Method and apparatus for vibration welding of thermoplastic...

Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor

Reexamination Certificate

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C156S064000, C156S580000

Reexamination Certificate

active

07122088

ABSTRACT:
Vibratory welded connections are formed between first and second members (32, 33) of thermoplastic material by interposing a junction piece (47) of similar material and vibrating the junction piece (47) at high speed while pressing the first second members (32,33) in a controlled manner against opposite sides of the junction piece (47). Friction created by the vibration generates heat which melts a small amount of material at the engaging surfaces which upon cooling provides a strong welded joint having minimal flash. Entire frame systems such as window-frames can be fabricated by an apparatus system (120) which forms a friction welded joint between adjacent ends of the frame members (134, 135, 136, 137). Furthermore the frame can be fabricated around a panel such as a glazing panel. The welded connections formed by the system do not mar the finish of the frame members and produce no unsightly flash bead requiring subsequent machining steps for its removal.

REFERENCES:
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patent: 5902657 (1999-05-01), Hanson et al.
patent: 6604668 (2003-08-01), Crasser
patent: 6673175 (2004-01-01), Brooks
patent: 198 09 956 (1999-09-01), None
patent: 199 38 099 (2001-02-01), None
patent: 1 371 737 (1964-09-01), None
patent: 2 425 608 (1979-12-01), None
patent: 2 033 394 (1980-05-01), None
patent: 01 12420 (2001-02-01), None

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