Sand casting tool and method for the installation thereof

Abstract

1. Method for installing a sand casting tool and appropriate casting tool. 2.1. The invention relates to a method for installing a sand casting tool comprising at least one mold element ( 10 ) having a mold recess ( 14 a ) which at least partially defines the contour of a sand casting to be produced, at least one leveling rod holding device ( 40 ) which is displaceable in the direction of a Z-axis relative to said mold element ( 10 ) and which is disposed on the side of the mold element ( 10 ) facing away from said mold recess ( 14 a ), at least one leveling rod ( 30 ) capable of being inserted through an access bore ( 20 ) in said mold element from the outside surface of said mold element ( 10 ) as far as said mold recess ( 14 a ) and which can be attached in a fixed position to said leveling rod holding device ( 40 ). 2.2. The invention includes the following steps: A. insertion of the leveling rod ( 30 ) in the direction ( 2 ) of the Z-axis into the access bore ( 20 ) of said mold element ( 10 ), and B. attachment of said leveling rod ( 30 ) to said leveling rod holding device ( 40 ). 2.3. The use thereof, particularly for achieving high precision of position and alignment of the leveling rods relative to the leveling plate. 3. FIG. 2 a.

1 . A method for installing a sand casting tool comprising
 at least one mold element having a mold recess which at least partially defines the contour of a sand casting to be produced,   at least one leveling rod holding device which is displaceable in the direction of a Z-axis relative to said mold element and which is disposed on the side of the mold element facing away from said mold recess,   at least one leveling rod capable of being inserted through an access bore in said mold element from the outside surface of said mold element as far as said mold recess and which can be attached in a fixed position to said leveling rod holding device,   characterized by the following method steps:   A. insertion of the leveling rod in the direction of the Z-axis into the access bore in said mold element,   B. attachment of said leveling rod to said leveling rod holding device.   
     
     
         2 . The method as defined in  claim 1 ,
 characterized in that   said leveling rod is aligned by insertion thereof in method step A relative to the mold element, by which means the freedom of movement of the leveling rod relative to said mold element is restricted preferably to such an extent that   in the direction of an X-axis and in the direction of a Y-axis aligned orthogonally to each other and to the Z-axis, the leveling rod is translatively movable relative to said mold element by not more than 0.5 mm, and the leveling rod is rotatably tiltable about the X-axis and the Y-axis in each case by not more than 3°.   
     
     
         3 . The method as defined in  claim 2 ,
 characterized in that,   in method step A, an alignment insert is inserted into said access bore in addition to said leveling rod and said alignment insert ensures, due to touching contact with a wall of said access bore and with said leveling rod, that, in the inserted state, the freedom of movement of said leveling rod relative to said mold element is restricted.   
     
     
         4 . The method as defined in  claim 1 ,
 characterized in that   the leveling rod is moved, in method step A, into said access bore to such an extent that it protrudes into said mold recess.   
     
     
         5 . The method as defined in  claim 1 ,
 characterized in that,   in method step A, a plurality of leveling rods are inserted into respectively assigned access bores and, in the following method step B, this plurality of leveling rods are attached to a common leveling rod holding device.   
     
     
         6 . A sand casting tool for the production of sand castings, comprising
 a mold element having a mold recess which at least partially defines the contour of the sand casting to be produced, and   at least one leveling rod adapted to be moved, through an access bore located in said mold element and aligned in the direction of a Z-axis, from an outside surface of said mold element as far as at least said mold recess, and a distal end of said leveling rod, in an operational position of said leveling rod, closes said mold recess end of said access bore at least substantially flush therewith,   characterized in that   the access bore and the leveling rod are, as regards shape, adapted to match each other such that in an mounting state, in which said leveling rod is inserted in the access bore, the freedom of movement of said leveling rod relative to said mold element is restricted such that   in the direction of an X-axis and in the direction of a Y-axis aligned orthogonally to each other and to the Z-axis, the leveling rod is translatively movable relative to said mold element by not more than 0.5 mm, and   the, leveling rod is rotatably tiltable about the X-axis and the Y-axis in each case by not more than 3°.   
     
     
         7 . The sand casting tool according to the preamble of  claim 6 ,
 characterized by   an alignment insert adapted to be insertable together with said leveling rod into said access bore, and said access bore, said alignment insert, and said leveling rod are, as regards the shape thereof, adapted to match each other such that in an mounting state, in which said leveling rod and said alignment insert are inserted in said access bore, the freedom of movement of the leveling rod relative to said mold element is restricted to such an extent that   in the direction of an X-axis and in the direction of a Y-axis aligned orthogonally to each other and to the Z-axis, the leveling rod is translatively movable relative to said mold element by not more than 0.5 mm, and   the leveling rod is rotatably tiltable about the X-axis and the Y-axis in each case by not more than 3°.   
     
     
         8 . The sand casting tool as defined in  claim 7 ,
 characterized in that   said alignment insert
 is in the form of an alignment ring, which in the mounting state rests with its outside surface against the inside surface of said access bore and with its inside surface against said leveling rod, or 
 is in the form of an alignment cap mounted on the distal end of said leveling rod. 
   
     
     
         9 . The sand casting tool as defined in  claim 7 ,
 characterized in that   said alignment insert is firmly attached to said leveling rod.   
     
     
         10 . The sand casting tool as defined in  claim 9 ,
 characterized in that   said alignment insert is attached to the leveling rod in such a manner that, on acquiring the functional position of the leveling rod, an annular gap between said leveling rod and the inside surface of said access bore is at least not completely closed thereby.   
     
     
         11 . The sand casting tool as defined in  claim 6 ,
 characterized in that   in the mounting state the translative displaceability of said leveling rod relative to said mold element is restricted in the direction of the X-axis and in the direction of the Y-axis to not more than 0.3 mm and preferably not more than 0.2 mm.   
     
     
         12 . The sand casting tool as defined in  claim 6 ,
 characterized in that   in the mounting state, the rotatable tiltability of said leveling rod relative to said mold element is restricted to not more than 2°, preferably not more than 1°.   
     
     
         13 . The sand casting tool as defined in  claim 6 ,
 characterized by   a leveling rod holding device, which is displaceable relative to said mold element in the direction of the Z-axis and can be attached to said leveling rod by means of a securing element, which securing element allows for adjustment of the position of attachment of the leveling rod on the leveling rod holding device in the X-direction and/or the Y-direction.   
     
     
         14 . The sand casting tool as defined in  claim 13 ,
 characterized in that   said securing element comprises
 a threaded bore in said leveling rod, 
 a corresponding screw, and 
 a through bore in the leveling rod holding device, 
   which through bore has an inside diameter which, for the purpose of ensuring adjustability of the position of attachment, is greater than the outside diameter of the thread of said screw.   
     
     
         15 . The sand casting tool as defined in  claim 6 ,
 characterized in that   a plurality of leveling rods with assigned access bores is provided, and the individual leveling rods are capable of being attached via a separate securing element to a common leveling rod holding device.