In a method for making a membrane module short, hollow, non-sintered ceramic or metal fibres (11, 13), which contain a polymer binder, and long sintered fibres (3) are slid over metal rods (9). The rods (9) are then inserted at their ends in perforated mould plates (15, 17). After that ceramic or metal flanges are made in the mould plates between and round the ends of the sintered fibres (3) by heating the short fibres (11, 13) until they become fluid and fill the moulding plates (15, 17). The two mould plates (15, 17) are then pressed towards each other. Finally, the mould plates (15, 17) are taken off, the binder in the flanges is removed using thermal diffusion, and the flanges are sintered.
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