EP0770691A1 - Apparatus for thermal treatment of metallic workpieces - Google Patents

Apparatus for thermal treatment of metallic workpieces Download PDF

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Publication number
EP0770691A1
EP0770691A1 EP96890164A EP96890164A EP0770691A1 EP 0770691 A1 EP0770691 A1 EP 0770691A1 EP 96890164 A EP96890164 A EP 96890164A EP 96890164 A EP96890164 A EP 96890164A EP 0770691 A1 EP0770691 A1 EP 0770691A1
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EP
European Patent Office
Prior art keywords
nozzles
distributor
annealing material
extensions
heating
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Withdrawn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
EP96890164A
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German (de)
French (fr)
Inventor
Peter Helmut Dipl.-Ing. Ebner
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Individual
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Individual
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Publication date
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Publication of EP0770691A1 publication Critical patent/EP0770691A1/en
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
    • C21D1/767—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material with forced gas circulation; Reheating thereof
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/62—Quenching devices
    • C21D1/667—Quenching devices for spray quenching
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B17/00—Furnaces of a kind not covered by any preceding group
    • F27B17/0016—Chamber type furnaces
    • F27B17/0083—Chamber type furnaces with means for circulating the atmosphere
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/06—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity heated without contact between combustion gases and charge; electrically heated
    • F27B9/10—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity heated without contact between combustion gases and charge; electrically heated heated by hot air or gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D7/00—Forming, maintaining, or circulating atmospheres in heating chambers
    • F27D7/04—Circulating atmospheres by mechanical means
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
    • C21D1/613—Gases; Liquefied or solidified normally gaseous material
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/56—Continuous furnaces for strip or wire
    • C21D9/573—Continuous furnaces for strip or wire with cooling

Definitions

  • the invention relates to a system for the heat treatment of metallic annealing material with a distributor for the heating or air or gas. Coolant, the distributor having tubular or slit-shaped nozzles directed against the annealing material which may be located on a transport device, in order to form impact jets.
  • the invention is therefore based on the object of eliminating this deficiency and reducing the expenditure of energy and quantity with comparatively simple means.
  • the invention solves this problem in that the nozzles to enlarge the Distance between the nozzle mouth and annealing material are provided with retractable extensions.
  • the nozzle outlet can thus be brought into the optimum distance from the surface of the annealing material. If the annealing material has a surface shape that deviates from the plane, e.g. by warping or changing the plate thickness, the nozzle outlets can be easily adapted to the shape of the annealing material using the retractable extensions. With these extensions, however, sufficient space for inspection purposes can also be achieved.
  • the extensions can be adjusted together by means of a frame, which is preferably formed from struts, the distance between the outlet opening of the nozzles and the surface of the annealing material being determined both by a measuring device and visually by the operating personnel. In any case, the adjustment is neither time-consuming nor labor-intensive.
  • a narrow free space is left open between the nozzle body and the extension.
  • the nozzles are cheaper to design as openings in the distributor jacket and the extensions to be retractable into the openings.
  • a plate-shaped annealing material 1 is carried out by means of drive rollers 2 in the direction of the arrow through the heat treatment system.
  • a distributor 3 which is supplied with air or gas for heating or cooling and which has pipe nozzles 4 directed against the annealing material 1, which in turn are provided with telescopically displaceable extensions 5.
  • Impact jets for the annealing material surface 1 are formed by the nozzles 4 or the extension 5.
  • the extensions 5 are connected by struts 6 to form a frame which can be adjusted from the outside.
  • Fig. 1 shows the usual position of the extension 5, whereas in Fig. 2 a completely retracted extension 5 is shown.
  • FIG. 3 shows the diagram of a plant for the heat treatment of coils.
  • a motor 8 drives a fan 9 with a guide device 10, which conveys the heating or cooling medium into the distributor space 3, which is again provided with nozzles 4 and extensions 5, the frame formed from the struts 6 having an adjusting device 11.
  • the heating or cooling medium impinging on the workpiece surface, namely a coil of tape 12 is directed back into the distribution space 3 by the fan 9, a heating device 13 being arranged upstream of this.
  • 5 shows the formation of slot-shaped nozzles 4a, the extension 5a being provided with spacers 14.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Heat Treatment Of Articles (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)

Abstract

Heat treatment plant for metallic materials, having a distributor manifold for heating/cooling air or gas, with tubular or slot nozzles directing impinging jets on the material supported on a conveying device, and the nozzles (4) having retractable extensions (5) to increase the distance between nozzle exit and material (1).

