EP0115848B1 - Verfahren und Vorrichtung zum Trennen eines Modells von einer Form - Google Patents

Verfahren und Vorrichtung zum Trennen eines Modells von einer Form Download PDF

Info

Publication number
EP0115848B1
EP0115848B1 EP84100992A EP84100992A EP0115848B1 EP 0115848 B1 EP0115848 B1 EP 0115848B1 EP 84100992 A EP84100992 A EP 84100992A EP 84100992 A EP84100992 A EP 84100992A EP 0115848 B1 EP0115848 B1 EP 0115848B1
Authority
EP
European Patent Office
Prior art keywords
pattern
mold
gear
air
pattern plate
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 - Lifetime
Application number
EP84100992A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0115848A2 (de
EP0115848A3 (en
Inventor
Eugen Dipl.-Ing. Bühler
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0115848A2 publication Critical patent/EP0115848A2/de
Publication of EP0115848A3 publication Critical patent/EP0115848A3/de
Application granted granted Critical
Publication of EP0115848B1 publication Critical patent/EP0115848B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C17/00—Moulding machines characterised by the mechanism for separating the pattern from the mould or for turning over the flask or the pattern plate

Definitions

  • the invention relates to a method according to the preamble of claim 1 and a device according to the preamble of claim 4.
  • a method and a device of this type are known from US-A 1 475 935.
  • the formation of a gap in the region of the model flanks with respect to the model plate cannot be avoided when the model is lifted from the shape produced.
  • the compressed air used to support the lifting of the model can escape through this gap, the speed of the escaping compressed air being very high with a small gap cross section, so that practically a sharp jet results.
  • the compressed air will drag molding sand away from the edges of the mold cavity. The consequence of this is that the castings produced later have considerable burrs in the area of the mold division, which have to be ground down in the casting cleaning shop, which can be very expensive.
  • the measures according to the invention ensure that the compressed air cannot escape from the gap-like space before it is relieved. Since, when the gap-shaped space is relieved, the pressurized air has already ended and, as a rule, a slow expansion of the compressed air enclosed in the space has already started, there is advantageously no longer-lasting, sharp outflow of the compressed air from the gap-shaped space, which is extremely gentle affects the shape edges.
  • a still further security with a simultaneous strong noise reduction can be achieved in an advantageous manner by the measures of claim 2.
  • the device-related solution to the above object consists in the characterizing measures of claim 4.
  • the gas-tight connection can be formed by the measure of claim 10. This advantageously results in a purely metallic type of sealing.
  • Another type of gas-tight seal is contained in claims 11 and 12.
  • the preferably inflatable elastomer seal used here ensures particularly high reliability.
  • the model plate carrier can expediently be divided by vertical dividing walls into at least two air chambers which can be acted upon with different pressures.
  • a central air chamber is advantageously provided underneath or, in the case of double-sided model plate supports, also above the models and is operatively connected to air passage openings in these.
  • This central air chamber is surrounded by a second air chamber which is operatively connected to air passage openings outside the model plate edge.
  • both air chambers can be connected in parallel or filled with air of different pressure or evacuated independently of one another. To fill the molding box with molding sand, for example, both chambers are suddenly placed under vacuum.
  • the outer air chamber can be connected to normal external pressure and the central air chamber can be pressurized with air of increased pressure.
