EP2531331A1

EP2531331A1 - Methods and installation for producing a particle mat from at least one spread layer and a particle mat to be pressed in a press during the production of wood particle boards

Info

Publication number: EP2531331A1
Application number: EP11710668A
Authority: EP
Inventors: Gernot Von Haas; Peter Rath; Reinhard Schwinn
Original assignee: Dieffenbacher GmbH Maschinen und Anlagenbau
Current assignee: Dieffenbacher GmbH Maschinen und Anlagenbau
Priority date: 2010-02-05
Filing date: 2011-02-05
Publication date: 2012-12-12
Anticipated expiration: 2031-02-05
Also published as: EP2531331B1; DE102010001649A1; CN102802895B; WO2011095356A1; CN102802895A

Abstract

The invention relates to methods and an installation for producing a particle mat (7) from at least one layer of particles (9) on a continuously revolving forming belt (8) by means of at least one spreading head (1) during the pressing of the particle mat (7) in a press (22) to give a material board. The particles (9) are discharged as a material flow (24) with a substantially even metering weight per unit area (DFG) across a width (B1) at a right angle and with a length (L) in the direction of production (11) of the forming belt (8) by means of a metering device (15) and are spread onto the forming belt (8) across a width (B2) in an oriented and/or non-oriented manner by at least one spreader (14). At least one mechanical guiding device (5) between the metering device (15) and the spreader (14) moves the particles (9) in the material flow (24) at least to some extent substantially at a right angle to the direction of production (11) of the forming belt (8) and/or stabilizes the particles (9) in the material flow (24) to at least some extent in its movement in the direction of movement (12). The invention further relates to a particle mat to be pressed in a press (1400).

Description

Method and plant for producing a spreading material mat from at least one scattered layer and a spreading material mat for pressing in one

The invention relates to a method for producing a spreading material mat from at least one scattered layer for pressing in a press in the course of the production of wood-based panels according to the preamble of

Claim 1, a plant for producing a grit mat of at least one scattered layer for pressing in a press in the course of the production of wood-based panels according to the preamble of

Claim 16 and a spreading material mat for trimming and / or, preferably subsequent, pressing in a press in the course of the production of wood-based panels according to claim 23. In the production of material panels from scatterable materials, a mixture of particles or fibrous materials and a binder to a Scattering mat scattered on a forming or conveyor belt, the grit mat is then fed to any necessary pretreatment and finally a compression. In this case, usually discontinuous floor presses and continuously operating presses are used, wherein in the latter between two rotating steel belts a scattered pressed material mat is pressed with glued scattering particles under pressure and heat input. In addition to the pure particle plates (MDF)

CONFIRMATION COPY wood chips are also used, which are usually oriented and scattered in order to increase the strength and strength of the wooden boards made in length and width. It will be

Types of fabrication differed for oriented scattered plates in the longitudinal and transverse direction (OSB) and in the orientation purely in the longitudinal direction (OSL). Usually, such OSB and OSL boards are produced on continuous double belt presses or cycle presses.

In today's production of material plates of the following types of spreading material mats are created, which are then pressed:

- Spreading mats with uniform basis weight in length and width

- Spreading mats with Längsranderhöhungen the basis weight in order to compensate during transport losses of material or loss of density in the edge regions by bulging of the grit mat during compression.

- Spreading mats with different basis weight contours in length and width, which usually after a scattering head and the preparation of a homogeneous grit mat with uniform basis weight in a separate subsequent device in

Production direction continuous and / or spaced over the width tracks of additional material or removed by means of removal devices from the grit mat. The previous applications for grit mats with a differentiated over length and width basis weight profile and their mechanical or plant engineering implementations have some disadvantages in terms of economic application:

In particular, in devices that interfere with the basis weight of an optimally scattered grit mat, whether by rest of more traces of grit or by milling of areas by means of so-called "Scalper" results production interruptions due to stoppages of complex machinery Feeding of a few cm or dm wide traces on a grit mat arise problems for the elaborate

technical solutions must be found. Also difficult is the removal of grit from the outer layers of a grit mat, especially in flat grit for the production of oriented scattered boards (OSB - oriented beach board), as the large-scale

Chips or chips tend to leave inaccurate gaps in their removal from the grit mat.