Description

Die Erfindung betrifft eine Anlage zur Wärmebehandlung von metallischem Glühgut mit einem Verteiler für das aus Luft oder einem Gas bestehende Heiz-bzw. Kühlmittel, wobei der Verteiler gegen das gegebenenfalls auf einer Transporteinrichtung liegende Glühgut gerichtete, rohr- oder schlitzförmige Düsen zur Bildung von Prallstrahlen aufweist.The invention relates to a system for the heat treatment of metallic annealing material with a distributor for the heating or air or gas. Coolant, the distributor having tubular or slit-shaped nozzles directed against the annealing material which may be located on a transport device, in order to form impact jets.

Es ist bekannt, daß die Wirkung der aus dem Düsenmund austretenden Prallstrahlen umso größer ist, je näher dieser zum Glühgut angeordnet liegt. Allerdings muß ein einwandfreies Abströmen des Heiz- bzw. Kühlmittels gewährleistet sein. Bei Runddüsen beträgt der Grenzabstand etwa 0,7 des Düsenaustrittsdurchmessers, bei Schlitzdüsen entspricht er etwa der Schlitzbreite. Werden Anlagen für hochwertige Leichtmetallbleche, wie sie z.B. in der Luftfahrtindustrie verwendet werden, zu Inspektionszwecken vom Prüfpersonal durchfahren, muß selbstverständlich eine Durchgangshöhe von etwa 450 mm vorhanden sein, weshalb die Abstände der Düsenmündungen vom Glühgut von vornherein mit 450 mm festgelegt sind. Um den Prallstrahlen die notwendige Energie für den Transport des Heiz- oder Kühlmittels zur Glühgutoberfläche zu geben, sind wegen des vergleichsweise großen Abstandes des Düsenmundes von der Glühgutoberfläche große Umwälzmengen und hohe Drücke erforderlich. Daraus ergibt sich ein entsprechend hoher Energie- und Mengenaufwand für das Heiz-bzw. Kühlmittel.It is known that the effect of the impinging jets emerging from the nozzle mouth is greater the closer it is to the annealing material. However, it must be ensured that the heating or cooling agent flows out properly. In the case of round nozzles, the limit distance is approximately 0.7 of the nozzle outlet diameter, in the case of slot nozzles it corresponds approximately to the slot width. Are systems for high-quality light metal sheets, such as those used in the aviation industry, passed through by inspection personnel for inspection purposes, there must of course be a passage height of around 450 mm, which is why the distances between the nozzle openings and the annealing material are fixed at 450 mm from the outset. In order to give the impingement jets the necessary energy for the transport of the heating or cooling medium to the surface of the annealing material, because of the comparatively large distance of the nozzle mouth from the surface of the annealing material, large amounts of circulation and high pressures are required. This results in a correspondingly high expenditure of energy and quantity for the heating or. Coolant.

Der Erfindung liegt daher die Aufgabe zugrunde, diesen Mangel zu beseitigen und mit vergleichsweise einfachen Mitteln den Energie- und Mengenaufwand herabzusetzen.The invention is therefore based on the object of eliminating this deficiency and reducing the expenditure of energy and quantity with comparatively simple means.

Die Erfindung löst diese Aufgabe dadurch, daß die Düsen zur Vergrößerung des Abstandes zwischen Düsenmund und Glühgut mit zurückziehbaren Verlängerungen versehen sind.The invention solves this problem in that the nozzles to enlarge the Distance between the nozzle mouth and annealing material are provided with retractable extensions.

