EP0235672B1 - Durchlaufofen - Google Patents

Durchlaufofen Download PDF

Info

Publication number
EP0235672B1
EP0235672B1 EP87102267A EP87102267A EP0235672B1 EP 0235672 B1 EP0235672 B1 EP 0235672B1 EP 87102267 A EP87102267 A EP 87102267A EP 87102267 A EP87102267 A EP 87102267A EP 0235672 B1 EP0235672 B1 EP 0235672B1
Authority
EP
European Patent Office
Prior art keywords
workpieces
furnace
delivery station
switch
conveyor belt
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP87102267A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0235672A3 (en
EP0235672A2 (de
Inventor
Dieter Warga
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.)
Mahler Dienstleistungs GmbH Loeten Haerten Anlagenbau
Original Assignee
Mahler Dienstleistungs GmbH Loeten Haerten Anlagenbau
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 Mahler Dienstleistungs GmbH Loeten Haerten Anlagenbau filed Critical Mahler Dienstleistungs GmbH Loeten Haerten Anlagenbau
Priority to AT87102267T priority Critical patent/ATE48695T1/de
Publication of EP0235672A2 publication Critical patent/EP0235672A2/de
Publication of EP0235672A3 publication Critical patent/EP0235672A3/de
Application granted granted Critical
Publication of EP0235672B1 publication Critical patent/EP0235672B1/de
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
    • F27B9/14—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
    • 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 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
    • F27B9/02—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
    • F27B9/147—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 on an inclined floor

