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EP0058180A1 - Procédé pour refroidir des moules en sable et des pièces métalliques coulées, application de ce procédé et appareil pour la mise en oeuvre de ce procédé. - Google Patents

Procédé pour refroidir des moules en sable et des pièces métalliques coulées, application de ce procédé et appareil pour la mise en oeuvre de ce procédé.

Info

Publication number
EP0058180A1
EP0058180A1 EP81902308A EP81902308A EP0058180A1 EP 0058180 A1 EP0058180 A1 EP 0058180A1 EP 81902308 A EP81902308 A EP 81902308A EP 81902308 A EP81902308 A EP 81902308A EP 0058180 A1 EP0058180 A1 EP 0058180A1
Authority
EP
European Patent Office
Prior art keywords
casting
sand
quenching
sand molds
medium
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
EP81902308A
Other languages
German (de)
English (en)
Other versions
EP0058180B1 (fr
Inventor
Anton Alt
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.)
Georg Fischer AG
Original Assignee
Georg Fischer 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 Georg Fischer AG filed Critical Georg Fischer AG
Priority to AT81902308T priority Critical patent/ATE9879T1/de
Publication of EP0058180A1 publication Critical patent/EP0058180A1/fr
Application granted granted Critical
Publication of EP0058180B1 publication Critical patent/EP0058180B1/fr
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
    • B22D27/04—Influencing the temperature of the metal, e.g. by heating or cooling the mould

Definitions

  • the invention relates to a casting process for metals using shell-shaped sand molds consolidated by a chemical reaction, the application of this process to molten iron, and a casting device suitable for carrying out the process.
  • the invention seeks to remedy this.
  • the invention as characterized in the claims, solves the problem in the solidifying metal form quickly to develop a stable edge shell and to produce a fine-grained structure, in particular in the case of graphitically solidifying iron, the additional volume resulting from the graphite precipitation should be used in an inward-facing manner to compensate for the solidification volume deficit.
  • the impregnation of the outer surfaces of the sand shells with a water-repellent substance for example silicone, which means that the shells filled with the metal, e.g. with water or water vapor, can be quenched without quenching liquid can penetrate through the sand bowls (masks) to the iron.
  • a water-repellent substance for example silicone
  • the quenching of the castings according to the invention also brings about a significant improvement in the mechanical properties.
  • the method according to the invention offers cost advantages over die casting since the expensive die casting molds are eliminated.
  • the good, die-cast-like, mechanical properties of the castings produced by the process according to the invention are due to the fact that, on the one hand, a rapid-release heat dissipation produces a fine-grained structure, and on the other hand, after cooling, the mixed crystal enriched with alloy additives, depending on the cooling rate, is similar to the die-casting process partly remains in the supersaturated state and thus has a certain hardening ability.
  • the masks can be made according to the prior art, e.g. by adding a binder to the sand that hardens.
  • a binder e.g., a binder that hardens.
  • One such process is the croning process, in which the sand is bound by phenolic resins.
  • the wall thickness of the shells is preferably at least 3 mm.
  • the shell-shaped molded parts are completed as usual to form the mold, with the impregnation For example, with silicone before assembling, but preferably only after assembling to avoid untreated areas on the contact surface of the shells.
  • the sand masks can be sprayed with quenching liquid or vapor or can be completely immersed in a quenching bath.
  • Water or water vapor is preferably used as a deterrent.
  • the time of adding water depends on the cast metal and the wall thickness of the casting.
  • aluminum or very thin-walled cast iron e.g. Connecting rods can have the mold washed with water during casting.
  • thick-walled parts e.g. Crankshafts are watered a few seconds after the casting.
  • Steel gravel, quartz gravel or quartz sand, as well as other granular masses or solid supports are particularly suitable as support means.
  • the quenching liquid itself can also be used as a proppant in a closed container.
  • the coolant is removed at a mask temperature of 600 - 700o, the masks glow more or less and disintegrate when unpacking.
  • the The mask is removed in a water bath or while spraying with a spray, which has the following advantages:
  • a phenol formaldehyde binder develops 20 - 25% methane and 25 - 30% carbon monoxide when heated to casting temperature, which has considerable dangers for humans.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mold Materials And Core Materials (AREA)

