Metal working – Method of mechanical manufacture – Assembling or joining
Patent
1986-12-17
1988-08-16
Moon, Charlie T.
Metal working
Method of mechanical manufacture
Assembling or joining
295221, 49460, 52716, 264249, 428 31, B21D 3900, B23P 1100
Patent
active
047633972
ABSTRACT:
A method and apparatus for bonding two articles and in particular a metal trim strip to a thermoplastic article such as is used for automotive decorative window trim. The thermoplastic article includes a raised ridge portion which serves to provide means for accurately aligning the metal trim strip on the thermoplastic article. A plurality of holes are formed through the ridge portion at spaced locations along its length. The metal trim strip is preferably "C-shaped" in cross-section so as to define a channel having a restricted opening for receiving the raised ridge portion of the thermoplastic article. A controlled flow of hot air is directed into the holes of the thermoplastic article to plasticize a controlled portion of the thermoplastic material surrounding the holes. A stake is then projected into the plasticized material to displace the plasticized material into the channel portions of the metal strip. Upon return of the displaced thermoplastic material to a rigid state, the two articles are firmly and accurately bonded together. The resulting trim piece has a flush rear surface which facilitates proper installation of the trim piece on the vehicle body.
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patent: 3591996 (1971-07-01), Shanok
Abitz Roger E.
Tsukayama Robert H.
Douglas & Lomason Company
Moon Charlie T.
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