EP3073215B1 - Dispositif de séchage - Google Patents

Dispositif de séchage Download PDF

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Publication number
EP3073215B1
EP3073215B1 EP16161250.2A EP16161250A EP3073215B1 EP 3073215 B1 EP3073215 B1 EP 3073215B1 EP 16161250 A EP16161250 A EP 16161250A EP 3073215 B1 EP3073215 B1 EP 3073215B1
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EP
European Patent Office
Prior art keywords
drying
workpiece
zone
chamber
drying device
Prior art date
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EP16161250.2A
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German (de)
English (en)
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EP3073215A1 (fr
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Cefla Deutschland GmbH
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Cefla Deutschland GmbH
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Priority to PL16161250T priority Critical patent/PL3073215T3/pl
Publication of EP3073215A1 publication Critical patent/EP3073215A1/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
    • 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
    • F26B21/06—Controlling, e.g. regulating, parameters of gas supply
    • F26B21/12—Velocity of flow; Quantity of flow, e.g. by varying fan speed, by modifying cross flow area
    • 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
    • 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
    • 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
    • F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
    • F26B3/04—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour circulating over or surrounding the materials or objects to be dried
    • 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
    • F26B3/28—Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun
    • F26B3/283—Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun in combination with convection
    • 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
    • F26B3/28—Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun
    • F26B3/30—Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun from infrared-emitting elements