Definitions

  • the invention relates to a continuous furnace with a furnace part for heating the workpieces, a cooling part for the subsequent cooling of the workpieces and a conveyor belt which conveys workpieces through the furnace part and the cooling part to a first delivery station, a second delivery station for removing workpieces from the Oven part is provided.
  • a conveyor belt continuous furnace is known as it is used for the heat treatment of sintered parts.
  • These continuous furnaces are designed so that the sintered parts are conveyed from a feed station into a furnace part by means of a conveyor belt, in which they successively pass through a so-called stearate zone, which serves to evaporate the stearate present in the sintered parts, and then pass through a so-called sintering zone in which the actual one Sintering process takes place.
  • the sintered parts reach a temperature of approx. 1,100 ° C.
  • a cooling part with an elongated cooling zone then adjoins the furnace part of the continuous furnace, in which the sintered parts are brought back to room temperature.
  • the sintered parts can then be removed from a delivery station of the conveyor belt. The entire process from the feed station to the discharge station takes place in a protective gas atmosphere.
  • Such a second delivery station is used to immediately remove sintered parts that have just left the furnace part and are still at an operating temperature of, for example, 1,100 ° C. and can be fed to a further processing station, for example a press, in the operating state.
  • the invention is therefore based on the object of developing a continuous furnace of the type mentioned in such a way that removal of the warm workpieces in or at the end of the furnace part is possible without manual removal tools, so that the manufacturing process takes place more regularly, so that it is less prone to failure and can be automated.
  • This object is achieved in that a switch is provided between the furnace part and the cooling part, via which the workpieces either get to the cooling part with the adjoining first delivery station or directly to the second delivery station under the influence of gravity.
  • the switch can be adjusted with optional access, so that the workpieces, for example the sintered parts, under the influence of gravity either the first delivery station, for example at the end of a cooling zone of a cooling section downstream of the oven part, or else the second delivery station for example, can be fed to a press or the like. Because the workpieces only find their way through the switch under the influence of gravity, complicated adjustment devices, such as are difficult to use at points of high operating temperatures, are not necessary.
  • the switch is arranged at the lower end of a slide connected to the end of the furnace part and comprises differently oriented track sections, in particular a curve section, and a straight section, which can optionally be connected to the end of the slide.
  • This measure has the advantage that the workpieces arrive directly from the conveyor, for example a conveyor belt, on a fixed element, namely the slide, while the actual switch which directs the workpieces in one direction or another is only at the end of the slide .
  • the moving parts are thus already at a certain distance from the areas of the furnace part which are at a high operating temperature, so that the system as a whole is less susceptible to faults.
  • the switch itself is designed as a slide at the end of the furnace part, two guide plates being butt-connected in a T-shape and pivotably arranged such that in one pivot position the workpieces are passed through the one guide plate to the first delivery station and in the other pivot position over the workpieces slide the other baffle to the second delivery station.
  • the switch designed as a slide is somewhat closer to the warm part of the furnace, but due to the extremely simple construction of the switch, trouble-free operation is also ensured in this case.
  • the formation of the switch provided in this exemplary embodiment is advantageous for the applications in which the first and the second delivery station are located in mutually opposite positions.
  • the continuous furnace according to the invention can be used with particular advantage if the workpieces are sintered parts and the furnace part and the cooling part are designed to be inert gas-tight.
  • the transition from the end of the conveying device of the furnace part to the beginning of the conveying device of the cooling part is designed as an inert gas-tight channel.
  • the continuous furnace according to the invention can be designed such that the workpieces are arranged on the conveyor device on lines inclined to the conveying direction.
  • This measure has the advantage that the workpieces individually approach the front transfer edge at the end of the conveyor, so that despite the high packing density on the conveyor, for example on the conveyor belt, the workpieces are separated by successively reaching the slide, for example.
  • FIGS. 1 and 2 are a total of a conveyor belt continuous furnace, as can be used for hard and high-temperature soldering, bright annealing and hardening under a controlled atmosphere with a continuous machining process.
  • the devices for heating, regulating, supplying and removing protective gas and the like are known per se and are not shown in FIGS. 1 and 2 for the sake of clarity.
  • a furnace part 15 and a cooling part 16 spatially separated therefrom, which extends parallel to the furnace part 15, can be seen.
  • Fig. 1 shows that the furnace part 15 is designed to rise slightly in the conveying direction, the angle of rise 17 preferably being approximately 10 °.
  • a feed station for sintered parts 19 is indicated at 18, which are placed there on a first conveyor belt 20.
  • the first conveyor belt 20 arrives at an entrance 21 of the furnace part 15 with a slight increase corresponding to the angle 17, where it first passes through a stearate zone 22 indicated in FIG. 2 and then through a sintering zone 23.
  • the sintered parts 19 now fall over an edge of a transport roller 28 forming the end of the first conveyor belt 20 in the direction of an arrow 27 onto a chute 26 which extends within a gas-tight channel 29 to the cooling part 16.
  • the slide 26 opens there into a switch 30 designed as a slide, which is arranged in FIG. 2 so as to be displaceable in the horizontal direction.
  • the chute 26 opens into a curve piece 31 of the switch 30, so that the sintered parts 19 reach a second conveyor belt 32 of the cooling part 16.
  • the sintered parts 19 can finally be removed at a first delivery station 33 at the end of the second conveyor belt 32.
  • the slide 26 opens into a straight piece 34 of the switch 30 and the sintered parts 19 slide through the switch 30 into a second delivery station 35, which for example can lead to a press 36.
  • the mode of operation of the conveyor belt continuous furnace 10 according to FIGS. 1 and 2 is as follows:
  • the sintered parts 19 are placed on the first conveyor belt 20 at the feed station 18 and pass through the heated furnace part 15 with its stearate zone 22, in which the stearate of the sintered parts 19 is evaporated and its sintered zone 23.
  • the furnace part 15 is filled with hot protective gas by the heating process , this hot protective gas tends to rise so that the point of highest temperature is in the area of the end chamber 25.
  • the heated protective gas can do not escape from the end chamber 25, which leads to particularly low heat losses.
  • the switch 30 When sintered parts 19 are treated, which subsequently, i. H. in the still warm state, to be further processed on the press 36, the switch 30 is in the position not shown in FIG. 2 and the incoming sintered parts 19 slip directly to the press 36.
  • FIG. 3 shows, on a greatly enlarged scale, a plan view of the first conveyor belt 20 in the region of the transport roller 28.
  • the sintered parts 19 are arranged along lines 40 which are inclined to the conveying direction, for example at 45 °. In this way it is ensured that, despite the relatively high packing density on the first conveyor belt 20, the sintered parts 19 fall successively over the outer edge of the transport roller 28 onto the chute 26.
  • FIG. 1 it can be seen that a sintered part 19a has already slipped over the edge of the transport roller 28, the sintered parts 19b, then 19c and then 19d will follow one after the other and so on.
  • FIGS. 1 and 2 show a further, highly schematic embodiment of a conveyor belt continuous furnace according to the invention.
  • 15 'and 16' are again indicated furnace part and cooling part and it can be seen that the furnace part 15 'runs horizontally, but above the cooling part 16'.
  • the gas-tight channel 29 ' is in turn arranged at a position corresponding to FIGS. 1 and 2.
  • the feed station 18 'and the first discharge station 33' are one above the other in this embodiment.
  • the cooling part 16' can also be angled differently, that is, it does not necessarily have to extend parallel below the furnace part 15 '.
  • FIG. 6 shows a variant with a differently designed switch 50 in a partially broken representation similar to FIG. 1.
  • the end of the first conveyor belt 20 represented by the transport roller 28 is initially arranged obliquely above the start of the second conveyor belt 32a, but the second conveyor belt 32a is not arranged parallel and in the opposite direction to the first conveyor belt 20, as is the case in the exemplary embodiments of FIG 1, 2, 4 and 5 was the case, the second conveyor belt 32a is rather arranged in the front extension of the first conveyor belt 20, be it in a straight line or in an angled arrangement, depending on the available space conditions.
  • the switch 50 is arranged obliquely below the transport roller 28 and specifically in the direction of the second conveyor belt 32a, the mode of operation of which can be seen in detail in FIG. 7.
  • the switch 50 has a first guide plate 51 which can be rotated about a first spatially fixed axis 52. At a distance from the first axis 52 there is a second axis 53 on the first guide plate 51, to which a second guide plate 54 is articulated. The opposite free end of the second guide plate 54 slides, for example, on a base, which is indicated in FIG. 7 with 55.
  • the switch 50 is now flipped, it reaches the position shown in dashed lines, in which the first guide plate 51 has been pivoted away from the path of movement of the sintered part 19 sliding down, so that the sintered part 19 reaches the surface of the now exposed second guide plate 54.
  • the sintered part 19 now slides on the second guide plate 54 between the transport roller 28 and the second conveyor belt 32 to a second delivery station, indicated in FIG. 6 by 35a, which in turn can lead to a press or the like.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Tunnel Furnaces (AREA)
  • Powder Metallurgy (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Liquid Deposition Of Substances Of Which Semiconductor Devices Are Composed (AREA)
  • Filters For Electric Vacuum Cleaners (AREA)
  • Glass Compositions (AREA)
  • Filtering Materials (AREA)
EP87102267A 1986-02-22 1987-02-18 Durchlaufofen Expired EP0235672B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87102267T ATE48695T1 (de) 1986-02-22 1987-02-18 Durchlaufofen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3605725A DE3605725C1 (de) 1986-02-22 1986-02-22 Durchlaufofen
DE3605725 1986-02-22

