WO2004018184A1

WO2004018184A1 - Throughput method for the mechanical covering of large, wide furniture components

Info

Publication number: WO2004018184A1
Application number: PCT/DE2003/002724
Authority: WO
Inventors: Werner Farke
Original assignee: Nolte-Möbel Gmbh & Co.Kg
Priority date: 2002-08-16
Filing date: 2003-08-12
Publication date: 2004-03-04
Also published as: AU2003260269A1; DE10392832D2

Abstract

The invention relates to a throughput method for the mechanical covering of especially profiled, wide furniture components (4) with an authentic wood veneer (7,14) wherein sliced veneer is laminated on an elastic carrier as an endless strip, wound and cut into lengths as a veneer roll (7,14). The veneer roll (7,14) is then provided with glue on one side and placed by means of deflection rollers along the entire length and two longitudinal edges (12) of the profiled furniture component(4). The veneer (7,14) is then positioned and pressed in sections, including said profiled sections, by a plurality of press rollers (11,18,20), whereupon a profiled flat furniture component is obtained, said component comprising at least one flat side (5,9) and two opposite longitudinal sides (12) including the anticipated profiles which are fully provided with real single-piece wood veneer.

Description

Continuous process for the mechanical sheathing of profiled, wide furniture components

Description :

The invention relates to a pass experienced for machine sheathing, in particular profiled, wider

Furniture components with a real wood veneer and the furniture components themselves encased using this process.

The surface finishing of furniture or furniture components by covering with a real wood veneer of a comparatively valuable wood has long been known and proven. For example, mahogany, walnut, oak or rosewood are used, which expensive veneers are usually only made in a small thickness between 0.5 mm and 0.7 mm. Veneers of this type of wood are mostly produced as sliced veneers, since in the case of layer-by-layer removal of sliced veneer from a wooden block softened by steaming, veneers ensure favorable wood yield and their thickness can be up to approximately 2 mm.

According to the manufacturing process, a further distinction is made between peeled veneers, usually bulk goods up to 1.8 mm thick, during the manufacture of which a pre-steamed block is also clamped in a veneer peeling machine or circular peeling machine and rotating against it fixed knife is guided. Less common today are the up to 3 mm thick sawn veneers, which are made on veneer frames or Hamburg saws.

Unlike printed films or the like for covering a furniture component, for example, from one

Fibreboard material is a real wood veneer comparatively thick, stiff, and brittle and unsuitable for tight rolling. That is why a furniture component is covered with a real wood veneer mechanically only on a flat level in a pressing process. Profiling in particular had to be documented separately, which is often only possible by hand.

As a result, profiled furniture components of this type, for example furniture fronts, were covered with a large number of individual pieces of veneer, some with different colors and / or structures, that high rejects had to be accepted during production and thus increased workload, which meant a relatively high level of work

Unit prices went hand in hand.

In the event of complaints or damage to individual furniture components, for example in a furniture front, this entire front usually had to be replaced, as the

Veneer patterns for replacement parts could differ considerably.

Against this technical background, the invention sets itself the task of a method for sheathing a

To provide furniture component, in particular also a furniture component itself, in which veneers have hardly any different colors or structures, and in which, in particular on the application, additional veneer pieces even when the furniture component is profiled can be dispensed with, the component may also have a comparatively large width.

This technical problem is solved in a continuous process for the mechanical sheathing in particular of profiled, wide furniture components with a real wood veneer. of claim 1 solved by the method steps that sliced veneer laminated on an elastic support as an endless belt, wound and cut to length as a roll veneer, that the roll veneer is provided on one side with an adhesive over deflection rollers in particular over the entire width and two longitudinal edges on the profiled furniture component and is positioned and pressed in sections by a plurality of pressure rollers including the profiles.

The provision of the sliced veneers on an elastic support as an endless belt allows the use of very thin real wood veneers, so that the roll veneer can be wound up in a film in a comparable manner and made available for the sheathing of a furniture component.

The roll veneer is very carefully provided with an adhesive, especially a hot glue, in one

Sheathing device, for example comparable to that known from DE 124926, applied to the furniture component, the entire width and two connected longitudinal edges in particular being covered in one operation, including the profiling provided there.

A large number of pinch rollers with different axes also ensures exact positioning and sufficient pressure. As a result of these measures, furniture components, for example furniture fronts, are covered over the entire width and length, in particular including two longitudinal edges and existing profiles of only one piece of veneer, with which individual applications are dispensed with. This means that furniture components with real wood veneers can be produced inexpensively in large quantities with only small rejects, whereby the structure and color of the veneers are largely in harmony.

In the method according to the invention, it is further provided that peeled veneers of the same dimensions are glued to a block under pressure and that cut veneers are removed from the block, it being further preferred that these cut veneers are glued to a second block under pressure and that of the block second block, the second sliced veneers to be laminated on the elastic support are removed.