Definitions

  • the invention relates to a drying device for drying elongated workpieces coated in particular with paint, lacquer or the like in a continuous process.
  • Elongated workpieces in particular made of wood or plastic, are at least partially coated, for example after producing a profile. Coating is carried out here by a continuous process in which the workpiece is moved, for example, through a chamber in which, for example, all surfaces, only individual edges, etc. are coated in particular with paint, varnish or the like.
  • a device for coating elongated workpieces in a continuous process is, for example, in EP 10 162 699 and EP 11 174 355 described.
  • Drying must take place immediately after coating, in particular an edge of an elongated workpiece.
  • a drying device immediately after the coating device.
  • the workpiece is also transported through the drying device in a continuous process.
  • the drying removes more than 90%, preferably more than 92%, of the water in the coating material.
  • the elongated workpieces, in particular the glass-rock wool panels, can only be packed if the proportion of water is reduced, otherwise condensate will form.
  • US 2008/0099459 A1 describes a drying device for workpieces coated with paint. The drying takes place within a longitudinal, radially completely closed drying oven.
  • DE 38 17 972 A1 describes a method and an apparatus for drying perforated brick blanks.
  • the perforated brick blanks are moved in a stacked manner on a transport device through a drying channel that is open at the bottom.
  • DE 196 28 831 A1 describes a laboratory dryer, in which the material to be dried is moved through a drying channel by means of a conveyor belt.
  • WO 00/72980 A2 describes a drying process, where entire vehicle bodies are guided through a drying channel in the longitudinal pass.
  • the object of the invention is to provide a drying device for drying coated, elongated workpieces in a continuous process, with which drying of the coating can be achieved with short throughput times.
  • the object is achieved by a drying device according to claim 1 and by a method according to claim 14.
  • the drying device according to the invention for drying elongated workpieces coated with paint, lacquer or the like, for example, in a continuous process has a transport device for, in particular, continuous transport of the workpiece.
  • the elongated workpieces are glass rock wool panels as well as wood fiber panels.
  • the workpieces are essentially rectangular Cross section on, whereby individual edges and surfaces can be profiled. Since the drying device is connected in a particularly preferred arrangement directly to a coating device, it is possible to move the workpieces, for example, even with the same transport device first through the coating device and then directly through the drying device.
  • the transport device preferably has a plurality of belts or rollers on which the elongated workpiece lies for transport. If necessary, opposing belts and / or rollers are provided, between which the workpiece is arranged for transport.
  • a heat source for generating drying heat is provided in a drying area.
  • the heat source preferably has at least one, in particular several, infrared lights.
  • the at least one infrared lamp is preferably arranged parallel to the workpiece edge to be dried.
  • an air flow generating device such as a fan is provided in order to at least partially remove this drying steam in the drying area by an air flow.
  • the air flow can be generated by suction and / or blowing. It was also found that this air flow may result in unwanted cooling in the drying area. This reduction in temperature may interfere with drying, so that longer residence times would be required, which would significantly increase the manufacturing time and costs. According to the invention, therefore, there is also a control device for controlling the air flow generating device amount of air supplied to or removed from the dry area.
  • control device can be used to regulate or control the heat source.
  • control device to additionally adapt the air flow as a function of the feed speed of the workpiece to be dried.
  • the control device is preferably used to control the speed of one or more fans of the airflow generating device in order to supply air to the drying area and / or to remove or extract it from the drying area.
  • a module such as a frequency converter is provided for this.
  • the air flow generating device preferably has a supply channel and / or a discharge channel for supplying or removing air or steam to and from the drying area.
  • the feed and / or discharge channel preferably extends in the longitudinal direction of the workpiece or in the transport direction of the workpiece.
  • the feed and / or discharge channel is aligned parallel to the workpiece edge to be dried.
  • the feed and / or discharge channel extends over the entire length of the drying device.
  • Throttle devices of this type can, for example, be located in an outlet opening of the feed channel be arranged.
  • the amount of air supplied to the drying area can be varied.
  • a corresponding throttle device can also be provided in an inlet opening of a discharge duct.
  • the corresponding throttle device for setting the amount of air supplied and / or discharged to the drying area is connected to the control device.
  • the drying area according to the invention is arranged in a drying chamber.
  • the drying chamber which preferably has a substantially U-shaped cross section, is designed such that the part of the workpiece to be dried, such as a workpiece edge, protrudes into the drying chamber.
  • the drying chamber is designed such that it has a slot-shaped opening that extends in the longitudinal or transport direction of the workpiece. Part of the workpiece protrudes into the drying chamber through the opening. The elongated workpiece is transported in the longitudinal direction of the slot. Furthermore, it is preferred that the chamber wall which forms the slot-shaped opening has a heat insulation plate or consists of a heat insulation plate. This has the advantage that the high heat emitted by the heat source is in particular shadowed with respect to the transport device. In a preferred embodiment, this results in the transport device being shadowed with respect to that emitted by the heat source Warmth. This prevents damage to the transport device.
  • the opening has only a slightly greater height than the thickness of the workpiece.
  • the height of the opening is less than 10 mm, in particular less than 6 mm and particularly preferably less than 4 mm greater than the thickness of the workpiece. Essentially, there is no heat from the drying chamber in the direction of the transport device.
