• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A process for controlling a vessel for a repeated pouring of a liquid under low pressure into blind sand moulds. The process comprises after each pouring, lowering the liquid in the pouring tube only to a level which is equal to or substantially equal to a constant predetermined level in the vicinity of the outlet of the tube. According to the invention, the level of the liquid in the tube and the pressure of the driving gas prevailing in the vessel are measured directly and the inlet and exhaust of the driving gas are controlled as a function of these measurements so as to ensure, for all the pourings, a pressure rise time and a pressure drop time which are predetermined and substantially constant. A device is described for carrying out this process.
    公开号:SU946392A3
    申请号:SU772535699
    申请日:1977-10-18
    公开日:1982-07-23
    发明作者:Беллоси Рио
    申请人:Понт-А-Муссон С.А.(Фирма)；
    IPC主号:
    专利说明:

    the end of the metal pipe 5 immersed in the metal. The metal from the crucible enters the metal pipe under the action of gas pressure, which is supplied to the upper part of the crucible 1 through the inlet 6 and is discharged through the outlet 7 located at approximately the same level as the previous one. Holes 6 and 7 are above the level of the metal in the crucible and are located near the top wall of the 8 crucibles.
    The minimum and maximum levels of the metal in the crucible are indicated in FIG. 1 by lines N and 2. respectively. The lower end 9 of the metal conduit 5 is located near the bottom of the crucible 1. In the upper part of the metal conduit there is a level 10 sensor, made in the form of an inductor consisting of a copper tube 11 wound in the form of a spiral and built-in refractory material. The core of the inductor is a column of liquid metal in the metal pipe. The inductor is connected to an alternator. Copper tube is made cooled. A pressure sensor 12 is placed in the crucible. The aperture 7 is connected by a gas outlet pipe 13, on which a valve 1 is installed, to a gas outlet pipe 15.
    Hole 6 is connected by pipes 16-18 through a reducing valve 19, a controlled reducing valve 20 with a source 21 of pressure. Battery 22 and control valve 23 are installed in front of valve 20.
    The device works as follows.
    The pressure P, which must be created in the crucible to move the metal into the mold, is equal to Р РО + PC, where PO is the pre-pressure in the crucible necessary to maintain level 5 metal in the conduit. This pressure may vary depending on the level of the metal in the crucible 1 between N and N levels. PC is the pressure that is required to lift the metal from the level in the metal pipeline to the level that ensures the filling of the mold cavity.
    The PC pressure is constant regardless of the metal level in the crucible.
    Form 3 is installed at the end of the metal pipe 5. The pressure inside the crucible 1 above the metal level is atmospheric and the metal is at the same level. Sensor Yu
    The level signals the absence of metal inside the inductor. This signal is transmitted via line L to a reduction valve 19 which opens and connects the pressure source 21 to the crucible. An increase in pressure occurs in the crucible, with the result that the level in the metal duct rises. Upon reaching the N level, the signal supplied by the level sensor 10 along the Ly line closes the valve 19. The metal level in crucible 1 is set to N2, and in the metal wire 5-N. A PO is established inside the crucible.
    Now, the pressure sensor 12 is energized and transmits a signal on the line Li to the reducing valve 20, which ensures that the controlled valve opens so that the pressure in the crucible rises to PO + Pt in a certain period of time. Valve 20 opens and charges battery 2 22 to PO + PC pressure, which will serve as a pressure source during the casting process.
    The casting process is carried out as follows.
    The control unit 2k causes the opening of the valve 23 according to the indication of the pressure sensor 12. The metal level in the metal conduit 5 rises and the cavity of the mold 3 is filled with metal. During this time the level of N 2 is lowered. After the expiration of the time Vl and filling the form, the control unit 2k closes the valve 23. The sensor 12 sends a signal to the valve AND to release the pressure.
    Since part of the metal was directed to the mold, after removing the PC pressure in the metal pipeline, the level would be set below N. This would require installing inside the crucible a pressure PO greater than PO before starting the second pouring.
    After the first casting, the invention makes it possible to immediately establish a pressure PO in the crucible corresponding to the level N in the metal pipe. It happens as follows.
    Sensor level 10, after expiration. time for filling the form, is in continuous excitation. The presence of a metal column in the inductor causes the signal to act on the valve k along the line L, which reduces the pressure in the crucible to the value of PO.} Corresponding to level N. The level in metal 3 is lowered.
    权利要求:
    Claims (2)
    [1]
    Claim
    1. Device for controlling casting in low pressure casting
    946392 6 in one-time forms, containing a metal wire, a gas supply pipe to the crucible, a gas pressure sensor installed in the crucible, a gas exhaust pipe equipped with a valve, characterized in that, in order to intensify the casting process ( it is equipped with a metal level sensor in the metal wire, in this case, the valve u of the gas exhaust pipe is made controllable from a gas pressure sensor and a metal level sensor.
    [2]
    2. The device according to p. 1, characterized in that the metal level sensor 15 is made in the form of an inductor located around the upper part of the metal wire inside the crucible and connected to an alternating current generator.
    2o 3- Device pop. 2, characterized in that the inductor is made in the form of a spiral metal tube mounted in a refractory material.
    25 4. The device according to p. 3, which is conceivable in that the spiral metal tube is made cooled.
