EP1372887A1 - Verfahren zur behandlung von feuerfesten giessformen oder schalenformen beim vollformgiessen , insbesondere für aluminiumlegierungen - Google Patents

Verfahren zur behandlung von feuerfesten giessformen oder schalenformen beim vollformgiessen , insbesondere für aluminiumlegierungen

Info

Publication number
EP1372887A1
EP1372887A1 EP02706870A EP02706870A EP1372887A1 EP 1372887 A1 EP1372887 A1 EP 1372887A1 EP 02706870 A EP02706870 A EP 02706870A EP 02706870 A EP02706870 A EP 02706870A EP 1372887 A1 EP1372887 A1 EP 1372887A1
Authority
EP
European Patent Office
Prior art keywords
shell
refractory material
fluidized bed
metal
metallic material
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
EP02706870A
Other languages
English (en)
French (fr)
Other versions
EP1372887B1 (de
Inventor
Philippe Tedesco
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.)
Microcast
Original Assignee
Microcast
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 Microcast filed Critical Microcast
Publication of EP1372887A1 publication Critical patent/EP1372887A1/de
Application granted granted Critical
Publication of EP1372887B1 publication Critical patent/EP1372887B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/12—Treating moulds or cores, e.g. drying, hardening
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/02—Sand moulds or like moulds for shaped castings
    • B22C9/04—Use of lost patterns

Definitions

  • the present invention relates to a process for treating molds made of refractory material or shells intended for molding lost patterns of foundry parts, in particular aluminum alloys, with the aim of increasing the rate of solidification of these foundry parts.
  • the metal casting step is implemented in molds of refractory material called shells based on alumina silicate, sand, zircon, silica, ceramic or plaster which are manufactured in a preliminary stage.
  • the refractory material in the form of a refractory liquid slip is applied in layers around a model immersed in a tank stirred mechanically by means of a dusting machine or in a fluidized bed.
  • Foundry molds with lost models in shells generally have between 6 and 9 successive layers of refractory material in the case of light alloy foundries.
  • the model thus leaves its place in the shell in an imprint, in which the alloy can be cast by gravity, by low pressure casting or by suction, this in the open air, under vacuum or under controlled atmosphere.
  • the foundry piece thus molded is unchecked, that is to say it leaves the shell in which it was cast. then subjected to conventional finishing and heat treatment operations.
  • the lost-model molding process has the advantage of making it possible to obtain very thin casting parts having a complex geometry.
  • the object of the present invention is to remedy these drawbacks by proposing a process for the treatment of shells intended for molding lost patterns of foundry parts, in particular of aluminum alloy, making it possible to increase the cooling speed of these parts after the casting step.
  • this method is characterized in that, before and / or simultaneously with the casting step, a metallic material is applied to the outer layer of the shell in the form of small particles. These metallic particles come intimately into contact with the refractory material constituting the shell so as to form a composite shell of refractory material / metal which is much more compact. conductive of heat than the base shell and therefore dissipates calories much faster.
  • At least one layer based on a metallic material preferably in the form of particles, is applied to the outer layer of refractory material while it is not yet solidified. beads with a diameter of the order of 0.1 to 3 mm,
  • the refractory material / metal composite shell thus obtained is subjected to a firing step at a maximum temperature of 600 to 800 ° C., and - the metal, in particular the aluminum alloy constituting the part, is poured into this shell of foundry to be molded.
  • foundry molds with lost models in shells generally comprise several successive layers of refractory material.
  • This first variant of the invention therefore consists in replacing the last layer or the last two, three or four layers of refractory material of the shell with one or more layers based on metallic particles.
  • These layers can advantageously be applied by a method similar to the conventional method of applying the liquid refractory slip by using a dusting machine or in a fluidized bed tank, so that the metallic particles are adhered to the layer of external liquid slip just installed.
  • the shell is made of refractory material in a manner known per se,
  • this shell is subjected to a cooking step at a maximum temperature of 600 to 1100 ° C,
  • the metal in particular the aluminum alloy constituting the casting part to be molded, is poured into the shell thus positioned in the fluidized bed tank, and
  • the shell is kept in the fluidized bed tank until the casting is cooled.
  • the metallic particles which are in particular of aluminum, cast iron, steel or copper, come to stick to the refractory material of the shell by matching its external shape, and can thus perfectly fulfill their cooling function thereof. this.
  • the shell in the fluidized bed tank after immersion of the shell in the fluidized bed tank, it is subjected to a magnetic field so as to improve the adhesion of the metal particles on the shell of refractory material.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mold Materials And Core Materials (AREA)
  • Compositions Of Oxide Ceramics (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
EP02706870A 2001-04-02 2002-02-18 Verfahren zur behandlung von feuerfesten giessformen oder schalenformen beim vollformgiessen , insbesondere für aluminiumlegierungen Expired - Lifetime EP1372887B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0104444 2001-04-02
FR0104444A FR2822737B1 (fr) 2001-04-02 2001-04-02 Procede de traitement de moules en materiau refractaire ou carapaces destines au moulage a modeles perdus de pieces de fonderie en particulier en alliages d'aluminium
PCT/FR2002/000612 WO2002078877A1 (fr) 2001-04-02 2002-02-18 Procede de traitement de moules en materiau refractaire ou carapaces destines au moulage a modeles perdus de pieces de fonderie en particulier en alliages d'aluminium

Publications (2)

Publication Number Publication Date
EP1372887A1 true EP1372887A1 (de) 2004-01-02
EP1372887B1 EP1372887B1 (de) 2007-04-18

Family

ID=8861833

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02706870A Expired - Lifetime EP1372887B1 (de) 2001-04-02 2002-02-18 Verfahren zur behandlung von feuerfesten giessformen oder schalenformen beim vollformgiessen , insbesondere für aluminiumlegierungen

