EP0427122B1 - Dispositif de séchage des feuilles, respectivement des pièces détachées planes - Google Patents

Dispositif de séchage des feuilles, respectivement des pièces détachées planes Download PDF

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Publication number
EP0427122B1
EP0427122B1 EP90120989A EP90120989A EP0427122B1 EP 0427122 B1 EP0427122 B1 EP 0427122B1 EP 90120989 A EP90120989 A EP 90120989A EP 90120989 A EP90120989 A EP 90120989A EP 0427122 B1 EP0427122 B1 EP 0427122B1
Authority
EP
European Patent Office
Prior art keywords
air
under
drying
suction
intake
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 - Lifetime
Application number
EP90120989A
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German (de)
English (en)
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EP0427122A1 (fr
Inventor
Gerhard Klemm
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.)
Gerhard Klemm Maschinenfabrik & Co Firma GmbH
Original Assignee
Gerhard Klemm Maschinenfabrik & Co Firma GmbH
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Filing date
Publication date
Application filed by Gerhard Klemm Maschinenfabrik & Co Firma GmbH filed Critical Gerhard Klemm Maschinenfabrik & Co Firma GmbH
Publication of EP0427122A1 publication Critical patent/EP0427122A1/fr
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Publication of EP0427122B1 publication Critical patent/EP0427122B1/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/001—Handling, e.g. loading or unloading arrangements
    • F26B25/003—Handling, e.g. loading or unloading arrangements for articles
    • F26B25/004—Handling, e.g. loading or unloading arrangements for articles in the shape of discrete sheets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B15/00—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form
    • F26B15/10—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions
    • F26B15/12—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions the lines being all horizontal or slightly inclined
    • F26B15/18—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions the lines being all horizontal or slightly inclined the objects or batches of materials being carried by endless belts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat

Definitions

  • the invention relates to a device for drying sheets, or sheet materials in a pass, wherein at least one vacuum chamber is provided below the dry material management level, which is provided with a passage cross-section, vorzw. has heatable top plate over which an air-permeable conveyor belt is guided.
  • Such a device is known from DE-C-26 07 504.
  • This device has proven itself well in practice and is used in its work, in particular behind printing machines with which webs are screen-printed.
  • Significant disadvantages of the known device are noticeable in sheet or single part printing, in particular with regard to keeping the sheets flat or the like. This disadvantage arises from the fact that the printed sheets cannot be dried with the known device, since these do not easily remain firmly on the implementation level of the device and can therefore become wavy, possibly also warp.
  • Another difficulty with drying the sheet is also the question of transport, since the web can be drawn as a whole, but sheets require a means of transport which they must also move absolutely flat.
  • the invention is therefore based on the object of considerably accelerating the drying process in order to limit the deposition of application chemicals to the area of the dryer and thereby to ensure that the sheets lie firmly during the drying and also not only permit a high working speed of the dryer, but significantly outperform other dryers.
  • the health aspects for the operating personnel should be taken into account.
  • the vacuum chamber (s) can be closed by at least one covering hood leading to the drying level and at least in the area of the inlet slot of the conveyor belt into the device, below its running level, lying transversely to the running direction, one or more Suction bars are arranged.
  • Conveyor belt made of heat-resistant material which, due to its porosity, allows the suction flow to pass into the interior of the dryer in a stable position. There they are not only heated and dried by the top plate of the vacuum chamber (s), which provides the support and heat, but also freed of their chemical substances and vapors by the heated blowing flow of the hood and pressed firmly onto the conveyor belt. Then the sheets, - running out of the dryer, - can be guided by means of the conveyor belt over another suction bar located in the outlet area, so that they are permanently held flat from the inlet area to the outlet area and cannot flutter.
  • the advantage is that not only is the drying time considerably shortened, but it is also ensured that the workpieces, such as sensitive, printed sheets, are not exposed to any warping that can easily lead to rejects.
  • the evaporating moisture of the printing ink achieves a "working" of the material which is always undesirable and which can only be avoided if very careful drying is carried out over long distances.
  • the drying section is shortened considerably, with the best result.
  • Another advantage of the invention is that e.g. When printing switch foils on screen printing machines, the drying air applied works primarily and can largely move the diffusion forces from the ink, whereby the heat supplied from below supports this process, because the material itself allows the heat transfer, but not the suction flow, which prevents evaporation could, since it would impact down. Since the material is absolutely fixed, a perfect result is guaranteed.
  • the dryer 1 is generally located at the end of a production line and receives sheets, preferably printed or coated, from a printing machine or a coating machine of any type. In particular, sheet printing on a screen printing machine is intended. But it can also be other surface articles that are fed.
  • the dryer 1 has a feed table 10, a base frame 11 and a discharge chute 12 at its discharge end.
  • the actual dryer area is closed by means of a hood, which is intended to achieve an enclosed space in the work area.
  • This hood also provides the space for the air supply by means of blowing nozzles 14, which are located in the direction of the goods carrying-through level of the conveyor belt 2 circulating.
  • the upper run of the conveyor belt 2 closes off the base frame of the dryer 1 in the region of vacuum chambers or boxes 3 located at the front, which upwards, assigned to the conveyor belt 2, have air passage cross sections 31 in their heatable top plate 30.
  • the upper run of the conveyor belt 2 runs directly in front of the inlet area into the closed housing of the dryer 1 via a, preferably rectangular or square, suction bar 4, the surface of which gives the suction pressure is assigned directly to the upper run of the conveyor belt 2.
  • the conveyor belt 2 made of heat-resistant, porous, for example woven or knitted, respectively. perforated material exists, already before and in the entrance area the suction pressure applied to the sheet 7 to be dried and holds it firmly on the conveyor belt 2.
  • This suction bar 4 is located close to the entrance slot, but in the feed table 10, and in turn corresponds to the suction bar 5, which is located directly below the outlet area of the conveyor belt 2, behind the dryer, in front of the storage chute 12. Also at the outlet, it is important that the sheet or sheets 7 or workpieces to be dried are held on the conveyor belt as if glued.
  • the surface of the suction bar and the lower surface of the conveyor belt each lie practically on one level and the sheet 7, which is carried along by the conveyor belt, is fixed thereon.
  • the workpieces 7 enter the dryer calmly, in which they are heated on the one hand by heat from the heated top plate 30 of the vacuum box (s) 3 and dry from below and on the other hand dry from above by means of the hot air by the rising vapors and so that the moisture is also blown off. They run out of the dryer, practically without their own movement. All of this happens when the sheet 7 is in a flat position by permanently holding it up to and beyond the starting area.
  • the sheet 7 In the area of the exit slot, downstream of this, the sheet 7 is thus held firmly on the conveyor belt until its end limit has passed this area. The sheet 7 is then released and slides into the storage chute 12.
  • the conveyor belt 2 can be driven continuously, but better discontinuously, for example via a known sectionally operating roller, possibly a suction roller 6, as is used in printing machines.
  • the conveyor belt is guided over deflection rollers 20, 21, 22, 23 in the feed area and 24, 25, 26 in the storage area and can therefore regenerate or unload until it runs into the dryer again and picks up a new sheet.
  • the dryer 1, with its hood 13, is shown open in a side view.
  • the hood 13 is divided into two.
  • the rear part 13a receives the air from below from the base frame 11, which is held by supports 11a.
  • the front part has an air supply space 13b, in which there are heating coils 17 which heat the air before it enters the many downward blowing nozzles 14 in order to blow off the sheets 7 and at the same time press them firmly onto the conveyor belt 2.
  • Arrow direction A shows the inflow opening into the air supply space 13b.
  • Arrow direction B indicates the possibility that the air flow can come back, which comes out of the nozzles 14 and is excess.
  • the openings 13c and 13d lie one above the other in the intermediate wall.
  • the nozzles 14 are vorzw over the entire area in the interior of the dryer. equally distributed.
  • the cover 13 also has an exhaust port 15 which can be opened or closed more or less by a flap 15a.
  • the suction pressure is generated in the vacuum chamber 3 by a suction blower 8, which sucks the air out of the vacuum chamber (s) 3, thereby holding the elbows 7 in place and supplying the blowing nozzles 14 via the exhaust air.
  • a suction blower 8 draws air from the vacuum area through its central socket and gives the blower air into a space 9 under the lower rear chamber 11a via its exhaust air socket 80, these two parts being connected to one another by one or more openings 11c.
  • the chambers 11a and 13a lie one above the other and form a closed unit in operation, especially since the wall with the openings 11c could be missing.
  • the room 9 has an inclined rear wall 19, which serves as a guide surface to the upper part
  • a significant advantage of the subject of the invention is also seen in the fact that the closed circuit of the air inside the device means that the surroundings remain practically unloaded.
  • the suction and transport roller 6 shows the suction and transport roller 6 somewhat more clearly, with the suction bar 5 arranged in front on average.
  • the conveyor belt 2 is pulled over it. Since the suction beam is rectangular in cross section, the conveyor belt lies flat, so that the suction pressure can be passed on to the material to be dried via the conveyor belt 2.
  • the suction bar extends over the entire working width and thus has its suction passage cross sections 5 'in the support area over the entire working width.
  • the suction and transport roller 6 works, as is common in screen printing, discontinuously. However, it can also be switched to continuous operation.
  • the suction and transport roller 6 and the suction bars 4, 5 are connected to the suction fan 8.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Microbiology (AREA)
  • Drying Of Solid Materials (AREA)

