A forming head for dry forming a fibrous web

Details A forming head for dry forming a fibrous web A forming head for dry forming a fibrous web

D - Textiles, Paper

01

G

D01G 25/00 (2006.01) D04H 1/72 (2006.01)

Patent

CA 2711808

A forming head for dry forming a fibrous web The invention relates to a forming head (1,25) for dry forming a fibrous web, which forming head is positioned above a forming wire opposite a suction unit. The forming head (1,25) is divided into at least two independent interconnected distribution units (2,3,4,5,26,27,28,29,30,31) each of which comprises at least one revolving roller (11,12,13, 14,15,16,17,18,19,32,33,34,35,36,37,38,39,40,41) provided with protruding spikes (12). By dividing the forming head (1,25) into a plurality of interconnected distribution units (2,3,4,5,26,27,28,29,30,31), a more efficient disintegration of agglomerates, shadows and/or lumps in the fibre material is achieved compared to the known forming heads, thereby ensuring a more homogenous final product.

L'invention porte sur une tête de formation permettant de former à sec une nappe fibreuse. Selon l'invention, une tête de formation (1, 25) permet la formation à sec d'une nappe fibreuse, ladite tête de formation étant positionnée au-dessus d'une toile de formation à l'opposé d'une unité d'aspiration. La tête de formation (1, 25) est divisée en au moins deux unités de distribution indépendantes et interconnectées (2,3,4,5,26,27,28,29,30,31), chacune desdites unités comportant au moins un cylindre rotatif (11,12,13, 14,15,16,17,18,19,32,33,34,35,36,37,38,39,40,41) pourvu de pointes protubérantes (12). En divisant la tête de formation (1, 25) en une pluralité d'unités de distribution interconnectées (2, 3, 4, 5, 26, 27, 28, 29, 30, 31), on obtient une désintégration plus efficace des agglomérats, des amas et/ou des bosses dans le matériau fibreux par rapport au résultat obtenu avec les têtes de formations déjà connues, ce qui garantit ainsi un produit final plus homogène.

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