EP0188659A2 - Four industriel pour le traitement thermique d'articles en continu - Google Patents

Four industriel pour le traitement thermique d'articles en continu Download PDF

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Publication number
EP0188659A2
EP0188659A2 EP85111008A EP85111008A EP0188659A2 EP 0188659 A2 EP0188659 A2 EP 0188659A2 EP 85111008 A EP85111008 A EP 85111008A EP 85111008 A EP85111008 A EP 85111008A EP 0188659 A2 EP0188659 A2 EP 0188659A2
Authority
EP
European Patent Office
Prior art keywords
conveyor belt
heat
industrial furnace
heat transfer
furnace chamber
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.)
Granted
Application number
EP85111008A
Other languages
German (de)
English (en)
Other versions
EP0188659A3 (en
EP0188659B1 (fr
Inventor
Reinhold Bayer
Gerhard Dreizler
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.)
Aichelin GmbH Germany
Original Assignee
Aichelin GmbH Germany
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 Aichelin GmbH Germany filed Critical Aichelin GmbH Germany
Priority to AT85111008T priority Critical patent/ATE58964T1/de
Publication of EP0188659A2 publication Critical patent/EP0188659A2/fr
Publication of EP0188659A3 publication Critical patent/EP0188659A3/de
Application granted granted Critical
Publication of EP0188659B1 publication Critical patent/EP0188659B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • F27B9/14—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
    • F27B9/20—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace
    • F27B9/24—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace being carried by a conveyor
    • F27B9/243—Endless-strand conveyor
    • 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
    • F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B9/38—Arrangements of devices for charging
    • 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
    • F27B9/14—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
    • F27B9/20—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace
    • F27B9/24—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace being carried by a conveyor
    • F27B9/243—Endless-strand conveyor
    • F27B2009/2438—Endless-strand conveyor with means to transfer the heat from the outcoming band to the incoming band
    • 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
    • F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B9/36—Arrangements of heating devices
    • F27B2009/3638—Heaters located above and under the track
    • 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
    • F27B9/068—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 radiant tubes, the tube being heated by a hot medium, e.g. hot gases
    • 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
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/12—Travelling or movable supports or containers for the charge
    • F27D2003/121—Band, belt or mesh
    • 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
    • F27D21/00—Arrangements of monitoring devices; Arrangements of safety devices
    • F27D2021/0007—Monitoring the pressure
    • 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
    • F27D21/00—Arrangements of monitoring devices; Arrangements of safety devices
    • F27D21/0014—Devices for monitoring temperature

