EP0497650B1 - Vorrichtung und Verfahren zur Herstellung von granuliertem Material - Google Patents

Vorrichtung und Verfahren zur Herstellung von granuliertem Material Download PDF

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Publication number
EP0497650B1
EP0497650B1 EP92400134A EP92400134A EP0497650B1 EP 0497650 B1 EP0497650 B1 EP 0497650B1 EP 92400134 A EP92400134 A EP 92400134A EP 92400134 A EP92400134 A EP 92400134A EP 0497650 B1 EP0497650 B1 EP 0497650B1
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EP
European Patent Office
Prior art keywords
grate
boxes
pattern
box
plates
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.)
Expired - Lifetime
Application number
EP92400134A
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English (en)
French (fr)
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EP0497650A1 (de
Inventor
Jean-Jacques Mazeran
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MAZERAN JEAN JACQUES
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MAZERAN JEAN JACQUES
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Publication of EP0497650A1 publication Critical patent/EP0497650A1/de
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/02—Sand moulds or like moulds for shaped castings
    • B22C9/03—Sand moulds or like moulds for shaped castings formed by vacuum-sealed moulding

Definitions

  • the subject of the present invention is a device and a method for continuously manufacturing foundry molds made of granular material.
  • French patent application No. 2,307,596 describes a frame of foundry molds, in which there is provided a means for introducing and recovering the granular material used.
  • This means consists of a volume of substantially frustoconical shape, the small base of which is provided with a hatch through which the filling tube can be introduced; this hatch is airtight and remains closed throughout the period of use of the chassis. After molding, the vacuum is broken, the chassis being turned over, and the hatch opens, letting the material flow by gravity.
  • Such a device and such a method confer, on molding, only slow rates, because it is necessary to carry out numerous handling operations. Furthermore, the casting takes place with the mold held in the assembly of the two chassis, which immobilizes two expensive chassis for obtaining a single mold. Likewise, it is necessary to carry out the shaping operation twice to obtain the upper and lower parts of the mold, this double operation leading to obtaining a complete mold.
  • the device in question is distinguished from the similar ones by the fact that 'It consists of at least two model plates, placed in the corresponding housings of a support, and at least one sealing plate and a frame comprising two faces.
  • the model plate support elements and the sealing plates are hinged together.
  • the polymer sheet is unique and corresponds to the surface of the sealing plates and the model plates.
  • the process essentially consists of preparing the model plates in the support, placing on them a polymeric envelope by thermoforming and aspiration through the plates, placing the model plates around of a reinforcement comprising, at most, three faces, to ensure the seal between the polymer envelope and the reinforcement, by clamping the film between reinforcement and plates, or by plating thereof on the reinforcement by inflation d '' a joint, to ensure the filling with granular material, to assemble, by welding, the ends of said envelope, over the upper frame, to evacuate the space delimited by the polymeric envelope through of the armature, to remove the plates and to assemble the lumps, thus obtained, for the constitution of imprints.
  • This process and this device make it possible to obtain movements with reduced handling.
  • only the reinforcement and the polymeric envelope are used at the casting station and the reinforcement is much simpler than the chassis previously used, hence a fairly reduced investment.
  • a single operation makes it possible to obtain the two parts of a mold, which therefore improves the yield by almost 50%.
  • the process is semi-continuous, but the casting can be continuous, by juxtaposing the lumps. The number of parts required is reduced, as is the volume of granular material used.
  • the device and the method according to the invention aim to remedy these drawbacks by proposing a support for model plates with sliding and pivoting boxes, connected to a vacuum source, capable of pressing against the frame, after interposition of a polymer film, with plating, in superposition, of the upper ends thereof against the top of the frame, under the effect of air pressure and depression.
  • the device according to the invention is characterized mainly by the fact that the support for model plates consists mainly of two boxes, with two compartments, each connected to a source of vacuum, capable of sliding and pivoting. 'towards each other, relative to a frame surrounding a vibrating table on which is placed a three-sided frame, connected to the vacuum source.
  • each box is made to the dimensions of a model plate, which ensures closing by embedding in a rebate provided for this purpose in the edge of the opening of said box.
  • each box is completely closed and has, in its wall located in the extension of the model plate, air passage holes.
  • the width of the small compartment is determined according to that of the frame and corresponds approximately to 2/3 of it.
  • the boxes slide and pivot by means of two pins, arranged laterally in the median plane of each box, and of lights, forming slides, arranged at the upper part of the frame.
  • the frame is formed of the three faces of a rectangular parallelogram, the upper face of which is absent, the vertical faces of which, connected by a hollow central rib covered with a microperforated filter, each comprise, in addition to a filtering device, a mouthpiece vacuum, equipped with a non-return valve, a handling pin, a support shoe, for clamping on the vibrating table, and a machined surface, intended to serve as a geometric reference for the molded parts.
  • the figures represent a device for the continuous production of foundry molds in granular material, according to the invention, comprising a frame 10 with lights 11 , supporting, by means of pins 31 , 41 , boxes 30 and 40 at large compartments 32 , 42 with rebates 321 , 421 , in which the model plates 50 , 60 fit, and with small compartments 33 , 43 with air passage orifices 331 , 431 ; said boxes being connected to a vacuum source, respectively, by flexible pipes 322 , 422 and 332 , 432 central, by solenoid valves 323 , 423 , 333 , 433 ; the assembly being arranged around a frame 70 with faces 71 , 72 , 73 , connected by a hollow rib 74 with a microperforated filter 741 , placed in communication with the vacuum source by means of a nozzle 75 , provided with trunnions handling 76 , support shoes 77 and a machined surface 78 .
  • pins 31 and 41 on the sides of the boxes 30 and 40 and the introduction of these into the slots 11 of the frame 10 allow, as shown in FIGS. 2 to 4, easy tilting and sliding of the boxes 30 and 40 supporting the model plates 50 and 60 , which allow their approximation or their spacing relative to the frame 70 resting, by its base 73 , on the vibrating table 80 .
  • the ends 911 and 921 of the polymer films can be folded over the upper part 101 of the clod 100 made of granular material, with superimposition of the edges before application of the vacuum in the hollow rib 74 of the frame by means of the end pieces 75 , and after the vibrating table is put into operation, following the filling of the gap between model plates with granular material.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Devices For Molds (AREA)
  • Mold Materials And Core Materials (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Claims (7)

