EP0463911B1 - Procédé, moule et installation pour la coulée de métal multi-étages sous basse pression - Google Patents

Procédé, moule et installation pour la coulée de métal multi-étages sous basse pression Download PDF

Info

Publication number
EP0463911B1
EP0463911B1 EP91401544A EP91401544A EP0463911B1 EP 0463911 B1 EP0463911 B1 EP 0463911B1 EP 91401544 A EP91401544 A EP 91401544A EP 91401544 A EP91401544 A EP 91401544A EP 0463911 B1 EP0463911 B1 EP 0463911B1
Authority
EP
European Patent Office
Prior art keywords
casting
stage
metal
channel
mould
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
EP91401544A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0463911A1 (fr
Inventor
Pascal Sourlier
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.)
Pont a Mousson SA
Original Assignee
Pont a Mousson SA
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 Pont a Mousson SA filed Critical Pont a Mousson SA
Publication of EP0463911A1 publication Critical patent/EP0463911A1/fr
Application granted granted Critical
Publication of EP0463911B1 publication Critical patent/EP0463911B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/20—Stack moulds, i.e. arrangement of multiple moulds or flasks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
    • 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 present invention relates to metal casting under low pressure in a multi-stage blind sand mold. It relates firstly to a process for feeding the imprints of a mold in blind sand with several stages, in metal casting under low pressure, the supply taking place via a casting well and, on each stage, at least one intermediate channel starting from this well and the attacks connecting this channel to the or each footprint. A process of this type is described in FR-A-2 295 808.
  • the low pressure casting technique (see for example FR-A-2 295 808, 2 367 566 and 2 556 996 in the name of the Applicant) is particularly advantageous, compared to gravity casting, for producing metal parts with thin wall and / or of complex shape and / or of large dimensions. Indeed, the pressure exerted by the metal, which results from the injection of a gas into a sealed pocket containing the liquid metal, can be controlled at will so as to push the metal into all the recesses of the imprints.
  • the invention aims to remedy these drawbacks.
  • the method according to the invention is characterized by the characterizing part of claim 1.
  • the invention also relates to a blind sand mold intended for the implementation of such a process.
  • This mold is described in claim 4, and other features are described in claims 5 and 6.
  • the invention also relates to a low pressure metal casting installation in a blind sand mold on several floors, of the type comprising a casting ladle from which a feed tube opens upwards, a gas source under pressure connected to the ladle, at least one blind sand mold comprising a casting well open downwards and at least two stages on each of which is provided at least one footprint fed via attacks connected to the casting well by at least one intermediate channel, and means for applying the base of the tapping well to the opening of the supply tube, characterized in that the mold conforms to the definition above.
  • the installation shown in Fig. 1 includes an enclosure 1 forming a pocket or reserve of liquid metal 2, a frame 3 for mold support and a sand mold 4. It is applied to low pressure casting of cast iron (gray cast iron or spheroidal graphite cast iron), steel or a superalloy in the mold 4. Apart from the internal configuration of this mold, the installation is identical to that described in the aforementioned FR-A-2 295 808.
  • the pocket 1, fixed has an upper cover 5 tightly fixed to its side walls and locked by suitable means (not shown).
  • a pouring nozzle 6 passes through an orifice 7 formed in the cover 5.
  • This nozzle 6 comprises a tubular lower part 8 whose outside diameter corresponds to the diameter of the orifice 7 and an upper part 9, of generally frustoconical shape, which s' presses tightly on the periphery of the orifice 7 by its large flat base 10.
  • a seal 11 formed by an asbestos bead is housed in a groove formed in the base 10 of the nozzle.
  • the nozzle 6 is traversed by a conduit or supply tube 12 made of refractory material dipping into the cast iron up to the vicinity of the bottom of the pocket 1; the upper part of the duct 12 opens out at the center of the nozzle 6, at the level of the planar upper face of the latter.
  • the bag 1 is connected to a source 13 of pressurized gas by a conduit 14, the communication of the bag 1 with the pressure source 13 or with the atmosphere effected by a suitable device 15 outside the bag.
  • a pressure gauge 16 makes it possible to monitor the pressure prevailing inside the pocket during pouring.
  • the frame 3 comprises posts 17 provided at their base with wheels 18 carried by two rails 19.
  • the posts 17 are joined at their upper end by a ceiling 20 carrying a jack 21 directed downwards and whose piston rod 22 carries, articulated at its lower end, a support plate 23.
  • the posts 17 also each carry a flange 24 on which a helical spring 25 rests.
