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EP0139119B2 - Procédé et installation pour la compression de matériaux de moulage en forme de grain, par exemple sable de fonderie - Google Patents
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EP0139119B2 - Procédé et installation pour la compression de matériaux de moulage en forme de grain, par exemple sable de fonderie - Google Patents

Procédé et installation pour la compression de matériaux de moulage en forme de grain, par exemple sable de fonderie Download PDF

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Publication number
EP0139119B2
EP0139119B2 EP84108988A EP84108988A EP0139119B2 EP 0139119 B2 EP0139119 B2 EP 0139119B2 EP 84108988 A EP84108988 A EP 84108988A EP 84108988 A EP84108988 A EP 84108988A EP 0139119 B2 EP0139119 B2 EP 0139119B2
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Prior art keywords
pressure
piston
valve
bottom plate
frame
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EP84108988A
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German (de)
English (en)
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EP0139119B1 (fr
EP0139119A1 (fr
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Josef Mertes
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Individual
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Individual
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Priority to AT84108988T priority Critical patent/ATE37305T1/de
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Publication of EP0139119B1 publication Critical patent/EP0139119B1/fr
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C15/00—Moulding machines characterised by the compacting mechanism; Accessories therefor
    • B22C15/28—Compacting by different means acting simultaneously or successively, e.g. preliminary blowing and finally pressing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C15/00—Moulding machines characterised by the compacting mechanism; Accessories therefor