Definitions

  • the invention relates to an industrial furnace for heat treatment of workpieces running through according to the preamble of the main claim.
  • the working run of the conveyor belt runs essentially horizontally from the loading opening to the chute, where it is deflected downward by 90 ° in order to leave the furnace chamber.
  • a return channel for the empty run of the conveyor belt opens into it, which is therefore deflected again in the drop channel by 90 ° in order to run into the return channel.
  • the return duct extends below the actual furnace to approximately the level of the loading opening, where the return duct opens into a water siphon.
  • the empty run of the conveyor belt thus emerges largely gas-tight from the return channel and runs into the drive device for the conveyor belt, in which it is redirected upward, now in the direction of the loading opening. Between the drive device and the loading opening
  • the conveyor belt crosses a kind of table, in the area of which the workpieces are placed on the conveyor belt, which are then transported to the furnace chamber together with the working belt of the conveyor belt.
  • the conveyor belt Since the process temperature in the furnace is high, the conveyor belt usually consists of intertwined steel spirals and accordingly has a considerable heat capacity. In the area of the drop channel, a considerable amount of heat is therefore removed from the furnace chamber by the conveyor belt, which only contributes to the heating of the environment while passing through the return channel, but is otherwise lost to the treatment process. In any case, the conveyor belt has a temperature of less than 100 ° C when it emerges from the return duct. The conveyor belt is then optionally cooled further in the drive device before it, loaded with the workpieces, re-enters the furnace chamber through the loading opening.
  • the cooled working section of the conveyor belt must now be heated up again to the process temperature, which either leads to corresponding cooling of the process gases or makes additional heating devices necessary. In any case, the conveyor belt must again be supplied with the thermal energy that it lost when passing through the return channel.
  • the amount of heat for heating the conveyor belt can be greater than the amount of heat for Heating up the workpieces to be treated.
  • the object of the invention is therefore to provide an industrial furnace in which the conveyor belt dissipates less process heat.
  • the empty run inside the furnace chamber is returned to the loading opening, the temperature of the empty run remains at the process temperature.
  • the heat transfer device provided in the area of the loading opening between the empty run and the work run results in direct heat transfer from the empty run to the work run, the heat transfer taking place as it were in the countercurrent process. This achieves two things:
  • the empty run is cooled to temperatures which preclude damage to the drive devices, without the parts thereof coming into contact with the conveyor belt having to be made of heat-resistant material.
  • the heat released during cooling is immediately absorbed by the work strand and already transferred to the workpieces stacked on it. Without additional external energy supply, the temperature of the working area is raised significantly in the direction of the process temperature.
  • the heat energy conveyed out of the empty strand from the furnace chamber is transferred to the working strand with relatively small losses and is thus transported back into the furnace chamber.
  • a particularly favorable efficiency can be achieved if the heat transfer device is arranged essentially outside the furnace chamber.
  • a very effective and mechanically simple heat transfer device consists of a large number of cylindrical rollers made of heat-conducting material and extending over the width of the conveyor belt. These rollers are rotatably mounted at right angles to the direction of movement of the work strand, the work strand running over the heat-transferring rollers and thus reducing the heat from them. Underneath the heat-transferring rollers is the empty strand, which is held in contact with the peripheral surface of the heat-transferring rollers by means of pressure devices so that the empty strand can transfer its heat to the rollers.
  • the pressure device for the empty run can either be formed by an essentially flat slideway or a plurality of pressure rollers mounted axially parallel to the heat transfer rollers.
  • the former embodiment has the advantage of being somewhat easier to manufacture, while the second embodiment requires lower driving forces for the conveyor belt.
  • either the pressure rollers or the heat transfer rollers are each mounted in an associated sliding guide, so that a respective one Roll in the direction of the slideway or the heat transferring roller is guided longitudinally.
  • the heat loss through the conveyor belt can be further reduced if a prechamber connected to the furnace chamber via the loading opening is connected to the furnace chamber, through which the conveyor belt runs and in which at least the heat transfer device and possibly the drive device are located, the prechamber being a filling opening for entering the workpieces.
  • the prechamber Apart from the better thermal insulation, the prechamber largely prevents air from being carried into the furnace atmosphere and thus an impermissible change in its composition.
