EP0379411A1 - Tiefgesetzte Struktur einer Form zum Druckgiessen von Plattenprodukten oder Brammen und Verfahren zur Montage und Demontage vom tiefergesetzten Querriegel dieser Form - Google Patents

Tiefgesetzte Struktur einer Form zum Druckgiessen von Plattenprodukten oder Brammen und Verfahren zur Montage und Demontage vom tiefergesetzten Querriegel dieser Form Download PDF

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Publication number
EP0379411A1
EP0379411A1 EP90400102A EP90400102A EP0379411A1 EP 0379411 A1 EP0379411 A1 EP 0379411A1 EP 90400102 A EP90400102 A EP 90400102A EP 90400102 A EP90400102 A EP 90400102A EP 0379411 A1 EP0379411 A1 EP 0379411A1
Authority
EP
European Patent Office
Prior art keywords
spacer
chassis
intermediate beam
frame
front part
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.)
Granted
Application number
EP90400102A
Other languages
English (en)
French (fr)
Other versions
EP0379411B1 (de
Inventor
Robert André Vatant
Michel François Courbier
Luc Henri Bertin
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 SA
Creusot Loire Industrie SA
Clecim SAS
Original Assignee
Creusot Loire SA
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 SA, Creusot Loire Industrie SA, Clecim SAS filed Critical Creusot Loire SA
Priority to AT90400102T priority Critical patent/ATE87850T1/de
Publication of EP0379411A1 publication Critical patent/EP0379411A1/de
Application granted granted Critical
Publication of EP0379411B1 publication Critical patent/EP0379411B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
    • 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 invention relates to a lower structure of a die casting mold for flat products of great thickness such as slabs and a method of mounting and dismounting the lower spacer of this mold.
  • a casting process has been known and used for a long time which consists in introducing a pocket containing the metal to be poured inside a tank which is then closed by a cover applied in leaktight manner to the upper edge of the tank.
  • the cover of the tank carries a tube of refractory material, the lower part of which dips into the metal filling the pocket and the upper part of which communicates with a through opening of the cover of the tank provided with means for connection to a pouring nozzle of the metal in a mold.
  • the assembly constituted by the tank containing the pocket and provided with its closing cover can be brought into the casting position below a mold comprising a filling nozzle at its lower part.
  • the mold filling nozzle is placed in coincidence and in leaktight contact with the bag cover connection device, then pressurized air is sent inside the tank so as to cause the metal to rise. inside the refractory tube, then inside the mold, until it is completely filled.
  • This pressure casting process can be applied to the production of thick flat steel products such as slabs.
  • the molds used for the die casting of slabs have a support and tilting frame mounted to pivot about a horizontal axis so that it can be tilted very slightly relative to the horizontal plane in order to connect the mold filling nozzle to the outlet opening of the tank cover before starting the casting operation.
  • the mold mainly comprises two large side walls arranged parallel to one another, the internal faces of which lined with graphite blocks constitute the surfaces of the mold coming into contact with the liquid metal to delimit the two. large faces of the slab.
  • the side walls are mounted on the chassis so as to be movable in the direction perpendicular to their molding faces, that is to say in the transverse direction of the mold corresponding to the thickness of the molded product.
  • the closing of the other faces of the mold cavity, of substantially parallelepiped shape is ensured by spacers interposed between the two side walls which are pressed against these spacers during the casting and the cooling of the metal introduced into the mold.
  • the width of the spacers in the transverse direction determines the thickness of the flat product which is poured.
  • a first spacer or lower spacer is fixed on the upper part of the support and tilting chassis practically over the entire length of this chassis corresponding to the maximum length of the slab which can be poured into the mold.
  • the lower spacer is fixed directly to the frame of the mold by a series of fixing parts called toads which are screwed to the frame in lateral positions relative to the lower spacer and on each side of this spacer. and which each have an internal rim bearing on a corresponding lateral rim of the lower spacer.
  • This mounting of the spacer on the chassis allows certain longitudinal displacements of the spacer, under the effect of thermal expansion, so that distortions or deformations of the lower spacer are avoided, when the liquid metal comes into contact. with this spacer.
  • the object of the invention is therefore to propose a lower structure of a mold for casting under pressure of very thick flat products such as slabs, comprising a support and longitudinal tilting frame carrying a lower spacer disposed along the length of the frame, having a transverse dimension corresponding to the thickness of the slab and intended to constitute the wall closing the mold cavity along its entire length and to provide a space for the passage of the metal and the filling of the mold at its front part, the mold comprising three other spacers and two side walls which can be pressed against the spacers for closing the mold cavity and the lower structure allowing rapid and simple disassembly and replacement of the lower spacer, this lower structure being able to be cooled more effectively during the casting of the metal.
