WO2001060550A1 - Method and device for filling an injection chamber - Google Patents

Method and device for filling an injection chamber Download PDF

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Publication number
WO2001060550A1
WO2001060550A1 PCT/CH2001/000043 CH0100043W WO0160550A1 WO 2001060550 A1 WO2001060550 A1 WO 2001060550A1 CH 0100043 W CH0100043 W CH 0100043W WO 0160550 A1 WO0160550 A1 WO 0160550A1
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WO
WIPO (PCT)
Prior art keywords
casting chamber
riser pipe
filling
casting
inlet
Prior art date
Application number
PCT/CH2001/000043
Other languages
German (de)
French (fr)
Inventor
Gilbert Moret
Karl-Heinz Matheis
Original Assignee
Bühler Druckguss AG
Otto Junker 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 Bühler Druckguss AG, Otto Junker Gmbh filed Critical Bühler Druckguss AG
Priority to AU2001224972A priority Critical patent/AU2001224972A1/en
Publication of WO2001060550A1 publication Critical patent/WO2001060550A1/en

Links

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
    • B22D17/30—Accessories for supplying molten metal, e.g. in rations

Definitions

  • the invention relates to a method for filling a casting chamber of a die casting machine or the like with a molten metal in a metered amount according to the preamble of claim 1 and to such a device
  • a molten metal can be fed in a metered amount from the side or from below to the casting chamber.Dosing from below has advantages.
  • a melting furnace as a storage container can be stored at floor level, but then the molten metal then enters the casting chamber via a suction or riser pipe must be required
  • the DE-A-3050183 describes a metering device for batch-wise metered Request ofbigigem metal, in which a crucible has a Dosierbehalter with a check valve and a dosing the dosing is detachable and sealingly fitted onto the check valve to allow an empty de r metering A
  • the outlet opening of the metering line is connected to the casting chamber in a manner not specifically disclosed in order to supply metal in batches, the ascending metering line being trimmed
  • a casting chamber is closed by a slide transversely to the direction of movement of the casting piston, and part of the slide is designed as a pivotable closure flap Pouring chamber on
  • DE-A-4123464 discloses a method for undocking the suction or riser pipe of the metering line. This undocking should take place after a predeterminable number of casting cycles, preferably after each casting cycle. Such a procedure is complex and wear-intensive
  • the invention is therefore based on the object of developing a method for filling a casting chamber of a die casting machine, which largely avoids the disadvantages of the prior art and ensures safe metering from below. This object is achieved on the basis of the features of the characterizing part of patent claim 1.
  • Advantageous refinements are disclosed in the subclaims.
  • Another object of the invention is to provide a suitable device for safe dosing from below.
  • suction or riser pipe can remain permanently on or in the filling opening of the casting chamber, but is only pressed against the casting chamber in a sealing manner during the metering process.
  • the movement forces of the die casting machine then do not act on the suction or riser pipe.
  • the separating movement in turn only has to be so great that forces can no longer be transmitted.
  • the invention is described in more detail in an exemplary embodiment with reference to a drawing.
  • the drawing shows a basic illustration of the arrangement according to the invention.
  • a riser pipe 1 of a metal melt reservoir, not shown here, aluminum, is arranged at an inlet 2 of a filling opening of a casting chamber 4, in the example of a cold chamber die casting machine.
  • level 3 of the melt is at a zero level. All parts that constantly come into contact with aluminum below this level should preferably have contact surfaces with the aluminum made of a ceramic. The surfaces in contact with the liquid metal should have a repellent effect in order to keep these surfaces clean.
  • a ceramic lining is also advantageous above level 3.
  • the riser pipe 1 (metering pipe) should preferably have such an inclination above the level 3 that the metal can flow back well and exclude the entry of air. While the casting chamber 4 is being filled, a parting line 7 between a docking piece 6 of the riser pipe 1 and the inlet 2 must not be firmly connected. A separating movement 5 only has to be so great that no forces can be transmitted, inter alia, from the casting chamber 4 or the die casting machine
  • the riser pipe 1 is preferably lowered.
  • the entire system can be vertically movable. In both cases, a flat joint 7 is possible. If the riser pipe 1 is sufficiently elastic, its deformability can be used, in which case a non-plane joint 7 may be required
  • the vertical separation movement is less than 5 mm in order to avoid horizontal movement
  • the inner wall of the casting chamber 4 and the inlet 2 can be partially protected. In the casting chamber 4 this is done by a ceramic protective tube and in the inlet 2 by a ceramic sleeve and a sealing washer in the area of the parting line 7
  • Hydraulic or pneumatic cylinders are preferably used as actuators for the separating movement during the filling process. These cylinders are connected to the riser pipe 1 and the casting chamber 4 by means of a pressing device (not shown)
  • the invention is not limited to the embodiment shown, in particular different arrangement variants of the actuator of the pressing device can be derived professionally from the aforementioned embodiments

