EP0127075A2 - Installation de four avec un four et un convoyeur - Google Patents

Installation de four avec un four et un convoyeur Download PDF

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Publication number
EP0127075A2
EP0127075A2 EP84105600A EP84105600A EP0127075A2 EP 0127075 A2 EP0127075 A2 EP 0127075A2 EP 84105600 A EP84105600 A EP 84105600A EP 84105600 A EP84105600 A EP 84105600A EP 0127075 A2 EP0127075 A2 EP 0127075A2
Authority
EP
European Patent Office
Prior art keywords
furnace
rollers
path
roller
goods
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
EP84105600A
Other languages
German (de)
English (en)
Other versions
EP0127075B1 (fr
EP0127075A3 (en
Inventor
Walter Dipl.-Ing. Schminke
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.)
VGT AG
Original Assignee
VGT AG
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 VGT AG filed Critical VGT AG
Priority to AT84105600T priority Critical patent/ATE35455T1/de
Publication of EP0127075A2 publication Critical patent/EP0127075A2/fr
Publication of EP0127075A3 publication Critical patent/EP0127075A3/de
Application granted granted Critical
Publication of EP0127075B1 publication Critical patent/EP0127075B1/fr
Expired 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
    • F27B9/02—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity of multiple-track type; of multiple-chamber type; Combinations of furnaces
    • F27B9/021—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity of multiple-track type; of multiple-chamber type; Combinations of furnaces having two or more parallel tracks
    • F27B9/022—With two tracks moving in opposite directions
    • F27B9/023—With two tracks moving in opposite directions with a U turn at one end
    • 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
    • F27B9/2407—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 the conveyor being constituted by rollers (roller hearth furnace)

