EP0688260B1 - Verfahren zur herstellung von hart gepresstem holz - Google Patents

Verfahren zur herstellung von hart gepresstem holz Download PDF

Info

Publication number
EP0688260B1
EP0688260B1 EP94909137A EP94909137A EP0688260B1 EP 0688260 B1 EP0688260 B1 EP 0688260B1 EP 94909137 A EP94909137 A EP 94909137A EP 94909137 A EP94909137 A EP 94909137A EP 0688260 B1 EP0688260 B1 EP 0688260B1
Authority
EP
European Patent Office
Prior art keywords
wood
piece
compressed
compression
heating
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
EP94909137A
Other languages
English (en)
French (fr)
Other versions
EP0688260A1 (de
Inventor
Jaakko Kause
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
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 FI931078A external-priority patent/FI92920C/fi
Priority claimed from FI931077A external-priority patent/FI92919C/fi
Application filed by Individual filed Critical Individual
Publication of EP0688260A1 publication Critical patent/EP0688260A1/de
Application granted granted Critical
Publication of EP0688260B1 publication Critical patent/EP0688260B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27M—WORKING OF WOOD NOT PROVIDED FOR IN SUBCLASSES B27B - B27L; MANUFACTURE OF SPECIFIC WOODEN ARTICLES
    • B27M1/00—Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching
    • B27M1/02—Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching by compressing

