EP0030059B1 - Procédé et dispositif d'automatisation d'un cycle de séchage sous air chaud de moules en sable - Google Patents

Procédé et dispositif d'automatisation d'un cycle de séchage sous air chaud de moules en sable Download PDF

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Publication number
EP0030059B1
EP0030059B1 EP80201113A EP80201113A EP0030059B1 EP 0030059 B1 EP0030059 B1 EP 0030059B1 EP 80201113 A EP80201113 A EP 80201113A EP 80201113 A EP80201113 A EP 80201113A EP 0030059 B1 EP0030059 B1 EP 0030059B1
Authority
EP
European Patent Office
Prior art keywords
automating
drying
concentration
air
mould
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
EP80201113A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0030059A1 (fr
Inventor
Pierre L. Merrien
Pierre A. Merrien
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.)
Etude Et Developpement En Metallurgie Edem So
Original Assignee
Edem Etude Dev & Metallurg
Etude Et Developpement En Metallurgie Edem A Responsabilite Dite Ltee Ste
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 Edem Etude Dev & Metallurg, Etude Et Developpement En Metallurgie Edem A Responsabilite Dite Ltee Ste filed Critical Edem Etude Dev & Metallurg
Priority to AT80201113T priority Critical patent/ATE9284T1/de
Publication of EP0030059A1 publication Critical patent/EP0030059A1/fr
Application granted granted Critical
Publication of EP0030059B1 publication Critical patent/EP0030059B1/fr
Expired 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

Definitions

  • the present invention relates to the regulation of heating by hot air of foundry molds for various alloys but particularly aluminum and intended to be cast at low pressure.
  • Heating is generally carried out in an oven for the cores and with a torch for the mussels.
  • the mold is then re-molded and closed before casting.
  • the torch heating is irregular, so as not to touch all the surfaces and in the time necessary for re-molding before casting, the volatile products can return to the imprint.
  • the metal is injected from bottom to top through the bottom surface of the mold which therefore has an orifice unlike gravity casting. Furthermore, the mold having no weights, has no opening at the top.
  • drying with hot air is regulated to carry out the minimum drying in time and intensity making it possible to ensure satisfactory conditions before casting under low pressure.
  • the method consists of a method and an application device.
  • the method is a decomposition of the drying operation into various phases assigned parameters and a regulation making it possible to obtain these parameters.
  • the invention is then characterized by the first claim.
  • the curve gives, as a function of time, the concentration of volatile organic matter in the air leaving the upper surface of the mold A in figure I.
  • phase II of decrease towards zero is replaced by a phase III of slow decrease of the concentration which constitutes a hold before pouring; drying is considered satisfactory at the end of phase I, as soon as it goes below the original value.
  • This low rate of decay to ensure maintenance before casting is introduced into a pilot to control an automated valve which controls the arrival of air into the mold.
  • the concentration at the origin C o is taken as zero in the system.
  • the pilot can receive his information from several dryers and regulate it like the first from the automated valves 8 1 ⁇ 8 2 ⁇ 8 3 etc., the outlets to the molds being all bypass on the central hot air duct 6.
  • MEMORY SET It can receive in speed values V 3 specific to different types of parts.
  • the drying curve is recorded and the curves obtained are compared with the reactions on the surface of the part detected in the form of microporosities in fluorescent penetrant testing.
  • the air temperature can for example be of the order of 150 ° C.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Drying Of Solid Materials (AREA)
  • Mold Materials And Core Materials (AREA)
  • Casting Devices For Molds (AREA)
  • Sampling And Sample Adjustment (AREA)
EP80201113A 1979-11-28 1980-11-19 Procédé et dispositif d'automatisation d'un cycle de séchage sous air chaud de moules en sable Expired EP0030059B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80201113T ATE9284T1 (de) 1979-11-28 1980-11-19 Verfahren und vorrichtung zum automatisieren eines trocknungszyklus mit luftzirkulation von sandgiessformen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7929227 1979-11-28
FR7929227A FR2470651A1 (fr) 1979-11-28 1979-11-28 Procede et dispositif d'automatisation d'un cycle de sechage sous air chaud de moules en sable

