EP0074496B1 - Dispositif de vanne, en particulier pour machine à moulage sous pression - Google Patents

Dispositif de vanne, en particulier pour machine à moulage sous pression Download PDF

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Publication number
EP0074496B1
EP0074496B1 EP82107315A EP82107315A EP0074496B1 EP 0074496 B1 EP0074496 B1 EP 0074496B1 EP 82107315 A EP82107315 A EP 82107315A EP 82107315 A EP82107315 A EP 82107315A EP 0074496 B1 EP0074496 B1 EP 0074496B1
Authority
EP
European Patent Office
Prior art keywords
valve
control
arrangement according
threaded bush
stroke
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
Application number
EP82107315A
Other languages
German (de)
English (en)
Other versions
EP0074496A1 (fr
Inventor
Hans Gebhard Krines
Hans-Jürgen Müller
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.)
Vickers Systems GmbH
Original Assignee
Vickers Systems GmbH
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 Vickers Systems GmbH filed Critical Vickers Systems GmbH
Publication of EP0074496A1 publication Critical patent/EP0074496A1/fr
Application granted granted Critical
Publication of EP0074496B1 publication Critical patent/EP0074496B1/fr
Expired 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
    • B22D17/32—Controlling equipment

Definitions

  • the invention relates to a valve arrangement, in particular for die casting machines, with the features of the preamble of claim 1.
  • the invention has for its object to form a valve assembly of the generic type so that the adjustment of the threaded bushing is possible with relatively small forces.
  • the flanks of the threads of the threaded bushing and the valve housing which lie one on top of the other, separate from one another with each switching cycle of the valve cone, so that the thread flanks are inevitably lubricated from adjacent oil pressure spaces.
  • the threads therefore remain easy to move.
  • the direct drive can be done by hand without the use of large handwheels or a motor drive does not require a gear ratio, rather the use of a stepping motor with low torque in the direct drive is sufficient.
  • the solution according to the invention is thus space-saving and can be implemented with simple means.
  • the entire valve mechanism of the device according to the invention is designed as a cylindrical cartridge and forms an interchangeable structural unit with the individual valve parts described below.
  • the bore 2 of the housing is z. B. with a feed line, not shown, of a pressure accumulator of a die casting machine in connection, while the axial bore 3 is connected to the cylinder space.
  • the holes 2 and 3 can also serve another purpose.
  • the annular valve seat 4 is formed by the inner end of the bore 3; the screwed-in head surface 5 of the valve cone 6 bears against it when the valve is closed.
  • the arrangement and design of the valve seat 4 and the screwed-in head surface 5 is such that, when the valve is closed, the pressure in the line 2 and the annular chamber 2a can act on the projected diameter surface of the section 5a of the head surface 5.
  • the housing 1 has a further bore 7, which can also be closed with respect to the bore 3 by the valve cone 6.
  • This has a hollow cylindrical shape and is guided with its outer wall on a section 8 of the longitudinal bore 9 of the housing.
  • the rear end of the valve cone 6 has a ring-like outward reinforcement 10, just as the bore 9 has a corresponding extension 11.
  • an annular shoulder 12 is formed on the housing and an annular shoulder 13 on the valve cone 6, between which a corresponding annular space is created in the enlargement 11 of the bore 9 and is kept depressurized via the bore 14.
  • the rear reinforcement 10 increases the effective rear end face compared to the front effective end face of the valve cone 6.
  • the inner wall of the hollow valve cone 6 also forms a shoulder 15 which forms the abutment of a spring 16 described in more detail below.
  • the enlargement 11 of the bore 9 merges into a valve chamber 17, into which a bore 18 opens, which is connected via a first check valve 19 and a second opposing check valve 20 to a bore 21, which in turn via the bores 22, 23 with another Chamber 24 communicates.
  • the head 25 of a threaded bushing 26 is arranged so that it can move and be sealed.
  • Its end face 27 (FIG. 2), like the rear end face 28 of the valve cone 6, is under the effect of the pressure in the chamber 17 and the bore 18.
  • the threaded bushing 26 engages with the external thread in the internal thread 29 of the valve housing 1.