  • the empty run of the conveyor belt running out of the furnace chamber namely constantly transports the furnace atmosphere into the prechamber, which is flushed with the furnace atmosphere in this way. Any external air that may enter the workpieces can be flushed out of the entrained furnace gases via the filler opening.
  • the water siphon required in the prior art is therefore not required.
  • the filling opening is arranged above the conveyor belt and, viewed in the conveying direction, in front of the heat transfer device. This is because the entire length of the heat transfer device is used in this way to transfer heat from the empty run to the work run and the workpieces.
  • the feed opening which is particularly critical with regard to the loss of furnace gases, can be reduced in its clear width if a deflection device for the empty run is arranged within the furnace chamber in the vicinity of the feed opening and raises the empty run towards the underside of the working run.
  • an industrial furnace 1 is illustrated, or the like for the continuous heat treatment of workpieces, for example for carburizing, nitriding, carbonitriding. serves.
  • the industrial furnace 1 contains an elongated, heat-insulating-lined furnace chamber 2, through which heating pipes 3 lead from side wall to side wall, in which burners are used to heat the furnace atmosphere.
  • the furnace chamber 2 contains a loading opening 5, which is adjoined to the outside by a straight antechamber 6, which is tubular and is also heat-insulated.
  • the interior 7 of the prechamber 6, which is approximately rectangular in cross section, is aligned with the loading opening 5 and ends at a filling opening 8 opposite the loading opening 5.
  • the industrial furnace 1 contains an endless heat-resistant conveyor belt 12 which can be set in motion by means of a drive device 13 upstream of the prechamber 6.
  • the run of the conveyor belt 12 emerging from the drive device 13 forms the working run 14, which enters through the filling opening 8 into the interior 7 of the prechamber 6, runs there via a heat transfer device 15 described below and finally through the loading opening 5 into the interior of the furnace chamber 2 arrives.
  • the working device 13 which runs constantly horizontally from a drive 10 by a stove 10, which is shown in detail in FIG. 4 in cross section.
  • a deflection device 16 for the conveyor belt 12 is arranged in the interior of the furnace chamber 2, which is formed by a cylindrical roller which can freely rotate inside the furnace chamber 2; the width of the roll corresponds to the width of the conveyor belt used in each case 12.
  • the conveyor belt is deflected 12 above the lying inside the furnace chamber 2 opening of the chute 11 to about 180 0 back in the direction of the drive device 13; Objects brought in from the working section 14 fall into the chute 11 and thus leave the furnace chamber 2.
  • the section of the conveyor belt 12 now running back below the working section 14 and referred to as the empty section 17 runs through the interior of the furnace chamber 2 back to the loading opening 5, one in the vicinity of the loading opening 5 rotatably arranged roller 18 raises the empty sag 17 freely sagging inside the furnace chamber 2 near the underside of the working strand 15, so that the loading opening 5, through which the empty strand 17 emerges again from the furnace chamber 2, only a small one must have clear height.
  • the empty run 17 passes through the heat transfer device 15 located in the pre-chamber 6 before it exits the filling opening 8 from the interior 7 of the pre-chamber 6 and enters the drive device 13.
  • the drive device 13 essentially contains two axially parallel rotatable rollers 19 and 20, of which the roller 19 serves as a tensioning roller for the conveyor belt 12, while the roller 20 is to be set in slow revolutions by a geared motor 21 for the purpose of driving the conveyor belt 12.
  • the above-mentioned stove 10 arranged inside the furnace chamber 2 essentially consists, as shown in FIG. 4, of two parallel rails 25 and 26 running at a distance from one another, which in the exemplary embodiment shown are rigid on a total of four beams 27 running across the furnace chamber 2 are attached. 4, the bars 27 are loosely inserted in corresponding recesses 28 and 29 in the lining 31 of the furnace chamber 2.
  • angular rails 25 and 26 are intended to support the working strand 14 of the conveyor belt 12, their distance from one another corresponds to the width of the conveyor belt 12, which is provided with edge-side guide strips 32 and 33 in order to prevent the workpieces from falling off.
  • the heat transfer device 15 is explained below, which is located in the antechamber 6 between the working section 14 and the empty section 17 of the conveyor belt 12.
  • the heat The transfer device 15 serves to transfer the heat continuously conveyed out of the furnace chamber 2 with the empty strand 17 to the working strand entering the furnace chamber 2 from the pre-chamber 6, whereby two things are achieved:
  • the empty strand 17 is opened after exiting the furnace chamber 2 handy temperatures cooled so that no particularly heat-resistant devices are required on the part of the drive device 13.
  • the heat continuously conveyed out with the empty strand 17 is transferred to the working strand 14, which makes it possible to keep the heat loss from the furnace chamber 2 low.
  • the empty run 17 emerging from the loading opening 5 has the temperature of the furnace atmosphere of approximately 800 ° C.
  • the return strand of the mentioned 800 ° C to about 60 0 C is cooled down.
