Method and device for shaping and locking shells

A device for manufacturing a block comprising a locking key and a folded shell that is scored and/or pre-grooved, said device comprising:

• a first device that includes:
• at least one shaping device comprising a funnel having side folding elements and corner folding elements that protrude inwardly and that are located at corners of the funnel;
• said corner folding elements including diagonally located corner folding elements that face toward each other;
• and
• at least a pressing element or a traction element being configured to apply a pressing or traction force to a center of a sheet element;
• said at least one shaping device having an open bottom, the pressing element or the traction element passing into said at least one shaping device and through the open bottom;
• said side and corner folding elements of the funnel of the at least one shaping device being configured, in response to said pressing or traction force, to shape the sheet element into the folded shell with corner edges of the sheet element protruding inwardly by the corner folding elements of the funnel and with the sides of the sheet element extending vertically;
• said funnel being configured to gradually shape the folded shell into a cubic shape as the folded shell descends and diagonally arranged corner edges of the folded shell face toward each other and are angled away from adjacent sides of the folded shell;
• and
• a second device that includes at least a pressing element configured to insert the locking key into said folded shell to form said block.