Publications (3)

Publication Number Publication Date
EP0235672A2 EP0235672A2 (de) 1987-09-09
EP0235672A3 EP0235672A3 (en) 1987-12-23
EP0235672B1 true EP0235672B1 (de) 1989-12-13

Family

ID=6294701

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87102267A Expired EP0235672B1 (de) 1986-02-22 1987-02-18 Durchlaufofen

Country Status (5)

Country Link
EP (1) EP0235672B1 (enrdf_load_stackoverflow)
JP (2) JPS62237279A (enrdf_load_stackoverflow)
AT (1) ATE48695T1 (enrdf_load_stackoverflow)
DE (2) DE3605725C1 (enrdf_load_stackoverflow)
ES (1) ES2012463B3 (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108562162A (zh) * 2018-02-12 2018-09-21 西安中科麦特电子技术设备有限公司 用于双排传输隧道炉的光伏组件变速接驳系统

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE730294C (de) * 1940-12-24 1943-01-09 Otto Junker Fa Einseitig geschlossener Gluehofen mit endloser Foerdervorrichtung
DE2601658C3 (de) * 1976-01-17 1978-11-30 Fa. J.F. Mahler, 7300 Esslingen Kühlvorrichtung für einen an der Ein- und Auslaßseite offenen Durchlaufofen zum Wärmebehandeln von Werkstücken
JPS6020444B2 (ja) * 1982-01-12 1985-05-22 マツダ株式会社 熱間鍛造品の焼もどし炉
US4449923A (en) * 1982-05-04 1984-05-22 Chugai Ro Kogyo Co., Ltd. Continuous heat-treating furnace
JPS5938583A (ja) * 1982-08-27 1984-03-02 玉川機械株式会社 ベルト式連続雰囲気炉
DE3309206C2 (de) * 1983-03-15 1986-12-18 Müller KG Pumpen-Maschinen-Stahlbau-Bergwerks- und Industriebedarf, 4690 Herne Übergabestation für Fließfördermittel des Untertagebetriebes

Also Published As

Publication number Publication date
EP0235672A3 (en) 1987-12-23
ATE48695T1 (de) 1989-12-15
JPS62237279A (ja) 1987-10-17
DE3605725C1 (de) 1987-08-27
EP0235672A2 (de) 1987-09-09
JPH0163995U (enrdf_load_stackoverflow) 1989-04-25
JPH038949Y2 (enrdf_load_stackoverflow) 1991-03-06
DE3761167D1 (de) 1990-01-18
ES2012463B3 (es) 1990-04-01

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