  • the thereby liberated heat is transferred to the working section provided with the workpieces 14, which, at the filling opening 8, a temperature of 40 0 C and is heated by the heat transfer device 15 in the charging opening 5 already at 600 C.
  • the heat transfer device 15 enables a significant improvement in the heat balance, because the heat emitted by the empty run 17 does not go uselessly into the environment, but can be used to heat the working run 14 and the workpieces.
  • the interior 7 of the prechamber 6 is delimited by a steel tube 41 with a rectangular cross section, which extends from the filling opening 8 to the outside of the end wall 4 of the furnace chamber 2 and the bottom 42, two parallel side walls 43, 44 and the ceiling 45 of the interior 7 forms.
  • the thermal insulation of the pre-chamber 6 is located outside the steel tube 41, the clear width of which corresponds to the width of the conveyor belt 12.
  • the heat transfer device 15 in the interior of the steel tube 41 is formed by a total of five rollers 46a to 46e, which are arranged parallel and at a distance from one another and each consist of a steel tube of corresponding width and are rotatable at right angles to the direction of movement of the conveyor belt 12.
  • the back of the working run 14 and the empty run 17 are held against these steel pipes 46a to 46e, so that a thermal contact or a thermal bridge between the two runs 14, 17 running in the opposite direction is created.
  • the empty run 17 runs over a flat and horizontally running slideway 47 fastened to the floor 42, the width of which is slightly smaller than the distance between the two guide strips 32 and 33 of the conveyor belt 12, as shown in FIG. 3.
  • the slideway 47 extends from the filling opening 8 to the loading opening 5, where it passes over an inclined ramp 48 which extends into the furnace chamber 2.
  • an inclined ramp 48 which extends into the furnace chamber 2.
  • the five heat transfer rollers 46a to 46e which can move freely in height.
  • the working strand 14 runs in the prechamber 6 with its rear side over the outer peripheral surface of the heat transfer rollers 46a to 46e and is held on the outer peripheral surface of the heat transfer rollers 46a to 46e due to gravity.
  • These heat transfer rollers 46a to 46e which are made of heat-conducting and heat-resistant material, have an outside diameter between 10 and 80 mm, but preferably a diameter between 10 and 50 mm and a center distance of about 100 mm from each other, which means that the conveyor belt 12 sags appreciably between two adjacent heat transfer rollers 46a to 46e is avoided.
  • each of the two side walls 43 and 44 contains a rectangular slot 49a to 49e, through which the heat transfer rollers 46a to 46e protrude at the end with a relatively large radial clearance, because their axial length is greater than the clear width of the distance between the two side walls 43 and 44.
  • an angled flange 51, 52 is attached outside of the interior 7 on each of the two side walls 43 and 44, which is only used as a contact surface for the each adjacent end of the heat transfer roller 46a to 46e is used.
  • a pivoting flap 54 is freely suspended above the filling opening 8, which slides along the work strand 14 and is folded up by the workpieces that move with the conveyor belt 12 into the prechamber 6. Furthermore, a flame curtain can be generated between the working section 14 and the empty section 17 with the help of burner nozzles 55, which further seals the interior of the furnace chamber 2 against the outside air. If outside air should nevertheless enter the prechamber, it is flushed out by the furnace atmosphere emerging from the prechamber 6 and its filling opening 8, which is particularly easy when the conveyor belt, as shown in FIG. 5, is particularly gas-permeable. There is then a constant slight flushing of the prechamber 6 with the furnace atmosphere, specifically over the entire cross section of the interior 7, which effectively prevents air ingress into the furnace chamber 2.
  • the conveyor belt 12 shown in perspective in FIG. 5 consists of a plurality of flattened wire spirals 56a to 56c running transversely to the longitudinal direction of the conveyor belt, two adjacent wire spirals 56a and 56b or 56b and 56c each using a common, likewise transverse round rod 57a to 57d are connected to each other.
  • Each of the plates 58a and 58d is placed on two adjacent round rods 57a to 57d, so that the scale-like superimposition of the plates 58a to 58d shown in FIG. 5 results in the longitudinal direction of the conveyor belt.
  • the round rods 57a to 57d are each bent in the same direction onto the adjacent round rod 57a to 57d and connected to it by a hook-shaped end.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Tunnel Furnaces (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
  • Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
  • General Induction Heating (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Heterocyclic Carbon Compounds Containing A Hetero Ring Having Oxygen Or Sulfur (AREA)
  • Crucibles And Fluidized-Bed Furnaces (AREA)
EP85111008A 1984-11-27 1985-08-31 Four industriel pour le traitement thermique d'articles en continu Expired - Lifetime EP0188659B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85111008T ATE58964T1 (de) 1984-11-27 1985-08-31 Industrieofen zur waermebehandlung durchlaufender werkstuecke.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3443112 1984-11-27
DE3443112A DE3443112C1 (de) 1984-11-27 1984-11-27 Industrieofen zur Waermebehandlung durchlaufender Werkstuecke

