Patent ID: 11871815

Abstract:
The invention relates to a method for producing a shoe with an air pump device bellows which is arranged in the heel region, wherein an upper (2), a midsole (3), and an outsole (4) are first provided. The lower face (32) of the midsole (3) has a recess (36) for forming a cavity for the bellows and a surface which surrounds the recess on all sides and which comprises a surface profile, and the upper face (41) of the outsole (4) has a surface with a surface profile which complements the surface profile of the lower face of the midsole. The horizontal extension of the upper face (41) of the outsole (4) and of a sole section (22) of the upper (2) is greater than the horizontal extension of the midsole (3) such that the outsole (4) and the upper (2) protrude beyond the centered midsole (3) on all sides. In order to connect the upper (2), the midsole (3), and the outsole (4), the midsole (3) is first adhered onto the sole section (22) in a centered manner, and the upper (2) together with the midsole (3) are pressed onto the outsole (4) which is provided in the base element (6) of an injection mold. In the process, the complementary surfaces are adhered such that the cavity of the recess (36) is completely enclosed. The upper (2), the midsole (3), and the outsole (4) are then enclosed by an injection mold, and the outsole (4) upper face (41) surface regions which are not covered by the midsole (3), the outer surfaces of the midsole (3), and the lower face and adjacent lateral surface regions of the upper (2) are overmolded with an edge sole region plastic.