EP0115848A2 - Procédé et dispositif pour séparer un modèle d'un moule - Google Patents

Procédé et dispositif pour séparer un modèle d'un moule Download PDF

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Publication number
EP0115848A2
EP0115848A2 EP84100992A EP84100992A EP0115848A2 EP 0115848 A2 EP0115848 A2 EP 0115848A2 EP 84100992 A EP84100992 A EP 84100992A EP 84100992 A EP84100992 A EP 84100992A EP 0115848 A2 EP0115848 A2 EP 0115848A2
Authority
EP
European Patent Office
Prior art keywords
model
molding
compressed air
gap
mold
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
EP84100992A
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German (de)
English (en)
Other versions
EP0115848A3 (en
EP0115848B1 (fr
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
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0115848A2 publication Critical patent/EP0115848A2/fr
Publication of EP0115848A3 publication Critical patent/EP0115848A3/de
Application granted granted Critical
Publication of EP0115848B1 publication Critical patent/EP0115848B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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 for separating a model from a mold made of compressed, preferably binder-containing molding material by mutual relative movement, compressed air being directed against the model-side molding material surface to support the detachment of the model from the mold, and goes according to a further inventive concept to an apparatus for performing this method.
  • a preferred, but not exclusive, field of application is the production of casting molds from binding clay or similar molding sand on pneumatically and / or mechanically compacting molding machines, wherein the casting mold can contain a model sand layer made of a molding material with a thermosetting binder.
  • the solution relating to the device is characterized in that the model device and the molding device interact in a gas-tight manner in the region of their mutually facing edge, at least in the region of part of their mutual stroke, and in that the model plate and / or the model of the model device is provided with air passage openings.
  • the gas-tight connection can be of a purely metallic nature and can be formed, for example, by the interaction of the model plate edge with the mold box wall. However, it can also comprise a preferably inflatable elastomer seal between the edge of the molding box and the model plate or molding box support.
  • the model plate carrier can be divided appropriately by vertical partition walls into at least two air chambers that can be acted upon with different pressures.
  • a central air chamber is advantageously provided below or, in the case of model plate supports coated on both sides, 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 the air pressure in the central air chamber, the elastomer seal is simultaneously inflated and pressed against the edge of the molding box in a sealing manner. 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 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 acted upon via air lines 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.
  • Every air came Mer is via air passage openings 9, which are closed in a sand-tight manner by means of inserted filter nozzles or glued-on screen foils, with the interior of an upper and lower molding box 10, 10 ', 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 an ⁇ -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 feeler 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 Procédé et dispositif pour séparer un modèle d'un moule Expired - Lifetime EP0115848B1 (fr)

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 true EP0115848A2 (fr) 1984-08-15
EP0115848A3 EP0115848A3 (en) 1988-01-13
EP0115848B1 EP0115848B1 (fr) 1990-05-09

Family

ID=6190239

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84100992A Expired - Lifetime EP0115848B1 (fr) 1983-02-08 1984-02-01 Procédé et dispositif pour séparer un modèle d'un moule

Country Status (4)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8912107U1 (de) * 1989-10-11 1990-10-25 Achinger, Michael, 8900 Augsburg Modelleinrichtung für Formstationen

Families Citing this family (14)

* 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
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
WO2014145826A2 (fr) 2013-03-15 2014-09-18 Nanonex Corporation Système et procédés de séparation moule/substrat pour lithographie par impression
US10105883B2 (en) 2013-03-15 2018-10-23 Nanonex Corporation Imprint lithography system and method for manufacturing
US20190151934A1 (en) * 2016-05-17 2019-05-23 Sintokogio, Ltd. Flaskless molding machine
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 (fr) * 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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8912107U1 (de) * 1989-10-11 1990-10-25 Achinger, Michael, 8900 Augsburg Modelleinrichtung für Formstationen

Also Published As

Publication number Publication date
US4593740A (en) 1986-06-10
EP0115848A3 (en) 1988-01-13
DE3482170D1 (de) 1990-06-13
EP0115848B1 (fr) 1990-05-09
JPS6338262B2 (fr) 1988-07-29
JPS59153547A (ja) 1984-09-01
DE3304148C1 (de) 1984-02-09

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