WO2005054765A1 - Procede et appareil de sechage de bois d'oeuvre - Google Patents

Procede et appareil de sechage de bois d'oeuvre Download PDF

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Publication number
WO2005054765A1
WO2005054765A1 PCT/AU2004/001719 AU2004001719W WO2005054765A1 WO 2005054765 A1 WO2005054765 A1 WO 2005054765A1 AU 2004001719 W AU2004001719 W AU 2004001719W WO 2005054765 A1 WO2005054765 A1 WO 2005054765A1
Authority
WO
WIPO (PCT)
Prior art keywords
stack
stickers
sticker
timber
band
Prior art date
Application number
PCT/AU2004/001719
Other languages
English (en)
Inventor
Edwin Lewis William Block
Original Assignee
Anlew & George Pty Ltd
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
Priority claimed from AU2003906764A external-priority patent/AU2003906764A0/en
Application filed by Anlew & George Pty Ltd filed Critical Anlew & George Pty Ltd
Priority to AU2004294468A priority Critical patent/AU2004294468A1/en
Publication of WO2005054765A1 publication Critical patent/WO2005054765A1/fr

Links

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
    • F26B25/06—Chambers, containers, or receptacles
    • F26B25/14—Chambers, containers, receptacles of simple construction
    • F26B25/18—Chambers, containers, receptacles of simple construction mainly open, e.g. dish, tray, pan, rack
    • F26B25/185—Spacers; Elements for supporting the goods to be dried, i.e. positioned in-between the goods to build a ventilated stack
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B9/00—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards
    • F26B9/04—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards in presses or clamping devices
    • 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
    • F26B2210/16—Wood, e.g. lumber, timber