Definitions

  • the invention relates to a method according to the preamble of claim 1 and an apparatus for carrying out the method according to the preamble of claim 6.
  • the known devices with the compressed air method have the disadvantage that the compressed air hits the loose molding material surface selectively and not evenly frontally.
  • DE-A-3 105 350 e.g. Measures are described which are intended to deliberately separate the partial flows of the Laval nozzles arranged in a coarse-meshed grid.
  • the partial flows which are bundled according to the Laval characteristics, hit the loose molding material at certain points and tear deep craters there, which can reveal high-lying model parts. In addition to the churned crater-like surface of the back of the mold, this also leads to uneven compaction.
  • EP-A-36 434 describes an airflow pressing method in which compressed air is blown into the molding material and sucked off again on the model plate.
  • the compressed air is blown in above the surface of the molding material via channels with "sand filter nozzles", which are known to be only the smallest Have cross sections.
  • the sand filter nozzles cause the compressed air flowing from a central outlet to accumulate, in order to then allow it to flow out evenly from the sand filter nozzles.
  • the horizontal and vertical as well as the opposite arrangement of the sand filter nozzles result in considerable energy losses. Since the flow-through process can only take place relatively slowly, the use of the potential compressed air energy for a sudden compression is not possible. With this method, therefore, only a pre-compression but no final compression can be achieved. Mechanical re-pressing is therefore imperative. It is also disadvantageous that the model plate has to be equipped with sand filter nozzles to extract the compressed air and that a vacuum source is also required.
  • the molding material mass is accelerated and compressed by subsequent braking on the model plate.
  • the ideal characteristic for casting technology has the disadvantage that the back of the mold does not meet the requirements of practice, particularly with regard to pouring pots and pouring funnels.
  • An integrated device is therefore required which eliminates this disadvantage without, however, significantly influencing the advantageous shape hardness curve. It would be advantageous if this same device also slightly presses the loose molding material surface before the pressure is applied. This on the one hand reduces the air pore volume in the loose surface of the molding material and on the other hand reduces the penetration of the compressed air into the molding material.
  • the device described above is not available in the previously known devices with the compressed air method.
  • the object of the present invention is to avoid the disadvantages described and to propose a method and a device with which a frontal, uniform and perpendicularly acting pressure wave is generated which uniformly compresses the molding material at high speed and which has an integrated device for pretreatment and aftertreatment the back of the mold.
  • the method according to the invention can be used in particular in the foundry for the compression of molds and cores, and in the construction industry for the compression of building materials. In addition, the method according to the invention can also be used for the compression of any other molding materials.
  • the base plate 54 which has a large number of small, circular openings 53 with cross sections similar to Laval nozzles.
  • the base plate 54 is a component of the compressed air chamber 17 arranged above it.
  • the compressed air chamber 17 is connected to the two symmetrically arranged wind boilers 43 via the generously dimensioned lines 42 in order to increase the output volume.
  • the pressure in the compressed air chamber is 5 bar.
  • the air-permeable frame 45 which carries the elastic valve tappets 52, 65, is located in the compressed air chamber 17.
  • the generously dimensioned bores 14, 57, 67 in the frame 45 enable the compressed air to flow without throttling.
  • the elastic valve lifters 52, 65 close the openings 53 in the base plate 54.
  • the frame 45 is fastened to the piston 41.
  • the piston 41 which causes the opening and closing of the base plate openings 53, slides in a cylinder, the lower space 21 of which is an integral part of the compressed air chamber 17.
  • the piston cavity 20 is an integral part of the compressed air chamber 17.
  • a vertically movable flange 11 is suspended from four pneumatic cylinders 44 on the outer edge of the housing 15.
  • the pneumatic cylinders are under constant pressure on the piston side and thus act as a pneumatic spring. In the starting position, the pistons are against the stops 16 pressed.
  • the flange 11 has the task of producing a pressure-tight connection between the housing 15 and the filling frame 8 with its seals 9 and 13.
  • the seal 9 is a static seal, while the seal 13 can be activated with compressed air. In the non-activated state, the seal 13 withdraws behind the inner surface of the flange and the housing 15 can be moved through the flange 11 without contact with the play 46. In the activated state, the seal 13 is pressed against the outer wall of the housing 15.
