Manufacturing method of an orthotic and orthotic made by such a method

摘要

A heated and softened plastic skin or plate(4) is pressed(3) at the edge of the insert sole using a compression-injection tool and the plastic is forced partly into the tool cavity. A supporting part(5) is then injection molded in the remaining space in the tool and together with the plastic skin or plate forms a composite shoe insert(2). A heated and softened plastic skin or plate(4) is pressed(3) at the edge of the insert sole using a compression-injection tool and the plastic is forced partly into the tool cavity. A supporting part(5) is then injection molded in the remaining space in the tool and together with the plastic skin or plate forms a composite shoe insert(2). The injected material of the supporting part is harder than the plastic skin or plate material. Softening of the plastic is by use of a radiant heater, an oven and/or a heating plate. or the injection molding tool. A raised edge around the cavity of the compression-injection tool compresses the plastic skin or plate(4). is surrounded by raised edge. The edge outside the shoe insert remains uncompressed(9). During compression the shoe insert(2) is pressed in an edge area from 1-4mm, preferably 2-3mm down to a thickness of almost zero. Additional upper and/or lower material may be added to the shoe insert using heat activated adhesive. Injection of the supporting part may be effected via a film runner at the edge of the shoe sole close to the arch in the longitudinal direction. An independent claim is included for an orthopaedic shoe insert comprising a plastic skin or flexible plastic plate which is thinned around the outer periphery to a thickness of almost zero. A central area forming a supporting part(5) is produced by injection of a harder thermoplastic plastic onto the softer skin or plate.