Patent DE-10020767-B4 (DE)
Title: Casting tool useful in a casting machine for the production of the cast products, comprises a lower molded part having an upwardly opened mold recess, an ejector unit having an ejector pin, two force transmission members, and a tool bed
Inventor: WEBER RUDOLF
IPC: C11D3/33
Filed: 2000-04-27
Granted: 2008-12-04
Abstract: The casting tool comprises a lower molded part (20) having an upwardly opened mold recess (18), which defines a part of a shape of the cast products to be produced, an ejector unit (30) having an ejector pin (34) relatively movable opposite to the lower molded part in a direction of a vertical Z-axis, where a basic part of the ejector unit, to which the ejector pin is fixed, is arranged in an ejection area below the lower molded part, two force transmission members extended in the direction of the Z-axis, and a tool bed arranged below the basic part. The casting tool comprises a lower molded part (20) having an upwardly opened mold recess (18), which defines a part of a shape of the cast products to be produced, an ejector unit (30) having an ejector pin (34) relatively movable opposite to the lower molded part in a direction of a vertical Z-axis, where a basic part of the ejector unit, to which the ejector pin is fixed, is arranged in an ejection area below the lower molded part, two force transmission members extended in the direction of the Z-axis and designed to introduce the force in the molded part into a machine bed of the casting machine arranged below the casting tool from the top, where an external force transmission member is arranged next to the basic part displaced in horizontal direction and an internal force transmission member extends into the basic part through an aperture, and a tool bed arranged below the basic part and fixedly connected with one of the force transmission members. The tool bed is designed, so that the forces introduced into the external force transmission member and the internal force transmission member from the top are introduced into the tool bed. The ejector pin is engaged into the mold recess of the lower molded part by the displacement of the ejector unit against the lower molded part. The tool bed extends into a horizontal plane, so that it overtops the basic part of the ejector unit on all sides in horizontal direction. The external force transmission member is formed as rotating frame, which encompasses the basic part on all sides in the horizontal manner. The rotating frame has four sides, which are arranged in the form of rectangular, where the tool bed extends itself up to below all the four sides of the frame. The tool bed is rotatably and gas-tightly connected with the frame. The actuation projections are introduced at a lower side of the basic part of the ejector unit and extend up to into the aperture extending in the direction of the Z-axis. The plane contact areas are provided at the lower side of the tool bed for direct contact with the machine bed of the casting machine, where an inner contact area is directly arranged below the basic part and an outer contact area is arranged to the basic part displaced in the horizontal direction. Three internal force transmission members are provided and are arranged related to a horizontal plane. The tool bed has three plates arranged on top of each other and fixedly connected with one another. The top of the plates contacts with the two force transmission members and the bottom of the plates contacts with the machine bed. An intermediate plate consists of aluminum or aluminum alloy, and has a thickness of 30 mm and/or several holes extending in the direction of the Z-axis. One of the force transmission members is fixed only on one side at the lower molded part and tool bed. An independent claim is included for a casting machine.