell that is scored and/or pre-grooved. The device includes a first device that includes at least one shaping device comprising a funnel having corner folding elements and at least a pressing element or a traction element. The at least one shaping device is configured to shape a sheet element into the folded shell so that corner edges of the sheet element are folded inwardly by the corner folding elements and sides of the sheet element assume a vertical position after the pressing or traction element applies a force to a center of the sheet element. A second device is utilized that includes at least a pressing element configured to insert the locking key into said folded shell so as to form said block.

Abstract: Technical device for shaping. Characterized in that said machine shapes shells simply by means of a positive or negative thrust driving into what is referred to as a funnel a precut and pre-scored sheet. The pushing or pulling energy forces the sheet to deform and then to adopt the desired shape. The widening, situated at the top of said funnel, allows the sheet to be positioned and then guided into the restriction opening. The deformations are oriented by fixed supports situated on the path of said funnel. As it gradually passes through the restriction, the shell takes shape with its sides being folded down vertically and its four corners being folded towards its inner centre. Closure with the locking key by guided pressure.