  • a horizontal support plate 26 can slide vertically along a part of the: posts 17 located above the flanges 24; this plate 26 is in constant abutment on the upper end of the springs 25 and is urged by them upwards. When no downward pressure is applied to the plate 26, it is at a level higher than that of the upper face of the nozzle 6.
  • a circular opening 27, of sufficient diameter to allow the nozzle 6 to pass is provided in the plate 26.
  • the mold 4 is a solid multi-stage blind mold, for example with three stages, as shown in FIG. 2. It comprises a vertical pouring well 28, of circular section approximately equal to that of the supply tube 12. This well is open at its base, which has a housing 29 having a tapered flared shape combined with that of the nozzle 6. It extends to a certain distance from the upper end face of the mold.
  • each stage is identical, and the structure of each stage appears in FIG. 3. From the pouring well 28, two channels 30A and 30B leave horizontally, which extend in the extension of one another, on either side of the well 28.
  • the stage also comprises two indentations 31 of elongated shape , identical.
  • Each footprint, which extends on either side of the well 28, is fed by three attacks. In the example shown, there is for each fingerprint an attack 32A on one side of the well and two attacks 32B on the other side.
  • the three attacks 32A connect the fingerprints to channel 30A, and the three attacks 32B connect them to channel 30B.
  • each channel 30A or 30B connects the casting well to all: the attacks located on the same side of the well 28 and therefore participates in the supply of the two footprints of the floor.
  • Channels 30A and 30B have a relatively small section. More precisely, the sum of the areas of the sections of the intermediate channels 30A, 30B of a stage is much less than the area of the section of the taphole 28, for example less than 10% of this area. If the channels are of variable section, it is their input section which fulfills this condition.
  • the sum of the areas of the attack sections fed by the same channel is at least equal to the area of the section, or of the entry section, of this channel.
  • the operation of the installation is as follows: the frame 3 being distant from the pocket 1, an appropriate refractory seal 33 is applied to the bottom of the housing 29 of the mold 4.
  • the mold 4, containing in each cavity a non-core shown, is placed on the plate 26 and centered on the opening 27 thereof, then the frame 3 is brought to the rails 19 above the pocket 1 of liquid iron so that the nozzle 6 is located opposite the housing 29 of the mold.
  • the jack 21 is then extended so as to lower, by means of the plate: 23, the mold 4 and its support 26 against the force of the springs 25. This operation clamps the seal 33 between the bottom of the housing 29 and the nozzle 6 and ensures the tight connection of the pouring well to the supply tube.
  • the bag 1 is then connected to the pressure source 13 by operating the device 15.
  • the pressure acting on the free surface of the cast iron makes it rise in the tube 12.
  • the cast iron fills the well 28 of the mold, the channels 30A and 30B and the imprints 31.
  • the pressure is maintained for a time determined according to the dimensions and the shapes of the parts to be obtained.
  • the well 28 plays during this time the role of reserve or counterweight by bringing to the imprints the additional liquid cast iron intended to compensate for the withdrawals.
  • the attacks and the intermediate channels solidify, the gas pressure is brought back to atmospheric pressure in the pocket 1, by maneuvering of the device 15, and the liquid iron being in the well 28 and in the tube 12 goes back down in the pocket 1 by evacuating these two conduits.
  • the liquid metal rises rapidly in well 28, the metallostatic pressure is established in the channels on each stage, and the two cavities of each stage are supplied by the pair of channels 30A and 30B corresponding.
  • the narrowness of the intermediate channels limits the metal flow which flows there, which leads on the one hand to a better controlled filling, quieter and reproducible for each of the imprints of the different stages, and on the other hand minimal metal displacement with each pour. This is further favored by the relaxation of the liquid metal at its entry into the attacks, resulting from the aforementioned dimensioning of these. This ultimately results in an improvement in the health of the castings.
  • the relaxing effect of the metal can, as a variant, be favored by an increasing section, from upstream to downstream, of the intermediate channels.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Casting Devices For Molds (AREA)
  • Separation By Low-Temperature Treatments (AREA)
  • Encapsulation Of And Coatings For Semiconductor Or Solid State Devices (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Mold Materials And Core Materials (AREA)
  • Continuous Casting (AREA)
  • Manufacture Of Motors, Generators (AREA)
  • Producing Shaped Articles From Materials (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
EP91401544A 1990-06-22 1991-06-11 Procédé, moule et installation pour la coulée de métal multi-étages sous basse pression Expired - Lifetime EP0463911B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9007860A FR2663570B1 (fr) 1990-06-22 1990-06-22 Procede, moule et installation pour la coulee de metal multi-etages sous basse pression.
FR9007860 1990-06-22

