Title:
CASTING METHOD, UPPER MOLD ASSEMBLY, AND METHOD FOR FIXING CORE TO THE UPPER MOLD
Document Type and Number:
WIPO Patent Application WO/2008/068947
Kind Code:
A1
Abstract:
This invention provides a casting method characterized by comprising the step of
fixing a core to an upper mold to provide an upper mold assembly, the step of pouring a
minimized amount of molten metal necessary for providing a cast product into a
concave in a lower mold, the step of moving the upper mold assembly at a predetermined first
speed and lowering the upper mold assembly to a predetermined height just above
the surface of the molten metal in the concave, the step of varying the lowering speed
of the upper mold assembly from the first speed to the predetermined second speed
to further lowering the upper mold assembly from the predetermined height, the
step of detecting information about the state of the upper mold assembly in such
a state that the upper mold assembly has been superimposed on or lowered toward the
lower mold, and the step of stopping of the lowering of the upper mold assembly after
the detection that the state information has reached predetermined state information.
The core is fixed to the upper mold depending upon a frictional fitting relationship
between mechanical means, an adhesive, and a core-side fitting protrusion and
the concave fitting part, or the engagement relationship between a core-side
engaging projection and molding sand to be tamped down.
Inventors:
HASHIMOTO KUNIHIRO (JP)
IWASAKI JUNICHI (JP)
HAGATA YUTAKA (JP)
KAMASAKA TAKESHI (JP)
IWASAKI JUNICHI (JP)
HAGATA YUTAKA (JP)
KAMASAKA TAKESHI (JP)
Application Number:
PCT/JP2007/068855
Publication Date:
June 12, 2008
Filing Date:
September 27, 2007
Export Citation:
Assignee:
SINTOKOGIO LTD (JP)
AISIN TAKAOKA LTD (JP)
HASHIMOTO KUNIHIRO (JP)
IWASAKI JUNICHI (JP)
HAGATA YUTAKA (JP)
KAMASAKA TAKESHI (JP)
AISIN TAKAOKA LTD (JP)
HASHIMOTO KUNIHIRO (JP)
IWASAKI JUNICHI (JP)
HAGATA YUTAKA (JP)
KAMASAKA TAKESHI (JP)
International Classes:
B22D23/00; B22C9/02; B22D18/02
Foreign References:
| JPH04300062A | 1992-10-23 | |||
| JP2003080346A | 2003-03-18 | |||
| JPH0871699A | 1996-03-19 | |||
| JPH0318457A | 1991-01-28 | |||
| JPH07256393A | 1995-10-09 | |||
| JPS63101046A | 1988-05-06 |
Attorney, Agent or Firm:
ASAMURA, Kiyoshi et al. (New Ohtemachi Bldg.2-1, Ohtemachi 2-chom, Chiyoda-ku Tokyo 04, JP)
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