Installation for moulding of three dimensional products from a mass of pumpable foodstuff material, for example from ground meat, wherein the installation comprises: - a pump having at least one pump chamber, an inlet, and an outlet for the foodstuff mass, - a pump drive, - a moulding device comprising: - a frame, - a mould member having multiple mould cavities, each having a filling opening for the introduction of foodstuff mass into the mould cavity, wherein the mould member is movably supported by the frame, - a mould member drive for moving the mould member along a path, said path including a fill position of a mould cavity where mass is filled into a mould cavity and a product release position of a mould cavity where a moulded product is released from the mould cavity, wherein the mobile mould member is provided with a pattern of multiple mould cavities with cavities at distinct perpendicular axis positions when seen perpendicular to the path of the mould member, - a mass feed member, preferably supported by the frame, said mass feed member having a chamber with an inlet for foodstuff mass and having a discharge mouth facing the mould member at the fill position along the path of the mould member, said inlet of the mass feed member being connected or adapted to be connected to the outlet of the pump, the mass feed member being adapted to transfer the foodstuff mass into a mould cavity of the mould member in a corresponding mould cavity filling event that is defined by the moment of first flow of foodstuff mass into the mould cavity and the moment wherein the mould cavity has been fully filled and flow of foodstuff mass therein is terminated, wherein - in use - the pump is operated so as to feed foodstuff mass to the mass feed member and establish a foodstuff mass pressure in the chamber of said mass feed member, and wherein the mass feed member is provided with multiple grinder devices at distinct perpendicular axis positions when seen perpendicular to the path of the mould member, each grinder device comprising a grinder member cooperating with a grinding face of an orificed grinder body, characterized in that the mass feed member is provided with an orificed mouth body which is stationary secured in the mass feed member and has multiple outlet orifices forming the mouth so that mass flows into a mould cavity via said multiple outlet orifices, and in that the mass feed member is provided with multiple mobile grinder members at said distinct perpendicular axis positions when seen perpendicular to the path of the mould member, each mobile grinder member cooperating with the grinding face of the orificed grinder body, and in that the installation comprises a grinder drive and associated grinder drive controller adapted to drive the mobile grinder members. - a pump having at least one pump chamber, an inlet, and an outlet for the foodstuff mass, - a pump drive, - a moulding device comprising: - a frame, - a mould member having multiple mould cavities, each having a filling opening for the introduction of foodstuff mass into the mould cavity, wherein the mould member is movably supported by the frame, - a frame, - a mould member having multiple mould cavities, each having a filling opening for the introduction of foodstuff mass into the mould cavity, - a mould member drive for moving the mould member along a path, said path including a fill position of a mould cavity where mass is filled into a mould cavity and a product release position of a mould cavity where a moulded product is released from the mould cavity, - a mass feed member, preferably supported by the frame, said mass feed member having a chamber with an inlet for foodstuff mass and having a discharge mouth facing the mould member at the fill position along the path of the mould member, said inlet of the mass feed member being connected or adapted to be connected to the outlet of the pump, the mass feed member being adapted to transfer the foodstuff mass into a mould cavity of the mould member in a corresponding mould cavity filling event that is defined by the moment of first flow of foodstuff mass into the mould cavity and the moment wherein the mould cavity has been fully filled and flow of foodstuff mass therein is terminated,