  • the inner air chamber is expediently connected to an air chamber below or in the elastomer seal via an air line with a built-in differential pressure check valve. It is thereby achieved that with the increase in air pressure in the central air chamber, the elastomer seal is simultaneously inflated and pressed sealingly against the edge of the molding box. It follows it for a sufficiently long distance, and so far until the model and the mold have moved so far apart that a gap-shaped compressed air-filled space has formed between them.
  • the elastomer seal does not immediately return to its rest position , but only after a certain delay, because the check valve only opens the flow path to the central chamber when the pressure difference is slightly more than 1 bar. In this way, the undesired effect described above is eliminated.
  • the molded part of the vacuum molding machine which works according to the vacuum shooting principle with mechanical post-compression, consists of a hollow model plate carrier 1, which is divided by vertical partition walls 2 into a central air chamber 3 and an outer air chamber 4 surrounding it.
  • the upper and lower walls of the central air chamber 3 form an upper and lower model plate 5, 5 ', which are covered with the respective model halves 6, 6'.
  • the air chambers 3, 4 can be supplied with air or air 7, 8 respectively assigned to them via a valve circuit (not shown), both together and independently of one another, with vacuum or air, wherein different pressures can also be generated in the chambers.
  • Each air chamber is connected to the interior of an upper and lower mold box 10, 10 'via air passage openings 9, which are closed in a sand-tight manner by means of inserted filter nozzles or glued-on screen foils, which is vertically adjustable by means of a stripping cylinder (not shown).
  • the mold boxes are dimensioned so that their inner walls can slide a limited distance on the perpendicular outer walls of the model plate carrier 1 and a likewise vertically adjustable upper and lower shooting head 11, 11 'and thereby form a sufficiently airtight connection.
  • the shooting heads 11, 11 ' have shooting grates which can be closed after the shot has been fired and which act as a pressing grate for mechanical post-compression.
  • the outer edge of the model plate carrier 1 forms the compressed air-tight connection with the inner edge of the molding box 10, 10 'in the embodiment according to FIG. 1, in the embodiment according to FIGS. 2 and 3 there is an inflatable elastic seal 14 between the molding box 10 and the model plate carrier 1 provided.
  • the seal 14 is inserted into recesses in the model plate carrier 1, which in this case also acts as a molding box carrier, and is held by means of clamping strips 15. It has a Q-shaped cross section and its interior communicates with the central air chamber via air channels 16, 17 and a differential pressure check valve 18 inserted therein.
  • the compressed air supply is shut off with the aid of a sensor switch and the compressed air present in the system is decelerated by the outer air chamber 4 and air line 8 by a throttle valve (not shown).
  • the air cannot suddenly escape between the model plate carrier and the molding box edge, because the gap width of the space S in the exemplary embodiment according to FIG. 1 is smaller than the overlap length between the model plate carrier and the molding box.
  • the casting mold halves are then stripped to the height of the mold box edge on the mold division in the further course of the lifting process.
  • the gap S is bridged by the inflated seal 14, which is only vented again via the valve 18 when the air pressure in the central air chamber 3 is at least 1 bar lower than in the interior of the seal 14 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Devices For Molds (AREA)
EP84100992A 1983-02-08 1984-02-01 Verfahren und Vorrichtung zum Trennen eines Modells von einer Form Expired - Lifetime EP0115848B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3304148A DE3304148C1 (de) 1983-02-08 1983-02-08 Verfahren und Einrichtung zum druckluftunterstuetzten Abheben und Aussenken von Modellen aus Giessformen
DE3304148 1983-02-08

