Method and device for extruding a continuous moulded body

Details Method and device for extruding a continuous moulded body Method and device for extruding a continuous moulded body

D - Textiles, Paper

01

D

D01D 5/06 (2006.01) D01D 10/04 (2006.01) D01F 2/00 (2006.01)

Patent

CA 2417723

The present invention relates to an apparatus and a method as well as a system for extruding continuously molded bodies for producing filaments or staple fibers from an extrusion solution, such as a cellulose solution containing water, cellulose and tertiary amine oxide such as N-methylmorpholine N-oxide. in comparison with the methods known from the prior art, profitability can be increased in the production of continuously molded bodies (3) if the extrusion rate v is set to a value v = B . T0.33. 10000 . (1/r2). In a system, profitability can be enhanced if the number r of rows is r = ((B/v) .10000 . T0.33]1/2.. T is here the fiber titer in T dtex, v the extrusion rate in m/min, r the number of the rows of extrusion duct orfices (12), and B an operational parameter which is not more than 4 and at least 0.5.

Procédé, dispositif et installation d'extrusion de corps moulés continus pour la production de filaments ou de fibres discontinues à partir d'une solution d'extrusion, par exemple une solution de cellulose contenant de l'eau, de la cellulose et un oxyde d'amine tertiaire, tel que du N-méthylmorpholine-N-oxyde. Par rapport aux procédés connus de l'art antérieur, le rendement lors de la production de corps moulés continus (3) peut être amélioré lorsque la vitesse d'extrusion est réglée à une valeur v = B.T<0,33>.10000.(1/r<2>). Dans une installation, le rendement peut être amélioré lorsque le nombre de rangées r est égal à [(B/v).10000.T<0,33>] <1/2>. Dans cette formule, T est le titre de fils en T dtex, v la vitesse d'extrusion en m/min, r le nombre des rangées d'ouvertures (12) de canaux d'extrusion et B un paramètre de fonctionnement qui vaut au plus 4 et au minimum 0,5.

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