Cover die holder block for high-pressure die casting apparatus

Abstract

A cover die holder block for a high-pressure die casting apparatus includes: a first cover die holder block component having defined therein at least a portion of a cover die holder block pocket surface configured to accommodate at least one die insert defining a mold surface, and at least portions of two opposing lock faces adjacent the cover die holder block pocket surface; and a second cover die holder block component, the second cover die holder block component having two projections extending therefrom, each projection being accommodated in a corresponding recess defined in the first cover die holder block component behind a respective lock face, in a direction of largest stress applied to the lock face during operation. The first and second cover die holder block components are separately fabricated and are connected to yield the cover die holder block.

What is claimed is: 
     
         1 . A cover die holder block for a high-pressure die casting apparatus, the cover die holder block comprising:
 a first cover die holder block component having defined therein
 at least a portion of a cover die holder block pocket surface configured to accommodate at least one die insert defining a mold surface, and 
 at least portions of two opposing lock faces adjacent the cover die holder block pocket surface; and 
   a second cover die holder block component, the second cover die holder block component having two projections extending therefrom, each projection being accommodated in a corresponding recess defined in the first cover die holder block component behind a respective lock face, in a direction of largest stress applied to the lock face during operation,   the first and second cover die holder block components being separately fabricated and being connected to yield the cover die holder block.   
     
     
         2 . The cover die holder block of  claim 1 , wherein each of the first cover die holder block component and the second cover die holder block component is fabricated from a respective, single piece of material. 
     
     
         3 . The cover die holder block of  claim 1 , wherein the first cover die holder block component and the second cover die holder block component are connected by bolts. 
     
     
         4 . The cover die holder block of  claim 3 , wherein at least one of the bolts comprises a multi-jackbolt tensioner. 
     
     
         5 . The cover die holder block of  claim 3 , wherein at least one of the bolts extends through the projection and the recess. 
     
     
         6 . The cover die holder block of  claim 1 , wherein the second cover die holder block component has defined therein:
 an additional portion of the cover die holder block pocket surface.   
     
     
         7 . The cover die holder block of  claim 1 , wherein the second cover die holder block component has defined therein:
 additional portions of the two opposing lock faces.   
     
     
         8 . The cover die holder block of  claim 1 , wherein each said portion of the lock face defined in the first cover die holder block component comprises greater than 50 percent of a total area of the lock face. 
     
     
         9 . The cover die holder block of  claim 1 , wherein each said portion of the lock face defined in the first cover die holder block component comprises greater than 60 percent of a total area of the lock face. 
     
     
         10 . The cover die holder block of  claim 1 , wherein each said portion of the lock face defined in the first cover die holder block component comprises greater than 70 percent of a total area of the lock face. 
     
     
         11 . The cover die holder block of  claim 1 , wherein each said portion of the lock face defined in the first cover die holder block component comprises greater than 80 percent of a total area of the lock face. 
     
     
         12 . A cover die holder block for a high-pressure die casting apparatus, the cover die holder block comprising:
 a first cover die holder block component having defined therein
 at least a portion of a cover die holder block pocket surface configured to accommodate at least one die insert defining a mold surface, one or more surfaces of said at least a portion of the cover die holder block pocket surface facing a parting plane of the cover die holder block, and 
 at least portions of two opposing lock faces adjacent the cover die holder block pocket surface; and 
   a second cover die holder block component,   the first and second cover die holder block components being separately fabricated and being connected to yield the cover die holder block.   
     
     
         13 . The cover die holder block of  claim 12 , wherein each of the first cover die holder block component and the second cover die holder block component is fabricated from a respective, single piece of material. 
     
     
         14 . The cover die holder block of  claim 12 , wherein the first cover die holder block component and the second cover die holder block component are connected by bolts. 
     
     
         15 . The cover die holder block of  claim 14 , wherein at least one of the bolts comprises a multi-jackbolt tensioner. 
     
     
         16 . The cover die holder block of  claim 12 , wherein the first cover die holder block component comprises a recess that is shaped to receive a projection extending from the second cover die holder block component. 
     
     
         17 . The cover die holder block of  claim 16 , wherein the projection and recess are located behind the lock face in a direction of largest stress applied to the lock face during operation. 
     
     
         18 . The cover die holder block of  claim 12 , wherein the second cover die holder block component has defined therein:
 an additional portion of the cover die holder block pocket surface.   
     
     
         19 . The cover die holder block of  claim 12 , wherein the second cover die holder block component has defined therein:
 additional portions of the two opposing lock faces.   
     
     
         20 . The cover die holder block of  claim 12 , wherein each said portion of the lock face defined in the first cover die holder block component comprises greater than 60 percent of a total area of the lock face.