GB1357580A - Vacuum furnaces - Google Patents

Vacuum furnaces

Info

Publication number
GB1357580A
GB1357580A GB4957071A GB4957071A GB1357580A GB 1357580 A GB1357580 A GB 1357580A GB 4957071 A GB4957071 A GB 4957071A GB 4957071 A GB4957071 A GB 4957071A GB 1357580 A GB1357580 A GB 1357580A
Authority
GB
United Kingdom
Prior art keywords
furnace
regulator
pressure
regulators
vacuum
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
GB4957071A
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.)
ABB Norden Holding AB
Original Assignee
ASEA AB
Allmanna Svenska Elektriska AB
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 ASEA AB, Allmanna Svenska Elektriska AB filed Critical ASEA AB
Publication of GB1357580A publication Critical patent/GB1357580A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/10—Sintering only
    • B22F3/1003—Use of special medium during sintering, e.g. sintering aid
    • B22F3/1007—Atmosphere
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/10—Sintering only
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
    • C04B35/56—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D16/00—Control of fluid pressure
    • G05D16/20—Control of fluid pressure characterised by the use of electric means
    • G05D16/2006—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means
    • G05D16/2013—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means
    • G05D16/202—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means actuated by an electric motor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2201/00—Treatment under specific atmosphere
    • B22F2201/20—Use of vacuum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2203/00—Controlling
    • B22F2203/03—Controlling for feed-back

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Ceramic Engineering (AREA)
  • Automation & Control Theory (AREA)
  • General Physics & Mathematics (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Furnace Details (AREA)
  • Powder Metallurgy (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)

Abstract

1357580 Automatic control ALLMANNA SVENSKA ELEKTRISKA A B 26 Oct 1971 [27 Oct 1970] 49570/71 Heading G3R [Also in Division F4] In an electrically heated vacuum sintering furnace, connected to a vacuum pump by a conduit, the heating of the furnace is controlled in dependence on the pressure in the furnace or the conduit, e.g. to maintain the pressure within limits. As shown, four zones of a vacuum furnace 10 are maintained at the same temperature using detectors 8a-8d, PID regulators 11, 12a-12c and regulators 7a-7d to control the power to heating elements 5a-5d in the furnace, an actual power signal being obtained from the change in resistance of the heating coils in furnace master zone. A temperature reference from detector 9 in the master zone is fed to a master regulator 11, which may limit the final temperature. The output of regulators 7a-7d, which could incorporate thyristors and PI power regulators, may be limited to a value set on regulator 21 which senses the derivative of the temperature. A pressure control throttle valve 18, between the furnace and vacuum pump 3, is controlled by motor 17 from PI vacuum regulator 16, which receives an actual pressure signal from gauge 15, and may be controlled by a pressure reference from programme 24. A signal from regulator 16, or a position sensor on valve 18, to PI regulator 19 increases the power to the heating elements, and thus the gas emission from a workpiece 4 in the furnace, until the pump is working at full capacity. Valve 18 may be replaced by an air bleed valve Fig. 2, (not shown).
GB4957071A 1970-10-27 1971-10-26 Vacuum furnaces Expired GB1357580A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE14477/70A SE349858B (en) 1970-10-27 1970-10-27

Publications (1)

Publication Number Publication Date
GB1357580A true GB1357580A (en) 1974-06-26

Family

ID=20299179

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4957071A Expired GB1357580A (en) 1970-10-27 1971-10-26 Vacuum furnaces

Country Status (13)

Country Link
US (1) US3736360A (en)
AT (1) AT311689B (en)
BE (1) BE774266A (en)
CA (1) CA957001A (en)
CH (1) CH542675A (en)
DE (1) DE2152489B2 (en)
FR (1) FR2113295A5 (en)
GB (1) GB1357580A (en)
IT (1) IT940043B (en)
LU (1) LU64131A1 (en)
NL (1) NL7114654A (en)
SE (1) SE349858B (en)
SU (1) SU566510A3 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0032404A1 (en) * 1980-01-14 1981-07-22 WITEC Cayman Patents Ltd. Method and means for removing binder from a green body
US5251231A (en) * 1989-04-10 1993-10-05 Ipsen Industries International Gmbh Vacuum furnace
EP2610354A1 (en) * 2011-12-29 2013-07-03 Ipsen, Inc. Compensating heating element arrangement for a vacuum heat treating furnace
EP2610570A1 (en) * 2011-12-29 2013-07-03 Ipsen, Inc. Heating element arrangement for a vacuum heat treating furnace