  • the transport device is in particular arranged completely outside the drying chamber.
  • the heat source which preferably has a plurality of infrared lights, can be designed such that a plurality of infrared lights or other heat sources surround the workpiece.
  • the heat source is preferably arranged within the drying chamber in such a way that it lies opposite the area of the workpiece to be dried, such as the workpiece edge, and preferably runs parallel to it or extends in the transport direction.
  • a moisture sensor is also provided, in particular in the drying area, which is connected to the control device.
  • One or more moisture sensors can measure the degree of moisture and are preferably provided in the at least one discharge channel.
  • a heating device is provided for heating the air supplied to the drying area. This makes it possible, despite the removal of steam from the drying area, to reduce the resultant lowering of the temperature in the drying area or even to completely avoid lowering it.
  • the drying device With the aid of the drying device according to the invention, it is in particular possible to completely dry layer thicknesses of 500 to 1000 ⁇ m or to achieve thorough drying. This can be done in a continuous process within 20 to 30 seconds.
  • the heat source generates a temperature of 30 ° C - 80 ° C on the surface to be dried. In particular, infrared lights are used as heat sources for this.
  • Medium-wave IR emitters with a wavelength of in particular 3-50 ⁇ m are preferably used as the lamp. These have a surface temperature of 850 ° C - 900 ° C. It is therefore preferred to arrange the emitters at a distance of 3 cm - 4 cm from the area to be dried, in particular to avoid damaging the surface.
  • the feed speed of the elongated workpiece in the drying device is usually at least 20 m / min. However, feed speeds of more than 50 m / min, in particular more than 100 m / min, are also possible. With the help of the drying device according to the invention, reliable and also rapid drying can take place. This is particularly advantageous for economic reasons, since the energy consumption of the lamps from 6 kWh to 12 kWh, possibly even up to 20 kWh, takes place per meter of drying length.
  • a humidification device is provided in the air flow supplied, in particular in the feed duct.
  • This allows the air supplied to the drying area to be humidified.
  • this makes it possible to set the air humidity in the drying area very precisely, so that extremely high quality can be achieved.
  • the humidification device is connected to the control device, so that the humidification device can be regulated in particular as a function of a moisture determined in the drying area by a sensor.
  • the risk of blistering is considerably reduced, particularly in the case of thick layers of, in particular, film-forming lacquers.
  • drying device is immediately followed by a coating device.
  • a coating device as shown in EP 10 162 699 or EP 11 174 355 is described.
  • the figure shows a schematic sectional view of a preferred embodiment of a drying device according to the invention.
  • a transport device in the exemplary embodiment shown has two schematically illustrated transport rollers 10.
  • An elongated workpiece 12, such as a board, is arranged between the two transport rollers 10 and is transported by the transport rollers 10 perpendicular to the plane of the drawing in the direction of an arrow 14.
  • an edge 16 of the workpiece 12 has been coated with lacquer, paint or the like in the coating device upstream of the drying device.
  • the heat source 18 is arranged in a housing 20 of the drying device. In the exemplary embodiment shown, this has a U-shaped cross section, the surface 16 to be dried projecting into the housing 20.
  • the drying heat produces drying steam in a drying area 22 by drying the lacquer or paint.
  • air is supplied to the drying area 22 via a supply channel 24 in the direction of an arrow 26 to remove the drying steam.
  • the feed channel which also extends in the longitudinal direction or transport direction 14, has one or more air flow generating devices such as fans 28.
  • the at least one fan 28 is connected to a control device 30.
  • a heat source 32 can be provided, which is preferably also controllable via the control device.
  • a throttle device 36 can be provided in the region of an outlet opening 34 of the feed channel 24. In the illustrated embodiment, this is shown as a throttle cap which can be pivoted in the direction of an arrow 38.
  • the throttle valve 36 can not only restrict the amount of air supplied, but also deflect it. The position of the throttle valve can in turn preferably be controlled with the aid of the control device.
  • a discharge channel 40 is provided opposite the feed channel 24.
  • the discharge duct 40 is constructed similarly to the feed duct 24 and also has an air flow generating device with, for example, a plurality of fans 42 in order to draw air out of the drying region 22 in the direction of an arrow 44.
  • the particular one A plurality of fans 42 are in turn connected to the control device 30 for regulation.
  • a throttle device 48 such as a throttle valve, which can be pivoted in the direction of an arrow 50, can again be provided in the region of an inlet opening 46 of the discharge duct 40.
  • the position of the throttle device 48 can in turn be controlled via the control device 30.
  • a moisture sensor 52 in the drying area 22. This is in turn connected to the control device 30.
  • an air humidification device 54 is provided in the feed channel 24. This is preferably connected to the control device 30. This can prevent the top layer of a lacquer from drying too quickly. This prevents film formation, so that the water from the paint dries to dry the paint layer.
  • the two chamber walls or heat insulating plates 56 also extend in the longitudinal direction 14 and serve as an aperture.
  • the two chamber walls 56 form an opening 58.
  • the opening 58 has a height H which corresponds to the distance between the two chamber walls 56.
  • the height H is slightly larger than the thickness d of the elongated workpiece 12. In this respect, only a small gap is formed on both sides between the opening 58 and the workpiece 12.
  • a plurality of drying devices are arranged one behind the other. It is possible for each drying device to set or regulate the individual parameters differently with the aid of a corresponding control device. It is of course possible to provide a common control device for the individual drying devices in order to coordinate them.