Der Düsenaustritt kann also mit Hilfe dieser Verlängerungen in den optimalen Abstand zur Glühgutoberfläche gebracht werden. Hat das Glühgut eine von der Ebene abweichende Oberflächenform, z.B. durch Verwerfung oder Änderung der Plattendicke, so lassen sich die Düsenaustritte mit Hilfe der zurückziehbaren Verlängerungen der Glühgutform leicht anpassen. Es kann mit diesen Verlängerungen aber auch genügend Freiraum für Inspektionszwecke erreicht werden.With the help of these extensions, the nozzle outlet can thus be brought into the optimum distance from the surface of the annealing material. If the annealing material has a surface shape that deviates from the plane, e.g. by warping or changing the plate thickness, the nozzle outlets can be easily adapted to the shape of the annealing material using the retractable extensions. With these extensions, however, sufficient space for inspection purposes can also be achieved.

Die Verlängerungen können mittels eines vorzugsweise aus Streben gebildeten Rahmens gemeinsam verstellt werden, wobei der Abstand der Austrittsöffnung der Düsen von der Glühgutoberfläche sowohl durch eine Meßeinrichtung als auch visuell vom Bedienungspersonal bestimmt werden kann. Jedenfalls ist die Verstellung weder zeit- noch arbeitsaufwendig.The extensions can be adjusted together by means of a frame, which is preferably formed from struts, the distance between the outlet opening of the nozzles and the surface of the annealing material being determined both by a measuring device and visually by the operating personnel. In any case, the adjustment is neither time-consuming nor labor-intensive.

Erfindungsgemäß ist jeweils zwischen dem Düsenkörper und der Verlängerung ein verteilerseitig offener schmaler Freiraum belassen. Dadurch wird zufolge der hohen Prallstrahlaustrittsgeschwindigkeit eine Injektorwirkung erzielt, die den Wärmeübergang zum Werkstück weiter verbessert.According to the invention, a narrow free space is left open between the nozzle body and the extension. As a result of the high impact jet exit velocity, an injector effect is achieved which further improves the heat transfer to the workpiece.

In manchen Fällen ist es günstiger, die Düsen als Öffnungen im Verteilermantel und die Verlängerungen in die Öffnungen einziehbar auszubilden.In some cases, it is cheaper to design the nozzles as openings in the distributor jacket and the extensions to be retractable into the openings.

In der Zeichnung ist der Erfindungsgegenstand beispielsweise und rein schematisch dargestellt. Es zeigen

Fig. 1
einen Teil einer Anlage zur Wärmebehandlung von metallischem Glühgut im Vertikalschnitt,
Fig. 2
eine rohrförmige Düse mit zurückgezogener Verlängerung in gleicher Darstellungsweise,
Fig. 3
eine Anlage zur Wärmebehandlung für Bandbunde in einem Kammerofen,
Fig. 4
die Anordnung von rohrförmigen Düsen in Draufsicht und
Fig. 5
einen Teil einer schlitzförmigen Düse im Schaubild.
In the drawing, the subject of the invention is shown, for example, and purely schematically. Show it
Fig. 1
part of a plant for the heat treatment of metallic annealing material in vertical section,
Fig. 2
a tubular nozzle with retracted extension in the same representation,
Fig. 3
a system for heat treatment of coil bundles in a chamber furnace,
Fig. 4
the arrangement of tubular nozzles in plan view and
Fig. 5
part of a slit-shaped nozzle in the diagram.

