Method for forming an opened die-cut element, particularly for forming a wrap-around box of the tray plus lid type, and a cartoning machine

A method for forming a die-cut element, comprising:

• providing a main die-cut element and a secondary die-cut element,
• dividing the main die-cut element along a predefined division line in such a way as to obtain a first die-cut element and second die-cut element that are mutually distinct, wherein grip and contrast means retain the main die-cut element during division thereof into the first die-cut element and into the second die-cut element,
• depositing glue on a first portion of one from between the first die-cut element and the secondary die-cut element and on a second portion of one from between the second die-cut element and the secondary die-cut element,
• forming an opened die-cut element of the tray plus lid type provided by the combination of said first die-cut element and of said second die-cut element, wherein:
• the first die-cut element and the second die-cut element are coupled to the secondary die-cut element with the first die-cut element and the secondary die-cut element partly superposed and pressed to one another at the first portion and the second die-cut element and the secondary die-cut element partially superposed and pressed to one another at the second portion;
• wherein the depositing of the glue is carried out prior to the forming of the opened die-cut element.