• 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:
    The method wherein a) a pressure is injected into the supply (2) in the funnel-shaped inlet (4) for initiating the filling and fluidization of the mould material, b) a pressure is established above the supply for insertion of mould material through the inlet, and c) the fluidization pressure and the insertion pressure are controlled independently, is achieved by means of an apparatus comprising a mould chamber (8) with pressure plates (11, 12) movable towards each other, to which plates mould plates (9,10) are fastened, and in which the mould chamber (8) can be connected through one or more passage apertures (14, 18) partly with a supply of mould material (2) being under pressure, partly with a vacuum source (16) and a pressure source (17) respectively.
    公开号:SU1757447A3
    申请号:SU853923151
    申请日:1985-06-14
    公开日:1992-08-23
    发明作者:Берг Ларсен Ааге
    申请人:Данск Индустри Синдикат А/С (Фирма)；
    IPC主号:
    专利说明:

    the gas in the lower part of the hopper to fluidize the mixture and during the eqero process of filling the mold independently regulate the pressures of the compressed gas over the moldable mixture in the bunker and in the lower part of the bunker due to the laminar flow of the molding sand from the bunker depending on the configuration of the cavity of the press -forms and taking into account the changing configuration of the cavity of the mold during its filling. After the molding sand is pressed, the mold is opened and the finished product is removed, during which compressed air is fed into the mold using the same channels as for evacuation.
    The drawing shows the scheme of manufacture of the product according to the proposed method.
    The manufacture of the product is carried out as follows.
    A mold 3 is placed under the hopper 1 with the molding mixture 2. Through the air channels 4 in the side walls of the hopper 1, pressurized air is introduced into the space above the molding mixture 2. At the same time, in the lower part of the bunker, the mixture is fluidized by applying high pressure air through pipelines 5. Compressed air is supplied from compressed air tank 6, which is replenished with compressed air by means of a compressor through valve 7.
    The mold 3 in the transverse direction is bounded by the molding plates 8 and 9, which under the action of the piston system 10 (only one piston is shown) move towards each other under great pressure. The molding plates are made up of channels 11, which are connected to supply source 13 and pressure source 14, respectively, using supply lines and a three-way valve 12.
    The feed of the molding mixture from the hopper is accompanied by vacuuming the cavity of the mold through the channels 11 located in the cavities of the mold, using a source of discharge 13. During the entire process of filling the mold, the pressures of the compressed air above the molding sand are independently controlled. in the bunker and in the lower part of the bunker from the conditions for ensuring the laminar flow of the molding sand from the bunker, depending on the configuration of the cavity of the mold and taking into account its change during the filling process.
    Thus, in particular, in the manufacture of products whose shape corresponds to that shown in the drawing, the pressure control is carried out as follows.
    In the first stage, when the indentations of the mold are filled, the pressure over
    molding sand in the hopper should gradually increase. In the second stage, when a larger portion of the central part of the mold is filled (approximately 2/3), the pressure above the molding sand is
    the hopper should be lowered at a damped rate of descent. The remaining part of the mold is filled with increasing pressure over the moldable mixture in the hopper. In this case, the rate of increase in pressure must be higher than in the first stage and the absolute value of the pressures at the last moment of filling must be the highest. The pressure of the compressed gas in the lower part of the bunker
    to liquefy the mixture is reduced to the final stage of filling the mold. As the molding sand continues to flow, the molding plates 18 and 9 begin to move towards one another under
    the action of the working cylinder (not shown) through its piston system 10.
    The transfer of the molding plates stops at the moment when the required amount of the mixture is fed into the mold.
    and the molding is stopped.
    The mold is opened and the finished product is removed with simultaneous supply of compressed air through
    vacuum channels.