Gemäß Fig. 1 wird ein plattenförmiges Glühgut 1 mit Hilfe von Antriebsrollen 2 in Pfeilrichtung durch die Anlage zur Wärmebehandlung durchgeführt. Oberhalb des Glühgutes 1 ist ein mit Luft oder Gas zur Beheizung oder Abkühlung beschickter Verteiler 3 vorgesehen, der gegen das Glühgut 1 gerichtete Rohrdüsen 4 aufweist, die ihrerseits mit teleskopartig verschiebbaren Verlängerungen 5 versehen sind. Durch die Düsen 4 bzw. die Verlängerung 5 werden Prallstrahlen für die Glühgutoberfläche 1 gebildet. Wie insbesondere Fig. 4 erkennen läßt, sind die Verlängerungen 5 durch Streben 6 zu einem Rahmen verbunden, der von außen her verstellt werden kann. Fig. 1 zeigt die übliche Stellung der Verlängerung 5, wogegen in Fig. 2 eine vollkommen zurückgezogene Verlängerung 5 dargestellt ist. Zwischen dem Düsenkörper 4 und der Verlängerung 5 ist ein verteilerseitig offener Freiraum 7 belassen, um eine lnjektorwirkung zu erzielen. Fig. 3 zeigt das Schema einer Anlage zur Wärmebehandlung von Bandbunden. Ein Motor 8 treibt einen Ventilator 9 mit Leitapparat 10 an, der das Heiz- oder Kühlmittel in den Verteilerraum 3 fördert, der wieder mit Düsen 4 und Verlängerungen 5 versehen ist, wobei der aus den Streben 6 gebildete Rahmen einen Verstellapparat 11 besitzt. Das als Prallstrahlen auf die Werkstückoberfläche, nämlich einen Bandbund 12, auftreffende Heiz- bzw. Kühlmittel wird durch den Ventilator 9 wieder zurück in den Verteilraum 3 geleitet, wobei diesem eine Heizeinrichtung 13 vorgeordnet ist. Fig. 5 zeigt die Ausbildung von schlitzförmigen Düsen 4a, wobei die Verlängerung 5a mit Abstandhaltern 14 versehen ist.1, a plate-shaped annealing material 1 is carried out by means of drive rollers 2 in the direction of the arrow through the heat treatment system. Above the annealing material 1 there is provided a distributor 3 which is supplied with air or gas for heating or cooling and which has pipe nozzles 4 directed against the annealing material 1, which in turn are provided with telescopically displaceable extensions 5. Impact jets for the annealing material surface 1 are formed by the nozzles 4 or the extension 5. As can be seen in particular in FIG. 4, the extensions 5 are connected by struts 6 to form a frame which can be adjusted from the outside. Fig. 1 shows the usual position of the extension 5, whereas in Fig. 2 a completely retracted extension 5 is shown. A free space 7 which is open on the distributor side is left between the nozzle body 4 and the extension 5 in order to achieve an injector effect. Fig. 3 shows the diagram of a plant for the heat treatment of coils. A motor 8 drives a fan 9 with a guide device 10, which conveys the heating or cooling medium into the distributor space 3, which is again provided with nozzles 4 and extensions 5, the frame formed from the struts 6 having an adjusting device 11. The heating or cooling medium impinging on the workpiece surface, namely a coil of tape 12, is directed back into the distribution space 3 by the fan 9, a heating device 13 being arranged upstream of this. 5 shows the formation of slot-shaped nozzles 4a, the extension 5a being provided with spacers 14.

Claims (4)

Anlage zur Wärmebehandlung von metallischem Glühgut (1, 12) mit einem Verteiler (3) für das aus Luft oder einem Gas bestehende Heiz- bzw. Kühlmittel, wobei der Verteiler (3) gegen das gegebenenfalls auf einer Transporteinrichtung (2) liegende Glühgut (1, 12) gerichtete rohr- oder schlitzförmige Düsen (4, 4a) zur Bildung von Prallstrahlen aufweist, dadurch gekennzeichnet, daß die Düsen (4, 4a) zur Vergrößerung des Abstandes zwischen Düsenmund und Glühgut (1, 12) mit zurückziehbaren Verlängerungen (5 bzw. 5a) versehen sind.Installation for the heat treatment of metallic annealing material (1, 12) with a distributor (3) for the heating or cooling medium consisting of air or a gas, the distributor (3) against the annealing material (1) which may be located on a transport device (2) , 12) directed tubular or slit-shaped nozzles (4, 4a) for the formation of impingement jets, characterized in that the nozzles (4, 4a) for increasing the distance between the nozzle mouth and annealing material (1, 12) with retractable extensions (5 or 5a) are provided. Anlage nach Anspruch 1, dadurch gekennzeichnet, daß die Verlängerungen (4) mittels eines vorzugsweise aus Streben (6) gebildeten Rahmens gemeinsam verstellbar sind.System according to Claim 1, characterized in that the extensions (4) can be adjusted together by means of a frame which is preferably formed from struts (6). Anlage nach Anspruch 1, dadurch gekennzeichnet, daß jeweils zwischen dem Düsenkörper (4) und der Verlängerung (5) ein verteilerseitig offener schmaler Freiraum (7) belassen ist.System according to Claim 1, characterized in that a narrow free space (7) which is open on the distributor side is left in each case between the nozzle body (4) and the extension (5). Anlage nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Düsen als Öffnungen im Verteilermantel ausgebildet und die Verlängerungen in die Öffnungen einziehbar sind.System according to claim 1 or 2, characterized in that the nozzles are designed as openings in the distributor jacket and the extensions can be drawn into the openings.
EP96890164A 1995-10-19 1996-10-16 Apparatus for thermal treatment of metallic workpieces Withdrawn EP0770691A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0174195A AT402507B (en) 1995-10-19 1995-10-19 PLANT FOR THE HEAT TREATMENT OF METALLIC FURNACE
AT1741/95 1995-10-19

