EP1642073B1 - Four a circulation d'air - Google Patents

Four a circulation d'air Download PDF

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Publication number
EP1642073B1
EP1642073B1 EP04738043A EP04738043A EP1642073B1 EP 1642073 B1 EP1642073 B1 EP 1642073B1 EP 04738043 A EP04738043 A EP 04738043A EP 04738043 A EP04738043 A EP 04738043A EP 1642073 B1 EP1642073 B1 EP 1642073B1
Authority
EP
European Patent Office
Prior art keywords
suction
pressure
circulating air
air oven
space
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.)
Not-in-force
Application number
EP04738043A
Other languages
German (de)
English (en)
Other versions
EP1642073A1 (fr
Inventor
Michael Niklaus
Christian Haas
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.)
Strahm Textile Systems AG
Original Assignee
Strahm Textile Systems 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 Strahm Textile Systems AG filed Critical Strahm Textile Systems AG
Publication of EP1642073A1 publication Critical patent/EP1642073A1/fr
Application granted granted Critical
Publication of EP1642073B1 publication Critical patent/EP1642073B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/02—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure
    • F26B21/022—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure with provisions for changing the drying gas flow pattern, e.g. by reversing gas flow, by moving the materials or objects through subsequent compartments, at least two of which have a different direction of gas flow
    • F26B21/028—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure with provisions for changing the drying gas flow pattern, e.g. by reversing gas flow, by moving the materials or objects through subsequent compartments, at least two of which have a different direction of gas flow by air valves, movable baffles or nozzle arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B13/00—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
    • F26B13/10—Arrangements for feeding, heating or supporting materials; Controlling movement, tension or position of materials

