EP0168635A2 - Dispositif pour durcir les noyaux et/ou les moules en sable avec un liant durcissable - Google Patents

Dispositif pour durcir les noyaux et/ou les moules en sable avec un liant durcissable Download PDF

Info

Publication number
EP0168635A2
EP0168635A2 EP85107249A EP85107249A EP0168635A2 EP 0168635 A2 EP0168635 A2 EP 0168635A2 EP 85107249 A EP85107249 A EP 85107249A EP 85107249 A EP85107249 A EP 85107249A EP 0168635 A2 EP0168635 A2 EP 0168635A2
Authority
EP
European Patent Office
Prior art keywords
compressed air
control valve
controlled
control
valve
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
EP85107249A
Other languages
German (de)
English (en)
Other versions
EP0168635B1 (fr
EP0168635A3 (en
Inventor
Horst Werner Dipl.-Ing. Michel
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
Priority to AT85107249T priority Critical patent/ATE57320T1/de
Publication of EP0168635A2 publication Critical patent/EP0168635A2/fr
Publication of EP0168635A3 publication Critical patent/EP0168635A3/de
Application granted granted Critical
Publication of EP0168635B1 publication Critical patent/EP0168635B1/fr
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
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/12—Treating moulds or cores, e.g. drying, hardening
    • B22C9/123—Gas-hardening

