Lubricant blend and use of the same

Abstract

Novel lubricant mixtures suitable for external lubrication in interior high-pressure forming and their methods of use are disclosed.

What is claimed:  
     
         1 . A method for lubricating between a mould and a work piece to be formed under high pressure in the mould, comprising: 
 contacting the mould and the work piece with a lubricant mixture comprising: 
 from about 40% to about 99.6% by weight of the mixture of at least one oil which is liquid at room temperature; and  
 from about 0.4% to about 10% by weight of the mixture of at least one wax.  
   
     
     
         2 . The method of  claim 1 , wherein the lubricant mixture further comprises: 
 from about 1% to about 25% by weight of the mixture of at least one fatty acid ester.    
     
     
         3 . The method of  claim 1 , wherein the lubricant mixture further comprises: 
 from about 1% to about 25% by weight of the mixture of at least one lubricant additive.    
     
     
         4 . The method of  claim 2 , wherein the lubricant mixture further comprises: 
 from about 1% to about 25% by weight of the mixture of at least one lubricant additive.    
     
     
         5 . The method of  claim 4 , wherein the lubricant mixture comprises: 
 from about 40% to about 84.6% by weight of the mixture of oil; and    at least about 15% by weight of the mixture of at least one fatty acid ester, or at least one lubricant additive, or mixture thereof.    
     
     
         6 . The method of  claim 1  wherein the lubricant mixture further comprises up to about 5% by weight of water.  
     
     
         7 . The method of  claim 1 , wherein the lubricant mixture further comprises up to about 1% by weight of emulsifier.  
     
     
         8 . The method of  claim 7  wherein the emulsifier comprises up to about 0.1% by weight of the mixture.  
     
     
         9 . The method of  claim 5 , wherein the lubricant mixture comprises: 
 from about 50% to about 84.6% by weight of the mixture of at least one oil which is liquid at room temperature;    from about 5% to about 20% by weight of the mixture of at least one fatty acid ester; and    from about 5% to about 20% by weight of the mixture of at least one lubricant additive.    
     
     
         10 . The method of  claim 1 , wherein the lubricant mixture is a liquid at room temperature.  
     
     
         11 . The method of  claim 1 , wherein the lubricant mixture is in the form of a paste at room temperature.  
     
     
         12 . The method of  claim 1 , wherein the lubricant mixture is applied to the interior surface of the mould or to the exterior surface of the work piece by spraying, airless-spraying, dipping, roller application or brushing.  
     
     
         13 . The method of  claim 1 , wherein the high-pressure forming of said work piece is effected using a liquid, pressure medium.  
     
     
         14 . The method of  claim 13 , wherein the liquid is water based.  
     
     
         15 . The method of  claim 14 , wherein upon completion of the high-pressure forming process of the work piece, a phase separation between the lubricant mixture and the pressure medium occurs.  
     
     
         16 . The method of  claim 14 , wherein upon completion of the high-pressure forming process of the work piece, at least part of the lubricant mixture is removed from the work piece or the mould with a water-based cleaning medium.  
     
     
         17 . A lubricant mixture for use in high-pressure forming of a metal work piece in a mould, comprising: 
 from about 40% to about 99.6% by weight of the mixture of at least one oil which is liquid at room temperature; and    from about 0.4% to about 10% by weight of the mixture of at least one wax.    
     
     
         18 . A lubricant mixture of  claim 17  further comprising from about 1% to about 25% by weight of the mixture of at least one fatty acid ester.  
     
     
         19 . The lubricant mixture of  claim 17  further comprising from about 1% to about 25% by weight of the mixture of at least one lubricant additive.  
     
     
         20 . The lubricant mixture of  claim 18  further comprising from about 1% to about 25% by weight of the mixture of at least one lubricant additive.  
     
     
         21 . The lubricant mixture of  claim 20  wherein the fatty acid ester, or the lubricant additive, or mixture thereof comprise at least about 15% by weight of the lubricant mixture.