Abstract

Dans ce procede les formes de moulage en sable sont rendues imperme a l'eau. Le trempage est obtenu a partir de l'exterieur au moyen d'un fluide convenable, apres que les formes de moulage aient ete remplies de metal ou pendant l'operation de remplissage. De facon avantageuse, les formes de moulage liees par des matieres organiques sont amenees a une temperature de trempage ne produisant pas une decomposition gazeuse du liant organique.
EP81902308A 1980-08-29 1981-08-04 Procédé pour refroidir des moules en sable et des pièces métalliques coulées, application de ce procédé et appareil pour la mise en oeuvre de ce procédé Expired EP0058180B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81902308T ATE9879T1 (de) 1980-08-29 1981-08-04 Verfahren zum abschrecken von in schalenfoermigen sandformen vergossenen metallgussstuecken, dessen anwendung und eine vorrichtung zur durchfuehrung des verfahrens.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH6513/80 1980-08-29
CH6513/80A CH650430A5 (de) 1980-08-29 1980-08-29 Verfahren zum giessen von metallen mittels phenolharzgebundenen sandformen.

Publications (2)

Publication Number Publication Date
EP0058180A1 true EP0058180A1 (fr) 1982-08-25
EP0058180B1 EP0058180B1 (fr) 1984-10-17

Family

ID=4310798

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81902308A Expired EP0058180B1 (fr) 1980-08-29 1981-08-04 Procédé pour refroidir des moules en sable et des pièces métalliques coulées, application de ce procédé et appareil pour la mise en oeuvre de ce procédé

Country Status (11)

Country Link
EP (1) EP0058180B1 (fr)
JP (1) JPS57501828A (fr)
BE (1) BE890139A (fr)
BR (1) BR8108968A (fr)
CA (1) CA1165967A (fr)
CH (1) CH650430A5 (fr)
DK (1) DK190882A (fr)
FI (1) FI69412C (fr)
IT (1) IT1138537B (fr)
PT (1) PT73559B (fr)
WO (1) WO1982000786A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180369906A1 (en) * 2015-04-01 2018-12-27 Saint Jean Industries Sand shell-moulding method for the production of a part for use in the automotive and aeronautics fields

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2633206B1 (fr) * 1988-06-24 1990-10-12 Peugeot Moule pour la fabrication d'une piece metallique, utilisation de ce moule et procede de moulage correspondant
FR2680125B1 (fr) * 1991-08-09 1995-02-17 Peugeot Procede et dispositif de moulage en carapace avec coquille rigide refroidie.
DE10357618B4 (de) * 2003-12-10 2008-01-24 Bender, Wilfried, Dr. Verfahren zum Herstellen eines Gussteils aus einer Metallschmelze

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE734046C (de) * 1941-05-20 1943-04-07 Heinrich Lanz Ag Verfahren zur Verhuetung des Vordringens der Feuchtigkeit aus dem Fuellsand in die Modellsandschicht bei Gussformen
FR1039893A (fr) * 1950-08-04 1953-10-12 Ford Procédé et appareil pour les traitements thermiques, tels que la trempe des pièces moulées
US2968848A (en) * 1959-01-02 1961-01-24 Richard T Carter Method of casting refractory shells
US2985929A (en) * 1959-12-18 1961-05-30 Richard T Carter Method and apparatus for support and cooling of shell molds
DE1241051B (de) * 1961-08-12 1967-05-24 Deutsche Edelstahlwerke Ag Vorrichtung zum Giessen von metallischen Werkstuecken
FR1351085A (fr) * 1963-03-12 1964-01-31 Moule de fonderie
US3404724A (en) * 1966-02-01 1968-10-08 Amsted Ind Inc Method of casting in a shell molding
US3409069A (en) * 1966-02-01 1968-11-05 Amsted Ind Inc Method of casting steel in a shell mold
JPS5638565Y2 (fr) * 1977-08-06 1981-09-09
DE2806995A1 (de) * 1978-02-18 1979-08-30 Avesta Jernverks Ab Verfahren und vorrichtung zum giessen in duennwandigen giessformen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8200786A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180369906A1 (en) * 2015-04-01 2018-12-27 Saint Jean Industries Sand shell-moulding method for the production of a part for use in the automotive and aeronautics fields

Also Published As

Publication number Publication date
PT73559A (de) 1981-09-01
FI823324A0 (fi) 1982-09-28
FI823324L (fi) 1982-09-28
DK190882A (da) 1982-04-28
CH650430A5 (de) 1985-07-31
EP0058180B1 (fr) 1984-10-17
CA1165967A (fr) 1984-04-24
IT1138537B (it) 1986-09-17
FI69412B (fi) 1985-10-31
WO1982000786A1 (fr) 1982-03-18
PT73559B (de) 1983-01-17
JPS57501828A (fr) 1982-10-14
FI69412C (fi) 1986-02-10
BR8108968A (pt) 1983-01-11
IT8123692A0 (it) 1981-08-28
BE890139A (fr) 1981-12-16

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