EP2195594B1 - Device for sawn timber drying - Google Patents

Device for sawn timber drying Download PDF

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Publication number
EP2195594B1
EP2195594B1 EP08784166.4A EP08784166A EP2195594B1 EP 2195594 B1 EP2195594 B1 EP 2195594B1 EP 08784166 A EP08784166 A EP 08784166A EP 2195594 B1 EP2195594 B1 EP 2195594B1
Authority
EP
European Patent Office
Prior art keywords
piling
sawn timber
sticks
arresting
drying
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP08784166.4A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2195594A2 (en
Inventor
Radovan Vojtasík
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.)
Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP2195594A2 publication Critical patent/EP2195594A2/en
Application granted granted Critical
Publication of EP2195594B1 publication Critical patent/EP2195594B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • 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
    • 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
    • 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 invention relates to the field of woodworking industry. A new device for drying of sawn timber is resolved.
  • the device according to the invention is suitable especially for drying of sawn timber in chocks.
  • sawn timber is meant the wood after cutting to pieces, which is in a form of so called trimmed sawn timber or non-trimmed sawn timber after primary treatment by the way of cutting to pieces or which is in a form of lamellas, balks, veneer and the like.
  • Sawn timber drying depends particularly on temperature, moisture and provision of flow of medium serving for a discharge of moisture during drying.
  • Sawn timber drying is commenced by cutting the original material to pieces in fact when it is under progress in common surrounding under natural conditions.
  • the industrial devices for drying are implemented by the way of drying in chambers or in other determined rooms.
  • the sawn timber is dried in a form of individual pieces or in most cases in a form of so called chocks which are the systems where the sawn timber is laid loose in layers one above another and individual layers are interlaid by so called piling sticks.
  • Each layer of sawn timber creates an areal flat formation and there are gaps created among them by the means of so called piling sticks which gaps serve for circulation of medium which draws discharged moisture off.
  • the bodies of simple form for example lathes, balks, boards and similar simple items which allow creation of gaps among individual layers of the sawn timber are used as piling sticks.
  • the processes of drying are constantly forwarded and improved.
  • the drying processes are known from number of documents.
  • the methods of drying as well as methods serving for forwarding and improvement of drying are focused on physically-chemical influence on the sawn timber.
  • the disadvantage of existing sawn timber drying devices is the fact that they do not solve the problem of undesirable breaks in fibres and of warping of form of the sawn timber during drying fully and sufficiently from the point of view of economy.
  • the problem arises in such a way that the dimensions of sawn timber are lessened by drying which results in a creation of breaks in the wood and in creation of cracks and gaps among individual pieces of the sawn timber in the layers of chock. That is to say the decreasing of the dimensions induces tension and movement of material while cracks and gaps arising concurrently among individual pieces of material facilitate warping and breaking and they even help to the fixation of arisen breaks and deformations. Because usually the sawn timber is laid loose in chocks, the piling sticks among the layers of sawn timber cannot prevent undesirable mentioned effects of drying.
  • the device of sawn timber drying with the exploitation of creation of certain pressure in a drying room is described in application WO 1999/023429 ( PCT/FR 1998/002318 ).
  • a sealed chamber is pressured to the pressure determined in advance by the way of injecting or by the way of generating saturated vapour and in maintaining such pressure for a predetermined time interval at concurrent conservation of forced circulation of air and saturated vapour in the chamber.
  • heating the wood core by emitting of microwaves and drawing off the liquid exudates coming down from the wood to the chamber base where they are collected is implemented.
  • the device according to WO 1999/023429 contains a chamber interconnected with waveguide by the means of windows and equipped with elements serving for creation and preservation of the stated physically-chemical processes in the cavity of chamber.
  • the spring instrument is situated outside the chock.
  • the corner stone of most of the found documents is to clamp pieces of sawn timber together during a drying by a device that no undesirable contort affects the sawn timber. All the devices in the found documents are arranged in such a way that they are only able to apply pressure broadly on the whole sides of a chock. In such a case, even if a piston, spring or other device is used, the clamping is only general.
  • the invention removes all the above stated disadvantages to a considerable extent.
  • the device according to the invention is suitable for sawn timber drying.
  • the device for sawn timber drying in chocks is of the type in which sawn timber layers are placed and create flat planar formations, and these layers being interlaid with parallel rows of piling sticks.
  • the device comprises:
  • the movable arresting stop is preferably provided with at least one setting element serving for preservation of its position in stretched conditions.
  • the screw, pin or any other common setting element may be used as a setting element which will allows a temporary fixation of the position of the movable arresting stop in stretched conditions in such a way for the piling stick to be able to be put on the sawn timber or for the sawn timber to be piled on the piling stick according to the invention. Then the sawn timber is drawn together by the move of movable arresting stop in the direction to the opposite arresting stop by a simple release of setting element.