  • the lower mold structure comprises: an intermediate beam freely resting on the chassis, over a length corresponding substantially to the length of the lower spacer, the upper surface opposite to its surface bearing on the chassis carries the lower spacer which is fixed to the intermediate beam with a certain possibility of longitudinal displacement, under the effect of thermal expansion, additional means on the front part of the intermediate beam and on the front part of the chassis for positioning and retaining the intermediate beam on the chassis, -
  • a plurality of means for holding the intermediate beam on the chassis distributed along the length frame frame each comprising a part which can be engaged longitudinally in a fastening device secured to the intermediate beam and which can be actuated to hold the beam on the frame or, on the contrary, to release it, -
  • the invention also relates to a method for dismantling and reassembling a lower spacer of a slab pressure casting mold.
  • an assembly of a slab pressure casting mold is generally designated by the reference 1.
  • This mold has a lower structure 2 constituted by a chassis 3 and a lower spacer 4 fixed on the upper part of the chassis 3.
  • the chassis 3 constitutes a support and tilting element for the walls delimiting the molding cavity 5 of the slab.
  • the frame 3 is mounted tilting about a horizontal axis 6 located in the vicinity of the middle part of the mold in the longitudinal direction corresponding to the longitudinal direction of the slab.
  • the mold 1 comprises a pouring and filling nozzle 9 placed at one of the ends of the lower spacer 4 and of the frame 3 constituting the front end of the mold.
  • a jack 8 makes it possible to tilt the mold 1 between a horizontal position or the nozzle 9 is located slightly above a connection device 10 fixed to the top of the cover 11 of the tank of the pressure casting installation and a position where the mold is tilted forward a few degrees, the end of the pouring and filling nozzle 9 then coming into tight contact with the connection means 10 fixed on the cover 11 of the tank of the installation die casting.
  • the wise filling nozzle 9 is in communication with a tube fixed to the cover 11 of the tank and immersed in a steel pocket.
  • the steel is made to rise in the tube. so that it gradually fills the mold cavity through the filling nozzle 9.
  • the casting mold 1 has an upper spacer 12 fixed to a suspension assembly 13 and maintained in a position substantially parallel to the spacer lower 4.
  • the upper spacer 12 has a substantially vertical front end portion 12b in the service position of the spacer 12.
  • An anterior graphite spacer 14 is disposed vertically in front of the mold so that its lower part defines, with the front part of the lower spacer 4, a passage of a certain width for the liquid metal communicating with the nozzle of casting and filling 9 of the mold.
  • the upper part of the front spacer 14 delimits an ascending channel 15 with the vertical front part of the upper spacer 12.
  • the ascending channel 15 communicates the mold cavity 15 with a counterweight in which the metal settling occurs at the end of casting.
  • the mold 1 also includes a rear spacer 16 which can be moved in the longitudinal direction by means of a device 17 fixed on the rear part of the support and tilting frame 3.
  • Two side walls are mounted movable in the transverse direction, that is to say in a direction perpendicular to the plane of Figure 1, on the frame 3, so as to come into tight contact against the side faces of the spacers 4, 12 , 14, 16, to ensure the closing of the molding cavity 5.
  • the side walls are formed by blocks of graphite juxtaposed and held in supports, so as to constitute the interior wall for molding the cavity 5, along the large faces of the slab parallel to the plane of FIG. 1.
  • the thickness of which in the transverse direction determines the thickness of the casting cavity 5 and the slab.
  • FIGS. 2 and 3 the lower structure 2 of the slab pressure casting mold shown in FIG. 1 is shown in more detail.
  • the support and tilting frame 3 is made up of sheets cut and assembled by welding to produce a structure of great rigidity comprising in particular a spar 20 supporting the mold over its entire length and the support and displacement device 17 of the rear spacer 16 on its rear part.
  • the support and tilting frame 3 also includes elements 21, 21 ′ arranged transversely and of which only the lower part connected to the beam 20 has been shown in FIG. 2.
  • the lower spacer 4 is constituted by a profiled piece of very long steel, the section of the current part of which is visible in FIG. 3.
  • This very long piece has cutouts 22 along straight sections, between the face lower of the spacer and a hole 23 crossing the spacer over its entire thickness in the transverse direction, in the vicinity of its upper part. These cuts make it possible to make successive sections of the lower spacer 4, the longitudinal expansion of which, when the spacer comes into contact with the liquid metal, is partially absorbed at the level of the transverse cuts 22.
