Machine for casting objects composed of separated different metals autogenously joined

Claim 2

Apparatus for forming similar centrifugal castings comprising in combination a station for metering predetermined amounts of molten metal to molds, means for presenting molds seriatim to the station including a shiftable support member, a plurality of mold holders on the support member, each holder being mounted on bearings for rotary motion, and each holder having an opening extending vertically therethrough whereby metal metered from the station may flow through the opening if no mold is positioned on the holder.

Claim 3

Apparatus for casting T-shaped engine valves each having a peripheral seat portion formed exclusively of a first metal and a head portion formed exclusively of a second and different metal, characterized by a first source of molten first metal, a second source of molten second and different metal, means for holding the temperature of the second metal above the melting temperature of the first metal, a support for a valve mold adapted to present the mold successively to the two sources, means for pouring the first metal into the mold when it is presented to the first source, means for rotating the mold on the support to hold the first molten metal in the peripheral seat portion of the mold, means for moving the support through a cooling environment to present the mold to the second source after the first metal has been poured, means for pouring molten second metal onto the first metal in the mold while the mold is rotating, a single cam shaft having fixed thereto a plurality of cams, a pulsator actuated by each cam and forming part of a hydraulic link having a follower, the individual followers being connected to operate the support moving means, the mold rotating means, and the metal pouring means, and means for rotating the cam shaft to actuate and time the moving of the support, the rotation of the mold, and the pouring of the metals to solidify metal on the exposed surface of the first metal before the second metal is poured to form a barrier on the still molten first metal at a temperature below the temperature of the second metal, which barrier prevents second metal from mixing with first molten metal beyond the barrier, the apparatus bEing adapted to solidify the two metals simultaneously to produce a valve having a peripheral seat portion composed entirely of first metal autogenously united to a head portion composed entirely of second metal by a joint determined by molting of the barrier by the second metal.

Claim 4

Apparatus for casting T-shaped engine valves each having a peripheral seat portion formed exclusively of a first metal and a head portion formed exclusively of a second and different metal, characterized by a first source of molten first metal, a second source of molten second and different metal, means for holding the temperature of the second metal above the melting temperature of the first metal, a support for a valve mold adapted to present the mold successively to the two sources, means for pouring the first metal into the mold when it is presented to the first source, means for rotating the mold on the support to hold the first molten metal in the peripheral seat portion of the mold, means for moving the support through a cooling environment to present the mold to the second source after the first metal has been poured, means for pouring molten second metal onto the first metal in the mold while the mold is rotating, a single cam shaft having fixed thereto a plurality of cams, a pulsator actuated by each cam and forming part of a hydraulic link having a follower, the individual followers being connected to operate the support moving means, the mold rotating means, and the metal pouring means, and means for rotating the cam shaft to actuate and time the moving of the support, the rotation of the mold, and the pouring of the metals to solidify metal on the exposed surface of the first metal before the second metal is poured to form a barrier on the still molten first metal at a temperature below the temperature of the second metal, which barrier prevents second metal from mixing with first molten metal beyond the barrier, the apparatus bEing adapted to solidify the two metals simultaneously to produce a valve having a peripheral seat portion composed entirely of first metal autogenously united to a head portion composed entirely of second metal by a joint determined by molting of the barrier by the second metal.

Claim 5

Apparatus for casting T-shaped engine valves each having a peripheral seat portion formed exclusively of a first metal and a head portion formed exclusively of a second and different metal, characterized by a first source of molten first metal, a second source of molten second and different metal, means for holding the temperature of the second metal above the melting temperature of the first metal, a support for a valve mold adapted to present the mold progressively to the two sources, means for pouring first metal into the mold when it is presented to the first source, means for rotating the mold on the support to hold the first molten metal in the peripheral seat portion of the mold, means for moving the support through a cooling environment to present the mold to the second source after the first metal has been poured, means for pouring molten second metal onto the first metal in the mold, while the mold is rotating, and control means for timing the moving of the support and the pouring of the metals to solidify metal on the exposed surface of the first metal before the second metal is poured to form a barrier on still molten first metal at a temperature below the temperature of the second metal, which barrier prevents second metal from mixing with first molten metal beyond the barrier, the apparatus being adapted to solidify the two metals simultaneously to produce a valve having a peripheral seat portion composed entirely of a first metal autogenously joined to a head portion composed entirely of second metal by a joint determined by melting of the barrier by the second metal.

