Folding device and method for folding-gluing machine

Abstract

The invention relates to a device for folding cut-outs of paper, cardboard, plastic, corrugated cardboard or similar materials travelling through a folding-gluing machine, said device including a tool (30) for folding a front tab (21') of a cut-out (20') placed above the cut-out transfer surface, wherein the folding tool (30) is alternately mobile between an initial position in which the folding tool (30) is capable of crossing the cut-out transfer surface without interacting with said cut-outs and a final position in which the folding tool (30) is capable of resting against a bottom surface (20b') of said cut-out (20') so as to fold said front tab (21') in the space located above the cut-out transfer surface.

Description

technical field [0001] The invention relates to a folding method and a device for folding blanks of paper, cardboard, plastics, corrugated cardboard or similar material in a folder-gluing machine. [0002] The invention also relates to a folding tool for folding blanks of paper, cardboard, plastic, corrugated cardboard or similar material. [0003] The invention finally relates to a folder-gluing machine, ie a machine for converting blanks into folding boxes. Background technique [0004] To make a so-called crash-lock bottom carton, for example, a blank is used comprising four longitudinal fold lines and one transverse fold line, which define longitudinal panels and a transverse flap. For this type of box, the longitudinal panels and transverse flaps are folded in a folder-gluer. Transverse flaps are flaps that are folded along transverse fold lines. The front flap refers to the downstream transverse flap. Likewise, the downstream transverse edge of the blank is referre...

AI Technical Summary

Problems solved by technology

[0020] While such a folding arrangement limits imprinting on the blank and noise problems caused by impact noise, it is in fact below the plane of passage of the blank while the front flap is folded above the plane of passage of the blank within the space of the folding device, i.e. on the opposite side of the folding device, this restricts the action of the folding tool, so that the folding of the front flap must be done with the folding cross member, which is unsatisfactory

[0021] Furthermore, since they are located below the plane of passage of the blanks, the adjustment of the various elements that make up this folding device (lifting fingers, jacks, jack control system, etc.) It is not satisfactory to operate in the region of

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