  • Each movable arresting stop is attached to the force element.
  • the solution with two arresting stops when both of them may be movable is advantageous especially at larger dimensions.
  • the number of arresting stops higher than two may be advantageous for large dimensions, for example there may be an immovable arresting stop found between movable arresting stops and the like. This version of solution is suitable especially at larger dimensions, when the piling sticks are longer then usually.
  • the piling sticks may be preferably created as rods of tetragonal cross-section which rods are provided with arresting stops in the form of bodies which are also of the shape of rod and which have also tetragonal cross-section.
  • This version is especially advantageous for its practicality and simplicity of workmanship however it does not limit a possibility to execute other shapes according to the intention and possibilities of manufacturer anyhow.
  • the piling sticks that are located above each other are interconnected with each other.
  • the device with the interconnected piling sticks can exist like the ever-ready unit suitable for inserting or replacing of particular pieces the sawn timber.
  • the interconnection of at least some piling sticks is detachable, by means of connecting elements for a detachable connection.
  • So attachment of the piling sticks the ones which do not create a fixed block with an attachment by welded bar or another practical block, is preferably executed as a unit which may be disassembled by the means of connecting elements of the demountable unit as for example bolts with nuts, clips, clamps and the like.
  • the chocks with sawn timber are preferably provided with at least another pressure element located on the surface of the body which is created by the chock as a modular unit, namely in functional position to induce a pressure on the chock perpendicularly towards the direction of movement of arresting stops.
  • This may be implemented easily, for example by the means of weights or pistons and rods and so on.
  • the chock may be also provided with other additional piling sticks which are of the same structure with the arresting stops as the piling sticks incorporated in the chock, they are also situated parallelly against each other however along the lateral sides of the layers of sawn timber, perpendicularly to the piling sticks lying on planar surfaces of these layers.
  • These additional piling sticks are then provided with arresting stops and with force elements but the pressure areas of arresting stops of these additional piling sticks are propped on the upper and lower wall of the chock.
  • the invention is useable for sawn timber drying, namely both of individual pieces and also of the sawn timber in layers or in chocks. It is suitable for drying of various kinds of sawn timber as for example veneer, lamellas, sawn timber with bark and/or bast, as for example sawn timber from frame-saw as well as sawn timber free of bark as for example floorboards, boards, lathes, balks and others. It is suitable for drying in natural way in a common surrounding of terrain or of halls and also for methods of drying with utilization of drying halls, chambers or tunnels with the use of artificially crated conditions for drying as for example influence of heat, air circulation, decrease or increase of pressure, influence of microwaves, UV radiation and the like.
  • the advantage of the new technical solution according to the invention is represented also by its undemanding character for energy with a possibility to combine the new device with another drying device and methods additionally within a common process and in one period of time.
  • Another advantage is represented by the possibility of its utilization in the field or in free environment, the possibility of the proposed device to be disassembled, its storability as well as a possibility of transport to any place as well as undemanding character for space.
  • FIG. 1 view of the example device according to the invention with one dried layer of sawn timber from the top
  • Fig. 2 view of the same from the front, meaning upon previous picture
  • Fig. 3 view of the same from the right side, meaning upon previous two pictures.
  • Fig. 4 the same view of the device like Fig.2 but with a chock of sawn timber provided with the pressure elements.
  • An example of embodiment of the invention is the device for sawn timber drying according to Figures 1 to 4 .
  • the drying device which includes also dried sawn timber 1 for clearness is demonstrated.
  • the device is created in a modular way out of bodies from the connected pairs of piling sticks 2 which are distributed parallelly partly on the bottom, under the dried sawn timber 1 and partly on the dried sawn timber 1 .
  • the chosen section contains two bodies from connected pairs of piling sticks 2 which are situated above each other. Both these bodies containing a pair of piling sticks 2 are constructed in the same way. First of them is the upper body with a pair of piling sticks 2 lying on the sawn timber 1 on the top and the other one is found under this first one.
  • the piling sticks 2 themselves are of the shape and of dimensions which are known in the branch, suitable for adding to the surface of dried sawn timber 1. They are created as oblong bodies made of steel with flat thrust faces 3 for propping of the dried sawn timber 1 which thrust faces 3 are located on the body of the piling stick 2 from the opposite sides.
  • the ends of piling sticks 2 are welded on the fixed plates which create fixed couplers among them this way and it allows the piling sticks 2 to be fixed side by side in each pair firmly, non-demountable way.
  • One of these plates, in Fig. 1 and Fig. 2 on the right, is at once the fixed immovable arresting stop 4 for the laid sawn timber 1.
  • the movable arresting stop 5 found in the area of opposite ends of each pair of interconnected piling sticks 2 which arresting stop is movable towards the pair of connected piling sticks 2 .