Publications (2)

Publication Number Publication Date
EP0463911A1 EP0463911A1 (fr) 1992-01-02
EP0463911B1 true EP0463911B1 (fr) 1995-03-22

Family

ID=9397915

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91401544A Expired - Lifetime EP0463911B1 (fr) 1990-06-22 1991-06-11 Procédé, moule et installation pour la coulée de métal multi-étages sous basse pression

Country Status (16)

Country Link
EP (1) EP0463911B1 (no)
JP (1) JPH07112593B2 (no)
AT (1) ATE120113T1 (no)
BR (1) BR9102619A (no)
CA (1) CA2044879C (no)
CS (1) CS188191A3 (no)
DE (1) DE69108306T2 (no)
DK (1) DK0463911T3 (no)
ES (1) ES2071941T3 (no)
FI (1) FI96097C (no)
FR (1) FR2663570B1 (no)
HU (1) HU206845B (no)
MX (1) MX173409B (no)
NO (1) NO178367C (no)
PL (1) PL168033B1 (no)
RU (1) RU2046034C1 (no)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
MY138164A (en) 2005-03-15 2009-04-30 Univ Malaya Glycolipids of branched chain alkyl oligosaccharides for liquid crystal and related applications
JP6350050B2 (ja) * 2014-07-10 2018-07-04 大同特殊鋼株式会社 減圧吸引鋳造方法
CN108080588B (zh) * 2018-01-22 2021-03-16 铜陵求精机械有限公司 一种铸渣机铸渣模
CN109317620A (zh) * 2018-11-30 2019-02-12 马鞍山市华威冶金机械有限公司 一种批量浇铸双螺杆挤塑机筒体衬套的模具及其浇铸方法
RU207520U1 (ru) * 2021-07-08 2021-11-01 Акционерное общество «Научно-производственная корпорация «Уралвагонзавод» имени Ф.Э. Дзержинского» Устройство для управления заливкой металла под низким давлением в форму

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3656539A (en) * 1969-01-29 1972-04-18 Amsted Ind Inc Apparatus for casting molten metal
FR2295808A1 (fr) * 1974-12-24 1976-07-23 Pont A Mousson Procede et installation de coulee sous basse pression en moule en sable
US4112997A (en) * 1977-02-28 1978-09-12 Hitchiner Manufacturing Co., Inc. Metal casting

Also Published As

Publication number Publication date
JPH04231143A (ja) 1992-08-20
NO912403L (no) 1991-12-23
FI96097B (fi) 1996-01-31
ES2071941T3 (es) 1995-07-01
FI96097C (fi) 1996-05-10
NO912403D0 (no) 1991-06-20
BR9102619A (pt) 1992-01-21
CA2044879C (fr) 1996-02-06
CA2044879A1 (fr) 1991-12-23
NO178367B (no) 1995-12-04
JPH07112593B2 (ja) 1995-12-06
ATE120113T1 (de) 1995-04-15
DE69108306T2 (de) 1995-08-03
PL290755A1 (en) 1992-02-24
HUT59045A (en) 1992-04-28
CS188191A3 (en) 1992-06-17
EP0463911A1 (fr) 1992-01-02
DE69108306D1 (de) 1995-04-27
PL168033B1 (pl) 1995-12-30
FI913009A (fi) 1991-12-23
FR2663570B1 (fr) 1992-09-18
RU2046034C1 (ru) 1995-10-20
FI913009A0 (fi) 1991-06-19
NO178367C (no) 1996-03-13
DK0463911T3 (da) 1995-08-14
FR2663570A1 (fr) 1991-12-27
HU912080D0 (en) 1991-12-30
MX173409B (es) 1994-03-01
HU206845B (en) 1993-01-28