  • the front part or nose 4a of the lower spacer 4 has a rounded shape in its part coming into contact with the liquid metal penetrating into the mold by the pouring and filling nozzle 9.
  • the nose 4a of the spacer 4 is cooled by circulation of water in channels 25 of transverse direction, as will be described later.
  • the spacer 4 is fixed to the upper part of the chassis 3, by means of a beam 26 in the form of a box with a rectangular section which will be designated by the rest as an intermediate beam.
  • the intermediate beam comprises an upper plate 27 and a lower plate 28 parallel to one another and arranged over the entire length of the beam 26.
  • These plates 27 and 28 constitute the wings of the beam 26, the core of which is constituted by two continuous parallel plates 29 and 30 connected by welding to the plates 27 and 28 and set back with respect to the outer edge of these plates 27 and 28.
  • Transverse reinforcement elements 32 welded on the plates 27 and 28 and distributed along the length of these plates make it possible to increase the rigidity of the beam 26 and constitute spacers, in particular link at the level of the fixing zones of the spacer 4 on the beam 26.
  • the spacer 4 has a lower part 35 which comprises two end parts 36 projecting outwards on which the edges 37a of toads 37 are applied, fixed by screws 38 on the upper plate 27 of the beam 26.
  • the upper part of the spacer 4 on the side faces of which the side walls of the mold come to apply can have any width in the transverse direction, this width determining the thickness of the slab to be cast being completely independent of the transverse dimensions of the beam 26.
  • the beam 26 can therefore constitute a completely standard element on which we will fix by toads 37, according to the usual technique, a spacer of desired width determining the thickness of the slab.
  • the lower part of the spacer 4 on which the edges 37a of the toads 37 come to apply has a standard dimension ensuring its attachment to the beam 26.
  • a longitudinal partition 34 is fixed to the middle part of the beam 26, equidistant from the webs 28 and 29, so as to delimit two completely separate compartments over the entire length of the beam 26, inside the box formed by the wings 27 and 28 and the cores 29 and 30.
  • the beam 26 has internal transverse spacers 39 comprising on either side of the wall 34 of the lateral cutouts ensuring the communication of the different parts compartments located on either side of the wall 34, along the length of the beam 26.
  • U-shaped profiles 40 are welded to the internal surface of the cores 26 and 29 to form water circulation channels isolated from the remaining part of the compartments delimited by the wall 34 inside the box beam. 26.
  • the box beam is closed at its front end by a transverse plate 42 closing each of the compartments of the box delimited by the wall 34 at its front end.
  • the wall 34 provides a space allowing the passage of water relative to the wall 42 at its anterior end.
  • Cooling water is also sent from the rear end of the intermediate beam 26 into one of the circulation channels delimited by a U-shaped profile 40.
  • This water circulates along the entire length of the beam 26 and is then sent by by means of two external pipes 43 tightly fixed at the end of the circulation channels delimited by the profiles 40 inside of the box beam 26, to the cooling channels 25 of the front part of the spacer 4.
  • Two other external pipes identical to the pipes 43 collect the cooling water on the opposite face of the spacer 4 to return it to the second channel delimited by the second profile 40. It is thus possible, by an intense circulation of cooling water in the longitudinal channels of the beam 26 and in the through channels 25 of the front part or nose of the spacer, to cool the part of this lower spacer 4 coming into contact with the liquid metal.
  • the lower wing 28 of the box beam 26 carries on its internal surface profiled parts 45 in the form of a U comprising a longitudinal T-shaped slot in which the part d end of the rod 46 of a jack 47.
  • the bodies of the jacks 47 are fixed to the lower part of the chassis 3 directly above each of the profiled parts 45 or lardons in which the jack rod is engaged, when the beam 26 is in the service position on the chassis 3 as shown in FIGS. 2 and 3.
  • the rod 46 of the cylinder 47 has an enlarged part 48 which may be constituted by an insert such as a nut or a ring fixed to the end of the rod 46.
  • the diameter of the rod 46 is less than the width of the opening of the part 45 in its narrower part corresponding to the branch of the T.
  • the enlarged part 48 fixed to the end of the rod 46 has a diameter with a width greater than the width of the part 49 of the opening of the part 45.
  • the dimension of the enlarged part 48 is on the other hand less than the width of the upper part 50 of the opening of the part 45.
  • jacks 47 are fixed along the length of the chassis 3 and a part 45 or lardon is fixed on the lower wing 28 of the beam 26 directly above each of the jacks 47.