  • the difference in the position of movable arresting stop 5 of the upper pair of piling sticks 2 is well apparent in the pictures Fig. 1 and 2 at the stretched position of the device when compared with the position of the movable arresting stop 5 of the bottom pair of the piling sticks 2 where there is a sawn timber 1 included.
  • the movable arresting stop 5 is provided with a spring 6 for its forcing down in the direction to the other one of this pair of arresting stops 4,5 which is to the immovable arresting stop 4.
  • Both arresting stops 4,5 have a lever pressure face 7 created on them for evocation a pressure power to the laid sawn timber 1 .
  • Pressure face 7 protrudes on the outside periphery of the piling stick 2 on its side where there is thrust face 3 found.
  • Both two arresting stops 4,5 are located on the same side of the piling stick 2, at the same thrust face 3 , and pressure faces 7 of these arresting stops 4,5 are located against each other.
  • each of the demonstrated pair of the piling sticks in the pictures Fig. 1 to Fig. 3 is an independent detachable body. It is possible and also practical due to this fact that each pair of firmly connected piling sticks 2 disposes of created common arresting stops 4,5 and in the gap 62 which means in the space between the piling sticks 2 there is a spring 6 found. This is stretched between the arresting stops 4,5, where it is fixed to the movable arresting stop 5 by one end and to the immovable arresting stop 4 by the other end.
  • the movable arresting stop 5 is provided with the bolt with nut in the position of setting element 8 for keeping its position in stretched conditions, which allows an easy storage of damp sawn timber 1 .
  • the piling sticks 2 are created in a simple practical shape as rods of the tetragonal cross-section and they are provided with arresting stops 4,5 in the form of plates which are also of the shape of a rod and of tetragonal cross-section.
  • the bodies of the pairs of the connected piling sticks 2 are laid for drying on the sawn timber 1 side by side, crosswise towards the sawn timber 1.
  • Fig. 1 and Fig. 2 there are other screws apparent which screws are found at the fixed couplers of the piling sticks 2 . They create fixation mandrels 9 which allow a fixation of piling sticks 2 found one above another in combination with openings 10 in fixed couplers of the piling sticks 2 .
  • All the set is modularly built up in such a way that the pairs of piling sticks 2 with arresting stops 4,5 in stretched conditions are placed side by side on the bottom. Then there is a layer of sawn timber 1 laid down on the piling sticks 2 crosswise towards them. The sawn timber 1 has to be piled side by side. When the entire layer is laid down, another layer of pairs of piling sticks 2 is laid down on the top of the sawn timber 1. These pairs of piling sticks 2 are connected to the pairs of piling sticks 2 beneath. Then there are setting elements 8 released which release disengages springs 6 in the shape of spring which will cause that the movable arresting stops 5 will be forced down on the layer of sawn timber 1 and they start to induce a pressure power towards immovable arresting stops 4 . This will put the device into operative conditions and it allows using of the best method of drying of sawn timber 1 .
  • the pressure power is induced by the force element in the form of spring 6 , which causes that the movable arresting stop 5 forces to a layer of the sawn timber 1 down in the direction to the immovable arresting stop 4 , whereby the layer of sawn timber 1 is pushed down and individual pieces of sawn timber 1 are pressed to each other.
  • the showed device according to the invention contains rows of bodies with pairs of piling sticks 2 with being free space along those surfaces of the sawn timber 1 where there are piling sticks 2 found. That makes the possibility to discharge a moisture there through this free space from the sawn timber 1 drawn off 1 during drying.
  • the device for drying of sawn timber 1 according to the pictures Fig. 1 to Fig.
  • the device according to the invention makes the possibility that there is a drying implemented while during the drying a pressure force induced by the springs is induced on the lateral surfaces of this layer in opposite direction and at the same time in the direction of the course of planar surface areas of the layer. Such influence may be under progress continuously or interruptedly, for example in a way of pulses, for a certain period of time.
  • the pressure power at it is induced in the intensity which is at least sufficient to force the adjacent pieces of sawn timber 1 down to each other and to keep them side by side as close as possible even after reduction of volume caused by the dry shrinkage of the wood substance without creation of vacancies if possible.
  • the bodies with the connected piling sticks 2 can be disassembled after exsiccation and they are suitable to be put at suitable place or they can be directly relocated on the new damp sawn timber 1 for other utilization while dried sawn timber 1 is passed on other treatment or sale. It is purposeful to leave the device common with the sawn timber 1 as long as possible.
  • the device also may exist like a complete built-up unit in which the sawn timber 1 can be removable.
  • Fig.4 shows the possibility of using the pressure elements 11 in the form of pistons to apply the pressure perpendicularly towards the direction of the movement of the arresting stops (4,5). They may be used alternatively to the create fixation mandrels 9 or additionally.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
  • Drying Of Solid Materials (AREA)
  • Manufacture Of Wood Veneers (AREA)
EP08784166.4A 2007-08-13 2008-07-24 Device for sawn timber drying Not-in-force EP2195594B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CZ20070539A CZ303305B6 (cs) 2007-08-13 2007-08-13 Zpusob sušení reziva a zarízení k provádení tohoto zpusobu
PCT/CZ2008/000088 WO2009021472A2 (en) 2007-08-13 2008-07-24 Method of saw timber drying and device for its using

