• 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 material of the mould (9) is poured up to a given level on a plate (1) carrying the model (2). The latter is surrounded by a form casing (3) and a filling frame (4). The setting of a lid (8) forms a hollow space (10) into which a combustible substance is ignited. The rapid combustion produces a pressure wave which compresses the material of the mould. The pressure drop of the pressurised gas thus obtained can be controlled or monitored by means of a diaphragm or a check valve so that in a brief lapse of time a homogeneous and dense mould is formed.
    公开号:SU1019994A3
    申请号:SU803215949
    申请日:1980-12-03
    公开日:1983-05-23
    发明作者:Таннер Ханс；Фишер Курт
    申请人:Георг Фишер Аг (Фирма)；
    IPC主号:
    专利说明:

    2. Method no. 1, characterized in that the process of reducing pressure from pressure, ensuring the condition of not breaking up the compacted mixture, to atmospheric is carried out for 0, 5 s, 3. A device for compacting the molding material, containing a model-tooling set On it is a chamber with a gas supply and ignition system and an exhaust opening, characterized in that, in order to increase the uniformity of compaction and to obtain a smooth surface on the upper side of the mold, it is equipped with an exhaust opening installed in 10 A to regulate pressure. A. The device according to claim 3. characterized in that the means for regulating the pressure is made in the form of a hollow sleeve and a flap with a central hole connected to each other through an elastic element, 5. The device according to claim 3. a means for controlling pressure in the form of a throttle valve; 6. The device according to claim 3, characterized in that the means for adjusting pressure is made in the form of a shock valve.
    FIELD OF THE INVENTION The invention relates to foundry, in particular, to the methods of making one-off casting molds.
    The closest to the invention to the technical essence and the achieved effect are the method of compacting the casting molds, including dispensing the molding sand, sealing it with a gas explosion pressure in a closed volume and reducing the gas pressure, and a device for carrying it out, containing the model-snap tooling installed on it chamber with gas supply and ignition system and exhaust port CO.
    The known technical solution does not allow to obtain the same density in the cross section of the form, as well as its smooth upper surface due to the fact that the exhaust gas outflow process is not regulated. The purpose of the invention is to increase the uniformity of compaction and obtain a smooth surface on the upper side of the mold.
    The goal is achieved by the method, which includes dispensing the molding sand, sealing it with a gas explosion pressure in a closed volume and reducing the pressure, reducing the gas pressure from the maximum to the pressure ensuring that the compacted mixture is not diluted, and then continues to reach atmospheric pressure - linear.
    At the same time, the process of reducing the pressure from the pressure, which ensures the condition of non-loosening of the compacted mixture, to an atmospheric pressure takes 0.5-1.5 s.
    A device for compacting the molding material, comprising a model-tooling snap-in, a chamber installed on it with a gas supply and ignition system and an exhaust hole, is provided with a means for controlling pressure installed in the exhaust port.
    The pressure control means may be made in the form of a hollow sleeve and a valve with a central bore, interconnected through an elastic element, in the form of a throttle valve, and in the form of a shock valve.
