• 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:
    Loosely poured granular material is compacted by a burst of air under pressure which is built up in a space Q1 and is abruptly released through the outlet end of a passageway Q3 which opens toward the material surface. While the pressure in Q1 is being built up and until released, it is restrained by a sealing member which concurrently covers the outlet side of Q1, the input end of passage Q3 and an accelerating space Q2. The sealing member is held in place by a counterpressure in a space Q4 acting on a larger surface area than Q1. The pressure is suddenly decreased in Q4, abruptly unbalancing the pressures and releasing the pressurized gas from Q1 into Q3 and against the surface.
    公开号:SU1674690A3
    申请号:SU833652165
    申请日:1983-09-30
    公开日:1991-08-30
    发明作者:Таннер Ханс；Фишер Курт
    申请人:Георг Фишер Аг (Фирма)；
    IPC主号:
    专利说明:

    nineteen
    Fig1
    The invention relates to foundry, in particular, to devices for making foundry molds in a pulsed manner.
    The aim of the invention is to improve the quality of the molds by increasing the valve response rate and expanding the technological capabilities by providing a seal for the wide format forms.
    FIG. 1 shows a device with an annular acceleration chamber, a longitudinal section; in fig. 2 - the same, option with disk cameras of acceleration; in fig. 3 - the same, with a disk camera acceleration; in fig. 4 - the same, an option with an annular sealing chamber; in fig. 5 - pneumatic system for working with several devices.
    The device (Fig. 1) comprises a housing 1 with a control housing 2, which are connected by means of a gasket. A valve plate 3 is placed in the control housing 2, having the ability to move along the inner side of the control housing 2 along the surface 4. The surface 4 of the casing can be made without special sealing elements with the same control medium and pressure impulse medium. if different media are used and, since the unit is tightly ensuring tightness, it is advisable to install a sealing element, for example a sealing ring, on the surface 4. A seal 5 is displaced over the back side of the valve plate 3 from the control housing 2 to ensure a tight fit of the back side of the valve plate 3
    The valve plate 3 can be shaped and, depending on the size of the hole to be sealed, can be equipped with ribs or other reinforcing elements. Plastic or elastomer can be used as a material for them, as well as metal, and preferably metal sealing elements should be equipped with an elastomeric sheath.
    On the lower side of the valve plate 3 is made sealing surface 6.
    An annular, one-sidedly open, reflective hollow body 7 adjoins the sealing surface b of the housing 1, which with the help of spacers 8 rests on the housing 1. The side of the additional reflective body 7 adjacent to the sealing surface 6 has a notch 9, which on both sides
    the edges of the reflective body 7 have sealing surfaces 10. Preferably, the depth of the recess 9 is in the range 1.0-2.0 mm. what is applied to
    compressed gas will provide loading of the smallest possible filling volume. In cases where additional pressure is used, generated by a pressure tank (not shown), the recess
    0 9 is executed greater depth. The sealing surfaces 10 and the recess 9 form a one-sidedly open space — chamber Q 2. The sealing surfaces 10 of the reflective body 7 adjacent to the sealing surface 6 restrict the so-called accelerating surface of the valve plate 3. By the moment of transition about: the closed state to the open accelerator surface
    0, with regard to the distribution of gas acting on the sealing element, there arises an overturning overturning affect, which accelerates the movement of the valve plate 3 when it is
    5 elevations, e. Due to the opening of the accelerating surface, a stepwise increase occurs. loadable surface under the influence of being eaten by the city dngt; camera Q 1 compressed
    0 gas per seal: Noah, the surface of the cluttered g-rail 3 n ne /. The accelerator surface.
    Instead of the recess 9 in the reflective body 7, a through-floor field can be provided, which in this case is formed. quasi-space when lifting the compacting surface 6 with the reflective body 7. Such a space is of little preference when it is viewed from the technical points of the freezing flow, since the accelerating surface must open at the same time in full. In order to ensure efficient use of the accelerator surface, the reflective body 7 must be installed in the part of the device that ensures the creation and transmission of pressure of compressed gas.
    Adjacent to the sealing surface 6, the sealing surfaces 10 may, for example, with the aim of improving the sealing, have a convex or other geometric shape.
