EP1018384B1 - Dispositif de soupape - Google Patents

Dispositif de soupape Download PDF

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Publication number
EP1018384B1
EP1018384B1 EP99811191A EP99811191A EP1018384B1 EP 1018384 B1 EP1018384 B1 EP 1018384B1 EP 99811191 A EP99811191 A EP 99811191A EP 99811191 A EP99811191 A EP 99811191A EP 1018384 B1 EP1018384 B1 EP 1018384B1
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EP
European Patent Office
Prior art keywords
valve assembly
force transducer
assembly according
valve
actuating element
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
EP99811191A
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German (de)
English (en)
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EP1018384A1 (fr
Inventor
Johann Wyser
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fondarex SA
Original Assignee
Fondarex SA
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Filing date
Publication date
Application filed by Fondarex SA filed Critical Fondarex SA
Publication of EP1018384A1 publication Critical patent/EP1018384A1/fr
Application granted granted Critical
Publication of EP1018384B1 publication Critical patent/EP1018384B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/14—Machines with evacuated die cavity
    • B22D17/145—Venting means therefor

Definitions

  • the invention relates to a valve device according to the preamble of claim 1.
  • the die or the cavity of the die must of the die casting process. It doesn't just have to be in the cavities Existing air escapes from the die casting machine and the die can, but it must also be ensured that the out escaping the liquid casting compound gases can also escape.
  • vent valve the valve device should be closed as late as possible, so that the cavity is vented to full filling if possible, but on the other hand Liquid pouring material should be prevented from entering the vent valve penetrates.
  • valve devices for die casting molds, both types a vent valve with a reciprocating valve piston to close the ventilation duct have.
  • the valve piston is actuated externally the valve piston in the second type is operatively connected to a force transducer, the one directly from the one penetrating from the cavity into the ventilation channel Casting material is operated.
  • Externally operated valve devices are understood to mean that the valve piston not from the casting material penetrating from the cavity into the ventilation channel but is operated by an external energy source, the latter mostly is designed as a pneumatic or hydraulic system.
  • Point of time For triggering the closing process these valve devices can be used, for example determined by means of a sensor monitoring the fill level of the cavity become.
  • a difficulty with such valve devices is that the Actual closing process takes a relatively long time, because that is the closing process initiating signal (electrical impulse) in a mechanical movement, for example into actuating a servo valve. moreover must close the vent valve or one with the valve piston in There is a certain system pressure when the actuator is in active connection, so that the vent valve pneumatically or hydraulically within the required Period can be closed.
  • opening a servo valve generally causes a pressure drop after opening the servo valve the system pressure required to close the vent valve first be rebuilt. It is understood that such valve devices are one high construction costs and sensitive to certain operating parameters can react.
  • valve devices With the second type of valve devices, however, can be very fast and implement reliable valve devices. To the on the force transducer for the To be able to build up the necessary back pressure, this shows from the cavity ventilation duct leading to the force transducer changes in direction and cross-section on.
  • the ventilation channel between the force transducer and the actual valve body of the vent valve a certain minimum distance have and be angled so that the vent valve is securely closed before the liquid casting material has reached the vent valve.
  • the vent valve is on usually connected to a vacuum pump.
  • EP 0 612 573 describes a generic valve device for venting Die casting molds known, which have a ventilation channel, one in the ventilation channel arranged vent valve and an actuator for Closing the vent valve is provided.
  • the actuator has one Force transducer on, which from the cavity into the ventilation channel penetrating casting material can be acted upon and with the movable closure part of the vent valve is in mechanical operative connection. It is the force transducer is designed as a thrust member, its working stroke on one Fraction of that to be covered by the movable closure part of the vent valve Closing path is limited. Furthermore, the closure part of the vent valve Movable over the working stroke of the load cell in freewheel mode and the actuator has a power transmission member for the transmission of the shock pulse from the force transducer to the movable closure part of the Vent valve on.
  • Prestressed actuating element that is operatively connected to the closure part and the stop can be moved by a third party or by casting material is, so that the closure part of the vent valve under the action of the actuating element can be transferred from the open to the closed position, does not need first to build up a certain force (e.g. pneumatic) so that after releasing the actuator (moving the stop) Closure part of the vent valve is moved from the open to the closed position can be.
  • a certain force e.g. pneumatic
  • External actuation is understood to mean that an external one Energy source for moving the stop is provided while under Operated by the casting material is to be understood that the kinetic energy of the casting material is used to move the stop. It is both an immediate one as well as an indirect actuation of the stop, for example via a force transducer, possible.
