EP1295655B1 - Dispositif de soupape pour l'évacuation des moules de fonderrie - Google Patents

Dispositif de soupape pour l'évacuation des moules de fonderrie Download PDF

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Publication number
EP1295655B1
EP1295655B1 EP02405667A EP02405667A EP1295655B1 EP 1295655 B1 EP1295655 B1 EP 1295655B1 EP 02405667 A EP02405667 A EP 02405667A EP 02405667 A EP02405667 A EP 02405667A EP 1295655 B1 EP1295655 B1 EP 1295655B1
Authority
EP
European Patent Office
Prior art keywords
valve
venting
closing member
assembly according
valve assembly
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
EP02405667A
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German (de)
English (en)
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EP1295655A1 (fr
Inventor
Andreas Wüthrich
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
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fondarex SA filed Critical Fondarex SA
Publication of EP1295655A1 publication Critical patent/EP1295655A1/fr
Application granted granted Critical
Publication of EP1295655B1 publication Critical patent/EP1295655B1/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
    • B22D17/20—Accessories: Details
    • 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 vent valve device for molds according to the preamble of claim 1.
  • the casting mold or the cavity of the casting mold must be vented during the casting process. Not only must it be possible for the air present in the cavities of the casting machine and the casting mold to escape, but it must also be ensured that the gases emerging from the liquid casting mass can likewise escape.
  • vent valve of the valve device should be closed as late as possible, so that the cavity is vented as far as possible to complete filling, but on the other hand to prevent liquid casting material from entering the vent valve.
  • valve devices for die casting molds both types having a bleed valve with a reciprocating closure member for closing the bleed channel. While in the first type the closure member is externally actuated, the closure member in the second type is operatively connected to a force transducer which is actuated directly by the casting material penetrating the cavity into the venting channel utilizing its kinetic energy.
  • valve piston Under externally operated valve devices is understood that the valve piston is not actuated by the penetrating from the cavity in the venting channel casting material, but by an external power source, the latter is designed as a majority pneumatically or hydraulically operating system.
  • the timing for triggering the closing operation may be, for example, in these valve devices be determined by means of a fill level of the cavity monitoring sensor.
  • a difficulty with such valve devices is that the actual closing process takes a relatively long time, since the signal initiating the closing process (electrical pulse) has to be converted into a mechanical movement, for example into the actuation of a servo valve.
  • a certain system pressure must prevail for closing the venting valve or an actuating member operatively connected to the valve piston, so that the venting valve can be closed pneumatically or hydraulically within the required period of time.
  • the opening of a servo valve generally causes a pressure drop, after opening the servo valve, the system pressure required to close the vent valve must first be reestablished.
  • a locking mechanism that locks the valve piston in the open position, to be moved, which also leads to a delay in the closing process. It is understood that such valve devices require a high structural complexity and can react prone to certain operating parameters. In addition, such valve devices usually require at least about 10 ms from recognition of the mold filling to complete closure of the valve piston.
  • valve devices By contrast, very fast and reliable valve devices can be realized with the second type of valve devices.
  • the venting channel leading from the cavity to the force transducer has directional and cross-sectional changes.
  • the venting channel between the force transducer and the actual valve body of the vent valve must have a certain minimum distance and be designed angled so that the vent valve is securely closed before the liquid casting material has reached the vent valve.
  • a vacuum pump is usually connected to the vent valve.
  • a generic valve device for venting of die casting molds which with a vent channel, one in the vent channel arranged vent valve and an actuator for closing the vent valve is provided.
  • the actuating device has a force transducer, which can be acted upon by the casting material protruding from the cavity into the venting channel and is in mechanical operative connection with the movable closure part of the venting valve.