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)

Abstract

The invention relates to a method and a device for filling an injection chamber of a pressure die casting machine or similar with a dosed quantity of molten metal. The aim of the invention is to permit the secure coupling of a riser during a dosage from below. To achieve this, the connection between the riser (1) and the inlet (2) of the fill-opening of the injection chamber does not transmit any forces during the filling operation.

Description

Verfahren und Vorrichtung zum Befullen einer Giesskammer Method and device for filling a casting chamber
Die Erfindung betrifft ein Verfahren zum Befullen einer Giesskammer einer Druckgussmaschine oder dergleichen mit einer Metallschmelze in dosierter Menge gemass αes Oberbegriffs des Patentanspruchs 1 sowie eine solche VorrichtungThe invention relates to a method for filling a casting chamber of a die casting machine or the like with a molten metal in a metered amount according to the preamble of claim 1 and to such a device
Bei Druckgussmaschinen kann ein geschmolzenes Metall in dosierter Menge von oben seitlich oder von unten der Giesskammer zugeführt werden Eine Dosierung von unten weist Vorteile auf Ein Schmelzeofen als Vorratsbehalter kann auf Bodenniveau gelagert werden, wobei dann allerdings die Metallschmelze über ein Saug- oder Steigrohr in die Giesskammer gefordert werden mussIn the case of die casting machines, a molten metal can be fed in a metered amount from the side or from below to the casting chamber.Dosing from below has advantages.A melting furnace as a storage container can be stored at floor level, but then the molten metal then enters the casting chamber via a suction or riser pipe must be required
Die DE-A-3050183 beschreibt eine Dosiereinrichtung zum chargenweisen dosierten Fordern von flussigem Metall, bei der ein Tiegel einen Dosierbehalter mit einem Rückschlagventil und einer Dosierleitung aufweist Die Dosierleitung ist abnehmbar und auf dem Rückschlagventil abdichtend aufsetzbar, um ein entleeren der Dosierleitung zu ermöglichen Eine Auslassoffnung der Dosierleitung wird mit der Giesskammer in nicht naher offenbarter Weise verbunden, um Metall chargenweise zuzuführen, wobei αie aufsteigende Dosierleitung gestutzt istThe DE-A-3050183 describes a metering device for batch-wise metered Request of flussigem metal, in which a crucible has a Dosierbehalter with a check valve and a dosing the dosing is detachable and sealingly fitted onto the check valve to allow an empty de r metering A The outlet opening of the metering line is connected to the casting chamber in a manner not specifically disclosed in order to supply metal in batches, the ascending metering line being trimmed
Bei einer Druckgiessmaschine gemass der DE-A-3504504 wird eine Giesskammer durch einen Schieber quer zur Bewegungsrichtung des Giesskolbens verschlossen wobei ein Teil des Schiebers als schwenkbare Verschlussklappe ausgebildet ist Weiterführend weist die EP-A-285687 ein Andocksystem für eine schnelle Abkopplung der Dosierleitung von der Giesskammer aufIn a die casting machine in accordance with DE-A-3504504, a casting chamber is closed by a slide transversely to the direction of movement of the casting piston, and part of the slide is designed as a pivotable closure flap Pouring chamber on
Die DE-A-4123464 offenbart hierzu ein Verfahren zur Abdockung des Saug- bzw Steigrohres der Dosierleitung Dieses Abdocken soll jeweils nach einer vorgebbaren Anzahl von Giesszyklen, vorzugsweise nach jedem Giesszyklus erfolgen. Eine solche Verfahrensweise ist aufwandig und verschleissintensiv Der Erfindung liegt daher die Aufgabe zugrunde, ein Verfahren zum Befullen einer Giesskammer einer Druckgussmaschine zu entwickeln, welches die Nachteile des Standes der Technik weitestgehend vermeidet und ein sicheres Dosieren von unten gewährleistet. Diese Aufgabe ist an Hand der Merkmale des Kennzeichens des Patentanspruchs 1 gelöst. Vorteilhafte Ausgestaltungen sind in den Unteransprüchen offenbart.DE-A-4123464 discloses a method for undocking the suction or riser pipe of the metering line. This undocking should take place after a predeterminable number of casting cycles, preferably after each casting cycle. Such a procedure is complex and wear-intensive The invention is therefore based on the object of developing a method for filling a casting chamber of a die casting machine, which largely avoids the disadvantages of the prior art and ensures safe metering from below. This object is achieved on the basis of the features of the characterizing part of patent claim 1. Advantageous refinements are disclosed in the subclaims.
Eine weitere Aufgabe der Erfindung besteht darin, eine geeignete Vorrichtung zum sicheren Dosieren von unten zu schaffen.Another object of the invention is to provide a suitable device for safe dosing from below.
Es wurde gefunden, dass das Saug- bzw. Steigrohr ständig an bzw. in der Einfüllöffnung der Giesskammer verbleiben kann aber nur während des Dosiervorganges abdichtend gegen die Giesskammer gedrückt wird. Die Bewegungskräfte der Druckgussmaschine wirken dann nicht auf das Saug- bzw. Steigrohr. Die Trennbewegung wiederum muss nur so gross sein, dass Kräfte nicht mehr übertragen werden können.It was found that the suction or riser pipe can remain permanently on or in the filling opening of the casting chamber, but is only pressed against the casting chamber in a sealing manner during the metering process. The movement forces of the die casting machine then do not act on the suction or riser pipe. The separating movement in turn only has to be so great that forces can no longer be transmitted.
