DEVICE AND METHOD FOR GYPSUM SUSPENSION FRACTIONATING AND METHOD FOR GYPSUM BOARD PRODUCTION Russian patent published in 2007 - IPC B28B13/02 B28B19/00 

FIELD: feeding the unshaped material to moulds or apparatus for producing shaped articles, particularly gypsum boards.

SUBSTANCE: fractionating device cuts gypsum suspension at mixing means outlet for calcined gypsum mixing with water. Mixing means has hollow connection section providing gypsum suspension flowing from mixing zone inside mixing means into hopper section and hopper section to apply gypsum suspension on paperboard for gypsum board facing through suspension discharge orifice. Fractionating device comprises suspension cutting orifice opened in hopper section and hollow connection section. Device delivers gypsum suspension portion from hopper section or connection section in suspension discharge pipes. Gypsum suspension cutting method involves using described fractionating device.

EFFECT: increased reliability of gypsum suspension density control and possibility to decrease fractionated suspension flow rate change, decreased foam or foaming agent consumption along with final product quality retention.

17 cl, 12 dwg, 3 ex