Title:
CASTING METHOD AND DIE CASTING MACHINE
Document Type and Number:
WIPO Patent Application WO/2008/088064
Kind Code:
A1
Abstract:
This invention provides a casting method utilizing a high level of vacuum, which can
shorten injection time and can produce high-quality castings. The casting method
comprises a low-speed injection step of pouring a molten metal (15) into a plunger
sleeve (6) and then moving a plunger (3) at a low speed to forcibly feed the molten
metal, a high-speed injection step of, after the low-speed injection step, moving
the plunger at a high speed to inject the molten metal at a high speed into a cavity
(12) within a mold (8, 9), a vacuum suction step of evacuating the cavity through
a vacuum valve (13), and a pressure holding step of, after the completion of the
high-speed injection step, further pressurizing the molten metal to maintain the
molten metal in a pressurized state. In the vacuum suction step, when a plunger chip
(5) has closed the pouring port, the vacuum suction is started, and, immediately after
the degree of vacuum within the cavity (12) reaches a contemplated value, the
step is transferred to the high-speed injection step.
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Inventors:
UCHIDA TADASHI (JP)
Application Number:
PCT/JP2008/050668
Publication Date:
July 24, 2008
Filing Date:
January 15, 2008
Export Citation:
Assignee:
UBE MACHINERY CORP LTD (JP)
UCHIDA TADASHI (JP)
UCHIDA TADASHI (JP)
International Classes:
B22D17/32; B22D17/14
Foreign References:
| JP2004337932A | 2004-12-02 | |||
| JP2004298876A | 2004-10-28 | |||
| JPH0768366A | 1995-03-14 | |||
| JPH03210955A | 1991-09-13 | |||
| JP2649726B2 | 1997-09-03 | |||
| JPS642469B2 | 1989-01-17 |
Attorney, Agent or Firm:
AOKI, Atsushi et al. (Toranomon 37 Mori Bldg.5-1, Toranomon 3-chom, Minato-ku Tokyo, JP)
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