Definitions

  • the invention relates to a device for curing cores and / or molds made from sand with the addition of curable binders, which are used for casting molded articles from flowable compositions, a predetermined amount of the substance causing the curing of the binder being controlled by metering devices controlled by control valves With the aid of compressed air which can be regulated through its flow through a control valve, by mixing this substance with this compressed air into the core or the mold, and the control valve is controlled automatically according to a predetermined schedule.
  • DE-OS 28 33 305.3 describes an electro-pneumatic control with which it is possible to generate a predetermined schedule for feeding the compressed air into a device in which a line for a liquid catalyst leads to a mixing chamber and one Heater and controlled valves are provided which control the entry of the compressed air and the entry of the catalyst to the mixing chamber in time with the work processes, the heating device being connected upstream of the mixing chamber and a further shut-off valve being provided between the mixing chamber and the core or mold.
  • the schedule for the workflow is divided into a cycle time and a break time.
  • the compressed air fed in has a certain pressure value, for example 2 bar, which is controlled by a valve arrangement and can increase to, for example, 6 bar in the course of the cycle time.
  • the gasified catalyst is located under the initial pressure of the compressed air in the mixing area, which is composed of the heating device and a mixing chamber. This catalyst is driven out by the supply of compressed air and finally reaches a proportion of zero in the mixing chamber.
  • the so-called hardening time lasts from the beginning to the point in time when the catalyst in the mixing chamber has finally reached the proportion of zero.
  • a rinsing process follows. The purge is done with pure compressed air.
  • the system is closed off from the compressed air source, so that the pressure of the compressed air can now relax completely and finally reaches a normal value corresponding to the external pressure. This completes the cycle time and a pause time of any length begins.
  • the suction pump for the liquid catalyst has started to work and works until a point is reached which is different from that Amount of the catalyst to be sucked is dependent.
  • the known device works by electro-pneumatic means, which means that a number of mechanical components and in particular valves must be available.
  • the valves in particular wear out and can thus become defective.
  • the object of the invention is to provide a device which manages with considerably fewer components and in particular allows the required control to be simplified considerably.
  • control valve is controlled by means of a proportional pressure control valve which can be actuated by an external control which also controls the other control valves.
  • control valve is controlled via a presettable pressure control valve and an electrically or pneumatically controlled directional valve.
  • a particular advantage of the device according to the invention and that in both embodiments is that several dosing cycles can be obtained during the workflow, ie the time during which the compressed air is running. This results in the possibility of an exact adjustment of the dosage to the size of the workpiece.
  • the metered quantity can now be multiplied as often as required, which is possible by simply installing an additional valve which can also be controlled by the control system.
  • flowable mass is to be understood as meaning masses from which a shaped body can be produced in a mold, it being irrelevant whether the production is made from a mass heated to the melt or from a mass produced by adding liquid to a powdery substance Sludge or the like. Or a mass fluidized in some other way.
  • sand is understood to mean all powdery to granular substances suitable for the production of molds and / or cores, which can be compacted by means of a hardenable binder.
  • Fig. 1 the connection to a compressed air source is designated at 1, which is, for example, under a pressure of 6 bar.
  • a water, ul and dirt separator can be seen, which ensures that the system is only supplied with clean compressed air.
  • the incoming compressed air arrives at the control valve 3, which is controlled by the proportional pressure control valve 4.
  • the control valve 3 the control of which is indicated schematically in FIG. 3a
  • the compressed air passes via a measuring device 5 and a safety check valve 6 to the heating block 7, which is penetrated by labyrinth channels guiding the compressed air and preferably consists of aluminum.
  • Heating resistors are cast into this heating block 7, the connections of which are indicated at 8.
  • 9 means a temperature measuring device, for example in the form of a resistance thermometer.
  • the line 10 leads directly in the direction of the arrow to the mold.
  • the substance curing the binder in the sand in the mold e.g. B. a catalyst is removed from a reservoir 11 via a check valve 12 with the aid of a metering pump 13. With 14 a pressure measuring device for indicating the pressure of this substance is designated.
  • the substance passes from the metering pump 13 via a valve arrangement 15 and a mixing chamber 16 and via line 17 into the heating block 7 and is conveyed from it via line 10 to the molding tool in the corresponding working cycle.
  • the arrangement of the throttle valve 18 and the actuating valve 19 serves for the corresponding clocking and the on position of the suction speed.
  • a directional control valve is provided, via which an air flow is led into the mixing chamber 16, which atomizes the substance coming from the metering pump 13 and carries it via line 17 into the heating block 7.
  • FIG. 2 the parts in FIG. 1 have the same parts with the same reference numerals, so that their detailed description is no longer required.
  • the proportional pressure control valve 4, which is shown in FIG. 1, is replaced in the embodiment according to FIG. 2 by a pressure control valve 41, which can be preset by hand and acts on the control valve 3 via an electrically or pneumatically controlled directional valve 42.
  • the control of this directional control valve 42 can itself be contained in this directional control valve 42 if it can be controlled practically without friction from unpressurized to the final value.
  • the directional control valve 42 is controlled by an electro-pneumatic directional control valve 43 or directly by a pneumatic control, which is not shown but is known per se.
  • the actuating valve 19 of the metering pump 13 is also influenced by a manually adjustable pressure regulator 191 and thus enables the metered quantity to be reproduced.
  • the directional control valve 20 of the embodiment according to FIG. 1 can be saved because the compressed air line to the heating block 7 is led directly via the mixing chamber 16.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Devices For Molds (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Mold Materials And Core Materials (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
EP85107249A 1984-06-19 1985-06-12 Dispositif pour durcir les noyaux et/ou les moules en sable avec un liant durcissable Expired - Lifetime EP0168635B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85107249T ATE57320T1 (de) 1984-06-19 1985-06-12 Einrichtung zum aushaerten von aus sand unter beigabe von aushaertbaren bindemitteln hergestellten kernen und/oder formen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843422742 DE3422742A1 (de) 1984-06-19 1984-06-19 Steuerung fuer eine vorrichtung zum aushaerten von sandkernen und/oder -formen
DE3422742 1984-06-19

Publications (3)

Publication Number Publication Date
EP0168635A2 true EP0168635A2 (fr) 1986-01-22
EP0168635A3 EP0168635A3 (en) 1988-01-20
EP0168635B1 EP0168635B1 (fr) 1990-10-10

Family

ID=6238725

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85107249A Expired - Lifetime EP0168635B1 (fr) 1984-06-19 1985-06-12 Dispositif pour durcir les noyaux et/ou les moules en sable avec un liant durcissable

Country Status (4)

Country Link
US (1) US4644994A (fr)
EP (1) EP0168635B1 (fr)
AT (1) ATE57320T1 (fr)
DE (2) DE3422742A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0881014A1 (fr) * 1997-05-27 1998-12-02 Lüber GmbH Dispositif pour durcir les noyaux en sable

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5135043A (en) * 1990-06-25 1992-08-04 Omco Usa, Inc. Apparatus and method for gas curing foundry cores and molds
GB2333985A (en) * 1998-02-10 1999-08-11 Dean Anthony Jones Casting core production
US6505671B1 (en) * 2000-12-28 2003-01-14 Hayes Lemmerz International, Inc. Method for producing a sand core
CH698743B1 (de) * 2006-04-24 2009-10-15 Lueber Gmbh Verfahren und Einrichtung zum Aushärten von anorganischen Giesserei-Kernen und -Formen.