Country Status (5)

Country Link
EP (1) EP1372887B1 (de)
AT (1) ATE359883T1 (de)
DE (1) DE60219608D1 (de)
FR (1) FR2822737B1 (de)
WO (1) WO2002078877A1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2896711B1 (fr) * 2006-01-31 2008-07-25 Marc Lebreton Nouveau procede de moulage.
CN114147178B (zh) * 2021-12-15 2022-10-11 广州市荣泽模具有限公司 一种铝合金消失模铸造方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2806270A (en) * 1953-07-17 1957-09-17 Rolls Royce Method of making moulds for precision casting
GB746091A (en) * 1954-01-15 1956-03-07 Shell Cast Alloys Ltd Backing shell moulds in mould boxes
US2985929A (en) * 1959-12-18 1961-05-30 Richard T Carter Method and apparatus for support and cooling of shell molds
GB1132361A (en) * 1966-01-17 1968-10-30 Monsanto Chemicals Casting metals
DE1806277A1 (de) * 1968-10-31 1970-05-06 Bbc Brown Boveri & Cie Verfahren und Vorrichtung zum Abstuetzen von Formmasken

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO02078877A1 *

Also Published As

Publication number Publication date
WO2002078877A1 (fr) 2002-10-10
FR2822737A1 (fr) 2002-10-04
ATE359883T1 (de) 2007-05-15
FR2822737B1 (fr) 2003-08-01
EP1372887B1 (de) 2007-04-18
DE60219608D1 (de) 2007-05-31

Similar Documents

Publication Publication Date Title
EP2516687B1 (de) Formteil aus cu enthaltender aluminium-legierung mit hohen mechanischer festigkeit und warmem kriechen
FR2969176A1 (fr) Procede de fabrication d'une piece en alliages d'aluminium moule avec trempe apres demoulage
FR2818288A1 (fr) PROCEDE DE FABRICATION D'UNE PIECE DE SECURITE EN ALLIAGE Al-Si
EP3129516B1 (de) Wärmebehandlung einer aluminium-titan-basis-legierung
EP1063033B1 (de) Verfahren zur Herstellung eines Werkstücks aus Metall, wie ein Teil eines Fahrzeugrads, und entsprechendes Rad
JP2010163644A (ja) アルミニウムダイカスト合金、この合金からなる鋳造コンプレッサ羽根車およびその製造方法
EP1372887A1 (de) Verfahren zur behandlung von feuerfesten giessformen oder schalenformen beim vollformgiessen , insbesondere für aluminiumlegierungen
CN107649658B (zh) 一种铝合金型缸套的制备工艺
CA2270751A1 (fr) Procede pour fabriquer des pieces en alliages coules, et notamment en aluminium
EP3894107A1 (de) Verbesserter giessschlamm zur herstellung von formschalen
EP2158987A1 (de) Präzisionsgussverfahren und verlorenes Modell für dieses Verfahren
WO2016120541A1 (fr) Procede d'obtention d'une piece en alliage d'aluminium bas silicium
EP0479672B1 (de) Lösliche Maskenform für die Giesserei und Verfahren zur Entsorgung
EP1704948B1 (de) Schleiffestes Rohr aus Metall und Verfahren zu seiner Herstellung
EP1213367A1 (de) Verfahren zur Herstellung von Gussteilen aus Leichtmetall-Legierungen mit Kühlung vor dem Pressen
FR2835207A1 (fr) Moule a sechage rapide destine a la fonderie a la cire perdue ainsi que le procede de fabrication d'un tel moule
JP2003147459A (ja) 銅合金鋳造部材および銅合金鋳造部材の製造方法
FR2825376A1 (fr) PROCEDE DE FABRICATION D'UN ARTICLE MOULE RESISTANT A L'USURE EN ALLIAGE A1-Si
FR2819205A1 (fr) Noyau de fonderie a base de borates de potassium et procede de fabrication d'un tel noyau
JPS613649A (ja) ロッカーアームの製造方法
FR2990404A1 (fr) Procede de fabrication d'une roue de vehicule par traitement de surface mecanique et revelation de grains par attaque chimique
EP0015819B1 (de) Verfahren zur Herstellung von Gegenständen, insbesondere aus Gusseisen mit Kugelgraphit
JP2001240929A (ja) アルミホイールおよびその製造方法
BE690049A (de)
EP1550522A1 (de) Verfahren zur Herstellung von gratfreien Werkstücken aus Leichtmetall-Legierung mit Kühlung vor dem Pressen

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: 20031002

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

AX Request for extension of the european patent

Extension state: AL LT LV MK RO SI

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

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 CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

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

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070418

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: FRENCH

REF Corresponds to:

Ref document number: 60219608

Country of ref document: DE

Date of ref document: 20070531

Kind code of ref document: P

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

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070718

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 FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070729

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

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070918

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
GBV Gb: ep patent (uk) treated as always having been void in accordance with gb section 77(7)/1977 [no translation filed]

Effective date: 20070418

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 FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070418

REG Reference to a national code

Ref country code: IE

Ref legal event code: FD4D

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

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070418

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070418

Ref country code: IE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070418

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

Effective date: 20080121

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 FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070719

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070418

Ref country code: DE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070719

Ref country code: GB

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070418

BERE Be: lapsed

Owner name: MICROCAST

Effective date: 20080228

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

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

Ref country code: CH

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

Effective date: 20080229

Ref country code: LI

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

Effective date: 20080229

Ref country code: MC

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

Effective date: 20080228

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20081031

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

Ref country code: BE

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

Effective date: 20080228

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

Ref country code: FR

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

Effective date: 20080229

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

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070418

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

Ref country code: LU

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

Effective date: 20080218

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

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070418