Definitions

  • the invention relates to a convection oven according to the preamble of patent claim 1.
  • Convection ovens for drying and / or melting, briefly for the treatment of guided through the oven material webs, in particular textile material webs comprise a housing in which transport means are arranged for passing a material web. Above and below the transport means nozzle boxes are mounted parallel to each other transversely to the transport direction, at the opposite, the transport means facing side surfaces nozzles are formed. Air is blown onto the material web with the nozzles. The nozzle boxes are arranged in a closed outflow space, from which the air emerging from the nozzles is sucked off and - heated and compressed - is again supplied to a pressure chamber in order to be blown through the nozzles onto the material web again.
  • a device for nonwoven bonding with hot air is known.
  • either hot air can be blown from bottom to top or from top to bottom through a fleece. It is possible to change the direction of air flow in sections.
  • a device for guiding freshly coated leaves is known. These are acted upon both from above and from below simultaneously or from above with air and below with suction air over the entire length of the drying device.
  • a device for heat treatment of a web by means of a convertible airflow is known. In this device, air can be blown from side by side arranged transversely to the material web transport direction nozzle boxes optionally from top to bottom, from bottom to top of the web.
  • the EP 0062854 shows a method and an apparatus for guiding strip-like material, in which the width of the blowing nozzles is adjustable. From the DE 43 31 496 Furthermore, a nozzle system is known, in which from lying transversely to the transport direction of the web nozzle boxes air can be blown onto the web. Sliders can be used to set the width of the nozzles that are active. An object of the present invention is therefore to provide a recirculating oven, which allows a controlled inflow and outflow of process air to the material web and away from this according to essentially arbitrary criteria.
  • a connection of the nozzle chambers and the nozzle boxes can be provided either with a suction chamber or a pressure chamber to pass targeted by the nozzle air flowing through the web and sucked through the sucking nozzles.
  • a suction chamber or a pressure chamber to pass targeted by the nozzle air flowing through the web and sucked through the sucking nozzles.
  • an optimum flow through the material web with process air can be achieved.
  • the air can be distributed transversely to the material web, when the nozzle boxes are alternately arranged in mirror image.
  • the convection oven also makes it possible to adjust the volume of air supplied to each nozzle box along the passage of the material through the convection oven in terms of volume and change.
  • the air quantity adjustment and adjustment can be adapted very quickly to the conditions.
  • the air flow can be greatly simplified and, for example, in the transport direction of the web on the one hand air in excess pressure and on the other side air in the negative pressure.
  • the circulating air oven can be modular, namely by the air-carrying, laterally arranged boxes are constructed regardless of the length of the nozzle boxes arranged therebetween.
  • FIG. 1 represented from the EP-A1 148 113 known construction of a convection oven 1 comprises an insulated housing 3, the interior of which is divided into a pressure chamber 5, a return flow 7 and a heating chamber 8.
  • the boiler room 8 is connected via a filter element 11 in connection with the return flow 7.
  • a fan 15 for example an axial fan installed.
  • the pressure chamber 5 may be connected to a heating element, a cooling element and / or a dryer.
  • the remindströmraum 7 comprises at least one transport means 17, preferably a guided around a plurality of guide rollers 19 circulating conveyor belt 21.
  • the conveyor belt 21 is made of an air-permeable material, such as a gauze, a net or a grid made of metal or plastic and is driven by a motor M.
  • a second transport means 17 ' may also be arranged above the first one, such that two runs 23 and 23' run parallel to one another and a material web 27 is guided therebetween.
  • the distance between these two runs 23, 23 ' is preferably adjustable to the thickness of the material web 25 guided therebetween.
  • the material web 25 is guided by the two transport means 17 in the direction of the arrow T through the circulating air oven 1.
  • the nozzle boxes 27 extend at right angles to the transport direction T of the material web 27 over its entire width, ie they extend over the width of the conveyor belt 21 Nozzle boxes 27, ie at the material web 25 facing side surfaces, nozzles 29 are admitted for the passage of air.
  • the nozzle boxes 27 have a cross-section narrowing from the air inlet side 31.
  • a pressure flap 35 is articulated, with which the opening cross section 37 to the pressure chamber 5 is completely or partially closed (see also FIG. 2 ).
  • This known arrangement makes it possible to direct warm air into the nozzle boxes 27 and from there onto the material web 25 from the air inlet side 31 from the pressure chamber 5.
  • the impinging on the web 25 air escapes uncontrolled side of the nozzle boxes 27 and can pass through the spaces between the adjacent nozzle boxes 27 in the remindströmraum 7.
  • the nozzle boxes 27 are shown cubic, ie also rectangular in vertical section.
  • the supply of air pressure-side opening 85
  • the extraction of air takes place on the right side through an opening 87 in a suction chamber 39, which is also over the length of the convection oven 1 extends.
  • the suction chamber 39 and the pressure chamber 5 are connected to each other via blowers as in the previous examples.
  • This embodiment of the nozzle boxes 27 results in a very balanced air distribution across the material web and regardless of the prevailing in the nozzle boxes 27 flow direction of the air.
  • FIG. 9 to 11 shown embodiment of the convection oven 1 shows next to the nozzle boxes 27 arranged one above the other the passage space 77 for the material web 25.
  • Inside the nozzle boxes 27 are horizontal swivel axes A, which are preferably mounted in at least one of the side walls 27 'and 27 ", is mounted on each swivel axis A, which divides the interior of the nozzle box 27 substantially diagonally into two wedge-shaped halves of space A extending edges 81 of Umschaltklappe 79 are preferably at a distance to the end walls of the nozzle boxes on the lower and upper side walls 27 ', 27 "at.
  • the switchover flap 79 does not pass exactly diagonally through the nozzle box 27 to allow the flap 79 to move from the one diagonal (FIG. FIG. 9 below) to the other diagonal ( FIG. 10 below), without touching the end walls.
  • the pivoting can be done with a mounted on the suction or pressure end of the Umschaltklappe 79 handle 83.
  • a closing flap 89 is preferably articulated, which is guided by a guide element 91.
  • the upper nozzle box 17 is connected to the pressure chamber 5.
  • the Umschaltklappe 79 rests with its one edge 81 at the top left and with the other edge at the bottom right of the nozzle box 17.
  • the Umsetzklappe 79 allows the entry of air from the pressure chamber 5 through the adjoining the pressure chamber 5 opening 85 in the nozzle box 27 and from there through the nozzles 29 to the material web 25.
