Method and machine for production of a non-unravelling seam

Details Method and machine for production of a non-unravelling seam Method and machine for production of a non-unravelling seam

D - Textiles, Paper

05

B

D05B 17/00 (2006.01)

Patent

CA 2487565

The invention relates to a method and a machine for production of a non-unravelling seam (12) with at least one looped and interlaced seam thread with stitching holes in or through at least one thickness of the material of an object, called the sewed object (3). The stitching (12) is produced using at least one thread having a thermoplastic material at least on the outside thereof. An infrared laser beam (17, 18) is applied locally to the stitching (12), on the outside of the sewed object (3), suitable for local softening of the thermoplastic material located on the outside of at least one thread, extending along the outside of the sewed object (3) and adjacent to at least one other thread. A jet of air permits the mixing of the softened fibres and at least one pressing body (6) is then applied to the softened and mixed thermoplastic material of at least one thread such as to locally solidify adjacent threads together.

L'invention concerne un procédé et une machine de réalisation d'une couture entrebouclé(s) et/ou entrelacé(s) et avec des passages de piqûre dans ou à travers au moins une épaisseur de matière d'un objet, dit objet cousu (3). On réalise la couture (12) avec au moins un fil de couture présentant au moins sur l'extérieur, une matière thermoplastique. On applique au moins un faisceau laser infrarouge (17, 18) localement sur la couture (12), à l'extérieur de l'objet cousu (3), adapté pour ramollir ponctuellement la matière thermoplastique présentée à l'extérieur d'au moins un brin de fil s'étendant à l'extérieur de l'objet cousu (3), et adjacent d'au moins un autre brin de fil. Un jet d'air permettant d'entremêler les fibre ramollies, on applique ensuite au moins un organe presseur (6) sur la matière thermoplastique ramollie et entremêlée d'au moins un brin de fil de façon à solidariser les brins adjacents ensemble ponctuellement.

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