Die Erfindung wird nachfolgend in einem Ausführungsbeispiel an Hand einer Zeichnung näher beschrieben. Die Zeichnung zeigt eine Prinzipdarstellung der erfindungsgemä- ssen Anordnung.The invention is described in more detail in an exemplary embodiment with reference to a drawing. The drawing shows a basic illustration of the arrangement according to the invention.
Ein Steigrohr 1 eines nicht dargestellten Vorratsbehälters an Metallschmelze, hier Aluminium, ist an einem Einlass 2 einer Einfüllöffnung einer Giesskammer 4, im Beispiel einer Kaltkammer-Druckgussmaschine angeordnet. In der Ruhestellung ist der Pegel 3 der Schmelze auf einem Null-Niveau. Alle Teile, die unterhalb dieses Niveaus ständig mit Aluminium in Berührung kommen, sollen bevorzugt Berührungsflächen mit dem Aluminium aus einer Keramik aufweisen. Die Oberflächen, die im Kontakt mit dem flüssigen Metall stehen, sollten abstossend wirken, um diese Flächen sauber zu halten. Oberhalb des Pegels 3 ist eine Keramikauskleidung ebenfalls vorteilhaft.A riser pipe 1 of a metal melt reservoir, not shown here, aluminum, is arranged at an inlet 2 of a filling opening of a casting chamber 4, in the example of a cold chamber die casting machine. In the rest position, level 3 of the melt is at a zero level. All parts that constantly come into contact with aluminum below this level should preferably have contact surfaces with the aluminum made of a ceramic. The surfaces in contact with the liquid metal should have a repellent effect in order to keep these surfaces clean. A ceramic lining is also advantageous above level 3.
Das Steigrohr 1 (Dosierrohr) soll bevorzugt eine solche Neigung über dem Pegel 3 aufweisen, die ein gutes zurückfiiessen des Metalls ermöglicht und den Zutritt von Luft ausschliesst. Wahrend einer Füllung der Giesskammer 4 darf eine Trennfuge 7 zwischen einem Andockstuck 6 des Steigrohrs 1 und dem Einlass 2 nicht fest verbunden sein. Eine Trenn- bewegung 5 muss nur so gross sein, dass keine Kräfte u a von der Giesskammer 4 bzw der Druckgussmaschine übertragen werden könnenThe riser pipe 1 (metering pipe) should preferably have such an inclination above the level 3 that the metal can flow back well and exclude the entry of air. While the casting chamber 4 is being filled, a parting line 7 between a docking piece 6 of the riser pipe 1 and the inlet 2 must not be firmly connected. A separating movement 5 only has to be so great that no forces can be transmitted, inter alia, from the casting chamber 4 or the die casting machine
Bevorzugt wird das Steigrohr 1 abgesenkt Alternativ kann das gesamte System vertikal bewegbar sein In beiden Fallen ist eine ebene Trennfuge 7 möglich Bei einer ausreichenden Elastizität des Steigrohres 1 kann dessen Verformbarkeit genutzt werden, wobei dann eine nichtebene Trennfuge 7 erforderlich sein kannThe riser pipe 1 is preferably lowered. Alternatively, the entire system can be vertically movable. In both cases, a flat joint 7 is possible. If the riser pipe 1 is sufficiently elastic, its deformability can be used, in which case a non-plane joint 7 may be required
Bei einer vertikalen Andockung ist die vertikale Trennbewegung kleiner 5 mm, um eine horizontale Bewegung zu vermeidenIn the case of vertical docking, the vertical separation movement is less than 5 mm in order to avoid horizontal movement
Die Innenwandung der Giesskammer 4 und des Einlasses 2 können teilweise geschützt ausgeführt sein In der Giesskammer 4 erfolgt dies durch ein keramisches Schutzrohr und im Einlass 2 durch eine keramische Hülse und eine Dichtscheibe im Bereich der Trennfuge 7The inner wall of the casting chamber 4 and the inlet 2 can be partially protected. In the casting chamber 4 this is done by a ceramic protective tube and in the inlet 2 by a ceramic sleeve and a sealing washer in the area of the parting line 7
Dies ermöglicht es zugleich, verschleissbeanspruchte Flachen gezielt auszubilden bzw auszuwechselnAt the same time, this makes it possible to specifically design or replace areas subject to wear
Als Aktuatoren für die Trennbewegung wahrend des Fullvorganges kommen bevorzugt hydraulische oder Pneumatikzylinder zur Anwendung Diese stehen mittels einer nicht dargestellten Anpressvorrichtung mit dem Steigrohr 1 und der Giesskammer 4 in VerbindungHydraulic or pneumatic cylinders are preferably used as actuators for the separating movement during the filling process. These cylinders are connected to the riser pipe 1 and the casting chamber 4 by means of a pressing device (not shown)
Die Erfindung ist nicht auf die dargestellte Ausfuhrungsform begrenzt, insbesondere sind verschiedene Anordnungsvarianten des Aktuators der Anpressvorrichtung aus den vorgenannten Ausfuhrungen fachgemass ableitbar The invention is not limited to the embodiment shown, in particular different arrangement variants of the actuator of the pressing device can be derived professionally from the aforementioned embodiments

