Device and method to press edge of building panel and building panel with pressed edges

FIELD: construction.

SUBSTANCE: device for production of a building panel with pressed and rounded edges comprising a pressing element with a lubricating device that supplies lubricant into the pressing zone, a heating accessory.

EFFECT: invention will make it possible to increase efficiency of manufacturing floor panels with the rounded edge.

21 cl, 7 dwg

 

The present invention in General relates to a device and method of pressing edge building panels, especially floor panels, which are the core of the wood fibers and the decorative layer, for forming the edges with a rounding. More specifically, the present invention relates to construction panels made with the inner castle with pressed edges located below the surface of the panel. The invention relates to panels with edges and to a method and device for the production of such panels.

In particular, but not exclusively, the invention relates to a device and method for the production of laminated floor panels with a rounded and pressed edge. However, the invention also relates to building panels in General. More specifically, the invention relates to the type of flooring panels with the core-based wood fibers, such as HDF, MDF (fiber, high density, medium density fiber)boards of pressed sawdust, plywood, decorative layer and a mechanical locking system for horizontal and/or vertical locking, and these panels are formed by the above method and device.

Device, method, and gender panel of this type is presented in document WO 2006/088417, which describes a device and method for pressing the edges of the laminated floor is Annelie to ensure laminated floor panels with rounded edges, looks like a single wood sex panel with beveled edges.

The present invention is an improved device and method for the production of building panels, particularly flooring panels with a rounded edge, made in one piece with a decorative layer, which can be manufactured at high speed. The invention also can produce deeper rounded edge compared with the existing technology.

An additional object of the present invention is the production of building panels, comprising a decorative layer and a rounded edge using the specified device and method.

Device, method, and gender panel of this type is known from patent WO 2006/088417, which describes a device and method for pressing the edges of laminated floor panels so as to form a laminated floor panel rounded edge. The known device includes a device for heating and a device for pressing the edges of the panel.

The known method includes the following steps:

The application of a decorative layer on the core for forming a building element.

Cutting building element construction panel.

The application of heat and pressure to the surface of the edge of the building panel, so that the core under the decorative layer clutched the camping and that the surface layer was continuously extracted toward the rear side of the engine.

The disadvantage of this known device and method is that there are cracks in the decorative layer, if the pressure is applied too quickly or if the compression ratio is too high.

The first objective of the present invention is to provide an improved device. The device according to the present invention includes a device for heating the device for pressing and lubricating device for lubricating device for pressing, which allow construction panels with high speed.

Mainly a device for pressing is rotating and is designed to rotate during the application of pressure to the edge of the building panel.

Preferably the lubricating device is designed to apply a lubricating additive to the device for pressing. Lubricity additive may be thick or thin, so that it can be removed easily with a decorative surface. It is preferable Teflon oil, but you can also use mineral or organic oil with the same liquid and lubricating properties, which can be easily removed with a decorative surface.

Preferably the device for heating includes an IR (infrared) heating element. In predpochtite the flax execution heats the device for pressing.

Preferably the shape of the device for pressing includes elliptical groove with the greater axis in a plane parallel to the decorative surface and correspondingly lower axis in the plane perpendicular (vertical) to the decorative surface. In this case, the tilt seems great (deeper).

Preferably the surface of the polished tool. As a result, lower the friction between the decorative surface and a device for pressing that reduces cracks in the decorative surface.

The second objective of the present invention is the provision of improved method of manufacture of building panels with extruded edge. The method includes:

Heating of the edges of the building panel.

Grease the edges of the building panel or device for pressing.

Pressing the edge of the building panel with a device for pressing.

Mainly the method also includes heating the device for pressing.

Preferably the method includes moving a building panel of the device for pressing by means of the conveyor. The conveyor speed is preferably more than 50 m/min or more, preferably 100 m/min or higher. A third objective of the present invention is to provide an improved building panel C is rounded edge, produced by the above device and method. Construction panel preferably has an elliptical outer edge. Mainly the kernel on the round edge is compressed more than 0.5 mm, and most preferably more than 0.7 mm, the Preferred range of the compression ratio is from 0.5 mm to 1 mm Using the method and device in accordance with the invention, it is possible to make the pressing at such great depths without cracks on the decorative surface. Building panels with a rounded edge described in the patent WO 2006/088417. In patent WO 2006/088417 are two primary types of rounded edges, old type, which includes the cutting of the edge from the edge of the building panel or pressing the entire construction panel at rounded education, and a new type when pressing on the edges. Two types may look the same, but the new type is a compressed kernel with higher density at the edges. In patent WO 2006/088417 also described measurement method to distinguish between these two types. Construction panel made in accordance with the invention, can be distinguished from the old type panel using the method of measurement described in the patent WO 2006/088417 and from new type on the effect of reduction or absence of cracks in the decorative surface on the rounded edge. The difference is more noticeable with increasing radius and the degree of compression.