Claims (8)

  1. Dispositif de séchage des feuilles respectivement des pièces détachées planes pendant leur traversée, une chambre à dépression (3) étant prévue en-dessous du plan de guidage des produits à sécher et présentant une plaque supérieure (30) de préférence chauffante et équipée de fentes de passage, plaque au-dessus de laquelle circule un tapis convoyeur (2) perméable à l'air, caractérisé en ce que la(les) chambre(s) à dépression (3) est obturable par au moins un capot de couverture (13) guidant l'air jusqu'au plan de séchage et en ce qu'au moins dans la zone de la fente d'entrée par laquelle le tapis convoyeur (2) pénètre dans le dispositif sont disposées une ou plusieurs barres aspirantes (4) horizontales, transversales au sens de circulation du tapis et situées en-dessous du plan de circulation de ce dernier.
  2. Dispositif selon revendication 1, caractérisé en ce que les barres aspirantes (4,5) sont disposées aussi bien dans la zone d'entrée que dans la zone de sortie.
  3. Dispositif selon l'une des revendications 1 et 2, caractérisé en ce que les chambres à dépression (3) sont disposées dans un bâti (11) et que les capots de couverture (13) portent des tuyères soufflantes (14) dirigées vers le plan de séchage.
  4. Dispositif selon l'une ou plusieurs des revendications 1 à 3, caractérisé en ce qu'à la ou aux chambre(s) à dépression (3) est affectée une soufflante d'aspiration (8) dont l'air de sortie brassé est conduit aux tuyères soufflantes (14) via un orifice (80) et via des chambres d'amenée d'air (11a, 13a).
  5. Dispositif selon revendication 4, caractérisé en ce que des éléments chauffants (32, 17) sont affectés à la ou aux chambre(s) à dépression (3) et aux chambres d'amenée d'air (11a, 13a).
  6. Dispositif selon la revendication 4 ou 5, caractérisé en ce que les barres aspirantes (4, 5) sont raccordées à la soufflante d'aspiration (8).
  7. Dispositif selon l'une ou plusieurs des revendications 3 à 6, caractérisé en ce qu'aussi bien le capot (13) que le bâti (11) sont constitués de deux demi-parties, le passage dans la paroi et le passage du tapis convoyeur (2) se trouvant dans la partie avant et les moyens d'amenée d'air se trouvant la partie arrière, ces demi-parties étant reliées entre elles.
  8. Dispositif selon l'une ou plusieurs des revendications 1 à 7, caractérisé par une table d'alimentation (10) et un toboggan de déposition (12) devant lequel est disposée la barre aspirante (5) de préférence carrée.
EP90120989A 1989-11-06 1990-11-02 Dispositif de séchage des feuilles, respectivement des pièces détachées planes Expired - Lifetime EP0427122B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3936958A DE3936958A1 (de) 1989-11-06 1989-11-06 Vorrichtung zum trocknen von bogen bzw. flaechigen einzelteilen
DE3936958 1989-11-06

Publications (2)

Publication Number Publication Date
EP0427122A1 EP0427122A1 (fr) 1991-05-15
EP0427122B1 true EP0427122B1 (fr) 1993-02-10

Family

ID=6392988

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90120989A Expired - Lifetime EP0427122B1 (fr) 1989-11-06 1990-11-02 Dispositif de séchage des feuilles, respectivement des pièces détachées planes

Country Status (3)