  • the suction chamber 39 is well connected to the upper half of the nozzle box 27, but because of the Umsetzklappe 79 no connection to the nozzles 29th By pivoting the Umschaltklappe 79 in the in FIG. 10 shown below, the suction chamber 39 is now connected to the nozzles 29.
  • Each of the nozzle boxes 27 can be switched on either the suction chamber 39 or the pressure chamber 5 individually.
  • Both the pressure chamber 5 and the suction chamber 39 is connected to a plurality of nozzle boxes 27.
  • nozzle boxes 27 are used with a corresponding length L. It can consequently for differently long nozzle boxes 27 always identically formed pressure chambers 5 and suction chambers 39 are used, which consequently allow a modular production of the circulating air ovens 1.
  • the convection oven 1, as in the FIGS. 3 to 8 is shown, in addition to the pressure chamber 5 and the gearströmraum 7 comprises a suction chamber 39. This may extend adjacent to the pressure chamber 5 and / or be penetrated by the nozzle boxes 27.
  • the suction chamber 39 is in direct communication with the heating chamber 8.
  • a passage opening 41 between the suction chamber 39 and the heating chamber 8 is covered by a filter element.
  • the passage 43 can be completely or partially closed by a slider 45.
  • suction valves 49 are arranged in the connecting space 47 of the suction chamber, which allow the suction of air with the nozzles 29.
  • the air duct according to a convection oven FIG. 3 does not differ from that in the known circulating air oven when the suction-side closure means, such as suction valves 49, closed and the slider 45 is open to the suction side of the fan 15. Then namely the air flows from the nozzles 29 of the nozzle boxes 27 on the material web 25 and from there uncontrolled between the adjacent nozzle boxes 27 through into the return flow chamber 7 and further through the filter 11 into the heating chamber. 8
  • the warm air flows from the upper nozzle boxes 27 of the nozzles 29 through the web 25 and is sucked by the present in the lower nozzle boxes 27 vacuum from the nozzles 29 or vice versa. Consequently, the warm air not only contacts the upper side of the material web 25, but it is sucked through the material web 25 and comes into contact with all parts of the material web 25 and, as a side effect, the air is filtered, ie any fibers and fluff possibly detached from the surface remain in the web 25, so that only a small number of fibers or lint can pass through the suction chamber 39 to the filter 11. So that no air can escape laterally and leave the direction of flow directed perpendicular to the material web 25, nozzle beds 30 are formed between the nozzles 29. These form surfaces lying parallel to the material web 25 between the nozzles 29.
  • the feed of the material web 25 by the transport means 17 causes in the web 25 a continuous change of the air flow direction.
  • an extremely uniform flow of the material web 25 with warm air over the entire thickness of the material web 25 can be achieved.
  • FIG. 6 schematically shows a further advantageous embodiment of the invention.
  • the nozzle boxes 27 are connected by a line 51 to a multi-way valve 53 and a returnable cap, with which either a connection to a pressure line P or a suction line S can be produced.
  • the pressure line P is connected to a fan V, which is on the suction side in connection with the suction line S.
  • a filter F, a suction fan S and / or a heater H or a refrigerator C can be used.
  • FIG. 6 only two nozzle boxes 27, which are opposite to each other, representative of a plurality of nozzle boxes 27 are shown.
  • the nozzle boxes 27 are covered in this embodiment by the front side mounted shuttering 59, so that the processing space 61 between the Nozzle boxes 27, through which the material web 25 is guided, is closed. Also, the space between the individual pairwise opposed nozzle boxes 27 may be closed by appropriate formwork or it may be the nozzle boxes 27 strung together without mutual spacing. An insulating layer 63 prevents the heat exchange with the environment. In this embodiment, the air flow can be adjusted over or through the material web from pressure box to pressure box 27. The exiting from the pressure boxes 27 with pressure air is sucked through the slots connected to the suction pressure chambers 27. An uncontrolled, exiting between the pressure boxes airflow is thereby eliminated. This arrangement allows, in contrast to the above-described, an optimal access to the material web 25th
  • this arrangement allows both the supply of hot air and cold or possibly humidified air. Furthermore, the sucked back air can be cleaned in a filter F. To increase the vacuum, in particular when connecting a filter F, the pressure fan V can be supported by a suction fan S.
  • the switching of the multi-way valves 53 can be manual or when using Electromagnetically controllable valves are made by the machine control. Depending on the design of the valves 53, the inflowed / extracted air quantity can also be controlled in each individual pressure box 27.
  • the air outlet cross sections of the nozzles 29 can be adjusted. This makes it possible, for example-at the beginning of the heat treatment of the web 25 to supply a small amount of hot air and successively increase this amount, be it now until the end of the passage or only over a certain range and then by reducing the cross-sections to reduce the amount again.
  • a suitable air quantity control can also by an arrangement according to the FIGS. 6 and 7 be obtained.
  • a particularly advantageous embodiment of a closure means cap is shown.
  • This comprises a flexurally elastic sheet metal or plastic band, in short band 71, which is displaceably guided in guides 73 arranged laterally on the nozzle boxes 27.
  • the band 71 can be moved from a closed position, in which the passage for air between the nozzle box 27 and the pressure (5) and the suction chamber (7) is closed, in an open position or intermediate position, which the passage completely or to the desired extent releases.
  • the displacement of the belt 71 is preferably done by hand.
  • a tab 75 is formed at one end of the tape.
  • the belt 71 is held in the guides 73 self-locking and can therefore be brought into any desired position and held there without further technical measures. An eletromechanical shift is also possible.
  • the circulating air oven 1 or the various freely selectable options to supply or remove air gives the user a means in the hand to adapt the course of the heat treatment exactly to the material to be dried or treated.
  • the inventive convection oven 1 proves to be particularly advantageous if the material web 25 is pressed together within the housing 3 during the heat treatment by the nozzle boxes 27 or printing plates arranged thereon, the spacing of the opposing nozzle boxes 27 and / or printing plates attached thereto Material web (25) is adjustable and adjustable.
  • the juxtaposed pressure boxes 27 are switched alternately for an air passage from top to bottom or bottom to top, so provided appropriate nozzles 29, the transported in the transport direction T web 25 are vibrated. An additional vibration or vibration device for loosening the material web 25 can be omitted.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Drying Of Solid Materials (AREA)
  • Glass Compositions (AREA)
  • Electric Stoves And Ranges (AREA)
  • Cookers (AREA)