    权利要求:
    Claims (2)
    [1]
    The injection of compressed air through the evacuation channels creates an overpressure on the surface of the mold, which facilitates its separation from the mold, especially in places of recesses and projections. In addition, the applied overpressure allows the channels to be cleaned from the molding material penetrated into them during vacuuming. Thus, the mold is prepared for the next molding operation at this stage, which improves the productivity of the process. Claim 1. Method of making molded
    products, which include feeding the molding mixture from the hopper into the mold by pressurizing the molding mixture in the hopper while evacuating the mold and then pressing the mixture, opening the mold and removing the finished product, characterized in that. in order to provide high and uniform product density and reduce cycle time, while simultaneously creating pressure over the molding
    the mixture serves compressed air to the bottom
    Part of the fluidization hopper for the mixture, during the whole process of filling the mold, independently controls the pressures of compressed air over the moldable mixture in the hopper and in the lower part of the bunker to ensure the laminar flow of the molding sand from the hopper depending on the configuration of the cavity of the mold and given her
    changes during the filling process, and vacuuming of the mold is carried out through channels located in the recesses of the mold.
    [2]
    2. A method according to claim 1, characterized in that during the opening of the mold and the removal of the finished product, compressed air is supplied to the mold using the same channels as for evacuation.
    L.V4 X ... X / XCWOWC 4VW X-1
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    同族专利:
    公开号 | 公开日
    EP0164731A1|1985-12-18|
    JPH0261868B2|1990-12-21|
    EP0164731B1|1988-03-23|
    JPS6182950A|1986-04-26|
    PL144177B1|1988-04-30|
    ES8607774A1|1986-06-01|
    DK294584D0|1984-06-15|
    DE3561929D1|1988-04-28|
    PL253954A1|1986-04-22|
    CA1266362A|1990-03-06|
    ZA854335B|1986-01-29|
    DD238745A5|1986-09-03|
    ES544190A0|1986-06-01|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US1475935A|1922-10-02|1923-12-04|Tabor Mfg Co|Method and apparatus for forming sand molds|
    LU30790A1|1950-06-12|1951-08-01|
    BE508903A|1951-02-09|
    DE1941736B1|1968-08-19|1971-07-29|Buehler Eugen|Procedure in boxless molding machines for pouring in the molding sand and machine for carrying out the same|
    DE2609274A1|1976-03-05|1977-09-08|Buehler Eugen|Compacting sand into mould or core boxes - in which partial vacuum is applied via holes in pattern plate to aid compaction|
    JPS5314647U|1976-07-16|1978-02-07|
    JPS57171545A|1981-04-13|1982-10-22|Sintokogio Ltd|Molding device for hollow core|
    US4437507A|1981-08-11|1984-03-20|Seeley Robert J|Molding machine|
    JPS6321584B2|1981-10-31|1988-05-07|Shinto Ind|RU1780917C|1989-06-29|1992-12-15|Научно-Производственное Объединение Технологии Автомобильной Промышленности|Method and device for manufacturing one-time casting molds|
    CH689634A5|1990-03-20|1999-07-30|Dansk Ind Syndikat|Casting mould prodn. system|
    DK169203B1|1993-07-01|1994-09-12|Dansk Ind Syndikat|Method and apparatus for making molds or mold parts by blowing particulate material into a molding chamber|
    DE19745093B4|1997-10-11|2007-03-01|Hydro Aluminium Alucast Gmbh|Device for producing casting molds or molded parts|
    WO2001056723A1|2000-02-04|2001-08-09|Disa Industries A/S|Method and apparatus for producing casting moulds or mould parts|
    EP1184106B1|2000-02-17|2013-07-17|Sintokogio, Ltd.|Method and device for filling casting sand|
    US6871689B2|2001-02-07|2005-03-29|Disa Industries A/S|Sand moulding machine with improved sand blow|
    KR101223285B1|2010-11-02|2013-01-16|최경화|remote control warning triangle|
    CN105216197A|2015-10-20|2016-01-06|重庆跃发日用品有限公司|A kind of blending feeding method of Mold for Plastics binder|
    CN106623813A|2016-12-28|2017-05-10|池州恒和精密机械有限公司|Sand mold machining device for hollow casting|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DK294584A|DK294584D0|1984-06-15|1984-06-15|PROCEDURE FOR MANUFACTURING FORM PARTS|
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