Metal founding – Process – Shaping liquid metal against a forming surface
Reexamination Certificate
2005-07-05
2005-07-05
Dunn, Tom (Department: 1725)
Metal founding
Process
Shaping liquid metal against a forming surface
C164S312000, C164S133000, C164S137000
Reexamination Certificate
active
06913062
ABSTRACT:
A fiber reinforced porous preform is positioned within a die cavity defined by upper and lower die members, and the lower die member defines at least one gate opening in the center portion of a water cooled shot sleeve which receives a vertically moveable shot piston. The area of the gate opening is small relative to the area of the shot sleeve, and the lower die member defines an annular recess above the inner surface of the shot sleeve for entrapping a shell of pre-solidified metal. Air vent slots extend outwardly between the shot sleeve and lower die member and are closed by the shell of pre-solidified metal. In one embodiment, the shot sleeve and shot piston are non-circular or oval in cross-section; and the lower die member has a plurality of longitudinally space gate openings.
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Kamm Richard J.
Loughman Michael J.
Swarts Ronald P.
Dunn Tom
Jacox Meckstroth & Jenkins
Lin I.-H.
THT Presses Inc.
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