CH634503A5 - Method for preparing wood for the purpose of impregnating it with protective agents - Google Patents
Method for preparing wood for the purpose of impregnating it with protective agents Download PDFInfo
- Publication number
- CH634503A5 CH634503A5 CH98080A CH98080A CH634503A5 CH 634503 A5 CH634503 A5 CH 634503A5 CH 98080 A CH98080 A CH 98080A CH 98080 A CH98080 A CH 98080A CH 634503 A5 CH634503 A5 CH 634503A5
- Authority
- CH
- Switzerland
- Prior art keywords
- wood
- perforations
- piece
- parallel
- fibers
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/02—Processes; Apparatus
- B27K3/0278—Processes; Apparatus involving an additional treatment during or after impregnation
- B27K3/0292—Processes; Apparatus involving an additional treatment during or after impregnation for improving fixation
-
- 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
- B27M1/003—Mechanical surface treatment
- B27M1/006—Mechanical surface treatment for preparation of impregnation by deep incising
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/30—Organic material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/30—Organic material
- B23K2103/36—Wood or similar materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/50—Inorganic material, e.g. metals, not provided for in B23K2103/02 – B23K2103/26
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/02—Processes; Apparatus
- B27K3/0278—Processes; Apparatus involving an additional treatment during or after impregnation
- B27K3/0285—Processes; Apparatus involving an additional treatment during or after impregnation for improving the penetration of the impregnating fluid
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Mechanical Engineering (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
Description
La présente invention a pour objet un procédé de préparation du bois en vue de son imprégnation par des agents protecteurs. The present invention relates to a process for the preparation of wood for its impregnation with protective agents.
Il est connu d'imprégner le bois, en particulier le bois de construction, par des agents protecteurs tels que des agents cryptogamiques, des agents prévenant la putréfaction, des agents insecticides ou autres, voire ignifuges, constitués le plus souvent par des sels appliqués à l'état liquide. It is known to impregnate wood, in particular construction wood, with protective agents such as cryptogamic agents, agents preventing putrefaction, insecticidal or other agents, even flame retardants, most often consisting of salts applied to liquid state.
Une telle imprégnation peut s'effectuer soit par simple immersion, soit sous vide ou sous pression. Such impregnation can be carried out either by simple immersion, or under vacuum or under pressure.
Si l'imprégnation des bois ronds de résineux ne pose pas trop de problèmes lorsqu'elle est appliquée à des bois à l'état frais, il en va tout autrement lorsque les bois sont sciés et équarris. En effet, Féquarrissage élimine la quasi-totalité de l'aubier du bois, de sorte qu'il n'en reste plus que le cœur, lequel est formé de bois mort ne jouant aucun rôle dans la transmission de la sève lorsque l'arbre est encore vivant, et qui, de ce fait, est totalement réfractaire à la conduction du produit d'imprégnation. If the impregnation of round softwoods does not pose too many problems when applied to fresh woods, it is quite different when the woods are sawn and squared. Indeed, squaring eliminates almost all of the sapwood from the wood, so that only the heart remains, which is formed of dead wood playing no role in the transmission of the sap when the tree is still alive, and which, therefore, is completely refractory to the conduction of the impregnation product.
C'est la raison pour laquelle il s'est révélé nécessaire de préparer le bois, en particulier le bois de construction, en vue de son imprégnation. This is the reason why it has proved necessary to prepare the wood, in particular the timber, for its impregnation.
Une telle préparation du bois s'effectue en y ménageant des perforations qui sont, selon les techniques connues, réalisées mécaniquement. Such a preparation of the wood is carried out by providing perforations there which are, according to known techniques, made mechanically.
On peut utiliser à cette fin des aiguilles, fixes ou rotatives, dont on fait travailler simultanément le plus grand nombre possible de façon Needles can be used for this purpose, fixed or rotary, which work as many as possible simultaneously
à réaliser d'un seul coup le nombre le plus élevé possible de perforations. Le risque est grand, cependant, que ces aiguilles se cassent, ce qui est d'autant plus regrettable que l'opérateur ne s'en rend pas obligatoirement compte et qu'il peut, dès lors, continuer à travailler avec un outillage défectueux ne réalisant pas la totalité des perforations désirées. to carry out at the same time the highest possible number of perforations. The risk is great, however, that these needles break, which is all the more regrettable that the operator does not necessarily realize it and that he can, therefore, continue to work with defective tools. not achieving all of the desired perforations.
On a également utilisé, pour la réalisation de perforations dans le bois, des cylindres munis de pointes ou de couteaux, entre lesquels les pièces de bois à traiter sont laminées. Un tel traitement, cependant, détériore fortement le bois et, partant, en diminue la résistance mécanique. Cylinders provided with points or knives have also been used for the perforations in the wood, between which the pieces of wood to be treated are laminated. Such treatment, however, greatly deteriorates the wood and therefore decreases its mechanical strength.