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

Claims (14)

  1. Dispositif de séchage destiné à sécher des pièces de fabrication allongées et revêtues dans un procédé en continu, comprenant
    un dispositif transporteur (10) destiné au transport, en particulier en continu, de pièces de fabrication (12),
    une source de chaleur (18) destinée à obtenir une chaleur de séchage dans une zone de séchage (22),
    un moyen d'obtention de flux d'air (28, 42) destiné à éliminer la vapeur de séchage hors de la zone de séchage (22) et/ou à conduire de l'humidité dans celle-ci par un flux d'air et
    un moyen de commande (30) destiné à commander la quantité d'air apportée à et/ou évacuée de la zone de séchage par le moyen d'obtention de flux d'air (28, 42),
    dans lequel la zone de séchage (22) est agencée dans une chambre de séchage (20),
    dans lequel le dispositif transporteur (14) est agencé entièrement à l'extérieur de la chambre de séchage (20),
    dans lequel la chambre de séchage (20) comporte une paroi de chambre (56), caractérisé en ce que
    la paroi de chambre (56) comporte une ouverture (58) en forme de fente s'étendant dans la direction de transport (14), de sorte que la partie à sécher (16) de la pièce de fabrication (12) peut saillir à travers l'ouverture en forme de fente (58).
  2. Dispositif de séchage selon la revendication 1, caractérisé en ce que la zone de séchage (22) de la chambre de séchage (20) présente une section essentiellement en forme de U.
  3. Dispositif de séchage selon la revendication 1, caractérisé en ce qu'une paroi de chambre (56) comportant l'ouverture en forme de fente (58) comporte des plaques calorifuges.
  4. Dispositif de séchage selon l'une des revendications 1 à 3, caractérisé en ce que le moyen d'obtention de flux d'air comporte au moins un ventilateur (28, 42), lequel est relié au moyen de commande (30) afin de commander sa vitesse de rotation, dans lequel le moyen de commande (30) comporte de préférence un module pour commander la vitesse de rotation de l'au moins un ventilateur (28, 42), en particulier un contrôleur de fréquence.
  5. Dispositif de séchage selon l'une des revendications 1 à 4, caractérisé en ce que le moyen d'obtention de flux d'air (28, 42) comporte ou est relié à un canal d'alimentation (24) et/ou un canal d'évacuation (40) pour l'alimentation en et/ou l'évacuation d'air et/ou de vapeur de séchage.
  6. Dispositif de séchage selon la revendication 5, caractérisé en ce qu'un moyen d'étranglement (36) est prévu dans une ouverture de sortie (34) du canal d'alimentation (24) afin d'établir la quantité d'air apportée à la zone de séchage (22) et/ou un moyen d'étranglement (48) est prévu dans une ouverture d'entrée (46) du canal d'évacuation (40) afin d'établir la quantité d'air et/ou de vapeur évacuée de la zone de séchage (22).
  7. Dispositif de séchage selon la revendication 6, caractérisé en ce que le moyen d'étranglement (36) du canal d'alimentation (24) et/ou le moyen d'étranglement (48) du canal d'évacuation (40) est relié au moyen de commande (30) afin d'établir la quantité d'air et/ou de vapeur apportée à et/ou évacuée de la zone de séchage.
  8. Dispositif de séchage selon l'une des revendications 1 à 7, caractérisé en ce que la source de chaleur (18) est agencée en particulier à l'opposé de la partie à sécher (16) de la pièce de fabrication (12) dans la chambre de séchage (20) et/ou la source de chaleur (18) s'étend dans la direction de transport (14) de la pièce de fabrication (12) .
  9. Dispositif de séchage selon l'une des revendications 1 à 8, caractérisé en ce que la source de chaleur (18) comporte au moins une lampe infrarouge, en particulier à ondes moyennes.
  10. Dispositif de séchage selon l'une des revendications 1 à 9, caractérisé en ce que la quantité d'air apportée et/ou évacuée est commandée, en particulier par le biais de la vitesse de rotation des ventilateurs (28, 42) et/ou de l'au moins un moyen d'étranglement (36, 48), de façon à obtenir un séchage complet du revêtement.
  11. Dispositif de séchage selon l'une des revendications 1 à 10, caractérisé en ce qu'un capteur d'humidité (52) relié au moyen de commande (30) est prévu en particulier dans la zone de séchage (22), dans lequel la quantité d'air apportée à et/ou évacuée de la zone de séchage (22) est de préférence régulée par le moyen de commande (30) en fonction de l'humidité déterminée par le capteur d'humidité (52).
  12. Dispositif de séchage selon l'une des revendications 1 à 11, caractérisé en ce qu'un moyen d'humidification de l'air (54) est prévu en particulier dans le canal d'alimentation (24), lequel est de préférence relié au moyen de commande (30) pour commande/régulation.
  13. Dispositif de séchage selon l'une des revendications 1 à 12, caractérisé en ce que le dispositif transporteur (10) est en particulier agencé entièrement à l'extérieur de la chambre de séchage (22).
  14. Procédé d'utilisation d'un dispositif de séchage destiné à sécher des pièces de fabrication allongées et revêtues dans un procédé en continu, dans lequel le dispositif de séchage comporte :
    un dispositif transporteur (10) destiné au transport, en particulier en continu, de pièces de fabrication (12),
    une source de chaleur (18) destinée à obtenir une chaleur de séchage dans une zone de séchage (22),
    un moyen d'obtention de flux d'air (28, 42) destiné à éliminer la vapeur de séchage hors de la zone de séchage (22) et/ou à conduire de l'humidité dans celle-ci par un flux d'air et
    un moyen de commande (30) destiné à commander la quantité d'air apportée à et/ou évacuée de la zone de séchage par le moyen d'obtention de flux d'air (28, 42),
    dans lequel la zone de séchage (22) est agencée dans une chambre de séchage (20), à l'intérieur de laquelle saillit la partie à sécher de la pièce de fabrication (12),
    dans lequel le guidage de la pièce de fabrication (12) à travers le dispositif de séchage s'effectue de telle sorte que seule la partie à sécher de la pièce de fabrication (12) saillit dans la chambre de séchage (20).
EP16161250.2A 2015-03-24 2016-03-18 Dispositif de séchage Active EP3073215B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL16161250T PL3073215T3 (pl) 2015-03-24 2016-03-18 Urządzenie suszące