Similar Documents

Publication Publication Date Title
EP0463910B1 (fr) Procédé d'alimentation en métal sous basse pression d'un moule en sable borgne, moule et installation de coulée correspondants
EP0463911B1 (fr) Procédé, moule et installation pour la coulée de métal multi-étages sous basse pression
EP0463909B1 (fr) Procédé, moule et installation de coulée de métal sous basse pression
EP2099576B1 (fr) Busette a jet creux pour coulee continue d'acier
EP0404641B1 (fr) Répartiteur de coulée continue d'acier
BE1008394A6 (fr) Dispositif de raccordement et d'echange d'un tube de coulee sur un recipient contenant un metal en fusion.
EP0907439B1 (fr) Lingotiere de coulee continue pour la coulee continue en charge verticale des metaux
EP0379407B1 (fr) Moule de coulée sous pression de produits plats métalliques tels que des brames
JPH0957422A (ja) 減圧鋳造法
FR2540759A1 (fr) Glissiere perfectionnee equipant une poche de coulee ou conteneur analogue
EP0379418B1 (fr) Procédé de coulée sous pression de produits plats métalliques tels que des brames et dispositif de mise en oeuvre de ce procédé
WO1990007999A1 (fr) Entretoise arriere d'un moule de coulee sous pression de produits plats metalliques tels que des brames
BE1015358A3 (fr) Procede et dispositif pour la coulee continue en charge d'un metal en fusion.
JP5646378B2 (ja) 傾動式重力鋳造装置及び傾動式重力鋳造法
FR2597770A1 (fr) Dispositif de moulage de pieces minces et de grandes dimensions en alliages d'aluminium
EP0943380A1 (fr) Installation de coulée en continu d'un produit métallique et procédés de mise en oeuvre d'une telle installation
EP0393005A2 (fr) Procédé et dispositif de refroidissement d'un produit métallique coulé en continu
FR2651160A1 (fr) Procede et dispositif pour couler des barres metalliques ou analogues.
EP0528723B1 (fr) Procédé de coulée en source à remplissage régulé et moule pour la mise en oeuvre de ce procédé
FR2607738A3 (fr) Dispositif pour l'alimentation en metal en fusion des lingotieres de coulee continue
CH114321A (fr) Procédé et appareil pour le moulage sous pression d'un métal fondu.
FR2642682A1 (fr) Dispositif de support et de reglage de la position d'une entretoise superieure d'un moule de coulee sous pression de produits plats metalliques tels que des brames
WO2017198500A1 (fr) Moule de coulée semi-continue verticale comportant un dispositif de refroidissement
FR2562821A1 (fr) Machine de moulage automatique par basse pression de pieces de fonderie
FR2647380A1 (fr) Procede et dispositif de moulage de metaux utilisant des modeles gazeifiables et un materiau de moulage sans liant

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19911002

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU NL SE

17Q First examination report despatched

Effective date: 19930727

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU NL SE

REF Corresponds to:

Ref document number: 120113

Country of ref document: AT

Date of ref document: 19950415

Kind code of ref document: T

ITF It: translation for a ep patent filed

Owner name: DR. SSA GIANNA BENEDUCE

REF Corresponds to:

Ref document number: 69108306

Country of ref document: DE

Date of ref document: 19950427

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2071941

Country of ref document: ES

Kind code of ref document: T3

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19950614

REG Reference to a national code

Ref country code: DK

Ref legal event code: T3

REG Reference to a national code

Ref country code: GR

Ref legal event code: FG4A

Free format text: 3016507

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19970603

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 19970612

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19970623

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GR

Payment date: 19970630

Year of fee payment: 7

Ref country code: NL

Payment date: 19970630

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19970701

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DK

Payment date: 19970723

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19970725

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19970728

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19970812

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: LU

Payment date: 19970910

Year of fee payment: 7

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980611

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980611

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980611

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980612

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980612

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980630

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980630

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980630

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980630

Ref country code: DK

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980630

BERE Be: lapsed

Owner name: S.A. PONT-A-MOUSSON

Effective date: 19980630

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990101

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19980611

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

EUG Se: european patent has lapsed

Ref document number: 91401544.1

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 19990101

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990401

REG Reference to a national code

Ref country code: DK

Ref legal event code: EBP

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20000503

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050611

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20100709

Year of fee payment: 20