Method and moulding devices for moulding three-dimensional products
The invention provides a method for molding three-dimensional products from a mass of foodstuff starting materials which are suitable for consumption, in particular a meal mass. The method comprises the steps of filling a mold cavity, which is open on one side, with the mass of foodstuff starting materials which are suitable for consumption, which mold cavity is defined by a boundary comprising walls and base, in order to mold a molded three-dimensional product, and the removal of the molded three-dimensional product from the mold cavity. In the method according to the invention, during removal the adhesion forces between the molded product and the boundary are eliminated virtually simultaneously along all the interfaces.
1. A moulding device for moulding three-dimensional products from a meat mass suitable for consumption, comprising:
a rotatable moulding drum having a longitudinal axis and axial ends, said drum comprising:
a cylindrical drum wall having an outer peripheral cylindrical surface,
multiple mould cavities formed in the outer peripheral surface of the drum wall, which mould cavities define the shape of the products which are to be produced, the mould cavities being open on one side and defined by a boundary comprising walls and base,
a drum drive, adapted to rotate the rum in a direction of rotation about the longitudinal axis thereof,
a mass feed member arranged at a mass feed position along the outer peripheral cylindrical surface of the moulding drum and adapted to feed said mass to passing mould cavities, which mass feed member comprises:
a housing with an inlet side and a drum side which faces the drum,
a through-passage provided in the housing for the said mass of foodstuff to pass from an inlet towards an outlet located on the drum side,
a flexible plate located at the drum side of the housing in which the outlet to a mould cavity is provided, extending on either side of the outlet over a distance which covers at least one mould cavity,
a pressure medium operated excess-pressure device, arranged between the drum side of the housing and the flexible plate over a distance which essentially covers said flexible plate, said excess-pressure device being adapted to apply a pressure onto said flexible plate to flexibly bear the plate in sealing engagement against the outer peripheral cylindrical surface of the drum, to adjust in a sealing manner to irregularities in the outer peripheral cylindrical surface of the drum.
2. Moulding device according to claim 1 , wherein the pressure medium is compressed air or pressurized water or other liquid.
3. Moulding device according to claim 1 , wherein the excess-pressure device comprise at least one pressure cushion.
4. Moulding device according to claim 1 , wherein the flexible plate is made from a flexible plastic.
5. Moulding device according to claim 1 , further comprising a pressurized fluid feed member in fluid communication with the boundary of a mould cavity and a further excess-pressure device for supplying a further pressurized fluid, which pressurized fluid feed member is adapted to apply the further pressurized fluid for eliminating adhesion forces between the boundary of a mould cavity and a moulded product, to assist the removal of moulded product from the one or more mould cavities at a product removal position along the outer peripheral cylindrical surface of the moulding drum.
6. Moulding device according to claim 1 , further comprising a reduced pressure device for forming a reduced pressure in the mould cavities, the boundary of the mould cavities at least in part being provided with a number of pore openings which are in communication with the reduced-pressure device.
7. Moulding device according to claim 5 , further comprising a reduced pressure device for forming a reduced pressure in the mould cavities, the boundary of the mould cavities at least in part being provided with a large number of fine openings which are in communication with the reduced-pressure device.
8. Moulding device according to claim 5 , further comprising an end piece at one of the axial ends of the drum and wherein a fluid communication is formed by a connecting passage in communication with the boundary of a mould cavity and an opening in said end piece of the drum.
9. Moulding device according to claim 6 , further comprising an end piece at one of the axial ends of the drum and wherein a fluid communication is formed by a connecting passage in communication with the boundary of a mould cavity and an opening in said end piece of the drum.
10. Moulding device according to claim 5 , wherein the pressurized fluid feed member comprises an air compressor adapted to provide pressurized air to the distribution channel of mould cavities that arrive at the product removal position.
11. Moulding device according to claim 1 , wherein the moulding device further comprises a discharge belt arranged beneath the drum to receive products dropped from mould cavities passing a product removal position above the discharge belt.
12. Moulding device according to claim 1 , wherein the mould cavities are distributed about the drum wall in peripheral direction and in a direction of rotation of the drum.
13. Moulding device according to claim 1 , wherein the boundary of the mould cavity comprising a porous plastic or porous sintered metal forming a porous structure of intercommunicating pores opening out in said one or more mould cavities.