  • the force transducer is designed as a shock member whose working stroke is limited to a fraction of the closing path to be covered by the movable closure part of the venting valve.
  • the closure part of the venting valve is free to move beyond the working stroke of the force transducer and the actuating device has a force transmission member for the transmission of the shock pulse from the force transducer to the movable closure part of the venting valve.
  • the object of the invention is to improve a vent valve device referred to in the preamble of claim 1 type such that it is universally applicable by their closure member regardless of the operating parameters of the casting device and the casting material, can be moved very quickly and reliably from the open to the closed position regardless of the process.
  • the closure member can be closed externally operated very quickly, in particular the time to cancel the frictional connection compared to conventional latches of the closure member is very short, especially since the closure member can already be biased in the closing direction or biased.
  • a vent valve is provided with a hydraulically or pneumatically loadable chamber, which is provided with a vaultable in the direction of the closure member, the closure member frictionally fixable chamber wall.
  • the chamber wall is so far deflected within the elastic limit of the material (steel), that it automatically bulges after the reduction of the pressure prevailing in the chamber in the release position releasing the closure member.
  • a pressure does not first have to be built up and / or a closure member has to be moved from a locking position into an unlocked position, so that the closure member can be moved from the open position to the closed position, but only the pressure in the locking position has to be increased Chamber are reduced so far that the chamber wall bulges back so that the prestressed closure member is released and can suddenly move from the open to the closed position.
  • This pressure reduction can be done for example by opening a relief valve.
  • the entire closing time from the recognition of the mold filling to the complete Closing the closure member can be significantly shortened in this way.
  • the vent valve 1 has a round valve housing 2, which is provided with a central valve channel 3 for receiving and guiding a closure member 20.
  • a vent channel 7 venting chamber 6 On the front side of the valve housing 2 acting as an extension of a vent channel 7 venting chamber 6 is arranged, which is connected via a valve seat 9 with the valve channel 3.
  • the venting chamber 6 is arranged between a first venting duct section 7a leading into the cavity to be vented and a second venting duct section 7b leading from the top of the valve housing 2 on the upper side.
  • This second vent channel section 7b opens radially into a valve chamber 4 arranged in front of the valve channel 3 and adjacent to the valve seat 9.
  • a pneumatic chamber 10 is inserted, which is closed by means of a cover 11. Furthermore, a valve chamber 3 enclosing hydraulic chamber 13 is inserted into the valve housing 2.
  • This hydraulic chamber 13 is provided with a relatively thin, adjacent to the valve channel 3 chamber wall 14, which under the action of a in the hydraulic chamber 13 producible overpressure in the direction of the valve channel 3 is elasticallyrankbbar, as can be seen from Fig. 2 in an enlarged and in favor of a good recognizability greatly exaggerated representation.
  • valve channel 3 the displaceable between an open and a closed position closure member 20 is received, wherein the closure member 20 is shown in the present example in the open position.
  • the closure member 20 has a valve stem 21 with a valve head 22 arranged at the end and designed as a conical valve. With this valve head 22, the vent channel 7 can be closed at the valve seat 9, if necessary, so that no casting material from the first vent channel section 7a can penetrate into the valve channel 3 and the second vent channel section 7b.
  • a valve plate 23 is connected to the valve stem 21 by means of a screw 27.
  • the valve disk 23 has a peripheral collar 25 serving as a stop and an elastic deflectable center plate part 24.
  • valve plate 23 is received in the pneumatic chamber 10, wherein the valve plate 23, and thus also the closure member 20, can be moved pneumatically both to the right in the open position shown as well as to the left in the closed position.
  • two channels 28, 29 are provided, which open frontally before and behind the valve disk 23 into the pneumatic chamber 10.
  • valve channel 3 shows a cross section through the venting valve along the line AA in FIG. 1.
