Title :
Ultrasonic one-shot seam joining of polytetrafluoroethylene sheets
Author :
Watanabe, Yuji ; Mori, Eiji
Author_Institution :
Fac. of Eng., Takushoku Univ., Tokyo, Japan
Abstract :
In recent studies, we carried out ultrasonic multiple spot joining of polytetrafluoroethylene (PTFE; Teflon) sheets of 0.1-0.8 mm thicknesses using a 320 kHz longitudinal-mode transducer with a joining tool 2.2 mm in diameter, and a 50 kHz flexural-mode transducer with a joining tool 5 mm in diameter. However, the joining spots are very small to apply for a large joining area. Therefore, we attempted to join PTFE sheets using the lateral face of a longitudinally vibrated rod for one-shot seam joining. The lateral face can rub the PTFE face strongly. As the first step, we joined two PTFE sheets of 0.3-0.8 mm thicknesses using a 19 kHz longitudinal-mode joining system having 10 mm×80 mm joining area with a half wave length straight bar. The joining is carried out in a few seconds. The maximum joint strength is 2.4 MPa under the conditions that thickness of the sheet is 0.5 mm, static pressure is 6 MPa and joining time is 10 s
Keywords :
joining processes; polymers; shear strength; tensile strength; ultrasonic transducers; ultrasonic welding; 0.3 to 0.8 mm; 0.5 mm; 10 mm; 10 s; 19 kHz; 80 mm; PTFE sheets; Teflon; half wave length straight bar; joining spots; joining time; large joining area; lateral face; longitudinal-mode joining system; longitudinally vibrated rod; maximum joint strength; one-shot seam joining; polytetrafluoroethylene sheets; static pressure; thickness; ultrasonic one-shot seam joining; Chemicals; Fasteners; Heating; Joining IEEE; Reduced instruction set computing; Sheet materials; Softening; Temperature; Ultrasonic transducers; Vibrations;
Conference_Titel :
Ultrasonics Symposium, 1995. Proceedings., 1995 IEEE
Conference_Location :
Seattle, WA
Print_ISBN :
0-7803-2940-6
DOI :
10.1109/ULTSYM.1995.495745