Definitions

  • the invention relates to a method for making wood having at least hard-pressed surface, in which method a piece of wood is compressed to a volume smaller than its original volume for increasing its density and hardness.
  • British Patent 1 426 555 discloses a solution, in which strips of wood or logs and adhesive are arranged in a mould, the intention being to press the adhesive into the wood material at the same time as it remains between the logs or strips adhering them to each other. Wood material and wood blanks compressed to shape are provided by this solution, but actual hard wood or wood having hard surface is not produced by means of this method, which additionally requires extra adhesive making it difficult to apply the method and increasing the costs.
  • U.S. Patent 4 606 388 describes a solution for compressing wood to hard wood material by impregnating it at first with ammonia to plasticize it, after which the wood is compressed several sequential times to provide a compression. Additionally, the wood must be dried separately at a temperature of less than 100 °C to remove the remaining water, which makes an application more difficult and increases the costs. Also in this solution, it is necessary to use an extra additive, i.e. ammonia.
  • U.S. Patent 4,469,156 discloses a solution, in which wood saturated with water is heated by microwave radiation and bent or formed into a desired shape while the material is still hot. After the forming, a separate drying takes place, at which the moisture is removed from the wood. It is not the purpose of the solution to produce hard wood, but only to shape it. Therefore, this invention has a purpose and a solution to a problem different from those of the present invention.
  • a weakness of the known solutions is that, through them, it is not possible to make sufficiently hard wood, either because the centre of the wood produced does not become hard enough or because the hardness and density of the surface portions of the wood material are not sufficient or deep enough. Further, by using them, it is not possible to produce wood material of equal quality, in which the wood hardness at the surface would be sufficient so that profiles or wood products having complicated cross-sections and being ready-shaped for a purpose of use could be provided simultaneously. By means of the known solutions, it is not possible either to provide bodies being ready-calibrated for the purpose of use and having surfaces formed into various shapes, because, using these solutions, it is impossible to provide a sufficiently equal plasticization of the wood material before the compression step.
  • An object of the present invention is to provide such a method of making compressed wood by which is effected a desired hardness to the heart of the wood, if necessary, so that the wood can be equally durable and hard along its entire cross-section.
  • a further object of this invention is to provide such a method of making compressed wood by which can be effected a desired compression of wood and compressed wood suitable for use as such, as far as its outer dimensions and cross-section are concerned, and dense and hard enough at its surface portions.
  • the method of the invention is defined in appendant claim 1.
  • a sufficiently moist piece of wood preferably saturated with a liquid is compressed to a desired compression ratio, which preferably takes place as a relatively rapid compression step, whereby substantially all the liquid can be removed from the piece of wood via the ends thereof.
  • the liquid contained in the wood provides an equal pressure in the whole piece of wood, which is a condition of that the compression can be accomplished equally through the whole piece of wood to the heart thereof.
  • the compression is preferably performed when the piece of wood is at normal ambient temperature and that the piece of wood is heated after the compression, still under the influence of compression, substantially entirely to a high temperature so that lignins, resins and other heat-plasticised materials contained in the wood material bind the fibres of the piece of wood tightly and densely together.
  • a piece of wood is compressed into a shape having predetermined cross-section and dimensions, whereby a surface layer of the piece of wood is densified as dense and hard as desired, while the heart may be formed either throughout hard or in a desired manner softer than the surface layer, depending on the purpose of use.
  • a piece of wood is heated before compression, for instance by conducting electric current through the piece of wood, through which the wood material can be heated securely and equally, while it can be heated up to 500 - 600 °C or even higher.
  • a preheating of wood material is avoided, if desired, because a compression, if performed rapidly enough, may be carried out by using wood at an ambient temperature above zero degrees.
  • a further advantage of the solution according to the invention is that wood can be compressed up to a compression ratio 1:2,5 or more, due to which it will be really compact and dense, while its strength and smoothness are considerably better than those of the known solutions.
  • the method according to the invention can be applied to a manufacture of products from wood for various purposes and with various hardnesses and densities as well as shapes, while any tree species, including alder, aspen and other tree species considered as soft, may be used for the manufacture.
  • round wood material or wood material roughly calibrated to various shapes may be used as the piece of wood to be compressed.
  • either rectangular, octagonal or round compressed hardwood pieces or hardwood pieces of nearly any shape can be produced by this method.
  • Still an advantage of the method is that the wood obtained is throughout undamaged and free from colour defects, which is an absolute condition especially for visible surface materials.
  • the wood can be made throughout equally soft and thus easily compressible and the compressible piece of wood can be curved or bent without breaking or fracturing when compressed, because it is elastic enough due to its softness.
  • An additional advantage of the invention is that nearly 100 % of the wood material can be used for various purposes, while a final product is obtained, which has a dimensioning and shape just suitable for the purpose of use.
  • an advantage of the method according to the invention is that various recesses and embeddings can be provided in the final product by suitably shaped jaws of a compressing equipment, for instance for fastening fittings and other accessories, due to which extra shapings or other working measures are not always needed.
  • a compact integral surface layer is needed, but a softer and less dense heart either for fastening or insulating reasons, it is possible to manufacture by the method of the invention pieces of wood of various kinds and shapes as well as with various densities of the heart portion.
