Method for manufacturing a cushion body with a concave-convex structure and mold for manufacturing cushion body with concave-convex structure

A method for manufacturing a cushion body with a concave-convex structure, comprising at least the following steps:

• pasting a first elastic sheet of closed-cell elastic material on a second elastic sheet of partially open-cell and partially closed-cell elastic material;
• heating the first elastic sheet and the second elastic sheet that are combined;
• sucking, under a negative pressure, the previously combined and heated first elastic sheet and second elastic sheet from one side of the second elastic sheet while the previously combined and heated first and second elastic sheets are extended on a surface of a mold having the concave-convex structure and cooled;
• and
• applying a positive pressure to a surface of the first elastic sheet at the same time to assist the negative pressure in sucking the second elastic sheet, so that the first elastic sheet and the second elastic sheet are deformed while being cooled and shaped, so as to obtain the cushion body with the concave-convex structure and such that the concave-convex structure has a lower raised height corresponding to regions of the second elastic sheet of open-cell material than a raised height corresponding to regions of the second elastic sheet of closed-cell material.