Method of forming a fabric seam by ultrasonic gap welding of...

D - Textiles – Paper – 21 – F

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D21F 1/00 (2006.01) B29C 65/00 (2006.01) B29C 65/08 (2006.01)

Patent

CA 2698120

The invention relates to ultrasonic gap welding of flat woven fabrics. Specifically, the invention relates to a method of ultrasonic welding the seam termination yarn ends of a fabric using a controlled gap. A mechanical stop (15) may be employed to control the distance or gap between the horn (26) and anvil to a predetermined level based on the depth of welding and amount of weld energy. By adding another degree of control, the ultrasonic gap welding technique of the present invention is able to achieve fabric seams that are stronger than conventional seams, and even those enhanced with gluing, and is conducive to formation of fabric seams by spot welding or along the termination yarn ends of the fabric.

L'invention concerne le soudage à écartement par ultrasons de tissus tissés à plat. Spécifiquement, l'invention concerne un procédé de soudage par ultrasons des extrémités des fils de terminaison des coutures d'un tissu à l'aide d'un écartement contrôlé. On peut employer une butée mécanique pour contrôler la distance ou l'écartement entre la corne et l'enclume à un niveau prédéterminé en fonction de la profondeur de la soudure et de la quantité d'énergie de soudage. En ajoutant un autre degré de contrôle, la technique de soudage à écartement par ultrasons selon la présente invention est capable de réaliser des coutures de tissu qui sont plus résistantes que les coutures classiques, y compris celles renforcées par de la colle, et mène à la formation de coutures de tissu par soudage par points ou le long des extrémités des fils de terminaison du tissu.

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