Claims

Patentansprüche claims
1 Verfahren zum Befullen einer Giesskammer einer Druckgussmaschine oder dergleichen mit einer dosierten Menge an Metallschmelze, wobei die Menge an Metallschmelze aus einem Vorratsbehalter mittels eines Steigrohres (1 ) in eine Giesskammer (4) einer Druckgussmaschine gelangt und wobei das Steigrohr (1 ) an einen Einlass (2) einer Fulloffnung der Giesskammer (4) andockbar ist, dadurch gekennzeichnet, dass das Steigrohr (1 ) wahrend eines Fullvorganges der Giesskammer (4) nahezu beruhrungslos mit dem Einlass (2) verbunden ist und abdichtend gegen die G'esskammer (4) gedruckt wird1 method for filling a casting chamber of a die casting machine or the like with a metered amount of molten metal, the amount of molten metal coming from a storage container by means of a riser pipe (1) into a casting chamber (4) of a die casting machine and wherein the riser pipe (1) reaches an inlet (2) a full opening of the casting chamber (4) can be docked, characterized in that the riser pipe (1) is connected to the inlet (2) almost without contact during a filling process of the casting chamber (4) and seals against the casting chamber (4) is printed
2 Verfahren nach Anspruch 1 , dadurch gekennzeichnet, dass eine vertikale Relativbewegung zwischen Giesskammer (4) und Steigrohr (1 ) erfolgt2 The method according to claim 1, characterized in that a vertical relative movement between the casting chamber (4) and riser pipe (1) takes place
3 Verfahren nach Anspruch 2, dadurch gekennzeichnet, dass die Relativbewegung (Trennbe.vegung (5)) kleiner gleich 5 mm ist3 The method according to claim 2, characterized in that the relative movement (separation movement (5)) is less than or equal to 5 mm
4 Vorr chtung zum Befullen einer Giesskammer einer Druckgussmaschine oder dergleichen mit einer dosierten Menge an Metallschmelze, wobei ein Vorratsbehalter an Metallscnmelze über ein Steigrohr (1 ) mit αer Giesskammer (4) verbindbar ist und wobei das Steigrohr (1) an einen Einlass (2) einer Einfulloffnung der Giesskammer (4) angedockt ist dadurch gekennzeichnet, dass ein Andockstuck (6) des Steigrohres (1 ) wahrend des Füllens der Giesskammer (4) mit dem Einlass (2) eine kraftfreie Trennfuge (7) bildet 4 device for filling a casting chamber of a die casting machine or the like with a metered amount of molten metal, a storage container of molten metal being connectable to the casting chamber (4) via a riser pipe (1) and the riser pipe (1) being connected to an inlet (2) A pouring opening of the casting chamber (4) is characterized in that a docking piece (6) of the riser pipe (1) forms a force-free parting line (7) during the filling of the casting chamber (4) with the inlet (2)
PCT/CH2001/000043 2000-02-15 2001-01-19 Method and device for filling an injection chamber WO2001060550A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2001224972A AU2001224972A1 (en) 2000-02-15 2001-01-19 Method and device for filling an injection chamber