Definitions

  • the invention relates to a furnace system with a heatable furnace, in particular enamelling furnace, and a conveyor, in particular an endlessly designed conveyor device, on which goods carriers, automatically or by hand, are passed through the furnace, the individual roles of the side walls of the Penetrate the furnace and are connected to a drive outside the furnace and are provided with a bearing.
  • Such furnace systems are known in particular in enamel technology. They are used to bake the enamel coating in the heated and therefore hot oven. In the hottest zone of an enamel furnace, a temperature of, for example, 85o ° C. are available. However, the present invention can also be used for other fields of application of technology with low or even higher temperatures in the hottest zone of the furnace.
  • a furnace system of the type described at the outset is known and is referred to, for example, as a continuous roller hearth furnace.
  • a conveyor which can be provided to run endlessly, leads through the furnace.
  • the oven has an oven inlet and a separate oven outlet.
  • the furnace inlet and furnace outlet are usually provided or arranged on the two ends of the furnace.
  • the conveying device is designed as a roller conveyor, ie rollers are mounted in a stationary manner and each is provided with a drive, so that a goods carrier with items located thereon is automatically transported on this roller conveyor as a result of the drive of the rollers.
  • the prior art as well as the present invention may lack product carriers if the goods themselves are suitable for running on the rollers of the conveyor.
  • Reverse furnace systems are also known in enamelling technology, with a furnace and an endless conveyor.
  • the conveyor device In contrast to a roller conveyor, however, the conveyor device also has moving parts which are guided through the furnace and consequently have to be additionally heated.
  • the conveying device can be designed as a hanging conveying device, ie suspended racks are provided which hang from a conveying means, for example a guided chain. The individual pieces of goods must then be hung or placed on the racks.
  • Another type of conveyor is known as a so-called underfloor conveyor.
  • a slot extends under the conveyor track in the furnace, through which supports protrude from below into the furnace chamber or combustion chamber. Rust-like goods carriers are attached to the supports, onto which the goods are placed.
  • such a reversing furnace has only a single furnace opening, which serves as an entrance and an exit, which are thus arranged directly next to each other.
  • the conveying device is reversed by passing the conveying means over a circular disk or the like and thus reversing the conveying direction.
  • the advantage of these reversing ovens is the better use of fuel. There is no need for a forced cooling system because the still cold items are passed directly next to the hot items in the infeed path or the outfeed path and thus this area of the oven serves as a heat exchanger.
  • Such a reversing furnace also enables an advantageously compact design and can therefore also be set up in confined spaces.
  • the invention has for its object to provide a reversal option for the goods in a furnace system of the type described above, that is to say with a conveyor designed as a roller conveyor, which permits automatic, mechanical loading or manual loading, so that the advantages of the reversing furnace, esp. whose good heat utilization becomes applicable.
  • a conveyor designed as a roller conveyor, which permits automatic, mechanical loading or manual loading, so that the advantages of the reversing furnace, esp. whose good heat utilization becomes applicable.
  • it is about, in the hot zone of the furnace, in which no or if possible no storage and drive parts of the conveyor device can be accommodated and only the rollers of the roller conveyor penetrate the side of the furnace wall and extend across the interior of the furnace, the possibility of reversing the conveying direction so that the furnace inlet and outlet can be arranged directly next to each other.
  • rollers of the roller track at least comprise at least in the hot zone of the furnace such a length within the clear furnace width that goods carriers g do with oppositeRONrich- can bepiclikure one another such that adjacent to each other in the hot zone of the furnace by the roller conveyor an infeed and an outfeed are provided that in the area of the infeed or the outfeed multiple roll rollers are provided, each lying on two adjacent rolls, the length of which corresponds approximately to the width of a product carrier, and that in the area of the closed head end of the furnace between At the end of the run-in path and the start of the run-out path, a transfer device is provided for the goods carriers filled with the goods.
  • the conveyor device can be designed to be equally suitable for both manual and automatic trimming. It is also not necessary to carry out endless funding.
  • the goods carriers can easily be stacked, i.e. removed from the circuit, filled with new goods outside the conveyor and, as soon as the opportunity arises, introduced into the furnace run.
  • the oven can thus be operated very variably.
  • energy only has to be expended if goods are also transported on the conveyor, that is to say the furnace fulfills its function. With different types of goods, it is easily possible to adjust or change the conveying speed.
  • roller rollers on the half clear furnace side on the rollers makes it possible to easily use the drive of the rollers in one conveying direction for transporting the goods carriers and to use the same drive in the opposite direction, but with the help of the roller rollers the opposite conveying direction to effect.
  • Only at the head end of the furnace must a transfer device be provided in order to place the goods carriers or the goods from the end of the infeed path to the start of the outfeed path.
  • the transfer device can carry out a stroke.
  • the roller conveyor and the Roller tracks can, however, also be arranged with respect to one another in such a way that a translation takes place simply by moving the goods carrier transversely to the inlet and outlet tracks.
