EP1093896A2 - Starkfurnierkante - Google Patents
Starkfurnierkante Download PDFInfo
- Publication number
- EP1093896A2 EP1093896A2 EP00122317A EP00122317A EP1093896A2 EP 1093896 A2 EP1093896 A2 EP 1093896A2 EP 00122317 A EP00122317 A EP 00122317A EP 00122317 A EP00122317 A EP 00122317A EP 1093896 A2 EP1093896 A2 EP 1093896A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- wood
- veneer
- layers
- layer
- thick
- 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.)
- Withdrawn
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27D—WORKING VENEER OR PLYWOOD
- B27D5/00—Other working of veneer or plywood specially adapted to veneer or plywood
- B27D5/003—Other working of veneer or plywood specially adapted to veneer or plywood securing a veneer strip to a panel edge
-
- 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
Definitions
- the present invention relates to a thick veneer edge made of wood, which has a multilayer structure.
- Thick veneer edges are used to attach to furniture parts, such as plates, sides, doors etc. to attach a border, which is suitable by its thickness that radii to the surface milled out or other profiles are made can.
- the corners For issuing the GS (tested security) mark e.g. in office furniture, the corners must have a radius of at least 3 mm. So rounded edges are considerably more pleasant to touch and creative contemporary.
- Thick veneer edges are called endless rolls and also offered as strip goods.
- a multi-layered system is known and launched on the market Thick veneer edge, at least two and up to over nine layers of conventional sliced or peeled veneer layered gluing brought to a desired thickness become. These thick veneer edges have among other things compared to a solid wood bander on the market established that through the layered structure a clear have greater flexibility compared to solid wood.
- An edge banding made of compressed is also known Wood of different thicknesses as a single or multi-layer Continuous roll or as a strip is offered.
- the technical The process of making upholstery is for different Applications known for several years.
- the technical effect The flexibility is based on the fact that the wood fibers be made conditionally movable against each other.
- Edge banding Made from compressed wood if properly carried out Compression to a very good degree in terms of Flexibility requirements.
- the edged edge banding have clear disadvantages, however, that in following should be listed.
- Upsetting wood edging are due to the elaborate technical The process of upsetting and the difficult choice of wood significantly more expensive than conventional thick veneer edging.
- Single-layer edging wood edging e.g. in a thickness of 3 mm, are mostly caused by sawing with corresponding sawing losses generated. The sawn surface can be compared difficult to grind to a paintable surface.
- Wood qualities can meet the existing visual requirements structural features are only taken into account to a limited extent.
- the object underlying the present invention was it to create a product that the usual loading and Processing properties of a market-launched Thick veneer edge and at the same time through a high flexibility the requirements of shaping and processing in the machine.
- Thick veneer is also said to be significantly cheaper than pure edging wood edging can be offered.
- the thick veneer edge according to the invention with the features of claim 1 points over the known approach the advantage of having a highly flexible thick veneer edge creates which, for example, as a band for furniture parts is suitable and technically a veneer edge is equal, which is made exclusively from compressed wood is, but which is much cheaper in price as such, only edging wood edging.
- the thick veneer edge according to the invention has a higher one Flexibility as a common thick veneer edge on which is already more flexible than solid wood.
- the flexibility is at least comparable to a single layer Thick veneer edge made of compressed wood. It is a better choice the visible and external veneers in terms of structure and grain possible (A quality), because 50% as the inside Find use (B quality).
- the upset wood can be measured by conventional means be produced lengthways or crossways, resulting in a higher output Compression wood can be obtained from every screed (loss of cut equals zero) than, for example, when sawing single-layer Solid wood edges (loss of cut with 3 mm thick edge always greater than 25%).
- the surface is at the knife smoother than when sawing, resulting in less grinding loss a paintable surface can be achieved.
- Upsetting wood has fluctuations in its processing due to different wood structure (knots, fiber deflections), that can lead to impairments such as less flexibility, poor milling of radii (tears), poor sandability of the surface, etc.
- the combined multilayer edge can change the wood quality in terms of technology and optics.
- Technical Fluctuations are made up of different ones Averaged layers. The millability for radii is much better thanks to the central area made of sliced veneers than with a single-ply edged wood edge.
