EP0379418B1 - Verfahren zum Druckgiessen von metallischen Platten oder Brammen und Einrichtung zur Durchführung dieses Verfahrens - Google Patents

Verfahren zum Druckgiessen von metallischen Platten oder Brammen und Einrichtung zur Durchführung dieses Verfahrens Download PDF

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Publication number
EP0379418B1
EP0379418B1 EP90400113A EP90400113A EP0379418B1 EP 0379418 B1 EP0379418 B1 EP 0379418B1 EP 90400113 A EP90400113 A EP 90400113A EP 90400113 A EP90400113 A EP 90400113A EP 0379418 B1 EP0379418 B1 EP 0379418B1
Authority
EP
European Patent Office
Prior art keywords
moulds
molten metal
mould
clamping force
casting
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
EP90400113A
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English (en)
French (fr)
Other versions
EP0379418A1 (de
Inventor
Robert André Vatant
Michel Francois Courbier
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.)
Creusot Loire Industrie SA
Clecim SAS
Original Assignee
Creusot Loire Industrie SA
Clecim SAS
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 Creusot Loire Industrie SA, Clecim SAS filed Critical Creusot Loire Industrie SA
Priority to AT90400113T priority Critical patent/ATE90013T1/de
Publication of EP0379418A1 publication Critical patent/EP0379418A1/de
Application granted granted Critical
Publication of EP0379418B1 publication Critical patent/EP0379418B1/de
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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
    • B22D17/08—Cold chamber machines, i.e. with unheated press chamber into which molten metal is ladled
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D7/00—Casting ingots, e.g. from ferrous metals
    • B22D7/06—Ingot moulds or their manufacture
    • B22D7/08—Divided ingot moulds

Definitions

  • the flyweight plays an important role in pressure casting, in that it largely contributes to the result, that is to say to the quality of the slab.
  • This flyweight essentially has the function of constituting a tank of liquid steel which replenishes the slab during its withdrawal and cooling between the graphite blocks and the spacers.
  • the counterweight forms a mass of steel sufficient to contain, after the end of the casting and the solidification of the bath, the almost inevitable shrinkage in the molds, so that it does not affect the final product.
  • Fig.1 the assembly consisting of the mold 5 and its supporting frame 6 is shown horizontal.
  • the jack 8 makes it possible to tilt the chassis 6 and the mold 5 on the columns 7 around a horizontal axis 40 transverse to the plane of the figure, and constituting the articulation of this assembly on the columns 7. This tilting makes it possible to slightly tilt the mold 5 to bring it into its position allowing the pouring of the liquid metal 2, so known per se.
  • the mold 5 comprises two parallel side walls 25 each consisting of a support 30 and a graphite block 31 partially housed in the support 30 forming a graphite support frame.
  • the support frame 30 has, in the example shown, a C or U-shaped section, the upper and lower branches of which partially enclose between them the corresponding block 31.
  • the upper spacer 20 comprises, opposite the upper end of the front spacer 22, an end portion 20b bent at a right angle upward.
  • This bent part 20b extends vertically upwards over a certain height, as does the upper end of the spacer 22, with which it delimits an ascending channel 15 in which the cast metal can penetrate at the end of filling of the mold 5
  • This channel 15 puts the internal volume of the mold 5 into communication with a shell shown in FIGS. 3 and 4, formed by two complementary half-shells 41 and 42, open upwards and downwards, and delimiting them at their base an opening for introducing the liquid metal.
  • Each half-shell 41, 42 rests on the end of a graphite block 31.
  • This shell 41, 42 can be partially filled at the end of casting by a counterweight 60 of liquid metal, in which after solidification of the slab, a shrinkage can occur.
  • Each cylinder body 52 is here articulated on a flange 54 fixed to the upper part of the support 30, the cylinder being arranged in a substantially horizontal direction, perpendicular to the vertical longitudinal median plane of the mold 5 and of the shell 41 , 42, and preferably at a height such that it is interposed between the clamping members 43 and 44.
  • the force of the jacks 52 is adjusted to a value close to the relaxation of the springs 46 during the solidification of the liquid metal. This relaxation effort corresponds to the effort of the springs 46 slightly reduced.
  • the force exerted by the jacks 52 is therefore adjusted so as to in fact allow a firm static support for the solidified surface layer of the counterweight 60, while practically eliminating the efforts to withdraw the slab, which guarantees the non-appearance of coves at the slab-flyweight transition.
  • the diagram in FIG. 5 shows, by way of nonlimiting example, the clamping force F in daN of the half-shells 41, 42 as a function of the arrow, in millimeters of the clamping members 46.
  • This value corresponds to the total effort of the organs elastic 43 and 44.
  • the value F1 is the total clamping force of the elastic members 43 and 44, and the value F1-F2, is the force actually applied to the half-shells 41, 42 after actuation of the jacks 52.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Reinforcement Elements For Buildings (AREA)
  • Moulds, Cores, Or Mandrels (AREA)
  • Forging (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
  • Press Drives And Press Lines (AREA)

Claims (4)

