Method for producing a rotary cylindrical mould member, which is adapted to be used in a system for moulding three-dimensional products from a mass of one or more food starting materials which are suitable for consumption, e.g. a meat mass, the cylindrical mould member having a longitudinal axis, a peripheral cylindrical outer surface and two axial mould member end faces (20a, 20a'), the method comprising the steps of: • preparing at least one mould body having a curved outer surface, forming at least part of the cylindrical outer surface of the mould member and an opposite inner surface, which mould body is made at least partially from a porous first plastic, forming a porous structure of intercommunicating pores opening out at the inner surface of the mould body, and wherein the curved outer surface is sealed airtight; wherein one or more recessed mould cavities are formed in the outer peripheral cylindrical surface of the mould body, defining the shape of the products which are to be produced, the mould cavities being open in the outer surface of the mould body to allow for the filling of the mould cavity with said mass of one or more food starting materials and being defined by a mould cavity wall that is at least partially porous; and • preparing a support member made from a non-porous second plastic, which support member has a support surface; ∘ which support member defines one or more fluid channels, recessed in the support surface, extending from a fluid opening at a mould member end face, adapted to provide fluid communication between the fluid opening via the fluid channel and via the pores opening out at the inner surface of the mould body to the porous mould cavity wall; • providing the support surface of the support member adjacent the inner surface of the mould body; characterized by the steps of: • providing heat emitting parts or particles close to the inner surface of the mould body and/or the supporting surface of the support member; • providing energy to the heat emitting parts or particles, thereby causing the parts or particles to emit heat and thereby locally melt the adjacent porous first plastic and the second plastic to obtain a weld and thereby secure the support member and the mould body to each other, wherein the heat emitting part is a porous film/ braid/ mesh/ wire screen, provided between the inner surface of the mould body and the supporting surface of the support member, or wherein the heat emitting parts are metal strips or wires, provided at or near the support surface of the support member. • preparing at least one mould body having a curved outer surface, forming at least part of the cylindrical outer surface of the mould member and an opposite inner surface, which mould body is made at least partially from a porous first plastic, forming a porous structure of intercommunicating pores opening out at the inner surface of the mould body, and wherein the curved outer surface is sealed airtight; wherein one or more recessed mould cavities are formed in the outer peripheral cylindrical surface of the mould body, defining the shape of the products which are to be produced, the mould cavities being open in the outer surface of the mould body to allow for the filling of the mould cavity with said mass of one or more food starting materials and being defined by a mould cavity wall that is at least partially porous; and • preparing a support member made from a non-porous second plastic, which support member has a support surface; ∘ which support member defines one or more fluid channels, recessed in the support surface, extending from a fluid opening at a mould member end face, adapted to provide fluid communication between the fluid opening via the fluid channel and via the pores opening out at the inner surface of the mould body to the porous mould cavity wall; • providing the support surface of the support member adjacent the inner surface of the mould body; • providing heat emitting parts or particles close to the inner surface of the mould body and/or the supporting surface of the support member; • providing energy to the heat emitting parts or particles, thereby causing the parts or particles to emit heat and thereby locally melt the adjacent porous first plastic and the second plastic to obtain a weld and thereby secure the support member and the mould body to each other,