  • a section can also be provided in which the goods carriers are spaced apart so that there is sufficient time for the transfer device to remove one goods carrier after the other from the end of the infeed path and to place it on the beginning of the outfeed path.
  • the rolling rollers are expediently guided in the axial direction against axial running away on the rollers.
  • This can be done in that the roller rollers have a circumferential entry outside the area covered by the product carriers, into which the guide plate arranged in the oven engages.
  • This guide plate can be U-shaped, so that it can engage in the groove.
  • the guide plate in the area of each roller roller is expediently fastened to the inside of the side wall of the furnace.
  • the rollers and / or the roller rollers to have regions of diametrical offset which engage in one another, so that in this way a safeguard against axial running away is formed.
  • the transfer device has a support protruding into it through an opening in the bottom of the furnace, which acts on the goods carriers between the rollers or roller rollers of the inlet and outlet tracks; the drive for the stroke and the lateral offset of the support is provided under the bottom of the furnace, so it is located outside the hot zone under the bottom of the furnace.
  • the inlet path and the outlet path can be extended beyond the hot zone of the furnace to a part of the furnace which acts as a heat exchanger.
  • this roller conveyor forming the inlet path and the outlet path beyond the furnace exit and thus also outside the furnace.
  • the inlet and / or outlet rail track section with different conveying speeds for theressträ he g to form.
  • a path section can be provided that brings the product carriers to such a mutual distance, so that the transfer device coordinated accordingly fulfills its function properly.
  • a path section is expediently provided again, in which the goods carriers are guided directly one after the other. It also represents the hottest part of the furnace, in which the items have to be guided, for example in an enamelling furnace, with great accuracy in terms of temperature and with as little vibration as possible.
  • rollers and / or the roller rollers can have different diameters in the individual web sections and / or can be provided with drives at different speeds.
  • roller rollers on the infeed path and to drive the rollers in accordance with the conveying direction of the outfeed path.
  • This has the advantage that the run-out path can be arranged somewhat lower than the run-in path, that the transfer device only has to carry out a movement which is essentially downward under load.
  • a relatively small support distance is achieved in this way between the rollers, specifically in the area of the run-out path, in particular at the hottest point of the oven, where the product carriers are also subjected to the greatest thermal and mechanical stress.
  • guiding the roller rollers against axial runaway will produce some friction on the roller rollers so that the roller rollers rotate at a slightly lower peripheral speed than the rollers. Due to the arrangement of the roller rollers on the inlet side, the outlet is slightly faster than the inlet, so that there are only slightly larger distances between the goods carriers on the outlet side and these differences cannot add up.
  • stationary guide rails can be provided in the oven for the goods carriers in the area of the inlet and outlet tracks so that the goods carriers do not run out of the side of the inlet or outlet tracks. This prevents impacts on the furnace wall or on the roller rollers and ensures the proper passage or entry and exit of the goods carriers.
  • a conveyor device 1 has a plurality of rollers 2 arranged and stored next to one another.
  • Goods carriers 3 are placed on the rollers 2, which can have a plate-like or rust-like shape.
  • the pieces of goods 4 to be treated (FIG. 5) are placed onto these goods carriers 3 either by hand or by machine.
  • an inlet path 5 and an outlet path 6 are formed directly next to one another.
  • the goods carriers 3 in the area of the inlet path 5 are moved according to arrow 7 and the goods carriers 3 in the area of the outlet path 6 according to arrow 8, so that the inlet path 5 and outlet path 6 have mutually opposite conveying directions. How this happens despite continuous roles 2 will be explained later.
  • the goods carriers 3 can be stocked in the area of the conveyor device 1 outside the furnace either on the conveyor device 1 or separately therefrom, and this is both automatic mechanical trimming as well as trimming by hand possible.
  • the goods carriers 3 are here at a distance from one another, ie a web section 9 is formed with increased conveying speed, so that the goods carriers 3 are conveyed at a distance from one another.
  • This path section 9 is shown as brief in FIGS. 1 and 2 only for reasons of illustration technology. In fact, it can extend over a longer distance.
  • the conveyor 1 leads into or out of an oven 10. An oven inlet 11 and an oven outlet are arranged directly next to one another, so that the oven 10 has only a single open location.
  • the other end face 13 of the furnace 1o is closed and has only one opening option for repair purposes.
  • a further web section 14 is formed, in which the rollers 2, which pass through the side walls 15 and 16 of the oven, are driven at a somewhat lower speed or speed, so that the goods carriers 3 while reducing their mutual distance or one behind the other in the area of the inlet path 5 and the outlet path 6 in the oven 10 according to the arrows 7 and 8.
  • a certain minimum distance between the product carriers, which results from the friction of the guide of the roller rollers, must not be undercut, so that the speed reduction occurring on each product carrier cannot add up on the output side and thus clogging of the furnace system is avoided.
  • This path section 14 of the furnace 10 represents a heat exchanger, as it were, because the still hot articles 4 that run out according to arrow 8 and the article carriers 3 heat up the cold article carriers 3 and article 4 in the area of the inlet path 5.
