EP0332470B1 - Control of the temperature distribution of a mould and of cast or moulded parts produced thereby - Google Patents

Control of the temperature distribution of a mould and of cast or moulded parts produced thereby Download PDF

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Publication number
EP0332470B1
EP0332470B1 EP89302414A EP89302414A EP0332470B1 EP 0332470 B1 EP0332470 B1 EP 0332470B1 EP 89302414 A EP89302414 A EP 89302414A EP 89302414 A EP89302414 A EP 89302414A EP 0332470 B1 EP0332470 B1 EP 0332470B1
Authority
EP
European Patent Office
Prior art keywords
mould
areas
temperatures
air
heat carrier
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
EP89302414A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0332470A3 (en
EP0332470A2 (en
Inventor
Antonio Pinto Barbedo De Magalhaes
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.)
Felino- Fundicao E Construcoes Mecanicas Sa
OLIVA- Industrias Metalurgicas SA
Instituto de Engenharia Mecanica e Gestao Industrial INEGI
Original Assignee
Felino- Fundicao E Construcoes Mecanicas Sa
OLIVA- Industrias Metalurgicas SA
Instituto de Engenharia Mecanica e Gestao Industrial INEGI
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 Felino- Fundicao E Construcoes Mecanicas Sa, OLIVA- Industrias Metalurgicas SA, Instituto de Engenharia Mecanica e Gestao Industrial INEGI filed Critical Felino- Fundicao E Construcoes Mecanicas Sa
Priority to AT89302414T priority Critical patent/ATE96351T1/de
Publication of EP0332470A2 publication Critical patent/EP0332470A2/en
Publication of EP0332470A3 publication Critical patent/EP0332470A3/en
Application granted granted Critical
Publication of EP0332470B1 publication Critical patent/EP0332470B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/20—Accessories: Details
    • B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
    • B22D17/2218—Cooling or heating equipment for dies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/20—Accessories: Details
    • B22D17/32—Controlling equipment

Definitions

  • This invention relates to a permanent mould, such as a die casting mould and/or an injection mould, and to a process for controlling the temperature distribution in such a mould and in the parts cast or moulded thereby when it is used repetitively.
  • the life of a die, a permanent mould or a die casting mould and as well as the microstructure and the dimensional stability of a part cast or injected into it are dependent on the temperature distribution of the different points of the casting and mould.
  • dies are metallic and their cooling is achieved by water or other fluids circulating through cooling tubes or circuits bored inside them.
  • EP-A-0 286 977 expressly states that both the temperature detecting carriage and the sprayer carriage are preferably displaceable at a constant speed.
  • the search of the hotter surface areas is done very quickly and the cooling of them may be effected with a slow motion of the blowing system or even with this system stopped and pointing to the hotter points during the time necessary to cool them.
  • the present invention provides a process for controlling the temperature of a permanent mould, comprising scanning areas of the mould by means of at least one optical pyrometer in order to measure the temperatures of those areas, comparing the measured values of said temperatures with desired values, and directing heat carrier fluid streams at the said areas in order to reduce any difference between the measured and desired values, characterised in that the heat carrier fluid is air, the process steps being carried out immediately after the removal of the casting or moulding from the permanent mould.
  • the present invention provides a process for cooling and/or controlling the temperature distribution of a permanent mould, e.g. a die casting mould, and of a cast or injected part, using optical pyrometry in combination with the localized blowing of air (adjustable flows and adjustable amounts) so that the process may be optimized.
  • a permanent mould e.g. a die casting mould
  • optical pyrometry in combination with the localized blowing of air (adjustable flows and adjustable amounts) so that the process may be optimized.
  • an optical pyrometer or a plurality of optical pyrometers scan at convenient distances the different parts of a permanent mould immediately after the removal of the casting or moulding and measure the temperature of each area thereof and, if necessary, also the temperature of each point of the casting or moulding, e.g. a cluster of cast parts.
  • the measurements of the optical pyrometer(s) are converted into one or more electrical signals which are fed to an information processing system that treats them according to a predetermined program.
  • an information processing system that treats them according to a predetermined program.
  • one or more blowing systems are operated so that a controlled flow rate or flow rates of one or more cooling or heating air jets are impinged in controlled amounts against the area or the areas, the temperatures of which are being read or have just been read by the pyrometer(s).
  • the present invention provides a system which improves the life of a permanent die casting mould as it avoids its overheating or its excessively heterogeneous heating.
  • this process adjusts the temperature of each area of the permanent die casting mould so that a subsequent casting or injection run may be made and undue heterogeneity, warpings and/or any other defects of the die, caused by its heating, and of the castings, caused by the solidification process, may be avoided.
  • the process according to this invention can also be used whenever the produced castings or the injected parts have to be homogeneously cooled, for instance, when the direct austempering of cast iron after the casting is intended. The inventive process will control effectively the cooling of the cast parts.
  • the process according to this invention can be used together with the classical systems of temperature control of permanent moulds, including those having channels for the circulation of cooling (or heating and cooling) fluids, in order to reduce deviations in relation to the previewed or desired local temperatures. But the process can also be used alone, replacing the traditional cooling systems.
  • the process here disclosed also has the advantage that it can be used not only with metallic moulds, but also for the cooling of ceramic permanent moulds, and moulds made totally or partially of any porous and/or low heat conducting materials, eliminating the excess of heat by the side of the permanent moulds that is directly heated during the pouring or the injection casting, and preventing the absorption of water.
  • the fluid used is air, including mixtures with lubricants, anti-adherents, thermal insulating materials, and so on.
  • Such additives besides cooling the permanent moulds, may prepare them for the next pouring or injection casting operation, being deposited on the area against which the stream of fluid is directed.
  • This process of temperature control can be used in the die casting of cast irons, in the die and injection casting of aluminium and other alloys, and in the injection moulding of polymers and of other materials.
  • one or a plurality of optical pyrometers scan (at a certain distance) the surface of a die casting permanent mould, made of a metallic, ceramic composite, coated material, or any other, with or without cores, and, if necessary, scan also the cast or injected part and, depending on the temperatures read in each area, open or close more or less one or more valves of a blowing system, blowing one or more jets of air as a heat carrier, in controlled amounts, towards the areas that need to be cooled or heated, so that the temperatures become the desired ones, in order to improve the life of the permanent die casting moulds, including eventually cores, and in order also to guarantee good conditions for the subsequent casting or injection operation of the next piece in the same die, or in order also to reach the convenient temperatures in the die-cast or injection-moulded parts, for a subsequent heat treatment (aust

