Heat-welding of plastics by radiation

Details Heat-welding of plastics by radiation Heat-welding of plastics by radiation

B - Operations, Transporting

29

C

B29C 65/14 (2006.01) B29C 35/10 (2006.01) B29C 65/00 (2006.01) B29C 65/50 (2006.01) G01N 21/88 (2006.01) B29C 35/08 (2006.01) B29C 53/38 (2006.01) B29C 65/62 (2006.01)

Patent

CA 2260958

Method and apparatus for applying (15) radiation through one of members (17; 19, 20) to be joined by heat welding to enter layer(s) (18) interposed between the two members (17; 19, 20) relies on inclusions through thickness of the layer(s) (18) to be responsive to said radiation to raise temperature through thickness and promote bonds at interfaces with surfaces of said members (17; 19, 20). Resulting is assessed using thermal imaging (16) relying on different radiation from the layer(s) (18) from that for heating, specifically mid- infrared compared with near visible.

Procédé et dispositif servant à appliquer (15) un rayonnement à travers un des éléments (17; 19, 20) à réunir par soudure thermique, de manière à pénétrer dans la ou les couches (18) intercalées entre les deux éléments (17; 19, 20). Des inclusions à travers l'épaisseur de la couche ou des couches (18) réagissent à ce rayonnement afin d'élever la température à travers l'épaisseur et de provoquer la création de points d'adhérence au niveau de faces de contact avec les surfaces desdits éléments (17; 19, 20). On vérifie le résultat au moyen d'une technique d'imagerie thermique (16) basée sur un rayonnement émis par la ou les couches (18) différent de celui qui est émis par un réchauffement, à savoir un rayonnement mi-infrarouge par rapport à un rayonnement proche du visible.

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