Definitions

  • the present invention relates to a timber drying method and apparatus.
  • the invention seeks to provide an alternative method and apparatus for drying timber.
  • a method for drying timber including: arranging a stack of timber pieces on a frame in rows separated by stickers, such that air-flow channels are defined by the stickers, between adjacent rows, whereby the flow channels are oriented toward vertical.
  • a first row of the timber pieces is stacked on a first leg of the frame, which is angled toward vertical, in a first condition.
  • the frame is pivotable to move the stack between the first condition and a second condition wherein the flow channels are substantially horizontal. More preferably, the frame is pivoted to a third condition, wherein the flow channels are substantially vertical.
  • the stickers have a lateral flange and the method includes placing the stickers between adjacent rows of timber pieces by engaging the flange of each sticker with an associated timber piece so as to support the stickers at desired locations across one of the rows, and stacking the adjacent row on top of the so located stickers.
  • the method includes positioning the stickers using a mechanical applicator, which delivers each sticker to the stack by vertically aligning the sticker at a respective desired location and releasing the sticker to slide down the row of timber pieces until the flange engages with the associated timber piece to thereby position the sticker at the desired location.
  • a mechanical applicator which delivers each sticker to the stack by vertically aligning the sticker at a respective desired location and releasing the sticker to slide down the row of timber pieces until the flange engages with the associated timber piece to thereby position the sticker at the desired location.
  • the method includes passing at least one band around the stack and tensioning the band to apply a compressive load to the stack.
  • the method includes applying tension to the stack using a ram.
  • the method includes placing inserts between the stack and the at least one band to distribute the compressive load about a periphery of the stack.
  • the inserts serve to space the at leat one band from the corners of the stack.
  • the method includes introducing the stack into a kiln, with the flow channels in a vertical orientation.
  • an apparatus for use in the above-described method including a pivotable stripping frame.
  • a sticker with a lateral flange for placement between rows of timber pieces, the flange being adapted to engage an associated timber piece, to support the sticker at a desired location relative to one of the rows.
  • the flange is integrally formed with a cap fastened at one end of the sticker.
  • an applicator for positioning a sticker, as described above, onto a row of timber pieces, the applicator having a guide for delivering the sticker to a desired location and a feeder for holding a plurality of stickers and passing individual stickers to the guide, wherein the applicator is arranged to sequentially release the stickers at an elevated position relative to the row such that the stickers slide down the row of timber pieces until a flange of the respective sticker engages an associated timber piece, to thereby position the sticker at a desired location.
  • a tensioning structure for applying a compressive load to a stack of timber pieces, the structure including at least one band extending around the stack and inserts placed between the stack and the at least one band to distribute the compressive load about a periphery of the stack.
  • the tensioning structure includes tension springs coupled to the at least one band. More preferably, the tensioning structure includes a ram, which is preferably an hydraulic ram.
  • a kiln for use in the above-described method, with air-distribution ducts at a floor thereof, an impellor in a ceiling vent, return ducting for circulating air from the vent back to the distribution ducts, and coils for dehumidifying air passing through the ducting.
  • the kiln includes inlets for introducing fresh air and/or humidity control.
  • Figure 1 is a schematic representation, showing pre-treatment of timber pieces
  • Figure 2a is a perspective view illustrating a stripping procedure
  • Figure 2b is a partial enlargement of an end of a stripping frame, as shown in Figure 2a;
  • Figure 3 is a perspective view of an end of a sticker;
  • Figure 4 illustrates an alternative sticker construction;
  • Figure 5 is a diagrammatic perspective view showing use of a mechanised applicator in a stripping procedure
  • Figure 6 is an enlarged view of the applicator shown in Figure 5;
  • Figure 7 is an end view of the stripping frame of Figure 5, in a second condition;
  • Figure 8 is a perspective view of a stripped stack, with tensioning structure fitted thereto;
  • Figure 9 illustrates compressive force applied by the tensioning structure
  • Figure 10 is a partial-perspective view illustrating the tensioning structure of Figure 9;
  • Figure 11 is an end view of an alternative tensioning structure
  • Figure 12 is a partial-perspective view of the stack of Figure 8, illustrating a treatment procedure
  • Figure 13 is a schematic-perspective view showing a kiln for drying timber; and Figure 14 is a diagrammatic view of an alternative kiln construction.
  • a selection of timber pieces 1 are subject to immersion in a pre-treatment bath 2, in order to mitigate possible degradation affects to which the surfaces and ends of the timber pieces may be exposed during later seasoning of the timber.
  • the timber pieces 1 are then transferred onto a pivotal-stripping frame 3 which is rotatably mounted on a stand 4.
  • the frame includes a first leg 5 and a second leg 6 which are capable of rotating through 90° so that the first leg 5 can move from a horizontal position into a vertical position.
  • the leg 5 is angled at about 20° degrees to the vertical, in order that the timber pieces may be conveniently stacked thereon.
  • a first row 7 of timber pieces 1 is placed on the leg 5, so that each of the pieces are in direct side-by-side abutting relation.
  • Stickers 10 are then placed on top of the first row 7, in transverse relation, and a second row 8 of timber pieces is then stacked on top thereof.
  • the stickers serve to space adjacent rows 6, 7 and define air-flow channels 9 therebetween.
  • Each sticker 10 is formed of an elongate timber stake 11 with a cap 12 secured at an end 13 thereof.
  • the cap has an integral flange 14 for engaging an associated uppermost timber piece 15 of each row.
  • FIG. 4 An alternative sticker construction is shown in Figure 4, where like parts are denoted with like reference numerals.
  • the sticker 11 of Figure 4 is generally similar to that of Figure 3, with the exception that cap 12 is replaced by a wire 43, which is mounted to the end 13 by virtue of free ends 44 being received in recesses 45.
  • a central portion 46 of the wire 43 forais the flange 14.
  • the stickers 10 may be positioned on the various rows using a mechanised applicator 20, which includes a guide 21 and a feeder 22 for feeding individual stickers into the guide 21.
  • the feeder 22 itself may include a cartridge 23, which holds a plurality of stickers 10, and includes a spring-loaded follower 24 for urging the stickers 10 toward the guide 21.
  • the applicator 20 also includes a positioning foot 25, to locate the guide 21 at an appropriate position relative to the row of timber pieces
  • individual stickers are released from the applicator 20, at an elevated position relative to a row of timber pieces such that the sticker slides across the timber pieces until the flange 14 engages with an associated uppermost timber piece 15 in order to locate the sticker at a desired location.
  • the frame 3 may be rotated from the first condition shown in Figure 2, to a second condition, as shown in Figure 7, so that the flow channels 9 of the resultant stack 50 are orientated horizontally, for conventional processing. Additionally, a tensioning structure 30 may be fitted around the stack 50. The tensioning structure 30 may also be fitted so that the frame 3 may be tilted in a clock- wise direction, as viewed in Figure 2, to a third condition, where the second leg 6 is in a horizontal position and the first leg 5 is in a vertical position, in order that the flow channels 9 of the stack 50 adopt a substantially vertical configuration.
  • the tensioning structure 30 includes a plurality of bands 31 which are passed around the stack 50 and tensioned to impart a compressive force to the timber pieces. Inserts 32 may also be provided to distribute the force about the periphery of the stack and, in particular, to avoid any contact between the bands and the corners 33 of the stack. As can be seen from Figure 9, the compressive force results in induced radial force being applied to the stack. The stack 50 may then be lifted from the stripping frame and transferred on to supports 34, as shown in Figure 8, for seasoning or, alternatively, transferred directly onto a kiln trolley. In order to accommodate expansion and contraction pressures during drying, the tensioning structure 30 preferably includes a series of springs 35 coupled to the bands 31 as illustrated in Figure 10. Further, the inserts 32 may include runners or direction guides 36 to accommodate movement of the band during tensioning or as a result of volumetric changes of the stack 50 itself.
  • the tensioning process may include firstly pre- tensioning the stack 50 using hydraulic rams 47, as shown in Figure 11.
  • the rams 47 may be used by themselves, without the bands 31 , for the purpose of imparting suitable tension to the stack 50.
  • the rams need not necessarily be hydraulic and any suitable means, such as mechanical means, may be used to activate the rams.
  • a water soluble sealing/adhesive may be applied by way of a nozzle 40, when the stack 50 is being prepared for pre-kiln seasoning.
  • the ends 41 of the stack may then be sealed over with a temperature tolerant film material such as an aluminium-foil sheet 42.
  • the stack 50 is transferred onto a kiln trolley 49, as shown in Figure 13, and introduced to the kiln 51.
  • the kiln includes air-distribution ducts 52 in a floor 53, an impellor 54 in a ceiling vent 55 and return ducting 56 for circulating air back to the distribution ducts.
  • Heating coils 57 are provided in the ducting for dehumidifying air transferred back to the distribution ducts.
  • the kiln may also include louvres 58 which act as inlets for introducing fresh air and/or humidity control.
  • the vertical flow channels 9 within the stack 50 allow for substantially uniform drying of the timber pieces, since the natural convection direction for hot air within the kiln is up toward the vent 55. Accordingly, it is expected that kiln drying utilising vertically orientated flow channels will provide a faster and more uniform drying of timber pieces as compared to a conventional stack of timber pieces with flow channels arranged in a horizontal direction. Further, it is anticipated that the timber pieces in the stack will be able to be dried relatively quickly in a pre-kiln drying process, where the stack is left in an outdoor environment, due to the vertical orientation of the airflow passages, for similar reasons, as compared to a conventional stack with horizontal flow passages, where circulation between adjacent rows of timber pieces would be minimal. In addition, the use of a tensioning structure, as described above, is expected to provide superior results for the overall drying process since it provides active resistance to the timber pieces warping, bowing or twisting, which may otherwise result if only a conventional weight restraint were used.
  • Figure 14 illustrates an alternative kiln 51, where like reference numerals are used to denote like parts.
  • the kiln 51 of Figure 14 is of generally the same construction as that shown in Figure 13 except the airflow is reversed, with hot air being forced by fan 59 through an inlet 60.
  • the reversed air flow is preferred since any moisture extracted from the stack 50 is more readily removed in a gravitational direction.

