DE735234C - Process for finishing fresh wood veneers - Google Patents
Process for finishing fresh wood veneersInfo
- Publication number
- DE735234C DE735234C DEJ68391D DEJ0068391D DE735234C DE 735234 C DE735234 C DE 735234C DE J68391 D DEJ68391 D DE J68391D DE J0068391 D DEJ0068391 D DE J0068391D DE 735234 C DE735234 C DE 735234C
- Authority
- DE
- Germany
- Prior art keywords
- veneers
- wood veneers
- fresh wood
- finishing
- wood
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27D—WORKING VENEER OR PLYWOOD
- B27D1/00—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27H—BENDING WOOD OR SIMILAR MATERIAL; COOPERAGE; MAKING WHEELS FROM WOOD OR SIMILAR MATERIAL
- B27H1/00—Bending wood stock, e.g. boards
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
- Veneer Processing And Manufacture Of Plywood (AREA)
Description
Verfahren zur Veredelung frischer Holzfurniere Durch das Patent 724 228 ist es bekanntgeworden, feuchte Furniere kalt nachzuwalzen, um das beschädigte Holzgefüge wieder in Ordnung zu bringen. Dabei lassen sich die Poren des Holzes nicht oder nur insoweit zusammenpressen, als sie nicht mit Wasser gefüllt sind. Die so vorbehandelten frischen Furniere müssen daher, um die Veredelung zu vollenden, in halbtrocken-- und trockenem Zustand wiederholt nachgewalzt werden, um den für das trockene Furnier gewünschten Grad von Dichtigkeit, Elastizität und Haltbarkeit zu erreichen.Process for the finishing of fresh wood veneers Through the patent 724 228 it has become known to re-roll damp veneers cold to remove the damaged Bringing the wood structure back in order. In doing so, the pores of the wood do not compress or only to the extent that they are not filled with water. The fresh veneers pretreated in this way must therefore, in order to complete the finishing, be re-rolled repeatedly in a semi-dry and dry state in order to achieve the the dry veneer desired degree of tightness, elasticity and durability to reach.
Da es nun einerseits bei frischen Furnieren wegen des Wassergehalts unmöglich ist, sie in gleicher Weise zu veredeln wie die trockenen Furniere, andererseits aber auch die lufttrockenen Furniere oft noch einen zu hohen Grad von Feuchtigkeit besitzen, so kann es vorkommen, daß sich auch bei letzteren erst nach dem Walzen herausstellt, daß infolge noch zu hohen Wassergehalts des Furniers ein voll zufriedenstellendes Ergebnis nicht erreicht werden konnte, das Furnier vielmehr durch weitere Abgabe von Feuchtigkeit an der Luft sich noch mehr oder weniger wirft oder verzieht.Since it is now on the one hand with fresh veneers because of the water content it is impossible to refine them in the same way as the dry veneers, on the other hand but also the air-dry veneers often still have too high a degree of moisture own, it can happen that even with the latter only after rolling it turns out that, as the water content of the veneer is still too high, a completely satisfactory one Result could not be achieved, the veneer rather through further delivery moisture in the air is more or less thrown or warped.
Um nun sicher züx sein, daß die den Walzprozeß durchmachenden Furniere auch einen genügenden und richtigen Trockengrad erhalten, ohne daß eine Nachprüfung im einzelnen notwendig wäre, kann man diesem Übelstand dadurch abhelfen, daß mindestens eine der beiden Walzen, zwischen welchen das feuchte Furnier hindurchgeführt wird, so stark erhitzt wird, daß die im -Holz noch enthaltene überschüssige Feuchtigkeitsmenge durch Verdampfen entfernt wird, wobei aber gleichzeitig durch den ausgeübten Walzendruck das -Holz am Schwinden verhindert und darüber hinaus vielleicht noch etwas mehr gedehnt wird. Dieses Erwärmen bei gleichzeitig ausgeführtem starken Druck hat den Vorteil, daß auch feuchte Furniere, die direkt von der Messer- oder Schälmaschine kommen, gleich fertig veredelt und getrocknet, dabei aber vor dem Schwinden und Welligwerden bewahrt werden können, wenn man sie je nach Holzart und Stärke ein- oder mehrmals oder durch mehrereIiintereinander gelagerte heiße Druckwalzen laufen iäßt.Now to be sure that the veneers going through the rolling process also get a sufficient and correct degree of dryness without a check would be necessary in detail, one can remedy this problem by at least one of the two rollers between which the damp veneer is passed, is heated so much that the excess amount of moisture still contained in the wood is removed by evaporation, but at the same time by the exerted roller pressure the wood prevents it from shrinking and perhaps a little more is stretched. This heating with simultaneous strong pressure has the Advantage that also moist veneers, which are directly from the knife or peeling machine come, finished and dried right away, but before shrinking and Waviness can be preserved if you change them depending on the type of wood and Strength one or more times or through several hot pressure rollers mounted one behind the other runs.
Dabei ist es möglich, noch zu erreichen, daß dem Arbeitsgut dadurch eine besondere Form ,gegeben wird, daß nur eine heiße Walze beim letzten Durchgang Verwendung findet, wodurch das Furnier selbsttätig nach der der heißen Walze zugekehrten Seite etwas hohl wird bzw. nach der kalten Walze zu sich wölbt. Dieser Effekt ist für manche Zwecke, z. B. Schuhbedarf, erwünscht.It is still possible to achieve that the work item thereby a special shape, given that only a hot roller on the last pass Is used, whereby the veneer automatically after facing the hot roller Page becomes a little hollow or bulges after the cold roller. This effect is for some purposes, e.g. B. Shoe supplies, desired.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEJ68391D DE735234C (en) | 1940-12-06 | 1940-12-06 | Process for finishing fresh wood veneers |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEJ68391D DE735234C (en) | 1940-12-06 | 1940-12-06 | Process for finishing fresh wood veneers |
Publications (1)
Publication Number | Publication Date |
---|---|
DE735234C true DE735234C (en) | 1943-08-10 |
Family
ID=7208071
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEJ68391D Expired DE735234C (en) | 1940-12-06 | 1940-12-06 | Process for finishing fresh wood veneers |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE735234C (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3031217A1 (en) * | 1979-08-20 | 1981-03-26 | Meinan Machinery Works, Inc., Ohbushi, Aichi | METHOD AND DEVICE FOR DRYING A VENEER LEAF |
EP0827452A1 (en) * | 1994-11-03 | 1998-03-11 | Atlantic Automotive Components | Fabrication of plastic and wood veneer composite |
-
1940
- 1940-12-06 DE DEJ68391D patent/DE735234C/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3031217A1 (en) * | 1979-08-20 | 1981-03-26 | Meinan Machinery Works, Inc., Ohbushi, Aichi | METHOD AND DEVICE FOR DRYING A VENEER LEAF |
EP0827452A1 (en) * | 1994-11-03 | 1998-03-11 | Atlantic Automotive Components | Fabrication of plastic and wood veneer composite |
EP0827452A4 (en) * | 1994-11-03 | 1998-07-29 | Atlantic Automotive Components | Fabrication of plastic and wood veneer composite |
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