    In order to control the pressure in the reflector chamber Q2, the latter is connected to the atmosphere or to the receiver via a line 11 and a regulating valve 12 (re shown)
    The connection of the reflective chamber Q2 with the atmosphere serves to align
    pressure after its push and for a new seal by means of the valve plate 3, however, by means of the compressed gas accumulated in the receiver, differential acceleration forces can be initiated that affect the accelerating surface of the valve plate 3.
    Centrally with respect to the annular reflective casing 7 or the pressure chamber Q1 formed by the pressure casing 1, an exhaust casing 13 is open on both sides with a pass-through chamber Q3. The upper end 14 of the exhaust casing 13 is located at the level of the seal of the reflective body 7 and is thus adjacent to the sealing surface 6 of the valve disk 3. In order to exert a favorable influence on the flow distribution with respect to pressure chamber Q1 and passage chamber Q3, defined by the sealing surface 6, the sealing plane can be divided into a number of planes. A possible embodiment with the sealing surface 15 of the valve plate 3 taken down is shown in FIG. 1 dotted line. The hollow body is shortened to the lowered sealing surface 15.
    The cross section of the exhaust casing 13 or the passage chamber Q3 can be either round or polygonal. In the region of the sealing surface 6, the cross section of the exhaust casing 13, in particular for large values, can be made with supporting ribs 16 for the valve plate 3. Instead of the supporting ribs 16, the hollow body 13 can be divided into several hollow bodies (FIG. 3), Moreover, the hollow bodies can also be made in the form of expanding nozzles, as a result of which the valve plate 3 creates better fitting conditions or better parameters of the flow of compressed gas with its limited course. The exhaust housing 13 may be made in the form of cylindrical or polygonal elements.
    The lower end 17 of the exhaust casing 13 is hermetically sealed in the plate 18 of the base of the pressure casing 1 so that its opening is directed towards the surface 19 of the molding material.
    For connection with the molding installation 20, the pressure housing 1 is formed on the base plate 18 with the connecting part 21.
    The walls of the pressure housing 1, on the one hand, and the exhaust body 13, on the other hand, are one-sidedly open with respect to the valve plate 3, the chamber 01, to which the supply line 22. is connected, which supplies the working medium, for example compressed air. A valve 23 is installed in the supply line 22, with which the medium supply can be controlled.
    The connecting part 21 is installed necessary to reduce the pressure of compressed gas on the surface 19.
    0 of the molding material decompression on line 24, which is connected to the atmosphere through the decompression valve 25 (in this case, through the sound damper). Walls of the manager
    5 housing 2, on the one hand, and the reverse side of the valve plate 3, on the other hand, form the control chamber Q4. A line 26 passes through one of the walls of the control housing 2, in which
    0 valve 27 connected to inlet 28 and outlet 29 lines
    Through line 26, the valve plate 3 can be unilaterally loaded with a working medium, such as compressed air.
    In the preferred embodiment, the control chamber Q4 is connected to the buffer chamber Q5 of the additional tank 30, as a result of which, under the influence of the air in the chamber Q5, a buffer effect is obtained for the valve plate 3 moving in steps.
    Both the pressure body 1 and the control body 2 can be equipped with gauges 31 and 32 for measuring pressure.
    FIG. 2 shows a variant of the device in which a plastically deformable sealing element 33 is used, and the use of
    0 multiple reflective housings 7 and exhaust housings 13 open on both sides. Sealing element 33 surrounded by control casing 2 in order to enable a quick change
    Form 5 is made in the form of an element of the type of sylphon from one elastomer. From the sealing surface 34 of the sealing element 33, this element is equipped with a reinforcement plate 35, which serves to improve the tightness when it fits.
    An additional reservoir 37 is connected to the control housing 2 or to the sealing element 33 through the passage opening 36. The sealing element 33 encloses the control chamber Q4, and the additional tank 37 contains the buffer chamber Q5. Buffer chamber Q5, in conjunction with control chamber 04, provides damping for the repulsive backward
    sealing element 33 In order to ensure effective braking, the valve 38, which is in line 39, which leads to the sealing element 33, must be closed. The valve 38 is equipped with a feed line 40 and a discharge line 41. A supply line 40 is connected to a receiver (not shown) that accumulates the working medium under the necessary pressure used for one-sided loading of the sealing element 33. On the discharge line 41 Discharge of the working medium, which is released through line 39 with decreasing pressure on the sealing element 33.