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3937272A (en) * 1973-10-29 1976-02-10 Sutter Products Company Cold set catalyst supply and fume incinerator for a foundry core making machine
DE2621153A1 (de) * 1976-05-13 1977-11-24 Daimler Benz Ag Verfahren und einrichtung zum aushaerten von sandformkoerpern
DE2704868A1 (de) * 1977-02-05 1978-08-10 Michel Horst Werner Ing Grad Verfahren und vorrichtung zur kernherstellung fuer giessereizwecke
FR2431886A1 (fr) * 1978-07-28 1980-02-22 Michel Horst Werner Procede et dispositif pour durcir les noyaux et/ou moules en sable destines a la coulee des pieces de fonderie
DE3135510A1 (de) * 1981-09-08 1983-03-24 Horst-Werner Ing.(Grad.) 7707 Engen Michel Einrichtung zum aushaerten von aus sand unter beigabe von aushaertbaren bindemitteln hergestellten kernen und/oder formen

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1269202A (en) * 1968-02-14 1972-04-06 Fordath Ltd Improvements in the production of cores for use in the production of metal castings
DE2162137C2 (de) * 1971-12-15 1983-01-13 Horst-Werner Ing.(Grad.) 7707 Engen Michel Anlage zum Aushärten von Sandformen und -kernen für Gießereizwecke
US4105725A (en) * 1972-11-21 1978-08-08 Liquid Carbonic Canada Ltd. Saturated liquid/vapor generating and dispensing
DE2413537C2 (de) * 1974-03-21 1984-11-15 Horst-Werner Ing.(Grad.) 7707 Engen Michel Vorrichtung zum Herstellen von Kernen für Gießereizwecke
DE2833305A1 (de) * 1978-07-28 1980-02-07 Michel Horst Werner Ing Grad Verfahren und vorrichtung zum aushaerten von aus sand hergestellten kernen und/oder formen, die zum giessen von formkoerpern aus metall verwendung finden
US4359082A (en) * 1979-07-28 1982-11-16 Michel Horst Werner Method and apparatus for hardening mold parts made of sand for making metal castings
US4483384A (en) * 1980-06-02 1984-11-20 Michel Horst Werner Apparatus for hardening mold parts made of sand for making metal castings

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3937272A (en) * 1973-10-29 1976-02-10 Sutter Products Company Cold set catalyst supply and fume incinerator for a foundry core making machine
DE2621153A1 (de) * 1976-05-13 1977-11-24 Daimler Benz Ag Verfahren und einrichtung zum aushaerten von sandformkoerpern
DE2704868A1 (de) * 1977-02-05 1978-08-10 Michel Horst Werner Ing Grad Verfahren und vorrichtung zur kernherstellung fuer giessereizwecke
FR2431886A1 (fr) * 1978-07-28 1980-02-22 Michel Horst Werner Procede et dispositif pour durcir les noyaux et/ou moules en sable destines a la coulee des pieces de fonderie
DE3135510A1 (de) * 1981-09-08 1983-03-24 Horst-Werner Ing.(Grad.) 7707 Engen Michel Einrichtung zum aushaerten von aus sand unter beigabe von aushaertbaren bindemitteln hergestellten kernen und/oder formen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0881014A1 (fr) * 1997-05-27 1998-12-02 Lüber GmbH Dispositif pour durcir les noyaux en sable

Also Published As

Publication number Publication date
ATE57320T1 (de) 1990-10-15
EP0168635B1 (fr) 1990-10-10
US4644994A (en) 1987-02-24
DE3580065D1 (de) 1990-11-15
EP0168635A3 (en) 1988-01-20
DE3422742C2 (fr) 1987-07-16
DE3422742A1 (de) 1985-12-19

