EP0030669A1 - Dispositif pour la coulée automatique sous basse pression - Google Patents

Dispositif pour la coulée automatique sous basse pression Download PDF

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Publication number
EP0030669A1
EP0030669A1 EP80107483A EP80107483A EP0030669A1 EP 0030669 A1 EP0030669 A1 EP 0030669A1 EP 80107483 A EP80107483 A EP 80107483A EP 80107483 A EP80107483 A EP 80107483A EP 0030669 A1 EP0030669 A1 EP 0030669A1
Authority
EP
European Patent Office
Prior art keywords
station
casting
molds
immersion
mold
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.)
Withdrawn
Application number
EP80107483A
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German (de)
English (en)
Inventor
Günter Phillipps Obering
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.)
Russ-Elektroofen Produktions- & Co KG GmbH
Original Assignee
Russ-Elektroofen Produktions- & Co KG 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 Russ-Elektroofen Produktions- & Co KG GmbH filed Critical Russ-Elektroofen Produktions- & Co KG GmbH
Publication of EP0030669A1 publication Critical patent/EP0030669A1/fr
Withdrawn legal-status Critical Current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
    • B22D47/00—Casting plants
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D18/00—Pressure casting; Vacuum casting
    • B22D18/04—Low pressure casting, i.e. making use of pressures up to a few bars to fill the mould