  • FIG. 1 shows a longitudinal section through a valve device actuated by casting material, which is shown in principle. 1, the basic structure of the valve device 1 explained in more detail, only in connection with essential features of the invention is addressed. For better understanding the functioning of the valve device are the essential elements in FIG. 1 shown as lying in a common vertical plane, although some of the Elements in real embodiments are not in a common vertical plane are arranged, as will become apparent from the following figures.
  • the Valve device is shown in Figure 1 in the initial state in which the venting die is closed and its cavity (not shown) over the valve device can be vented.
  • the two halves 3A, 3B Die casting mold 3 is indicated.
  • the interface T of the die 3 is aligned with the front surface F of the valve device.
  • the valve device has a two-part housing 2, the first one, in the present case Example left housing half with the reference number 2A and the second, in present example right housing half is provided with the reference numeral 2B.
  • the first housing half 2A is provided with a ventilation channel open towards the front surface F. 10 provided, which is connected to the cavity of the die.
  • a vent valve 4 In the first housing half 2A are a vent valve 4, a force transducer 5, an actuating element 6, a driver element 8 and two supported by spring assemblies Ejection organs added, with only one spring assembly each from this illustration 12 and an ejection element 14 can be seen.
  • the ejection elements 14 also have each a plunger 20 which, when the die 3 is open, over the front surface F protrudes.
  • the vent valve 4, the force transducer 5, the actuating element 6, the driver element 8 and the two ejection elements 14 are axially parallel arranged to each other.
  • the second housing half 2B is for receiving the aforementioned Elements with an essentially double T-shaped recess 25 provided, wherein individual side surfaces of this recess 25 as Anti-rotation locks are used for some of the aforementioned elements, as follows is explained in more detail.
  • the actual valve 4 is a plunger valve, the longitudinal axis of which is perpendicular to the Front surface F of the housing 2 extends and the one to the ventilation duct 10 connected valve cylinder 41 and a locking part movable therein
  • Form of a valve piston 42 includes.
  • the valve piston 42 has a piston head 43 on the open valve 4 on the front surface F of the valve device 1 in the Vent channel 10 protrudes and to close the valve 4 in the valve cylinder 41 immersed.
  • a collar 45, the radial one, is provided behind the piston head 43 Has slots 46 through which the escaping from the ventilation channel 10 Air flows into an outlet duct 11 arranged on the upper side of the housing 2 can.
  • At the outlet duct 11 there is a suction line of a vacuum pump (not shown) connected.
  • a Compression spring 48 Around the valve 4 in the initial state shown here
  • the valve piston 42 is under the action of a Compression spring 48, which is at the bottom of the recess 25 in the second Half of the housing 2B is
  • a multi-part actuating device is provided for closing the valve 4.
  • the force transducers are essential components of this actuating device 5, the actuating element 6 and one arranged in the second housing half 2B Stop 7 with a pivotably mounted locking member 70 name, by means of which the actuating element 6 locks in the starting position can be.
  • the force transducer 5 stands over the driver element 8 with the Valve piston 42 in mechanical operative connection. That between the force transducer 5 and the vent valve 4 arranged driver element 8 has a Bund 82 on both in a recess 55 in the force transducer 5 and in a recess 44 engages in the valve piston 42.
  • the length of the recess 55 in Force transducer 5 is at least approximately the closing stroke of valve piston 42 is longer than the thickness of the engaging covenant 82.
  • the actuator 6 is biased by a spring 63 and on the back provided with a cylindrical extension 61, which is under the bias the spring 63 is supported on the locking member 70.
  • the force transducer 5 is designed as a short-stroke shock piston, which in one in the ventilation duct 10 opening working cylinder 50 is movable.
  • the backside of the force transducer 5 forms an extension 51, which extends directly to the locking member 70 reaches.
  • the force transducer points to limit the working stroke 5 a collar 53 lying against the bottom of the recess 25.
  • Each of the two ejection elements 14, 15 is provided with a drive plate 17, which also engages in the recess 55 in the force transducer 5, wherein the length of the recess in the force transducer 5 approximately by the working stroke of the Force transducer (approx. 1mm) is longer than the thickness of the drive plates 17.
  • the spring assemblies 12 are between the bottom of the recess 25 in the second housing part 2B and the drive plates 17, 18 arranged.
  • the two plungers 20 and 21 are provided for tensioning the spring assemblies 12, 13, which pass freely through the first housing half 2A.
  • the plungers 20, 21 protrude in the initial state over the front surface F from the first half of the housing 2A and become when the two mold halves of the die casting mold are brought together pushed back, which for tensioning the two spring assemblies 12 in the here shown state leads.
  • Fig. 2 shows a real embodiment of the valve device 1 in a longitudinal section. From this illustration it can be seen that the actuating element and the Ejection elements 14 are not in a common vertical plane with the force transducer 5, the driving element 8 and the vent valve 4.
  • FIG. 3 shows an interior view of the first housing half 2A of the valve device, the valve piston 42, the force transducer 5, the actuating element 6, the Driver element 8 and the two ejection elements 14, 15 in a view from are shown at the back.
