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US 6,318,986 B1Granted
Undercut split die
AssigneeStackpole Limited
InventorsGerd Hinzmann, Mark Haiko, Frank Ma, Allan Wilson, Keith Buckley-Golder, Robert Round
Life of this patent
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AssigneeStackpole Limited
InventorsGerd Hinzmann, Mark Haiko, Frank Ma, Allan Wilson, Keith Buckley-Golder, Robert Round
Estimating the term…
This invention relates to a device to compact parts with an undercut out of powder material having an upper die moveable relative a lower die, at least one upper punch associated with the upper die for relative movement therebetween, at least two lower punches associated with the lower die for relative movement therebetween, the lower punches defining a lower cavity with the lower die for filling with the powder material when the dies are in an open position, the upper die contacting the lower die in a closed position for movement of one of the lower punches towards the upper die so as to transfer the powder material towards the upper die and then to compact the powder material between the upper and lower punches with said dies in the closed position so as to produce the part; the dies moveable to an eject position for ejection of the compacted part.
A toolset for a powder molding machine comprising a pair of opposed die and punch sets each having a die and a punch co-operating therewith to define respective chambers, said sets being positionable relative to one another to provide a closed position in which said chambers are in closed communication to form a closed mold cavity, one of said sets having a pair of nested punches with said punches being movable relative to one another from a filling position to a compaction position, wherein movement of said punch between said filling and said compaction positions transfers powder between said chambers.
Dependencies are inferred from the claim text.