  • Fig. 1 left half section shows the device in the starting position.
  • the model plate 5 with model 5a, molding box 7 and filling frame 8 is moved over the roller conveyor 4 under the base plate 54.
  • the molding material 6 is loosely and evenly piled up to the surface 50.
  • the model plate 5 is lifted off the roller conveyor 4 and with the further upward movement the filling frame 8 is pressed under the flange 11, which is then also moved upwards against the pneumatic spring pressure 44.
  • the upward movement is carried out until the base plate 54 has slightly pressed the loose molding material surface 50 to reduce its air pore volume.
  • the loose molding material surface 50 is then brought into a defined distance 49 from the base plate 54 by a downward movement (firing position). However, it is also possible to dispense with gently pressing the surface of the molding material.
  • the upward movement is then carried out directly up to the defined distance 49 (shot position).
  • Fig. 1 right half section shows the device in the firing position, "firing" means the sudden escape of the compressed air.
  • the seal 13 is first activated.
  • the pneumatic spring pressure 44 presses the seal 9.
  • this pneumatic spring pressure counteracts the force which is created by the pressure acting on the gap 48.
  • the system is then sealed pressure-tight and the compression of the pressure waves can be released.
  • the housing of the compressed air chamber 17 is connected via the head frame 22, the columns 55, the base frame 1 and the cylinder 2 to the lifting table 3 to form a non-positive system.
  • the compression of the molding material decreases slightly in the course of the surface 51 because the molding material mass and thus the mass energy decrease and because the upper layers of the molding material are no longer braked directly on the rigid model plate but in the intermediate layers of the molding material.
  • the valve 12 is opened after the bottom plate openings 53 have been closed. The residual pressure above the molding material surface 51 is again increased to the system pressure 6 bar and this is kept as a static pressure above the molding material surface 51 for a short time.
  • the space between base plate 54 and molding surface 51 is depressurized again via valve 10.
  • Another possibility of post-compaction is that the molding material surface 51 is pressed against the base plate 54 by means of a lifting table 3. This is done by previously releasing the residual pressure above the molding material surface 51 through the valve 10 and releasing the seal 13.
  • the effective pressing surface 59 between the openings 53 is approximately 50% of the total molding surface 51.
  • the lifting table is lowered again, as a result of which the model plate 5 with model 5a, molding box 7, filling frame 8 and the compacted mold is again placed on the roller conveyor 4.
  • the model plate 5 with the units lying on it is moved out.
  • the other half of the model is moved under the base plate 54 from the opposite side and a new compression cycle begins when the lifting table 3 is raised.
  • the sum of the cross-sectional areas 47, 60 and the cross-sectional area of the piston 41 together form a differential piston system.
  • the cross-sectional area of the piston 41 is greater than the sum of all cross-sectional areas 47, 60.
  • the same pressure values of the compressed air chamber 17 are present in the cylinder chambers 21 and 24 and above the valve tappets 52. This results in a resultant force which the valve lifters 52, 65 press onto their seat. This force corresponds to the product of the sum of all cross-sectional areas 47, 60 and the pressure of the compressed air chamber 17. If the pressure in the cylinder chamber 24 is released to atmospheric pressure, an upward force results because the cross-sectional area of the piston 41 is larger than that Sum of all cross-sectional areas 47, 60.
  • this force corresponds to the product of the differential cross-sectional area and the pressure of the compressed air chamber.
  • this force increases because the entire cross-sectional area of the piston 41 becomes effective through the release of the valve tappet.
  • the pressure decreases from 5 bar to approx. 3.5 bar in accordance with the volume ratios and the adiabatic curve.
  • the area ratios are designed in such a way that a force is available at the start of the stroke of the valve lifter, which ensures that the dead weight and the friction are overcome as well as the required acceleration. The further increase in force can thus cause an additional acceleration, which in turn is important for the rapid opening.
  • the piston sliding surfaces 18 and 23 are provided with guide bands which have a very low coefficient of friction and are highly wear-resistant. They also prevent metallic contact between the piston and cylinder material. Seals are not required on the piston sliding surfaces 18 and 23 because the piston 41 is acted upon on both sides by the same system pressure when the openings 53 are closed.