    Reflective housings 7 with one-sidedly open reflective chambers Q2 rest on the base plate 18 of the pressure housings 1. In order to prevent the pressure housings Q1 of the pressure housings 1 from being reduced under the influence of the supporting reflective housings 7, the latter can be positioned on space-saving supports 42. lead lines 43 with regulating elements 44, for example valves, which are connected to atmosphere 1, li c, pressure tank 45
    With alternation relative to reflective bodies 7 at a distance oi neither. set open on both sides, then ecTt. passing through, exhaust bodies 13 with passage chambers and Q3. In this case, with the seal on the base plate 18 of the base plate 13, there are a large number of openings of the pass-through chambers Q3 directed towards the surface 19 of the molding material to form a seal with the latter. The pass-through chamber Q3 serves to transmit the initiated pressure push and is preferably arranged with an extension on the exit side.
    FIG. 3 shows a variant of the device in which the space of the housing 1 forms an entrance pv Q3 open on both sides. The bottom side of the housing 2 comprises a connecting part 21 for a molding t, ro device. By means of the connecting part 21 and the clamping elements, the housing 1 is connected to the forming device. A line 24 is attached to one wall of the housing 1 with a control valve 25, which serves to decompress the pressure impulse applied to the sand surface 19. Inside the case 1, connected to the latter through peber 46, is installed a one-sidedly open hollow body 47, which is connected to receiver 50 via line 48 with valve 49 to the receiver 50
    50, for its part, is connected via valve 51 to a pressure source.
    The open side of the hollow body 1 bends around the reflective body 7 with the reflective chamber 02. The reflective chamber 02 is disk-shaped and communicates with line 11, which is connected through valve 12 to the atmosphere.
    To interact with the chamber 03, it is also possible to use the taps 52, by means of which it is possible to control the operation of the control elements simultaneously with the initiation or control of the pressure impulse.
    5 with the housing 1, the control housing 2 encloses the control chamber 04. in which the valve plate 3 is installed with the sealing surface 6. The valve plate 3 is in the form of a cylindrical shell
    0 can be made of metal with an elastomeric coating or plastic.
    The surface 53 of the valve disc shell 3 is wrung up in the preferred embodiment, is sealed
    5 ipi with limited backlash. In the case of a backlash-free installation, it is preferable to perform (. Aeroe g of the surface 54 with a control that prevents the control camera from exiting the working medium 04
    0 Buffer camera Q5 through passage
    About; Hersti 55 is connected to the control housing 2. Into the passage opening 55 in /, the art control line 56 which connects to the valve 57 and - through the diverter
    5, line 58 and the locking device to the pressure point.
    Cha FIG. 4 shows the arrangement of the valve plate 3, in which there is a more free play between it and
    0 internal surface of the control chamber Q4
    The control housing 2 is installed in the pressure housing 1 on the ribs 59. Sealing the control housing 2
    5 is carried out using the cover 60. The inner side of the cover 60 is directed toward the control space and has a gasket 61 of elastomer. The side of the reflective body 7, directed to
    0 of the valve plate 3. contains a recess 9 extending along the envelope line, which, together with the valve plate 3, forms a reflecting chamber 02, which is connected through the line 11 with the atmosphere.
    5 Sealing the pressure casing 1
    provided with a cover 62 of the base plate 6L. The base plate 63 has a connecting device, by means of which a 1 ms pressure box P1 is connected to a molding unit. In the base plate 63, tubular hollow bodies 64 are provided, which extend into the pressure chamber Q1. The hollow bodies in the form of tubes can run parallel to one another or in the form of beams towards the space 65. In the pressure chamber Q1 a pressure line 66 passes through the cover 62 of the pressure body 1 for supplying compressed working medium, such as compressed air, the supply of which is regulated by a valve 67. Outside the pressure housing 1, the control medium (compressed air) is supplied by means of two valves 68 and 69. The supply takes place via line 70 through the wall of the pressure housing, with compressed air flowing through the cover 60 of the control housing 2 into the control chamber Q4. Valve 68 functions as an inlet valve, and valve 69 acts as an exhaust valve. A deaeration line passes through the side wall of the pressure casing 1 on line 71, which leads to the space 65. The deaeration line 71 is controlled by a valve 72 and is connected to the atmosphere through the noise muffler 73.
