초록 ▼

The invention relates to a casting machine (1) for casting a flowable mass (M), in particular a flowable mass with suspended solid particles. Said casting machine comprises a mass container (2) for receiving the flowable mass and at least one valve (32, 42; 50; 60; 70; 80; 90; 100; 110; 120) that is

The invention relates to a casting machine (1) for casting a flowable mass (M), in particular a flowable mass with suspended solid particles. Said casting machine comprises a mass container (2) for receiving the flowable mass and at least one valve (32, 42; 50; 60; 70; 80; 90; 100; 110; 120) that is fluidically connected to the inner area of the mass container. When the pressure changes in the direction of the valve along the valve passage, said valve is in the open state and in the absence of a pressure change in the direction of the valve passage, said valve is in the closed state. The casting machine also comprises pressure generating means (3, 4, 5, 6, 32, 42) for generating a change in the pressure in the direction of the valve passage. Said valve (50; 60; 70; 80; 90; 100; 110; 120) comprises a valve body (51; 61; 71; 81; 91; 101; 111; 121) comprising a valve opening and at least one valve cover (53; 64; 76; 83; 94; 105; 115; 128) that is oriented towards the valve opening, articulated on the valve body and is subjected to an elastic prestressing that presses the valve cover against the valve opening and seals it. The invention also relates to a valve (50; 60; 70; 80; 90; 100; 110; 120) and to pressure generating means (3, 4, 5, 6, 32, 42) that are suitable for the modular construction of the claimed casting machine (1).

대표청구항 ▼

1. A casting machine for casting a flowable mass, comprising: a mass container for receiving the flowable mass;at least one valve which is fluidically connected to the interior space of the mass container, the valve being in an open state in the presence of a pressure gradient along the flowing-thro

1. A casting machine for casting a flowable mass, comprising: a mass container for receiving the flowable mass;at least one valve which is fluidically connected to the interior space of the mass container, the valve being in an open state in the presence of a pressure gradient along the flowing-through direction of said valve and in a closed state in the absence of this pressure gradient along the flowing-through direction of said valve; anda pressure generating means for generating a pressure gradient along the flowing-through direction of the valve; whereinthe valve has a valve body with a valve opening and at least one valve flap assigned to the valve opening, which flap is articulated on the valve body and is subjected to an elastic prestressing which presses the valve flap against the valve opening and seals it;the pressure generating means is a metering chamber with variable chamber volume and with at least one metering chamber outlet valve and one metering chamber inlet valve, the metering chamber inlet valve being arranged in the fluidic connection between the mass container volume and the metering chamber volume; anda base of the mass container contains a multiplicity of holes, each of which opening out into one of upper valve channels. 2. A casting machine as claimed in claim 1, wherein the valve flap is flexible. 3. A casting machine as claimed in claim 1, wherein the valve flap consists of elastomer material which lies against the valve opening in the prestressed state. 4. A casting machine as claimed in claim 1, wherein the valve has at least two valve flaps assigned to the valve opening, which valve flaps are articulated on the valve body and are each subjected to an elastic prestressing which presses the valve flaps against one another and seals the valve opening. 5. A casting machine as claimed in claim 4, wherein the flap edge of the at least one valve flap of the valve, projected perpendicularly to the flowing-through direction of the valve onto a valve cross-sectional plane, extends from a first radially outer point of the valve cross-sectional plane over a radially central point of the valve cross-sectional plane to a second radially outer point of the valve cross-sectional plane. 6. A casting machine as claimed in claim 1, wherein the valve has at least three valve flaps assigned to the valve opening, which valve flaps are articulated on the valve body in a peripheral region and are each subjected to an elastic prestressing which presses the valve flaps against one another and seals the valve opening, the valve having a pyramidal shape which is elevated in the direction of the flowing-through direction of the valve and the pyramidal faces of which are respectively formed by a valve flap, whereby, between two respective pyramidal faces adjacent to one another a valve slit respectively extends from a radially outer point to the radial center. 7. A casting machine as claimed in claim 6, wherein the valve has three, four, five or six valve flaps and has a respectively three-, four-, five- or six-faced pyramidal shape. 8. A casting machine as claimed in claim 6, wherein the pyramidal faces, seen from the tip of the pyramid, are each concavely shaped and formed by a respective concavely shaped valve flap, the concavity of which extends between the delimiting valve slits of the flap and the peripheral articulating region. 9. A casting machine as claimed in claim 6, wherein the pyramidal faces, seen from the tip of the pyramid, are each convexly shaped and formed by a respective convexly shaped valve flap, the convexity of which extends between the delimiting valve slits of the flap and the peripheral articulating region. 10. A casting machine as claimed in claim 1, wherein the valve body and the at least one valve flap are formed in one piece. 11. A casting machine as claimed in claim 10, wherein the valve body and the at least one valve flap of the valve are formed as an elastomer molding. 12. A casting machine as claimed in claim 10, wherein the valve body and the at least one valve flap of the valve are connected to one another. 13. A casting machine as claimed in claim 11, wherein the valve is coupled with a stabilizing element or stiffening element. 14. A casting machine as claimed in claim 13, wherein the valve body and/or the at least one valve flap is coupled with a stabilizing element or stiffening element. 15. A casting machine as claimed in claim 13, wherein the stabilizing element or stiffening element consists of a first material and the valve or the valve body and/or the at least one valve consists of a second material, the modulus of elasticity of the first material being greater than the modulus of elasticity of the second material. 16. A casting machine as claimed in claim 10, wherein the valve body is arranged in a valve seat which surrounds it in the manner of an annulus or a ring and consists of the second material. 17. A casting machine as claimed in claim 1, wherein, on account of the deformation of the valve, during the transition from the closed state to the open state of the valve or during the transition from the open state to the closed state of the valve, the at least one valve passes through a pressure point at which the potential energy stored in the valve is at a maximum. 18. A casting machine as claimed in claim 17, wherein the deformation of the valve is an eversion of a valve flap from a concave form of the valve flap to a convex form of the valve flap or from a convex form of the valve flap to a concave form of the valve flap. 19. A casting machine for casting a flowable mass, comprising: a mass container for receiving the flowable mass;at least one valve which is fluidically connected to the interior space of the mass container, the valve being in an open state in the presence of a pressure gradient along the flowing-through direction of said valve and in a closed state in the absence of this pressure gradient along the flowing-through direction of said valve; anda pressure generating means for generating a pressure gradient along the flowing-through direction of the valve; whereinthe valve has a valve body with a valve opening and at least one valve flap assigned to the valve opening, which flap is articulated on the valve body and is subjected to an elastic prestressing which presses the valve flap against the valve opening and seals it;the pressure generating means is a metering chamber with variable chamber volume and with at least one metering chamber outlet valve and one metering chamber inlet valve, the metering chamber inlet valve being arranged in the fluidic connection between the mass container volume and the metering chamber volume; andthe casting machine comprises a plurality of metering chambers arranged such that they are connected in parallel in the casting machine.