Metal deforming – By extruding through orifice – By rotating impeller means
Reexamination Certificate
2005-03-29
2005-03-29
Tolan, Ed (Department: 3725)
Metal deforming
By extruding through orifice
By rotating impeller means
C072S020100, C072S263000
Reexamination Certificate
active
06871522
ABSTRACT:
A continuous extrusion machine has a chassis (1) supporting a wheel (2) for rotation by a motor. An endless groove (7) extends around the periphery of the wheel (2). A shoe (3) is mounted in the chassis (1) and has an enveloping surface shaped to closely envelop an arc of the wheel (2) periphery so that the groove (7) co-operates with the shoe (3) to form a passage. An abutment is mounted on the shoe (3) to extend into the passage at a downstream end. Tooling is mounted in the shoe (3) including a die such that a material such as aluminum or copper bar fed into the groove (7) is extruded through the die as a consequence of the energy transfer via friction from the rotating wheel (2). A gap (12) exists between the enveloping surface and the wheel (2). The gap (12) is used to provide the orifice of a sonic gap (12) sensor whereby the size of the gap (12) can be accurately and directly measured. The gap (12) size sensed is used to control the position of the shoe (3) in two directions mutually perpendicular to the rotary axis of the wheel (2) by adjusting support structures which support the shoe (3). The size and shape of the gap (12) can thus be safely adjusted while the machine is extruding allowing the size and shape of the gap (12) to be adjusted for optimum performance.
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Maddock Brian
Smith Martin James
Fay Sharpe Fagan Minnich & McKee LLP
Holton Machinery
Tolan Ed
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