  1. Vorrichtung zur Herstellung von Gußformen insbesondere aus granuliertem Material, bestehend aus Modellplatten, Dichtungsplatten, einer Armierung, mindestens einer Polymer-Hülle, einem Mittel zum Zuführen von granuliertem Material sowie Mitteln zum Unter-Vakuum-Setzen, die aus mindestens zwei Modellplatten bestehen, die in den Aufnahmen eines Halters angeordnet sind, wobei die Armierung außerdem drei Seiten hat, dadurch gekennzeichnet, daß der Halter der Modellplatten (50, 60) im Prinzip aus zwei Kästen (30, 40) mit zwei Abteilen (32, 42 und 33, 43) besteht, die jeweils mit einer Vakuumquelle verbunden sind und zueinander an einem Gestell (10) gleiten und kippen können, das einen Vibriertisch (80) umgibt, auf dem eine Armierung (70) mit drei Seiten (71, 72, 73) angeordnet ist, die mit der Vakuumquelle verbunden ist.
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß das große Abteil (32, 42) jedes Kastens (30, 40) mit den Maßen einer Modellplatte (50, 60) ausgeführt ist, die dessen Verschließen durch Einfügen in einen Falz (321, 421) gewährleistet, der hierzu im Rand der Öffnung des genannten Abteils (32, 42) vorgesehen ist.
  3. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß das kleine Abteil (33, 43) jedes Kastens (30, 40) vollkommen geschlossen ist und in seiner sich in der Verlängerung der Modellplatte befindlichen Wandung Luftdurchlaßöffnungen (331, 431) aufweist.
  4. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß die Breite des kleinen Abteils (33, 43) jedes Kastens (30, 40) ungefähr 2/3 der Breite der Armierung (70) entspricht.
  5. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Kästen (30, 40) mittels zweier Drehzapfen (31, 41), die seitlich in der mittleren Ebene jedes Kastens (30, 40) angeordnet sind, und mittels waagerechter Langlöcher (11), die Schienen bilden und im oberen Teil des Gestells (10) ausgeführt sind, gleiten und kippen.
  6. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Armierung von drei Seiten (71, 72, 73) eines rechtwinkligen Parallelogramms gebildet wird, dessen Oberseite fehlt, und dessen senkrechte Seiten (71, 72), die durch eine zentral angeordnete, von einem mikroperforierten Filter (741) bedeckte Hohlrippe (74) verbunden sind, jeweils neben einer Filtervorrichtung noch einen Vakuumanschluß (75) mit einem Rückschlagventil, einen Haltezapfen (76), einen Tragschuh (77) zum Anflanschen auf dem Vibriertisch und eine bearbeitete Fläche (78), die als geometrische Bezugsfläche für die Gußstücke dienen soll, aufweisen.
  7. Verfahren zur Anwendung der Vorrichtung nach den Ansprüchen 1 bis 6, dadurch gekennzeichnet, daß es im Prinzip darin besteht, nachdem das Gestell (10) um den Vibriertisch (80) herum angeordnet wurde, :
    - die Kästen in waagerechte Position zu bringen,
    - eine Modellplatte (50, 60) in jeden der Falze (321, 421) der großen Abteile jedes Kastens (30, 40) einzusetzen,
    - auf jeder Modellplatte (50, 60) einen Kunststoffilm (91, 92) wärmezuformen, der über jedes kleine Abteil (33, 43) hinausragt,
    - die beiden Abteile jedes Kastens durch Einwirken auf die Elektroventile (323, 423, 333, 433) mit der Vakuumquelle zu verbinden,
    - ggf. auf der Oberfläche jedes Films (91, 92) ein Trennmittel zu zerstäuben,
    - die Armierung (70) auf dem Vibriertisch (80) anzuordnen, nachdem die Kästen auseinanderbewegt und dann in senkrechte Position geschwenkt wurden,
    - die Modellplatten durch Gleiten der Drehzapfen (31, 41) der Kästen (30, 40) in den Langlöchern (11) des Gestells (10) an die Armierung anzulegen.
    - die Kästen (30, 40) mit dem Vibriertisch (80) fest zu verbinden, entweder direkt oder mit einem Zwischengestell (nicht dargestellt),
    - den freigelassenen Raum zwischen den beiden Modellplatten (50, 60) mit einem granulierten Material zu füllen, wobei der Vibriertisch in Betrieb ist,
    - die kleinen Abteile (33, 43) jedes Kastens (30, 40) durch Einwirken auf die Elektroventile (333, 433) unter atmosphärischen Druck setzen.
    - jedes der Enden des Kunststoffilms, das ein kleines Abteil des Kastens bedeckte, auf die Oberseite des Sandklumpens umzuschlagen,
    - die Hohlrippe (74) der Armierung mit der Vakuumquelle zu verbinden, um das Steifwerden des Klumpens zu erreichen,
    - das Vakuum in den großen Abteilen (32, 42) der Kästen (30, 40) mittels der entsprechenden Elektroventile (323, 423) zu beenden und jene zurückzubewegen, um die Armierung freizugeben,
    - den Sandklumpen zur Gußzeile hin herauszunehmen, wobei die Armierung unter Unterdruck gehalten wird,
    - die Kästen (30, 40) für einen neuen Arbeitszyklus wieder in waagerechte Position zu bringen.
EP92400134A 1991-02-01 1992-01-20 Vorrichtung und Verfahren zur Herstellung von granuliertem Material Expired - Lifetime EP0497650B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9101180 1991-02-01
FR9101180A FR2672233B1 (fr) 1991-02-01 1991-02-01 Dispositif et procede de fabrication de moules de fonderie en materiau granulaire.

