EP0022808B1 - Verfahren zum verdichten von formsanden - Google Patents

Verfahren zum verdichten von formsanden Download PDF

Info

Publication number
EP0022808B1
EP0022808B1 EP80900151A EP80900151A EP0022808B1 EP 0022808 B1 EP0022808 B1 EP 0022808B1 EP 80900151 A EP80900151 A EP 80900151A EP 80900151 A EP80900151 A EP 80900151A EP 0022808 B1 EP0022808 B1 EP 0022808B1
Authority
EP
European Patent Office
Prior art keywords
sand
compacting
mould
space
model
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
Application number
EP80900151A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0022808A1 (de
Inventor
Lumir Zadera
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=4200975&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0022808(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority to AT80900151T priority Critical patent/ATE1221T1/de
Application filed by Georg Fischer AG filed Critical Georg Fischer AG
Publication of EP0022808A1 publication Critical patent/EP0022808A1/de
Application granted granted Critical
Publication of EP0022808B1 publication Critical patent/EP0022808B1/de
Expired 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
    • B22C15/28—Compacting by different means acting simultaneously or successively, e.g. preliminary blowing and finally pressing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C15/00—Moulding machines characterised by the compacting mechanism; Accessories therefor

Definitions

  • the invention relates to a method for compacting molding sand for a casting mold, using a model plate with a model and an opposing press plate, the molding sand being poured into a mold space located between the model plate and the press plate, precompressed and mechanically recompressed.
  • the disadvantage here is that the models are subject to a relatively large amount of wear due to the abrasive effect of the molding sand particles accelerated when shot in.
  • a significant energy requirement is necessary for the shooting, which has an unfavorable effect on the cost structure of the mold production.
  • Achieving a uniformly high mold hardness, especially in the area of the mold close to the model, is not only desirable in connection with molds produced by injecting the molding sand, but completely independently of the type of sand introduction into the mold box and is known to be achieved in connection with mechanical sand introduction, for example, by Shaking with subsequent mechanical pressing is generally well accomplished. Since shaking is becoming increasingly unpopular due to the noise and vibrations associated with it, there is a need to use other, more environmentally friendly and productive methods to produce a uniformly good casting mold with perfect mold hardening.
  • a mold box and a filling frame assigned to it are placed on a model plate and enclosing a model, and a metered amount of molding sand is poured into the mold space formed by the model plate, the molding box or the filling frame, using gravity and then a lid that can be placed on the filling frame is connected to the filling frame or molding box.
  • An explosive pressure surge is now exerted on the sand surface in the molding space formed between the molding sand surface, the filling frame or molding box and with the lid, and the molding sand mass is thus pre-compressed.
  • the sand is mechanically or subsequently compacted by means of the press plate.
  • a fuel brought to detonation-type or explosive combustion is advantageously used, which can also burn in a shock-induced manner.
  • a depressurized, high-tension, vaporous or gaseous medium is readily possible to use as pressure surge.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Devices For Molds (AREA)
  • Saccharide Compounds (AREA)
  • Steroid Compounds (AREA)
EP80900151A 1979-02-02 1980-08-15 Verfahren zum verdichten von formsanden Expired EP0022808B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80900151T ATE1221T1 (de) 1979-02-02 1980-01-24 Verfahren zum verdichten von formsanden.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1037/79 1979-02-02
CH103779A CH637044A5 (de) 1979-02-02 1979-02-02 Verfahren zum verdichten von formsand in einer formvorrichtung.

