EP0176605B1 - Procédé de coulée sous pression pour la production de pièces coulées avec une machine à coulée sous pression à chambre froide horizontale et machine pour la mise en oeuvre du procédé - Google Patents

Procédé de coulée sous pression pour la production de pièces coulées avec une machine à coulée sous pression à chambre froide horizontale et machine pour la mise en oeuvre du procédé Download PDF

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Publication number
EP0176605B1
EP0176605B1 EP84108607A EP84108607A EP0176605B1 EP 0176605 B1 EP0176605 B1 EP 0176605B1 EP 84108607 A EP84108607 A EP 84108607A EP 84108607 A EP84108607 A EP 84108607A EP 0176605 B1 EP0176605 B1 EP 0176605B1
Authority
EP
European Patent Office
Prior art keywords
die casting
casting
filling chamber
piston
metal
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
EP84108607A
Other languages
German (de)
English (en)
Other versions
EP0176605A3 (en
EP0176605A2 (fr
Inventor
Jochen Dr.-Ing. Spriestersbach
Herbert Dr.-Ing. Woithe
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.)
Vereinigte Aluminium Werke AG
Original Assignee
Maschinenfabrik Mueller Weingarten AG
Vereinigte Aluminium Werke AG
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 Maschinenfabrik Mueller Weingarten AG, Vereinigte Aluminium Werke AG filed Critical Maschinenfabrik Mueller Weingarten AG
Priority to AT84108607T priority Critical patent/ATE27418T1/de
Publication of EP0176605A2 publication Critical patent/EP0176605A2/fr
Publication of EP0176605A3 publication Critical patent/EP0176605A3/de
Application granted granted Critical
Publication of EP0176605B1 publication Critical patent/EP0176605B1/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
    • B22D17/2015—Means for forcing the molten metal into the die
    • B22D17/2038—Heating, cooling or lubricating the injection unit
    • 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
    • B22D17/08—Cold chamber machines, i.e. with unheated press chamber into which molten metal is ladled
    • B22D17/10—Cold chamber machines, i.e. with unheated press chamber into which molten metal is ladled with horizontal press motion
    • 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
    • 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 die casting method for the production of castings with a horizontal, a filling chamber and a casting piston having cold chamber die casting machine, in which the metering of the metal is carried out by means of vacuum via a riser pipe and a suction opening into the filling chamber and in which the ancestor cooled pouring plunger through the suction opening metal flakes occur when the metal stream supplied to the filling chamber is sheared off; it also relates to a horizontal cold chamber die casting machine for carrying out this method, which has a casting piston and a filling chamber, into which metal can be introduced from a casting furnace by means of vacuum via a riser pipe.
  • the invention has for its object to improve a die casting process of the type mentioned in such a way that the disadvantages mentioned are eliminated and wear damage that occurs is largely avoided, and to find a particularly advantageous device for carrying out such a die casting process.
  • this object is achieved in a method of the type mentioned at the outset in that the casting piston runs over the metal flakes as it runs backwards and which it only ejects forward from the filling chamber with at least one additional piston stroke.
  • the casting piston is charged with lubricant before the additional piston stroke is carried out: this has the advantage that lubricant can be distributed evenly on the inner surface of the filling chamber during the idle stroke.
  • One to three additional piston strokes are advantageously used to eject the metal flakes.
  • a further advantageous embodiment of the method according to the invention also consists in the fact that the filling chamber is thermally insulated against heating in the region of the mouth of the riser pipe, whereby it can be prevented that the inside width of the filling chamber varies over its length.
  • a significantly favorable influence in the same direction can also be advantageously achieved in a method according to the invention if the filling chamber (instead or additionally) is cooled in the region of the mouth of the riser pipe in such a way that the temperature distribution is essentially constant over the length of the filling chamber.
  • Such an embodiment can be such.
  • B. enable by a conventional heat exchanger.
  • the cold chamber die casting machine according to the invention is based on a die casting machine of the type mentioned at the outset and is characterized in that the casting piston is provided on its piston rear side with a beveled end edge and on its front side with an ejection edge for the metal tinsel.