In this respect, however, only an edge exaggeration of the longitudinal edges of a

Grit mat is to be carried out, are usually in

Production direction respectively provided in the longitudinal extent of the forming belt lateral movable adjustment elements in the spreading head, which ensure that evenly scattered below the scattering rollers Material in the edge areas increasingly in the direction of the longitudinal center line of the spreading material mat is moved. Thus, a uniform basis weight considered over the width of the spreading material mat results that has a continuous increase on the outer longitudinal sides.

Basically, this solution means an advantage in the compression, since thus the necessary measures for a marginal increase of

Grit mat are created and thus even with a bulging of the grit mat in the press in the edge regions a slight increase in the density or over the entire surface of a material plate

uniform density can be obtained.

A form strand, usually corresponds to the endless forming belt with scattering heads arranged above it for "shaping" a grit mat can have a length of up to 50 m

careful transport is well within the range of feasible, suffers but the longitudinal edge of the grit mat by vibration or by others

Pretreatments, such as in steam injection plants, hot-air devices,

Pre-pressing or the like. To make matters worse, that with several scatter heads in a row, minimal deviations of the edge litter quality or of the location can occur, which also worsen the quality of the longitudinal edges of a litter mat.

In summary, it can thus be stated that a grit mat usually has to be trimmed at the longitudinal edges before it can be trimmed by the gripper mat

Form strand can be transferred to the press. Especially at the continuous production in a continuous operation

Double belt press is to be avoided that during the transfer to the steel strips of the press edge pieces of the spreading material mat uncontrollably crumble and fall into the transfer gap or cake on the lower steel strip of the press.

Accordingly, devices for edge trimming a grit mat are usually provided, which trim the grit mat in the form of strand at the longitudinal edges. This has the economic advantage that the resulting grit can be returned to the scattering process immediately without the material having to go through the elaborate pre-production (preparation, drying, gluing). This measure, however, limits, since the back-guided grit is already glued for a long period of time and the binder cures without supply of pressure and heat over time. It should also be the goal to keep the amount of grit returned as low as possible. It is obvious, however, that after the above

Designs just the edge areas of the grit mat, which have to be trimmed the largest weight per unit area by the constant scattering increase.

Furthermore, experience and practice have shown that uncontrollable air turbulences occur in particular in the case of a relatively freely falling stream of material after the metering device, which is an unintentional one Area weight distribution across the width but also over the length cause. In the case of a thin-plate production in particular, unsightly discolorations on the surface (cloud formation) or even density changes with a corresponding notch effect thus appear in the spreading material mat or in the material plate.

Previous solutions from the prior art offer for this purpose so-called chamber chutes, which divide across the width of the material flow into several parts / areas. However, these devices are cumbersome to handle, clog easily and are difficult to clean.

The invention has for its object a method, a system and a grit mat for producing at least one layer of a

Generating a spreading material mat in which a gentle and simple way across the width of the grit mat and variable basis weight can be adjusted and / or the basis weight distribution across the width after dosing by a metering device or a

Guide device against occurring air vortices can be improved. In particular, it should be possible to set a lower weight per unit area than the average surface weight of the spreading material mat at the longitudinal edges of the spreading material mat in order to minimize the amount of material due to the trimming of the spreading material mat. This object is achieved by the invention for the method in that by means of at least one mechanical guide device between the

Metering device and the scattering device at least partially the material to be spread in the material flow substantially transversely to the production direction of the

Moved form band and / or that at least partially the spreading material is stabilized in the flow of material in its movement in the direction of movement.

The solution for a system is that for at least partial displacement of the material to be spread substantially transversely to the production direction of the forming belt in the material flow and / or that at least partially stabilize the material to be spread in the material flow in the direction of movement between the metering device and the scattering device

mechanical guide device is arranged. A grit mat is distinguished, in particular produced according to the

A method according to claim 1 and / or in a system according to claim 16, characterized in that at both longitudinal edges of the grit mat a in

Substantially lower weight per unit area than the metering surface weight DFG and / or the average basis weight across the width of the

Grit mat is arranged. Among other things, it is provided that preferably from the longitudinal edges to the intended

Besäumungsebene the basis weight steadily increases. It is now possible with the teaching and solution according to the invention within a scattering head, the layer of a grit mat or einschichte grit mat from a scattering head with respect to her

To evenly adjust the basis weight distribution in width. This applies in particular to orientable and flat spreading material, in particular in the production of oriented scattered boards (OSB). However, basis weight distributions can be generated, which makes it possible

in particular lightweight panels for furniture manufacture, the

predominantly have a lower basis weight than in areas which are suitable for the arrangement of retaining elements (shelves, drawers,

Door fittings, rear wall brackets, ...) are provided. Also, corresponding edges, which are provided for example for a gluing in the corresponding grain / color of the surface sides, also be provided with a higher basis weight. Conceivable in particular as edge protection or for improved machining

Introduction of an edge groove for edge band. Furthermore, it may be provided that the basis weight referred to the Dosierflächengewicht above the scattering head or on the average scattering surface weight and / or on the Streuflächengewicht without being influenced by the

Refer to Leitvorrichtungen.

