Controlled pressure casting

Details Controlled pressure casting Controlled pressure casting

2006-05-19

2010-10-05

Kerns, Kevin P (Department: 1793)

Metal founding

Process

Shaping liquid metal against a forming surface

C164S112000, C164S120000

Reexamination Certificate

active

07806162

ABSTRACT:
A method of forming metal castings includes positioning a first end of a structural member in a first mold cavity and a second end of the structural member in a second mold cavity. The first and second mold cavities are fluidly coupled to a reservoir of molten metal. A main pressure is applied to the molten metal in the reservoir to force the molten metal into the first and second mold cavities. First and second auxiliary pressures are applied to the first and second mold cavities to densify the castings formed in the first and second mold cavities. Another method for casting includes maintaining a main pressure at or less than an initial, mold-filling pressure after the first and second mold cavities have been filled. Additionally, a method for detecting whether a first mold cavity is sufficiently filled with molten metal includes monitoring a moveable element.

REFERENCES:
patent: 3664410 (1972-05-01), Groteke
patent: 4779666 (1988-10-01), Ruhlandt et al.
patent: 5433262 (1995-07-01), Kawaguchi et al.
patent: 1288928 (1991-09-01), None
patent: 2174302 (1996-11-01), None
patent: 0318 655 (1989-06-01), None
patent: WO 96/22851 (1996-08-01), None
patent: WO 2005/042188 (2005-05-01), None

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