  • a spring damper 39 is installed in the cylinder space 24, which brings the piston 41 to a standstill over a defined braking distance.
  • a correspondingly resilient plastic disk 40 is applied to the piston surface, which prevents the piston from striking metal onto the surface of the spring damping 39.
  • the guides 56 which can also be designed as rollers, prevent the frame 45 from rotating. They are set with a slight play so that the lifting movement of the frame is not hindered.
  • the valve lifters 52, 65 consist of an elastic material 64 (eg rubber) which is vulcanized onto a steel core 63.
  • the steel core 63 and the screw head 62 support the elastic material against the outward system pressure.
  • the surfaces 68 and 61, 70 run exactly plane-parallel.
  • the length 69 of the valve lifters 52, 65 corresponds to this plane-parallel distance within a defined tolerance range. Tolerance differences are adjusted by the elasticity of the valve lifters.
  • the exact length 69 is manufactured within the specified tolerance range.
  • the rubber mass 64a represents a spring compressed by the locking force, which with its pretension assists the lifting of the piston 41 and the frame 45 during the opening process and which also causes the valve lifters 52, 65 to be lifted off the valve seat at a defined initial speed greater than zero.
  • valve lifters 52, 65 To replace the valve lifters 52, 65, the lower housing part 15 is released on the quick-release fastener 19 and lowered with the lifting table 3 and by means of a simple one Pallet moved away laterally over the roller conveyor 4. The valve lifters 52, 65 are then freely accessible from below.
  • the compressed air is fed from the network with the nominal pressure 6 bar via the shut-off valve 27 and the filter 26. From there, the working air is fed to the two wind boilers 43 via the valve 30 and the pressure regulator 31. The control air is removed behind the compressed air lubricator 29 and fed to the cylinder chamber 24 via the valves 32 and 34.
  • the quick breather valves 36 are used for quick ventilation of the cylinder space 24.
  • the valve 12 is used for the post-compression of the molding material surface 51 and the valve 10 is used for relieving the space above the molding material surface 51.
  • Valve 37 is the main safety valve. With the pressure control valve 31, the working pressure is kept at 5 bar.
  • valve 34 In the starting position, valve 34 is open when de-energized (safety circuit), valve 32 is closed when de-energized, and valve 30 is opened when current is applied.
  • the valves 10, 12 and 28 are closed when de-energized.
  • the pressure of the compressed air chamber 17 and the air boiler 43 is present in the cylinder chamber 24 via the check valve 33, the valve 34 and the quick exhaust valves 36.
  • the piston 41 is pressed down and the valve tappets 52, 65 thus close the openings 53.
  • valve 28 When the device is in the firing position, the valve 28 is first switched and thus the seal 13 is activated. Thereafter, valve 34 is turned on and valve 30 is turned off. The valve 30 interrupts the further supply of the working air.
  • the valve 34 interrupts the supply of the control air and at the same time relieves the pressure on the quick-breather valves 36.
  • the cylinder space 24 is relieved in a very short time via a large and throttle-free cross-section of the quick-breather valves 36 and the downstream silencers 35.
  • the piston 41 lifts the valve lifters 52, 65 and the base plate openings 53 are released in a few milliseconds.
  • the compressed air emerges from the compressed air chamber and - as already described - compresses the molding material.
  • the pressure drops in accordance with the change in volume and taking into account the adiabatic curve from 5 bar to approx. 3.5 bar. After the pressure wave compression, the valves 32 and 34 are opened.
  • the piston 41 is moved downwards with the network pressure of 6 bar and the valve tappets 52, 65 close the openings 53 again.
  • the valve 12 is opened for a short time for subsequent compression.
  • the valve 32 is closed and the valve 30 is opened, as a result of which the compressed air chamber 17 and the air boiler 43 are brought back to the initial pressure of 5 bar and the cylinder chamber 24 is switched again from the 6 bar system to the 5 bar system of the compressed air chamber 17 .
  • the valve 10 is opened briefly. Then the seal 13 is relieved via the valve 28.
  • the compaction process has ended and the lifting table 3 can lower the model plate 5 back onto the roller conveyor 4.
  • FIG. 7 shows an embodiment variant that can be used with particularly large surfaces of molding material.
  • the outlet openings 71 are dimensioned accordingly large and each valve tappet 73 has its own drive piston 75.
  • Valve tappet 73 and drive piston 75 together form a differential piston system with the same mode of operation as described on page 8.
  • a ball joint suspension 74 with a small, all-round angular stop ensures that the large-area valve disk 73 rests plane-parallel on the sealing surface 72.
  • the conical hoods 76 reduce the flow resistance.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Devices For Molds (AREA)
  • Mold Materials And Core Materials (AREA)

