Co-casting precious metal to an alternative material

Abstract

A Co-Casting technique is described herein using Pins, Undercuts, Grooves, Rails that permit the attachment of a secondary precious metal to a primary alternative meta. The process of making a mold creating a model and casting a final worked piece uses wax filling of the recessed areas and the subsequent molding of the precious metal within the recessed areas in order to fill the aforementioned.

What is claimed is: 
     
         1 . A co-casting method comprising the steps of:
 creating an original design having a unique criteria with a recessed area connecting a pattern in the original design.   
     
     
         2 . The co-casting method of  claim 1 , wherein the pattern has a minimum depth of 0.5 mm. 
     
     
         3 . The co-casting method of  claim 1 , further comprising:
 ensuring the unique criteria enables a secondary metal adheres to a primary alternative metal.   
     
     
         4 . The co-casting method of  claim 3 , wherein the pattern includes a side wall with an undercut to permit attachment of a secondary material. 
     
     
         5 . The co-casting method of  claim 1 , further comprising:
 making the original design into a mold.   
     
     
         6 . The co-casting method of  claim 5 , further comprising:
 creating a model using a metal and a pattern therein; and   coating the pattern with wax filling.   
     
     
         7 . The co-casting method of  claim 6 , further comprising:
 placing the model in an investment sprue.   
     
     
         8 . The co-casting method of  claim 7 , further comprising:
 casting the model with a secondary metal.   
     
     
         9 . The co-casting method of  claim 8 , further comprising:
 removing the model from the investment sprue and immediately molding it with both metals together.   
     
     
         10 . The co-casting method of  claim 9 , further comprising:
 cleaning and completing the model.   
     
     
         11 . A Co-Casting method comprising the steps of:
 creating a primary mold model having a plurality of recessed areas therein;   filling the plurality of recessed areas in the primary mold model with a wax for secondary casting; and   molding a precious metal in the recessed areas and repeating the process.   
     
     
         12 . The Co-Casting method of  claim 11 , wherein the recessed area is from a group comprising of: a ridge, an undercut, a pin, and a rail. 
     
     
         13 . A co-casting process comprising the steps of:
 providing a part with a depression throughout an outside wall;   molding a primary model is molded;   filling the primary model with wax for secondary casting; and   completing a co-cast as the metals are molded together such that the primary model is placed inside for secondary wax injection to repeat process.