Definitions

  • the object of the invention is to fully or at least largely automate the known manual casting processes in which a number of casting molds arranged on a casting carousel are successively filled with metal, i.e.
  • To limit the use of human labor for example, to the simple insertion of mold cores and the monitoring of the device, or to completely forego human activity during the course of the process.
  • the invention uses a low-pressure casting furnace known per se (DE-PS 20 41 588, DE-C S 21 28 425) in a modification which has been adapted in particular with regard to the automatic function of the invention.
  • the movement of the molds on the circular path is interrupted when one of them is in the demolding station.
  • the opened mold can be subjected to violent vibration in the demolding station.
  • the invention also relates to a device for carrying out the aforementioned method, which is characterized by a turntable, on the periphery of which a number of identical or different molds with associated devices for automatic opening and closing, tilting, and lifting and lowering of the molds are arranged at regular intervals. and around which a casting station with a known low-pressure furnace with riser pipe and furnace nozzle, an immersion station with an immersion bath and a preparation station and between the casting furnace and the immersion bath are grouped a demolding station; a drive for moving the molds from station to station and a control system for automatically triggering the individual functions.
  • the known low-pressure casting furnace is preferably provided with a siphon-like filling chamber, the connection of which to the metering chamber is below the lowest level of the molten metal, as a result of which an escape of the protective gas used as pressure medium for the casting during refilling of the oven is prevented.
  • the advantages of the invention lie not only in the saving of operating personnel, but at most a man for inserting the cores and the over of the system is necessary, but also in that it saves the workplaces that were physically exhausting, uncomfortable and also not physically demanding in the usual manual casting process with casting carousels, from which the invention is based, namely manual handling of the molten metal and the associated noise, heat and exhaust emissions.
  • the invention thus also meets modern demands for humanization of the workplace and relief for the environment.
  • the adaptation of the low-pressure casting process to the automatic mode of operation brings the advantages of a controllable mold filling, the control of the solidification in the base storage position of the casting, the limitation of the burn-up to a minimum and the reduction of the circulating proportion, a uniformly good one Casting quality, reduced risk of foaming due to casting under a protective gas atmosphere and metal savings in the gate and feed system.
  • the mold 1 which consists of two halves 1a and 1b, is in the closed position in the casting station G (FIGS. 3 and 9) and is on the furnace nozzle of the low-pressure casting furnace 2 lowered.
  • This is filled with molten metal 3 and has a cylindrical metering chamber 5 above the melting mirror 4, which is filled with a protective gas, for example nitrogen.
  • the placement of the mold 1 automatically increases the protective gas pressure in the metering chamber 5 by means of a magnetic valve, as a result of which the melting level 4 is lowered and the molten metal 3 slowly through the riser pipe 6 and the furnace nozzle 7, which, depending on the type and complexity of the castings to be produced, as usual, can be designed as an immersion or, as shown, as a multiple nozzle, into the cavities 8 of the mold 1 corresponding to the castings.
  • the parameters of casting speed and casting time which are decisive for void-free casting, can be used for different molds as part of the automatic control can be freely programmed.
  • the gas pressure is reduced again, and the non-solidified metal in the furnace nozzle drops, while the melting level 4 in the metering chamber rises at the same time.
  • the protective gas removed from the dosing chamber during this process is absorbed without loss by a special container. After the casting process, the mold 1 is automatically lifted from the furnace.
  • the low pressure casting furnace 2 is designed as an induction channel furnace with a melting channel 9, coil 10 and iron yoke 11.
  • the melting chamber of the induction channel furnace is formed here by the metering chamber 5 located above the channel 9.
  • a displacement body 12 is used, which is automatically readjusted by means of a rod 13 from a working cylinder 14, not shown, depending on the volume of the casting.
  • the displacer 12 After a certain number of castings, the displacer 12 reaches a predetermined lowest position, in which a signal is triggered which signals the need to refill the casting furnace 2 and at the same time sets the displacer 12 in its uppermost position.
  • the pouring furnace is filled with liquid metal via a s i Filling chamber 15 arranged in a phonetic manner, the connection 16 of which to the metering chamber 5 lies below the lowest level 17 of the molten metal 3. This prevents the protective gas from escaping from the metering chamber 5 when the working cover 18 of the filling chamber 15 is opened.
  • the direct connection of a melting furnace has proven to be an economical solution for a clean transfer of the melted material into the low-pressure casting furnace, which can be designed both as a fixed compressed-air-empty furnace and as a tilting furnace. So much metal is refilled through the filling chamber 15 until the melting mirror 4 has reached a predetermined height when the displacement body 12 is in the uppermost position.
  • a second opened mold 1 ' is located in an immersion station T (FIGS. 3, 10, 11, 12), where it is lowered from the raised position shown in FIG. 10 to the position shown in FIG. 11 immersion bath 20 contained in a plunge pool 19 is immersed.
  • the immersion bath e.g. a size bath is equipped with an agitator and can also be preheated by a built-in heater (both not shown).
  • the immersion depth and the immersion time are pre-programmed depending on the size of the mold so that the mold temperature remains constant.
  • a third mold 1 is located during the above-described processes in the partially opened position shown in FIG. 13 and tilted into the horizontal position in a preparation station V (FIGS. 3 and 14) in which an operator, who is primarily responsible for the smooth operation of the automatic operations are monitored, the mold can be blown out with compressed air and the casting cores can be inserted, provided that these operations are not carried out automatically.
