Phillips Plastics Corporation

Gregory O Beglinger

Richard J Schwind

Edward P Massof

The molding apparatus of this invention produces a one-piece molded unit that provides a two-piece plastic fastener whereof one piece is a grommet having a head with a flat front surface and forwardly projecting legs defining a sidewardly and forwardly opening slot, and the other piece is a pin receivable through the head and forwardly slidable in the slot to an operative position holding the front ends of the legs flexingly diverged. As molded, a front end portion of the pin is connected with the head by a frangible flashing. A forwardly opening radially extending groove in the front of the head, opening from one side of the slot, defines a substantially flat forwardly facing groove surface that is rearwardly offset from and parallel to the front surface of the head and is flush with the front end surface of the pin. The molding apparatus comprises two die members, each having a flat surface to which opens a cavity defining one longitudinally extending half of the unit that includes a half of each leg. An elongated core element, lengthwise movable in mold-opening and mold-closing directions, defines the groove, the front end surface of the pin, and the rear portion of the slot.

Apparatus for molding two-piece plastic fastener

In a two-piece plastic fastener, initially molded as a unit, one piece is a grommet having a head with a flat front surface and forwardly projecting legs defining a sidewardly and forwardly opening slot; the other piece is a pin receivable through the head and forwardly slidable in the slot to an operative position holding the front ends of the legs flexingly diverged. As molded, a front end portion of the pin is connected with the head by a frangible flashing. A forwardly opening radially extending groove in the front of the head, opening from one side of the slot, defines a substantially flat forwardly facing groove surface that is rearwardly offset from and parallel to the front surface of the head and is flush with the front end surface of the pin. Cooperating ridges on the grommet legs and the pin confine the latter to lengthwise motion between the legs. In the molding apparatus, an elongated core element, lengthwise movable in mold-opening and mold-closing directions, defines the groove, the front end surface on the pin, and the rear portion of the slot.

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Woodstock, IL, United States of America

Gregory O Beglinger