Claims (21)

  1. Processus en vue de serrer des demi-produits moulés granuleux, par ex. du sable de fonderie
    (a) par une onde de pression d'agent gazeux, par exemple de l'air comprimé, agissant à grande vitesse sur la surface du demi-produit moulé en vrac,
    (b) sur lequel l'agent de pression sort régulièrement de buses semblables à des tuyères de Laval les unes à côté des autres donnant sur un système de grille,
    (c) qui sont disposées dans une plaque de fond (54) au-dessus de toute la surface (50) des demi-produits moulés,
    (d) les ouvertures (53) des buses étant fermées avant le serrage par un poussoir disposé dans un cadre (45) fixé à un piston (41) et les poussoirs (52, 65) étant soulevés pour l'introduction du serrage,
    (e) en utilisant des poussoirs de soupapes (52,65) en un matériau élastique, par exemple du caoutchouc, lesquels soutiennent le soulèvement du piston (41) en raison de leur effet ressort, ce qui fait que l'inertie de la masse du piston et du cadre est surmontée avant que les poussoirs ne soient soulevés du siège de soupape à une vitesse de départ définissable et
    (f) que chaque jet d'air éclate à la sortie des buses de telle sorte que
    (g) les jets d'air sortant les uns à côté des autres se mélangent et
    (h) agissent verticalement et qu'ils arrivent à tous les endroits régulièrement comme une onde de pression sur la surface (50) du demi-produit moulé en vrac.
  2. Procédé selon la revendication 1 se caractérisant par le fait que la plaque de fond (54) et/ou la surface du matériau de moulage disposé en vrac (50) - cette dernière action étant provoquée par la plaque-modèle (5) - peuvent être mines l'une par rapport à l'autre en direction verticale.
  3. Procédé selon les revendications 1 et 2 se caractérisant par le fait que la surface (50) du matériau de moulage disposé en vrac peut être légèrement comprimée par la plaque de fond (54) avant la mise en oeuvre de l'onde de compression, afin de réduire les cavités d'air qui s'y trouvent.
  4. Procédé conformément aux revendications 1 et 2 se caractérisant par le fait que la plaque de fond (54) est portée à une distance déterminée (49) par rapport à la surface (50) du matériau de moulage disposé en vrac, avant la mise en oeuvre de l'onde de compression afin d'obtenir une configuration frontale uniforme de l'onde de compression.
  5. Procédé conformément aux revendications 1 et 2 se caractérisant par le fait qu'après la compression de l'onde de pression, une couche de surface (51) fine et un peu moins compressée puisse être soumise à une recompression, et ce par l'intermédiaire de la recompression par la plaque de fond (54) et/ou par l'augmentation de la pression du gaz au-dessus de la surface solide du matériau de moulage (51).
  6. Dispositif pour l'exécution du procédé selon la revendication 1, comprenant une table (3) pour poser une plaque-modèle (5) qui supporte un cadre de moulage (7) et un cadre de remplissage (8), le tout surmonté d'une chambre à gaz comprimé (17), et une plaque de fond (54) comportant des orifices (53) proches les uns des autres et aménagés dans un système de trame en tant que composante de la chambre à gaz comprimé (17), se caractérisant par le fait que des poussoirs de soupapes (52, 65) élastiques referment les orifices (53) très proches les uns des autres dans le système de trame dans la plaque de fond (54), que ces poussoirs de soupapes (52, 65) sont fixés à un cadre (45) de rigidité flexionnelle et également perméable au gaz et que ce cadre (45) est fixé à un piston (41), directement soumis aux effets de la pression du gaz de la chambre a gaz comprimé (17) et que la surperficie de sa coupe transversale est supérieure à la somme de toutes les superficies transversales des orifices (47, 60) dans la plaque de fond (54).
  7. Dispositif selon la revendication 6 se caractérisant par le fait que le piston (41) provoquant l'ouverture et la fermeture des orifices (53) de la plaque de fond (54) est alimenté dans les deux directions par la pression du gaz dans la chambre à gaz comprimé (17) et que de la sorte, aucune source d'énergie extérieure n'est nécessaire.
  8. Dispositif selon les revendications 6 et 7, caractérisé par le fait que sous la détente rapide de la pression, qui ne dure que quelques millisecondes au niveau de l'espace (24) du vérin, le piston (41) est soulevé en quelques millisecondes par la pression gazeuse présente en tant qu'énergie potentielle dans l'espace (24) du vérin et sous l'effet d'élasticité produit par les poussoirs de soupapes élastiques (52, 65).
  9. Dispositif selon les revendications 6 à 8 caractérisé par le fait que les surfaces de glissement (18) et (23) des pistons peuvent être démunies de joints.
  10. Dispositif selon les revendications 6 à 9 se caractérisant par le fait que la cavité creuse (20) du piston et la cavité creuse (21) du vérin constituent des parties intégrantes de la chambre à gaz comprimé (17).