- the processing of the upset wood before gluing a multilayer edge can be achieved by conventional machines respectively. All processing steps are possible (cutting, Joining, prongs), which is also the case with conventional sliced veneers can be carried out. Especially for that Galvanizing of the thin sliced veneers becomes endless no special machines for thick cut material required. The quality of the tines on the thin edge is much better. The milling of radii in the area of the tines is at the multilayer thick veneer edge according to the invention absolutely unproblematic.
- At least one front outer layer; at least one on the back Outer layer and at least one inner layer made of sliced veneer provided, with at least one of the front and rear outer layer made of compressed wood is.
- both are Outer layers made from compressed wood. This ensures double-sided flexibility.
- At least one of the front and back outer layers made of compressed wood and the inner layer or layers at least another outer layer made of compressed wood is provided.
- the Layer structure with regard to the thickness and / or the type of wood chosen symmetrical to the middle of the layers.
- the thickness and / or the type of wood chosen symmetrical to the middle of the layers.
- the Thickness share of the respective outer layer or outer layers on each side in the range of approx. 20%. This leads to a particularly favorable price / performance ratio.
- Connection of the layers provided elastic glue layers.
- S1, S2; S1 ', S2', S3 ', S4' a layer of compressed wood; M1, M2, M3 sliced veneer layers; VS, RS one Front or back; NS or NS 'a neutral Layer where the resulting stress is zero; D, D 'a Compressive stress and Z, Z 'a tensile stress.
- Fig. 1 shows a schematic cross-sectional view of a first embodiment of the thick veneer edge according to the invention.
- the front outer layer S1 is made of Compressed wood and the rear outer layer S2 made of compressed wood on the three inner layers M1-M3 made of sliced veneer glued.
- the multi-layer structure over layer-by-layer gluing this thick veneer corresponds to the production one usual thick veneer, which is made exclusively from sliced veneer is constructed.
- the upsetting layers S1, S2 can be sawn or sliced be, preferably the structurally more appealing Pages can be used as outside pages or visible pages.
- Fig. 2 shows a schematic cross-sectional view of a second embodiment of the thick veneer edge according to the invention.
- the combined thick veneer edge achieves its flexibility from the glued on both sides or one side on the outside Upset wood. This material can undergo deformation by stretching the outer radius and at the same time the inner radius is compressed. The upset comes this Deformation ideal and with no tendency to break at the same time low restoring forces.
- FIG. 3 shows a voltage diagram to illustrate FIG a homogeneous body in the case of stresses caused by deformation, 3a in the proportionality range and Fig. 3b in the area above the proportionality limit in Plastic deformation area.
- the combined thick veneer edge according to the present Embodiment are based on the neutral fiber NS also increase the tension towards the outside.
- a decisive difference from the homogeneous case is that when changing from sliced veneer to compressed wood, the amount of tension due to the higher elasticity of the compressed wood is significantly lowered to then at a lower level to rise again towards the outside.
- the inner layers of sliced veneer are in the Range of neutral fiber NS and have little to no To absorb forces.
- the firmness of normal sliced veneers is sufficient for that.
- the greatest forces occur outdoors on and are there from the well deformable Compressed wood, so that overall lower tensions than with solid wood or a common thick veneer edge occur. This in turn affects low restoring forces out.
- the voltage curve is qualitatively the same, whereby again the Tension amounts outside by using the Compressed wood are significantly reduced. Hence it comes down to essential to break later.
- the resulting pressure stress in the The inner or middle area of the thick veneer edge is covered by Deformation / compression of the sliced veneers added. Possibly plastic deformations of the knife veneers M1 to M3 do not lead to external destruction of the multilayer Thick veneer edge.
- the flexibility of the edge does not only result from the properties of the compressed wood, but also from the flexibility the glue joints when layered or layered Structure of the thick veneer edge.
- a special one PVAc white glue used PVAc stands for polyvinyl acetate.
- PVAc stands for polyvinyl acetate.
- the flexibility of the Glue layer shear forces are absorbed by the Deformation between the layers or layers occur. in the microspic scale enables a shift in position.