  • FIG. 4 shows a top view of the second housing half 2B of the valve device, the valve piston 42, the force transducer 5, the actuating element 6, the Driver element 8 and the two ejection elements 14, 15 in a view from are shown at the front. From this illustration, the one in the second housing half 3b recessed and substantially double T-shaped recess 25 can be seen. Individual side surfaces of this recess 25 act as guide surfaces, by the flats on the collar 62 of the actuating element 6, the drive plates 17, 18 and the collar 38 of the driving element 8 on these side surfaces 27, 28, 30, 31 are performed.
  • the locking member 70 of the stop 7 is pivotally mounted about an axis 71 and is by a return spring 72 in the locking the actuator 6 Starting position held. As soon as the force transducer 5 backwards the locking member 70 is moved, its extension 51 lies on the locking member 70 so that it pivots about its axis 71 in the direction of arrow P. and the actuator 6 is released. The actuator 6 is then moved backwards under the action of the force of the spring 63. there the disk-shaped collar 62 of the actuating element 6 lies on the wall of the recess 47 in the valve piston 42 (FIG. 1), so that the valve piston 42 of the open position is moved to the closed position.
  • the locking member 70 has in the region of the extension 61 of the actuating element 6 a recess 68, so that the extension 61 is only a fraction supports its average cross-sectional area on the locking member 70. Thereby a pivoting movement of the locking member 70 by about 2 ° in the direction of the arrow is sufficient P off to release the actuator 6.
  • the longitudinal axis of the actuating element 6 is around the distance L2 and the longitudinal axis of the force transducer 5 by the distance L1 with respect to the axis of rotation 71 of the Locking member 70 offset. Meanwhile, the longitudinal axis 64 of the actuator 6 by several mm on one side of the axis of rotation 71 of the locking member 70 is offset, the point of application of the actuating element 6 practically falls with the axis of rotation 71 of the locking member 70 together.
  • Fig. 6 shows the valve device in the closed state. From this illustration it can be seen that the liquid casting material enters the cylinder space only to a small extent 50 of the force transducer 5 and later in the cylinder space 41 of the valve 4 can penetrate, so that the later removal of the solidified casting material from the ventilation duct 10 presents no difficulties.
  • Fig. 7 shows the valve device after the die has been opened.
  • the Return of the force transducer 5, the actuating element 6 and the driving element 8 in the basic state shown after completion of a casting process takes place, as already mentioned above, by means of the two spring assemblies 12, 13 (Fig. 1). From this illustration it can be seen that the force transducer 4 is as far behind was pushed into the front of the ventilation duct 10 that its head or front side lifts off the bottom of the ventilation duct 10. In this condition can lead through a first housing half 2A to the force transducer 5 Channel (not shown) air is blown past the force transducer 5. Air can also be blown out via the vent valve 4.
  • Blowing out air can also result in a cooling effect of the elements mentioned -force transducer 5 and vent valve 4- are effected.
  • any other media which one Have cooling and / or cleaning effect or triggering the riser from the Support valve device can be used.
  • the driving element 8 is also moved backwards. Since the Recess 55 in the force transducer 5, however, by at least approximately Closing stroke of the valve piston 42 is longer than the thickness of the engaging collar 38 of the entrainment member 8, the valve piston 42 together with the entrainment member moved back over the working stroke of the force transducer 5 become.
  • the actuating element 6 could also be pneumatic or hydraulic, for example preloaded and closed with hydraulic or pneumatic support become. At most, there would also be electromagnetic support conceivable. A corresponding channel must be used to supply the appropriate medium (not shown) can be provided.
  • valve piston 42 can also without the help of the actuating element 6 can be moved from the open to the closed position.
  • that of the force transducer 5 via the driver element 8 on the Valve piston 42 transmitted pulse so that the valve piston 42 together with the driving element 8 over the working stroke of the force transducer 5 in free-running move to the closed position.
  • To the from the casting material to the force transducer 5 transferred energy in the case of large casting masses and / or high ones Limiting the speeds of the casting material becomes the working stroke of the Force transducer 5 by the collar resting on the bottom of the recess 25 53 limited to approx. 1 mm.
  • the two ejection elements 14, 15 serve in addition to ejecting the casting material solidified in the ventilation duct 10 the return of the force transducer 5, the driving element 8, the actuating element 6 and the valve piston 42 in the initial state shown in FIG. 5.
  • the two elements are formed by a plurality of disc springs Spring packs 12, 13. After the die 3 has been opened, the two spring assemblies 12, 13 relax because the plunger 20, 21 by the distance the corresponding mold half 3B are released from the abutting surface.
  • the Driving disks 17, 18 now move under the action of the tensioned spring assemblies 12, 13 the force transducer 5, the driving element 8, the actuating element 6 and the valve piston 42 in the basic state.
  • the movement of the stop in each case Cast material operated are also embodiments of valve devices possible in which the stop is moved externally.
  • the stop could be pneumatic, hydraulic using an external energy source or also be shifted electromagnetically, the triggering time could be timed or determined by means of a sensor.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Air-Flow Control Members (AREA)
  • Self-Closing Valves And Venting Or Aerating Valves (AREA)
  • Actuator (AREA)
  • Magnetically Actuated Valves (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • External Artificial Organs (AREA)
  • Compressor (AREA)