Peeled veneers made of comparatively inexpensive wood, for example poplar wood, can be produced inexpensively. A particularly high degree of homogeneity with regard to the color tone and the structure of the veneer is further achieved by the in particular multiple gluing to blocks and the subsequent removal of sliced veneers. This means that entire series of fronts, for example, can be covered with a real wood veneer that have a uniform color and, in particular, damaged furniture components can also be easily replaced even after a long period of time, since the color and structure remain largely the same regardless of the material.

It can also be expediently provided that the length of the sliced veneer to be laminated corresponds to the width of the roll veneer. Because of this measure, you can large widths can be achieved, for example of over 60 cm, which is usually sufficient in the furniture industry. Sliced veneers created on conventional sliced veneer machines can thus be used in the method according to the invention.

A nonwoven, in particular one of 23 to 25 g, is preferably used as the elastic carrier, which is laminated on in two work steps. This fleece is expediently colored in accordance with the veneer color so that it is not noticeable. In particular, the fleece lamination allows the upper side to be sanded, for which purpose the roller veneer is expediently used. After sanding, the thickness of the roll veneer is still preferably about 320 micrometers, so it is comparatively thin. A top coating with an elastic lacquer, in particular a UV-resistant, two-layer lacquer smoothes and seals the veneer surface on the visible side.

Today, fiberboard is mostly found in the furniture industry

Use, an inexpensive starting material that is not very suitable for a clean profile. It is therefore provided that the furniture component has a base support made of a fiberboard material, that a groove is made in the base support, and that an especially profiled MDF strip is glued into the groove. Medium density fiberboard material is much more suitable for profiling than the commonly used fiberboard material. The cross section of such an introduced MDF strip can be approximately 115 x 16 mm ² .

Due to the uniform, continuous covering of at least one side of the furniture component with a real wood veneer, the MDF strip used, in particular a profiled one Rectangular bar, not recognizable as a separate component.

The mechanical sheathing is expediently carried out in a sheathing device such as is known in principle, for example, from DE 124926. When passing through this device, the surfaces extending in the direction of the pass are preferably covered with veneers, preferably in the wrapping device first covering a substantially smooth, flat underside with a veneer and then a particularly profiled upper side and the two longitudinal edges, in particular the top and longitudinal edges can also be covered in one operation.

Only the end faces then still need veneer, if necessary. by hand.

In a preferred embodiment, at least one MDF strip is glued, profiled and sanded into a base carrier made of a fiberboard material, the sliced veneer is laminated on a non-woven fabric, sanded and lacquered rolled up as a roll veneer and the roll veneer is made in the continuous process from above and / or placed below, with precise feeding and an even application of adhesive, the roll veneer being applied over a long pressure zone with short pressure roll spacings, the roll veneer being separated according to the length of the furniture components and veneer protrusions being removed. The removal can, for example, be carried out very precisely by means of milling cutters and / or knives, if necessary. The roll veneer can be separated and protrusions removed in one step. In this way, an especially profiled, flatly extending furniture component is obtained, in which at least one flat side and two opposite longitudinal sides, including the intended profiles, are completely covered with a one-piece real wood veneer according to the method. In particular, both flat and two opposite long sides are completely covered with two pieces of real wood veneer.

The real wood veneer can be an inexpensive poplar veneer that can also be bleached and dyed. The color of the fleece will then be adapted accordingly to that of the veneer.

The invention is explained in more detail with reference to the drawing, in which a side view of a sheathing device is shown only schematically in the single figure.

The sheathing device 1 has a roller conveyor 3 provided with driven rollers 2, on which plate-like furniture components 4 are successively fed to a sheathing with a veneer.

In particular, the top 5 of the furniture components 4 can be profiled, for example by inserting a profiled MDF strip, for example in a groove in the furniture component 4 made of a fiberboard material.

The furniture components 4 are precisely positioned and preferably also exactly in a predetermined cycle

Roller conveyor 3 is fed to a first station 6 for covering with an endless roller veneer 7.

The roll veneer can be a poplar peeled veneer that has been bleached and colored. Then be Peeled veneers of the same dimensions are bonded under pressure to a first block, from which cut veneers are removed, which in turn are bonded under pressure to a second block, from which cut veneers are removed again. These sliced veneers are laminated on an elastic support to form an endless belt. Such a carrier can be a fleece of 23-25 g, applied on both sides, which has been color-matched to the colored real wood. Grinded to a thickness of preferably 320 μm and provided twice with an elastic UV lacquer, such a roll veneer 7 of a film is comparable available for covering the furniture components 4.