Claim 6

Apparatus for casting T-shaped engine valves each having a peripheral seat portion formed exclusively of a first metal and a head portion formed exclusively of a second and different metal, characterized by a first source of molten first metal, a second source of molten second and different metal, means for holding the temperature of the second metal above the melting temperature of the first metal, a support for a valve mold adapted to present the mold progressively to the two sources, means for pouring first metal into the mold when it is presented to the first source, means for rotating the mold on the support to hold the first molten metal in the peripheral seat portion of the mold, means for moving the support through a cooling environment to present the mold to the second source after the first metal has been poured, means for pouring molten second metal onto the first metal in the mold, while the mold is rotating, and control means for timing the moving of the support and the pouring of the metals to solidify metal on the exposed surface of the first metal before the second metal is poured to form a barrier on still molten first metal at a temperature below the temperature of the second metal, which barrier prevents second metal from mixing with first molten metal beyond the barrier, the apparatus being adapted to solidify the two metals simultaneously to produce a valve having a peripheral seat portion composed entirely of a first metal autogenously joined to a head portion composed entirely of second metal by a joint determined by melting of the barrier by the second metal.

Claim 7

Apparatus for casting T-shaped engine valves each having a flanged head including a portion formed exclusively of one metal and a stem portion formed exclusively of another and different metal characterized by a first source of molten one metal, a second source of molten other and different metal, means for holding the temperature of the other metal above the melting temperature of the one metal, a support for a valve mold adapted to present the mold successively to the two sources, means for pouring the one metal into the mold when it is presented to the first source, means for rotating the mold on the support to fill the head portion of the mold, means for moving the support through a cooling environment to present the mold to the second source after the one metal has been poured, means for pouring molten other metal onto the one metal in the mold while the mold is rotating, and control means for timing the moving of the support, the rotating of the mold and the pouring of the metal to solidify the one metal on the exposed surface of the one metal before the other metal is poured to form a barrier on still molten one metal at a temperature below the temperature of the other metal, which barrier prevents the other metal from mixing with the one molten metal beyond the barrier, the apparatus being adapted to solidify the two metals simultaneously to produce a valve having a head portion composed entirely of one metal autogenously united to a stem portion composed entirely of the other metal by a joint determined by the melting of the barrier by the other metal.

Claim 8

Apparatus for casting T-shaped engine valves each having a flanged head including a portion formed exclusively of one metal and a stem portion formed exclusively of another and different metal characterized by a first source of molten one metal, a second source of molten other and different metal, means for holding the temperature of the other metal above the melting temperature of the one metal, a support for a valve mold adapted to present the mold successively to the two sources, means for pouring the one metal into the mold when it is presented to the first source, means for rotating the mold on the support to fill the head portion of the mold, means for moving the support through a cooling environment to present the mold to the second source after the one metal has been poured, means for pouring molten other metal onto the one metal in the mold while the mold is rotating, and control means for timing the moving of the support, the rotating of the mold and the pouring of the metal to solidify the one metal on the exposed surface of the one metal before the other metal is poured to form a barrier on still molten one metal at a temperature below the temperature of the other metal, which barrier prevents the other metal from mixing with the one molten metal beyond the barrier, the apparatus being adapted to solidify the two metals simultaneously to produce a valve having a head portion composed entirely of one metal autogenously united to a stem portion composed entirely of the other metal by a joint determined by the melting of the barrier by the other metal.

Claim 9

Apparatus for casting T-shaped engine valves having a peripheral seat portion formed exclusively of a first metal, and intermediate part including a head portion formed exclusively of a second and different metal and a stem portion formed exclusively of a third and different metal, characterized by a first source of molten first metal, a second source of molten second and different metal, a third source of third and different metal, means for holding the temperature of the second metal above the melting temperature of the first metal, means for holding the temperature of the third metal above the melting temperature of the second metal, a support for a valve mold adapted to present the mold successively to the three sources, means for pouring first metal into the mold when it is presented to the first source, means for rotating the mold on the support to hold the first molten metal in the peripheral seat portion of the mold, means for moving the support through a cooling environment to present the mold to the second source after the first metal has been poured, means for pouring molten second metal onto the first metal in the mold while the mold is rotating, means for moving the support to present the mold to the third source after the second metal has been poured, means for pouring molten third metal onto the second metal in the mold, and control means for timing the moving of the support, the rotating of the mold and the pouring of the metals to solidify metal on the exposed surface of the first metal before the second metal is poured to form a barrier on still molten first metal at a temperature below the temperature of the second metal which barrier prevents second metal from mixing with first molten metal beyond the barrier, and to solidify second metal on the exposed surface of the second metal before the third metal is poured to form a barrier on still molten second metal at a temperature below the temperature of the third metal which barrier prevents the third metal from mixing with the second molten metal beyond the barrier, the apparatus being adapted to cool the three metals simultaneously to produce a valve having a peripheral seat portion composed entirely of a first metal autogenously united to an intermediate part composed entirely of second metal by a joint determined by melting the barrier of the first metal by the second metal and a stem composed entirely of a third metal joined to the second metal by a joint determined by melting of the barrier on the second metal by the third metal.

