Scraper blade and method of manufacturing the same

B - Operations – Transporting – 65 – G

Patent

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Details

B65G 45/12 (2006.01) B29C 70/68 (2006.01)

Patent

CA 2624582

A scraper blade adapted to scrape off material from a conveyor bel surface (24) has a scraper tip (15) at one end and a mounting bas (16) at its other end and is tapered towards the tip at least in th outer end of the scraper blade, its scraper blade portion whic extends from the tip (15) and to a point adjacent to or in th mounting base (16) being made with at least two layers (40, 41) , which extend longitudinally along said scraper blade portion, and i characterised in that at least one first layer (40) is made o polyurethane with a lower hardness and a higher abrasion resistanc than at least one second layer (41) which is mainly made o polycarbonate plastic, said at least one second polycarbonat plastic layer (41) being adapted to reinforce and stiffen said a least one first layer, which constitutes a main contact surface (42) against said surface (24) . A method of manufacturing scraper blade for scraping webs of material is also included.

L'invention concerne une lame de raclage pour racler de la matière d'une surface de courroie transporteuse (24), qui a une pointe de raclage (15) à une extrémité et une base de fixation (16) à son autre extrémité et qui est effilée vers la pointe au moins au niveau de l'extrémité extérieure de la lame de raclage, sa portion de lame de raclage qui s'étend depuis la pointe (15) et jusqu'à un point adjacent à la base de fixation (16) ou à l'intérieur de celle-ci, étant fabriquée avec au moins deux couches (40, 41) qui s'étendent longitudinalement le long de ladite portion de lame de raclage. L'invention est caractérisée en ce qu'au moins une première couche (40) est fabriquée en polyuréthane de dureté inférieure et de résistance à l'abrasion supérieure à au moins une deuxième couche (41) qui est principalement fabriquée en plastique polycarbonate, ladite au moins une deuxième couche de plastique polycarbonate (41) étant destinée à renforcer et rigidifier ladite au moins une première couche, qui constitue une surface de contact prinicpale (42) contre ladite surface (24). Un procédé de fabrication d'une lame de raclage pour racler des bandes de matière est également divulgué.

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