Apparatus for performing foundry work

Abstract

A machine for forming and fitting core support pins into wax ( 70 ) surrounding a core ( 68 ) prior to covering the wax ( 70 ) with a frit ( 76 ), includes one or more punch devices ( 30 ), ( 82 ) within its structure, so as to enable the forming of one or more indentations in each pin, intermediate its ends, thereby providing a designed weakness in the pin to cause it to more reliably follow slight relative movement which occurs between the pins and the part being cast, thus reducing stresses in the surface of the part.

I Claim:  
     
         1 . A core locating pin which in operation spaces a wax covered core from a surrounding ceramic frit, by having one end buried in said frit, and the other end abutting said core, comprises a rod which includes an indentation intermediate its ends, said indentation being so positioned as to lie entirely within said frit, with one edge coinciding with the interior face thereof.  
     
     
         2 . A core location pin as claimed in  claim 1  wherein said rod has two opposing indentations intermediate its ends.  
     
     
         3 . A core locating pin forming and fitting machine comprising a cylindrical body containing a pressure actuated piston and rod, said rod having a first bore diametrically therethrough at a position adjacent its free end, which bore, in one position of said rod, and via a bore in the cylinder wall, receives pin wire from an external source, said rod having a second bore arranged normally thereto, and connecting said first bore with a space between the rod end and the end wall of the cylindrical body, which space contains a punch device which in operation passes through said second bore, and punches an indentation in pin wire, when it is loaded into in said first bore, prior to said pin wire, when in said first bore, being cut to form a pin of desired length by movement of said piston and rod relative to said cylindrical body, to a position wherein said first bore is aligned with a further, pin ejection bore in the wall of the cylindrical body.  
     
     
         4 . A core locating pin forming and fitting machine as claimed in  claim 3 , wherein said piston and rod are constructed from two attachable parts, said rod being axially bored to a depth equi-distant from said diametrical bore in said rod as is the end extremity thereof, said second bore is axially extended to said axial bore, and a further punch device is fitted therein so as to enable the simultaneous forming of opposing indentations in pin wire when loaded in said first bore.  
     
     
         5 . A core locating pin forming and fitting machine as claimed in  claim 3  wherein said punch device comprises a solenoid actuated rod.