Welding of carpet to panels

Details Welding of carpet to panels Welding of carpet to panels

B - Operations, Transporting

29

C

B29C 65/16 (2006.01) B29C 65/02 (2006.01)

Patent

CA 2372462

A system and method for using a laser (18) to weld a plastic substrate material (12) to an adjacent material (14), such as a synthetic carpet panel. The materials are placed in contact with oppositely directed major surfaces, so as to provide an interface therebetween. The material closest to the laser (18) is transparent to a wavelength of the laser beam, so that the impinging laser beam can be focused at a focal region on the interface. The other material adjacent to the interface is absorbent to the wavelength, so that heating of the other material by the laser beam causes a pattern of a plurality of melt zones to be formed, each melt zone consisting of portions of each of the materials. Subsequent cooling of the melt zones causes the adjacent materials to become welded together. Additives are combined with the materials to modify their transmission and absorption characteristics with respect to visible light and laser wavelengths.

L'invention concerne un système et un procédé d'utilisation d'un laser (18) pour souder un substrat (12) en plastique à un matériau (14) adjacent tel qu'un carré de moquette synthétique. On met les matériaux en contact en tournant les surfaces principales dans des directions opposées, de manière à créer une interface entre les carrés. Le matériau le plus proche du laser (18) est transparent à la longueur d'onde du faisceau laser, ce qui permet de focaliser le faisceau laser incident dans une zone focale sur l'interface. L'autre matériau adjacent à l'interface absorbe la longueur d'onde, ce qui permet de chauffer ce matériau par le faisceau laser et, partant, de créer un motif de plusieurs zones de fusion, chaque zone de fusion étant constituée de plusieurs parties de chaque matériau. On refroidit ensuite ces zones de fusion, ce qui a pour effet de souder les uns aux autres les matériaux adjacents. On combine des additifs aux matériaux pour modifier leurs caractéristiques de transmission et d'absorption par rapport à la lumière visible et aux longueurs d'onde du laser.

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