  • the web section 14 acting as a heat exchanger is also considerably longer than shown in FIGS. 1 and 2. He goes at its end (Fig. 3 and 4) in the hot zone 17 of the furnace 1o, so rich in the loading, in which the actual release of heat mostly using radiators 18, which can be designed as radiant tubes, acts . It is also indicated here that the rollers 2 are provided continuously over the clear furnace width.
  • the roles 2 are inserted through openings in the side walls 15 and 16 of the furnace 10. Outside of the furnace 1o, the rollers and the drive are provided so that these parts are hardly thermally stressed.
  • the hot zone 17 or part of it represents a further web section 19, in which, as can be seen, the goods carriers 3 are again conveyed faster, that is to say brought into spacing, according to the arrows 7 and 8. In any case, this distance is required with the area of the end face 13 of the furnace 10 so that a transfer device 2o (FIG. 2) arranged there grips from the end of the infeed path 5 into goods carriers 3 arriving at the end with the goods pieces 4 sitting thereon and onto the beginning of the outflow path 6. can touch down.
  • a transfer device 2o FIG. 2 arranged there grips from the end of the infeed path 5 into goods carriers 3 arriving at the end with the goods pieces 4 sitting thereon and onto the beginning of the outflow path 6.
  • Rollers 21 are placed on the rollers in the area of the entire run-out path 6, as can best be seen from part of the path section 19. While the rollers 2 in the area of the entire conveyor device 1 are more than twice as long as the clear oven width would require, so that two goods carriers 3 can be guided next to one another in different conveying directions, the roller rollers extend only comparatively over half the length . In the present exemplary embodiment, the roller rolls 21 are provided in the region of the run-out track 6. Each roller roller 21 is placed on two adjacent rollers 2 and in turn forms a support and conveying point for each product carrier 3. It can be seen from FIG.
  • rollers 2 support the product carriers 3 in the region of the infeed path 5 at a shorter distance than the roller rollers 21 the goods carrier 3 in the area of the run-out track 6.
  • roller rollers 21 in the area of the run-in track 5 instead of in the area of the run-out track.
  • the length of the individual rollers 2 also depends on the wall thickness of the side walls 15 and 16 in the individual areas of the furnace. It goes without saying that the rollers 2 must extend outwards from the side walls 15 and 16, because bearings and drive units (not shown here) are provided for the rotary movement of the rollers 2.
  • the transfer device shown in more detail in FIG. 2 has at least one support 24 projecting through an opening 22 in the bottom 23 of the oven 10 into the interior of the oven.
  • the transfer device 20 has a drive 25 arranged outside the furnace for a lifting movement and a lateral offset. If the conveyor device 1 is to be designed as an endless conveyor, it is advisable to provide and arrange a transfer device 26 which is very similar to the transfer device 20 in the region of the other end of the conveyor device 1.
  • FIG. 7 and 8 also shows the mode of operation of the transfer device 20, specifically the transport route, which is indicated schematically by the arrows 27.
  • a guide plate 28 is indicated, which is arranged in a fixed manner in the region of each roller roller 21 and engages in a circumferential entry 29 on each roller roller 21, so that the roller roller 21 cannot move axially, that is to say always in the region of the run-out path 6 remains led.
  • Leading tion rails 3o in the area of the inlet path 5 and the outlet path 6 ensure that the goods carrier 3 and possibly the roller rollers 21 remain within the inlet path 5 or the outlet path 6 and the paths cannot change laterally.
  • roller rollers 21 can be guided on the rollers 22 against axial running away. This is also possible, for example, in that a circumferential recess is provided in the area of the rollers 2, into which a circumferential, outwardly projecting rib on the roller roller 21 engages. It goes without saying that this rib must be provided outside the area which is swept by the product carriers 3 or comes into contact with it. Different dimensions and / or different speeds in the area of the individual rollers 2 or groups of rollers 2 can produce very different effects. In FIG. 9, the transition area between two track sections is shown by a schematic line of identification 31.
  • the goods carriers 3 are conveyed adjacent to one another on the rollers 2, for example in accordance with arrow 7, for example in the area of an inlet path 5.
  • the associated outlet path 6 is represented by the roller rollers 21 and the direction of movement in accordance with arrow 8. It can be seen how the goods carriers 3 also end here one behind the other. Rollers 2 with a comparatively larger diameter are provided in the adjacent web section 33, so that the goods carriers 3 are automatically transported according to arrow 7 and are brought at a distance from one another. The distances 34 are only indicated schematically. In the area of the associated run-out path 6, the rollers 2 now have a reduced diameter which corresponds to the diameter of the rollers 2 in the path section 32.
  • rollers 21 with such a large diameter are placed on this reduced diameter that the plane on which the product carriers 3 move in the region of the outlet track 6 are flush with one another or lie in the same plane.
  • the rollers 2 in both track sections 32 and 33 are driven at the same constant speed. By varying the speed, there are other design options.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Tunnel Furnaces (AREA)
  • Rollers For Roller Conveyors For Transfer (AREA)
  • Baking, Grill, Roasting (AREA)
  • Constitution Of High-Frequency Heating (AREA)
  • Drying Of Solid Materials (AREA)
EP84105600A 1983-05-28 1984-05-17 Installation de four avec un four et un convoyeur Expired EP0127075B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84105600T ATE35455T1 (de) 1983-05-28 1984-05-17 Ofenanlage mit einem ofen und einer foerdereinrichtung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3319396A DE3319396C2 (de) 1983-05-28 1983-05-28 Ofenanlage mit einem Ofen und einer Fördereinrichtung
DE3319396 1983-05-28