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102015205338.5A DE102015205338A1 (de) 2015-03-24 2015-03-24 Trocknungsvorrichtung

Publications (2)

Publication Number Publication Date
EP3073215A1 EP3073215A1 (fr) 2016-09-28
EP3073215B1 true EP3073215B1 (fr) 2020-04-15

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Country Status (5)

Country Link
US (1) US9841234B2 (fr)
EP (1) EP3073215B1 (fr)
DE (1) DE102015205338A1 (fr)
ES (1) ES2805531T3 (fr)
PL (1) PL3073215T3 (fr)

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WO2014150082A1 (fr) * 2013-03-15 2014-09-25 U.S. Natural Resources, Inc. Séchoirs de bois débité multivoie unidirectionnels
DE102015205338A1 (de) * 2015-03-24 2016-09-29 Cefla Deutschland Gmbh Trocknungsvorrichtung
EP3438588B1 (fr) * 2016-03-28 2021-08-18 NGK Insulators, Ltd. Appareil de séchage à basse température
EP3551158B1 (fr) * 2016-12-08 2024-07-10 R.P. Scherer Technologies, LLC Procédé permettant d'atténuer une contrainte dans des coques de capsule permettant de réduire la propension à la rupture
CN106839720A (zh) * 2016-12-23 2017-06-13 青岛橡胶谷知识产权有限公司 一种板面积水清理装置
EP3381574A1 (fr) * 2017-03-31 2018-10-03 Vestel Elektronik Sanayi ve Ticaret A.S. Durcissement de films de peinture à base aqueuse
DE102018116358A1 (de) * 2018-07-05 2020-01-09 Eisenmann Se Behandlungsanlage und Verfahren zum Behandeln von Werkstücken
US10782742B1 (en) 2018-08-14 2020-09-22 Apple Inc. Electronic device that uses air pressure to remove liquid
US10767927B2 (en) * 2018-09-07 2020-09-08 Apple Inc. Systems for increased drying of speaker and sensor components that are exposed to moisture
CN110833983A (zh) * 2019-12-17 2020-02-25 海顺易漆富新材料(佛山)有限公司 一种水性漆干燥装置及干燥方法

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US20160282047A1 (en) 2016-09-29
ES2805531T3 (es) 2021-02-12
PL3073215T3 (pl) 2020-11-16
EP3073215A1 (fr) 2016-09-28
DE102015205338A1 (de) 2016-09-29
US9841234B2 (en) 2017-12-12

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