    The device works as follows.
    The reflective chamber 02 of the reflective body 2 is loaded with atmospheric pressure, thereby deaerating it. Then the valve of the control line is opened, as a result of which a control pressure is created on the side of the valve plate 3. After it, under the influence of a control pressure, it is pressed against the sealing surface 6 and closes the pressure chamber CM. the reflection chamber Q2 and the passage chamber 03. open the valve 23 and fill the pressure chamber 01 with the working medium. At the same time, the working medium, for example, compressed air, acts in chamber 01 as the pressure opposite to the control pressure on the sealing surface of the valve plate 3. The force acting according to the control pressure on the valve plate 3 constantly exceeds the force which operates from the pressure chamber 01.
    When using the same working media both in terms of control pressure and pressure impulse, it is preferable to keep the pressure equal on both sides of the valve plate 3. Since the loading surface of the valve plate 3 is always greater on the control side, reliable sealing is ensured in this case. .
    When a pressure is applied to the upper part of the molding material, the pressure in the control chamber 04 drops to a value that corresponds to an excess of the equilibrium state. Due to the elimination of the equilibrium state, i.e., the moment the accelerating surface transitions from the closed to the open state, the pressure of the compressed air from the porous space, in accordance with the reflex effect of the overturning of the pressure state, now acts spasmodically on the valve plate 3 and raises it from the side of the reflective 5 body 7, i.e. from the accelerating surface. Thereby, the surface is briefly increased, subjecting to pressure from the pressure chamber 01, and abruptly.
    0, the valve plate 3 rises, thereby opening a passage to the passage chamber Q3. Due to the abrupt release of the passage space, the same abrupt
    5 decompression of air contained in the pressure chamber 01, which affects the molding material as a pressure impulse.
    Simultaneously with the impact of a jolt
    The 0 pressure closes the valve 27, and therefore the residual compressed air in the control chamber 04 and the buffer chamber 05.
    Under the influence of the rapid movement of the valve plate 3 residual compressed
    5, the air is compressed and thereby has a braking effect on it.
    After the impact of pressure on the surface 19 of the molding material, i.e. after its compaction, the passage chamber 03
    0 is locked by the valve plate 3 and the supply of the working medium is stopped,
    Due to the fact that after performing the sealing process above the surface 19 of the molding material
    5, the residual pressure is constantly maintained; it must be removed before the mold is separated from the device by unlocking the valve 25 through line 24. Before decompression, all supply lines
    0 close.
    After that, the finished mold is removed and the cycle is repeated. Different media can be used to create pressure shocks, but it is best to use compressed air or inert gas in control chamber 04.
    The use of this invention allows to improve the quality of the forms by increasing the speed of valve actuation, as well as to seal the widescreen
    forms, i.e. expand the technological capabilities of the device.
    权利要求:
    Claims (3)
    [1]
    Claim 1. Device for compacting granular molding materials with pressure impulse of gaseous medium, comprising a housing, a pressure chamber, communicated with a source of compressed air, a control chamber, a buffer chamber, an acceleration chamber, an exhaust chamber, a valve plate placed in the housing with the possibility of interaction with a saddle of the exhaust body, characterized in that, in order to improve the quality of the forms by increasing the valve response rate and
    widening the technological capabilities by providing a seal of large format forms, it is equipped with an additional housing with a notch located in the upper part of the pressure chamber, the acceleration chamber is formed by a notch of the additional housing and valve plate and is connected to the atmosphere, and the exhaust housing is rigidly fixed in the pressure chamber housing.
