Ultrasonic welding of plastic members

Details Ultrasonic welding of plastic members Ultrasonic welding of plastic members

1977-09-28

1979-03-13

Drummond, Douglas J.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

B29C 2708

Patent

active

041441095

ABSTRACT:
A microwave oven thermometer unit has polysulfone plate with a glass tube secured to the plate by a pair of mounting polysulfone straps. A method of welding the straps to the plate includes forming each of the strap ends with a stud member having a diameter larger than an opening in the plate. The studs and openings are aligned and ultrasonic energy applied, simultaneously with pressure to force the studs into the openings to form a weld. The different sizes of the stud and opening creates weld flash moving in front of the first member and also outwardly of the opening, which has an encircling recess to receive the weld flash.
The stud member is formed with an enlarged head overlying an encircling recess and weld flash deposited therein.

REFERENCES:
patent: 3775189 (1973-11-01), Jaggard
patent: 3966520 (1976-06-01), Fallenbeck et al.
patent: 4003665 (1977-01-01), Dreyer et al.
Information Sheet PW-5, Ultrasonic Stud Welding, Branson Sonic Power Co., Dunbury, Conn., 1/73.

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