Metal founding – Means to shape metallic material – Pressure shaping means
Reexamination Certificate
2007-05-01
2007-05-01
Lin, Kuang Y. (Department: 1725)
Metal founding
Means to shape metallic material
Pressure shaping means
C164S347000
Reexamination Certificate
active
10887906
ABSTRACT:
A die casting machine capable of reducing the pressure in a die cavity to a lower level such as a substantially perfect vacuum, having a movable die and a fixed die, a vacuum pump for reducing pressure in a cavity formed between the dies, and an injection apparatus for injecting and filling molten metal into the cavity with reduced pressure, at least one of the dies having an evacuation path connected with the vacuum pump and communicated with the cavity, a valve element for opening and shutting the evacuation path, and an electromagnetic driving means for making the valve element move linearly in the opening and shutting direction by electromagnetic force.
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Lin Kuang Y.
Pillsbury Winthrop Shaw & Pittman LLP
Toshiba Kikai Kabushiki Kaisha
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