- the flexibility of the glue joint already results the greater flexibility of a common thick veneer edge compared to ordinary solid wood.
- Table I below shows further examples of the thick veneer edge according to the invention for achieving material thicknesses customary on the market.
- Upset wood Upset wood Upset wood Upset wood Upset wood 0.85 0.85 0.85 Sliced veneer Sliced veneer Upset wood 0.58 0.58 0.85 0.58 Sliced veneer Upset wood Sliced veneer 0.58 0.85 0.58 Sliced veneer 0.85 0.58 Upset wood 0.85 Upset wood 0.85 Upset wood 0.85
- the structure can vary depending on the thickness or stress become. In particular, you can build thicker thick veneers both the inner layers or middle layers as well the outer layers or outer layers of compressed wood in the Number can be increased.
- the structure of the multilayer thick veneer edge can be symmetrical can be selected, even with different layer thicknesses of the individual layers compared to those in the table above specified thicknesses.
- the tendency of solid wood to Discard and bowl is due to such symmetry and Layer structure suppressed itself.
- Different final thicknesses are expediently achieved via different number of layers or number of layers on conventional sliced veneers in the central region of the layer structure.
- several outer layers made of compressed wood could also be used. It can be assumed that a piece of up to two pieces of about 20% of the total thickness (front and back) is sufficient for maximum flexibility, since the greatest bending deformation and thus bending stress is present in the outer area, as can be seen from FIGS. 3a and b .
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Manufacturing & Machinery (AREA)
- Veneer Processing And Manufacture Of Plywood (AREA)
- Laminated Bodies (AREA)
Abstract
Description
- Fig. 1
- eine schematische Querschnittsansicht einer ersten Ausführungsform der erfindungsgemäßen Starkfurnierkante;
- Fig. 2
- eine schematische Querschnittsansicht einer zweiten Ausführungsform der erfindungsgemäßen Starkfurnierkante; und
- Fig. 3
- ein Spannungsdiagramm zum Illustrieren von auf einen homogenen Körper bei Deformation einwirkenden Spannungen, und zwar Fig. 3a im Proportionalitätsbereich und Fig. 3b im Bereich oberhalb der Proportionalitätsgrenze bei plastischer Verformung.
Dicke 3,1 mm | Dicke 2,6 mm | Dicke 2,1 mm | Dicke 5,5 mm |
Stauchholz | Stauchholz | Stauchholz | Stauchholz |
0,85 | 0,85 | 0,85 | 0,85 |
Messerfurnier | Messerfurnier | Messerfurnier | Stauchholz |
0,58 | 0,58 | 0,58 | 0,85 |
Messerfurnier | Messerfurnier | Stauchholz | Messerfurnier |
0,58 | 0,58 | 0,85 | 0,58 |
Messerfurnier | Stauchholz | Messerfurnier | |
0,58 | 0,85 | 0,58 | |
Stauchholz | Messerfurnier | ||
0,85 | 0,58 | ||
Messerfurnier | |||
0,58 | |||
Stauchholz | |||
0,85 | |||
Stauchholz | |||
0,85 |
BEZUGSZEICHENLISTE: | |
S1, S2; S1', S2', S3', S4' | Stauchholzschicht |
M1, M2, M3 | Messerfurnier |
VS, RS | Vorderseite, Rückseite |
NS; NS' | neutrale Schicht |
D, D' | Druckspanung |
Z, Z' | Zugspannung |
Claims (8)
- Starkfurnierkante aus Holz, welche einen mehrschichtigen Aufbau aufweist, mit mindestens einer Außenschicht (S1, S2) aus Stauchholz und mindestens einer weiteren damit verleimten Schicht (M1-M3) aus Messerfurnier.
- Starkfurnierkante aus Holz nach Anspruch 1, gekennzeichnet durch mindestens eine vorderseitigen Außenschicht (S1; S1'); mindestens eine rückseitigen Außenschicht (S2; S4'); und mindestens eine Innenschicht (M1-M3) aus Messerfurnier; wobei mindestens eine der vorderseitigen und rückseitigen Außenschicht aus Stauchholz gefertigt ist.