Publications (1)

Publication Number Publication Date
EP0770691A1 true EP0770691A1 (en) 1997-05-02

Family

ID=3520009

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Application Number Title Priority Date Filing Date
EP96890164A Withdrawn EP0770691A1 (en) 1995-10-19 1996-10-16 Apparatus for thermal treatment of metallic workpieces

Country Status (5)

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US (1) US5770146A (en)
EP (1) EP0770691A1 (en)
JP (1) JPH09165616A (en)
AT (1) AT402507B (en)
ZA (1) ZA968796B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2886389A1 (en) * 2005-05-30 2006-12-01 Vit Sa REFUELING OVEN WITH BLOWING NOZZLES AND SEPARATE AND INTERCASIVE SUCTION PORTS
CN101555544B (en) * 2009-05-19 2011-03-09 佛山市中研非晶科技股份有限公司 Heat treatment facility for soft magnetic winding core in transverse magnetic field and method thereof

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0029281D0 (en) * 2000-11-30 2001-01-17 Boc Group Plc Quenching Method & Apparatus
US6394793B1 (en) 2001-01-13 2002-05-28 Ladish Company, Incorporated Method and apparatus of cooling heat-treated work pieces
US20030098106A1 (en) * 2001-11-29 2003-05-29 United Technologies Corporation Method and apparatus for heat treating material
DE10212234A1 (en) * 2002-03-19 2003-10-09 Junker Gmbh O Device for uniformly loading a flat surface of a workpiece with a heated gas
US20090136884A1 (en) * 2006-09-18 2009-05-28 Jepson Stewart C Direct-Fired Furnace Utilizing An Inert Gas To Protect Products Being Thermally Treated In The Furnace
DE102008020794B4 (en) 2008-02-04 2018-03-29 Volkswagen Ag Method for laser hardening steel workpieces and associated laser hardening system
KR20180012328A (en) * 2015-05-29 2018-02-05 뵈스트알파인 스탈 게엠베하 Method for uniform non-contact tempering of non-infinite surfaces to be tempered and apparatus therefor
CN105149820B (en) * 2015-09-25 2017-03-15 国网山东商河县供电公司 Cross-arm weld cooling device
CN110497682B (en) * 2019-09-11 2021-11-26 杭州鸿扬印刷有限公司 Guide conveying quenching device for environment-friendly offset plate of printing machine

Citations (2)

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Publication number Priority date Publication date Assignee Title
GB2152199A (en) * 1983-12-23 1985-07-31 Ipsen Ind Int Gmbh Industrial furnace
EP0261278A1 (en) * 1986-09-13 1988-03-30 Tokai Chemical Industries, Ltd. Heating apparatus

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU905293A1 (en) * 1979-10-03 1982-02-15 Институт черной металлургии Rolled stock cooling nozzle

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2152199A (en) * 1983-12-23 1985-07-31 Ipsen Ind Int Gmbh Industrial furnace
EP0261278A1 (en) * 1986-09-13 1988-03-30 Tokai Chemical Industries, Ltd. Heating apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2886389A1 (en) * 2005-05-30 2006-12-01 Vit Sa REFUELING OVEN WITH BLOWING NOZZLES AND SEPARATE AND INTERCASIVE SUCTION PORTS
CN101555544B (en) * 2009-05-19 2011-03-09 佛山市中研非晶科技股份有限公司 Heat treatment facility for soft magnetic winding core in transverse magnetic field and method thereof

Also Published As

Publication number Publication date
ATA174195A (en) 1996-10-15
JPH09165616A (en) 1997-06-24
ZA968796B (en) 1997-05-20
AT402507B (en) 1997-06-25
US5770146A (en) 1998-06-23

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