  • both the valve channel 3 and the valve stem 21 have a polygonal cross section. This has the advantage, inter alia, that the valve disk 23 can be easily removed from the valve stem 21 by releasing the valve disc 23 fixing the valve stem 21 without fixing the valve stem since the valve stem 21 in the valve channel 3 can not rotate (FIG . 1).
  • a polygonal design of the valve channel 3 also favors a clamping, frictional locking of the closure member 20th
  • FIG. 4 which shows a cross-section through the venting valve along the line B-B in FIG. 1, the venting duct section 7b leading from the housing 2 on two sides can be seen.
  • the venting valve device has a sensor 30 preferably arranged in the first venting duct section 7a, by means of which the casting material penetrating into the venting duct can be detected.
  • a control and monitoring unit 32 is provided which comprises a hydraulic unit 33 and a pneumatic unit 34.
  • the hydraulic unit 33 is connected via a feed 36 and a return 37 to the hydraulic chamber 13.
  • a relief valve assembly 38 is provided, which u.a. a relief valve 39 arranged in the return 37, by means of which a rapid reduction of the prevailing in the hydraulic chamber 13 overpressure can be initiated. The actuation of this relief valve 39, i. the opening, by means of the sensor signal, which is indicated by the leading from the sensor 30 to the discharge valve 39 line 40.
  • a pneumatic source 34 For the pneumatic actuation of the valve disk 23, two lines 41, 42 leading from the pneumatic source 34 to the pneumatic chamber 10 are provided. Via a third line 43 of the prevailing in the vent passage vacuum can be measured.
  • a pneumatic source 34 is in most cases an in-house pressure connection, of course, a separate pressure source can be provided. Furthermore, a vacuum source for forcibly venting the cavity is connected to the second vent channel section 7b.
  • the entire elements are coordinated so that the closure member 20, even with full pressurization of the valve disk 23 in the closing direction, is frictionally held by the bulged chamber wall 14 in the open position.
  • the vent valve 1 is in the venting position, in which via the vent channel 7 before and during the actual casting process continuously air / gases can be sucked out of the cavity / can.
  • the sensor 30 As soon as the casting material reaches the sensor 30, the latter generates an electrical signal which is used directly or indirectly to open the relief valve 38.
  • the relief valve 38 By opening the relief valve 38, the pressure in the hydraulic chamber 13 is abruptly reduced, since only a very small volume of hydraulic fluid must flow out of the hydraulic chamber 13, so that the bulged chamber wall 14 curves back automatically.
  • valve plate 23 helps to absorb the kinetic energy of the closure member 20 in terms of a resilient end stop by first serving as a stop collar 25 of the valve plate 23 on the lid 11 applies and the kinetic energy is trapped by the elastic plate middle part 24.
  • the valve plate 23 is made of an elastic material with a high internal damping, wherein the elastic plate middle part 24 is designed such that it is deflected only within the elastic limit of the material.
  • valve plate 23 As a material for the valve plate 23, in particular composite fiber materials offer, since they are lightweight and their properties can be selectively influenced by These are specifically provided with a high internal damping.
  • the arrangement valve plate-closure member is designed and dimensioned so that the valve head 22 has not yet applied sealingly on the valve seat 9 when the collar 25 of the valve plate 23 on the lid 11 of the pneumatic chamber 10 comes to rest. The transmitted during the closing movement of the closure member 20 kinetic energy is therefore intercepted controlled by the valve disk 23. After the valve plate 23 has applied with its collar 25 on the lid 11 of the pneumatic chamber 10, the valve plate 23 is deflected so far elastically by the inherent in the closure member 20 kinetic energy until the valve head 22 rests sealingly on the valve seat 9. This deflected state of the valve disk 23, in which the valve seat 9 is closed by the valve head 22, remains in existence as long as a minimum overpressure, for example 5 bar, is maintained in the pneumatic chamber 10.
  • a spring instead of pneumatic means for biasing the closure member 20, it could also offer to bias this by means of a spring.
  • piezoelectric crystals could also be used, for example, which frictionally fix the closure member 20 under the influence of an applied electrical voltage.
  • a vent valve device may be provided which comprises more than one vent valve.
  • a poppet valve instead of a poppet valve, for example, a cylindrical or flat valve can be used.