Claims (18)

  1. Dispositif de soupape (1) pour la purge d'air de moules de coulée sous pression (3), avec un canal de purge d'air (10), une soupape de purge (4) disposée dans le canal de purge d'air (10) et dotée d'une pièce de fermeture (42), ainsi que d'un dispositif d'actionnement pour la fermeture de la soupape de purge (4), caractérisé en ce que le dispositif d'actionnement comporte un élément d'actionnement (6), préchargé contre une butée (7), se trouvant en relation fonctionnelle avec la pièce de fermeture (42), laquelle butée (7) est mobile sous l'action de matière étrangère ou de matière de coulée, de telle sorte que la pièce de fermeture (42) de la soupape de purge (4) peut être transposée de la position ouverte à la position fermée sous l'effet de l'élément d'actionnement (6).
  2. Dispositif de soupape selon la revendication 1, caractérisé en ce que le dispositif d'actionnement comporte un capteur dynamométrique (5), qui peut être déplacé contre la butée (7) par la matière de coulée progressant depuis la cavité dans le canal de purge d'air (10).
  3. Dispositif de soupape selon la revendication 1, caractérisé en ce que la butée (7) peut être décalée électromagnétiquement, pneumatiquement ou hydrauliquement.
  4. Dispositif de soupape selon l'une quelconque des revendications précédentes, caractérisé en ce que la butée (7) comprend un organe de verrouillage (70) monté basculant, lequel est maintenu par au moins un ressort (72) dans la position initiale qui verrouille l'élément d'actionnement (6).
  5. Dispositif de soupape selon l'une quelconque des revendications précédentes, caractérisé en ce que l'élément d'actionnement (6) comporte un prolongement (61) s'appuyant avec une fraction de sa section moyenne sur l'organe de verrouillage (70).
  6. Dispositif de soupape selon la revendication 4 ou 5, caractérisé en ce que l'élément d'actionnement (6) est disposé de telle sorte que son axe est parallèle à celui du capteur dynamométrique (5), moyennant quoi aussi bien l'axe longitudinal (64) de l'élément d'actionnement (6) que l'axe longitudinal (53) du capteur dynamométrique (5) sont à distance par rapport à l'axe de rotation (71) de l'organe de verrouillage (70), et moyennant quoi les deux axes longitudinaux (53, 64) sont décalés en sens opposé de l'axe de rotation (71) de l'organe de verrouillage (70).
  7. Dispositif de soupape selon la revendication 6, caractérisé en ce que la distance entre l'axe de rotation (71) de l'organe de verrouillage (70) et l'axe longitudinal (64) de l'élément d'actionnement (6) correspond à une fraction de la distance entre l'axe de rotation (71) de l'organe de verrouillage (70) et l'axe longitudinal (53) du capteur dynamométrique (5), moyennant quoi l'axe longitudinal (64) de l'élément d'actionnement (6) est décalé d'un côté de l'axe de rotation (71) de l'organe de verrouillage (70).
  8. Dispositif de soupape selon l'une quelconque des revendications précédentes, caractérisé en ce que la pièce de fermeture (42) de la soupape de purge (4) peut être couplée par transmission de force au capteur dynamométrique (5) par l'intermédiaire d'un organe d'entraínement (8).
  9. Dispositif de soupape selon la revendication 8, caractérisé en ce que l'organe d'entraínement (8) est disposé entre le capteur dynamométrique (5) et la pièce de fermeture (42) et possède un collet en forme de disque (38) qui vient en prise respectivement dans un évidement (44, 55) dans le capteur dynamométrique (5) et dans la pièce de fermeture (42).