All the links on a single element, device, component, means, step, etc. should be understood as "at least one" element, device, component, means, step, etc. unless explicitly stated otherwise.

The invention is illustrated in the drawings, where:

Figures 1A-device and method in accordance with known technology.

Figure 2-3 is a variant of the construction panel in accordance with the invention.

Figure 4 - option exercise device and method in accordance with the invention.

Figure 5 is a variant of the pressing tool in accordance with the invention, for pressing and forming the edge of the building panel.

As the invention shown in Figures 2-5, it concerns a device and method of manufacture of building panels with extruded rounded edge, as well as construction panels produced using the above device and method.

Device and method for the production of building panels with extruded and a rounded edge in accordance with the prior art shown in Figa-1C. In Figures 2 and 3 show the performance of building panels in accordance with the invention, produced according to the invention and equipped with well-known mechanical locking system.

In Figures 1A-C shows the three steps of the method of providing molded edges in accordance the with the previous prior art. Figure 1A presents the construction element, which in the next step, see Figure 1b, is cut into two construction element (2, 2') and provided with edge grooves (6, 6'). Construction element includes a core (3) of a material based on wood fibers is preferably HDF, MDF (fiber, high density, medium density fiber), or DSP, as well as the decorative surface (4) wood veneer or laminate comprising a sheet of paper and a resin or decorative imprinting, and a rear layer (5). Mechanical locking system, which can be performed at a later stage, shown by the dashed line. In the second step, the edges of the applied heat using the devices for heating (8). In the third step, shown in Figure 1C, the tool for pressing (9) compresses the core on the edge of the building panel and forms a rounded shape (10, 10').

The Figure 2 shows an embodiment of the invention, including the combination of two flooring panels (1, 1') with compressed and rounded edges (10, 10'). Shows an example of a mechanical locking system for vertical and horizontal locking. Horizontal locking system includes a locking strip (23)that extends horizontally from the edge (24b, 25b) of the first floor panel (1) and is provided protruding upward locking element (26)which is combined with the locking ka is avcoi (27), below the edge and on the edge (24A, 25A) of the second floor panel (1'). Vertical locking system comprises a tongue (21) on the edge (24b, 25b) of the first panel and the groove of the tongue (21) on the edge (24A, 25A) of the second floor panel (1"). Any type of locking is possible, for example, vertical only, horizontal only, reed constipation (see patent WO 02/055810), and can also be added to the glue.

The Figure 3 shows an embodiment of a floor panel, is provided with a mechanical locking system and rounded edges (10, 10') along the long sides and a decorative groove (30) along only one of the opposite short sides (25A, 25b).

An embodiment of the device and method in accordance with the present invention is illustrated in Figure 4. The device includes a conveyor (40) for movement of construction panel (2) to the heating device (8). Heating device, such as an infrared heating element arranged to heat the edge of the construction element. In the second step, the conveyor moves the building panel to a pressing element for pressing the edges of the building panel. Preferably both opposite edges are heated and then pressed simultaneously rotating the pressing element. The device also includes a lubricating element (41), designed for use lubricity additives, it is preferable to press the current element or to the edge of the building panel. Preferred lubricating additive is Teflon oil, but it is also possible the use of mineral or organic oils with the same liquid and lubricating properties, which is easily removed from the decorative surface. To further reduce friction surface of the pressing tool can be ground and/or subjected to vacation. As an example, as the material for the pressing element can be used tempered steel with a hardness of 30-40 HRC, subjected retracements to approximately 60-70 HRC and polished to a roughness of about 0.2 Ra. For a vacation can also be used the other way, which is achieved hardness of approximately 3000-4000 Vickers. Generally speaking, it is desirable to use a firmer and more smooth press element, but this leads to increased costs. For some materials of the decorative layer and the low range of pressing it is possible to eliminate the grease and to achieve the desired result by using polished and released the pressure element.