    30 Sources of information taken into account in the examination
    1. Patent of England No. 1437724, cl. F 1 R, 06/03/76.
    L
    Ζΰ
    Zz
    Branch of PPP Patent,
    Uzhhorod, P reekt naya st. 4
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    同族专利:
    公开号 | 公开日
    SE7711326L|1978-04-19|
    FR2367566B1|1980-07-18|
    DK153925C|1989-02-13|
    NL176914B|1985-02-01|
    JPS5985663U|1984-06-09|
    US4143687A|1979-03-13|
    IT1091198B|1985-06-26|
    DK153925B|1988-09-26|
    CH614646A5|1979-12-14|
    DE2746799A1|1978-04-20|
    DE2746799B2|1981-03-12|
    GB1594613A|1981-08-05|
    DK461177A|1978-04-19|
    AU497356B2|1978-12-07|
    JPS6032927Y2|1985-10-01|
    BE859815A|1978-04-17|
    ES463313A1|1978-12-16|
    EG12769A|1981-03-31|
    NL7711370A|1978-04-20|
    SE442836B|1986-02-03|
    BR7706931A|1978-06-27|
    CA1115927A|1982-01-12|
    JPS5350018A|1978-05-08|
    DE2746799C3|1986-07-31|
    NL176914C|1985-07-01|
    UA6074A1|1994-12-29|
    FR2367566A1|1978-05-12|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    FR1488313A|1966-04-22|1967-07-13|Ct De Rech S De Pont A Mousson|Advanced device for controlling liquid ladles|
    DE1758657A1|1968-07-15|1971-04-15|Modern Equipment Co|Method and device for casting liquid metals in measured quantities|
    DE2022989C3|1970-05-12|1974-04-04|Westofen Gmbh, 6200 Wiesbaden|Device for dosing molten metal|
    DE2111823A1|1971-03-12|1972-09-21|Schloemann Ag|Metal pressure casting - control system|
    SE364654B|1971-11-18|1974-03-04|Asea Ab|
    DE2307846B2|1973-02-17|1976-08-19|Brown, Boveri & Cie Ag, 6800 Mannheim|PROCEDURE AND ARRANGEMENT FOR SELF-ACTING REMOVAL OF MOLTEN METAL|
    JPS49122428A|1973-03-28|1974-11-22|
    GB1437724A|1973-08-02|1976-06-03|Soag Machinery Ltd|Low pressure die casting|
    BG19404A1|1973-08-16|1975-06-25|
    DE2433060C2|1974-07-10|1978-06-22|Otto Junker Gmbh, 5101 Simmerath|A method of pouring predetermined quantities of molten metal and apparatus for carrying out this method|
    JPS5340790Y2|1974-12-26|1978-10-02|
    DE2624435B2|1976-06-01|1981-03-26|Brown, Boveri & Cie Ag, 6800 Mannheim|Process for the metered casting of molten metals|US4218412A|1975-07-16|1980-08-19|Showa Denko Kabushiki Kaisha|Method for preventing vapor explosion in a liquid comminuting process|
    FR2453699B1|1979-04-13|1983-02-04|Fonderie Soc Gen De|
    US4338341B1|1980-05-23|1991-12-10|Automated Machinery Systems|
    JPS5850166A|1981-09-18|1983-03-24|Nissin Kogyo Kk|Low pressure casting method by holding of residual pressure|
    JPS5850168A|1981-09-22|1983-03-24|Hitachi Metals Ltd|Prevention for clogging of sprue|
    DE3317474A1|1983-05-13|1984-11-15|Russ-Elektroofen Produktions-Gesellschaft mbH & Co KG, 5000 Köln|LOW-PRESSURE CASTING METHOD AND DEVICE FOR ITS IMPLEMENTATION|
    JPH0683889B2|1985-08-02|1994-10-26|新東工業株式会社|Low pressure casting equipment|
    FR2647379B1|1989-05-05|1991-07-26|Pont A Mousson|METHOD AND DEVICE FOR SUPPLYING LIQUID METAL TO A MOLD|
    FR2648064A1|1989-06-12|1990-12-14|Etude Dev Metallurg|LOW PRESSURE CASTING PROCESS IN A VACUUM MOLD MORE ESPECIALLY FOR THE MANUFACTURE OF THIN PARTS AND DEVICE FOR ITS IMPLEMENTATION|
    FR2663571B1|1990-06-22|1994-11-25|Pont A Mousson|LOW PRESSURE METAL CASTING, MOLD AND INSTALLATION PROCESS.|
    US5325905A|1990-06-22|1994-07-05|Pont-A-Mousson S.A.|Method and apparatus for multi-stage, low-pressure metal casting|
    FR2663572B1|1990-06-22|1994-11-25|Pont A Mousson|METHOD FOR SUPPLYING LOW PRESSURE METAL OF A CORD SAND MOLD, MOLD AND CORRESPONDING CAST INSTALLATION.|
    JP2517810B2|1991-11-11|1996-07-24|株式会社神戸製鋼所|Low pressure casting method|
    AU7321694A|1993-07-02|1995-01-24|Frank W. Schaefer, Inc.|Low pressure casting process and apparatus|
    US5590681A|1993-07-02|1997-01-07|Frank W. Schaefer, Inc.|Valve assembly|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    FR7631267A|FR2367566B1|1976-10-18|1976-10-18|
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