Method and device for producing casting cores and/or casting molds

Abstract

A method for producing casting cores and/or casting molds is provided. The core shooter and/or molding machine ( 1 ) has at least one shooting unit ( 2 ) including a shooting head ( 4 ), filled with a material to be shaped ( 50 ), especially a mixture of core or molding sand with a binder. The mixture is shot into a molding tool ( 100 ) by supplying pressurized air through a shooting board ( 5 ) which includes at least one shooting opening ( 6 ). At least one moveable mixing tool ( 7 ) is disposed in the shooting head ( 4 ) and is used to mechanically loosen the material to be shaped ( 50 ) present in the shooting unit ( 2 ) before, during or after shooting.

1 . Method for producing casting cores and/or casting molds with a core shooter and/or mold shooter ( 1 ) with at least one shooting unit ( 2 ), which has a shooting head ( 4 ) and in which a material to be shaped ( 50 ), comprising filling a mold with a mixture made from core or molding sand with a binder, by supplying compressed air through a shooting board ( 5 ) having at least one shooting opening ( 6 ) for shooting the material into the mold ( 100 ), and mechanically loosening the material to be shaped ( 50 ) present in the shooting unit ( 2 ) before, during, and/or after the shooting.  
   
   
       2 . Method according to  claim 1 , further comprising mixing the material to be shaped ( 50 ) during loosening.  
   
   
       3 . Device for producing casting cores and/or casting molds comprising at least one shooting unit ( 2 ) having a shooting head ( 4 ) to be filled with material to be shaped ( 50 ), especially core or molding sand with a binder, a shooting cylinder ( 3 ) used for supplying compressed air during shooting, a shooting board ( 5 ) having at least one shooting opening ( 6 ), and at least one moveable mixing tool ( 7 ) is arranged at least in the shooting head ( 4 ).  
   
   
       4 . Device according to  claim 3 , the mixing tool ( 7 ) can be driven in the shooting head ( 4 ), so that it rotates, about a longitudinal center axis of the shooting head ( 4 ).  
   
   
       5 . Device according to  claim 4 , wherein the mixing tool ( 7 ) has a drive ( 8 ) that drives a rotating shaft ( 9 ), which is oriented along the longitudinal center axis of the shooting unit ( 2 ) and on which at least one projecting mixing vane ( 10 ) is arranged.  
   
   
       6 . Device according to  claim 5 , wherein the drive ( 8 ) can be controlled before, during, and/or after the shooting process.  
   
   
       7 . Device according to  claim 3 , wherein the mixing tool ( 7 ) is arranged close to the shooting board ( 5 ), a center region of the shooting head ( 4 ).  
   
   
       8 . Device according to  claim 5 , wherein the drive ( 8 ) is arranged at an upper end of the shaft ( 9 ) and in an upper part of the shooting unit ( 2 ).  
   
   
       9 . Device according to  claim 5 , wherein a plurality, of mixing vanes ( 10 ) are arranged on the shaft ( 9 ).  
   
   
       10 . Device according to  claim 9 , wherein the mixing vanes ( 10 ) are oriented horizontally.  
   
   
       11 . Device according to  claim 9 , wherein a length of the mixing vanes ( 10 ) in the shooting cylinder ( 3 ) corresponds approximately to a radius of the shooting cylinder ( 3 ) and a lower one of the mixing vanes ( 10 ) in the shooting head ( 4 ) is longer than the mixing vane ( 10 ) in the shooting cylinder ( 3 ) and reaches at least to the shooting openings ( 6 ) and/or projects past the shooting openings ( 6 ).  
   
   
       12 . Device according to  claim 9 , wherein the shaft ( 9 ) reaches with a lower free end thereof nearly up to the shooting board ( 5 ) and the mixing vane ( 10 ) close to the shooting board ( 5 ) is arranged on or near a lower free end of the shaft ( 9 ).  
   
   
       13 . Device according to  claim 9 , wherein the mixing vane ( 10 ) is assembled from several individual vanes, and the individual vanes are mounted with inner ends thereof to the shaft ( 9 ) of the mixing tool ( 7 ) and point with outer free ends thereof radially in different directions.  
   
   
       14 . Device according to  claim 5 , wherein the mixing tool ( 7 ) is fixed detachably to the drive ( 8 ) and can be removed therefrom.  
   
   
       15 . Device according to  claim 3 , wherein a discharge opening ( 11 ) for removing excess material to be shaped ( 50 ) is provided in the shooting head ( 4 ).  
   
   
       16 . Device according to  claim 13 , wherein the mixing vane ( 10 ) is assembled from two separate vanes arranged as a mixing vane pair.