WO1982000786A1 - Metal molding process using sand hollow forms - Google Patents

Metal molding process using sand hollow forms Download PDF

Info

Publication number
WO1982000786A1
WO1982000786A1 PCT/EP1981/000110 EP8100110W WO8200786A1 WO 1982000786 A1 WO1982000786 A1 WO 1982000786A1 EP 8100110 W EP8100110 W EP 8100110W WO 8200786 A1 WO8200786 A1 WO 8200786A1
Authority
WO
WIPO (PCT)
Prior art keywords
casting
sand
sand molds
medium
quenching
Prior art date
Application number
PCT/EP1981/000110
Other languages
German (de)
English (en)
French (fr)
Inventor
Gmbh G Fischer
Original Assignee
Alt A
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 Alt A filed Critical Alt A
Priority to DE8181902308T priority Critical patent/DE3166714D1/de
Priority to BR8108968A priority patent/BR8108968A/pt
Publication of WO1982000786A1 publication Critical patent/WO1982000786A1/en
Priority to DK190882A priority patent/DK190882A/da
Priority to NO821408A priority patent/NO159248C/no
Priority to FI823324A priority patent/FI69412C/fi

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)
PCT/EP1981/000110 1980-08-29 1981-08-04 Metal molding process using sand hollow forms WO1982000786A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE8181902308T DE3166714D1 (en) 1980-08-29 1981-08-04 Method for quenching sand hollow forms and cast metallic pieces, application of that method and apparatus for carrying out that method
BR8108968A BR8108968A (pt) 1980-08-29 1981-08-04 Processo de fundicao para metais com aplicacao de moldes de areia em forma de coquilhas
DK190882A DK190882A (da) 1980-08-29 1982-04-28 Stoebefremgangsmaade til metaller under anvendelse af skalformede samdforme
NO821408A NO159248C (no) 1980-08-29 1982-04-28 Fremgangsmaate for aa oppnaa hurtig avkjoeling av stoepegods iskallsandformer.
FI823324A FI69412C (fi) 1980-08-29 1982-09-28 Foerfarande foer snabb avkylning av metallgjutstycken

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH6513/80800829 1980-08-29
CH6513/80A CH650430A5 (de) 1980-08-29 1980-08-29 Verfahren zum giessen von metallen mittels phenolharzgebundenen sandformen.

Publications (1)

Publication Number Publication Date
WO1982000786A1 true WO1982000786A1 (en) 1982-03-18

Family

ID=4310798

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1981/000110 WO1982000786A1 (en) 1980-08-29 1981-08-04 Metal molding process using sand hollow forms

Country Status (11)

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

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0348248A1 (fr) * 1988-06-24 1989-12-27 Automobiles Peugeot Moule pour la fabrication d'une pièce métallique, utilisation de ce moule et procédé de moulage correspondant
FR2680125A1 (fr) * 1991-08-09 1993-02-12 Peugeot Procede et dispositif de moulage en carapace avec coquille rigide refroidie.
DE10357618A1 (de) * 2003-12-10 2005-07-14 Hydro Aluminium Deutschland Gmbh Verfahren zum Herstellen eines Gussteils aus einer Metallschmelze

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3034332A1 (fr) * 2015-04-01 2016-10-07 Saint Jean Ind Procede de moulage en carapace sable pour la realisation d'une piece dans le domaine de l'automobile et de l'aeronautique

Citations (9)

* 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
FR1351085A (fr) * 1963-03-12 1964-01-31 Moule de fonderie
DE1241051B (de) * 1961-08-12 1967-05-24 Deutsche Edelstahlwerke Ag Vorrichtung zum Giessen von metallischen Werkstuecken
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
DE2806995A1 (de) * 1978-02-18 1979-08-30 Avesta Jernverks Ab Verfahren und vorrichtung zum giessen in duennwandigen giessformen

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5638565Y2 (it) * 1977-08-06 1981-09-09

Patent Citations (9)

* 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
DE2806995A1 (de) * 1978-02-18 1979-08-30 Avesta Jernverks Ab Verfahren und vorrichtung zum giessen in duennwandigen giessformen

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0348248A1 (fr) * 1988-06-24 1989-12-27 Automobiles Peugeot Moule pour la fabrication d'une pièce métallique, utilisation de ce moule et procédé de moulage correspondant
FR2633206A1 (fr) * 1988-06-24 1989-12-29 Peugeot Moule pour la fabrication d'une piece metallique, utilisation de ce moule et procede de moulage correspondant
FR2680125A1 (fr) * 1991-08-09 1993-02-12 Peugeot Procede et dispositif de moulage en carapace avec coquille rigide refroidie.
DE10357618A1 (de) * 2003-12-10 2005-07-14 Hydro Aluminium Deutschland Gmbh Verfahren zum Herstellen eines Gussteils aus einer Metallschmelze
DE10357618B4 (de) * 2003-12-10 2008-01-24 Bender, Wilfried, Dr. Verfahren zum Herstellen eines Gussteils aus einer Metallschmelze

Also Published As

Publication number Publication date
FI823324L (fi) 1982-09-28
CA1165967A (en) 1984-04-24
PT73559B (de) 1983-01-17
EP0058180B1 (de) 1984-10-17
EP0058180A1 (de) 1982-08-25
FI823324A0 (fi) 1982-09-28
IT1138537B (it) 1986-09-17
JPS57501828A (it) 1982-10-14
BR8108968A (pt) 1983-01-11
FI69412C (fi) 1986-02-10
CH650430A5 (de) 1985-07-31
IT8123692A0 (it) 1981-08-28
FI69412B (fi) 1985-10-31
BE890139A (fr) 1981-12-16
PT73559A (de) 1981-09-01
DK190882A (da) 1982-04-28

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