Publications (3)

Publication Number Publication Date
EP0115848A2 EP0115848A2 (de) 1984-08-15
EP0115848A3 EP0115848A3 (en) 1988-01-13
EP0115848B1 true EP0115848B1 (de) 1990-05-09

Family

ID=6190239

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84100992A Expired - Lifetime EP0115848B1 (de) 1983-02-08 1984-02-01 Verfahren und Vorrichtung zum Trennen eines Modells von einer Form

Country Status (4)

Country Link
US (1) US4593740A (enrdf_load_stackoverflow)
EP (1) EP0115848B1 (enrdf_load_stackoverflow)
JP (1) JPS59153547A (enrdf_load_stackoverflow)
DE (2) DE3304148C1 (enrdf_load_stackoverflow)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3507179C1 (de) * 1985-03-01 1985-10-31 Eugen Dipl.-Ing. 8877 Burtenbach Bühler Verfahren und Vorrichtung zur Herstellung von kastenlosen Giessformen
JPS6336950A (ja) * 1986-07-29 1988-02-17 オイゲン・ビ−ラ− 鋳型等の製造方法および装置
US4791974A (en) * 1987-05-18 1988-12-20 Dansk Industri Syndikat A/S Method and an apparatus for producing shaped bodies from particulate material
DE3717558C3 (de) * 1987-05-25 1997-04-03 Kuenkel Wagner Prozesstechnolo Verfahren zum Herstellen von Sandgießformen von Modellen
DE3813755A1 (de) * 1988-04-23 1989-11-02 Wagner Heinrich Sinto Masch Modelleinrichtung
DE3828436C1 (en) * 1988-08-22 1989-12-21 Eugen Dipl.-Ing. 8877 Burtenbach De Buehler Method for the impulse compaction of moulding sand
DE3916530C2 (de) * 1989-05-20 1996-11-07 Buehler Eisengieserei Gmbh Verfahren zur Herstellung von Gießformen durch Impulsverdichten
DE8912107U1 (de) * 1989-10-11 1990-10-25 Achinger, Michael, 8900 Augsburg Modelleinrichtung für Formstationen
US5853042A (en) * 1998-02-26 1998-12-29 Hunter Automated Machinery Corporation Drag mold release mechanism
US8377361B2 (en) * 2006-11-28 2013-02-19 Wei Zhang Imprint lithography with improved substrate/mold separation
US8747092B2 (en) 2010-01-22 2014-06-10 Nanonex Corporation Fast nanoimprinting apparatus using deformale mold
US10108086B2 (en) 2013-03-15 2018-10-23 Nanonex Corporation System and methods of mold/substrate separation for imprint lithography
WO2014145360A1 (en) 2013-03-15 2014-09-18 Nanonex Corporation Imprint lithography system and method for manufacturing
CN107624084A (zh) * 2016-05-17 2018-01-23 新东工业株式会社 脱箱造型机
US10835952B2 (en) 2017-10-20 2020-11-17 Hunter Foundry Machinery Corporation Method and apparatus for forming sand molds via top and bottom pneumatic sand filling perpendicular to the pattern plate

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE400266C (de) * 1922-10-02 1924-08-19 Wilfred Lewis Verfahren und Vorrichtung zur Erleichterung des Herausziehens von Modellen aus Sandformen
US1475935A (en) * 1922-10-02 1923-12-04 Tabor Mfg Co Method and apparatus for forming sand molds
GB611988A (en) * 1946-06-01 1948-11-05 Leonard Ogle Improvements in or relating to pattern plates for moulding machines
CH424097A (de) * 1962-03-23 1966-11-15 Hansberg Fritz Maschine zur Herstellung von Giessereiformen und Giessereikernen sowie sonstigen Formmasse-Formlingen unter Verwendung von Druckluft
GB1151237A (en) * 1966-07-20 1969-05-07 Barnett Levy Method for Removing Sand Cores and Pattern Shells from Core Boxes and Patterns
US3512756A (en) * 1967-09-05 1970-05-19 Dike O Seal Inc Pressurizable elastomeric thrusting device
CH492494A (de) * 1969-03-14 1970-06-30 Buehrer Erwin Verfahren zum Herstellen einer Giessereiform und Vorrichtung zur Durchführung des Verfahrens
JPS5242085Y2 (enrdf_load_stackoverflow) * 1974-01-24 1977-09-24
JPS5944420B2 (ja) * 1976-08-04 1984-10-29 遠州製作株式会社 織機における機掛け方法
NL7609734A (nl) * 1976-09-01 1978-03-03 Ihc Holland Nv Afdichting voor de losopening van een hopper of dergelijke onderlosser.
DE2653788C2 (de) * 1976-11-26 1981-08-27 Bühler, Eugen, Dipl.-Ing., 8871 Burtenbach Verfahren und Vorrichtung zum Herstellen von Gießformen aus bindemittelhaltigem Formsand
JPS6047031B2 (ja) * 1977-09-21 1985-10-19 新東工業株式会社 鋳型造型機
JPS5914032Y2 (ja) * 1979-05-28 1984-04-25 株式会社豊田自動織機製作所 鋳型造型装置