  • the lardons 45 are welded to the lower surface of the wing 28 and pass through the upper part of the chassis 3 at a passage opening, on either side of which wedges 51 are welded allowing perfect positioning and adjustment of the box beam 26 on the upper surface of the beam 20 of the chassis 3.
  • the closing plate 42 of the front part of the box beam 26 carries two positioning pins 54 which are engaged, when the beam 26 is in the service position on the chassis 3, in housings formed at the front end of the side member 20 of the chassis 3.
  • a jack 56 is hingedly attached to a yoke 57 integral with the lower end of the chassis 3, the rod of the jack being itself hinged at the end of one of the branches of an angled lever 58.
  • the bent lever 58 is mounted articulated around an axis 59 of transverse direction on the chassis 3.
  • the second branch of the bent lever 58 making an angle a little less than 90 ° with the first articulated branch at the end of the rod of the jack 56 is formed in the form of a ball joint 60 interposed between two stops 61 carried by the plate lower 28 of the beam 26, in the front part of this beam.
  • the displacement in longitudinal translation of the beam 26 on the chassis can be obtained by feeding the jack 56 so as to extract its rod integral with the end of the first branch of the lever 58.
  • the lever 58 rotates about its axis 59 and the ball joint 60 pushes the stop 61 into its position 61 ′, which causes the beam 26 and the spacer 4 to move in their respective positions 26 ′ and 4 ′.
  • the lever 58 and ball joint 60 device is connected to the beam 26 in its front part, which makes it possible to avoid the drawbacks linked to the thermal expansion of the front part of the beam 26.
  • the pieces 45 or lardons whose split part 49 has a width greater than the diameter of the rod 46 of the jack move in translation relative to the jack rods which are themselves held in position fixed in the chassis 3.
  • the translation caused by the jack 56 and the bent lever 58 has a sufficient amplitude to completely disengage the rods 46 from the jacks 47 strips 45. This translation is also sufficient to completely disengage the positioning pins 54 fixed at the end of the beam 46, from the housings 55 of the front end of the chassis 3.
  • the beam 26 is free in longitudinal translation and can be moved by feeding the jack 56 so as to completely release the rods from the jacks lardons 45 and pins 54 of housings 55.
  • the assembly constituted by the beam 26 and the spacer 4 is then completely separated from the chassis 3 and can be removed, for example, using an overhead crane.
  • a new one seems to consist of an intermediate beam and a spacer, for example of a different dimension to change the thickness of the molding cavity, is brought into position by the traveling crane above the chassis 3.
  • the desired pressure is then applied in the retaining jacks 47 which, by pulling via their rod 46 and lardons 45, maintain the intermediate beam 46 on the upper part of the chassis 3.
  • the spacer 4 of desired width which is fixed on the upper part of the beam 46 by means of the toads 37 is then in place and can undergo certain longitudinal deformations with respect to the beam 26 during casting, thanks to this method of fixing.
  • All of the positioning and locking operations can be controlled remotely, only the precise transverse positioning of the strips and the longitudinal positioning of the stops 61 of before being checked by an operator working near the installation.
  • the box structure of the beam allows cooling of this beam and a supply of the cooling channels of the nose of the lower spacer.
  • jacks 47 for holding the intermediate beam on the chassis can be constituted both by screw jacks and by hydraulic jacks.
  • the translation device can be of a different type from that described which comprises a hydraulic cylinder and a bent lever.
  • connection between the ends of the rods 46 of the cylinders 47 and the beam 26 can be produced by parts of a shape different from the lardons 45, from the moment when the ends of the rods can be slid by axial translation in a zone of the parts of connection allowing to exert a traction perpendicular to the surface of the frame.
  • the box beam can have a different structure from that which has been described and the cooling means associated with this beam can have different embodiments.
  • the invention applies to the casting of slabs of all sizes in a pressure casting installation.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
  • Moulds, Cores, Or Mandrels (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
EP90400102A 1989-01-16 1990-01-15 Tiefgesetzte Struktur einer Form zum Druckgiessen von Plattenprodukten oder Brammen und Verfahren zur Montage und Demontage vom tiefergesetzten Querriegel dieser Form Expired - Lifetime EP0379411B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90400102T ATE87850T1 (de) 1989-01-16 1990-01-15 Tiefgesetzte struktur einer form zum druckgiessen von plattenprodukten oder brammen und verfahren zur montage und demontage vom tiefergesetzten querriegel dieser form.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8900454 1989-01-16
FR8900454A FR2642681B1 (fr) 1989-01-16 1989-01-16 Structure inferieure d'un moule de coulee sous pression de produits plats tels que des brames et procede de montage et de demontage de l'entretoise inferieure de ce moule

