EP0229959A1 - Einrichtung zum Aushärten von Giesserei-Kernen - Google Patents

Einrichtung zum Aushärten von Giesserei-Kernen Download PDF

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Publication number
EP0229959A1
EP0229959A1 EP86116968A EP86116968A EP0229959A1 EP 0229959 A1 EP0229959 A1 EP 0229959A1 EP 86116968 A EP86116968 A EP 86116968A EP 86116968 A EP86116968 A EP 86116968A EP 0229959 A1 EP0229959 A1 EP 0229959A1
Authority
EP
European Patent Office
Prior art keywords
carrier gas
catalyst
hardening
core
metering
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Withdrawn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
EP86116968A
Other languages
German (de)
English (en)
French (fr)
Inventor
Werner Lüber
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 EP0229959A1 publication Critical patent/EP0229959A1/de
Withdrawn legal-status Critical Current

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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 present invention relates to a device for hardening foundry cores from a mixture containing sand and binder, in which the core or the like is exposed to a carrier gas stream with a chemical reactant in a liquid or gaseous state and subsequently to a flushing gas stream for hardening in a core form is, wherein a metering device is arranged at least between the storage container for the chemical reactant and the pressure container for the carrier gas-reactant mixture.
  • a molding material in which, in addition to the hardener component diisocyanate, triethylamine is used as the catalyst for curing a synthetic resin binder.
  • the catalyst is introduced in the form of a mist using compressed air and / or nitrogen into the molding tool filled with molding material and evaporates immediately.
  • triethylamine is several times heavier than air as a vapor. This vapor is very odor-intensive and, even at low concentrations, irritates the moisture-wetted mucous membranes of the eyes, mouth and throat considerably.
  • General poisoning can be caused by absorption of the triethylamine vapors via the oral mucosa into the gastrointestinal tract.
  • the devices of the aforementioned type were equipped with pre-metering and high-pressure units in order to introduce the smallest catalyst components into the core abruptly.
  • a particular disadvantage here is that the dosage cannot be varied easily.
  • the object of the present invention is therefore to provide a device for curing foundry cores which, regardless of the curing process used, enables a selectable and precise metering of the catalyst or reaction agent or catalyst / carrier gas mixture which is practically uninfluenced by aggressive chemical reactants.
  • the metering device for the chemical reactant is a flow meter with a float arranged in a measuring tube.
  • Flow meters with a float arranged in a measuring tube are, in particular, well-proven units in chemistry, the measuring tube of which is made of Duran 50, for example, and the float made of stainless steel or glass are practically resistant to all chemical reactants.
  • the flow meters allow any flow of liquid or gas to be set, measured and kept constant.
  • Such flow meters are also commercially available.
  • the device shown for hardening a foundry core in a core mold 8 includes i.a. and in a manner known per se, a pressure vessel 1 for the production and reception of the gaseous catalyst mixture.
  • this pressure vessel 1 has a nebulizing nozzle 2, which is in flow connection via a first controllable solenoid valve 4 or the like with a storage vessel 3 for a methyl formate suitable as a catalyst.
  • the methyl formate is preferably conveyed via an upstream pressure-variable feed pump 3 '.
  • Another input 22 of the pressure vessel 1 is in flow connection with a compressed air source 6 via a further controllable valve 5.
  • the outlet 7 of the pressure vessel 1, however, is in flow connection with the core mold 8.
  • the arrangement is such that one valve 4 blocks the passage of the methyl formate into the pressure vessel 1 when flushing with air.
  • a flow meter 10 with a float 12 arranged in a measuring tube 11 is now switched on for at least the metering of the catalyst from the storage container 3 between the latter or the feed pump 3 'and the pressure container 1 or the valve 4 in front of its inlet 21.
  • such a flow meter can also be switched on in the pressure line for the carrier gas or the purge air.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
EP86116968A 1985-12-19 1986-12-06 Einrichtung zum Aushärten von Giesserei-Kernen Withdrawn EP0229959A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH542985A CH670405A5 (enrdf_load_stackoverflow) 1985-12-19 1985-12-19
CH5429/85 1985-12-19

Publications (1)

Publication Number Publication Date
EP0229959A1 true EP0229959A1 (de) 1987-07-29

Family

ID=4293439

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86116968A Withdrawn EP0229959A1 (de) 1985-12-19 1986-12-06 Einrichtung zum Aushärten von Giesserei-Kernen

Country Status (2)

Country Link
EP (1) EP0229959A1 (enrdf_load_stackoverflow)
CH (1) CH670405A5 (enrdf_load_stackoverflow)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991001189A1 (de) * 1989-07-14 1991-02-07 Lueber Werner Verfahren und einrichtung zum aushärten von giesserei-kernen
EP0881014A1 (de) * 1997-05-27 1998-12-02 Lüber GmbH Einrichtung zum Aushärten von Giesserei-Kernen
WO2003106072A1 (de) * 2002-06-17 2003-12-24 Lüber GmbH Verfahren und einrichtung zum aushärten von giesserei-kernen
CN103521708A (zh) * 2013-08-16 2014-01-22 苏州明志科技有限公司 用于冷芯机的气体发生器催化剂定量控制方法及装置
EP2848332A1 (de) 2013-09-11 2015-03-18 Lüber GmbH Einrichtung und Verfahren zum Aushärten von Giesserei-Kernen
WO2020043714A1 (de) * 2018-08-28 2020-03-05 Fritz Winter Eisengiesserei Gmbh & Co. Kg VERFAHREN ZUR BEGASUNG VON FÜR DIE HERSTELLUNG VON GIEßKERNEN IN EINEN KERNKASTEN EINGESCHOSSENEM FORMSTOFF MIT EINEM KATALYSATORGAS

Citations (3)

* 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
US4132260A (en) * 1975-10-02 1979-01-02 Werner Luber Method and apparatus for hardening of foundry cores
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

Patent Citations (3)

* 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
US4132260A (en) * 1975-10-02 1979-01-02 Werner Luber Method and apparatus for hardening of foundry cores
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

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991001189A1 (de) * 1989-07-14 1991-02-07 Lueber Werner Verfahren und einrichtung zum aushärten von giesserei-kernen
EP0881014A1 (de) * 1997-05-27 1998-12-02 Lüber GmbH Einrichtung zum Aushärten von Giesserei-Kernen
WO2003106072A1 (de) * 2002-06-17 2003-12-24 Lüber GmbH Verfahren und einrichtung zum aushärten von giesserei-kernen
EP1375031A1 (de) * 2002-06-17 2004-01-02 Lüber GmbH Verfahren und Einrichtung zum Aushärten von Giesserei-Kernen
CN103521708A (zh) * 2013-08-16 2014-01-22 苏州明志科技有限公司 用于冷芯机的气体发生器催化剂定量控制方法及装置
EP2848332A1 (de) 2013-09-11 2015-03-18 Lüber GmbH Einrichtung und Verfahren zum Aushärten von Giesserei-Kernen
WO2020043714A1 (de) * 2018-08-28 2020-03-05 Fritz Winter Eisengiesserei Gmbh & Co. Kg VERFAHREN ZUR BEGASUNG VON FÜR DIE HERSTELLUNG VON GIEßKERNEN IN EINEN KERNKASTEN EINGESCHOSSENEM FORMSTOFF MIT EINEM KATALYSATORGAS

Also Published As

Publication number Publication date
CH670405A5 (enrdf_load_stackoverflow) 1989-06-15

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