PURPOSE: To shape a rubber shoes bottom consisting of multilayers by the simple method by introducing the not-yet-vulcanized rubber having different quality to a grounded bottom into an upper bottom shaping cavity formed in the upper part of the grounded bottom through injection and heating said rubber and baking-vulcanizing the upper bottom onto the upper layer of the grounded bottom and vulcanizing the upper layer of the grounded bottom.
CONSTITUTION: A grounded bottom 1 is held by the stick onto the holding needles installed on the bottom surface of a mold 4, or fitted into a dividing chamber 40 which is formed by arranging ribs 41 on the periphery on the bottom surface of the mold 4, and the not-yet-vulcanized rubber is injection-molded into an upper bottom molding cavity 0 formed in the upper part of the grounded bottom 1, and baking vulcanization of the upper bottom 2 onto the upper layer 11 of the grounded bottom is carried out. If an upper cover of the upper bottom molding cavity 0 is molded by a last 5 having an instep cover 3 suspended, the grounded bottom 1 and the instep cover 3 can be joined integrally through the upper bottom 2 in the molding of the upper bottom 2. Therefore, the bulging-out of the upper bottom molding material to the grounded surface of the grounded bottom 1 is prevented, and a multiplayered bottom having the superior outside appearance can be obtained.
MORONAGA YOSHIHARU
ARAMAKI MAKOTO