  • the rear end face 30 of the threaded bushing 26 (FIG. 2) is under the effect of the pressure in the chamber 31, which also prevails in the bore 21 and also through the bores 22, 23 in the chamber 24, which are formed by the shoulders 32, 33 of the threaded bushing is axially limited.
  • Is against the end face 27 of the threaded bush the second end of the axial pressure spring 16, which can optionally also be equipped with an axial pressure bearing to reduce the rotational friction forces.
  • the shaft 34 of the adjustment drive for the threaded bushing 26 provided with the general reference number 35 is mounted.
  • the shaft 34 is connected via a coupling part 36 to the drive shaft 37 of the adjusting drive arranged in the housing 38.
  • B. can be a low torque stepper motor.
  • the front end of the shaft 34 extends in a sealed manner into the interior 39 of the valve cone 6 and is enclosed by the spring 16.
  • the threaded bush 26 which is connected to the threaded shaft in a rotationally fixed manner.
  • the threaded bushing 26 can be connected to the shaft 34 via a plurality of rows of axial balls 40. According to FIG.
  • the parts 26 and 34 can be connected in a rotationally fixed manner via a rotary wedge 41, which engages in a corresponding groove 42 of the threaded bush 26, while according to FIG. 3c the torsional strength of the threaded bush 26 and the shaft 34 via springs and grooves 43, 44 can be accomplished.
  • valve cone 6 The interior 39 of the valve cone 6 as well as the interior of the shaft 34 is kept depressurized via a bore 45.
  • the valve cone 6 is guided, in addition to bearing against the wall of the bore 9 and the extension 11, by means of an axial rod 46 which is guided within the shaft 34.
  • this axial rod 46 is passed through the shaft 37 of the adjusting drive 35 and ends at the level of a displacement transducer 47, through which a position-controlled regulation of the valve cone 6 of the valve control described below can take place.
  • the check valve 19 acts as a differential pressure valve between the chamber 17 in front (ie in FIGS. 1 and 2 on the left) of the threaded sleeve 26 and the chamber 31 behind (ie on the right) of the threaded sleeve 26.
  • pressure is applied in the bore 21, it is in the chamber 31 this pressure, while in the chamber 17 there is a lower pressure caused by the check valve 19, as a result of which the threaded bushing 26 is pressed to the left in FIGS.
  • the enlarged head 25 of the sleeve carries two seals 25a and 25b, which can be designed as a ring or gap seal.
  • valve 1 provides a check valve 50 connected to the bore 7 as a control pressure safety valve so that the valve plug 6 remains closed even when the main pressure suddenly escapes through the bore 2.
  • An electrically operated, leak-free directional seat valve 51 connects to the valve 50 as a pilot stage for the sudden opening of the valve cone 6.
  • a flow control valve for the limited control oil supply for the slow opening and closing movement of the plug valve 6 is designated, which is connected to a check valve 53, which serves to separate the control oil flow between the directional seat valve 51 and the main control valve 54.
  • An electrically operated leakage-free directional seat valve 55 is connected to the outlet 62 of the main control valve 54, and a throttle valve 56 for manual preselection of the slow opening movement of the valve cone 6, which is connected to the bore 21 of the housing 1, is connected upstream.
  • the quick opening of the valve cone 6 can take place at any time during the slow opening process. If the directional seat valve 51 is switched on and the previously closed main control valve 54 is opened, the control current escapes from the chamber 17 via the check valve 20, the bore 21, the line 61 and the open main control valve 54 and the line 62 with the larger outflow cross section than that of the Throttle valve 56.
  • the throttle valve 56 and directional valve 55 is replaced here by an electrically, proportionally adjustable design with position control. This makes it possible to regulate the slow opening and closing of the valve cone 6 as desired, i. H. to achieve a target-actual value comparison of the valve cone 6 via the displacement sensor 47.
  • the main control valve 54 is opened quickly in the manner described above.
  • the electrically controllable directional seated valves 51 and 55 shown in FIG. 1 can optionally also be designed with pneumatic or hydraulic control.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lift Valve (AREA)
  • Safety Valves (AREA)
  • Fluid-Pressure Circuits (AREA)

