Abstract: A coupling for a molten metal processing system to provide coupling for rotor/shaft systems which has a heat break to prevent heat flow to a motor. A cross sectional area reduction provides a restriction which reduces heat transmission through a conductive material to restrict heat flow to a motor, which will ultimately extend the life of the motor.

Abstract: A molten metal pump comprised of a metal base defining a pumping chamber is provided. The pump further includes a motor mount adapted to receive a motor, at least one metal post extending between the base and the motor mount, and a metal shaft disposed between the motor and an impeller disposed in the pumping chamber. A bearing ring engages the impeller. The pumping chamber will include an inlet and an outlet. A steel riser tube in fluid communication the outlet is also provided.

Abstract: A molten metal pump assembly (10) and method to fill complex molds with molten metal, such as aluminum. The pump assembly includes an elongated shaft (16) connecting a motor (14) to an impeller (22). The impeller is housed within a chamber (18) of a base member such that rotation of the impeller draws molten metal into the chamber at an inlet (48) and forces molten aluminum through an outlet (50). A first bearing (36) is adapted to support the rotation of the impeller at a first radial edge (32) and a second bearing (38) is adapted to support the rotation of the impeller at a second radial edge. A bypass gap (60) is interposed between the second bearing and the second radial edge. Molten metal leaks through the bypass gap at a predetermined rate to manipulate a flow rate and a head pressure of the molten metal such that precise control of the flow rate is achieved.

Abstract: A preheat charging system for preheating scrap metal prior to delivery to a melting furnace. The system includes a preheating station having a heating chamber adapted to receive scrap metal. Hot gas from a burner chamber is circulated around the scrap metal. The burner chamber is adapted to receive exhaust gas from a hot exhaust gas source such as a melting furnace. A burner apparatus is mounted within the burner chamber in a flow path of an exhaust inlet port. The burner is configured to supply supplemental heat on demand to the heating chamber to supplement the hot exhaust gas. A first fan can be provided to direct exhaust air from a furnace to the burner chamber. A second fan can be provided for directing air into the burner apparatus.

Abstract: This invention relates to the art of processing and treating molten metal. More particularly, this invention relates to a new and improved coupling design for a molten metal processing system to provide coupling design for rotor/shaft systems which has a heat break to prevent heat flow to a motor. This disclosure deals with a cross sectional area reduction heat break which provides a restriction prevent heat transmission through a conductive material by providing a coupling for connecting a motor to a shaft in a molten metal processing system to restrict heat flow to a motor, which will ultimately extend the life of the motor.

Abstract: A molten metal pump includes an impeller, a pump base housing at least partially enclosing the impeller, a shaft connected to the impeller, a motor connected to the shaft, a motor mount plate for supporting the motor; and a post for connecting the motor mount plate to the pump base housing. The molten metal pump can include a connector that connects the post to the motor mount plate. The molten metal pump can include a socket for connecting the shaft to the motor. The shaft can comprise an assembly including an elongated metal rod having a first end and a second end and a metal non-circular drive member attached at the second end of the elongated metal rod.