Simultaneous amplitude and force profiling during ultrasonic wel

Details Simultaneous amplitude and force profiling during ultrasonic wel Simultaneous amplitude and force profiling during ultrasonic wel

1997-04-29

1999-01-05

Sells, James

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156 731, 156358, 156359, 1565801, B32B 3100

Patent

active

058557067

ABSTRACT:
An ultrasonic processing method is disclosed wherein during the processing time interval the motional amplitude and engaging force of the resonating horn and thereby the power and engaging pressure to the workpiece is varied to improve weld strength and decrease weld cycle time. The variation in motional amplitude and engaging force may be in response to a process condition such as a change in dimensions of the workpiece, a sharp rise in the transducer power curve, or in response to the lapse of a predetermined time interval.

REFERENCES:
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patent: 5487802 (1996-01-01), Mizuta et al.
patent: 5658408 (1997-08-01), Frantz et al.
patent: 5772814 (1998-06-01), Grewell
Kunstoffe 76 (1986) pp. 891-896, article by W. Ochs, et al. entitled "Mikrocomputergesteuerte Ultraschallschweissmaschine" (1986)--no translation.
Kunstoffe 83 (1993) pp. 667-670 entitled "Bessere Nahtqualitat beim Ultraschallschweissen" (1993) with translation.
Antech--94, paper entitled "Amplitude Control in Ultrasonic Welding of Thermoplastics" by David A. Grewell and Jeffrey L. Frantz, (1994).

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