Publications (2)

Publication Number Publication Date
EP0497650A1 EP0497650A1 (de) 1992-08-05
EP0497650B1 true EP0497650B1 (de) 1994-07-27

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ID=9409295

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92400134A Expired - Lifetime EP0497650B1 (de) 1991-02-01 1992-01-20 Vorrichtung und Verfahren zur Herstellung von granuliertem Material

Country Status (7)

Country Link
US (1) US5219014A (de)
EP (1) EP0497650B1 (de)
JP (1) JP2740702B2 (de)
AT (1) ATE109045T1 (de)
DE (1) DE69200262T2 (de)
ES (1) ES2061318T3 (de)
FR (1) FR2672233B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102009135A (zh) * 2010-12-01 2011-04-13 张和啟 一种双桥汽车平衡悬架支座真空负压成型方法
CN102009136A (zh) * 2010-12-01 2011-04-13 张和啟 一种双桥汽车平衡悬架板簧座真空负压成型方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2741520A1 (fr) * 1995-11-27 1997-05-30 Podia France Sarl Appareil d'empreintes plantaires, vibrant, a masses granuleuses

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2305229C3 (de) * 1972-02-04 1975-04-17 Sintokogio, Ltd., Nagoya, Aichi (Japan) Formkasten
DE2352492B2 (de) * 1973-10-19 1977-08-25 Wittmoser, Adalbert, Prof Dr-Ing, 6840 Lampertheim Verfahren zur herstellung von durch unterdruck stabilisierten, hohlen giessformen
DE2516158C3 (de) * 1975-04-14 1978-06-22 Heinrich Wagner Maschinenfabrik, 5928 Laasphe Formkasten für vakuumgebundene Gießformen
DE3318112A1 (de) * 1983-05-18 1984-11-22 Achinger, Michael, 8900 Augsburg Verfahren und vorrichtung zum herstellen von giessformen
FR2618358B1 (fr) * 1987-07-22 1991-01-18 Mazeran Jean Jacques Procede et dispositif de fabrication de moules a partir de materiau granulaire

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102009135A (zh) * 2010-12-01 2011-04-13 张和啟 一种双桥汽车平衡悬架支座真空负压成型方法
CN102009136A (zh) * 2010-12-01 2011-04-13 张和啟 一种双桥汽车平衡悬架板簧座真空负压成型方法

Also Published As

Publication number Publication date
ATE109045T1 (de) 1994-08-15
DE69200262D1 (de) 1994-09-01
FR2672233A1 (fr) 1992-08-07
JPH04313444A (ja) 1992-11-05
JP2740702B2 (ja) 1998-04-15
US5219014A (en) 1993-06-15
ES2061318T3 (es) 1994-12-01
DE69200262T2 (de) 1995-03-09
EP0497650A1 (de) 1992-08-05
FR2672233B1 (fr) 1993-05-07

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