Publications (3)

Publication Number Publication Date
EP0127075A2 true EP0127075A2 (fr) 1984-12-05
EP0127075A3 EP0127075A3 (en) 1986-08-27
EP0127075B1 EP0127075B1 (fr) 1988-06-29

Family

ID=6200110

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84105600A Expired EP0127075B1 (fr) 1983-05-28 1984-05-17 Installation de four avec un four et un convoyeur

Country Status (3)

Country Link
EP (1) EP0127075B1 (fr)
AT (1) ATE35455T1 (fr)
DE (1) DE3319396C2 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2210681A (en) * 1987-10-08 1989-06-14 Consultant Gas Eng Ltd Continuous kiln
EP0645206A1 (fr) * 1993-09-29 1995-03-29 MAGNETI MARELLI S.p.A. Dispositif et procédé pour le moulage par injection d'articles avec un excellent fonctionnement mécanique, d'un métal à l'état de mélange liquide-solide
WO1995015472A1 (fr) * 1993-12-01 1995-06-08 Keller Gmbh Procede de cuisson d'ebauches ceramiques et installation de mise en ×uvre dudit procede
FR2815400A1 (fr) * 2000-10-17 2002-04-19 Skf Gmbh Dispositif de transport de pieces devant subir un traitement thermique sur ou dans un four continu a rouleaux
WO2011094785A1 (fr) * 2010-02-04 2011-08-11 Ebner Industrieofenbau Gesellschaft M.B.H. Dispositif de traitement thermique de flans de tôle
US20180258506A1 (en) * 2015-09-18 2018-09-13 Schwartz Gmbh Heat treatment system

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1183389B (it) * 1985-02-21 1987-10-22 Marazzi Ceramica Procedimento e immpianto per la produzione di piastrelle ceramiche smaltate, e piastrelle cosi'ottenute
DE102009019573A1 (de) * 2009-05-02 2010-11-11 Messarius, Uwe Ofen und Verfahren zum Erwärmen wenigstens eines Werkstückes

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2023126A (en) * 1934-06-09 1935-12-03 Frank A Fahrenwald Subdivided roller bottom for sheet normalizing furnaces
DE750356C (de) * 1942-11-21 1945-01-06 Foerdereinrichtung fuer Industrieoefen mit Kugel- oder Walzenherd
FR2550852A1 (fr) * 1983-08-16 1985-02-22 Montoya Maria Four continu a sole mobile ou plancher mobile

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3328861A (en) * 1965-06-24 1967-07-04 Pullman Inc Roller hearth tunnel kilns

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2023126A (en) * 1934-06-09 1935-12-03 Frank A Fahrenwald Subdivided roller bottom for sheet normalizing furnaces
DE750356C (de) * 1942-11-21 1945-01-06 Foerdereinrichtung fuer Industrieoefen mit Kugel- oder Walzenherd
FR2550852A1 (fr) * 1983-08-16 1985-02-22 Montoya Maria Four continu a sole mobile ou plancher mobile

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2210681A (en) * 1987-10-08 1989-06-14 Consultant Gas Eng Ltd Continuous kiln
EP0645206A1 (fr) * 1993-09-29 1995-03-29 MAGNETI MARELLI S.p.A. Dispositif et procédé pour le moulage par injection d'articles avec un excellent fonctionnement mécanique, d'un métal à l'état de mélange liquide-solide
WO1995015472A1 (fr) * 1993-12-01 1995-06-08 Keller Gmbh Procede de cuisson d'ebauches ceramiques et installation de mise en ×uvre dudit procede
FR2815400A1 (fr) * 2000-10-17 2002-04-19 Skf Gmbh Dispositif de transport de pieces devant subir un traitement thermique sur ou dans un four continu a rouleaux
WO2011094785A1 (fr) * 2010-02-04 2011-08-11 Ebner Industrieofenbau Gesellschaft M.B.H. Dispositif de traitement thermique de flans de tôle
US20180258506A1 (en) * 2015-09-18 2018-09-13 Schwartz Gmbh Heat treatment system

Also Published As

Publication number Publication date
DE3319396A1 (de) 1984-11-29
EP0127075B1 (fr) 1988-06-29
EP0127075A3 (en) 1986-08-27
ATE35455T1 (de) 1988-07-15
DE3319396C2 (de) 1985-04-04

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