Method of ultrasonic splicing tire tread strip edges

Details Method of ultrasonic splicing tire tread strip edges Method of ultrasonic splicing tire tread strip edges

B - Operations, Transporting

29

D

154/60

B29D 30/18 (2006.01) B29C 65/00 (2006.01) B29C 65/08 (2006.01) B29D 30/52 (2006.01)

Patent

CA 1306173

ABSTRACT OF THE DISCLOSURE A method for splicing beveled edges of a relatively thick tire tread strip free of internal reinforcing cords by ultrasonic energy. A contact face of a sonic welding tool or horn is pressed against the mating overlapping edges of the strip at a cylinder pressure within a range of 20 psi to 80 psi. Ultrasonic energy is applied to the strip while the pressure is applied thereto for a period of between 2 seconds and 12 seconds to heat and soften the rubber compound of the strip. Pressure is maintained by the tool against the strip after application of the ultrasonic energy for a period of generally 2 seconds to permit the softened compound to cool, set and bond together to form a strong bond between the overlapped edges. The contact face of the horn generally matches the contour of the contacted surface of the strip. - 21 -

571194

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