DE887261C - Process for the production of high-density wood, synthetic wood or similar fibrous materials with or without binding agents - Google Patents
Process for the production of high-density wood, synthetic wood or similar fibrous materials with or without binding agentsInfo
- Publication number
- DE887261C DE887261C DEH3822D DEH0003822D DE887261C DE 887261 C DE887261 C DE 887261C DE H3822 D DEH3822 D DE H3822D DE H0003822 D DEH0003822 D DE H0003822D DE 887261 C DE887261 C DE 887261C
- Authority
- DE
- Germany
- Prior art keywords
- wood
- production
- density
- fibrous materials
- binding agents
- 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
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mechanical Engineering (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
Description
Verfahren zum Herstellen von hochverdichtetem Holz, Kunstholz oder ähnlichen Faserstoffen mit oder ohne Bindemittel Die Erfindung betrifft das Herstellen von hochverdichtetem Naturholz, Sperrholz, Schichtholz, Kunstholz, Faserstoffen, Faserstofformkörpern mit oder ohne Bindemittel. Es ist bekannt, daß die Festigkeitseigenschaften solcher Körper durch Verdichten unter hohem Druck wesentlich gesteigert werden können. Auf diesem Weg werden z. B. das hochvergütete Buchenschichtholz, die Hartgewebeplatten, die Hartfaserplatten und Kunstholzplatten hergestellt. Bei all diesen Produkten wächst die Festigkeit progressiv zur Änderung des Raumgewichts.Process for the production of high-density wood, synthetic wood or Similar Fibers With Or Without Binder The invention relates to manufacturing of high-density natural wood, plywood, plywood, synthetic wood, fibers, Fibrous moldings with or without a binder. It is known that the strength properties such bodies can be increased significantly by compressing them under high pressure. In this way z. B. the highly tempered beech plywood, the hard fabric panels, the hardboard and synthetic wood panels are made. With all of these products the strength grows progressively with the change in density.
Aus diesem Grunde werden möglichst hohe Verdichtungen angestrebt. Dabei hat sich jedoch gezeigt, daß der aufzuwendende Verdichtungsdruck progressiv mit zunehmender Dichte steigt. Eine obere Grenze der erreichbaren Dichte liegt bei etwa 1,45. Schon bei einer Dichte über 1,07 ist der erforderliche Druck so hoch, daß er in vielen Fällen wirtschaftlich nicht mehr tragbar ist. Die häufigste Art und Weise der Herstellung solcher dichter Körper besteht im Verpressen der Werkstoffe, sei es durch Nachpressen der fertigen Körper, wie z. B. Natur- oder Sperrholz, oder durch Verpressen während des Formvorganges, wie z. B. bei Kunststoffen.For this reason, the highest possible densities are sought. It has been shown, however, that the compression pressure to be applied increases progressively with increasing density. An upper limit of the achievable density is around 1.45. Even at a density above 1.07 , the pressure required is so high that in many cases it is no longer economically viable. The most common way of producing such a tight body consists in pressing the materials, be it by re-pressing the finished body, such as. B. natural or plywood, or by pressing during the molding process, such. B. in plastics.
Die Verformung und Verdichtung kann in trockenem oder nassem Zustand erfolgen. Anstatt durch Pressen kann die Verdichtung auch mit Hilfe von Schleuder- oder Spritzvorrichtungen an sich bekannter Bauart vorgenommen werden. Die Behandlung in nassem Zustand ist vor allem bei Faserstofformkörpern mit oder ohne Bindemittel, wie z. B. Kunstholz, Hartfaserplatten od. dgl., üblich.The deformation and compaction can be in dry or wet condition take place. Instead of compaction can also be done with the help of pressing be made by centrifugal or spray devices of a known type. The treatment in the wet state is mainly in the case of fibrous molded articles with or without binders, such as. B. synthetic wood, hardboard or the like., Common.