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)

Abstract

L'invention concerne un procédé de séchage de bois d'oeuvre, consistant à disposer une pile de pièces de bois d'oeuvre (1) sur un châssis (3), en rangées séparées par des lattes d'espacement (10), de telle façon que des canaux de circulation d'air (9) soient définis par lesdites lattes d'espacement (10), entre des rangées adjacentes, de sorte que les canaux de circulation (9) soient orientés en direction verticale.
PCT/AU2004/001719 2003-12-05 2004-12-06 Procede et appareil de sechage de bois d'oeuvre WO2005054765A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2004294468A AU2004294468A1 (en) 2003-12-05 2004-12-06 Timber drying method and apparatus

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU2003906764 2003-12-05
AU2003906764A AU2003906764A0 (en) 2003-12-05 Timber drying method and apparatus

Publications (1)

Publication Number Publication Date
WO2005054765A1 true WO2005054765A1 (fr) 2005-06-16

Family

ID=34637703

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU2004/001719 WO2005054765A1 (fr) 2003-12-05 2004-12-06 Procede et appareil de sechage de bois d'oeuvre

Country Status (1)

Country Link
WO (1) WO2005054765A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1826517A1 (fr) * 2006-02-28 2007-08-29 Ibiden Co., Ltd. Support de séchage, procédé de séchage d'un corps moulé en nid d'abeilles, et procédé pour la fabrication d'un corps à structure en nid d'abeilles
WO2009021472A2 (fr) 2007-08-13 2009-02-19 Vojtasik Radovan Procédé de séchage de bois de sciage et dispositif d'utilisation
CN113043442A (zh) * 2021-03-20 2021-06-29 胡旭 一种模块化建筑墙体加工系统及加工方法

Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4189851A (en) * 1978-03-20 1980-02-26 Weyerhaeuser Company Unloading apparatus for multi-opening work station
US4250629A (en) * 1979-02-21 1981-02-17 Lewis Donald C Lumber conditioning kiln
US5263812A (en) * 1991-07-22 1993-11-23 Bowlin William P Automatic stick laying apparatus
EP0592752A1 (fr) * 1992-10-16 1994-04-20 Vincenzo Pagnozzi Appareil et procédé pour le séchage de feuilles de bois obtenues par tranchage, découpage rotatif ou analogue
US5704134A (en) * 1995-10-16 1998-01-06 Carter Sprague Inc. Trim block drying rack and method
US6048164A (en) * 1999-03-26 2000-04-11 U.S. Natural Resources, Inc. Sticker placement apparatus
US6134803A (en) * 1999-09-14 2000-10-24 Gilchrist; Maurice H. Flexible wood sticker
CA2307464A1 (fr) * 1999-04-29 2000-10-29 Timothy Byman Espaceur de bois d'oeuvre en plastique ou bande d'empilage
CA2272197A1 (fr) * 1999-05-19 2000-11-19 Industries Bois Ditton Inc. Separateur pour l'empilage du bois d'oeuvre
CA2307699A1 (fr) * 1999-05-19 2000-11-19 Richard Pilon Separateur pour empilage de bois d'oeuvre
WO2000072721A1 (fr) * 1999-05-27 2000-12-07 Seb S.A. Bande depilatoire
WO2001001056A1 (fr) * 1999-06-25 2001-01-04 The Regents Of The University Of California Baguette speciale et procede de detection d'emission acoustique ou de transmission ultrasonore pendant le sechage de sciage
CA2289304A1 (fr) * 1999-08-19 2001-02-19 U.S. Natural Resources, Inc. Mecanisme de transfert d'autocollants pour empileur de bois d'oeuvre
CA2356584A1 (fr) * 2001-09-04 2003-03-04 Industries P.H.L. Inc. Etiqueteuse-positionneuse

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4189851A (en) * 1978-03-20 1980-02-26 Weyerhaeuser Company Unloading apparatus for multi-opening work station
US4250629A (en) * 1979-02-21 1981-02-17 Lewis Donald C Lumber conditioning kiln
US5263812A (en) * 1991-07-22 1993-11-23 Bowlin William P Automatic stick laying apparatus
EP0592752A1 (fr) * 1992-10-16 1994-04-20 Vincenzo Pagnozzi Appareil et procédé pour le séchage de feuilles de bois obtenues par tranchage, découpage rotatif ou analogue
US5704134A (en) * 1995-10-16 1998-01-06 Carter Sprague Inc. Trim block drying rack and method
US6048164A (en) * 1999-03-26 2000-04-11 U.S. Natural Resources, Inc. Sticker placement apparatus
CA2307464A1 (fr) * 1999-04-29 2000-10-29 Timothy Byman Espaceur de bois d'oeuvre en plastique ou bande d'empilage
CA2307699A1 (fr) * 1999-05-19 2000-11-19 Richard Pilon Separateur pour empilage de bois d'oeuvre
CA2272197A1 (fr) * 1999-05-19 2000-11-19 Industries Bois Ditton Inc. Separateur pour l'empilage du bois d'oeuvre
WO2000072721A1 (fr) * 1999-05-27 2000-12-07 Seb S.A. Bande depilatoire
WO2001001056A1 (fr) * 1999-06-25 2001-01-04 The Regents Of The University Of California Baguette speciale et procede de detection d'emission acoustique ou de transmission ultrasonore pendant le sechage de sciage
CA2289304A1 (fr) * 1999-08-19 2001-02-19 U.S. Natural Resources, Inc. Mecanisme de transfert d'autocollants pour empileur de bois d'oeuvre
US6134803A (en) * 1999-09-14 2000-10-24 Gilchrist; Maurice H. Flexible wood sticker
CA2356584A1 (fr) * 2001-09-04 2003-03-04 Industries P.H.L. Inc. Etiqueteuse-positionneuse

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1826517A1 (fr) * 2006-02-28 2007-08-29 Ibiden Co., Ltd. Support de séchage, procédé de séchage d'un corps moulé en nid d'abeilles, et procédé pour la fabrication d'un corps à structure en nid d'abeilles
US7842227B2 (en) 2006-02-28 2010-11-30 Ibiden Co., Ltd. Drying jig, drying method of honeycomb molded body, and manufacturing method of honeycomb structured body
WO2009021472A2 (fr) 2007-08-13 2009-02-19 Vojtasik Radovan Procédé de séchage de bois de sciage et dispositif d'utilisation
WO2009021472A3 (fr) * 2007-08-13 2009-06-25 Radovan Vojtasik Procédé de séchage de bois de sciage et dispositif d'utilisation
CN113043442A (zh) * 2021-03-20 2021-06-29 胡旭 一种模块化建筑墙体加工系统及加工方法

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