Plant and method for dryly producing a non-woven fibre web...

D - Textiles – Paper – 04 – H

Patent

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Details

D04H 1/54 (2006.01) D04H 1/72 (2006.01) D21H 27/00 (2006.01)

Patent

CA 2408800

A plant comprising two air-lay stations (1; 2) placed one after the other serving for dryly producing a non-woven fibre web. Each station comprises a fibre feed duct (9; 26) for feeding fibres to the station from a fibre source (4; 16), an air-lay forming head (5; 19) connected to the fibre feed duct (9; 26) and at least partly defined by a perforated screen (6; 20), and a suction box (8; 23) for successively sucking fibres in the forming head (5; 19) through the screen (6; 20). A separate fibre source (4; 16) is part of each station (1; 2). The first station (1) furthermore has a fibre collector (8; 29) placed under the screen (6) of its forming head (5) whereas the second station (2) has a forming wire (22) placed under the screen (20) of its forming head (19). The two stations (1; 2) are connected to at least one conveyor (12; 13) for conveying fibres from the fibre collector (8; 29) of the first station (1) to the forming head (19) of the second station (2).

Cette installation comporte deux postes de flux d'air (1, 2), se faisant suite et servant à produire à sec une bande de fibres en non-tissé. Chaque poste comporte une conduite d'alimentation en fibres (9, 26) approvisionnant le poste depuis une source de fibres (4, 16), une tête de formation de flux d'air (5, 19), reliée à la conduite d'alimentation (9, 26) et au moins définie en partie par un écran perforé (6, 20), ainsi qu'un boîtier d'aspiration (8, 23) aspirant séquentiellement les fibres dans la tête (5, 19) à travers l'écran (6, 20). Une source de fibres distincte (4, 16) constitue une partie de chaque station (1, 2). Le premier poste (1) comporte, de plus, un collecteur de fibres (8, 29) placé sous l'écran (6) de sa tête de formation de flux (5) alors que le second poste (2) est pourvu d'un fil de formation (22) placé sous l'écran (20) de sa tête de formation de flux (19). Les deux postes (1, 2) sont reliés à au moins un convoyeur (12, 13) servant à transporter les fibres depuis le collecteur (8, 29) du premier poste (1) vers la tête de formation (19) du second poste (2).

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