Claims (10)

  1. Four à circulation d'air (1) pour traiter un pan de matériau (25) guidé à travers le four à circulation d'air (1), comportant des moyens pour amener de l'air et des moyens pour évacuer l'air ainsi qu'une soufflante (15) pour faire circuler l'air, au moins un moyen de transport (17) pour transporter le pan de matériau (25) à travers un compartiment de passage (77) entre deux rangées agencées l'une au-dessus de l'autre de coffrets de buses (27) qui conduisent l'air et qui s'étendent perpendiculairement à la direction de transport (T) de la bande transporteuse (21) et dont les buses (29) sont disposées l'une à l'opposé de l'autre, sachant que les coffrets de buses individuels (27) peuvent être reliés au choix au côté pression ou au côté aspiration de la soufflante (15, 55) par l'intermédiaire d'un moyen de positionnement (35, 49, 53, 71, 79) et sachant que le côté pression et le côté aspiration de la soufflante (15, 55) s'embouchent jusque dans un compartiment de pression (5) ou jusque dans un compartiment d'aspiration (39), caractérisé en ce que les coffrets de buses (27) présentent la forme d'un parallélépipède ouvert au moins partiellement sur la face frontale par des ouvertures (85, 87) et en ce qu'un abattant de commutation (79) est monté en pivotement dans chaque parallélépipède et partage son compartiment intérieur en deux moitiés en forme de clavette.
  2. Four à circulation d'air selon la revendication 1, caractérisé en ce que les clapets d'aspiration et de pression (49, 35) prévus comme moyens de positionnement ainsi que les soupapes (53) peuvent être actionnés individuellement, en groupes ou en communauté.
  3. Four à circulation d'air selon l'une ou l'autre des revendications 1 et 2, caractérisé en ce que les sections transversales des buses (29) sur les coffrets de buses (27) peuvent être ajustées et réglées individuellement, en groupes ou en communauté.
  4. Four à circulation d'air selon l'une ou des revendications 1 à 3, caractérisé en ce que la distance des coffrets de buses (27) placés l'un à l'opposé de l'autre et/ou les plaques de pression qui y sont fixées peut être ajustée et réglée par rapport au pan de matériau (25).
  5. Four à circulation d'air selon la revendication 1, caractérisé en ce que de l'air peut être convoyé par la soufflante (15) jusque dans un compartiment de pression (5) et le compartiment de pression (5) peut être relié à chaque coffret de buse individuel (27) par l'ouverture des clapets de pression (35) ou des abattants de commutation (79) et en ce qu'un compartiment d'aspiration (39) relié au côté aspiration de la soufflante (15) est agencé et peut être relié aux coffrets de buse individuels (27) par l'intermédiaire des clapets d'aspiration (49) ou des abattants de commutation (79).
  6. Four à circulation d'air selon la revendication 5, caractérisé en ce que le compartiment d'aspiration (39) est relié par un tiroir (45) à un compartiment de chauffe (8) et à un compartiment de flux de retour (7).
  7. Four à circulation d'air selon l'une des revendications 1 à 6, caractérisé en ce que des bandes élastiques (71) pouvant être déplacées en translation dans des guidages (73) sont réalisées comme moyens de positionnement sur les coffrets de buse (27).
  8. Four à circulation d'air selon la revendication 1, caractérisé en ce que l'abattant de commutation (79) peut être pivoté autour d'un axe (A) s'étendant à travers son centre depuis une position d'aspiration jusque dans une position de pression et en ce que les ouvertures (85, 87) dans les surfaces frontales des coffrets de buse (27) sont reliées chacune à un compartiment de pression (5) et à un compartiment d'aspiration (39).
  9. Four à circulation d'air selon la revendication 8, caractérisé en ce qu'un clapet de fermeture (89) est monté en articulation sur l'abattant de commutation (79).
  10. Four à circulation d'air selon la revendication 9, caractérisé en ce que le compartiment de pression (5) et le compartiment d'aspiration (39) s'étendent sur toute la longueur des coffrets de buse (27) agencés l'un à côté de l'autre et en ce que la longueur (L) des coffrets de buse (27) est réalisée en étant adaptée à la largeur du pan de matériau (25).
EP04738043A 2003-07-01 2004-06-28 Four a circulation d'air Not-in-force EP1642073B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH11602003 2003-07-01
PCT/CH2004/000402 WO2005003661A1 (fr) 2003-07-01 2004-06-28 Four a circulation d'air