  • the invention is not limited to the arrangement shown in FIG. 3 with three molds 1, 1 ', 1' 'distributed on the turntable 21 at an angle of 120 °, but between them with a correspondingly larger turntable diameter one or more additional molds can be provided.
  • the filled mold 1 After leaving the casting station G, the filled mold 1 is reached before reaching the immersion station T in a demolding station (FIG. 3) opens and empties, taking the position shown in Fig. 10.
  • the mold 1 'coming from the size bath is brought into the semi-open horizontal position shown in FIG. 13 during this movement on a circular path, while the third mold 1''is closed and pivoted vertically, after which it reaches the casting station G after it has been reached the furnace nozzle is lowered.
  • the castings are ejected according to the invention in that the opened mold is subjected to violent vibration in the demolding station.
  • compressed air knockers 22 are used on clamping plates 23 (FIG. 11) to which the mold halves 1a and 1b are exchangeably fastened, for example by screws.
  • the demolded castings fall on a conveyor belt. 24 (Fig. 3).
  • the conveyor belt 24 moves the castings over a cooling section in the direction of a collecting container. It can be controlled in such a way that it automatically switches on after the cast parts are ejected and transports them to the collecting container in cycles.
  • the removal can be adapted to the existing working conditions, whereby there is not only the possibility to extend the cooling section, but by extending the conveyor belt to the To give the operator the opportunity to carry out intermediate checks on the castings by switching the direction of the conveyor belt.
  • the demolding station E In order to ensure that the cast parts on the conveyor belt 24 are accurately ejected, it may be expedient to briefly stop the circulation of the molds in the demolding station E. If you do not work with three or a multiple of three molds, but instead with four or a multiple of four molds, as shown, you can arrange the casting station, the immersion station, the preparation station and the demolding station offset by 90 ° , so that during a casting cycle the previously filled mold is automatically located in the demolding station E located between the casting station G and the immersion station T.
  • the demolding station E be placed at the immersion station T.
  • the automatic control of the process sequence can be programmed so that the program ends when a mold has arrived in the preparation station and has to be started again by the operator, or it can run fully automatically with pre-programmed downtimes in the mentioned stations after starting until it is canceled by the operator or automatically due to a fault message.
  • the individual molds perform a series of opening and closing, tilting, as well as lifting and lowering movements which, controlled by electrically or electronically programmed pneumatic or hydraulic systems, the control details of which are not the subject of the present invention can be realized, for example with the aid of the following, in particular with reference to the arrangements described in FIGS. 11, 12 and 14.
  • the two mold halves 1a and 1b are fastened to clamping plates 23, on which the compressed air knockers 22, which have also already been described, are attached.
  • the clamping plates 23 are in turn via strips 25 with closing plates 26 connected, which are articulated with the aid of pins 27 on bearing plates 28.
  • Locking cylinders 29 are also arranged between these bearing plates 28 and movable in pivot bearings 30.
  • the ends of the piston rods 31 of the locking cylinders 29 are articulated on the locking plates 26 by means of pins 32. Extending the piston rods 31 of the locking cylinders 29 causes the locking plates 26 and thus the molds 1a and 1b to pivot about the pins 27 into the open position shown in FIGS. 10 and 11, while the retraction of the piston rods swings back into the 8 results in the closed position shown.
  • 13 shows the lower locking cylinder with the piston rod 31 retracted and the upper one with the piston rod 31 extended, and accordingly one of the molds (1a) in the closed position and the other (1b) in the open position.
  • the described pivoting device is already sufficient to open and close the molds 1, i.e. the casting, the demolding, the diving (with an additional lowering movement described later) and, apart from the tilting movement also described later, possibly also the preparation of the mold, it is particularly expedient in view of the preparation station V shown in FIGS. 13 and 14 to additionally provide a possibility by which the mold halves 1a and 1b can be moved towards and away from each other.
  • the bearing plates 28 on j are e-weils a die half 1a, 1b associated support plates 33 and 34 attached, which are interconnected by telescopic cylinders 35 provided on both sides of the locking cylinder 29, with the aid of which the plates 33 and 34 and with them the locking systems of the mold halves 1a and 1b can be approximated and removed from one another.
  • the support plate 33 assigned to the mold half 1 a is connected to the upper ends of the guide bars 40 via frame parts 36, 3% and 38 and to the lower ends via angle pieces 39.
  • the ends of the piston rods 41 of hydraulic lowering cylinders 42 also engage on the angle pieces 39, which are fastened on projecting tabs 43, which in turn are parts of guide blocks 44 for the bars 40. Extending the piston rods 41 thus causes, as shown in FIG.
  • a swivel cylinder 48 serves this purpose, the end of which is fastened to the end shield 46 by means of a pin 49, while its piston rod 50 engages via a pin 51 on a swivel plate 52 which is rigidly connected to one of the guide blocks 44.
  • the end shields 46 and 47 are fastened to the turntable 21 by means of screws 53.
  • the above-mentioned working cylinders are controlled by pneumatic or hydraulic systems by means of valves controlled by electrical or electronic programming.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Devices For Molds (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
EP80107483A 1979-12-15 1980-11-29 Dispositif pour la coulée automatique sous basse pression Withdrawn EP0030669A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2950597 1979-12-15
DE19792950597 DE2950597A1 (de) 1979-12-15 1979-12-15 Automatisiertes niederdruckgiessverfahren und vorrichtung zu seiner durchfuehrung