    FIG. 1 shows a device for compacting a molding material, vertical section; in fig. 2 regulating device; in fig. 3 the same, vchdide throttle; in fig. 4 - the same, in the form of a valve with a pusher; in fig. 5 is a graph of the relationship between pressure and vrMb MBM
    A device for implementing the molding material sealing method consists of a model plate 1 with model 2, a mold 3 is installed on model plate 1 with a filling frame L, which, in turn, has a cap-shaped cover 5. All these elements form chamber 6. In the cover 5, a pipeline 7 is provided for supplying fuel and an additional pipeline 8 for oxidizing water. A spark plug 9 is installed between the pipes. In the opening of the side wall of the lid 5, a pressure control device 10 is located adjacent to the exhaust pipe 11; The self-regulating device for controlling the pressure in chamber 5 (fig. 2) consists of a disk 12 with an opening 13, spring-loaded relative to the sleeve 1 with an opening 15, and the disk 12 has the ability to rest on the ledge 1b. The device works as follows. A dosed amount of molding material 17 is fed into the cavity of the flask 3 and the cumulative frame k and the cover 5 is placed on top. After the explosive combustion of fuel, a pressure wave arises, which is sufficient to seal the material. The explosion pressure, overcoming the action of the spring 18, presses the disk 12 to the ledge 16, sealing the chamber 6. Therefore, the gas can escape only through the opening 13. After the pressure p drops off the chamber 6 to a predetermined value, the spring 18 pushes the disk 12 into the chamber opening and allowing for a faster decrease in pressure; i Curve of a b c (Fig. 51 shows pressure distribution without a regulating device. Starting from peak d of a pressure of about 6 bar, the pressure drops along a curve like a hyperbola, c theoretically approaching the horizontal. With a sharp drop in pressure along the abc curve, the compressive strength is lower in some 4 areas than during slow expansion, as the gas remaining in the molding material expands too quickly, causing it to loosen. forms are obtained when the predetermined period of gas expansion to atmospheric is at least 0.5 s. The pressure drop during continuous gas expansion occurs along the curve a be. In this case, it is necessary to produce further expansion at a given pressure level faster than with ordinary exhaust gas. The areas of bc shown by dashed lines and the two levels b and c of pressure occur. At the control point, an instability of the pressure distribution profile is formed, which. leads to a turbulent outflow of gas and a sharp increase in the rate of decrease in pressure and, consequently, a decrease in the quality of the forms. By choosing the point b as the pressure level for opening the valve 10, it is possible to ensure a continuous transition from the curl curve (first phase) to the curved curve (second phase), and to avoid a break in the curve and too fast expansion. At point b of the graph, the spring 18 starts to act, moving the disk 12 so that the cross-sectional area of the gas outlet hole increases gradually, due to which the formation of a fracture on the curve becomes impossible. The time period can be varied within the range of 0, s, l o to reach atmospheric pressure along the curve oE, the section of the BLC has a duration of about 1.5 seconds and is a straight line. This region be can be considered tangent to segment ab. The regulating device can be made in the form of a throttle valve 19 (Fig. 3) or in the form of a valve 20 with a pusher driven by a toothed rack 21 (Fig. K). The speed of moving the valve can be adjusted using the central controller 22,
    Figg
    权利要求:
    Claims (6)
    [1]
    1. The method of sealing molding material, including dispensing molding sand, sealing it with a gas explosion pressure in a closed volume and reducing gas pressure, characterized in that, with 1 goal of increasing the uniformity of compaction and obtaining a smooth surface on the upper side of the form, reducing gas pressure from maximum up to pressure, ensuring the conditions for non-loosening of the compacted mixture, is carried out according to a hyperbolic law, and then, before reaching atmospheric pressure, linearly.
    £ 2
    SC 1019994
    >
    one
    1019994
    [2]
    2. The method according to π, 1, characterized in that the process of reducing the pressure from the pressure, ensuring the condition of non-loosening of the compacted mixture, to atmospheric pressure is carried out for 0.5 ”1.5 s,
    [3]
    3. A device for compacting the molding material, containing a model-tooling, a camera installed on it with a gas supply and ignition system and an exhaust hole, characterized in that, in order to increase the uniformity of the seal and to obtain a smooth surface on the upper side of the mold, it is provided set to
    exhaust port means for regulating pressure.
    [4]
    4. The device according to p. 3, characterized in that the means for regulating the pressure is made in the form of a hollow sleeve and valve e with a central hole connected to each other through an elastic element.
    [5]
    5. The device according to p. 3 "about the t that is due to the fact that the means for regulating the pressure having executed the form of a throttle valve,
    [6]
    6. The device according to p. 3, characterized in that the means for regulating the pressure is made in the form of a shock valve.