  11. Dispositif conformément à la revendication 6, caractérisé par le fait que les surfaces de joint (61) des poussoirs de soupapes élastiques (65) sont parallèles au plan de la surface intérieure (70) de la plaque de fond (54) afin que la course la plus petite (p.ex. d/4 d'un orifice circulaire (60)) permette d'obtenir une coupe transversale de sortie sans étranglement.
  12. Dispositif selon les revendications 6 et 11, caractérisé par le fait que la plaque de fond (54) présente un grand nombre d'orifices (53) ayant des sections analogues à des tuyères de Laval, disposés dans un système de trame à angles droits et présentant une configuration faisant crever facilement les jets d'air qui s'échappent à une vitesse supersonique au niveau des sorties des tuyères et que ces jets d'air s'entremêlent au cours de la distance définie (49) en formant ainsi une onde de compression frontale.
  13. Dispositif conformément aux revendications 11 et 12 caractérisé par le fait que le cadre (45) situé entre les poussoirs de soupapes (52, 65) évoluant sous ferme conique vers le haut, présente des orifices (14, 57, 67) d'une section supérieure à celle des orifices (47, 60) de la plaque de fond (54) et que les sections (58) entre les poussoirs de soupapes (52, 65) équivalent aux ouvertures (14, 57, 67) pratiquées dans le cadre (45) ou sont supérieures à celles-ci.
  14. Dispositif selon les revendications 6 à 13, caractérisé par le fait que le piston (41) ne doit effectuer qu'une course très minime (d/4 d'un orifice circulaire (47, 60)), pour pouvoir ouvrir toute la section de sortie dans la plaque de fond (54) sans aucun étranglement, ce qui est extrêmement important pour assurer l'indispensable ouverture rapide de l'ensemble de la section de sortie en quelques millisecondes.
  15. Dispositif selon les revendications 6, 11 et 12, se caractérisant par le fait que le cône de soupape (52, 65) est conçu en matériau élastique (64) par exemple en caoutchouc, fixé par vulcanisation sur un noyau en acier (63) et que la tête de vis (62) et le noyau en acier (63) soutiennent le matériau élastique (64) contre les effets de la pression de gaz mise en oeuvre.
  16. Dispositif conformément à l'une des revendications 6 à 15 se caractérisant par le fait qu'une bride (11) suspendue au niveau de la carcasse (15) assure une jonction étanche à la pression entre la carcasse (15) et le cadre de remplissage (8) et que cette bride (11) est pressée sur ledit cadre de remplissage (8) par un effet de ressort pneumatique (44).
  17. Dispositif selon la revendication 16, caractérisé par le fait que la bride (11) présente un joint d'étanchéité (9) par rapport au cadre de remplissage (8) ainsi qu'un joint d'étanchéité (13) par rapport à la carcasse (15).
  18. Dispositif selon les revendications 16 et 17, se caractérisant par le fait que le joint d'étanchéité activable (13) est ancré dans une gorge de la bride (11) et qu'à l'état non activé, grâce à son élasticité il se retire derrière la face intérieure de la bride, de sorte que la carcasse (15) peut être mue par cette bride sans aucun contact et avec un jeu bien défini.
  19. Dispositif selon l'une des revendications 6 à 18, se caractérisant par le fait qu'avec une dimension définie (49), la bride (11) peut être fixée définitivement à la carcasse (15) et ne comporte que le joint d'étanchéité (9).
  20. Dispositif selon les revendications 6 à 12, caractérisé par le fait que chaque poussoir de soupapes (73) peut également disposer de son propre piston de commande (75), selon les revendications 6 à 12, et que le poussoir de soupapes (73) conçu pour une large ouverture de sortie (71) est équipé d'une suspension de joints à rotules (74) ayant un déplacement angulaire de tous côtés, bien défini, présentant un appui plan et parallèle de la zone d'étanchéité (72).
  21. Dispositif selon la revendication 15, se caractérisant par le fait que la masse caoutchouteuse (64a - Fig.5) soutenue par la tête de vis (62) contre les effets de la pression de gaz mise en oeuvre, représente un ressort comprimé par l'effort de verrouillage, ressort qui - par sa précontrainte - renforce l'élévation du piston (41) et du cadre (45) lors du processus d'ouverture et qui a pour effet, par suite de la course élastique, que tout d'abord la masse du piston (41) et du cadre (45) se déplace vers le haut avant que les poussoirs de soupapes (52, 65) décollent du siège des soupapes avec une vitesse initiale définie supérieure à zéro, suite à quoi toute la section de sortie s'ouvre en quelques millisecondes.
EP84108988A 1983-08-02 1984-07-28 Procédé et installation pour la compression de matériaux de moulage en forme de grain, par exemple sable de fonderie Expired - Lifetime EP0139119B2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84108988T ATE37305T1 (de) 1983-08-02 1984-07-28 Verfahren und vorrichtung zum verdichten von kornfoermigen formstoffen z.b. giessereiformsand.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19833327822 DE3327822A1 (de) 1983-08-02 1983-08-02 Verfahren und vorrichtung zum verdichten von kornfoermigen formstoffen z.b. giessereiformsand
DE3327822 1983-08-02