  10. Dispositif de soupape selon la revendication 9, caractérisé en ce que la longueur de l'évidement (55) dans le capteur dynamométrique (5) est plus longue, au moins d'à peu près la course de fermeture de la pièce de fermeture (42), que l'épaisseur du collet (38) qui vient en prise, de telle sorte que la pièce de fermeture (42) est mobile, conjointement avec l'élément d'actionnement (6), de la position ouverte à la position fermée, au-delà de la course de travail du capteur dynamométrique (5).
  11. Dispositif de soupape selon l'une quelconque des revendications précédentes, caractérisé en ce que l'élément d'actionnement (6) comporte un collet en forme de disque (62), lequel vient en prise dans un évidement (47) dans la pièce de fermeture (42), moyennant quoi la longueur de l'évidement (47) dans la pièce de fermeture (42) est plus longue, au moins d'à peu près la course de fermeture de la pièce de fermeture (42), que l'épaisseur du collet en forme de disque (62) de l'élément d'actionnement (6) qui vient en prise, de telle sorte que la pièce de fermeture (42) conjointement avec l'organe d'entraínement (8) peut exécuter un mouvement relatif dans le sens de la fermeture par rapport à l'élément d'actionnement (6).
  12. Dispositif de soupape selon l'une quelconque des revendications précédentes, caractérisé en ce que l'élément d'actionnement (6) est préchargé pneumatiquement, hydrauliquement ou par la force d'un ressort.
  13. Dispositif de soupape selon l'une quelconque des revendications précédentes, caractérisé en ce qu'un espace cylindrique (50) est prévu pour la réception du capteur dynamométrique (5), configuré essentiellement cylindriquement, moyennant quoi le capteur dynamométrique (5) peut être introduit aussi loin vers l'avant dans le canal de purge d'air (10) que sa face frontale se soulève du fond du canal de purge d'air (10).
  14. Dispositif de soupape selon l'une quelconque des revendications précédentes, caractérisé en ce que le capteur dynamométrique (5) comporte un collet (54) attenant à la face frontale, dont le diamètre correspond au moins à peu près au diamètre de l'espace cylindrique (50), et en ce que le capteur dynamométrique (5) est doté d'un col (56) comportant des traversées axiales.
  15. Dispositif de soupape selon l'une quelconque des revendications précédentes, caractérisé en ce que le dispositif de soupape comporte un carter (2) en deux parties et en ce que le capteur dynamométrique (5), la pièce de fermeture (42), l'élément d'actionnement (6) ainsi que l'organe d'entraínement (8) sont logés dans le carter (2) avec leurs axes parallèles.
  16. Dispositif de soupape selon la revendication 15, caractérisé en ce que le collet (38) de l'organe d'entraínement (8) présente une forme de base circulaire, qui est dotée de deux méplats s'étendant parallèlement, et en ce que l'une des moitiés de carter (2A) est dotée de surfaces de guidage (27, 28) pour guider le collet (38) de l'organe d'entraínement (8).
  17. Dispositif de soupape selon la revendication 15 ou 16, caractérisé en ce que l'élément d'actionnement (6) possède un collet (62) présentant une forme de base circulaire, qui est doté d'un méplat, et en ce que l'une des moitiés de carter (2A) est dotée d'une surface de guidage (31) correspondante jouant le rôle de sécurité antirotation.
  18. Dispositif de soupape selon l'une quelconque des revendications 15 à 17, caractérisé en ce que l'organe de verrouillage (70) est logé basculant dans l'une des moitiés de carter (2B).
EP99811191A 1999-01-06 1999-12-22 Dispositif de soupape Expired - Lifetime EP1018384B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1499 1999-01-06
CH1499 1999-01-06