Publications (1)

Publication Number Publication Date
EP0030669A1 true EP0030669A1 (fr) 1981-06-24

Family

ID=6088620

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80107483A Withdrawn EP0030669A1 (fr) 1979-12-15 1980-11-29 Dispositif pour la coulée automatique sous basse pression

Country Status (3)

Country Link
US (1) US4431046A (fr)
EP (1) EP0030669A1 (fr)
DE (1) DE2950597A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19613668C1 (de) * 1996-04-04 1997-05-28 Gustav Ohnsmann Gießanlage und Verfahren zur Herstellung von Gußstücken
EP0824983A1 (fr) * 1996-08-23 1998-02-25 Kwc Ag Dispositif de la coulée en coquille à basse pression
DE19900574A1 (de) * 1999-01-09 2000-07-13 Georg Fischer Disa Ag Verfahren und Vorrichtung zum steigenden Gießen von Leichtmetall
CN100503086C (zh) * 2006-09-25 2009-06-24 福建东亚机械有限公司 三工位半自动活塞环造型机
AT511300A1 (de) * 2011-02-09 2012-10-15 Fill Gmbh Giessverfahren sowie giessanlage zur herstellung von werkstücken
CN102847884A (zh) * 2012-09-06 2013-01-02 常德奇彩科技有限公司 一种双工位气压移动造型机

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2171626B (en) * 1985-02-25 1988-10-19 Ube Industries Die casting apparatus
EP0215153A1 (fr) * 1985-09-19 1987-03-25 RUSS-Elektroofen Produktions- Gesellschaft mbH & Co. KG Installation de la coulée à basse pression pour le moulage en coquille
EP0315801A3 (fr) * 1987-11-10 1990-05-30 Ube Industries, Ltd. Appareil à couleur sous pression
US4977946A (en) * 1990-05-25 1990-12-18 General Motors Corporation Differential pressure, countergravity casting of individual charges of melt from a casting basin
US5465777A (en) * 1994-05-18 1995-11-14 The Budd Company Contact pouring
US6068043A (en) * 1995-12-26 2000-05-30 Hot Metal Technologies, Inc. Method and apparatus for nucleated forming of semi-solid metallic alloys from molten metals
IT1283090B1 (it) * 1996-06-04 1998-04-07 Imr Srl Impianto di colata in conchiglia a bassa pressione,a potenzialita' incrementata
US6513571B1 (en) 1998-05-27 2003-02-04 Hayes Lemmerz International, Inc. Apparatus for automatic refilling of a low pressure casting machine
WO2001045878A2 (fr) * 1999-10-25 2001-06-28 Tei Tooling & Equipment International Appareil et procede de moulage par coulee
ES2184582B1 (es) * 2000-11-24 2004-08-16 Caspro, S.A. Sistema para obtener por fundicion piezas de griferia y similares.
DE102004016575A1 (de) * 2004-03-31 2005-10-27 Georg Fischer Kokillenguss GmbH Kokillengiessanlage
DE102004016574A1 (de) * 2004-03-31 2005-10-27 Georg Fischer Kokillenguss GmbH Kokillengiessanlage
EP2060340A1 (fr) * 2007-11-06 2009-05-20 Georg Fischer Automotive AG Dispositif et procédé de coulage basse pression de métal en fusion

Citations (3)

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US3698471A (en) * 1969-10-15 1972-10-17 Renault Automatically operated multiple cavity die for low-pressure chill-casting
DE2548215A1 (de) * 1974-11-04 1976-05-13 Activite Atom Avance Niederdruck-schnellgussanlage
DE2438060B2 (de) * 1973-08-10 1976-11-11 Kohaszati, Gyarepitö Vallalat, Budapest Niederdruckgiessanlage