  • the die casting machine according to the invention thus works with one on its back, d. H. Pistons designed to be tapered towards the piston rod, the bevel being designed so that the metal residues (metal flakes) adhering in the filling chamber space can be run over when the piston runs back. Since the pouring plunger is cooled, it cools down even after the pouring residue has been pushed off as a result of constant cooling, such as water cooling.
  • the filling chamber has an inner tube and an outer tube, a double-start spiral groove being provided in the intermediate region between the two tubes (transition region), through which a temperature control agent can be passed.
  • the inner tube is preferably designed as an exchangeable wear part.
  • Another preferred embodiment also consists in the fact that in a die casting machine according to the invention the ratio between the volume of the melt enclosed within the immersed part of the riser pipe and the internal volume of the above section of the riser pipe (without taking into account the inlet throttle arranged at the inlet of the riser pipe) is at least 1: 4.
  • the metal level in the casting furnace drops during ongoing production and the associated metal extraction.
  • the molten metal is normally metered into the filling chamber by a time-dependent control. This means that readjustments have to be carried out continuously if the same dosing quantities are required.
  • the minimum ratio required according to the invention enables high dosing accuracy. With falling bath level z. B.
  • the necessary dosing time which is due to the fact that the pre-metered amount of metal in the riser pipe was reduced due to the metal level.
  • the effect of an uneven pre-metering depending on the metal level is minimized by the intake manifold geometry which is preferably specified in the invention.
  • a filling chamber 1 is provided, which is held with a machine plate 2 and is provided with a heat exchanger 4 in the region of the attachment of the riser pipe 3 (opening of the same in the filling chamber 1).
  • the riser pipe 3 is flanged to the filling chamber 1 by means of the riser pipe holder 5 and a pressure screw 6.
  • the filling chamber 1 carries on one side a fixed mold half 7 and on its other side a closing piece 8, in which a sealing ring 9 is held over a closing ring 10.
  • the casting piston 11 Inside the filling chamber 1 is the casting piston 11, which is shown in its starting position. It has a sharp ejection edge 12 at its front end and a sliding edge 13 which is tapered towards the piston rod at its rear end. In this respect, reference is expressly made to the drawing in FIG. 1.
  • the riser pipe 3 dips into the molten metal 14 of a casting furnace 15 and has two sections of different internal width, as is clearly shown in the figure.
  • the lower part of the inner volume of the suction pipe 17 dips into the metal bath 14. Above this there is a larger internal volume 18 of the riser pipe 3. If the metal bath level moves approximately from 16a to 16b (cf. FIG. 1), there is a reduction in the amount of metal pre-metered in area 17. However, this change is negligibly small, since that Volume in area 17 is very small compared to the volume in area 18.
  • a throttle 19 is provided for the entry of the molten metal into the riser pipe 3. The volume of this throttle 19, however, has virtually no influence on the fluctuation in the metered quantity.
  • a filling chamber 20 is shown, which is divided longitudinally and consists of an outer jacket part 21, into which grooves 22 are incorporated in the form of a spiral groove, and an inner tube 23: the inner tube 23, which can be regarded as a wearing part consist of the same material as the outer tube 21.
  • Both tubes have a bore 24 arranged radially to the longitudinal axis of the tube for the supply of lubricant.
  • the lubricant hole 24 is arranged opposite.
  • the helical groove 22 is designed in such a way that the temperature control medium can flow back and forth via an outlet 26 and an inlet 27.
  • the spiral groove 22 is a double-start spiral groove with a flow, as shown by the arrows in the lower region of the illustration according to FIG. 2 within the grooves.
  • the temperature control medium supplied to the double-start spiral groove has an inlet temperature of 200 to 300 ° C and enables a uniform temperature distribution along the filling chamber 20.
  • the filling chamber 20 is thus well cooled by a double-start spiral groove 22, as a result of which a very even temperature distribution in the filling chamber 20 can be achieved .
  • this prevents the filling chamber 20 from expanding too much, for example in the area of the suction pipe 3, the temperature medium being guided between the inner and outer pipes in the double-start spiral groove 22, which ends in a common annular groove.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Secondary Cells (AREA)
  • Battery Electrode And Active Subsutance (AREA)

Claims (9)