Publications (2)

Publication Number Publication Date
EP2195594A2 EP2195594A2 (en) 2010-06-16
EP2195594B1 true EP2195594B1 (en) 2014-08-06

Family

ID=40351213

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08784166.4A Not-in-force EP2195594B1 (en) 2007-08-13 2008-07-24 Device for sawn timber drying

Country Status (3)

Country Link
EP (1) EP2195594B1 (cs)
CZ (1) CZ303305B6 (cs)
WO (1) WO2009021472A2 (cs)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2541605C2 (ru) * 2011-01-28 2015-02-20 Александр Павлович Васильев Зажимное устройство
CZ307833B6 (cs) * 2016-04-14 2019-06-12 SAVERBRIK - závod beta s.r.o. Postup výroby pelet, briket a dalších výrobků určených ke spalování
CN109341218A (zh) * 2018-09-29 2019-02-15 柳州市恒茂木业有限公司 一种木业板材风热烘干装置

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1576271A (en) * 1924-02-27 1926-03-09 Victor G Gilbreath Lumber bunk
US3283412A (en) * 1964-09-09 1966-11-08 Frederick R Furth Process and apparatus for drying and treating lumber
SE423931B (sv) * 1980-10-15 1982-06-14 Nils Oskar Tore Loof Sett att torka treprodukter
AU547879B2 (en) 1980-11-14 1985-11-07 Mikrovagsapplikation (Mva) A.B. A method of carrying out the drying of wooden objects
CH656653A5 (de) * 1981-08-06 1986-07-15 Kannegiesser H Gmbh Co Verfahren und vorrichtung zum entwaessern gewaschener waeschestuecke.
FR2770441B1 (fr) * 1997-10-30 2000-02-11 Bernard Dedieu Procede de sechage des bois de sciage et dispositif permettant la mise en oeuvre du procede
WO2005050476A1 (en) 2003-10-29 2005-06-02 Sap Ag Sytems and methods for searching and displaying reports
WO2005054765A1 (en) * 2003-12-05 2005-06-16 Anlew & George Pty Ltd Timber drying method and apparatus
US7987614B2 (en) * 2004-04-12 2011-08-02 Erickson Robert W Restraining device for reducing warp in lumber during drying
JP2007021825A (ja) * 2005-07-14 2007-02-01 Chisho Juken Kk 木粉又は木屑に対する乾燥方法及び乾燥装置

Also Published As

Publication number Publication date
WO2009021472A4 (en) 2009-08-27
CZ303305B6 (cs) 2012-07-25
CZ2007539A3 (cs) 2009-02-25
WO2009021472A2 (en) 2009-02-19
WO2009021472A3 (en) 2009-06-25
WO2009021472A9 (en) 2009-10-15
EP2195594A2 (en) 2010-06-16

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