Publications (2)

Publication Number Publication Date
EP0379411A1 true EP0379411A1 (de) 1990-07-25
EP0379411B1 EP0379411B1 (de) 1993-04-07

Family

ID=9377753

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90400102A Expired - Lifetime EP0379411B1 (de) 1989-01-16 1990-01-15 Tiefgesetzte Struktur einer Form zum Druckgiessen von Plattenprodukten oder Brammen und Verfahren zur Montage und Demontage vom tiefergesetzten Querriegel dieser Form

Country Status (10)

Country Link
US (1) US5255732A (de)
EP (1) EP0379411B1 (de)
JP (1) JPH04504536A (de)
KR (1) KR910700113A (de)
AT (1) ATE87850T1 (de)
AU (1) AU4965090A (de)
CS (1) CS22090A3 (de)
DE (1) DE69001259T2 (de)
FR (1) FR2642681B1 (de)
WO (1) WO1990008000A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3114944B2 (ja) * 1991-07-12 2000-12-04 株式会社スター精機 成形機における金型自動交換方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1608056B1 (de) * 1967-03-29 1970-08-27 Amsted Ind Inc Einrichtung und Verfahren zum Kuehlen einer Giessform

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3340926A (en) * 1964-07-14 1967-09-12 Sylvester Entpr Casting apparatus
US3434528A (en) * 1966-06-06 1969-03-25 United Eng Foundry Co Mold structure leveling device
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
US3646991A (en) * 1970-06-22 1972-03-07 Armsted Ind Inc Top block shift
US3888453A (en) * 1974-04-12 1975-06-10 Amsted Ind Inc Top block stop for applying a longitudinal force to the top block of a pressure casting mold
JPS62142060A (ja) * 1985-12-13 1987-06-25 Honda Motor Co Ltd 水冷式成形金型
JPS62144861A (ja) * 1985-12-19 1987-06-29 Honda Motor Co Ltd 水冷式成形金型
FR2642680B1 (fr) * 1989-01-16 1993-06-18 Creusot Loire Moule de coulee sous pression de produits plats metalliques tels que des brames
FR2642683B1 (fr) * 1989-01-16 1991-05-17 Creusot Loire Entretoise arriere d'un moule de coulee sous pression de produits plats metalliques tels que des brames

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1608056B1 (de) * 1967-03-29 1970-08-27 Amsted Ind Inc Einrichtung und Verfahren zum Kuehlen einer Giessform

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN *

Also Published As

Publication number Publication date
US5255732A (en) 1993-10-26
ATE87850T1 (de) 1993-04-15
KR910700113A (ko) 1991-03-13
AU4965090A (en) 1990-08-13
CS22090A3 (en) 1992-02-19
WO1990008000A1 (fr) 1990-07-26
JPH04504536A (ja) 1992-08-13
DE69001259D1 (de) 1993-05-13
DE69001259T2 (de) 1993-11-04
EP0379411B1 (de) 1993-04-07
FR2642681B1 (fr) 1991-05-17
FR2642681A1 (fr) 1990-08-10

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