Claim 10

Apparatus for casting T-shaped engine valves having a peripheral seat portion formed exclusively of a first metal, and intermediate part including a head portion formed exclusively of a second and different metal and a stem portion formed exclusively of a third and different metal, characterized by a first source of molten first metal, a second source of molten second and different metal, a third source of third and different metal, means for holding the temperature of the second metal above the melting temperature of the first metal, means for holding the temperature of the third metal above the melting temperature of the second metal, a support for a valve mold adapted to present the mold successively to the three sources, means for pouring first metal into the mold when it is presented to the first source, means for rotating the mold on the support to hold the first molten metal in the peripheral seat portion of the mold, means for moving the support through a cooling environment to present the mold to the second source after the first metal has been poured, means for pouring molten second metal onto the first metal in the mold while the mold is rotating, means for moving the support to present the mold to the third source after the second metal has been poured, means for pouring molten third metal onto the second metal in the mold, and control means for timing the moving of the support, the rotating of the mold and the pouring of the metals to solidify metal on the exposed surface of the first metal before the second metal is poured to form a barrier on still molten first metal at a temperature below the temperature of the second metal which barrier prevents second metal from mixing with first molten metal beyond the barrier, and to solidify second metal on the exposed surface of the second metal before the third metal is poured to form a barrier on still molten second metal at a temperature below the temperature of the third metal which barrier prevents the third metal from mixing with the second molten metal beyond the barrier, the apparatus being adapted to cool the three metals simultaneously to produce a valve having a peripheral seat portion composed entirely of a first metal autogenously united to an intermediate part composed entirely of second metal by a joint determined by melting the barrier of the first metal by the second metal and a stem composed entirely of a third metal joined to the second metal by a joint determined by melting of the barrier on the second metal by the third metal.

Claim 11

Apparatus for casting a generally T-shaped object having an outer portion formed exclusively of a first metal and an inner portion within the outer portion formed exclusively of a second and different metal, characterized by a first source of molten first metal, a second source of molten second and different metal, means for holding the temperature of the second metal above the melting temperature of the first metal, a support for a valve mold adapted to present the mold successively to the two sources, means for pouring the first metal into the mold when it is presented to the first source, means for rotating the mold on the support to hold the first molten metal in the outer portion of the mold, means for moving the support to present the mold to the second source after the first metal has been poured, means for pouring molten second metal onto the first metal in the mold while the mold is rotating, and control means for timing the moving of the support, the rotating of the mold, and the pouring of the metals to solidify metal on an exposed surface of the first metal before the second metal is poured to form a barrier on still molten first metal at a temperature below the temperature of the second metal which barrier prevents second metal from mixing with first metal beyond the barrier, the apparatus being adapted to solidify the two metals simultaneously to produce an object having an outer portion composed entirely of first metal autogenously joined to an inner portion formed entirely of second metal by a joint determined by the melting of the barrier by the second metal.

Claim 12

Apparatus for casting a generally T-shaped object having an outer portion formed exclusively of a first metal and an inner portion within the outer portion formed exclusively of a second and different metal, characterized by a first source of molten first metal, a second source of molten second and different metal, means for holding the temperature of the second metal above the melting temperature of the first metal, a support for a valve mold adapted to present the mold successively to the two sources, means for pouring the first metal into the mold when it is presented to the first source, means for rotating the mold on the support to hold the first molten metal in the outer portion of the mold, means for moving the support to present the mold to the second source after the first metal has been poured, means for pouring molten second metal onto the first metal in the mold while the mold is rotating, and control means for timing the moving of the support, the rotating of the mold, and the pouring of the metals to solidify metal on an exposed surface of the first metal before the second metal is poured to form a barrier on still molten first metal at a temperature below the temperature of the second metal which barrier prevents second metal from mixing with first metal beyond the barrier, the apparatus being adapted to solidify the two metals simultaneously to produce an object having an outer portion composed entirely of first metal autogenously joined to an inner portion formed entirely of second metal by a joint determined by the melting of the barrier by the second metal.