Landscapes

  • Mechanical Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Self-Closing Valves And Venting Or Aerating Valves (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Valve Housings (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Prostheses (AREA)
  • Macromonomer-Based Addition Polymer (AREA)
  • Pens And Brushes (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)
  • Feeding And Controlling Fuel (AREA)
  • Casting Devices For Molds (AREA)
  • Lift Valve (AREA)

Claims (16)

  1. Installation à soupape pour permettre de purger l'air pour moules de coulage, comprenant une soupape pour permettre de purger l'air (1) qui présente une cage de soupape (2) pourvue d'un évent (7), ainsi qu'un organe de fermeture déplaçable entre une position d'ouverture et une position de fermeture et servant à fermer l'évent (7), caractérisée en ce que l'organe de fermeture (20) peut être maintenu par friction dans la position d'ouverture et qu'il peut en même temps être précontraint dans la direction de fermeture.
  2. Installation à soupape pour permettre de purger l'air pour moules de coulage suivant la revendication 1, caractérisée en ce que sont prévus des premiers moyens pour la fixation entraînée par friction de l'organe de fermeture dans la position d'ouverture et des seconds moyens pour la précontrainte dans la direction de fermeture de l'organe de fermeture fixé en position d'ouverture.
  3. Installation à soupape pour permettre de purger l'air, caractérisée en ce que les premiers moyens présentent une chambre (13) qui peut être sollicitée hydrauliquement ou pneumatiquement et qui est pourvue d'une paroi de chambre (14) pouvant être bombée en direction de l'organe de fermeture (20), dont elle assure la fixation entraînée par friction.
  4. Installation à soupape pour permettre de purger l'air, caractérisée en ce que la paroi de la chambre (14) peut être déviée dans la limite d'élasticité de la matière jusqu'à ce qu'elle revienne automatiquement à l'état initial, dégageant l'organe de fermeture (20), une fois que la surpression régnant dans la chambre (13) a été réduite.
  5. Installation à soupape pour permettre de purger l'air, caractérisée en ce que les seconds moyens comprennent une chambre (10), qui peut être mise pneumatiquement sous surpression et dans laquelle est disposé un volet (23), qui est situé sur l'organe de fermeture (20) ou qui concourt avec celui-ci et qui peut être sollicité pneumatiquement dans la direction de fermeture de l'organe de fermeture (20).
  6. Installation à soupape pour permettre de purger l'air, caractérisée en ce que les seconds moyens comprennent un ressort qui précontraint l'organe de fermeture (20) dans la direction de fermeture.
  7. Installation à soupape pour permettre de purger l'air, caractérisée en ce que l'organe de fermeture (20) est reçu, de manière déplaçable, dans la cage de soupape (2), dans un passage libre (3) de la soupape et en ce que la chambre (13) entoure au moins partiellement le passage libre (3) de la soupape.
  8. Installation à soupape pour permettre de purger l'air suivant une des revendications 3, 4 ou 7, caractérisée en ce qu'une soupape de décharge (39) est prévue pour la réduction de la surpression régnant dans la chambre (13), qui peut être sollicitée hydrauliquement, ainsi que pour l'annulation de la liaison entraînée par friction entre la paroi de chambre (14) et l'organe de fermeture (20) dans un laps de temps prédéterminé.
  9. Installation à soupape pour permettre de purger l'air suivant la revendication 8, caractérisée en ce qu'est prévu au moins un détecteur (30) pour la détection de la matière de remplissage avançant dans l'évent (7), détecteur qui sert à la commande directe ou indirecte de la soupape de décharge (39).
  10. Installation à soupape pour permettre de purger l'air suivant une des revendications précédentes, caractérisée en ce que l'organe de fermeture (20) présente une tige de soupape (21), sur l'extrémité de laquelle est disposée une tête de soupape (22) agissant comme élément de fermeture.
  11. Installation à soupape pour permettre de purger l'air suivant la revendication 10, caractérisée en ce que le passage libre (3) pratiqué dans la cage de soupape (2) présente une section transversale s'écartant du cercle, de préférence une section transversale polygonale et en ce que la tige de soupape (21) de l'organe de fermeture (20) correspond à la forme du passage libre (3) de la soupape, alors que la tête de soupape (22) est conçue ronde.
  12. Installation à soupape pour permettre de purger l'air suivant la revendication 10 ou 11, caractérisée en ce que la cage de soupape (2) est pourvue d'une première et d'une seconde section de l'évent (7a, 7b), entre lesquelles est disposé un siège de soupape (9) pouvant être fermé par la tête de soupape (22).
  13. Installation à soupape pour permettre de purger l'air suivant la revendication 5, caractérisée en ce que le volet (23) est disposé sur le côté opposé à la tête de soupape (22), sur la tige de soupape (21), le volet (23) pouvant être sollicité pneumatiquement en direction d'ouverture et de fermeture.
  14. Installation à soupape pour permettre de purger l'air suivant la revendication 13, caractérisée en ce que le volet (23) est pourvu d'un collet (25) servant de butée, ainsi que d'une partie centrale de volet (24) pouvant être déviée par déformation et absorbant l'énergie cinétique de l'organe de fermeture (20) lors du mouvement de fermeture.
  15. Installation à soupape pour permettre de purger l'air suivant la revendication 14, caractérisée en ce que le volet (23) est fabriqué en un matériau à autoamortissement élevé, de préférence en un matériau composite renforcé par des fibres.
  16. Installation à soupape pour permettre de purger l'air suivant une des revendications 13 à 15, caractérisée en ce que le volet (23) est relié de manière amovible à l'organe de fermeture.
EP02405667A 2001-09-21 2002-07-31 Dispositif de soupape pour l'évacuation des moules de fonderrie Expired - Lifetime EP1295655B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH175001 2001-09-21
CH17502001 2001-09-21

Publications (2)

Publication Number Publication Date
EP1295655A1 EP1295655A1 (fr) 2003-03-26
EP1295655B1 true EP1295655B1 (fr) 2006-10-25

Family

ID=4566128

Family Applications (1)

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EP02405667A Expired - Lifetime EP1295655B1 (fr) 2001-09-21 2002-07-31 Dispositif de soupape pour l'évacuation des moules de fonderrie

Country Status (18)

Country Link
US (1) US6823930B2 (fr)
EP (1) EP1295655B1 (fr)
JP (1) JP4256647B2 (fr)
KR (1) KR20030025799A (fr)
CN (1) CN1409036A (fr)
AT (1) ATE343443T1 (fr)
BR (1) BR0203816A (fr)
CA (1) CA2398535A1 (fr)
DE (1) DE50208528D1 (fr)
HU (1) HUP0202569A2 (fr)
IL (1) IL151266A (fr)
MX (1) MXPA02009193A (fr)
NO (1) NO20024535L (fr)
PL (1) PL356118A1 (fr)
RU (1) RU2002125441A (fr)
SG (1) SG113433A1 (fr)
TW (1) TW539818B (fr)
ZA (1) ZA200206480B (fr)