Similar Documents

Publication Publication Date Title
DE2748982C2 (de) Anordnung zum Füllen von Gießformen mit Gießharz od.dgl. gießfähig flüssigen Medien
EP0135798B1 (fr) Buse multiple pour réunir au moins deux réactants fluides pour produire un mélange réactionnel fluide formant, par réaction, de la matière plastique, en particulier de la matière plastique alvéolaire
CH642904A5 (de) Verfahren zur steuerung von duesenverschluessen in einer spritzgiessvorrichtung.
DE4210687C2 (de) Vorrichtung für die Abgabe zähflüssiger, aushärtender Stoffe, sowie Verfahren zum Betrieb einer derartigen Vorrichtung
EP0009118B2 (fr) Procédé et dispositif pour la fabrication d'articles en matériau chimique contenant une matière de charge
DE2652767C2 (de) Verwendung eines, das Ansetzen von Formmassen für Gießereiformen verhindernden Mittels
EP0438084B1 (fr) Pompe à béton pour la projection humide
EP0168635B1 (fr) Dispositif pour durcir les noyaux et/ou les moules en sable avec un liant durcissable
DE2833305A1 (de) Verfahren und vorrichtung zum aushaerten von aus sand hergestellten kernen und/oder formen, die zum giessen von formkoerpern aus metall verwendung finden
EP0644025A1 (fr) Procédé pour mélanger des composants et dispositif de mise en oeuvre du procédé
EP0310802B1 (fr) Procédé et dispositif pour la fabrication de noyaux et moules de fonderie en sable, utilisant un liant
DE2933869C2 (de) Verfahren und Vorrichtung zum Herstellen eines unteren Formteils
DE2419975C3 (de) Hydraulische Steuervorrichtung für eine Einspritzeinheit einer Kunststoff-Spritzgießmaschine zum Steuern unterschiedlicher Hydraulikdrücke
EP0313916B1 (fr) Appareil pour produire des objets en un mélange réactif coulant, consistant en composantes réactives coulantes et réagissant pour former une matière plastique, notamment une matière plastique moussée
DE4320848A1 (de) Vorrichtung für die Abgabe zähflüssiger, aushärtender Stoffe
DE3803419A1 (de) Vorrichtung fuer die dosierte abgabe von mehreren teilmengen zaehfluessiger stoffe, wie giessharz
WO2003106072A1 (fr) Procede et dispositif pour faire durcir des noyaux de coulee
DE2407474C2 (de) Verfahren und Mischer zum Aufbereiten von Formsand
EP2848332B1 (fr) Dispositif et procédé pour durcir des noyaux de fonderie
DE3340762C2 (de) Verfahren und Vorrichtung zum Aushärten von aus Sand unter Verwendung eines Bindemittels hergestellten Kernen und/oder Formen, die zum Gießen von Formkörpern aus metallischen oder nicht metallischen schmelzflüssigen Ausgangsmaterialien Verwendung finden
DE3611914A1 (de) Dosiereinrichtung
DE2651144B2 (de) Verfahren zur Herstellung von Formschalen aus thermohärtbaren flüssigen Massen und Vorrichtung zur Durchführung des Verfahrens
DE4245074B4 (de) Vorrichtung für die Abgabe zähflüssiger, aushärtender Stoffe, sowie Verfahren zum Betrieb einer derartigen Vorrichtung
DE3023949A1 (de) Verfahren und vorrichtung zum herstellen von kernen und formen fuer giessereizwecke
DE9309352U1 (de) Vorrichtung für die Abgabe zähflüssiger, aushärtender Stoffe

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): AT BE CH DE FR GB IT LI NL

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

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

17P Request for examination filed

Effective date: 19880714

17Q First examination report despatched

Effective date: 19890705

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

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

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

Ref country code: NL

Effective date: 19901010

Ref country code: BE

Effective date: 19901010

REF Corresponds to:

Ref document number: 57320

Country of ref document: AT

Date of ref document: 19901015

Kind code of ref document: T

REF Corresponds to:

Ref document number: 3580065

Country of ref document: DE

Date of ref document: 19901115

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
ITF It: translation for a ep patent filed
ET Fr: translation filed
NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
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: GB

Payment date: 19940520

Year of fee payment: 10

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

Ref country code: FR

Payment date: 19940610

Year of fee payment: 10

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

Ref country code: CH

Payment date: 19940617

Year of fee payment: 10

Ref country code: AT

Payment date: 19940617

Year of fee payment: 10

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

Ref country code: DE

Payment date: 19940721

Year of fee payment: 10

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

Ref country code: GB

Effective date: 19950612

Ref country code: AT

Effective date: 19950612

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

Ref country code: LI

Effective date: 19950630

Ref country code: CH

Effective date: 19950630

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19950612

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

Ref country code: FR

Effective date: 19960229

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

Effective date: 19960301

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST