EP1161647B1 - Procede de sechage de plaques de bois de placage et dispositif de sechage associe - Google Patents

Procede de sechage de plaques de bois de placage et dispositif de sechage associe Download PDF

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Publication number
EP1161647B1
EP1161647B1 EP00909220A EP00909220A EP1161647B1 EP 1161647 B1 EP1161647 B1 EP 1161647B1 EP 00909220 A EP00909220 A EP 00909220A EP 00909220 A EP00909220 A EP 00909220A EP 1161647 B1 EP1161647 B1 EP 1161647B1
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EP
European Patent Office
Prior art keywords
veneers
drying
belts
optionally
transport
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
EP00909220A
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German (de)
English (en)
Other versions
EP1161647A1 (fr
Inventor
Ingo Grebe
Helmut WÜNSCHE
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.)
Grenzebach BSH GmbH
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Grenzebach BSH GmbH
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Filing date
Publication date
Application filed by Grenzebach BSH GmbH filed Critical Grenzebach BSH GmbH
Publication of EP1161647A1 publication Critical patent/EP1161647A1/fr
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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
    • 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
    • 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
    • F26B2210/00—Drying processes and machines for solid objects characterised by the specific requirements of the drying good
    • F26B2210/14—Veneer, i.e. wood in thin sheets

Definitions

  • the invention relates to a method for drying veneers, in particular Sliced veneers, according to the preamble of claim 1 and one Drying device for performing the method according to the preamble of Claim 4.
  • a feed device and a discharge device, each with a suction box are known from DE 25 23 482 A1.
  • the applicant is also known to: a feed device with a combination of suction box and transport system Belt and with a discharge device, a transport system with belts to install.
  • a dryer is understood to be a so-called ironing dryer.
  • two conveyor belts - a carrier belt and a shroud - that are lying directly on top of each other in parallel and between which the veneers be transported through the dryer, at least on a not insignificant Part of the transport route with multiple deflections so that the veneers alternately bent up and down.
  • the redirection can be achieved in different ways. Or on the upper conveyor belt pressure is applied with rollers.
  • EP 0 152 576 B2 describes a dryer of the generic type in which the Belt guide after a straight section with loops around rollers relatively large diameter, one between two adjacent rollers short piece is straight.
  • EP 0 290 056 A2 describes a generic dryer with a sinusoidal shape Belt guide that is achieved by many small diameter rollers. Additional rod-shaped rollers can be attached in addition to the rollers.
  • DE 41 09 298 C2 is a line design corresponding to a flat omega of the conveyor belts described in the case of at least a plurality of rollers the second and fourth rollers in the direction of the dryer inlet of the first and third are removed, the second and third rollers in one plane lie above the level of the first and fourth rollers and the distance between the two Levels is smaller than the diameter of a roller.
  • DE 42 17 493 A1 describes a zigzag-like tape guide which is offset by deflecting rollers lying one above the other is achieved.
  • the conveyor belts in the cooler are routed similarly to those in the dryer.
  • the aim of the iron dryer is to get the veneers through while drying and cooling Smoothen smoothing. Compared to dryers and coolers with a straight belt guide Without pressure, most types of wood have a significantly better smoothing reached. But with sensitive types of wood such as Beech, nut and cherry tree can Wrinkles and cracks appear that affect the veneer at least partially to make something useless.
  • the committee here is 10 to 20%.
  • the inventors set themselves the task, even for wood types that are difficult to dry to develop a process for drying veneers that is flawless Smooth veneers are obtained and the rejects are caused by folds and tears is minimized.
  • Another object is to carry out a drying device to create a method according to the invention.
  • the first object is solved by the features of claim 1.
  • the inclined position of the veneers in the dryer and in the cooler makes one component the flexing work in the deflection points also in the direction of the fibers. It has shown that all dried veneers largely without the dryer. Folds and Cracks leave when the grain of the veneers through during transportation the dryer and the cooler diagonally to the transport direction is instead of usual as before at right angles.
  • Claim 4 solves the second problem.
  • Claims 2 and 3 facilitate the manual work of the operating personnel.
  • the sub-claims 5 to 10 contain preferred embodiments of the invention Drying apparatus. The features ensure a safe Operation of the drying device.
  • the slant is the angle between the grain of the veneer and one Line perpendicular to the direction of transport is placed on the veneer when the veneers are placed Dryer specifically with the intended angle of 20 ° to 60 °, preferably 30 ° to 50 °, brought about.
  • the speeds of the veneers in the feed direction are in the feed device so differently adjusted right and left that the transfer of the veneers on the conveyor belt, which is the lower conveyor belt of the dryer, in the correct one Inclined.
  • the veneers are in during drying and cooling fixed this position because it is mechanically held between the conveyor belts are.
  • the discharge device makes the inclination through different Speeds that correspond to those in the feeder, largely reversed to facilitate further handling. The operating staff therefore does not have to get used to changing processes or handling.
  • a preferred embodiment is the use of different diameters of the driven ones Pulleys according to claim 6.
  • a braking device according to claim 8 is easy to retrofit in existing systems.
  • Claims 9 and 10 show preferred embodiments of the braking device.
  • a drying device consists of a feed device 1, a dryer 2, a cooler 3 and a discharge device 4.
  • Each of the individual devices of the drying device has its own transport system. The speed of the individual transport systems is on top of each other coordinated and depends on the drying process.
  • the feed device 1 shown as a detail in FIGS. 2 to 4 is for the semi-automatic one Feed the wet veneers.
  • a suction box 6 On a rack 5 are a suction box 6 and a transport system with belts 10, 16 arranged in parallel, 19, 24 attached.
  • the straps 10, 16, 19, 24 are arranged side by side and each over two spaced pulleys or over a pulley and led a spaced redirection.
  • the pulleys are on shafts attached.
  • the arrow 32 indicates the direction of transport.
  • the suction box 6 consists of a cuboid sheet metal construction with perforated Sheet 7 on the underside and with at least one suction pipe 8 with a fan 9, which is arranged on the suction box.
  • the suction box 6 extends over the entire width of the transport plane and is horizontal while in its longitudinal direction it is slightly inclined in the direction of transport.
  • the transport system of the feed device 1 consists of an upper and a Under belt system.
  • the upper belt system is divided into two. In the area of the suction box 6 there are endless ones Belt 10 with a flat, rectangular cross section. You are below the Suction box along the perforated plate 7 up to the pulleys 11 on the drivable shaft 12 which is parallel to and spaced from the rear lower Longitudinal edge of the suction box 6 is mounted, and back through the suction box 6 and around the deflection 13 in front of the front lower longitudinal edge of the suction box 6 perforated sheet 7 out. The shaft 12 and the deflection 13 are spaced apart in parallel stored. All pulleys 11 have the same diameter.
  • the second area of the upper belt system begins at the drivable shaft 14, the is mounted parallel to the shaft 12 between the suction box 6 and the shaft 12, and leads to the carrier belt 15 of the dryer 2.
  • the endless belts 16 with e.g. round Cross section are here from the pulleys 17 on the shaft 14 via a Cantilever arm of the frame 5 up to the deflection 18, which is parallel to the shaft 14, and led back to the pulleys 17.
  • the cantilever is vertical about shaft 14 pivotable so that the height of the deflection 18 is adjustable.
  • the pulleys 17 have different diameters so graded that a linear velocity distribution seen from the left to the right in the direction of transport.
  • the Deviating from the horizontal, shaft 14 is so inclined that the lower edges the belt 16 mounted on the pulleys 17 with the perforated Plate 7 are aligned.
  • the pulleys 17 and the deflection 18 point to their peripheral areas e.g. semicircular recesses in which the straps 16 are led.
  • the lower belt system is located below the upper belt system.
  • the belt system is divided into two parts. In the front area, the - in the direction of transport seen - starts below the last third of the suction box 6 and in the area ends below the shaft 12, all belts 19 are at the same speed driven.
  • the endless belts 19 with a flat, rectangular cross section are via the pulleys 20 on the shaft 21 and the pulleys 22 on the driven shaft 23 out.
  • the pulleys assigned to a shaft 21, 23 20, 22 each have the same diameter.
  • In the second area there are endless ones Belt 24 a e.g.
  • the pulleys 25 have different diameters and show like that Deflection 27 on their peripheral surfaces recesses that are about the Cross section of the belt 24 correspond and in which the belt 24 are guided.
  • the Deviating from the horizontal, shaft 26 is so inclined that the upper edges the belt 24 guided on the pulleys 25 with the transport surface aligned.
  • the pulleys 11, 17, 20, 22, 25 are each fixed to the associated shaft 12, 14, 21, 23, 26 connected.
  • the diameters of the pulleys 17, 25 of different sizes are thus one on the other matched that the speed of the belts 16, 24 continuously from - in Transport direction seen - decreases left to right or vice versa and thus also the transport speed of the veneers 31.
  • the belts 10, 16, 19, 24 are connected via a drive system with e.g. Gear motor 29 and chain drive 30 drivable.
  • the operating staff lifts a veneer 31 in such a way that at least one part gets into the suction area of the suction box 6 and then completely against it perforated sheet 7 and the belt 10 is pressed.
  • the belts 10 of the feeder 1 convey the veneer 31 along the perforated plate 7 in the direction Dryer 2.
  • the veneer 31 becomes due to the difference in speed the belt 16, 24 placed in a desired inclined position.
  • the required speed difference can be easily from the transport route between the shaft 26 and the deflection 27 and the angle of the inclined position calculate.
  • FIGS. 5 and 6 Another embodiment of the invention according to claim 6 is in FIGS. 5 and 6 shown.
  • the structure corresponds to the previous description with the difference that the different speeds of the belts 16, 24, which are also flat belts can be achieved by individual drives 34, 36:
  • the shaft 12 can be driven together with the shaft 23 of the lower belt system.
  • the Pulleys 33 all of the same size, are between the shaft 12 and the Suction box 6 stored individually.
  • the axis of rotation of the pulleys 33 is parallel to Shaft 12.
  • Each pulley 33 has its own controllable drive 34.
  • the pulleys 35 are the same size, are individually stored and each have an adjustable drive 36.
  • the speeds of the drives 34, 36 are adjusted so that the Speed of the belts 16, 24 linearly from left to right or vice versa decreases and the desired inclined position of the veneer 31 is reached, wherein in The transport speed dependent on the process is observed.
  • the invention also includes all other arrangements and drive options that allow different belt speeds.
  • FIG. 7 Another embodiment of the invention according to claim 9 is shown in Figure 7.
  • the Structure corresponds to that of Figures 2 to 4 with the differences that the pulleys 17, 25 have the same diameter and that a braking device is installed is.
  • a braking device is off-center in approximately 2/3 of the width of the feed device 1 below or above the transport plane between two adjacent belts 16, 24 arranged.
  • the braking device consists of a nozzle 37 with an internal one Suction fan 38 and an opening 39 directed towards the transport plane Opening 39 is in the immediate vicinity of the transport level. Between suction fan 38 and opening 39, a flap 40 is arranged.
  • the suction fan 38 In operation, the suction fan 38 generates a negative pressure in the nozzle 37.
  • the flap 40 is closed. The moment a veneer 31 passes the nozzle 37 opens the flap 40. As a result of the pressure drop, the veneer 31 is against the opening 39 pressed and held on one side, while the other side of the veneer 31 is transported further. After a certain time interval that depends on the transport speed and depends on the inclination to be achieved, the flap 40 closes and the nozzle 37 releases the veneer 31, which is now in the desired angle has reached. The further transport to the carrier belt 15 of the dryer 2 now takes place evenly on both sides of the veneer 31 so that its position is preserved.
  • an external vacuum source on the nozzle 37 can also be used be connected.
  • FIG. 8 Another embodiment of a braking device according to claim 10 is in Figure 8 shown.
  • a drivable disc 41 is less below the transport path Distance between two adjacent belts 16, 24 off-center in about 2/3 of the Width of the feed device 1 arranged.
  • the upper tangent of disc 41 is aligned with the transport path, the axis of rotation is perpendicular to the transport direction.
  • Above the disk 41 is a rotatably mounted disk 42 on a punch 43 attached.
  • the axis of rotation of the disk 42 is perpendicular to and parallel to the axis of rotation the disc 41.
  • the punch 43 can be driven up and down, e.g. about pneumatics or electromagnet.
  • the disk 41 is constantly over e.g. a gear motor 44 slowly driven.
  • the direction of rotation of the disk 41 corresponds to the direction of transport, the peripheral speed is much slower than the transport speed of the Belt system.
  • the Stamp 43 so that the disc 42 presses the veneer 31 against the disc 41. Due to the low peripheral speed of the disk 41, the veneer 31 braked on one side and thus warped into an inclined position. Once the required Oblique position is reached, the punch 43 retracts and releases the veneer 31, so that it is transported to the carrying belt 15 in the inclined position provided.
  • a discharge device 4 according to claim 6 is shown as a detail in FIG.
  • On a frame 45 is a transport system with belts 46.
  • the round Belts are from the pulleys 48 on the driven shaft 49 via the Deflection 47 and led back.
  • the pulleys 48 have different gradations Diameter; their arrangement is such that the inclination of the veneers 31st is reversed in dryer 2 and cooler 3.
  • the shaft 49 is so oblique stored that the upper edge of the belt 46 guided on the pulleys 48 with the transport track is aligned.
  • the shaft 49 is coupled to a drive 50.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Solid Materials (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
  • Veneer Processing And Manufacture Of Plywood (AREA)
  • Ink Jet (AREA)

Claims (10)

  1. Procédé de séchage de bois de placage, en particulier de bois de placage tranché, comprenant au moins les étapes d'admission, de séchage, le cas échéant de refroidissement et d'évacuation des bois de placage, les bois de placage changeant plusieurs fois de direction et / ou étant soumis à une pression entre deux bandes transporteuses lors du séchage et le cas échéant lors du refroidissement, caractérisé en ce que les bois de placage sont placés en oblique lors de l'admission, l'angle entre la direction des fibres des bois de placage et une ligne perpendiculaire au sens de transport du séchoir étant de 20° à 60°, et en ce que les bois de placage sont séchés et refroidis dans cette position oblique.
  2. Procédé selon la revendication 1, caractérisé en ce que les bois de placage sont amenés, lors de l'évacuation, d'une position oblique dans une position approximativement perpendiculaire au sens de transport.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que les bois de placage sont transportés à gauche et à droite à des vitesses différentes pendant l'admission et, le cas échéant, pendant l'évacuation.
  4. Dispositif de séchage pour mettre en oeuvre le procédé selon une des revendications 1 à 3, constitué de
    un dispositif d'admission (1) avec une boíte d'aspiration (6) et / ou un système de transport avec plusieurs courroies (10),
    un séchoir (2) avec plusieurs zones et un système de transport comportant une bande porteuse (16) et une bande de couverture,
    le cas échéant, un refroidisseur (3) avec un système de transport comportant une bande porteuse et une bande de couverture et
    un dispositif d'évacuation (4) avec un système de transport comportant plusieurs courroies (46),
    dans lequel une pression est exercée à plusieurs endroits sur les bois de placage (31) dans le séchoir (2) et, le cas échéant, dans le refroidisseur (3) par plusieurs changements de direction des bandes transporteuses ou par des rouleaux de pression et dans lequel les vitesses des différents systèmes de transport peuvent être réglées en fonction les unes des autres, caractérisé en ce que dans le dispositif d'admission (1) et, le cas échéant, dans le dispositif d'évacuation (4) - vu dans le sens de transport - des vitesses différentes peuvent être réglées à gauche et à droite.
  5. Dispositif de séchage selon la revendication 4, caractérisé en ce que les différentes courroies (16, 24, 46) des systèmes de transport du dispositif d'admission (1) et, le cas échéant, du dispositif d'évacuation (4) peuvent être entraínées à des vitesses différentes.
  6. Dispositif de séchage selon la revendication 5, caractérisé en ce que les poulies actionnables (17, 25, 48) ont des diamètres différents, un entraínement (29, 50) agissant sur toutes les arbres actionnables (12, 14, 23, 26).
  7. Dispositif de séchage selon la revendication 5, caractérisé en ce que les poulies actionnables (33, 35) ont des entraínements individuels (34, 36) réglables.
  8. Dispositif de séchage selon la revendication 4, caractérisé en ce que dans le dispositif d'admission (1), un dispositif de freinage pour les bois de placage (31) est installé en dehors du centre de la largeur de la voie de transport.
  9. Dispositif de séchage selon la revendication 8, caractérisé en ce que le dispositif de freinage est une tuyère à vide (37) avec une ouverture (39) pilotable dirigée vers le plan de transport à peu de distance de la voie de transport.
  10. Dispositif de séchage selon la revendication 8, caractérisé en ce qu'une poulie actionnable (41) est disposée sous la voie de transport à hauteur du bord supérieur des courroies (24) et un piston (43) avec une poulie (42) placée de manière rotative est disposé au-dessus de la poulie (41).
EP00909220A 1999-03-11 2000-02-19 Procede de sechage de plaques de bois de placage et dispositif de sechage associe Expired - Lifetime EP1161647B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19910832 1999-03-11
DE19910832A DE19910832C1 (de) 1999-03-11 1999-03-11 Verfahren zum Trocknen von Furnieren und Trocknungsvorrichtung
PCT/EP2000/001383 WO2000053984A1 (fr) 1999-03-11 2000-02-19 Procede de sechage de plaques de bois de placage et dispositif de sechage associe

Publications (2)

Publication Number Publication Date
EP1161647A1 EP1161647A1 (fr) 2001-12-12
EP1161647B1 true EP1161647B1 (fr) 2004-05-06

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EP00909220A Expired - Lifetime EP1161647B1 (fr) 1999-03-11 2000-02-19 Procede de sechage de plaques de bois de placage et dispositif de sechage associe

Country Status (12)

Country Link
US (1) US6581300B1 (fr)
EP (1) EP1161647B1 (fr)
JP (1) JP3754894B2 (fr)
AT (1) ATE266182T1 (fr)
BR (1) BR0008864A (fr)
CA (1) CA2371552C (fr)
DE (2) DE19910832C1 (fr)
DK (1) DK1161647T3 (fr)
ES (1) ES2220418T3 (fr)
PT (1) PT1161647E (fr)
TW (1) TW469337B (fr)
WO (1) WO2000053984A1 (fr)

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DE102004040552B4 (de) * 2004-08-21 2007-02-08 Grenzebach Bsh Gmbh Trockner für Furnierblätter
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DE102005019643A1 (de) * 2005-04-26 2006-11-02 Grenzebach Bsh Gmbh Furniertrockner
US8046932B2 (en) 2006-10-12 2011-11-01 Usnr/Kockums Cancar Company Method and apparatus for inhibiting pitch formation in the wet seal exhaust duct of a veneer dryer
US8196310B2 (en) 2007-02-09 2012-06-12 Usnr/Kockums Cancar Company Method and apparatus for controlling cooling temperature and pressure in wood veneer jet dryers
DE102007018018A1 (de) * 2007-04-17 2008-10-23 Helmut Spielvogel Kontakttrocknung von Messerfurnieren im Bügeltrockner
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CN102211341B (zh) * 2011-04-21 2014-10-01 牡丹江木工机械（厂）有限责任公司 干燥段和冷却段网带独立的网带式薄木干燥机
DE102014107728A1 (de) * 2014-06-02 2015-12-03 Ralf Pollmeier Furniertrocknungsverfahren
CN107999350A (zh) * 2017-12-20 2018-05-08 浙江可信竹木有限公司 一种竹帘烘干机构
CN108870940A (zh) * 2018-07-27 2018-11-23 山东天迈智能装备有限公司 一种木皮烘干机
CN112964035B (zh) * 2021-02-23 2022-07-12 安徽慕曼德家具有限公司 一种节能型实木板烘干装置及其烘干工艺
CN113803967B (zh) * 2021-08-31 2022-08-02 江苏文泰节能新材料有限公司 一种高强度内墙板用层压式烘干机
CN115682686A (zh) * 2022-08-30 2023-02-03 上海米开罗那机电技术有限公司 一种锂电池真空烘烤隧道炉
CN116123849A (zh) * 2023-02-09 2023-05-16 福建省时代天和实业有限公司 一种无纺布纸尿裤生产用整平烘干装置及其制作方法

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Also Published As

Publication number Publication date
TW469337B (en) 2001-12-21
ES2220418T3 (es) 2004-12-16
BR0008864A (pt) 2002-02-13
PT1161647E (pt) 2004-09-30
CA2371552C (fr) 2005-07-05
JP2002538987A (ja) 2002-11-19
JP3754894B2 (ja) 2006-03-15
DE19910832C1 (de) 2000-04-27
ATE266182T1 (de) 2004-05-15
DE50006335D1 (de) 2004-06-09
DK1161647T3 (da) 2004-09-13
EP1161647A1 (fr) 2001-12-12
US6581300B1 (en) 2003-06-24
WO2000053984A1 (fr) 2000-09-14
CA2371552A1 (fr) 2000-09-14

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