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Valve Housings (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
EP89302414A 1988-03-11 1989-03-10 Control of the temperature distribution of a mould and of cast or moulded parts produced thereby Expired - Lifetime EP0332470B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89302414T ATE96351T1 (de) 1988-03-11 1989-03-10 Regelung der temperaturverteilung in einer kokille und von darin gegossenen teilen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PT86954 1988-03-11
PT86954A PT86954B (pt) 1988-03-11 1988-03-11 Processo para controlar a distribuicao de temperaturas de moldacoes permanentes e de pecas vazadas ou injectadas nas referidas moldacoes ou coquilhas

Publications (3)

Publication Number Publication Date
EP0332470A2 EP0332470A2 (en) 1989-09-13
EP0332470A3 EP0332470A3 (en) 1990-10-10
EP0332470B1 true EP0332470B1 (en) 1993-10-27

Family

ID=20084188

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89302414A Expired - Lifetime EP0332470B1 (en) 1988-03-11 1989-03-10 Control of the temperature distribution of a mould and of cast or moulded parts produced thereby

Country Status (4)

Country Link
EP (1) EP0332470B1 (pt)
AT (1) ATE96351T1 (pt)
DE (1) DE68910156D1 (pt)
PT (1) PT86954B (pt)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009106689A1 (en) * 2008-02-29 2009-09-03 Outotec Oyj Method and equipment for casting anodes
DE202011003399U1 (de) 2011-03-01 2012-06-04 BEGO Bremer Goldschlägerei Wilh. Herbst GmbH & Co. KG Vakuumgießgerät

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19810032A1 (de) * 1998-03-09 1999-09-16 Acheson Ind Inc Verfahren und Vorrichtung zum Vorbereiten der Formwandungen einer Form zur Urformung bzw. Umformung auf den nächstfolgenden Formungszyklus, Sprühelement mit Zentrifugalzerstäubung und Luftführung und Verwendung eines derartigen Sprühelements zum Versprühen im wesentlichen lösungsmittelfreien Formwandbehandlungsmittels

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3506060A (en) * 1966-05-06 1970-04-14 Robert S L Andrews Method for continuous centrifugal casting of tubular metal articles
FR2085409B1 (pt) * 1970-04-17 1973-08-10 Pont A Mousson
JPS57171565A (en) * 1981-04-13 1982-10-22 Hitachi Metals Ltd Cooling method for die
IT1208277B (it) * 1987-04-15 1989-06-12 Italimpianti Apparecchiatura e metodo per il controllo del raffreddamento delle forme utilizzate per la colata sotto pressione controllata deimetalli

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009106689A1 (en) * 2008-02-29 2009-09-03 Outotec Oyj Method and equipment for casting anodes
DE202011003399U1 (de) 2011-03-01 2012-06-04 BEGO Bremer Goldschlägerei Wilh. Herbst GmbH & Co. KG Vakuumgießgerät
DE102012202808A1 (de) 2011-03-01 2012-09-06 BEGO Bremer Goldschlägerei Wilh. Herbst GmbH & Co. KG Vakuumgießgerät

Also Published As

Publication number Publication date
PT86954B (pt) 1994-07-29
ATE96351T1 (de) 1993-11-15
EP0332470A3 (en) 1990-10-10
EP0332470A2 (en) 1989-09-13
PT86954A (pt) 1990-03-30
DE68910156D1 (de) 1993-12-02

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