DE102007062144A1 - Floor panel for use with central position carpet, has cover layer, sub-construction and slats that are arranged at distance to each other, where slats are connected by connecting mass - Google Patents

Abstract

The floor panel has a cover layer (2), a sub-construction and slats (6) that are arranged at a distance to each other. The slats are connected by a connecting mass. Joints (8) are provided between the overstretched slats or covered slats. The connecting mass is applied transverse to the joints.

Description

The The invention relates to a floor panel according to the preamble of claim 1, a method for producing a floor panel and a Mittellagenteppich for such a floor panel.

at high-quality interiors are often laid parquet floors, because they have a long life and secondly high demands on the aesthetics suffice. As described under www.HARO.de, a parquet floor consists of a Variety of parquet planks, which have a 3-layer or 2-layer structure can. In a 3-layer construction is a sealed or with an oil / wax finish provided precious wood layer on a middle layer of spruce solid wood sticks arranged, on the back in 3-layer construction a retreat veneer is arranged. This retreat veneer is usually off Softwood made.

at a special variant, which is used for full-surface bonding can be on the withdrawal veneer be dispensed with, so that a 2-layer structure with a cover layer made of precious wood and a base layer of solid wood sticks.

These Center layer or base layer consists of a variety of each other spaced solid wood sticks, usually made of spruce wood consist. This so-called Mittellagenteppich is in a separate Machinery produced and then with the topcoat and if necessary, the withdrawal layer pressed, the Mittellagenteppich transported for pressing must become. So the middle layer on its way to this compression does not fall apart, become common The bars fixed relative to each other with adhesive tape. These adhesive strips have the disadvantage that they are not shear resistant, so that the between the bars existing gaps by the shift during of transport to the compression can close.

you has already done experiments the center carpet with wires or to fix with a string. A disadvantage of this solution is that during the subsequent editing the risk of tool damage to the panels with a jigsaw or circular saw is available. Furthermore, the attachment of the wire or the string of a high production cost.

In contrast, lies The invention is based on the object, a floor panel, a method for Production of such a floor panel and to create a Mittellagenteppich, in which the individual bars with low Expense to be held in a predetermined relative position to each other can.

These Task is regarding the floor panel by the feature combination of claim 1, in terms of the method by the feature combination of claim 13 and in terms of Mittellagenteppichs solved by the combination of features of claim 16.

According to the invention the substructure of a floor panel from a plurality of mutually spaced rods - the so called Mittellagenteppich. The bars of this carpet become before the application of the cover layer connected to each other by means of a bonding compound, so that the relative arrangement of the bars can not change until the compression. By this measure is guaranteed that in the manufacture of Mittellagenteppichs between the individual rods Gaps remain a defined width, so that compared to solutions with adjacent bars or rods with smaller gaps much lower cost of materials is required.

at a solution according to the invention this compound compound for fixing the position of the bars strip-shaped transversely to the gaps applied.

These Relative positioning is especially safe when using multiple strips are spaced apart.

The Making the substructure is particularly easy if this Joining compound is applied to the top layer side.

at a preferred embodiment the compound compound designed as a hot melt adhesive applied via a nozzle or an applicator roll can be. This hot melt adhesive is preferably selected such that he cured in the or solidified state is shearing enough to during the Transport of the middle layer carpet to the subsequent processing cycle, for example, for pressing with a cover layer a predetermined To ensure joint.

These strip Bonding compound is preferably applied across the width of the rods, so that joints with a width of 0.5 mm to 3 mm, preferably between 1 mm to 2 mm.

The bonding compound can be applied in a particularly defined manner if depressions or recesses are to be accommodated in the rods least one part of the connecting mass are provided.

These Recesses extend in a preferred embodiment groove-shaped in parallel distance to each other.

The Invention can be used particularly advantageously in parquet with solid wood rods become.

This Parquet can be designed as a 3-layer or 2-layer parquet.

The Harden or solidification of the bonding compound and thus fixing the position of Bars to each other takes place in a variant of the method by convection or alternatively by curing or solidification and possibly embossing the bonding compound through a cooling roll.

With the method according to the invention let yourself in a simple way a Mittellagenteppich as an intermediate in to produce the floor panel production.

other advantageous developments of the invention are the subject of further Dependent claims.

in the The following will be a preferred embodiment of the invention explained in more detail with reference to schematic drawings. Show it.

1 the structure of a 3-layer parquet according to the invention;

2 a plan view of a Mittellagenteppich for a parquet according to 1 ;

3 a section along the line AA in 2 and

4 a section along the line BB in 2 ,

The Invention will be described below with reference to a 3-layer parquet. In principle, can be However, the invention also in 2-layer parquet or floor elements made of other materials where a substructure from a variety of rods consists.

According to the three-dimensional schematic representation in 1 has a parquet floorboard 1 a cover layer 2 from selected precious woods, with a middle layer 4 glued and pressed. This consists of a variety of center-layer rods 6 , which are arranged at a parallel distance from each other, so that between each two adjacent bars a gap or joint 8th remains.

On the lower side of the back of the parquet board is a Rückzugsfurnier 10 made of softwood. On the back of this retreat veneer 10 Furthermore, an insulation pad to minimize the impact sound insulation and to improve the thermal insulation may be attached. After pressing the middle layer 6 with the topcoat 2 and the retreat veneer 10 be at the longitudinal and front edges connecting profiles, such as a tongue and groove connection 11 or a so-called lock connection milled, as described in the aforementioned domain.

In the production of such a parquet board 1 first becomes the middle layer 4 produced on our own machinery. There are a variety of rods 6 positioned at a parallel distance from each other so that the joints 8th remain. These joints 8th contribute to a considerable material savings, the joint width b (see 2 ) should, however, be chosen so that a sufficient stability of the middle layer 6 is guaranteed. As an optimal compromise, a joint width b of 1 mm to 2 mm has been found. Of course, other joint widths are feasible.