Publications (2)

Publication Number Publication Date
EP0030059A1 EP0030059A1 (fr) 1981-06-10
EP0030059B1 true EP0030059B1 (fr) 1984-09-12

Family

ID=9232159

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80201113A Expired EP0030059B1 (fr) 1979-11-28 1980-11-19 Procédé et dispositif d'automatisation d'un cycle de séchage sous air chaud de moules en sable

Country Status (9)

Country Link
US (3) US4573522A (https=)
EP (1) EP0030059B1 (https=)
JP (1) JPS56102349A (https=)
AT (1) ATE9284T1 (https=)
BR (1) BR8007811A (https=)
CA (1) CA1173539A (https=)
DE (1) DE3069180D1 (https=)
ES (1) ES497193A0 (https=)
FR (1) FR2470651A1 (https=)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE8202569L (sv) * 1982-04-30 1983-10-24 Proizv Ob Uralmash Forfarande och anordning for behandling av gjutformar
US5365995A (en) * 1993-12-27 1994-11-22 Ford Motor Company Method of curing hot box sand cores
US5368087A (en) * 1993-12-27 1994-11-29 Ford Motor Company Hot box core making apparatus
ES2143391B1 (es) * 1998-01-16 2000-12-16 Loramendi Sa Procedimiento de obtencion de piezas de metales no ferreos mediante colada en moldes de arena verde.
ES2156508B1 (es) * 1998-01-16 2002-02-01 Loramendi Sa "procedimiento de obtencion de piezas de metales no ferreos mediante colada en moldes de arena verde".
US6889745B2 (en) * 2002-09-10 2005-05-10 Metal Casting Technology, Incorporated Method of heating casting mold

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2643464A (en) * 1949-03-07 1953-06-30 American Instr Co Inc Automatic drying control system
US2867913A (en) * 1956-05-24 1959-01-13 Andrew J Faucher Apparatus for drying and humidifying materials
FR1177596A (fr) * 1956-06-27 1959-04-27 Fleissner & Sohn Maschf Dispositif de réglage du taux d'humidité final de matières traitées dans une installation de séchage
US3110573A (en) * 1958-05-14 1963-11-12 Buehler Ag Geb Control means and method in a drier for macaroni products
FR1546693A (fr) * 1967-10-09 1968-11-22 Four de déshydratation ou de séchage de produits d'origine végétale, à commandes, réglages et contrôles automatiques
CH549423A (de) * 1973-03-19 1974-05-31 Fischer Ag Georg Verfahren zur herstellung von formen und kernen fuer giessereizwecke.
JPS5377910U (https=) * 1976-12-01 1978-06-29
DE2655972C3 (de) * 1976-12-10 1980-03-06 Hoechst Ag, 6000 Frankfurt Verfahren zur gleichmäßigen Vortrocknung von textlien Warenbahnen
DE2727794A1 (de) * 1977-06-21 1979-01-18 Daimler Benz Ag Verfahren und einrichtung zum katalytischen aushaerten von kunstharzgebundenen sandformkoerpern
DE2921403A1 (de) * 1979-05-26 1980-11-27 Daimler Benz Ag Verfahren zum herstellen von thermisch aushaertbaren sandformkoerpern

Also Published As

Publication number Publication date
FR2470651A1 (fr) 1981-06-12
DE3069180D1 (en) 1984-10-18
JPH0223259B2 (https=) 1990-05-23
US4712601A (en) 1987-12-15
ATE9284T1 (de) 1984-09-15
CA1173539A (fr) 1984-08-28
EP0030059A1 (fr) 1981-06-10
JPS56102349A (en) 1981-08-15
US4573522A (en) 1986-03-04
ES8202705A1 (es) 1982-02-16
ES497193A0 (es) 1982-02-16
BR8007811A (pt) 1981-06-16
FR2470651B1 (https=) 1984-05-25
US4715427A (en) 1987-12-29

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