Also Published As

Publication number Publication date
US4593740A (en) 1986-06-10
EP0115848A2 (de) 1984-08-15
DE3482170D1 (de) 1990-06-13
EP0115848A3 (en) 1988-01-13
JPS59153547A (ja) 1984-09-01
JPS6338262B2 (enrdf_load_stackoverflow) 1988-07-29
DE3304148C1 (de) 1984-02-09

Similar Documents

Publication Publication Date Title
EP0115848B1 (de) Verfahren und Vorrichtung zum Trennen eines Modells von einer Form
DE2844464C2 (de) Verfahren und Vorrichtung zum Verdichten von Gießformen
DE2653788C2 (de) Verfahren und Vorrichtung zum Herstellen von Gießformen aus bindemittelhaltigem Formsand
DE3507179C1 (de) Verfahren und Vorrichtung zur Herstellung von kastenlosen Giessformen
DE3511283A1 (de) Verfahren und vorrichtung zum verdichten von giessereiformstoffen
DE4092542C2 (de) Verfahren zur Herstellung einer Reihe von Gießformen oder Formteilen und Vorrichtung zum Ausführen des Verfahrens
DE2842912C2 (de) Verfahren und Vorrichtung zum Herstellen von Sandgießformen o.dgl.
DE1300205B (de) Verfahren zum Umsetzen von Sandformen
DE3341959C1 (de) Vorrichtung zur Herstellung von Formlingen aus trockener,rieselfaehiger Formmasse,insbesondere keramischer Formmasse Stichwort:Kombiniertes Fuell-,Press- und Entnahmewerkzeug
EP0036434A1 (de) Verfahren und Vorrichtung zum Verdichten von Giessformen
DE3206169C1 (de) Formmaschine zur Herstellung kastenloser Formen
DE1941736B1 (de) Verfahren bei kastenlosen Formmaschinen zum Einschiessen des Formsandes und Maschine zur Durchfuehrung desselben
EP0650788A1 (de) Vorrichtung zum Verdichten von körnigen Formstoffen
DE60005065T2 (de) Verfahren und vorrichtung zur herstellung von kokillen oder kokillenteilen
DE4319078C2 (de) Verfahren und Formherstellungsmaschine zur Herstellung von Gußformen oder Gußformteilen aus Formsand
DE3339620C1 (de) Formanlage
CH662522A5 (de) Formmaschine zum herstellen von gasgehaerteten sandformen und verfahren zum betrieb dieser formmaschine.
DE3914160C1 (enrdf_load_stackoverflow)
DE2436657B2 (de) Vorrichtung zur herstellung von unterdruck-giessformen
DE3238802A1 (de) Vorrichtung zur herstellung von sandformen und sandkernen
DE2653648C3 (de) Formmodell für eine Unterdruckformvorrichtung und Verfahren zur Unterdruckformung einer Gießform
DE3916530C2 (de) Verfahren zur Herstellung von Gießformen durch Impulsverdichten
DE3877736T2 (de) Verfahren und vorrichtung zur herstellung von giessformen mit granuliertem material.
DE4023180C1 (en) Press forming machine - has venting opening in hood enclosing pressure plate, filling frame and moulded, to prevent air ingress
DE3623992C2 (enrdf_load_stackoverflow)

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

AK Designated contracting states

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

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

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

17P Request for examination filed

Effective date: 19880224

17Q First examination report despatched

Effective date: 19880810

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

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

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

Ref country code: SE

Effective date: 19900509

Ref country code: NL

Effective date: 19900509

Ref country code: GB

Effective date: 19900509

Ref country code: FR

Effective date: 19900509

Ref country code: BE

Effective date: 19900509

REF Corresponds to:

Ref document number: 3482170

Country of ref document: DE

Date of ref document: 19900613

ITF It: translation for a ep patent filed
EN Fr: translation not filed
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]
ITTA It: last paid annual fee
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
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19990114

Year of fee payment: 16

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19991227

Year of fee payment: 17

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

Ref country code: LI

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

Effective date: 20000229

Ref country code: CH

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

Effective date: 20000229

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: DE

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

Effective date: 20011201