Publications (2)

Publication Number Publication Date
EP1642073A1 EP1642073A1 (fr) 2006-04-05
EP1642073B1 true EP1642073B1 (fr) 2008-02-20

Family

ID=33557704

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04738043A Not-in-force EP1642073B1 (fr) 2003-07-01 2004-06-28 Four a circulation d'air

Country Status (5)

Country Link
US (1) US7296995B2 (fr)
EP (1) EP1642073B1 (fr)
AT (1) ATE386913T1 (fr)
DE (1) DE502004006262D1 (fr)
WO (1) WO2005003661A1 (fr)

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EP2020457A3 (fr) * 2007-07-28 2009-04-15 Strahm Hi-Tex Systems AG Procédé et installation destinés au traitement continu de bandes de marchandise textiles
CN101871722A (zh) * 2009-04-23 2010-10-27 江苏建发科技有限公司 热风循环烘箱
RU2470779C2 (ru) * 2011-03-11 2012-12-27 Государственное образовательное учреждение высшего профессионального образования "Вологодский государственный технический университет" (ВоГТУ) Устройство для термообработки длинномерных материалов
CN103836898B (zh) * 2014-03-14 2015-09-30 湖北大帆金属制品有限公司 一种带钢烘干装置
DE102015101321B3 (de) * 2015-01-29 2016-05-25 Schlatter Deutschland Gmbh & Co. Kg Luftkasten einer Ausrüstungsmaschine
CN108627001A (zh) * 2018-06-18 2018-10-09 禹州市厚生堂中药有限公司 中药炮制用翻板式多层烘干机的翻板装置

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Also Published As

Publication number Publication date
US20060150438A1 (en) 2006-07-13
EP1642073A1 (fr) 2006-04-05
WO2005003661A1 (fr) 2005-01-13
DE502004006262D1 (de) 2008-04-03
US7296995B2 (en) 2007-11-20
ATE386913T1 (de) 2008-03-15

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