CH315961A - Process for the production of wood mass impregnated with binding agents and for the molding of objects from this wood mass - Google Patents

Description

       

  Process for the production of wood mass impregnated with binding sticks and for the shaping of objects from this wood mass. It is known to increase the absorption capacity of wood panels and veneers for impregnating agents by making the wood fibers, for example by perforations, incisions or kinks,

      be interrupted many times at short intervals.



  In contrast, the invention aims to achieve a uniform distribution of the binders through the entire wood fiber mass without applying the aforementioned procedures, which reduce the longitudinal strength in the fiber direction and also make the manufacture considerably more expensive.



       The method of the invention is. characterized in that wood is first subjected to mechanical processing under pressure, in which the cross-connection of the longitudinal fibers is loosened by forced mutual displacement of the wood fibers parallel to one another, whereupon the wood mass is introduced into a liquid containing the binding agent and after thorough impregnation is deformed.



  Peeled wood or sawn timber can be used as the starting material. will. The processing before the impregnation can be carried out in various ways, for example by strong beating or pressing between rollers to loosen the band of wood fibers sufficiently. In addition to mechanical processing, chemical aids can also be used.

   According to one embodiment of the invention, the wood in the moist condition is passed through at least once between pairs of corrugated rollers with corrugations running in the direction of the surface lines, the longitudinal fibers of the wood running approximately parallel to the corrugations of the rollers.



  If necessary, the wood can alternately pass corrugated roller pairs and smooth-walled roller pairs.



  The mutual transverse displacement of the longitudinal fibers of the wood, which is forced between the fluted rollers or on other suitably profiled rollers, loosens and destroys the cross connection between the fibers. A subsequent pass through smooth rollers causes the fiber to be further loosened by shifting the fiber back on new attack surfaces.

   The result is a wood mass of small volume and loose fiber bundling. If this' mass is introduced into a liquid which contains binding agents or other impregnating agents and possibly also fillers, it absorbs them eagerly and can increase its volume almost to the original.

   Because the mechanically pre-processed wood mass, which has been compacted with extensive loosening of its fiber structure, is passed into the impregnating liquid immediately after leaving the last pair of rollers, the vacuum created by the rising of the mechanically processed wood mass inside can be used to suck in the liquid will. The mechanically pre-processed wood mass has a liquid absorption capacity of 300/9 and more.

   Depending on the strength of the binding agent content of the impregnating liquid, any desired percentage of binding agent content can be achieved through greater or lesser liquid absorption. will. If necessary, lower binder contents can be evenly distributed in the wood.



  A further equalization of the distribution of the binding agent in the wood mass can be achieved by subjecting this mass to a further mechanical action, for example a pressing or a treatment between rollers, after it has been impregnated with binding agents.



  From the wood mass treated in this way, for example, by means of profile rollers or an extrusion press, rod profiles for structural and furniture parts, window profiles and the like or sheets with curved surfaces, for example for blinds, can be formed. Due to the far-reaching structural change, the resistance of the compound is largely reduced during this processing.


    

Claims (1)

PATENT CLAIM A process for the production of wood mass impregnated with binding materials and for the shaping of objects from this wood mass, characterized in that wood is first subjected to mechanical processing under pressure, in which the wood fibers are mutually displaced parallel to one another by ore lengths The cross connection of the longitudinal fibers is loosened, whereupon the wood mass is introduced into a liquid containing the binding agent and is deformed after penetrating impregnation. UNT'ER.ANSPRUC@HE 1. The method according to claim, characterized in that wood in the moist state is at least once paired between rollers with corrugations running in the direction of the surface lines, the longitudinal fibers of the wood being parallel to the corrugations of the rollers run, and then the impregnation and deformation takes place. 2. Method according to patent claim, as marked by the fact that the wood is passed through alternately between corrugated roller pairs and smooth-walled roller pairs before the 'impregnation and further deformation takes place. 3. The method according to patent claim, characterized in that the wood mass is subjected to a further mechanical action for the purpose of further comparing after impregnation with binding agents. 4. The method according to claim and Unteranspraeh 3, characterized in that the shaping of the impregnated wood mass is achieved at the same time by further mechanical treatment. 5. The method according to claim and dependent claim 4, characterized in that the shaping is made by treating the soaked wood mass with profile rollers. 6. The method according to claim and dependent claim 4, characterized in that the shaping is achieved by treating the impregnated wood mass with an extruder. 7. The method according to claim, characterized in that the wood mass, in addition to binders, other substances are added before the deformation.