Claims (7)

1. Agencement de soupape, notamment pour des machines de moulage sous pression, avec les particularités suivantes :
- dans un corps de soupape (1) est disposée une soupape principale comportant un cône de soupape (6), un piston de commande (10) et une butée de limitation de course (25) ;
- la butée de limitation de course (25) est manoeuvrable au moyen d'une transmission (26, 34), qui comporte un manchon fileté (26) et un filetage d'appui (48) situé sur le corps de soupape (1) ;
- un dispositif distributeur de commande (50 à 56), qui contient également des dispositifs d'étranglement (56), est relié par l'intermédiaire d'au moins un conduit de commande (61) à la soupape principale de manière que le cône de soupape (6) de celle-ci puisse exécuter un mouvement retardé ou un mouvement rapide ; caractérisé en ce que le manchon fileté (26) comporte des surfaces (27, 30, 33) sollicitées en pression, sur lesquelles agissent de façon antagoniste des forces de translation qui se développent - dans un sens d'appui ou dans un sens de desserrage - sur le manchon fileté (26) et dont la grandeur relative, de l'une à l'autre, varie à chaque cycle de commutation du cône de soupape (6).
2. Agencement de soupape selon la revendication 1, caractérisé en ce que les surfaces (30, 33) sollicitées en pression dans le sens du desserrage sont adjacentes aux dispositifs de chambre (31, 24) qui sont raccordés au conduit de commande (61) (en 21) et qui sont reliés par l'intermédiaire de clapets anti-retour (19, 20) branchés en antiparallèle à une chambre de commande de soupape (17), qui contient la surface (27) du manchon fileté (26) qui est sollicitée en pression dans le sens d'appui ainsi que le piston de commande (10).
3. Agencement de soupape selon la revendication 1 ou 2, caractérisé en ce que la butée de limitation de course (25) et le manchon fileté (26) forment un ensemble de construction unitaire, la butée de limitation de course (25) comportant d'un côté la surface (27) sollicitée en pression dans le sens d'appui et de l'autre côté une partie (33) des surfaces (30, 33) sollicitées en pression dans le sens de desserrage, lesquelles surface (27) et partie (33) de surface sont étanchéifiées l'une par rapport à l'autre (joint d'étanchéité 25a, 25b).
4. Agencement de soupape selon l'une des revendications 1 à 3, caractérisé en ce que la transmission (26, 34) comporte un arbre (34) auquel le manchon fileté (26) est relié de façon solidaire à la rotation mais avec possibilité de translation axiale.
5. Agencement de soupape selon la revendication 4, caractérisé en ce que l'arbre (34) est creux et reçoit un axe (46) dont une extrémité est reliée au cône de soupape (6) tandis que l'autre extrémité fait partie d'un capteur de course (47).
6. Agencement de soupape selon une des revendications 1 à 5, caractérisé en ce que la butée de limitation de course (25) est agencée simultanément comme un contre-appui pour un ressort (16) de la soupape principale.
7. Agencement de soupape selon une des revendications 1 à 6, caractérisé en ce que le dispositif distributeur de commande (50 à 56) comporte un conduit (7) d'alimentation en pression pouvant être obturé (distributeur 51), une chaîne formée d'une valve de régulation de débit (52) et d'un étranglement réglable (56), au point de jonction desquels est relié le conduit de commande (61), et une soupape de décharge (54) qui, lorsque le conduit d'alimentation en pression (7) est obturé, s'ouvre de façon brusque et supprime la pression dans le conduit de commande (61) alors que, lorsque le conduit d'alimentation en pression (7) est mis en communication, de l'huile sous pression est introduite dans le conduit de commande (61) par l'intermédiaire de la valve de régulation de débit (52) et le cas échéant de l'huile sous pression est déchargée par l'intermédiaire de l'étranglement réglable (56).
EP82107315A 1981-08-20 1982-08-12 Dispositif de vanne, en particulier pour machine à moulage sous pression Expired EP0074496B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3132909 1981-08-20
DE19813132909 DE3132909A1 (de) 1981-08-20 1981-08-20 "ventilvorrichtung, insbesondere fuer druckgiessmaschinen

Publications (2)

Publication Number Publication Date
EP0074496A1 EP0074496A1 (fr) 1983-03-23
EP0074496B1 true EP0074496B1 (fr) 1985-03-13

Family

ID=6139710

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82107315A Expired EP0074496B1 (fr) 1981-08-20 1982-08-12 Dispositif de vanne, en particulier pour machine à moulage sous pression

Country Status (4)

Country Link
EP (1) EP0074496B1 (fr)
JP (1) JPS58103950A (fr)
CA (1) CA1192375A (fr)
DE (2) DE3132909A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH672672A5 (fr) * 1985-12-10 1989-12-15 Vaillant Gmbh
DE3819128C2 (de) * 1988-06-04 1995-10-26 Conducta Endress & Hauser Gasdetektionssystem
US5137254A (en) * 1991-09-03 1992-08-11 Caterpillar Inc. Pressure compensated flow amplifying poppet valve

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2058112A1 (de) * 1970-11-26 1972-05-31 Idra Pressen Gmbh Verfahren zur Steuerung der Zuschaltung des Multiplikators zum Presskolben an Multiplikator-Druckgiessmaschinen
DE7507129U (de) * 1975-08-28 Eglinski Geraetetechnik Kg Absperrgerät für hydraulische Systeme. 700903
DE7604336U1 (de) * 1976-02-14 1976-07-15 Varsek, Zdenko, Dipl.-Ing., 7500 Karlsruhe Ventilvorrichtung

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3159375A (en) * 1962-05-31 1964-12-01 Greenlee Bros & Co Flow control valve
US4011902A (en) * 1973-10-08 1977-03-15 Gebrueder Buehler Ag Device for pressure casting
IT1005917B (it) * 1974-04-02 1976-09-30 Italpresse Spa Dispositivo di comando della valvola di chiusura dell accumula tore in un pressa oleodinamica per lo stampaggio ad iniezione di corpi metallici
DE2737153A1 (de) * 1977-08-17 1979-03-01 Idra Pressen Gmbh Ventil zur beeinflussung des druckmittels an druckgiessmaschinen
FR2444828A1 (fr) * 1978-12-18 1980-07-18 Heurtey Metallurgie Perfectionnements apportes aux verins

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7507129U (de) * 1975-08-28 Eglinski Geraetetechnik Kg Absperrgerät für hydraulische Systeme. 700903
DE2058112A1 (de) * 1970-11-26 1972-05-31 Idra Pressen Gmbh Verfahren zur Steuerung der Zuschaltung des Multiplikators zum Presskolben an Multiplikator-Druckgiessmaschinen
DE7604336U1 (de) * 1976-02-14 1976-07-15 Varsek, Zdenko, Dipl.-Ing., 7500 Karlsruhe Ventilvorrichtung

Also Published As

Publication number Publication date
EP0074496A1 (fr) 1983-03-23
JPS58103950A (ja) 1983-06-21
DE3262555D1 (en) 1985-04-18
DE3132909A1 (de) 1983-03-03
CA1192375A (fr) 1985-08-27

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