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10006814.6 2000-02-15
DE2000106814 DE10006814B4 (en) 2000-02-15 2000-02-15 Method and device for filling a casting chamber

Publications (1)

Publication Number Publication Date
WO2001060550A1 true WO2001060550A1 (en) 2001-08-23

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PCT/CH2001/000043 WO2001060550A1 (en) 2000-02-15 2001-01-19 Method and device for filling an injection chamber

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DE (1) DE10006814B4 (en)
WO (1) WO2001060550A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3322186A (en) * 1964-05-11 1967-05-30 Amsted Ind Inc Pressure pouring apparatus
DE3050183A1 (en) * 1980-03-28 1983-01-27 Norsk Hydro Magnesiumgesellschaft mbH, 4300 Essen Doser for molten metal - with non-return valve on heated exit pipe, esp. for delivering molten metal to cold chamber pressure die casting machines
DE4123464A1 (en) * 1991-07-16 1993-01-21 Audi Ag METHOD FOR OPERATING A DIE CASTING MACHINE
DE19802342C1 (en) * 1998-01-22 1999-03-04 Gustav Ohnsmann Apparatus for supplying horizontal and vertical cold chamber diecasting machines with metal

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1252373B (en) * 1964-05-11 1967-10-19 Amsted Industries Incorporated, Chicago 111 (V St A) Niederdruckgießemnchtung and method for operating such
DE1965212A1 (en) * 1969-12-29 1971-07-01 Walter Buescher Riser pipe for low-pressure casting plant
DE2140267A1 (en) * 1971-08-11 1973-02-22 Rheinstahl Huettenwerke Ag Low pressure die casting casting pipe - with detachable upper end piece
FR2642686B1 (en) * 1989-01-16 1991-05-17 Creusot Loire DEVICE AND METHOD FOR SUPPLYING LIQUID METAL FOR PRESSURE CASTING OF METAL PRODUCTS
DE19906982A1 (en) * 1999-02-19 2000-08-24 Cfi Ceramics For Industry Gmbh Riser pipe used in low pressure and counter-pressure metal die casting has a holder coupling region formed by outer surface depressions or roughening

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3322186A (en) * 1964-05-11 1967-05-30 Amsted Ind Inc Pressure pouring apparatus
DE3050183A1 (en) * 1980-03-28 1983-01-27 Norsk Hydro Magnesiumgesellschaft mbH, 4300 Essen Doser for molten metal - with non-return valve on heated exit pipe, esp. for delivering molten metal to cold chamber pressure die casting machines
DE4123464A1 (en) * 1991-07-16 1993-01-21 Audi Ag METHOD FOR OPERATING A DIE CASTING MACHINE
DE19802342C1 (en) * 1998-01-22 1999-03-04 Gustav Ohnsmann Apparatus for supplying horizontal and vertical cold chamber diecasting machines with metal

Also Published As

Publication number Publication date
DE10006814B4 (en) 2007-09-06
AU2001224972A1 (en) 2001-08-27
DE10006814A1 (en) 2001-08-16

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