  1. Verfahren zum Druckgießen von Metallflachzeugen, wie etwa Brammen, ausgehend von einer Metallgießpfanne (1) in einer Form (5) mit zwei mit Graphitblöcken (31) versehenen Seitenwänden (25) sowie mit Abstandsteilen (20 bis 23), die einen Hohlraum zur Aufnahme von flüssigem Metall (2) und zwei nach oben und nach unten offenen Halbkokillen (41, 42) begrenzen, die über einem Schacht (15) gegeneinander gepreßt sind, der durch ein vorderes Abstandsteil (22) und ein Ende (20b) eines oberen Abstandsteils (20) begrenzt wird und einen Zutritt für das flüssige Metall in das Innere des Hohlvolumens der Halbkokillen (41, 42) zur dortigen Ausbildung eines Angusses (60) aus flüssigem Metall bildet, dadurch gekennzeichnet, daß während des Gießens des flüssigen Metalls in die Halbkokillen (41, 42) und des Beginns seiner Erstarrung eine erhöhte Anpreßkraft für die Halbkokillen aufrechterhalten wird, dann nach Erstarrung einer Oberflächenhaut des Angusses (60) die Anpreßkraft vermindert wird, um jeden Widerstand gegen das Zusammenziehen des Flachzeuges zu unterdrücken.
  2. Vorrichtung zur Durchführung des Verfahrens nach Anspruch 1 mit zwei Halbkokillen einer Druckgießform, wobei das Volumen innerhalb der Halbkokillen (41, 42) zur Aufnahme von flüssigem Metall (2) vorgesehen ist, das einen Endanguß (60) des gegossenen Metallflachzeugs bildet, und wenigstens ein elastisches Preßelement (43, 44) für die Halbkokillen auf jeder Seite derselben, dadurch gekennzeichnet, daß sie auf jeder Seite der Halbkokillen (41, 42) Mittel zur Verminderung der Anpreßkraft der elastischen Elemente nach dem Gießen und zu Beginn der Erstarrung des flüssigen Metalls (8) aufweist.
  3. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß die vorgenannten Mittel für jede Halbkokille (41, 42) einen Hydraulikzylinder (52) aufweisen, der an dieser angelenkt ist und von einem feststehenden Teil (30) der Form (5) getragen wird, derart, daß auf die zugeordnete Halbkokille eine Zugkraft ausgeübt werden kann, die der Anpreßkraft der elastischen Elemente (43, 44) entgegengerichtet ist.
  4. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß die Hydraulikzylinder (52) und die elastischen Anpreßelemente (43, 44) von Unterbauten (30) abgestützt werden, die die Graphitblöcke (31) tragen und mit diesen die Seitenwände (25) der Form (5) bilden.
EP90400113A 1989-01-16 1990-01-16 Verfahren zum Druckgiessen von metallischen Platten oder Brammen und Einrichtung zur Durchführung dieses Verfahrens Expired - Lifetime EP0379418B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90400113T ATE90013T1 (de) 1989-01-16 1990-01-16 Verfahren zum druckgiessen von metallischen platten oder brammen und einrichtung zur durchfuehrung dieses verfahrens.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8900457 1989-01-16
FR8900457A FR2642685B1 (fr) 1989-01-16 1989-01-16 Procede de coulee sous pression de produits plats metalliques tels que des brames et dispositif de mise en oeuvre de ce procede

Publications (2)

Publication Number Publication Date
EP0379418A1 EP0379418A1 (de) 1990-07-25
EP0379418B1 true EP0379418B1 (de) 1993-06-02

Family

ID=9377756

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90400113A Expired - Lifetime EP0379418B1 (de) 1989-01-16 1990-01-16 Verfahren zum Druckgiessen von metallischen Platten oder Brammen und Einrichtung zur Durchführung dieses Verfahrens

Country Status (9)

Country Link
US (1) US5197530A (de)
EP (1) EP0379418B1 (de)
JP (1) JPH04504539A (de)
KR (1) KR910700110A (de)
AT (1) ATE90013T1 (de)
AU (1) AU4961690A (de)
DE (1) DE69001761T2 (de)
FR (1) FR2642685B1 (de)
WO (1) WO1990007996A1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016105795A1 (de) * 2016-03-30 2017-10-05 Access E.V. Kokille zum Gießen eines konturierten Metallgegenstandes, insbesondere aus TiAl
CN113737009A (zh) * 2021-08-20 2021-12-03 鞍钢铸钢有限公司 一种扁平电极坯料的制备方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3163887A (en) * 1962-07-16 1965-01-05 Western Electric Co Compression molder
NL134929C (de) * 1966-04-13 1900-01-01
US3590904A (en) * 1967-03-29 1971-07-06 Amsted Ind Inc Method and appratus for cooling graphite molds
GB1316120A (en) * 1969-10-10 1973-05-09 Fisher Gauge Ltd Pressure casting
DE2140268A1 (de) * 1971-08-11 1973-02-22 Rheinstahl Huettenwerke Ag Giessform fuer das niederdruckgiessen grosser, glattwandiger gusstuecke
SU793715A1 (ru) * 1979-02-05 1981-01-07 Горьковский Политехнический Институтим. A.A.Жданова Установка лить под низким давлением
GB8604386D0 (en) * 1986-02-21 1986-03-26 Cosworth Res & Dev Ltd Casting

Also Published As

Publication number Publication date
US5197530A (en) 1993-03-30
EP0379418A1 (de) 1990-07-25
ATE90013T1 (de) 1993-06-15
AU4961690A (en) 1990-08-13
JPH04504539A (ja) 1992-08-13
FR2642685A1 (fr) 1990-08-10
DE69001761D1 (de) 1993-07-08
KR910700110A (ko) 1991-03-13
DE69001761T2 (de) 1994-01-20
FR2642685B1 (fr) 1991-05-17
WO1990007996A1 (fr) 1990-07-26

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