EP0096045A1 - Verfahren zur herstellung von abformungen mit formsand oder einem sonstigen gemisch aus grundstoffteilchen - Google Patents

Verfahren zur herstellung von abformungen mit formsand oder einem sonstigen gemisch aus grundstoffteilchen

Info

Publication number
EP0096045A1
EP0096045A1 EP82903449A EP82903449A EP0096045A1 EP 0096045 A1 EP0096045 A1 EP 0096045A1 EP 82903449 A EP82903449 A EP 82903449A EP 82903449 A EP82903449 A EP 82903449A EP 0096045 A1 EP0096045 A1 EP 0096045A1
Authority
EP
European Patent Office
Prior art keywords
pressure
ata
mixture
material particles
seconds
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.)
Withdrawn
Application number
EP82903449A
Other languages
German (de)
English (en)
French (fr)
Inventor
Christoph Landolt
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
Publication of EP0096045A1 publication Critical patent/EP0096045A1/de
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C15/00—Moulding machines characterised by the compacting mechanism; Accessories therefor

Definitions

  • the present invention relates to a method for producing impressions with molding sand or another deformable mixture of base material particles, binder, water and optionally additives by means of a pressure surge in a closed space.
  • a number of processes are known which bring about the production of shaped bodies by means of a pressure surge.
  • a deformable mixture e.g. Molding sand built up a gas pressure and then dismantled again.
  • the invention has for its object to select an area of the pressure curve within which an optimal compression of the deformable mixture is ensured.
  • This area is characterized in that the deformable mixture is applied using a pressure increase gradient exposed to a gas pressure of at least 2 ata of at least 50 ata / s, maintains this minimum pressure for at least 0.01 seconds and reduces to normal pressure within at least 0.2 seconds since the beginning of the pressure increase.
  • the pressure surge generated should be brought to the sand surface with a low final pressure as a mass flow by changing the amount of air per unit of time and then brought to normal pressure.
  • a pressure maximum of 4 to 5.5 ata in the combustion chamber represents an optimum between the desired strength values of the sand molds and the sealing effort of the combustion chamber.
  • the speed of propagation for elastic longitudinal waves of such particles was determined with respect to the selection of the base material particles, a value of 4 to 7 km / s, preferably that of 5.8 to 6.0 km / seconds, proving to be particularly favorable.
  • Base particles with a majority silicon dioxide content were used for the experiments, the compressibility being 27 to 60%, preferably 32 to 45%.
  • the described method is preferably used for the precise molding of models, the optimal values determined being set and combined in such a way that a pressure of 80 to 180 N / cm 2 preferably arises on the model surface.
  • the limit values determined in this way for the pressure increase, for the maximum value and for the pressure reduction indicate values for optimal operation of a sand compacting system.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Devices For Molds (AREA)
  • Mold Materials And Core Materials (AREA)
EP82903449A 1981-12-11 1982-12-09 Verfahren zur herstellung von abformungen mit formsand oder einem sonstigen gemisch aus grundstoffteilchen Withdrawn EP0096045A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3149172 1981-12-11
DE19813149172 DE3149172A1 (de) 1981-12-11 1981-12-11 "verfahren zur herstellung von formkoerpern mittels gasdruck"

Publications (1)

Publication Number Publication Date
EP0096045A1 true EP0096045A1 (de) 1983-12-21

Family

ID=6148519

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82903449A Withdrawn EP0096045A1 (de) 1981-12-11 1982-12-09 Verfahren zur herstellung von abformungen mit formsand oder einem sonstigen gemisch aus grundstoffteilchen

Country Status (11)