  • a piece of wood manufactured according to the invention may also be coated or surface-treated in various manners known per se to achieve a desired appearance.
  • Figure 1 shows schematically a compressing equipment suitable for implementing the method of the invention, in which wood can be compressed continuously also without preheating the wood.
  • the compressing equipment comprises a compression table 1, above which there is a cover part 2. These form between themselves a treating channel 3, through which a compressed piece of wood is led after the compression in order to be heated and cooled.
  • the compressing equipment further comprises compression cylinders 4 and 5 mounted substantially perpendicularly to each other, the compression cylinder 4 being parallel to the compression table 1 and the compression cylinder 5 perpendicular thereto.
  • To piston rods of the compression cylinders 4 and 5 are fastened compression plates 6 and 7, by means of which the piece of wood is compressed.
  • the compressing equipment comprises intermediate beams 8; 8a, 8b necessary in a continuous-action compressing equipment to keep the compressed piece of wood in its compressed shape during the time it is treated after the compression.
  • the compressing equipment further comprises a proportioning table 9 and a guide plate 10 for raw wood.
  • a raw uncompressed piece of wood 11 having a moisture of at least about 12 %, but being preferably saturated with water in some situations is fed between the proportioning table 9 and the guide plate 10 on the compression table 1, with the piston of the cylinder 4 retracted, whereby the piece of wood 11 falls in front of it. Then the piece of wood 11 is pushed to the right in the figure, until it is under the cylinder 5. Subsequently, an intermediate beam 8a is positioned between the piece of wood 11 and the compression plate 6 of the cylinder 4. At this stage, the piece of wood 11 is preferably at normal room temperature, i.e. at ambient temperature, and there is no need to warm or heat it up.
  • the piece of wood 11 is compressed by means of the cylinders 4 and 5, due to which the liquid, mainly water, contained in the piece of wood 11 is squeezed out of the ends thereof, while substantially the same pressure prevails throughout the whole piece of wood 11.
  • the liquid, mainly water, contained in the piece of wood 11 is squeezed out of the ends thereof, while substantially the same pressure prevails throughout the whole piece of wood 11.
  • the wood material substantially emptied of water can be brought into a dense, compact and homogenic form.
  • the successive intermediate beams 8a and 8b are coupled to each other so that the compressed piece of wood 11 cannot expand substantially in the direction between the beams after the termination of the compression.
  • the compressed piece of wood 11a moves with them into the treating channel 3 between the compression table 1 and the cover part 2, in which channel it is heated at the same time as it maintains the volume to which it was initially compressed.
  • the heating may take place in various manners, e.g. in a manner to be described later by conducting an electric current through the wood, the temperature preferably being about 500 to 600 °C.
  • the compressed and heated piece of wood is allowed to cool e.g. by lowering stepwise the temperature of the compression table and the cover part in the direction of motion of the piece of wood, and subsequently, a final cooling is performed e.g.
  • This is illustrated schematically in Figure 1 by zones 1d and 2a to 2d indicated on the compression table 1 and the cover part 2, the zone 1a/2a being the hottest one and the temperature of the zone 1b/2b and 1c/2c sinking suitably by e.g. about 200 °C compared to the previous zone.
  • the zone 1d/2d again is a cooling zone, which can be cooled with water, for instance.
  • the intermediate beam on the right side thereof is released from the coupling to the intermediate beam on the left side thereof and the intermediate beam is recirculated to the compression end along a conveyor path 12 indicated by broken lines.
  • the compressed piece of wood in its final form falls into a receiving gap 13 or is forwarded in some other way known per se for further processing.
  • the treating channel may be adjusted for instance by means of an adjustable cover part, which means that for each treating channel 3 height must be used intermediate beams of the same height for maintaining the compressed piece of wood as desired during the whole treatment.
  • the intermediate beams 8 can be displaced from the end of the compressing equipment to the beginning thereof in many different ways by using equipments and methods known per se.
  • the successive intermediate beams may be coupled after the compression step by using suitable coupling means.
  • the compression cylinders 4 and 5 are preferably mounted in such a manner that they can be displaced in a direction transverse to their compression direction.
  • the compression point of the cylinders may then be set to move according to the midpoint of the piece of wood 11 so that the compression takes place, when the piece of wood is compressed and the midpoint moves both horizontally and vertically, all the time directly towards the midpoint from both directions.
  • the compressed piece of wood 11a can also be heated in different ways, as for instance by using a heated compression table and cover part, which heat the piece of wood starting from the surface. This is, however, a slow procedure and may also cause colour defects at the surface portion of the piece of wood, which is not appropriate for all purposes.
  • Hardness values measured for pieces of wood made by the method of the invention are shown by way of example in Figure 2 for various tree species compared to the original hardness values thereof.
  • the hardness is shown in the figure measured across the grain, on the one hand, and along the grain, on the other hand.
  • the hardness of the pieces of wood obtained by compression has increased considerably across the grain for all tree species, being nearly 3,5-fold at its best.
  • the hardness along the grain has increased as well to more than double for all tree species.
  • Figure 3 shows schematically tree hardnesses obtained by means of the invention compared to natural tree species known to be hard. As appears from the figure, across the grain hardnesses of spruce and pine compressed by the method are considerably greater than the respective strengths of natural oak, rosewood etc. Pine and spruce material obtained by means of the method can thus be used for purposes requiring very hard surface material, such as for floor coverings and the like. If the across the grain hardness values of alder respective aspen compressed by means of the method and shown in Figure 2 are compared, they can be found to show strength values corresponding to those of natural beech and teak.
