Method and apparatus for ultrasonic plastic forming and joining

Details Method and apparatus for ultrasonic plastic forming and joining Method and apparatus for ultrasonic plastic forming and joining

1984-12-07

1986-12-23

Smith, Jerry

Boots, shoes, and leggings

364473, 364477, 156 731, 156 734, 156350, 156378, 1565801, 156 64, 228 11, 228 9, 264 23, 264 401, 264 405, 4251742, 425 29, G06F 1546

Patent

active

046316850

ABSTRACT:
Accurate dimensional control in ultrasonic welding or upsetting of plastic parts is accomplished by the method and apparatus for monitoring the ultrasonic head displacement and sensing when a predetermined trigger force is applied to the part or parts, turning on the ultrasonic energy at the trigger point and terminating the ultrasonic energy when head displacement from the trigger point reaches an empirically established value, holding the force for a hold time and measuring the maximum displacement value at the end of the hold time, releasing the force when the force returns to the trigger point, measuring the overall displacement, and determining whether the overall displacement is within allowable tolerance values. Weld time and weld energy as well as the overall head displacement are monitored for comparison with preset tolerance values to determine acceptability of the part being processed.

REFERENCES:
patent: 3602257 (1971-08-01), Berleyoung et al.
patent: 3874963 (1975-04-01), Barger
patent: 3925139 (1975-12-01), Simmons
patent: 4047992 (1977-09-01), Williams et al.
patent: 4159220 (1979-06-01), Bosche et al.
patent: 4301343 (1981-11-01), Jonelis
patent: 4410381 (1983-10-01), Chapman, II
patent: 4549269 (1985-10-01), LaPointe et al.

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