Method for producing a cooling channel piston and cooling channel piston produced by such a method
AssigneeMahle International GmbH
InventorUlrich Bischofberger
Life of this patent
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Abstract
A method for producing a cooling channel piston may include producing a salt core blank by pressing and sintering a pure salt material having a surface roughness Rz of at most 60 μm. The method may also include one of immersing the salt core blank into a saturated solution of the salt material, or spraying the salt core blank with a saturated solution of the salt material. The method may also include drying the salt core blank to form a salt core having a surface roughness Rz of at least 200 μm. The method may further include placing the salt core in a casting mold, and casting the cooling channel piston from a metallic casting material.
Claims20
A method for producing a cooling channel piston, comprising:
- producing a salt core blank by pressing and sintering a pure salt material having a surface roughness Rz of at most 60 μm;
- one of:
- immersing the salt core blank into a saturated solution of the salt material, or
- spraying the salt core blank with the saturated solution of the salt material;
- drying the salt core blank to form a salt core having a surface roughness Rz of at least 200 μm;
- placing the salt core in a casting mold;
- and
- casting a cooling channel piston from a metallic casting material.
A method for producing a cooling channel piston, comprising:
- producing a salt core blank by pressing and sintering a pure salt material having a surface roughness Rz of at most 60 μm;
- one of:
- immersing the salt core blank into one of a solvent and a solution of the salt material, or
- spraying the salt core blank with the one of a solvent and a solution of the salt material;
- sprinkling the salt core blank with a salt material having at least one of a defined grain size distribution and a defined grain diameter distribution;
- drying the salt core blank to form a salt core having a surface roughness Rz of at least 200 μm;
- placing the salt core in a casting mold;
- and
- casting a cooling channel piston from a metallic casting material.
A cooling channel piston produced by a process comprising:
- producing a salt core blank by pressing and sintering a pure salt material having a surface roughness Rz of at most 60 μm;
- one of:
- immersing the salt core blank into one of a solvent and a solution of the salt material, or
- spraying the salt core blank with the one of a solvent and a solution of the salt material;
- drying the salt core blank to form a salt core having a surface roughness Rz of at least 200 μm;
- placing the salt core in a casting mold;
- and
- casting the cooling channel piston from a metallic casting material.
A cooling channel piston comprising a circulating cooling channel accommodated in a piston head, wherein a surface of the cooling channel has a surface roughness Rz of at least 200 μm.
Dependencies are inferred from the claim text.