Le but de la présente invention est de remédier à ces inconvénients. The object of the present invention is to remedy these drawbacks.
Ce but est atteint grâce au fait que les perforations de préparation du bois en vue de son imprégnation, augmentant sa réceptivité à celle-ci, sont réalisées par application d'un rayon laser. This object is achieved thanks to the fact that the perforations for preparing the wood for its impregnation, increasing its receptivity thereto, are produced by applying a laser beam.
Les travaux effectués en collaboration avec la chaire de construction en bois de l'Ecole polytechnique fédérale de Lausanne, ont amené à constater que l'application du rayon laser pour la réalisation de perforations dans le bois, en vue de sa préparation à une opération subséquente d'imprégnation, présente de grands avantages et offre de larges perspectives. The work carried out in collaboration with the wooden construction chair of the Federal Polytechnic School of Lausanne, led to note that the application of the laser beam for the perforation in wood, with a view to its preparation for a subsequent operation impregnation, has great advantages and offers broad perspectives.
Dans la pratique, on utilise un générateur de rayons lasers que l'on place en regard de la pièce de bois à travailler, celle-ci étant elle-même disposée sur une table mobile qui se déplace en continu dans une direction telle que la pièce en travail défile en regard du générateur laser parallèlement à la direction des fibres de son bois. On tire alors des salves au moyen du générateur laser sans interruption du mouvement de la pièce en travail. La table est agencée de façon que, après la réalisation de chaque ligne de perforations parallèle à la direction des fibres du bois, elle puisse être déplacée transversalement, par exemple manuellement, de façon qu'une nouvelle ligne de perforations puisse être réalisée, parallèlement à la première. La machine permet également d'imprimer à la table, entre la réalisation de chaque ligne de perforations, un court déplacement longitudinal, c'est-à-dire dans le sens des fibres du bois, de façon que les perforations de chaque ligne soient légèrement décalées longitudinalement par rapport aux perforations des lignes adjacentes. In practice, a laser beam generator is used which is placed opposite the piece of wood to be worked, the latter being itself arranged on a movable table which continuously moves in a direction such as the piece. in work scrolls opposite the laser generator parallel to the direction of the fibers of its wood. Bursts are then fired by means of the laser generator without interrupting the movement of the workpiece. The table is arranged so that, after the completion of each line of perforations parallel to the direction of the wood fibers, it can be moved transversely, for example manually, so that a new line of perforations can be made, parallel to the first one. The machine also makes it possible to print at the table, between the production of each line of perforations, a short longitudinal displacement, that is to say in the direction of the wood fibers, so that the perforations of each line are slightly longitudinally offset from the perforations of the adjacent lines.
Ainsi, les perforations sont disposées matriciellement, suivant des lignes parallèles à la direction des fibres du bois, d'une part, et suivant des lignes inclinées par rapport à cette direction, d'autre part. Thus, the perforations are arranged in a matrix, along lines parallel to the direction of the wood fibers, on the one hand, and along lines inclined relative to this direction, on the other hand.
Les perforations pourront être de profondeurs différentes, selon les nécessités de l'imprégnation, par exemple 20 mm, comme elles pourront aussi traverser de part en part la pièce en travail. Elles pourront être réalisées sous la forme d'un réseau serré, dont la densité variera avec la cadence du tir et la vitesse linéaire de déplacement de la table. Si, par exemple, la fréquence du tir laser est de 100 coups/s et si la pièce de bois avance à une vitesse de 4 m/s, on aura 100 coups tous les 4 m, soit un coup tous les 40 mm. Si, en outre, la pièce de bois est déplacée latéralement de 3 mm après la réalisation de chaque ligne de perforations, le nombre total des perforations s'élèvera alors à plus de 8000/m2. The perforations can be of different depths, depending on the requirements of the impregnation, for example 20 mm, as they can also pass right through the work piece. They may be produced in the form of a tight network, the density of which will vary with the rate of fire and the linear speed of movement of the table. If, for example, the frequency of the laser shot is 100 shots / s and if the piece of wood advances at a speed of 4 m / s, we will have 100 shots every 4 m, or one shot every 40 mm. If, in addition, the piece of wood is moved laterally by 3 mm after the completion of each line of perforations, the total number of perforations will then amount to more than 8000 / m2.
