Method for Producing a Casting Core and a Casting Core

Abstract

A method for the production of a casting core is provided. The method includes preparing a mold which has at least one cavity and at least one filling opening which is fluidically connected to the cavity, introducing a liquid, hardenable salt molding material into the cavity via the filling opening, and at least partial hardening of the salt molding material introduced into the cavity to form a hollow body produced from hardened salt molding material, the hollow body having at least one hollow space of the casting core which is delimited by the hardened salt molding material. The hollow space of the casting core is closed on all sides by means of the salt molding material introduced into the cavity. A casting core is also provided.

1 .- 9 . (canceled) 
     
     
         10 . A method for the production of a casting core, the method comprising the steps of:
 preparing a mold which has at least one cavity and at least one filling opening which is fluidically connected to the cavity;   introducing a liquid, hardenable salt molding material into the cavity via the filling opening; and   at least partial hardening of the salt molding material introduced into the cavity to form a hollow body produced from hardened salt molding material, the hollow body having at least one hollow space of the casting core which is delimited by the hardened salt molding material, and   wherein the hollow space of the casting core is closed on all sides by means of the salt molding material introduced into the cavity.   
     
     
         11 . The method according to  claim 10 , wherein after the step of at least partial hardening, a still liquid first part of the salt molding material introduced into the cavity is led away from the hollow space via the filling opening and the hollow space is closed at least in the region of the filling opening by means of a still liquid second part of the salt molding material introduced into the cavity by hardening of the second part of the hollow space. 
     
     
         12 . The method according to  claim 11 , wherein a cross section of the filling opening is more than double the wall thickness of the hardened salt molding material which delimits the hollow space. 
     
     
         13 . The method according to  claim 10 , wherein after closing the hollow space, the casting core is moved around at least one axis, whereby a still liquid part of the salt molding material located in the hollow space is spread along the hollow body and hardened. 
     
     
         14 . The method according to  claim 10 , wherein at least one core mounting protruding from the hollow body is produced in a casting mold from the salt molding material and by means of the mold for mounting the casting core. 
     
     
         15 . The method according to  claim 14 , wherein the core mounting is formed to be solid at least in a partial region. 
     
     
         16 . The method according to  claim 10 , wherein the casting core is cast to be near-net-shape with a tolerance in a range from 0.1 to 0.5 millimeters, and is removed from the mold. 
     
     
         17 . The method according to  claim 10 , further comprising using of the produced casting core in a die casting method. 
     
     
         18 . The method according to  claim 17 , wherein the die casting method is an aluminum die casting method. 
     
     
         19 . The method according to  claim 10 , wherein the casting core is for metal casting. 
     
     
         20 . A casting core comprising:
 a hollow body formed of a salt molding material, the hollow body having at least one hollow space which is delimited by the hardened salt molding material, and   wherein the hollow space is closed on all sides by the hardened salt molding material.   
     
     
         21 . The casting core according to  claim 20 , wherein the casting core is used in a die casting method. 
     
     
         22 . The casting core according to  claim 21 , wherein the die casting method is an aluminum die casting method. 
     
     
         23 . The casting core according to  claim 20 , wherein the casting core is for metal casting.