  • Figure 4 compares the bending strength of pieces of wood produced by compressing by the method of the invention to the natural bending strength thereof, the figure showing clearly that the bending strength of spruce has risen to more than 2,5-fold at its best and to more than 1,5-fold at its worst.
  • the final result of the piece of wood is a compressed piece of wood having a throughout equal strength and hardness, which has not been possible to provide by the known solutions.
  • wood material being a little decayed at some place as well as knotty wood material may well be used for applying the method, since these weaknesses are eliminated by means of the method, because the knot and the resin material or another material around the knot are then compressed in a corresponding manner and become dense and hard, adhering undetachably to the remaining wood material.
  • so-called undesirable tree material can be used efficiently for a useful purpose, which up till now has required first-class wood material.
  • the raw wood quality improves and drying defects caused by normal wood drying are avoided.
  • raw wood material can be utilized efficiently, because the stages of operation before the compression are very few and raw wood material is thus wasted very little.
  • the method requires a substantially smaller amount of work for providing the final result than conventional sawing technique does.
  • FIG. 5 shows a schematic block diagram of another method of the invention, in which each step relating to the manufacture is indicated as a separate block.
  • a heating step 14 the ends of a compressible piece of wood are provided with electrodes, and then an electric current is conducted through the piece of wood so that the liquid contained in the wood and thus, through the liquid, the whole wood material is heated to a suitable softness.
  • the piece of wood has preferably the same cross-section along the whole length, i.e. its material volume is substantially the same at each cross-section point.
  • the piece of wood may be curved or bent, because it does not break when compressed in a heated state.
  • the compressible piece of wood is moist or probably saturated with liquid.
  • the wood may then come from a nearly freshly cut tree, which has not had time to dry yet and is thus saturated with its growing liquids.
  • the piece of wood can also be saturated with water afterwards, whereby a saturation preferably occurs by positioning the pieces of wood to stand in a water basin so that one end of the piece of wood is on the water level or above it. The saturation then takes place rapidly and securely under the influence of capillary effect.
  • the piece of wood is compressed slowly in the direction transverse to the fibres into a desired shape, whereby it straightens, or it can also be made curved or perhaps even bent in a desired manner.
  • a desired cross-section may be provided at the same time by selecting the shape of compressing jaws, whereby it is, for instance, possible to compress from a round piece of wood a reactangular piece of wood or a piece of wood provided with recesses, such as a door frame or another corresponding piece of wood having a multiformed cross-section.
  • the surface of the piece of wood is densified and becomes dense and hard. If the compression ratio remains suitable, the heart portion of the wood remains softer than the surface.
  • the insulating capacity of the wood is then partly maintained, while the surface portion can be made in a desired manner durable and dense for fastening of fittings and, on the other hand, weather resistant because of its density.
  • the compression ratio can be kept greater, if desired, due to which are obtained throughout dense and hard pieces of desired shape, which can be used as such for various purposes.
  • the compression is followed by a heating 16, a controlled temperature drop 17 and a cooling 18.
  • Figure 6 shows schematically a side view of another compressing equipment suitable for implementing the method of the invention.
  • a compressing unit 19 is formed by compressing jaws 6 and 7 and a compression cylinder 5 pressing the compressing jaw 7.
  • a piece of wood 11 is positioned between the compressing jaws 6 and 7, where a separate form part 6a, for instance, may also be positioned to provide a shoulder at the compressed piece 11a. While the piece of wood 11 is between the compressing jaws 6 and 7, the jaw 7 is pressed by means of the cylinder 15 in the figure downwards, due to which the heated piece of wood 11 is formed to a compressed piece of wood 11a according to the space defined by the jaws.
  • separate compressing jaws 6 and 7 can be used, which are coupled to each other after the compression in such a way that the piece of wood 11a remains between them and the final measures may be performed by displacing the coupled compressing jaws 6 and 7 to the following step, while new separate compressing jaws are positioned in the compressing equipment for next compressible piece of wood.
  • Another alternative is to perform the heating and the controlled temperature drop as well as the cooling in the compressing equipment by using fixed stationary compressing jaws 6 and 7, which is, however, a relatively slow procedure in view of bigger volumes of production and requires a plurality of separate compressing devices for providing a sufficient capacity.
  • Figure 7 shows schematically a heating device, by which a compressible piece of wood 11 can be preheated before compression and which device may be used for heating the compressed piece of wood 11a after the compression, respectively.
  • the piece of wood is positioned between two electrodes 20 and 21 in such a way that, when heated, the electrodes are placed against the faces of the piece of wood 11.
  • the electrodes 20 and 21 are connected by means of conductors 22 and 23 to a current source 24, which generates a voltage between the electrodes 20 and 21 so that a current flows between them through the piece of wood 11.
  • the current source may feed either direct or alternating voltage, if only a suitable current is generated through the piece of wood 11 so that the entire piece of wood 11 is heated equally.
  • the compressing equipment may have quite varying structures and the structure and operation of its jaws may be implemented rather freely.
  • the essential thing is that a compressible piece of wood will be subjected to a similar compression along its whole length.
  • the compressed piece of wood can be heated either, as described above, by conducting electric current through it in its longitudinal or even transverse direction or by heating the compressing jaws by electromagnetic radiation or in some other practicable manner.
  • the piece of wood can be cooled after the heating either by letting it cool by itself after the termination of the heating or, for instance, by cooling the compressing jaws in a controlled manner either with steam or water or in another suitable way.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
  • Debarking, Splitting, And Disintegration Of Timber (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)