So that this in 2 illustrated Mittellagenteppich from a variety of rods 6 with joints in between 8th during transport for pressing with the cover layer 2 and / or the retraction veneer 10 not displaced according to the invention are transverse to the joints 8th The hot melt adhesive strip 12 applied, each extending across the width of the bars 6 extend. The individual stripes 12 are spaced from each other, wherein the distance dimension is selected so that the ge desired shear stiffness is reached. Ie. The hotmelt adhesive is designed so that a change in the relative position when moving the center carpet according to 2 does not occur for compression. By each between two adjacent bars 6 arranged hot melt adhesive is also created a kind of buffer over which the rods 6 be reliably maintained at a constant joint width b at a distance from each other

According to the in 3 shown section along the line AA in 2 are for receiving the hot melt adhesive in the in 2 visible surface of the individual bars 6 wells 14 , For example, introduced about rectangular or semicircular grooves. These depressions 14 can be made for example by a circular saw or a milling cutter. Of course, another groove shape can be chosen instead of the rectangular groove. The hot melt adhesive will then enter the depression during manufacture of the center-roll carpet 14 introduced, wherein the hot melt adhesive - as in 3 indicated - not completely in the depression 14 must be included, but after can survive above or laterally.

As in particular from the in 4 illustrated section along the line BB in 2 shows, the hot melt adhesive fills the joint during application 8th or gap at least partially, wherein the viscosity of the hot melt adhesive is selected so that this in the molten state in the joint 8th flows and thus has a greater penetration depth T than the depth t of the recess 14 ,

The hotmelt adhesive consists for example of a duroplastic or thermoplastic material. After applying the hot melt adhesive, for example, from a nozzle or by rolling this is cured or solidifies this. The hardening or solidification can take place, for example, by convection cooling or by means of a cooling roll, with embossing or profiling of the strip simultaneously being effected by way of this cooling roll 12 is possible. After this hardening or solidification are the strips 6 the Mittellagenteppichs reliably positioned relative to each other, so that it can be transported to the next processing step without changing the joint width b. This process makes it possible to pre-produce the middle-layer carpet and then feed it from a warehouse or magazine during production of the parquet board.

In principle, can also be on the introduction of the wells 14 be dispensed with, leaving the strips 12 for fixing the position on the in 2 visible surface of the bars 6 be applied. In that case, the surface of the center ply carpet must be before applying the topcoat 2 however, be treated so that it rests flat.

In principle, it is also possible if the hot melt adhesive or other suitable bonding compound only in the joints 8th is arranged so that no continuous strip but short, linear one behind the other, the joints 8th overlapping strip sections are present. In this way, the consumption of hot melt adhesive can be further reduced, but there are higher demands on the hot melt dosing.

As already mentioned, can instead of a conventional one Hotmelt adhesive also provided other suitable curable material become.

Disclosed are a floor panel, a method for producing a floor panel and a Mittellagenteppich a floor panel, this being a plurality of spaced-apart rods has, by means of a curable Connecting compound shear-resistant connected to each other.

1

parquet board

2

topcoat

4

center position

6

Rod

8th

Gap

10

backing veneer

11

Tongue / groove connection

12

strip

14

deepening

Claims (16)

Floor panel with a top layer ( 2 ) and a substructure ( 4 . 10 ) with a layer ( 4 ) made of spaced-apart rods ( 6 ), characterized in that the rods ( 6 ) are connected to each other by means of a connecting mass and spaced from each other, said joints ( 8th ) between the bars ( 6 ) are overstretched or covered. Floor panel according to claim 1, wherein the bonding compound strip-shaped transversely to the joints ( 8th ) is applied. Floor panel according to claim 2, wherein a plurality of strips ( 12 ) are arranged at a distance from each other. Floor panel according to one of the preceding claims, wherein the bonding compound on the cover layer side of the rods ( 6 ) is arranged. floor panel according to one of the preceding claims, wherein the bonding compound is a hot melt adhesive. floor panel according to one of the preceding claims, wherein the bonding compound in a cured one or solidified state is shear resistant. Floor panel according to one of the preceding claims, wherein the bonding mass across the width of the rods ( 6 ). Floor panel according to one of the preceding claims, wherein the joints ( 8th ) are between 0.5 mm and 3 mm wide. Floor panel according to one of the preceding claims, with depressions ( 14 ) in the bars ( 6 ), in which the bonding compound is at least partially introduced. Floor panel according to claim 9, wherein several recesses ( 14 ) in parallel distance to each other. Floor panel according to one of the preceding claims, wherein the bars ( 6 ) are made of solid wood, HDF or plywood. Floor panel according to one of the preceding claims, with a retraction layer ( 10 ). Method for producing a floor panel ( 1 ) with one on a substructure ( 4 . 10 ) applied topcoat ( 2 ), wherein the substructure comprises a plurality of mutually spaced rods (US Pat. 6 ), comprising the steps of: - producing a middle layer carpet from a multiplicity of spaced-apart bars ( 6 ); Applying a curable or meltable bonding compound to the middle layer carpet in such a way that it can be applied in joints ( 8th ) between the bars ( 6 ) entry; Hardening or solidification of the bonding compound and application of a cover layer ( 2 ) and / or a withdrawal position ( 10 ). The method of claim 13, wherein the compound mass cured by convection or frozen. The method of claim 13, wherein the curing or Solidification of the bonding compound by means of a cooling roller. Central carpet for a floor panel, with a plurality of spaced-apart rods ( 6 ), which are interconnected by means of a curable or meltable bonding compound.