Mainly pressing element (9) may be provided with a groove round (50) or elliptical form (51, 52), which creates a corresponding circular or elliptic shape of the rounded edge of the building panel. When elliptical shape achieves the op is practical effect, that rounded edge look deeper, if the radius of the ellipse in the direction (a)parallel to the decorative surface, is greater than the radius of the ellipse in the direction (b)perpendicular (vertical) in relation to the decorative surface. The edge pressure element, close to the middle of the building panel, preferably has a rear corner (53).

The execution of the construction panel, shown in figure 2, is made using the above described device and method in accordance with the invention, preferably includes a core made of a material based on wood, such as HDF, MDF (fiber, high density, medium density fiber) and the decorative layer from a laminate comprising a sheet of paper and a resin or decorative printed material, and this combination is suitable for pressing. You can also use the kernel from other materials based on wood such as particleboard or layered plywood, and other decorative surfaces, such as veneer. Mainly construction panel has a rear layer (5).

Mainly the kernel on the rounded end is pressed for more than 0.5 mm, and even better, more than 0.7 mm, the Preferred range of the compression ratio is from 0.5 mm to 1 mm is Also obviously possible to lower the compression ratio, and possible larger, but rounded or oblique to the AI, which looks natural. Using the method and device in accordance with the invention, obtained construction panel with such a high compression ratio without cracks in the decorative surface. Extruded edge can also have a direct part.

1. Device for manufacture of building panels (1, 2) with the extruded rounded edge (10)containing a heating device designed to heat the edge of the building panel and pressing element (9)that is designed to compress kernel (3) construction of the panel on its edge, characterized in that it comprises a device for lubrication (41)applying a lubricating additive in the pressing zone.

2. The device according to claim 1, wherein the lubricating additive is fed into the pressing element (9).

3. The device according to claim 1, wherein the lubricating additive is applied to the edge of the building panel.

4. Device according to any one of claims 1 to 3, in which the element (9) is rotatable and is made to rotate during the application of pressure to the edge of the building panel.

5. Device according to any one of claims 1 to 3, wherein the lubricating additive is Teflon oil.

6. The device according to claim 1, wherein the heating device comprises an infrared heating element.

7. The device according to claim 1, which includes a device for heating the pressing element.

<> 8. The device according to claim 1, in which the element (9) includes a groove elliptical or round shape (50, 51, 52), and a larger radius is in a plane parallel to the decorative surface, and the smaller the radius is in the plane vertical to the decorative surface.

9. The device according to claim 1 or 8, in which the surface of the pressing element polished.

10. The device according to claim 1 or 8, in which the surface of the pressing element is exposed to the release.

11. The device according to claim 1, in which the core (3) contains fibers of high density and medium density fiber.

12. The device according to claim 1, in which the decorative surface (4) is a wood veneer or a laminate containing resin.

13. The method of manufacture of building panels (1, 2) with a rounded edge, comprising the steps are carried out:
heating of the edges of the building panel (1, 2),
grease the edges of the building panel or pressing element (9) and
pressing the edge of the building panel by means of the pressing element (9).

14. The method according to item 13, which is heated pressing element (9).

15. The method according to item 13 or 14, in which the construction of the panel (1, 2) with respect to item (9) by means of a conveyor (40), preferably with a speed of 50 m/min or higher.

16. Construction panel, comprising a core (3) of the Mat is of real wood-based, decorative surface (4) and radius edge (10), produced with a device according to any one of claims 1 to 12 and/or using the method according to any of PP-15, characterized in that the edge is compressed to a depth (CD) of 0.5 mm or more.

17. Construction panel according to clause 16, in which its edge is compressed to a depth (CD) of 0.7 mm or more.

18. Construction panel according to clause 16, in which its edge is compressed to a depth (CD) in the range from 0.5 mm to 1 mm

19. Construction panel according to any one of p-18, which has a rounded edge (10) has the shape of an ellipse or circle.

20. Construction panel according to any one of p-18, in which the decorative surface (4) is a wood veneer or laminate containing resin.

21. Construction panel according to any one of p-18, in which the core (3) contains fibers of high density or medium density fiber.



 

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