Les perforations pourront se présenter sous la forme de trous d'un diamètre de 1/10 à 10/10 mm, par exemple, ou encore de fentes allongées. Suivant la vitesse d'avance de la pièce en travail, de telles fentes pourront présenter une ouverture, à la surface de la pièce, relativement longue, cette longueur allant en diminuant avec la profondeur de la fente. Une telle forme des fentes facilitera, en particulier, l'imprégnation sous pression. The perforations may be in the form of holes with a diameter of 1/10 to 10/10 mm, for example, or even elongated slots. Depending on the speed of advance of the workpiece, such slots may have an opening on the surface of the workpiece, relatively long, this length decreasing with the depth of the slot. Such a shape of the slots will facilitate, in particular, the impregnation under pressure.
Bien entendu, la dimension des perforations devra augmenter si l'imprégnation doit se faire par simple immersion, sans application de pression. Of course, the size of the perforations will have to increase if the impregnation is to be done by simple immersion, without application of pressure.
L'application de laser présente de multiples avantages: tout d'abord et principalement, il n'y a pas de risque de bris des outils de perforation, comme c'est le cas avec les aiguilles, rotatives ou non, comme mentionné précédemment. The laser application has multiple advantages: first and foremost, there is no risk of breakage of the perforation tools, as is the case with needles, rotary or not, as mentioned previously.
De plus, la perforation s'effectue sans produire de copeaux ou de In addition, the perforation is carried out without producing chips or
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sciure, de sorte qu'elles ne sont pas obstruées et que leur diamètre peut être plus petit, ce qui compromet moins la solidité du bois. sawdust, so that they are not obstructed and their diameter can be smaller, which less compromises the solidity of the wood.
L'énergie mise en œuvre est également plus faible avec le laser qui n'a pas à vaincre les frottements du perçage mécanique et qui ne provoque pas les déplacements de la masse d'un outillage de perçage. 5 The energy used is also lower with the laser which does not have to overcome the friction of the mechanical drilling and which does not cause the displacements of the mass of a drilling tool. 5
Il est à remarquer que, au lieu d'utiliser un laser immobile et de déplacer la pièce de bois en travail, on pourra laisser celle-ci immobile et la balayer au moyen d'un faisceau laser mobile. On pourra également combiner les deux dispositions et déplacer la pièce de bois dans une direction et le laser dans l'autre. It should be noted that, instead of using a stationary laser and moving the piece of wood in work, it can be left stationary and swept by means of a mobile laser beam. We can also combine the two arrangements and move the piece of wood in one direction and the laser in the other.
Claims (10)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH98080A CH634503A5 (en) | 1980-02-07 | 1980-02-07 | Method for preparing wood for the purpose of impregnating it with protective agents |
DE19803023245 DE3023245A1 (en) | 1980-02-07 | 1980-06-21 | METHOD FOR TREATING WOOD TO IMPROVE IT WITH PROTECTIVE AGENTS |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH98080A CH634503A5 (en) | 1980-02-07 | 1980-02-07 | Method for preparing wood for the purpose of impregnating it with protective agents |
Publications (1)
Publication Number | Publication Date |
---|---|
CH634503A5 true CH634503A5 (en) | 1983-02-15 |
Family
ID=4199669
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH98080A CH634503A5 (en) | 1980-02-07 | 1980-02-07 | Method for preparing wood for the purpose of impregnating it with protective agents |
Country Status (2)
Country | Link |
---|---|
CH (1) | CH634503A5 (en) |
DE (1) | DE3023245A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0191276A1 (en) * | 1985-02-06 | 1986-08-20 | Hamon-Sobelco S.A. | Method for preparing wood to impregnate it |
DE4002039A1 (en) * | 1990-01-24 | 1991-07-25 | Pelz Ernst Erpe Vertrieb | Cutting holes in wooden panel by variable laser beam - applying beam at points along pattern and fitting coloured stoppers or other decorative markers into holes |
CN108340078A (en) * | 2018-02-23 | 2018-07-31 | 广东省林业科学研究院 | It is a kind of hardly possible penetrated wood scoring methods and its application |
RU2755641C1 (en) * | 2020-10-07 | 2021-09-17 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Сибирский государственный университет науки и технологий имени академика М.Ф. Решетнева" (СибГУ им. М.Ф. Решетнева) | Method for preparing wood for impregnation |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1642164C3 (en) * | 1966-12-09 | 1975-07-17 | Benker Geb. Reiser, Barbara, 8051 Hoergertshausen | Process for impregnating logs |
DE2506321A1 (en) * | 1975-02-14 | 1976-08-26 | Weserhuette Ag Eisenwerk | METHOD OF GROOVING HOLES AND SLOTS IN LUMBER |
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1980
- 1980-02-07 CH CH98080A patent/CH634503A5/en not_active IP Right Cessation
- 1980-06-21 DE DE19803023245 patent/DE3023245A1/en not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
DE3023245A1 (en) | 1981-08-13 |
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Legal Events
Date | Code | Title | Description |
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PL | Patent ceased |