BONDING BY INDUCTIVE HEATING

摘要

A gun assembly for bonding a fastener to a workpiece is disclosed which uses heat induction to fuse a thermoplastic adhesive coating on the base of the fastener to the workpiece. The gun assembly has a head member of electrically non-conducting material. A hollowed core electrical conductor is embedded in the head member in a spiral configuration adjacent the surface of the forward end of the head member. Seating means are provided on the forward end centrally of the spiral configuration for receiving the fastener to be applied to the workpiece. An air conduit extending through the head member between its forward and rearward ends is in communication with the seating means. A flux concentrator plate is mounted on the forward end of the head member and surrounds the seating means. A body member slidingly supports the head member and is selectively moved between a retract position and a workpiece engaging position by a piston and cylinder drive means.