DISCOID FILTRATION BODY

摘要

The invention relates to a method for the production of a discoid filtration body (filter plate), comprising two internally connected support bodies, made from porous material and which enclose filtrate drain channels between them and at least one membrane filter layer on the external side of the support body halves. The invention is characterised by the following method steps: both support body halves (3.2, 3.3) are produced by casting after the slip casting method; the casting mould (10) comprises a porous, optionally hydrophilic material; the mould cavity is shaped such that the inner contour thereof closely corresponds to the external contour of the support body (3.2, 3.3); for the production of both connected support body halves (3.2, 3.3), a first amount of suspended support body material, corresponding to a support body half (3.2), is poured into the mould; an intermediate body (3.7), functioning as mould core with recesses and made from a material which is volatile to heat treatment is applied to the first amount of suspended support body material; a second amount of suspended support body material, which corresponds to the second support body half (3.3), is poured into the mould (10.1); the surface of said second casting is optionally brought in to contact with a cover (10.2) for the mould; the complete moulded piece comprising the both connected support body halves (3.2, 3.3) and the intermediate body is taken from the mould (10), sintered and, optionally, worked; and at least one filtering layer (3.5) is mounted on the outer surface of the moulded piece.