Insertion block for the formation of a field of hooks in an injection molded object and molded object comprising a field of hooks of this type

摘要

Molded object of thermoplastic material comprising a field of hooks of any shape that has an outer surface that forms a base plane from which at least one hook (10) of a piece with the molded object protrudes, the molded object having formed and the at least one hook (10) by injection molding, the at least one hook (10) comprising a base part (14) and a head or hitch part (15) protruding from the base part (14) , and being delimited by first (10) and second (12) side surfaces each extending along the outer surface of the molded object being separated from each other by an intermediate surface (13) that forms the edge of the at least one hook (10), characterized in that the curved sections (20, 21), defined by the intersections of the first and / or second lateral surfaces (11, 12) with the planes that are parallel to the base plane (Po) and which are at given distances from that plane of base (Po), they have respective curvatures that vary depending on the distance h, the curvature (22, 23) of the curve section being for h = 0, confusing the base plane and said parallel plane, superior to the curvature of at less a section (24, 25) of curve for a distance h corresponding substantially to a level of the head (15) of the at least one hook (10).