Claims (16)

  1. Verfahren zum Herstellen von hartem, gepreßtem Holz, worin
    ein Holzstück zum Erhöhen seiner Dichte und Härte auf ein Volumen kleiner als sein Originalvolumen komprimiert wird,
    das Holzstück auf eine Temperatur über 100°C erwärmt wird, so daß die in dem Holzstück plastifizierenden Materialien unter dem Einfluß der Wärme erweicht und zu einem Anhaften an das verbleibende Holzmaterial gebracht werden können, und
    die Temperatur des komprimierten und erwärmten Holzstücks erniedrigt wird, um die weichen Materialien fest werden zu lassen und das Holzstück in seiner komprimierten Form permanent zu fixieren,
    dadurch gekennzeichnet, daß
    das Erwärmen des Holzstücks durch Hindurchleiten eines elektrischen Stroms durch das Holzstück erfolgt, so daß in dem Holz enthaltene Flüssigkeit, und somit durch die Flüssigkeit das gesamte Holzmaterial, erwärmt wird.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß das Erwärmen des Holzstücks vor dem Komprimieren des Holzstücks erfolgt.
  3. Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß nach dem Komprimieren des Holzstücks ein zusätzliches Erwärmen des Holzstücks erfolgt.
  4. Verfahren nach Anspruch 3, dadurch gekennzeichnet, daß das zusätzliche Erwärmen des Holzstücks durch Hindurchleiten eines elektrischen Stroms durch das Holzstück erfolgt.
  5. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß das Erwärmen des Holzstücks nach oder während der Kompression des Holzstücks stattfindet.
  6. Verfahren nach Anspruch 5, dadurch gekennzeichnet, daß vor dem Komprimieren des Holzstücks ein Vorwärmen des Holzstücks erfolgt.
  7. Verfahren nach Anspruch 6, dadurch gekennzeichnet, daß das Vorwärmen des Holzstücks durch Hindurchleiten eines elektrischen Stroms durch das Holzstück erfolgt.
  8. Verfahren nach Anspruch 5, dadurch gekennzeichnet, daß das Holzstück im wesentlichen bei Raumtemperatur komprimiert wird.
  9. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß der elektrische Strom in Richtung der Holzfasern durch das Holzstück geleitet wird.
  10. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß das Holzstück in einer Richtung quer zu seinen Holzfasern und gleichmäßig entlang seines gesamten Querschnitts komprimiert wird.
  11. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß das Holzstück auf eine vorbestimmte Querschnittsform komprimiert wird, und daß das Holzstück in seiner komprimierten Form auf eine Temperatur abgekühlt wird, bei der die während des Erwärmens plastifizierenden Materialien fest werden und das komprimierte Holzstück in seiner komprimierten Form permanent fixieren.
  12. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Temperatur des Holzstücks auf etwa 100°C gesenkt und das Holzstück danach rasch abgekühlt wird.
  13. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß das Holzstück nach dem Komprimieren auf eine Temperatur von über 500°C erwärmt wird.
  14. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß das Holzstück komprimiert wird, wenn sein Feuchtigkeitsgehalt mindestens 12 % beträgt.
  15. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß das Holzstück komprimiert wird, wenn es im wesentlichen mit Wasser gesättigt ist.
  16. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß das Holzstück komprimiert wird, wenn es im wesentlichen mit seinen eigenen Wachstumsflüssigkeiten, ohne extra Wasser, gesättigt ist.
EP94909137A 1993-03-10 1994-03-10 Verfahren zur herstellung von hart gepresstem holz Expired - Lifetime EP0688260B1 (de)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
FI931078A FI92920C (fi) 1993-03-10 1993-03-10 Menetelmä kovapintaisen muotopuristetun puun valmistamiseksi
FI931077 1993-03-10
FI931077A FI92919C (fi) 1993-03-10 1993-03-10 Menetelmä kovapuristetun puun valmistamiseksi
FI931078 1993-03-10
PCT/FI1994/000088 WO1994020273A1 (en) 1993-03-10 1994-03-10 Method for making hard-pressed wood

