System for moulding comprising a mould member, a method for moulding and a method for configuring a mould member
A system and a method for moulding food products from a pumpable foodstuff mass include a mould member having an outer surface. One or more recessed mould cavities are provided. An ejection fluid inlet opening of the mould member is arranged relatively movable with respect to an outlet opening of the ejection fluid source. Ejection fluid is allowed to enter the mould member when an outlet opening overlaps an ejection fluid inlet opening.
1. A system for moulding food products from a pumpable foodstuff mass, which system comprises:
a mould member comprising an outer surface wherein one or more recessed mould cavities are provided, and further an ejection fluid inlet opening and associated channel extending to a group of one or more mould cavities from which moulded food products are to be ejected simultaneously,
an ejection fluid source comprising an outlet opening,
in which system an ejection fluid inlet opening of the mould member is arranged relatively movable with respect to the outlet opening of the ejection fluid source so as to allow ejection fluid to enter the mould member when an outlet opening overlaps an ejection fluid inlet opening,
wherein the geometry of the ejection fluid inlet opening and the outlet opening of the ejection fluid source is such that at the initiation of the overlap there is a linear contact between the ejection fluid inlet opening and the outlet opening.
2. The system for moulding according to claim 1 , wherein the ejection fluid inlet opening and/or the outlet opening comprise an elongated leading portion, extending perpendicular to a direction of the relative movement.
3. The system for moulding according to claim 1 , wherein the ejection fluid inlet opening and/or the outlet opening has a quadrilateral perimeter, having an elongated leading portion and a trailing portion of equal length, in particular an isosceles trapezoid perimeter.
4. The system for moulding according to claim 3 , wherein the elongated leading portion is straight, or wherein the elongated leading portion is polygonal or curved, circumscribed by a circle having a radius significantly exceeding the diameter of the opening.
5. The system for moulding according to claim 1 , wherein the geometry of the outlet opening of the ejection fluid source and/or the inlet opening of the mould member is adjustable, in particular the size and/or the shape of the opening.
6. The system for moulding according to claim 1 , wherein the mould member comprises a permeable volume defining the outer surface wherein the mould cavities are provided, and the one or more channels extend to the one or more permeable volumes of the group of one or more mould cavities from which moulded food products are to be ejected simultaneously.
7. The system for moulding according to claim 1 , further comprising one or more of the following:
a frame for supporting the mould member;
a mould member drive system which, in operation, drives the mould member in a direction of movement at a mould member speed;
a mass feed member which, in operation, is arranged at a fill position relative to the outer surface of the mould member, said mass feed member being adapted to transfer pumpable foodstuff mass into passing mould cavities, said mass forming a food product in said mould cavity.
8. The system for moulding according to claim 1 , further comprising:
a mould member drive system which, in operation, moves the mould member in a direction of movement at a mould member speed;
an outlet opening drive system, which, in operation, moves the outlet opening of the ejection fluid source in a counter-direction of movement at a fluid source speed,
wherein the mould member speed and/or the fluid source speed is adjustable during operation, allowing to increase a size of overlapping area between the ejection fluid inlet opening and the outlet opening faster than with a constant speed of relative movement.
9. The system for moulding according to claim 1 , wherein a channel has a cross-sectional area exceeding the surface area of an associated ejection fluid inlet opening.
10. The system for moulding according to claim 1 , wherein the mould member is a rotary mould member, e.g. a rotary mould drum or a turret, which is rotatably supported by a frame about a longitudinal rotation axis, and
wherein a mould member drive system, in operation, rotates the mould member so as to revolve about the rotation axis in a direction of rotation.
11. A method for moulding food products from a pumpable foodstuff mass, wherein use is made of a system for moulding food products from a pumpable foodstuff mass according to claim 1 .
12. The method for configuring a mould member for use in a system for moulding food products from a pumpable foodstuff mass according to claim 1 , the method comprising the steps of:
providing a mould member comprising an outer surface wherein one or more recessed mould cavities are provided,
providing the mould member with an ejection fluid inlet opening and associated channel extending to a group of one or more mould cavities from which moulded food products are to be ejected simultaneously,
providing an ejection fluid source with an outlet opening,
arranging an ejection fluid inlet opening of the mould member relatively movable with respect to the outlet opening of the ejection fluid source, wherein ejection fluid is allowed to enter the mould member when an outlet opening overlaps an ejection fluid inlet opening,
wherein the geometry of the ejection fluid inlet opening and the outlet opening of the ejection fluid source is provided such that, in use and at a given speed of relative movement, at the initiation of the overlap there is a linear contact between the ejection fluid inlet opening and the outlet opening.
13. The method for configuring a mould member according to claim 12 , wherein the geometry of the ejection fluid inlet opening and/or the outlet opening is provided by providing an insert into respectively the ejection fluid inlet opening and/or the outlet opening.