Publications (2)

Publication Number Publication Date
EP0022808A1 EP0022808A1 (de) 1981-01-28
EP0022808B1 true EP0022808B1 (de) 1982-06-23

Family

ID=4200975

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80900151A Expired EP0022808B1 (de) 1979-02-02 1980-08-15 Verfahren zum verdichten von formsanden

Country Status (14)

Country Link
US (1) US4415015A (da)
EP (1) EP0022808B1 (da)
AU (1) AU5487180A (da)
CA (1) CA1145112A (da)
CH (1) CH637044A5 (da)
DD (1) DD148734A5 (da)
DE (1) DE3060563D1 (da)
DK (1) DK412280A (da)
ES (1) ES488173A1 (da)
IT (1) IT1130875B (da)
NO (1) NO802904L (da)
PL (1) PL221739A1 (da)
WO (1) WO1980001544A1 (da)
ZA (1) ZA80311B (da)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3025993C2 (de) * 1980-07-09 1983-11-10 Sintokogio, Ltd., Nagoya, Aichi Formvorrichtung zur Explosionsverdichtung eines sandartigen Füllmaterials
CH650175A5 (de) * 1981-01-23 1985-07-15 Fischer Ag Georg Verfahren und einrichtung zum dosieren von brennstoffen bei der herstellung von giessereisandformen.
JPS58500474A (ja) * 1981-04-02 1983-03-31 ベ−エムデ−・バ−ディッシェ・マシ−ネンファブリ−ク・ドゥルラッハ・ゲ−エムベ−ハ− 型砂の空気圧圧縮法及び装置
CH653579A5 (de) * 1981-07-20 1986-01-15 Fischer Ag Georg Verfahren zum verdichten von koernigen formstoffen, insbesondere giessereiformstoffen, und vorrichtung zur durchfuehrung des verfahrens.
DE3149172A1 (de) * 1981-12-11 1983-06-30 Georg Fischer AG, 8201 Schaffhausen "verfahren zur herstellung von formkoerpern mittels gasdruck"
CH672270A5 (da) * 1986-12-17 1989-11-15 Fischer Ag Georg
DE3900324A1 (de) * 1989-01-07 1990-07-12 Dorstener Maschf Ag Verfahren und presse zum herstellen von formkernen aus formsand fuer die giessereitechnik
CH682547A5 (de) * 1990-04-20 1993-10-15 Fischer Ag Georg Verfahren und Vorrichtung zum Verdichten von körnigen Formstoffen.
CH686412A5 (de) * 1992-03-10 1996-03-29 Fischer Georg Giessereianlagen Verfahren zum Verdichten von Formsand fuer Giessformen.
WO2001036129A1 (de) * 1999-11-18 2001-05-25 Hottinger Maschinenbau Gmbh Verfahren zur herstellung von gussformen

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB728015A (en) * 1952-02-25 1955-04-13 Buhrer Erwin Method for charging and jolting for the purpose of compacting granular materials in moulding flasks
US3030678A (en) * 1959-09-08 1962-04-24 Sr William J Huston Method of disintegrating a sand mold while in association with a flask and a casting
US3170202A (en) * 1962-08-22 1965-02-23 Sr William J Huston Foundry process
US3807483A (en) * 1971-01-08 1974-04-30 E Buhler Methods and apparatus for producing sand molds
DE2128371A1 (de) * 1971-06-08 1972-12-28 Dynamit Nobel Ag, 5210 Troisdorf Verfahren zum Verdichten von körnigen Materialien durch Explosionsdruck
DE2242812B2 (de) * 1972-08-31 1977-06-23 Hüttenes-Albertus Chemische Werke GmbH, 4000 Düsseldorf Verfahren zum haerten von saeurehaertbaren formstoffgemischen
AT381877B (de) * 1978-12-15 1986-12-10 Fischer Ag Georg Verfahren und vorrichtung zum verdichten von koernigen stoffen, insbesondere giessereiformstoff

Also Published As

Publication number Publication date
US4415015A (en) 1983-11-15
IT1130875B (it) 1986-06-18
CH637044A5 (de) 1983-07-15
ZA80311B (en) 1981-01-28
DK412280A (da) 1980-09-30
DD148734A5 (de) 1981-06-10
EP0022808A1 (de) 1981-01-28
DE3060563D1 (en) 1982-08-12
NO802904L (no) 1980-10-01
WO1980001544A1 (fr) 1980-08-07
CA1145112A (en) 1983-04-26
AU5487180A (en) 1980-08-07
PL221739A1 (da) 1980-10-20
ES488173A1 (es) 1980-10-01
IT8019351A0 (it) 1980-01-22

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