Permanent casting die with ceramic lining

Abstract

In a permanent casting die with an at least local ceramic lining, the ceramic lining at least partially forms surface contours of a die cavity. The ceramic lining is applied in a form-fitting manner to a metallic core and the ceramic lining with the core is anchored firmly or movably in the die cavity.

What is claimed is:  
     
         1 . A permanent casting die, comprising: 
 a core;    a ceramic lining configured to at least partially provide surface contours of a die cavity, the ceramic lining applied form-fittingly to the core, the ceramic lining and the core anchored one of firmly and movably in the die cavity.    
     
     
         2 . The permanent casting die according to  claim 1 , wherein an expansion coefficient of the core and an expansion coefficient of the ceramic lining differ by a maximum of 5×10 −6  K −1 .  
     
     
         3 . The permanent casting die according to  claim 1 , wherein a composition of the ceramic lining is based on silicon nitride and a composition of the metallic core is based on molybdenum.  
     
     
         4 . The permanent casting die according to  claim 1 , wherein the core and the ceramic lining form a mandrel.  
     
     
         5 . The permanent casting die according to  claim 1 , wherein the casting die is arranged as a pressure die-casting die.  
     
     
         6 . The permanent casting die according to  claim 5 , wherein the pressure die-casting die is configured to produce a cylinder/crankcase.  
     
     
         7 . The permanent casting die according to  claim 1 , wherein the core includes one of an undulating and fluted surface, the ceramic lining anchored to the one of the undulating and fluted surface.  
     
     
         8 . The permanent casting die according to  claim 1 , wherein the core is approximately cylindrical and includes a cone, the ceramic lining including a negative of the core.  
     
     
         9 . The permanent casting die according to  claim 1 , further comprising a thermally conductive paste arranged at an interface between the ceramic lining and the core.  
     
     
         10 . A method of producing a ceramic lining of a permanent casting die including a core and a ceramic lining configured to at least partially provide surface contours of a die cavity, the ceramic lining applied form-fittingly to the core, the ceramic lining and the core anchored one of firmly and movably in the die cavity, comprising: 
 applying a raw ceramic compound to a metallic core;    subjecting the raw ceramic compound and the core to heat treatment to solidify the ceramic;    forming a firm connection between the ceramic and the core; and    finish machining a surface of the connection.    
     
     
         11 . A method of producing a ceramic lining of a permanent casting die including a core and a ceramic lining configured to at least partially provide surface contours of a die cavity, the ceramic lining applied form-fittingly to the core, the ceramic lining and the core anchored one of firmly and movably in the die cavity, comprising: 
 applying the ceramic lining to the core by a ceramic coating method.