Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1991-01-18
1993-03-23
Simmons, David A.
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
156158, 1563041, 1565801, 1565802, 264 23, 4251742, B32B 3116
Patent
active
051960796
ABSTRACT:
A method and apparatus are disclosed for joining a plurality of tubular thermoplastic workpieces by causing the workpieces to be stacked with their internal surfaces axially aligned. High frequency vibrations are applied to the respective inner surfaces of the stacked workpieces, the motion of the vibrations being predominantly along the axial alignment of the workpieces. Responsive to the dissipation of the vibratory energy, thermoplastic material from the inner surfaces of the workpieces becomes molten and flows and, upon the cessation of the vibrations, the molten and flowed material rigidifies to cause the workpieces to be joined. The high frequency vibrations, most suitably, are provided by a horn adapted to be resonant as a half wavelength resonator at an ultrasonic frequency in the range between 16 and 25 kHz.
REFERENCES:
patent: 3758355 (1973-09-01), Witherow
patent: 3790059 (1974-02-01), Jacke et al.
patent: 4070217 (1978-01-01), Smith, II et al.
Branson Ultrasonics Corporation
Sells J.
Simmons David A.
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