Method for manufacturing a structure with cellular cores for a turbojet nacelle

A method for manufacturing a structure with cellular cores that can be used in a structural panel of a turbojet nacelle, including at least one block of cellular cores having;

• a central portion with core honeycomb cells;
• and
• at least two side portions each including side honeycomb cells, said side honeycomb cells comprising:
• edge honeycomb cells situated on edges of a side part of a block intended to be joined;
• and
• adjacent honeycomb cells adjacent to the edge honeycomb cells,
• wherein said method comprises:
• A) forming junction walls on the side honeycomb cells by opening the edge honeycomb cells, the junction walls being capable of interacting for forming a junction area;
• B) unfolding the junction walls thus formed in step A;
• and
• C) joining the junction walls thus unfolded in step B and belonging to two different side portions end-to-end so that said junction walls are fitted together so as to form a junction area.