In the first station 6, the rear side of the roll veneer 7 is coated in a coating station 8, preferably with a hot glue which, after placing the veneer on the furniture component 4, allows the veneer 7 to be positioned for a short period of time.

The substantially flat underside 9 of the furniture component 4 with the veneer 7 placed on it passes through a zone 10 with pressure rollers 11 with horizontal axes of rotation. Sometimes. In the first station, the furniture component 4 can be sheathed in such a way that the longitudinal sides 12 extending in the direction of passage are also sheathed. The zone of the pressure rollers 9 must then be extended accordingly, so that the veneer 7 can be folded and pressed against the longitudinal sides 12.

In a second station 13, the top 5 and expediently the two long sides 12 are covered with a further roll veneer 14. As in the first station 6, this is carried out against the direction of travel of the furniture components 4, if necessary. via a clamping device 15 a fed to another coating station 16 for a hot glue application and deflected deposited on the profiled top 5 of a furniture component 4.

In a zone 17 adjoining in the direction of flow

Pressure rollers 18 of essentially horizontal axes are initially pressed, usually starting from the longitudinal center line, of the applied veneer 14. Via profiled profiles in the top 5 of the furniture component 4, in which area the axes of the pressure rollers 18 can also be employed more and more , In a further adjacent zone 19, the long sides 12 of the furniture component 4 are also provided with the veneer 14. Accordingly, the orientation of the axes of rotation of the pressure rollers 20 towards the end of the zone 15 is substantially vertical.

Appropriately cut to length and freed from protrusions, a profiled, flatly extending furniture component 4 is obtained, in which both flat and two opposite longitudinal sides are completely covered with only two pieces of real wood veneer, the width of the furniture components 4 being able to be more than 60 cm.

Claims

1. Continuous process for the mechanical sheathing in particular of profiled, wide furniture components (4) with a real wood veneer (7, 14), characterized in that

- sliced veneers laminated on an elastic support as an endless belt, wound up and cut to length as roll veneer (7.14),

- That the roll veneer (7, 14) is provided on one side with an adhesive via deflection rolls, in particular over the entire width and two longitudinal edges (12) on the profiled furniture component (4) and - in sections by a plurality of pressure rolls (11, 18, 20) is positioned and pressed, including the profiles.

2. The method according to claim 1, characterized in that peeled veneers of the same dimensions under pressure to one

Block are glued and that cut veneers are removed from the block.

3. The method according to claim 2, characterized in that the sliced veneers under pressure to form a second block are glued and that from the second block the second sliced veneers to be laminated on the elastic support are removed.

4. Method according to one or more of the preceding

Claims, characterized in that the length of the sliced veneer to be laminated corresponds at least to the width of the roll veneer.

5. Method according to one or more of the preceding

Claims, characterized in that the elastic carrier is a fleece.

6. The method according to one or more of the preceding claims, characterized in that the roll veneer (7, 14) is ground on the upper side.

7. The method according to one or more of the preceding claims, characterized in that the roll veneer (7, 14) is provided on the top with an elastic varnish.

8. The method according to one or more of the preceding claims, characterized in that the furniture component (4) has a base support made of a fiberboard material, that a groove is made in the base support and that in particular a profiled MDF strip is glued into the groove.

9. Method according to one or more of the preceding

Claims, characterized in that the furniture component (4), in particular profiled, in one pass through a sheathing device (1) on the surfaces (5, 9, 12) extending in the direction of the pass Veneer (s) (7.14) is occupied.

10. The method according to one or more of the preceding claims, characterized in that in the sheathing device (1) first a substantially smooth-extending underside (9) is covered with a veneer (7) and then an especially profiled top ( 5) and the two longitudinal edges (12).

11. The method according to one or more of the preceding claims, characterized in that at least one MDF strip is glued, profiled and sanded in one pass in a base carrier made of a fiberboard material

Sliced veneers are laminated on a fleece, sanded and varnished, rolled up as roll veneer (7,14), that the roll veneer (7,14) is placed in a continuous process from above and / or below, with precise feeding and even application of adhesive, that The roll veneer (7,14) is applied over a long pressure zone (10,17,19) with short pressure roll distances and that the roll veneer (7,14) is separated according to the length of the furniture components (4) and veneer protrusions are removed.

12. In particular profiled, flatly extending furniture component, characterized in that at least one flat side (5; 9) and two opposite longitudinal sides (12) including the proposed profiles are completely covered with a one-piece real wood veneer according to the method according to one or more of the preceding claims.

13. Furniture component according to claim 12, characterized in that both flat (5,9) and two opposite longitudinal sides (12) are completely covered with two pieces of real wood veneer.

14. Furniture component according to one or more of claims 12 to 13, characterized in that the real wood veneer is a poplar veneer.

15. Furniture component according to one or more of the preceding

Claims, characterized in that the poplar veneer is bleached and colored.