1. Procédé de coulée sous pression pour produire des pièces coulées avec une machine de coulée sous pression à chambre froide horizontale comportant une chambre de remplissage et un piston de coulée, dans lequel le dosage du métal a lieu au moyen du vide par l'intermédiaire d'un tuyau élévateur (3) et d'une ouverture d'aspiration à l'intérieur de la chambre de remplissage (1), et dans lequel, lorsque le piston de coulée (11) refroidi avance au-delà de l'ouverture d'aspiration, des paillettes métalliques apparaissent lors du cisaillement du courant métallique parvenant dans la chambre de remplissage (1), paillettes qui sont ensuite de nouveau retirées de la chambre de remplissage (1) par le piston de coulée (11), caractérisé en ce que le piston de coulée (11) franchit les paillettes métalliques lors de sa course de retour et celles-ci ne sont expulsées de la chambre de remplissage (1) vers l'avant que lors d'au moins une autre course supplémentaire du piston.
2. Procédé selon la revendication 1, caractérisé en ce que l'on applique du lubrifiant au piston de coulée (11) avant l'exécution de sa course supplémentaire.
3. Procédé selon la revendication 1 ou 2, caractérisé en ce que la chambre de remplissage (1) est isolée thermiquement contre le chauffage dans la zone de l'embouchure d'entrée du tuyau élévateur (3).
4. Procédé selon l'une des revendications 1 à 3, caractérisé en ce que l'on refroidit la chambre de remplissage (1) dans la zone de l'embouchure d'entrée du tuyau élévateur (3) de telle façon que la distribution de température est sensiblement constante sur la longueur de la chambre de remplissage (1).
5. Procédé selon l'une des revendications 1 à 4, caractérisé en ce que, pour expulser les paillettes métalliques, on utilise une à trois courses de piston supplémentaires.
6. Machine de coulée sous pression à chambre froide horizontale pour mettre en oeuvre le procédé selon l'une des revendications 1 à 5, comportant un piston de coulée (11) refroidi et une chambre de remplissage (1) dans laquelle du métal provenant d'un four de coulée (5) peut être introduit au moyen du vide par l'intermédiaire d'un tuyau élévateur (3), caractérisée en ce que le piston de coulée (11) comporte, sur sa face postérieure, une arête terminale biseautée (13), ainsi que, sur sa face antérieure, une arête d'éjection (12) pour les paillettes métalliques.
7. Machine selon la revendication 6, caractérisée en ce que la chambre de remplissage (1) comporte un tube intérieur (23) et un tube extérieur (21), une rainure hélicoïdale à deux filets (22) étant prévue dans la zone de transition des deux tubes pour le passage d'agent d'égalisation de la température.
8. Machine selon la revendication 6 ou 7, caractérisée en ce que le rapport entre le volume de la masse métallique fondue se trouvant à l'intérieur de la partie immergée du tuyau élévateur (3) et le volume intérieur de la section du tuyau élévateur (3) qui se trouve au-dessus (sans tenir compte du point d'étranglement situé du côté de l'entrée du tuyau élévateur) est d'au moins 1 : 4.
9. Machine selon l'une des revendications 6 à 8, caractérisée en ce que le tube intérieur (23) est réalisé sous la forme d'une pièce amovible.
EP84108607A 1984-01-19 1984-07-20 Procédé de coulée sous pression pour la production de pièces coulées avec une machine à coulée sous pression à chambre froide horizontale et machine pour la mise en oeuvre du procédé Expired EP0176605B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84108607T ATE27418T1 (de) 1984-01-19 1984-07-20 Druckgiessverfahren zur herstellung von gussstuecken mit einer horizontalen kaltkammerdruckgiessmaschine sowie kaltkammerdruckgiessmaschine zur durchfuehrung des verfahrens.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3401715A DE3401715C2 (de) 1984-01-19 1984-01-19 Druckgiessverfahren zur Herstellung gasarmer, porenarmer und oxydarmer Gußstücke
DE3401715 1984-01-19

Publications (3)

Publication Number Publication Date
EP0176605A2 EP0176605A2 (fr) 1986-04-09
EP0176605A3 EP0176605A3 (en) 1986-04-30
EP0176605B1 true EP0176605B1 (fr) 1987-05-27

Family

ID=6225337

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84108607A Expired EP0176605B1 (fr) 1984-01-19 1984-07-20 Procédé de coulée sous pression pour la production de pièces coulées avec une machine à coulée sous pression à chambre froide horizontale et machine pour la mise en oeuvre du procédé