Publications (2)

Publication Number Publication Date
EP0688260A1 EP0688260A1 (de) 1995-12-27
EP0688260B1 true EP0688260B1 (de) 1999-01-27

Family

ID=26159462

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94909137A Expired - Lifetime EP0688260B1 (de) 1993-03-10 1994-03-10 Verfahren zur herstellung von hart gepresstem holz

Country Status (5)

Country Link
EP (1) EP0688260B1 (de)
AT (1) ATE176189T1 (de)
AU (1) AU6209094A (de)
DE (1) DE69416300T2 (de)
WO (1) WO1994020273A1 (de)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100272767B1 (ko) * 1998-03-11 2000-12-01 안선태 통나무의 목질의 경도와 강도를 단단하게 하는 압축 가공방법
KR100272768B1 (ko) * 1998-09-09 2000-12-01 안선태 통나무의 압축가공을 위한 성형틀의 구조
FI110241B (fi) * 1999-06-29 2002-12-31 Valtion Teknillinen Menetelmä puristettujen puukappaleiden valmistamiseksi
FI117520B (fi) * 2001-02-09 2006-11-15 Arboreo Technologies Ltd Oy Menetelmä puun käsittelemiseksi ja kuivaamiseksi
US6553688B1 (en) * 2002-01-11 2003-04-29 Shen-Ba Lee Method for producing a piece of timber including heartwood
FI114785B (fi) 2002-06-12 2004-12-31 Jaakko Kause Menetelmä lahon- ja säänkestävän sekä ominaisuuksiltaan jalopuunkaltaisen puutuotteen aikaansaamiseksi
NL1023267C2 (nl) * 2003-04-25 2004-10-27 Shen-Ba Lee Werkwijze voor het produceren van een stuk constructiehout bevattende kernhout.
FR2854095B1 (fr) * 2003-04-28 2006-07-21 Shen Ba Lee Procede de fabrication d'une piece de bois d'oeuvre comprenant le bois-coeur
ES2221793B1 (es) * 2003-04-28 2006-03-01 Shen-Ba Lee "metodo para producir una pieza de madera de hilo que incluya el duramen".
FI20041278A (fi) * 2003-11-21 2005-05-22 Teknocomp Oy Menetelmä ja laittesto puun tai puutuotteiden käsittelemiseksi
US20080256823A1 (en) * 2004-09-27 2008-10-23 Andrew Karl Knorr Timber Processing
DE102006009161B4 (de) * 2006-02-21 2008-02-21 Technische Universität Dresden Formteil aus Holz und Verfahren zu seiner Herstellung
WO2014090165A1 (zh) * 2012-12-12 2014-06-19 四川柽檀科技有限公司 压缩集成材及其生产方法
CN103612312A (zh) * 2013-12-04 2014-03-05 盛威机械贸易有限公司 木片的压缩工艺
CZ305493B6 (cs) * 2014-03-11 2015-10-29 Mendelova Univerzita V Brně Přípravek pro lisování a fixaci slisovaného dřeva, zejména masivního dřeva přechodně plastifikovaného
DE102015107371A1 (de) 2015-05-11 2016-11-17 Raimund Beck Kg Nagelstreifen aus verholztem Pflanzenmaterial
DE102017100748B4 (de) 2017-01-16 2024-01-18 Raimund Beck Nageltechnik Gmbh Verfahren zum Einschießen eines Nagels in einen Untergrund
DE102017100753B4 (de) 2017-01-16 2021-07-29 Raimund Beck Nageltechnik Gmbh Verfahren zum Befestigen eines zellulosebasierten Bauteils mit einem Bauteil aus einem anderen Material
EP3397869B1 (de) 2017-03-23 2023-08-23 Raimund Beck Nageltechnik GmbH Nagel insbesondere in einem nagelsetzgerät
DE102017106705A1 (de) 2017-03-23 2018-09-27 Raimund Beck Nageltechnik Gmbh Nagel, insbesondere für den Einsatz in einem Nagelsetzgerät
DE102017115893A1 (de) 2017-07-14 2019-01-17 Raimund Beck Nageltechnik Gmbh Verbundbauteil

