DE857584C - Method of bending plywood - Google Patents
Method of bending plywoodInfo
- Publication number
- DE857584C DE857584C DEM2547D DEM0002547D DE857584C DE 857584 C DE857584 C DE 857584C DE M2547 D DEM2547 D DE M2547D DE M0002547 D DEM0002547 D DE M0002547D DE 857584 C DE857584 C DE 857584C
- Authority
- DE
- Germany
- Prior art keywords
- plywood
- bending
- panels
- grain
- veneer
- 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
- B27D1/04—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring to produce plywood or articles made therefrom; Plywood sheets
- B27D1/08—Manufacture of shaped articles; Presses specially designed therefor
- B27D1/086—Manufacture of oblong articles, e.g. tubes by spirally winding veneer blanks
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Laminated Bodies (AREA)
Description
Die Erfindung betrifft ein Verfahren zum Biegen von Sperrholz, z. B. Furnierplatten oder Schichtholz, und ist im wesentlichen dadurch gekennzeichnet, daß das Biegen solcher Platten schräg zur Faserrichtung der Furnier- oder Schichtplatten erfolgt. Es wird dazu vorgeschlagen, die zum Biegen verwendeten Sperrholzplatten aus schräg gelegten Furnieren herzustellen. In gewissen Fällen kann allerdings auch die Anordnung getroffen werden, die Faserrichtung der Innenlagen der Sperrholzplatten schräg zur Faserrichtung der Außenlagen verlaufen zu lassen. Die Neigung zur Rißbildung tritt hauptsächlich an den Außenlagen auf.The invention relates to a method for bending plywood, e.g. B. veneer panels or plywood, and is essentially characterized by that the bending of such panels obliquely to the grain direction of the veneer or laminated panels he follows. It is suggested to use the plywood sheets used for bending made from veneers laid at an angle. In certain cases, however, can also the arrangement to be made, the grain direction of the inner layers of the plywood sheets to run obliquely to the grain of the outer layers. The tendency to crack occurs mainly on the outer layers.
Mit der Erfindung wird erreicht, daß die Furniere beim Biegen gleichmäßig beansprucht werden. Würde man z. B. quer, d. h. rechtwinklig zur Faserrichtung einer Furnierplatte, etwa der äußeren, biegen, so würden die Innenlagen in einer grundsätzlich anderen Richtung, nämlich längs zur Faser, gebogen.With the invention it is achieved that the veneers are evenly bent when they are bent are claimed. Would you z. B. across, d. H. perpendicular to the grain of a If you bend the veneer board, for example the outer one, then the inner layers would basically be in one in the other direction, namely along the grain, bent.
,Man hat die Erfahrung gemacht, daß diejenigen Furnierplatten zur Rißbildung neigen, die im rechten Winkel zur Faserrichtung gebogen werden., Experience has shown that veneer panels are used for Tend to form cracks that are bent at right angles to the grain.
Bei Anwendung des erfindungsgemäßen Verfahrens kommen derartige Rißbildungen nicht in Betracht,weil dieFurnierplatten niemals im rechten Winkel zurFaserrichtung gebogen und beansprucht werden.When the method according to the invention is used, such crack formations occur out of consideration because the veneer panels are never at right angles to the grain be bent and stressed.
Das Verfahren gemäß der Erfindung kann für die Herstellung jeglicher Art gebogener Gegenstände aus Sperrholz angewendet werden. Insbesondere hat es sich hervorragend für die Herstellung von Hohlkörpern, z. B. Rohren, geeignet.The method according to the invention can be used for the production of any Kind of bent plywood objects can be applied. In particular, it has excellent for the production of hollow bodies, e.g. B. pipes, suitable.
In der Zeichnung ist in Abb. i der Teilausschnitt eines Rohres veranschaulicht. A66. 2 zeigt die Abwicklung.In the drawing, the partial section of a pipe is illustrated in Fig. I. A66. 2 shows the development.
Wie aus Abb. i ersichtlich, verlaufen die Furnierplatten spiralförmig, weil das Biegen oben schräg zur Faserrichtung erfolgt ist. Die Abwicklung des Rohrmantels gemäß Abb.2 zeigt deutlich eine Sperrholzplatte, bei der die Furniere schräg liegend zusammengestellt sind.As can be seen from Fig. I, the veneer panels run in a spiral, because the bending is done at an angle to the grain. The development of the pipe jacket according to Fig. 2 clearly shows a plywood panel with the veneers lying at an angle are put together.
Allerdings kann, wie bereits erwähnt, die Anordnung so getroffen sein, daß die Faserrichtung der Innenlagen der Sperrholzplatten schräg zur Faserrichtung der Außenlagen verläuft. Die Faserrichtung für derartige Innenlagen ist in Abb. 2 in strichpunktierten Linien dargestellt.However, as already mentioned, the arrangement can be made that the grain direction of the inner layers of the plywood panels is oblique to the grain direction of the outer layers. The grain direction for such inner layers is shown in Fig. 2 shown in dash-dotted lines.
Claims (3)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEM2547D DE857584C (en) | 1942-11-02 | 1942-11-03 | Method of bending plywood |
BE452757D BE452757A (en) | 1942-11-02 | 1943-10-16 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE899065X | 1942-11-02 | ||
DEM2547D DE857584C (en) | 1942-11-02 | 1942-11-03 | Method of bending plywood |
Publications (1)
Publication Number | Publication Date |
---|---|
DE857584C true DE857584C (en) | 1952-12-01 |
Family
ID=25956004
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEM2547D Expired DE857584C (en) | 1942-11-02 | 1942-11-03 | Method of bending plywood |
Country Status (2)
Country | Link |
---|---|
BE (1) | BE452757A (en) |
DE (1) | DE857584C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2563809A1 (en) * | 1984-05-03 | 1985-11-08 | Cessac Jean Marie | Timber tubular packaging and its method of manufacture |
-
1942
- 1942-11-03 DE DEM2547D patent/DE857584C/en not_active Expired
-
1943
- 1943-10-16 BE BE452757D patent/BE452757A/xx unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2563809A1 (en) * | 1984-05-03 | 1985-11-08 | Cessac Jean Marie | Timber tubular packaging and its method of manufacture |
Also Published As
Publication number | Publication date |
---|---|
BE452757A (en) | 1943-11-30 |
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