Die Erfindung besteht nunmehr in dem Verfahren, hochverdichtete Hölzer oder Faserstoffe dadurch zu erzielen, daß zusätzlich zu den bekannten Verdichtungsvorgängen der vorgenannte Werkstoff evakuiert wird. Es hat sich nämlich gezeigt, daß zu -vierpressendes Holz, Kunstholz od. dgl., immer erhebliche Mengen an Luft durch Oberfiächenadsorbtion und Einschluß enthält, die der Verdichtung Widerstand entgegensetzen, oft auch ein nachträgliches Wiederaufblähen der Körper nach der Pressung verursachen. Durch die Evakuierung wird dieses Luftvolumen beseitigt, die Verdichtung gesteigert, die Festigkeit erhöht, der notwendige Preßdruck vermindert, dadurch die Wirtschaftlichkeit und Formkonstanz gesteigert.The invention now consists in the method, highly compressed wood or to achieve fibrous materials that in addition to the known compression processes the aforementioned material is evacuated. It has been shown that something to be pressed four times Wood, synthetic wood or the like, always considerable amounts of air through surface adsorption and contains inclusions that offer resistance to compression, often also one cause subsequent re-inflation of the body after pressing. Through the Evacuation removes this volume of air, increases compression and strength increased, the necessary pressure reduced, thereby the economy and Constancy of form increased.
Beim Verpressen eines lockeren Fasergutes in geschlossenen Formen, `wie z. B. Faserschnitzeln od. d-1., kann zweckmäßig die ganze Preßform mit dem eingefüllten Preßgut evakuiert werden. Bei dem Herstellen von Preßholz, Schichtholz, hochverdichtetem Kunstholz, bei dem üblicherweise ohne geschlossene Preßformen gearbeitet wird, können entweder die ganzen Pressen unter Vakuum gesetzt werden, oder die Etagen der Pressen werden geschlossen und evakuiert. Mit der bekannten Absaugung von Dämpfen aus Heizpressen hat diese Evakuierung nichts zu tun, da sie der Entfernung der eingeschlossenen Luft dient und 'höheren Unterdruck erfordert als die Absaugung der an sich schon unter Überdruck stehenden Wasser- oder Lösungsmitteldämpfe.When compressing loose fiber material in closed molds, `such as B. fiber chips od. D-1., Can expediently the whole mold with the filled pressing material are evacuated. When producing compressed wood, plywood, high-density synthetic wood, which is usually worked without closed molds the whole press can be put under vacuum, or the floors the presses are closed and evacuated. With the well-known extraction of vapors This evacuation has nothing to do with the removal of the trapped from hot presses Air is used and 'requires higher negative pressure than the suction of the itself pressurized water or solvent vapors.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEH3822D DE887261C (en) | 1941-09-10 | 1941-09-10 | Process for the production of high-density wood, synthetic wood or similar fibrous materials with or without binding agents |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEH3822D DE887261C (en) | 1941-09-10 | 1941-09-10 | Process for the production of high-density wood, synthetic wood or similar fibrous materials with or without binding agents |
Publications (1)
Publication Number | Publication Date |
---|---|
DE887261C true DE887261C (en) | 1953-08-20 |
Family
ID=7143753
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEH3822D Expired DE887261C (en) | 1941-09-10 | 1941-09-10 | Process for the production of high-density wood, synthetic wood or similar fibrous materials with or without binding agents |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE887261C (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1224916B (en) * | 1959-03-04 | 1966-09-15 | Max Himmelheber Dipl Ing | Process for the production of chipboard |
DE1279316B (en) * | 1960-05-06 | 1968-10-03 | Fmc Corp | Use of mechanically comminuted cellulose crystallite aggregates for the production of shock and heat-resistant molded bodies |
EP0085986A1 (en) * | 1982-02-09 | 1983-08-17 | J. Rettenmaier & Söhne GmbH + Co. | Method of reducing the absorption capacity of wood |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE605605C (en) * | 1934-11-14 | Becker & Van Huellen | Press for pressed pieces from wood waste |
-
1941
- 1941-09-10 DE DEH3822D patent/DE887261C/en not_active Expired
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE605605C (en) * | 1934-11-14 | Becker & Van Huellen | Press for pressed pieces from wood waste |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1224916B (en) * | 1959-03-04 | 1966-09-15 | Max Himmelheber Dipl Ing | Process for the production of chipboard |
DE1279316B (en) * | 1960-05-06 | 1968-10-03 | Fmc Corp | Use of mechanically comminuted cellulose crystallite aggregates for the production of shock and heat-resistant molded bodies |
DE1279316C2 (en) * | 1960-05-06 | 1969-05-29 | Fmc Corp | Use of mechanically comminuted cellulose crystallite aggregates for the production of shock and heat-resistant molded bodies |
EP0085986A1 (en) * | 1982-02-09 | 1983-08-17 | J. Rettenmaier & Söhne GmbH + Co. | Method of reducing the absorption capacity of wood |
WO1983002745A1 (en) * | 1982-02-09 | 1983-08-18 | Rettenmaier, Josef | Method for reducing the capillarity of wood |
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