    类似技术:
    公开号 | 公开日 | 专利标题
    SU1019994A3|1983-05-23|Method and apparatus for compacting molding material
    SU980605A3|1982-12-07|Method and apparatus for compacting granular materials
    US4958674A|1990-09-25|Full mold casting process and device
    GB1094866A|1967-12-13|Mould purging apparatus and method
    RU1838036C|1993-08-30|Distributing device used in the process of continuous steel casting
    US4546810A|1985-10-15|Method for the manufacture of molds using casting sand or another mixture of raw material particles
    GB2079654A|1982-01-27|Moulding method and apparatus
    ES430765A1|1976-10-16|Method for pressure casting
    JPS589757A|1983-01-20|Controlling method for charging of molten steel in continuous casting
    JPS551905A|1980-01-09|Method and apparatus for shaping refrigerated mold
    JPS61239917A|1986-10-25|Expansion injection molding method
    SU1708493A1|1992-01-30|Method and apparatus for compaction of molding sand
    CA1176027A|1984-10-16|Method and apparatus for dosing the fuel supply forcombustion packing of foundry sand moulds
    SU1282953A1|1987-01-15|Pulse head
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    RU2163543C2|2001-02-27|Wedge shock-wave gas dynamic installation for concrete moulding
    SU494687A1|1975-12-05|The method of control and regulation of the process of vibropatching cell mixture
    KR100304316B1|2001-11-22|Magnesium molten metal supply device
    JPS5742369A|1982-03-09|Atomizer
    SU430956A1|1974-06-05|
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    SU933189A1|1982-06-07|Pulse head
    SU699172A1|1979-11-25|Apparatus for breaking-up rock with pulsed jets of high-temperature gas
    JPS576026A|1982-01-12|Support frame for manhole cover
    SU1458066A1|1989-02-15|Method of producing sand moulds
    同族专利:
    公开号 | 公开日
    NO803671L|1980-12-04|
    AU545573B2|1985-07-18|
    ZA801794B|1981-07-29|
    CH640757A5|1984-01-31|
    BR8008172A|1981-03-31|
    AU5989880A|1980-10-22|
    JPS56500362A|1981-03-26|
    DK516380A|1980-12-03|
    EP0017131A1|1980-10-15|
    WO1980002121A1|1980-10-16|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US1465342A|1921-02-28|1923-08-21|Donald J Campbell|Automatic-exhaust-valve construction|
    US3170202A|1962-08-22|1965-02-23|Sr William J Huston|Foundry process|
    DE2128371A1|1971-06-08|1972-12-28|Dynamit Nobel Ag, 5210 Troisdorf|Process for compacting granular materials by means of explosion pressure|
    DE2242812B2|1972-08-31|1977-06-23|Hüttenes-Albertus Chemische Werke GmbH, 4000 Düsseldorf|PROCESS FOR CURING ACID-CURABLE MOLDING MIXTURES|DE3025993C2|1980-07-09|1983-11-10|Sintokogio, Ltd., Nagoya, Aichi|Molding device for explosive compression of a sand-like filler material|
    EP0062331A1|1981-04-02|1982-10-13|BMD Badische Maschinenfabrik Durlach GmbH|Method and apparatus for pneumatically compacting moulding sand|
    DE3149172A1|1981-12-11|1983-06-30|Georg Fischer AG, 8201 Schaffhausen|"METHOD FOR PRODUCING MOLDED BODIES USING GAS PRESSURE"|
    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|
    ES2006861A6|1988-03-21|1989-05-16|Lopez Foronda Fernandez Vicent|Improvements introduced in airvessels for molding by expansive waves.|
    DE19957800B4|1999-11-18|2004-03-11|Hottinger Maschinenbau Gmbh|Process for the production of molds|
    DE202018107002U1|2018-04-12|2019-03-14|Krämer + Grebe GmbH & Co. KG Modellbau|Apparatus for producing cores from molding material|
    DE102019116531B3|2019-06-18|2020-03-26|Krämer + Grebe GmbH & Co. KG Modellbau|Device for the production of cores from molded material|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    CH312479A|CH640757A5|1979-04-04|1979-04-04|METHOD AND DEVICE FOR COMPRESSING MOLDING MATERIALS.|
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