    [2]
    2. Pop 1 device, characterized in that the acceleration chamber has the shape of a ring.
    [3]
    3. Pop-1 device, characterized by the fact that the acceleration chamber is disk-shaped.
     Have
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    I 21G8
    I
    45
    FIG. 2
    thirty
    I / j
    6
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    6b 65/9
    50
    FIG L
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    FIG. five
    Dod
    类似技术:
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    同族专利:
    公开号 | 公开日
    DE3333005A1|1984-04-05|
    IT1171094B|1987-06-10|
    GB8326080D0|1983-11-02|
    PL243973A1|1984-07-02|
    AU1979083A|1984-04-05|
    GB2127726B|1986-07-02|
    AU565133B2|1987-09-03|
    SE463245B|1990-10-29|
    DK160678B|1991-04-08|
    US4565233A|1986-01-21|
    CH648225A5|1985-03-15|
    DK160678C|1991-09-23|
    NL184601B|1989-04-17|
    PL141731B1|1987-08-31|
    CA1201268A|1986-03-04|
    ES525933A0|1984-12-01|
    NL184601C|1989-09-18|
    BE897840A|1984-01-16|
    SE8305388D0|1983-09-30|
    DD215486A5|1984-11-14|
    SE8305388L|1984-04-02|
    AT387923B|1989-04-10|
    DK453783A|1984-04-02|
    DE3333005C2|1986-04-10|
    ATA319583A|1988-09-15|
    NL8303248A|1984-05-01|
    IT8323067D0|1983-09-29|
    CZ706283A3|1995-06-14|
    DK453783D0|1983-09-30|
    JPH0219738B2|1990-05-02|
    CZ280138B6|1995-11-15|
    FR2533848A1|1984-04-06|
    ES8501265A1|1984-12-01|
    GB2127726A|1984-04-18|
    FR2533848B1|1986-05-23|
    JPS5982144A|1984-05-12|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US1594598A|1922-09-28|1926-08-03|Donald J Campbell|Air-operated molding apparatus|
    US1533220A|1922-10-16|1925-04-14|Donald J Campbell|Molding apparatus|
    DE1961234C3|1969-12-05|1975-02-06|Kramatorskij Nautschno-Issledowatel' Skij I Projektno-Technologitscheskij Institut Maschinostrojenija, Kramatorsk |Method and device for compacting casting molding compounds|
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    SU774776A1|1979-01-18|1980-11-02|Краматорский Научно-Исследовательский И Проектно-Технологический Институт Машиностроения|Pneumatic-pulse head|
    CH642288A5|1980-02-18|1984-04-13|Fischer Ag Georg|METHOD AND DEVICE FOR COMPRESSING MOLDING MATERIAL, ESPECIALLY FOR CASTING MOLDS.|
    SU933189A1|1980-07-04|1982-06-07|Краматорский Научно-Исследовательский И Проектно-Технологический Институт Машиностроения|Pulse head|
    DE3202395A1|1981-01-28|1982-08-26|BMD Badische Maschinenfabrik Durlach GmbH, 7500 Karlsruhe|Process and equipment for pneumatic compaction of moulding sand|
    DE3243951C2|1981-12-28|1988-10-27|Bmd Badische Maschinenfabrik Durlach Gmbh, 7500 Karlsruhe, De|
    CH659012A5|1982-07-20|1986-12-31|Fischer Ag Georg|METHOD AND DEVICE FOR COMPRESSING GRAINY MOLDS.|CH664914A5|1982-10-15|1988-04-15|Fischer Ag Georg|DEVICE FOR COMPRESSING A DIMENSION OF GRINED MOLDING MATERIAL.|
    GB8415848D0|1984-06-21|1984-07-25|Doyle Ltd C F|Compacting moulding mixture|
    CH666426A5|1984-06-25|1988-07-29|Fischer Ag Georg|Form investment.|
    GB8628132D0|1986-11-25|1986-12-31|Doyle Ltd C F|Compacting moulding mixture|
    CH672270A5|1986-12-17|1989-11-15|Fischer Ag Georg|
    ES2006861A6|1988-03-21|1989-05-16|Lopez Foronda Fernandez Vicent|Improvements introduced in airvessels for molding by expansive waves.|
    AU644702B2|1990-12-14|1993-12-16|Sintokogio Ltd.|Compressed air blowing apparatus for use in green sand mold molding facility|
    CH686412A5|1992-03-10|1996-03-29|Fischer Georg Giessereianlagen|A method of compacting molding sand for molds.|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    CH5799/82A|CH648225A5|1982-10-01|1982-10-01|METHOD AND DEVICE FOR COMPRESSING GRAINY MOLDING MATERIALS, IN PARTICULAR FOUNDRY MOLDING MATERIALS.|
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