Publications (2)

Publication Number Publication Date
EP1018384A1 EP1018384A1 (fr) 2000-07-12
EP1018384B1 true EP1018384B1 (fr) 2003-08-13

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ID=4177453

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EP99811191A Expired - Lifetime EP1018384B1 (fr) 1999-01-06 1999-12-22 Dispositif de soupape

Country Status (7)

Country Link
US (1) US6513568B1 (fr)
EP (1) EP1018384B1 (fr)
JP (1) JP2000202609A (fr)
AT (1) ATE246974T1 (fr)
CA (1) CA2293108A1 (fr)
DE (1) DE59906583D1 (fr)
TW (1) TW418137B (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW579311B (en) * 2000-09-22 2004-03-11 V D S Vacuum Diecasting Servic Diecasting valve
DE10207028B4 (de) * 2001-02-20 2008-07-24 Toshiba Kikai K.K. Spritzgießmaschine
DE50208528D1 (de) * 2001-09-21 2006-12-07 Fondarex Sa Entlüftungsventileinrichtung für Giessformen
TWI296564B (en) * 2005-07-29 2008-05-11 Delta Electronics Inc Gas exhausting and entering structure
JP5717692B2 (ja) * 2012-06-04 2015-05-13 ジヤトコ株式会社 真空ダイカスト鋳造装置のバルブ装置
JP7068880B2 (ja) * 2018-03-26 2022-05-17 本田技研工業株式会社 減圧遮断弁装置及びその制御方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2751431C2 (de) * 1977-11-17 1986-03-06 Fritz Territet Vaud Hodler Entlüftungsventil für Druckgießformen
US4852634A (en) * 1987-10-12 1989-08-01 Ryobi Ltd. Gas venting arrangement in injection molding apparatus and method for venting gas in the injection molding apparatus
DE4302798C1 (de) * 1993-02-02 1994-06-16 Hodler F & Cie Fondarex Sa Ventileinrichtung zum Entlüften von Druckgiessformen
EP0937524A1 (fr) * 1998-02-19 1999-08-25 Fondarex S.A. Procédé pour désaérer des moules à couler sous pression et dispositif à valve pour la mise en oeuvre de ce procédé

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Publication number Publication date
US6513568B1 (en) 2003-02-04
EP1018384A1 (fr) 2000-07-12
CA2293108A1 (fr) 2000-07-06
TW418137B (en) 2001-01-11
JP2000202609A (ja) 2000-07-25
ATE246974T1 (de) 2003-08-15
DE59906583D1 (de) 2003-09-18

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