Country Status (6)

Country Link
US (1) US4660614A (fr)
EP (1) EP0176605B1 (fr)
JP (1) JP2645488B2 (fr)
AT (1) ATE27418T1 (fr)
DE (2) DE3401715C2 (fr)
NO (1) NO161657C (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3763834D1 (de) * 1987-04-07 1990-08-23 Mueller Weingarten Maschf Saugrohr fuer vakuum-druckgiessmaschine.
US5076344A (en) * 1989-03-07 1991-12-31 Aluminum Company Of America Die-casting process and equipment
DE4101592A1 (de) * 1991-01-21 1992-07-23 Mueller Weingarten Maschf Druckgiessmaschine
US5429174A (en) * 1993-07-15 1995-07-04 Aluminum Company Of America Vacuum die casting machine having improved siphon tube and associated method
DE19921496A1 (de) * 1999-05-08 2000-11-09 Mueller Weingarten Maschf Kolbenseitige Absaugabdichtung bei Anwendung des Vakuumdruckgießverfahren
DE19923341B4 (de) * 1999-05-21 2005-03-03 Audi Ag Verfahren zum Betreiben einer Druckgießmaschine sowie Druckgießmaschine zur Durchführung des Verfahrens
US8714914B2 (en) * 2009-09-08 2014-05-06 Paul V. Cooper Molten metal pump filter
CN103127714B (zh) * 2011-11-30 2015-09-23 京乐产业.株式会社 游戏机
EP2969311A4 (fr) * 2013-03-12 2016-09-14 United Technologies Corp Ensemble tube d'injection isothermique
US9205491B2 (en) * 2014-01-21 2015-12-08 GM Global Technology Operations LLC Metal pouring method for the die casting process
CN104259429B (zh) * 2014-09-16 2017-08-01 苏州橙石铸造有限公司 一种卧式冷室压铸机给料系统
CN104259428B (zh) * 2014-09-16 2017-01-11 苏州橙石铸造有限公司 一种用于压铸机射料装置的加热系统
CN104259423B (zh) * 2014-09-16 2017-01-25 苏州橙石铸造有限公司 一种用于压铸机上的射料装置

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3009218A (en) * 1958-10-22 1961-11-21 David M Morgenstern Apparatus for vacuum feeding a die casting machine
US3516480A (en) * 1968-06-17 1970-06-23 Hamilton Die Cast Inc Shot tube for a die casting type machine
DE1959033B2 (de) * 1969-11-25 1971-05-27 Siemens Ag Druckgiessanlage
DE2246686C3 (de) * 1972-09-22 1978-03-09 Maschinenfabrik Weingarten Ag, 7987 Weingarten Druckgießform für Druckgießmaschinen
DE2539280A1 (de) * 1975-09-04 1977-03-17 Nippon Light Metal Co Vorrichtung fuer die zufuhr von geschmolzenem metall zu einer druckgiessmaschine
JPS5342013A (en) * 1976-09-29 1978-04-17 Hitachi Ltd Tape drive mechanism for tape recorder
DE3041340A1 (de) * 1980-11-03 1982-05-13 Maschinenfabrik Weingarten Ag, 7987 Weingarten Druckgiessverfahren zur herstellung von gasarmer, porenarmer und oxydarmer gussstuecke sowie druckgiessmaschine zur durchfuehrung des verfahrens
DE3102055C2 (de) * 1981-01-23 1984-03-22 Karl Dipl.-Ing. 7000 Stuttgart Göhring Waagerechte Kaltkammer-Druckgießmaschine

Also Published As

Publication number Publication date
DE3463905D1 (en) 1987-07-02
NO161657B (no) 1989-06-05
ATE27418T1 (de) 1987-06-15
NO842769L (no) 1985-07-22
US4660614A (en) 1987-04-28
EP0176605A3 (en) 1986-04-30
NO161657C (no) 1989-09-13
EP0176605A2 (fr) 1986-04-09
DE3401715C2 (de) 1986-02-27
JPS60231563A (ja) 1985-11-18
DE3401715A1 (de) 1985-08-08
JP2645488B2 (ja) 1997-08-25

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