METHOD OF MOLDING OF FIBROUS NONWOVEN CLOTH FROM FOAM-FIBER MIXTURE WITH USE OF PROCESS OF DILLUTION WITH FOAM Russian patent published in 2003 - IPC

FIELD: pulp-and-paper industry. SUBSTANCE: nonwoven fibrous cloth is made by its molding from foam-fiber mixture with use of distributing box. Said box has body with the first and second opposite ends including inlet for supply of foam-fiber mixture at the first end and optional outlet with valve at the second end. Central section of distributing box body has cross-section reducing from inlet to outlet. Central section has also the first and second basically dead side walls, permeable front wall having effective length, and rear wall located against front wall. Walls may be flat or rounded. Any suitable devices are used for supply of the second foam, for instance, basically free of fiber or foam fiber mixture to central section through rear wall. With use of pressure pickups, introduced through one or both side walls, pressure inside central section may be determined and supply of mixture at inlet and discharge through outlet and/or supply of the second foam through rear wall may be automatically regulated so as to maintain surface density of mass of foam-fiber mixture passing through front wall, basically, at constant level along effective length of front wall. EFFECT: higher uniformity of surface density mass of produced fibrous nonwoven cloth. 23 cl, 13 dwg, 1 tbl