Publications (3)

Publication Number Publication Date
EP0139119A1 EP0139119A1 (fr) 1985-05-02
EP0139119B1 EP0139119B1 (fr) 1988-09-21
EP0139119B2 true EP0139119B2 (fr) 1996-11-13

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EP84108988A Expired - Lifetime EP0139119B2 (fr) 1983-08-02 1984-07-28 Procédé et installation pour la compression de matériaux de moulage en forme de grain, par exemple sable de fonderie

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EP (1) EP0139119B2 (fr)
AT (1) ATE37305T1 (fr)
DE (2) DE3327822A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4673020A (en) * 1983-10-21 1987-06-16 Equipment Merchants International Inc. Foundry molding machine and method
DE3937254A1 (de) * 1989-11-09 1991-05-16 Badische Maschf Gmbh Einrichtung zum verdichten von giessereiformstoffen
AU644702B2 (en) * 1990-12-14 1993-12-16 Sintokogio Ltd. Compressed air blowing apparatus for use in green sand mold molding facility
DE19848048A1 (de) * 1998-10-19 2000-05-04 Josef Mertes Verfahren und Vorrichtung zum Verdichten von Formstoffen z. B. Gießerei-Formsand
RU2472600C1 (ru) * 2011-05-24 2013-01-20 Закрытое Акционерное Общество "Литаформ" Способ изготовления литейных форм и устройство для его осуществления

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1097622B (de) * 1953-12-31 1961-01-19 Dietrich Pulvermacher Verfahren und Vorrichtung zum gleichmaessigen Verdichten des Formsandes in Pressformmaschinen
DE1961234C3 (de) * 1969-12-05 1975-02-06 Kramatorskij Nautschno-Issledowatel' Skij I Projektno-Technologitscheskij Institut Maschinostrojenija, Kramatorsk (Sowjetunion) Verfahren und Vorrichtung zum Verdichten von GieBereiformmassen
DE2608740C2 (de) * 1976-03-03 1978-05-11 Eugen Dipl.-Ing. 8871 Burtenbach Buehler Verfahren zum Verdichten von Formsand
AT381877B (de) * 1978-12-15 1986-12-10 Fischer Ag Georg Verfahren und vorrichtung zum verdichten von koernigen stoffen, insbesondere giessereiformstoff
CH642288A5 (de) * 1980-02-18 1984-04-13 Fischer Ag Georg Verfahren und einrichtung zum verdichten von formstoff, insbesondere fuer giessformen.
EP0036434A1 (fr) * 1980-03-25 1981-09-30 Eugen Dipl.-Ing. Bühler Procédé et dispositif pour comprimer des moules en fonte
DE3025993C2 (de) * 1980-07-09 1983-11-10 Sintokogio, Ltd., Nagoya, Aichi Formvorrichtung zur Explosionsverdichtung eines sandartigen Füllmaterials
DE3238802A1 (de) * 1981-12-05 1983-06-16 VEB Kombinat Gießereianlagenbau und Gußerzeugnisse - GISAG -, DDR 7031 Leipzig Vorrichtung zur herstellung von sandformen und sandkernen
EP0170765B1 (fr) * 1981-12-28 1988-08-31 BMD Badische Maschinenfabrik Durlach GmbH Dispositif pour comprimer du matériel de moulage pour fonderies

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ATE37305T1 (de) 1988-10-15
DE3327822A1 (de) 1985-02-14
EP0139119B1 (fr) 1988-09-21
DE3474117D1 (en) 1988-10-27
EP0139119A1 (fr) 1985-05-02

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