Nifco Inc.

Teruji Shibayama

Yoshio Kaneko

Kunio Hara

Toshie Tanaka

Minoru Morisaki

A rotary welding member made of synthetic resin material comprising a post portion, and a disk-shaped flange portion integrally mounted on one end of the post portion and having a plurality of through holes in the direction of wall thickness thereof for the dissipation of an excessive portion of frictional heat generated during a rotary welding process whereby deleterious or degrading effects upon a base plate, to which the rotary welding member is welded, are effectively prevented.

Rotary welding member made of resin

A rotary welding member made of resin comprising a post portion, and a disk-shaped flange portion integrally mounted on one end of the post portion and having a plurality of ribs formed thereon in the radial direction.

A rotary welding member made of synthetic resin material comprising a post portion, and a disk-shaped flange portion integrally mounted on one end of the post portion and having at least one groove in the mounting surface thereof for permitting air to flow therethrough with respect to an exterior periphery surface portion of the flange portion whereby excess frictional heat generated during the rotary welding process is effectively dissipated.

Fixation of a stud on a workpiece is accomplished by depositing hotmelt adhesive agent on a fitting base of the stud, fastening the stud to a rotary tool, rotating the stud with the fitting base pressed against the workpiece and, after the adhesive agent has been activated to a prescribed extent by the heat of friction, stopping the rotation of the stud and pressing the fitting base against the workpiece.

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Yokohama, Japan

Teruji Shibayama