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3922527A (en) * 1974-12-26 1975-11-25 Nat Forge Co Temperature control apparatus
US4011430A (en) * 1975-05-06 1977-03-08 National Forge Company Multizone electrical furnace methods and apparatus
US4158742A (en) * 1976-11-30 1979-06-19 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration General purpose rocket furnace
US4179618A (en) * 1976-12-01 1979-12-18 Kawasaki Jukogyo Kabushiki Kaisha Apparatus for ion-nitriding treatment
US4195820A (en) * 1978-04-10 1980-04-01 Pyreflex Corporation Precise thermal processing apparatus
US4205631A (en) * 1978-10-11 1980-06-03 Westinghouse Electric Corp. Pressure limiting control for an inlet draft fan in an electric power plant
DE2906678A1 (en) * 1979-02-21 1980-09-04 Kloeckner Humboldt Deutz Ag METHOD AND DEVICE FOR BURNING AN ARTIFICIAL CARBON BODY, IN PARTICULAR AN ANODE FOR ALUMINUM MELT FLOW ELECTROLYSIS
NL8800074A (en) * 1988-01-14 1989-08-01 Philips Nv DEVICE AND METHOD FOR REMOVING AN ORGANIC BINDING AGENT FROM A PASTE
DE3910777C2 (en) * 1989-04-04 2001-08-09 Ald Vacuum Techn Ag Induction furnace with a metal crucible
SE516529C2 (en) * 1995-11-07 2002-01-22 Sandvik Ab Power control in the oven
KR20100082170A (en) * 2009-01-08 2010-07-16 삼성전자주식회사 Methods of forming a silicon oxide layer pattern and an isolation layer
DE102011103748A1 (en) 2011-05-31 2012-12-06 Ipsen International Gmbh Method for controlling vacuum pumps in an industrial furnace plant
JP6631080B2 (en) * 2015-08-11 2020-01-15 セイコーエプソン株式会社 Method for producing sintered body and heating furnace
CN108253780B (en) * 2018-04-02 2023-12-15 宁波恒普技术股份有限公司 Realize vacuum sintering stove of four regional accuse temperatures
CN113606949A (en) * 2021-07-29 2021-11-05 北京北方华创真空技术有限公司 Vacuum pumping system of multi-station degassing furnace

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3291969A (en) * 1963-10-18 1966-12-13 Electroglas Inc Temperature control system for a diffusion furnace
US3428250A (en) * 1967-05-23 1969-02-18 Gen Electric Furnace control system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0032404A1 (en) * 1980-01-14 1981-07-22 WITEC Cayman Patents Ltd. Method and means for removing binder from a green body
US5251231A (en) * 1989-04-10 1993-10-05 Ipsen Industries International Gmbh Vacuum furnace
EP2610354A1 (en) * 2011-12-29 2013-07-03 Ipsen, Inc. Compensating heating element arrangement for a vacuum heat treating furnace
EP2610570A1 (en) * 2011-12-29 2013-07-03 Ipsen, Inc. Heating element arrangement for a vacuum heat treating furnace

Also Published As

Publication number Publication date
SU566510A3 (en) 1977-07-25
IT940043B (en) 1973-02-10
DE2152489A1 (en) 1972-05-31
CA957001A (en) 1974-10-29
CH542675A (en) 1973-10-15
SE349858B (en) 1972-10-09
AT311689B (en) 1973-11-26
US3736360A (en) 1973-05-29
NL7114654A (en) 1972-05-02
DE2152489B2 (en) 1975-01-09
FR2113295A5 (en) 1972-06-23
BE774266A (en) 1972-02-14
LU64131A1 (en) 1972-05-12

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee