GB1357580A - Vacuum furnaces - Google Patents
Vacuum furnacesInfo
- 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
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).
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)
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)
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)
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 |
-
1970
- 1970-10-27 SE SE14477/70A patent/SE349858B/xx unknown
-
1971
- 1971-10-21 DE DE2152489A patent/DE2152489B2/en not_active Ceased
- 1971-10-21 BE BE774266A patent/BE774266A/en unknown
- 1971-10-22 LU LU64131D patent/LU64131A1/xx unknown
- 1971-10-25 NL NL7114654A patent/NL7114654A/xx unknown
- 1971-10-25 AT AT922371A patent/AT311689B/en not_active IP Right Cessation
- 1971-10-25 IT IT70494/71A patent/IT940043B/en active
- 1971-10-26 GB GB4957071A patent/GB1357580A/en not_active Expired
- 1971-10-26 SU SU7101708933A patent/SU566510A3/en active
- 1971-10-26 CH CH1573571A patent/CH542675A/en not_active IP Right Cessation
- 1971-10-27 US US00192999A patent/US3736360A/en not_active Expired - Lifetime
- 1971-10-27 FR FR7138551A patent/FR2113295A5/fr not_active Expired
- 1971-10-27 CA CA126,283A patent/CA957001A/en not_active Expired
Cited By (4)
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 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB1357580A (en) | Vacuum furnaces | |
GB1293132A (en) | Improvements in or relating to temperature controllers | |
GB1046120A (en) | Temperature control apparatus | |
GB546925A (en) | Means for regulating the temperature of a furnace or the like | |
ES450173A1 (en) | Furnace pressure control | |
ES355560A1 (en) | Apparatus and method for regulating the temperature of an electrical furnace | |
GB1068119A (en) | Improvements in or relating to power supply apparatus | |
IE44258L (en) | Space heating system | |
GB1438808A (en) | Method of controlling the material feed to a processing machine driven by an electric drive motor | |
GB1207347A (en) | Improvements in or relating to control systems for gas-fired circulation-water heaters | |
US3625421A (en) | System for controlling furnace temperatures without overshoot | |
GB1336528A (en) | Control system for regulating air flow | |
GB1061959A (en) | Electrical resistance heating apparatus | |
GB1085107A (en) | Improvements in or relating to power supply | |
GB1063747A (en) | Improvements in or relating to control units for automatic temperature control systems | |
GB1018814A (en) | Method and apparatus for controlling combustion | |
JPS54108180A (en) | Temperature and humidity controller | |
SU139484A1 (en) | Automatic temperature controller | |
US3050256A (en) | Automatic electrical control apparatus with overshoot control | |
SU989753A1 (en) | Induction installation for heating ferromagnetic articles | |
SU407152A1 (en) | DEVICE FOR AUTOMATIC REGULATION OF HEATING HEATING SYSTEM | |
SU560991A1 (en) | The method of regulating the tenofication turbine | |
SU1183811A1 (en) | System of automatic regulation of heating furnace thermal condition | |
GB1350153A (en) | Device for regulating room temperatures | |
SU381696A1 (en) | METHOD OF AUTOMATIC REGULATION OF THE COEFFICIENT OF THE AIR FLOW IN CAP-FURNACES |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |