JPS564367A - Metal flask for vacuum casting - Google Patents
Metal flask for vacuum castingInfo
- Publication number
- JPS564367A JPS564367A JP7816479A JP7816479A JPS564367A JP S564367 A JPS564367 A JP S564367A JP 7816479 A JP7816479 A JP 7816479A JP 7816479 A JP7816479 A JP 7816479A JP S564367 A JPS564367 A JP S564367A
- Authority
- JP
- Japan
- Prior art keywords
- vacuum
- metal flask
- maintained
- spring
- check valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
PURPOSE: To maintain the degree of vacuum in the metal flask constant by providing a check valve and an auxiliary suction device which makes use of elastic material to the connection part between the metal flask for vacuum casting and a vacuum suction pipe.
CONSTITUTION: Even if there is slight leakage of vacuum after vacuum suction, the specified degree of vacuum is maintained. For example, a check valve 9 and auxiliary suction device 1 are provided to the connection part 3 between a metal flask 2 and flexible hose 8. When air is sucked by a vacuum pump, the valve 13 which is energized to a suction hole 12 by a spring 14 is lifted and the air in the metal flask 2 is increased of speed by passing through vent ports 4, 11 and is exhausted. When the suction is ceased after the molding, the valve 13 is returned by the spring 14 to close the check valve 9, whereby the inside of the metal flask 2 is maintained at the specified degree of vacuum. Even if there is slight vacuum leakage after the hose 10 has been removed, the piston 7 which is held energized inward by a spring 6 in the cylinder 8 of the auxiliary suction device 1 moves so as to take the balance of the pressure in the cylinder 8 and the pressure in the metal flask 2, whereby the original degree of vacuum is maintained.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7816479A JPS564367A (en) | 1979-06-22 | 1979-06-22 | Metal flask for vacuum casting |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7816479A JPS564367A (en) | 1979-06-22 | 1979-06-22 | Metal flask for vacuum casting |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS564367A true JPS564367A (en) | 1981-01-17 |
Family
ID=13654282
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7816479A Pending JPS564367A (en) | 1979-06-22 | 1979-06-22 | Metal flask for vacuum casting |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS564367A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57138530A (en) * | 1981-02-13 | 1982-08-26 | Mitsubishi Electric Corp | Electric power source apparatus for machining with electrical discharge |
-
1979
- 1979-06-22 JP JP7816479A patent/JPS564367A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57138530A (en) * | 1981-02-13 | 1982-08-26 | Mitsubishi Electric Corp | Electric power source apparatus for machining with electrical discharge |
JPS6150737B2 (en) * | 1981-02-13 | 1986-11-05 | Mitsubishi Electric Corp |
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