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK114049B (da) * 1962-03-01 1969-05-19 Savvaerk As Junckers Fremgangsmåde til samtidig stabilisering og tørring af træ.
SE366241B (de) * 1971-10-01 1974-04-22 Inst Khim Drevesiny Akad Nauk

Also Published As

Publication number Publication date
DE69416300D1 (de) 1999-03-11
WO1994020273A1 (en) 1994-09-15
DE69416300T2 (de) 1999-09-02
EP0688260A1 (de) 1995-12-27
AU6209094A (en) 1994-09-26
ATE176189T1 (de) 1999-02-15

Similar Documents

Publication Publication Date Title
EP0688260B1 (de) Verfahren zur herstellung von hart gepresstem holz
AT390396B (de) Verfahren zum herstellen eines gegebenenfalls plattenfoermigen kunstharz-hochdruckformkoerpers sowie vorprodukt zum einsatz bei einem solchen verfahren
DE69925737T2 (de) Verfahren zur herstellung von formgepressten türverkleidungen aus flächigem holzverbundwerkstoff, sowie die so erhaltene türverkleidung und tür
EP1113911B1 (de) Verfahren zum dampfpressen einer platte aus verbundwerkstoff mit mindestens einer bearbeiteten oberfläche
DE3239732C2 (de)
US6868644B2 (en) Method and device for the molding of wood fiber board
DE10084693B4 (de) Verfahren zur Herstellung eines Preßholzproduktes und Vorrichtung zum Durchführen eines solchen Verfahrens
DE3712972C2 (de) Warmformgepreßter Gegenstand und Verfahren zum Warmformpressen
EP0367841B1 (de) Langgestrecktes Verkleidungsprofil, Vorrichtung und Verfahren zu seiner Herstellung
DE19743703A1 (de) Verfahren zum Formen von Holz durch hydrostatisches Pressen
EP0741635B1 (de) Verfahren zum herstellen von lignocelluloseplatten
EP0196301B1 (de) Kontinuierliches oder halbkontinuierliches verfahren zur bildung zusammengestellter holzerzeugnisse
EP0424909A2 (de) Verfahren zum Herstellen von Formteilen
CH346362A (de) Vorrichtung zum Pressen von Hohlkörpern
CA2217588C (en) Method of manufacturing lignocellulosic board
US2136730A (en) Method of treating lumber
DE19728773A1 (de) Verfahren zur Herstellung eines holzfurnierten Teiles, insbesondere eines Innenausbauteils eines Kraftfahrzeuges, und holzfurniertes Teil
EP1512507A2 (de) Formgepresstes Türpanel, und damit hergestellte Tür
EP0809561B1 (de) Verfahren zur herstellung von imprägniertem holz
EP2621694A1 (de) Vorrichtung zur herstellung von makrofasern aus holzstämmen und verfahren zur herstellung eines holzverbundwerkstoffs mittels der makrofasern
EP0177628A1 (de) Verfahren und Vorrichtung zur Herstellung von gepressten Profilkörpern
CN112959447A (zh) 一种密实化竹板材的生产方法
DE3825819A1 (de) Verfahren zum pressen und aushaerten von feuchte enthaltenden pressgutmatten im zuge der herstellung von spanplatten, faserplatten und aehnlichen holzwerkstoffplatten sowie fuer die durchfuehrung des verfahrens eingerichtete presse
DE102004007947A1 (de) Verfahren zur Formung und zum Transport eines zusammengepressten Verbundprodukts
DE656713C (de) Vorrichtung zur Herstellung von Kunstholz aus pflanzlichem Baustoff durch Verpressen des Baustoffes

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19951005

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE DE DK FR GB IT NL SE

17Q First examination report despatched

Effective date: 19960828

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE DE DK FR GB IT NL SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19990127

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 19990127

Ref country code: BE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19990127

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19990127

REF Corresponds to:

Ref document number: 176189

Country of ref document: AT

Date of ref document: 19990215

Kind code of ref document: T

REF Corresponds to:

Ref document number: 69416300

Country of ref document: DE

Date of ref document: 19990311

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19990427

ET Fr: translation filed
NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20011221

Year of fee payment: 8

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20020930

Year of fee payment: 9

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20021001

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20031127

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20040329

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20040401

Year of fee payment: 11

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050310

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050311

EUG Se: european patent has lapsed
GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20050310