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TWI296564B (en) * 2005-07-29 2008-05-11 Delta Electronics Inc Gas exhausting and entering structure
SK92006A3 (sk) * 2006-01-17 2007-08-02 Matador, A.S. Odvzdušňovací ventil do odvzdušňovacieho otvoru vulkanizačnej formy na výrobu pneumatík
CH700743A1 (de) * 2009-04-06 2010-10-15 Fondarex Sa Entlüftungseinrichtung für Giessvorrichtungen.
DE102009020064A1 (de) 2009-05-06 2010-11-11 Dürr Systems GmbH Fluidventil, insbesondere Rückführventil für eine Lackieranlage
CH705077B1 (fr) * 2011-06-09 2016-01-29 V D S Vacuum Diecasting Service S A Dispositif de vanne pour l'évacuation d'air d'un moule.
US10579664B2 (en) * 2013-09-06 2020-03-03 Realnetworks, Inc. Device-centric media prioritization systems and methods
CH710347B1 (de) * 2014-11-07 2018-05-31 Fondarex Sa Ventileinrichtung zum Entlüften von Druckgiessformen.
CN105465457B (zh) * 2015-12-30 2017-12-12 广州市型腔模具制造有限公司 一种真空压铸系统
JP6576862B2 (ja) * 2016-03-16 2019-09-18 東芝メモリ株式会社 トランスファ成型装置
CN106003613B (zh) * 2016-07-01 2018-01-30 何宏雷 一种注塑机排气总成
WO2018082939A2 (fr) * 2016-11-04 2018-05-11 Magna BDW technologies GmbH Dispositif, commande et module de filtre permettant de produire des pièces moulées sous pression, ainsi que procédé associé
DE102016221678B4 (de) * 2016-11-04 2020-07-16 Magna BDW technologies GmbH Vorrichtung zur Herstellung von Druckgussteilen
AU2021200566B2 (en) * 2020-03-20 2022-06-02 Heraeus Medical Gmbh Device and method for producing spacers
WO2022085058A1 (fr) * 2020-10-20 2022-04-28 株式会社ダイエンジニアリング Dispositif de vanne, moule et appareil de coulée sous pression
JP2022149302A (ja) * 2021-03-25 2022-10-06 本田技研工業株式会社 遮断弁用のキャップ部材、遮断弁用の弁体、遮断弁の製造方法、および遮断弁の弁体の交換方法
CN114368122B (zh) * 2021-11-29 2023-10-20 深圳市星凯科技有限公司 一种注塑模具用检测器

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AU529914B2 (en) * 1980-11-20 1983-06-23 Ube Industries, Ltd. Gas venting incorporated with a mould
US5113984A (en) * 1990-01-18 1992-05-19 Chrysler Corporation Torque converter control valve in a fluid system of an automatic transmission
DE4302798C1 (de) * 1993-02-02 1994-06-16 Hodler F & Cie Fondarex Sa Ventileinrichtung zum Entlüften von Druckgiessformen
ATE240808T1 (de) * 1998-02-11 2003-06-15 V D S Vacuum Diecasting Servic Ventilvorrichtung, insbesondere entlüftungsventil-vorrichtung für den druckguss
ATE246974T1 (de) * 1999-01-06 2003-08-15 Fondarex Sa Ventileinrichtung

Also Published As

Publication number Publication date
US6823930B2 (en) 2004-11-30
US20030056931A1 (en) 2003-03-27
RU2002125441A (ru) 2004-03-20
TW539818B (en) 2003-07-01
ATE343443T1 (de) 2006-11-15
DE50208528D1 (de) 2006-12-07
HU0202569D0 (fr) 2002-10-28
IL151266A0 (en) 2003-04-10
KR20030025799A (ko) 2003-03-29
ZA200206480B (en) 2003-04-10
SG113433A1 (en) 2005-08-29
JP4256647B2 (ja) 2009-04-22
NO20024535L (no) 2003-03-24
MXPA02009193A (es) 2003-03-27
HUP0202569A2 (hu) 2003-03-28
PL356118A1 (en) 2003-03-24
NO20024535D0 (no) 2002-09-20
EP1295655A1 (fr) 2003-03-26
BR0203816A (pt) 2003-06-03
JP2003136191A (ja) 2003-05-14
CN1409036A (zh) 2003-04-09
CA2398535A1 (fr) 2003-03-21
IL151266A (en) 2010-12-30

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