Spruing assembly

Abstract

An improved spruing assembly utilized in the investment process in the making of investment mold castings. The spruing assembly comprising a base unit engaged to a casting ring to define a receptacle for receiving investment material, and a sprue holding member connecting to the base unit within said receptacle and supporting thereon one or more sprues for holding a wax structure formed in a pattern to be cast. The sprue having a first end connecting to the wax structure and a curved adapter disposed at the second end for quick locking onto the sprue holding member.

1 . In a spruing assembly comprising: 
 a runner bar for connecting to a base unit surrounded by a casting ring;    at least one sprue connected at a second end to the runner bar, said sprue having an opposed first end for connecting to at least one wax structure formed in a pattern to be cast, the improvement comprising:    a curved adapter disposed at the second end of the sprue, said adapter being sized and shaped to lock onto said runner bar in a secure engagement.    
   
   
       2 . The spruing assembly as described in  claim 1  wherein the adapter has a radius of a first predetermined length, and the runner bar has a radius of a second predetermined length which is longer than the first predetermined length.  
   
   
       3 . The spruing assembly as described in  claim 1  wherein said sprue has a reservoir formed thereon.  
   
   
       4 . The spruing assembly as described in  claim 1  wherein at least the first end of said sprue is hollow.  
   
   
       5 . In a spruing assembly comprising: 
 a base unit removeably engaged to a casting ring to define a receptacle for receiving investment material for the making of castings; a sprue holding member connected to the base unit inside said receptacle; said improvement comprising:    at least one wax structure formed in a pattern to be cast;    at least one sprue having a first end and a second end, said first end connected to the wax structure; and,    a curved adapter disposed at the second end of the sprue, said adapter of the second end connected to said sprue holding member; said adapter being sized and shaped to lock onto said sprue holding member in a secure engagement.    
   
   
       6 . The spruing assembly as described in  claim 5  wherein the adapter has a radius of a first predetermined length, and the sprue holding member has a radius of a second predetermined length which is longer than the first predetermined length.  
   
   
       7 . The spruing assembly as described in  claim 6  wherein the sprue holding member is a single elongated runner bar having an arcuate cross-section.  
   
   
       8 . The spruing assembly as described in  claim 6  wherein the sprue holding member is a runner bar formed in the shape of a ring having a central plug and a plurality of radial bars extending from the central plug and connected to the ring, said central plug is connected to said base unit, said runner bar has an arcuate cross-section.  
   
   
       9 . The spruing assembly as described in  claim 5  wherein said sprue has a reservoir formed thereon.  
   
   
       10 . The spruing assembly as described in  claim 5  wherein at least the first end of said sprue is hollow.  
   
   
       11 . In a spruing assembly comprising: 
 a base unit removeably engaged to a casting ring to define a receptacle for receiving investment material for the making of castings; a sprue holding member connected to the base unit inside said receptacle; said improvement comprising:    at multi-unit wax structure formed in a pattern to be cast;    each unit of said multi-unit wax structure having a sprue connected thereto, each sprue having a first end and a second end, said first end connected to the corresponding unit of said multi-unit wax structure; and,    a curved adapter disposed at the second end of each sprue, each adapter of each second end connected to said sprue holding member; each adapter being sized and shaped to cover at least half of the circumference of the sprue holding member in locking onto said sprue holding member in a secure engagement.    
   
   
       12 . The spruing assembly as described in  claim 11  wherein each adapter has a radius of a first predetermined length, and the sprue holding member has a radius of a second predetermined length which is longer than the first predetermined length.  
   
   
       13 . The spruing assembly as described in  claim 12  wherein the sprue holding member is a single elongated runner bar having an arcuate cross-section.  
   
   
       14 . The spruing assembly as described in  claim 12  wherein the sprue holding member is a runner bar formed in the shape of a ring having a central plug and a plurality of radial bars extending from the central plug and connected to the ring, said central plug is connected to said base unit, said runner bar has an arcuate cross-section.  
   
   
       15 . The spruing assembly as described in  claim 11  wherein each sprue has a reservoir formed thereon.  
   
   
       16 . The spruing assembly as described in  claim 11  wherein at least the first end of each sprue is hollow.