- Starkfurnierkante nach Anspruch 2, dadurch gekennzeichnet, daß beide Außenschichten (S1, S2) aus Stauchholz gefertigt sind.
- Starkfurnierkante nach Anspruch 2 oder 3, dadurch gekennzeichnet, daß mehrere Innenschichten (M1-M3) aus Messerfurnier vorgesehen sind.
- Starkfurnierkante nach einem der vorhergehenden Ansprüche 2 bis 4, dadurch gekennzeichnet zwischen mindestens einer der vorderseitigen und rückseitigen Außenschicht aus Stauchholz und der bzw. den Innenschichten (M1-M3) mindestens eine weitere Außenschicht (S2', S3') aus Stauchholz vorgesehen ist.
- Starkfurnierkante nach einem der vorhergehenden Ansprüche 2 bis 5, dadurch gekennzeichnet, daß der Schichtaufbau hinsichtlich der Dicke und/oder der Holzart symmetrisch zur Mitte der Schichten gewählt ist.
- Starkfurnierkante nach einem der vorhergehenden Ansprüche 2 bis 6, dadurch gekennzeichnet, daß der Dickenanteil der jeweiligen Außenschicht oder Außenschichten auf einer jeweiligen Seite im Bereich von ca. 20% beträgt.
- Starkfurnierkante nach einem der vorhergehenden Ansprüche 2 bis 7, dadurch gekennzeichnet, daß zwischen den Schichten elastische Leimschichten aufgebracht sind.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1999151035 DE19951035C1 (de) | 1999-10-22 | 1999-10-22 | Starkfurnierkante |
DE19951035 | 1999-10-22 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1093896A2 true EP1093896A2 (de) | 2001-04-25 |
EP1093896A3 EP1093896A3 (de) | 2005-04-06 |
Family
ID=7926601
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00122317A Withdrawn EP1093896A3 (de) | 1999-10-22 | 2000-10-20 | Starkfurnierkante |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1093896A3 (de) |
DE (1) | DE19951035C1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008026468B4 (de) | 2008-06-03 | 2013-06-20 | Polykarp Schnell Gmbh | Stützkante oder Umleimer mit mehreren übereinander geschichteten Furnierstreifen aus Holz und Verfahren zu dessen Herstellung |
WO2014060413A1 (de) | 2012-10-18 | 2014-04-24 | Ostenbach Gmbh | Furnierholzmehrschicht |
DE102022116591A1 (de) | 2022-07-04 | 2024-01-04 | Homag Gmbh | Verfahren zum Beschichten von Schmalflächen eines Werkstücks sowie Werkstück |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB485363A (en) * | 1936-11-11 | 1938-05-18 | Alfons Schmeing | Improvements in laminated wood structures |
DE19540371A1 (de) * | 1995-10-30 | 1997-05-07 | Polykarp Schnell Gmbh & Co Kg | Verfahren zur Herstellung einer im Kantenbereich mit einer Echtholzleiste profilierten Platte und eine Echtholzleiste hierfür |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1528108A1 (de) * | 1966-01-07 | 1970-09-24 | Klink Furnier Werk Heinrich Kl | Furnier |
DE3613440A1 (de) * | 1986-04-21 | 1987-10-29 | Michael Hackl | Verfahren und vorrichtung zum verleimen oder verkleben von kantenleisten aus massivem holz |
-
1999
- 1999-10-22 DE DE1999151035 patent/DE19951035C1/de not_active Expired - Fee Related
-
2000
- 2000-10-20 EP EP00122317A patent/EP1093896A3/de not_active Withdrawn
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB485363A (en) * | 1936-11-11 | 1938-05-18 | Alfons Schmeing | Improvements in laminated wood structures |
DE19540371A1 (de) * | 1995-10-30 | 1997-05-07 | Polykarp Schnell Gmbh & Co Kg | Verfahren zur Herstellung einer im Kantenbereich mit einer Echtholzleiste profilierten Platte und eine Echtholzleiste hierfür |
Also Published As
Publication number | Publication date |
---|---|
EP1093896A3 (de) | 2005-04-06 |
DE19951035C1 (de) | 2001-04-26 |
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