Country Link
US (1) US5154010A (fr)
EP (1) EP0427122B1 (fr)
DE (2) DE3936958A1 (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4391104D2 (de) * 1992-03-19 1996-09-26 Wilfried Wiesenborn Vorrichtung zum Trocknen von auf einer bewegten Förderbahn aufliegenden Produkten, insbesondere der gummierten Leimschichten von Briefumschlägen
DE4239264A1 (de) * 1992-11-21 1994-05-26 Ltg Lufttechnische Gmbh Verfahren und Vorrichtung zum Behandeln von Werkstücken mit einem Gasstrom
DE4442557B4 (de) * 1994-11-30 2005-12-22 Heidelberger Druckmaschinen Ag Ausleger einer Bogendruckmaschine
DE29507173U1 (de) * 1995-05-03 1995-07-27 MAN Roland Druckmaschinen AG, 63075 Offenbach Trockner im Ausleger einer Bogen-Rotationsdruckmaschine
US6041515A (en) * 1998-01-12 2000-03-28 Life Technologies, Inc. Apparatus for drying solutions containing macromolecules
DE10224883B4 (de) 2001-07-27 2010-07-29 Heidelberger Druckmaschinen Ag Trockenstation und Verfahren zum Trocknen von bedruckten Bogen
US6760981B2 (en) 2002-01-18 2004-07-13 Speedline Technologies, Inc. Compact convection drying chamber for drying printed circuit boards and other electronic assemblies by enhanced evaporation
US9387698B2 (en) 2014-07-24 2016-07-12 Xerox Corporation Printer convection dryer
US10113795B2 (en) * 2015-06-26 2018-10-30 M&R Printing Equipment, Inc. Dryer conveyor belt tracking system
CN105972998B (zh) * 2016-07-11 2018-06-12 天津金戈科技发展有限责任公司 一种网带烘干机的导流设备
CN107367141A (zh) * 2017-08-01 2017-11-21 安徽华众焊业有限公司 一种电焊条药粉烘箱装置
CN112389092A (zh) * 2020-11-17 2021-02-23 临沂美华装饰纸业有限公司 一种凹版印刷用自动高效烘干装置

Family Cites Families (12)

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Publication number Priority date Publication date Assignee Title
US2651849A (en) * 1949-04-02 1953-09-15 Mechanical Handling Sys Inc Oven drier
US3254426A (en) * 1962-05-14 1966-06-07 Cardel Electric Co Inc Air-jet dryer for printed material
US3319353A (en) * 1964-03-30 1967-05-16 Niwa Machinery Company Ltd Pressing and drying devices for corrugated board manufacturing equipment
US3359648A (en) * 1965-04-05 1967-12-26 Overly S Inc Dryer with vacuum bar sheet feeder
FR2182406A6 (fr) * 1972-04-26 1973-12-07 Scaal
DE2344227C2 (de) * 1973-09-01 1982-12-09 Albert-Frankenthal Ag, 6710 Frankenthal Durchlauftrockner
DE2603238A1 (de) * 1975-02-01 1976-08-19 Jan Van Tilburg Verfahren und vorrichtung zur behandlung von faserigem oder faserhaltigem material
US4015103A (en) * 1975-02-19 1977-03-29 Xerox Corporation Fuser conveyor belt
DE2607504C3 (de) * 1976-02-25 1979-02-01 Gerhard 4800 Bielefeld Klemm Vorrichtung zum Trocknen von dünnen Materialien in Stücken oder Bahnen im Durchlauf
IT1174497B (it) * 1984-02-17 1987-07-01 Prot Srl Apparecchiatura per sterilizzare in continuo contenitore per l'industria farmaceutica del tipo a tunnel
DE3506520C2 (de) * 1984-10-27 1986-11-27 Gerhard 4800 Bielefeld Klemm Vorrichtung zum Trocknen von Einzelstücken, bestehend aus einer Anzahl von kastenartigen Vakuumkammern
US4905381A (en) * 1988-06-15 1990-03-06 Poterala Robert J Open top compact dryer oven for a web

Also Published As

Publication number Publication date
EP0427122A1 (fr) 1991-05-15
DE3936958A1 (de) 1991-05-08
DE59000885D1 (de) 1993-03-25
US5154010A (en) 1992-10-13
DE3936958C2 (fr) 1991-10-17

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