Country Link
US (2) US4546810A (it)
EP (1) EP0096045A1 (it)
JP (1) JPS58502090A (it)
AU (1) AU1013183A (it)
CA (1) CA1217620A (it)
DD (1) DD208311B5 (it)
DE (1) DE3149172A1 (it)
DK (1) DK364983D0 (it)
IT (1) IT1191115B (it)
WO (1) WO1983002078A1 (it)
ZA (1) ZA829066B (it)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3344520A1 (de) * 1983-12-09 1985-06-20 BMD Badische Maschinenfabrik Durlach GmbH, 7500 Karlsruhe Vorrichtung zum verdichten von giesserei-formstoff mittels druckgas
CH666636A5 (de) * 1984-01-09 1988-08-15 Fischer Ag Georg Verfahren zum verdichten von koernigen formstoffen.
CH672270A5 (it) * 1986-12-17 1989-11-15 Fischer Ag Georg
DE3836876C2 (de) * 1988-10-29 1994-06-09 Badische Maschf Gmbh Verfahren und Vorrichtung zum Verdichten von Gießerei-Formstoff
US5202837A (en) * 1990-07-12 1993-04-13 Coe Carlos J Material consolidation modeling and control system
US5136497A (en) * 1990-07-12 1992-08-04 Bdm International, Inc. Material consolidation modeling and control system
CH686412A5 (de) * 1992-03-10 1996-03-29 Fischer Georg Giessereianlagen Verfahren zum Verdichten von Formsand fuer Giessformen.
KR100971696B1 (ko) 2000-10-11 2010-07-22 유나이티드 비디오 프로퍼티즈, 인크. 데이터의 기억 장치를 주문형 매체 배달 시스템의 서버에 제공하기 위한 시스템 및 방법

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2847736A (en) * 1954-12-31 1958-08-19 Pulvermacher Dietrich Device for making sand molds for metal casting
US3170202A (en) * 1962-08-22 1965-02-23 Sr William J Huston Foundry process
DE1961234C3 (de) * 1969-12-05 1975-02-06 Kramatorskij Nautschno-Issledowatel' Skij I Projektno-Technologitscheskij Institut Maschinostrojenija, Kramatorsk (Sowjetunion) Verfahren und Vorrichtung zum Verdichten von GieBereiformmassen
DE2128371A1 (de) * 1971-06-08 1972-12-28 Dynamit Nobel Ag, 5210 Troisdorf Verfahren zum Verdichten von körnigen Materialien durch Explosionsdruck
DE2249244A1 (de) * 1972-10-07 1974-04-11 Buderus Eisenwerk Verfahren zum gleichzeitigen verdichten und aushaerten von haertbaren formstoffen
JPS55147462A (en) * 1979-05-08 1980-11-17 Sintokogio Ltd Molding method of lower mold and squeeze plate device
DE2844464C2 (de) * 1978-10-12 1983-03-24 Bühler, Eugen, Dipl.-Ing., 8871 Burtenbach Verfahren und Vorrichtung zum Verdichten von Gießformen
AT381877B (de) * 1978-12-15 1986-12-10 Fischer Ag Georg Verfahren und vorrichtung zum verdichten von koernigen stoffen, insbesondere giessereiformstoff
CH637044A5 (de) * 1979-02-02 1983-07-15 Fischer Ag Georg Verfahren zum verdichten von formsand in einer formvorrichtung.
CH640757A5 (de) * 1979-04-04 1984-01-31 Fischer Ag Georg Verfahren und einrichtung zum verdichten von formstoffen.
JPS55133847A (en) * 1979-04-05 1980-10-18 Sintokogio Ltd Molding method of mold and device thereof
JPS55136543A (en) * 1979-04-11 1980-10-24 Sintokogio Ltd Cover device of mold molding machine
JPS55141355A (en) * 1979-04-19 1980-11-05 Sintokogio Ltd Mold molding method and its device
CH648498A5 (de) * 1980-11-06 1985-03-29 Fischer Ag Georg Verfahren zum verdichten von koernigen stoffen, insbesondere giessereiformstoffen.
WO1982003348A1 (en) * 1981-04-02 1982-10-14 Koebel Alfons Method and device for pneumatically compacting molding sand

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8302078A1 *

Also Published As

Publication number Publication date
AU1013183A (en) 1983-06-30
IT1191115B (it) 1988-02-24
WO1983002078A1 (en) 1983-06-23
IT8224627A1 (it) 1984-06-06
DE3149172A1 (de) 1983-06-30
DK364983A (da) 1983-08-10
JPS58502090A (ja) 1983-12-08
IT8224627A0 (it) 1982-12-06
DD208311B5 (de) 1994-08-25
USRE32622E (en) 1988-03-15
CA1217620A (en) 1987-02-10
ZA829066B (en) 1983-09-28
DD208311A5 (de) 1984-05-02
US4546810A (en) 1985-10-15
DK364983D0 (da) 1983-08-10

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Legal Events

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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

AK Designated contracting states

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

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

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18D Application deemed to be withdrawn

Effective date: 19840227

RIN1 Information on inventor provided before grant (corrected)

Inventor name: LANDOLT, CHRISTOPH