Publications (3)

Publication Number Publication Date
EP0188659A2 true EP0188659A2 (fr) 1986-07-30
EP0188659A3 EP0188659A3 (en) 1987-12-02
EP0188659B1 EP0188659B1 (fr) 1990-12-05

Family

ID=6251206

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85111008A Expired - Lifetime EP0188659B1 (fr) 1984-11-27 1985-08-31 Four industriel pour le traitement thermique d'articles en continu

Country Status (7)

Country Link
EP (1) EP0188659B1 (fr)
AT (1) ATE58964T1 (fr)
CS (1) CS261231B2 (fr)
DE (2) DE3443112C1 (fr)
DK (1) DK160656C (fr)
NO (1) NO165045C (fr)
PL (1) PL146609B1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100186940A1 (en) * 2007-07-12 2010-07-29 Jean Marc Raick Method, Device and System for the Heat Treatment of a Moving Metal Strip
CN105858279A (zh) * 2015-01-22 2016-08-17 夏佩文 一种移动式高温布料机

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1828036A (en) * 1928-06-25 1931-10-20 Frank A Fahrenwald Process of heat treating
US2319301A (en) * 1942-08-17 1943-05-18 Associated Spring Corp Contact strip annealing furnace
FR1482719A (fr) * 1966-06-09 1967-05-26 Four Electr Delemont Sa Du Four pour le traitement thermique continu de pièces métalliques
DE1483513A1 (de) * 1965-08-11 1969-02-13 Elektro Ind Ofenbau Veb Durchlaufofen mit Bandfoerderung,insbesondere zum Betrieb bei hohen Temperaturen und Schutzgasatmosphaere

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1828036A (en) * 1928-06-25 1931-10-20 Frank A Fahrenwald Process of heat treating
US2319301A (en) * 1942-08-17 1943-05-18 Associated Spring Corp Contact strip annealing furnace
DE1483513A1 (de) * 1965-08-11 1969-02-13 Elektro Ind Ofenbau Veb Durchlaufofen mit Bandfoerderung,insbesondere zum Betrieb bei hohen Temperaturen und Schutzgasatmosphaere
FR1482719A (fr) * 1966-06-09 1967-05-26 Four Electr Delemont Sa Du Four pour le traitement thermique continu de pièces métalliques

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100186940A1 (en) * 2007-07-12 2010-07-29 Jean Marc Raick Method, Device and System for the Heat Treatment of a Moving Metal Strip
CN105858279A (zh) * 2015-01-22 2016-08-17 夏佩文 一种移动式高温布料机

Also Published As

Publication number Publication date
DK543085A (da) 1986-05-28
ATE58964T1 (de) 1990-12-15
NO853857L (no) 1986-05-28
DE3580840D1 (de) 1991-01-17
EP0188659A3 (en) 1987-12-02
DK160656B (da) 1991-04-02
DK543085D0 (da) 1985-11-22
PL146609B1 (en) 1989-02-28
EP0188659B1 (fr) 1990-12-05
CS849185A2 (en) 1988-05-16
NO165045C (no) 1990-12-12
DE3443112C1 (de) 1986-08-07
NO165045B (no) 1990-09-03
PL256206A1 (en) 1986-09-23
DK160656C (da) 1991-09-02
CS261231B2 (en) 1989-01-12

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