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US1663693A (en) * 1928-03-27 Piston-casting machine
US1078446A (en) * 1913-06-03 1913-11-11 Charles R Starker Collapsible core-bar.
US1219358A (en) * 1915-11-20 1917-03-13 John K Stewart Method of molten-metal feed for die-casting.
US1403955A (en) * 1920-05-26 1922-01-17 Hill Harriet Apparatus for die-casting metals
US1645726A (en) * 1923-09-01 1927-10-18 Permold Co Mold
US1722414A (en) * 1926-12-13 1929-07-30 Aluminum Co Of America Molding machine
US2070649A (en) * 1933-02-18 1937-02-16 Thompson Prod Inc Apparatus for molding pistons
US2015975A (en) * 1934-05-15 1935-10-01 Sulprizio Deuta Piston mold apparatus
US2181157A (en) * 1938-11-16 1939-11-28 Aluminum Co Of America Method and apparatus for pressure casting
US2254295A (en) * 1938-12-17 1941-09-02 Aluminum Co Of America Mold
US2496130A (en) * 1942-05-23 1950-01-31 Louis H Morin Method of casting separable fastener stringers
US2487703A (en) * 1947-04-05 1949-11-08 C L Gougler Machine Company Press for molding battery boxes
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US2520348A (en) * 1947-12-05 1950-08-29 Ajax Engineering Corp Discharging apparatus
US2579952A (en) * 1950-06-16 1951-12-25 Louis H Morin Method of forming threaded die castings
US2711568A (en) * 1951-09-07 1955-06-28 Bohn Aluminium & Brass Corp Permanent mold apparatus for casting hollow articles
US2965938A (en) * 1956-06-21 1960-12-27 Permanent Mold & Die Co Inc Apparatus for casting pistons and the like
US3049768A (en) * 1959-04-30 1962-08-21 Gen Motors Corp Apparatus and process for casting pistons
FR1370603A (fr) * 1963-04-05 1964-08-28 Renault Machine semi-automatique pour le moulage en coquille de pièces creuses telles que les pistons
US3273210A (en) * 1963-11-07 1966-09-20 Taccone Corp Machine for removing molds from flasks
US3318370A (en) * 1964-07-02 1967-05-09 American Radiator & Standard Apparatus for casting thin-walled cast iron parts
DE2128425A1 (de) * 1970-08-21 1973-01-04 Friedhelm Dipl Ing Kahn Giessverfahren mit druckanwendung und einrichtung zur durchfuehrung des verfahrens
SU360146A1 (fr) * 1971-04-13 1971-11-30 Научно исследовательский
US3765474A (en) * 1971-06-14 1973-10-16 Rimrock Corp Article forming machine and extractor
US3866666A (en) * 1972-10-03 1975-02-18 Prince Corp Die casting apparatus
JPS5376127A (en) * 1976-12-17 1978-07-06 Hitachi Metals Ltd Horizontal low pressure casting machine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3698471A (en) * 1969-10-15 1972-10-17 Renault Automatically operated multiple cavity die for low-pressure chill-casting
DE2438060B2 (de) * 1973-08-10 1976-11-11 Kohaszati, Gyarepitö Vallalat, Budapest Niederdruckgiessanlage
DE2548215A1 (de) * 1974-11-04 1976-05-13 Activite Atom Avance Niederdruck-schnellgussanlage

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19613668C1 (de) * 1996-04-04 1997-05-28 Gustav Ohnsmann Gießanlage und Verfahren zur Herstellung von Gußstücken
EP0824983A1 (fr) * 1996-08-23 1998-02-25 Kwc Ag Dispositif de la coulée en coquille à basse pression
DE19900574A1 (de) * 1999-01-09 2000-07-13 Georg Fischer Disa Ag Verfahren und Vorrichtung zum steigenden Gießen von Leichtmetall
CN100503086C (zh) * 2006-09-25 2009-06-24 福建东亚机械有限公司 三工位半自动活塞环造型机
AT511300A1 (de) * 2011-02-09 2012-10-15 Fill Gmbh Giessverfahren sowie giessanlage zur herstellung von werkstücken
AT511300B1 (de) * 2011-02-09 2019-03-15 Fill Gmbh Giessverfahren sowie giessanlage zur herstellung von werkstücken
CN102847884A (zh) * 2012-09-06 2013-01-02 常德奇彩科技有限公司 一种双工位气压移动造型机

Also Published As

Publication number Publication date
DE2950597A1 (de) 1981-07-02
US4431046A (en) 1984-02-14

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