Porous mould drum for poultry, pork, meat-replacement and vegetarian food

A rotary cylindrical mould member for moulding products from a food starting material comprising poultry, pork, meat-replacement and vegetarian food, the mould member having a longitudinal axis and an outer circumference, the mould member comprising at least one mould body having a curved outer surface forming at least part of the outer circumference of the mould member and an opposite inner surface, wherein the at least one mould body is made from a porous material with a porous structure of intercommunicating pores, wherein the outer circumference is at least partially sealed airtight, wherein the at least one mould body comprises at least one mould cavity in which the food starting material is moulded, the at least one mould cavity being formed in the curved outer surface, the at least one mould cavity comprising a porous bottom wall, a porous sidewall, and a boundary, wherein at least one of the porous bottom wall, the porous sidewall, and the boundary comprises a deformation layer formed by plastic deformation;

• from a milling operation, the at least one mould body comprises an inner volume between the deformation layer and the inner surface, the mould member further comprising a gas supply which forces a fluid gas through the inner volume and the deformation layer into the at least one mould cavity to assist with removal of moulded products from the at least one mould cavity, wherein an average flow resistance of the deformation layer (FR1) is 1%-30% of an average flow resistance of the inner volume (FR2).