It is also possible to sprinkle a grit mat so that the outer longitudinal edges in the scattering, and in the area of the scattering heads a low Have basis weight, especially as the

Average surface weight of the spreading material mat. This is preferably achieved in that, in the falling material flow, parts of the material to be spread on the edge regions, viewed transversely over the forming belt, are displaced during the passage in the spreading head in the direction of the central longitudinal extent of the molding strand or of the spreading material mat. It turns out that viewed from a longitudinal side in the direction of the center of a grit mat only a lower basis weight arises in the grit mat, that detached from a higher basis weight and finally merges into the average surface weight of the grit mat. Will this

Sprueing mat now trimmed, preferably at the set peak of the higher basis weight (peak), obtained in an advantageous manner as small as possible trimmed material but still a grit mat with a desired increase in grammage in the edge regions along.

With regard to the terminology used in the present invention, the following definitions are made:

A possible guiding device preferably does not influence the entire falling material stream or material stream to be introduced into the scattering head, but only a part thereof. This is necessary to avoid extensive gaps in the spreading material mat. Also is not adjusted by the guide device, as usual in a width adjustment, the spread of the grit mat, but only parts of the material stream are preferably moved or diverted to achieve a different basis weight distribution over the width of the grit mat. This can be done with one or more guiding devices. The term

"Dosage area weight" describes the theoretical basis weight of a material flow which arises when a metering device removes scattered material controlled over the width B1 in order to transfer it to a scattering head and deposit it there on a forming belt of the width B. Preferably, B> B1, which is not The material flow has a depth of length L in the production direction / direction of movement of the forming belt The spreading surface weight describes the basis weight of the spreading material mat across the width of the forming belt with a width B. If no changes are made by the spreading head or other devices to the weight of the dosing surface, that corresponds

Dosage area weight the Streuflächengewicht. If the grit mat is trimmed, this is replaced by the trimming a new width B3, where B3 <B2.

As a scattering device in the scattering head, the device for the targeted storage of the material to be spread on the forming belt is designated. This is found

Preferably, directly above the forming belt and has as the last mechanical, in particular moving, machine element contact with the grit before it leaves the scattering head and on the forming belt respectively

Spreading mat comes to rest. In particular, it is now provided that the substantially uniform Dosierflächengewicht DFG of the material flow is changed by the guide into a differentiated Streuflächengewicht SFG, wherein a differentiated Streuflächengewicht SFG is to be understood a contour that may have different shapes, as will be described in more detail below. In this case, the stabilization and / or the displacement of the material to be spread in the material flow in several stages with

successive guide devices is performed. A

Stabilization may be necessary if, in particular flat or orientable grit produced by its movement air turbulence, which can lead to a shift of the material to be spread in the longitudinal or transverse direction of the forming belt.

The stabilization and / or the displacement is preferably carried out before the material flow enters the scattering head and / or before the first contact of the material flow with a moving machine element of the scattering head. The grit should preferably be scattered in a width B2 on the forming belt to a grit mat, which corresponds substantially to the width B1 of the material flow after the metering device.

It is also preferred that by means of the guide device in the

Scatter surface weight SFG over the width B2 at least a first region with a higher basis weight FH than the Dosierflächengewicht DFG and adjacent at least one further area with a lower basis weight FG, in particular as the Dosierflächengewicht DFG, is set. This is especially provided when lightweight panels are to be produced in furniture. For this purpose, in the (differentiated) scatter surface weight SFG over the width B2, a plurality of regions with a higher basis weight FH and intervening regions lower

Basis weight FG are arranged such that the areas with higher basis weight FH can be used in the course after the press as parting line for splitting the compressed material plate and / or as areas for attachment of fasteners or fittings in furniture use.

In an alternative or additional embodiment, at the longitudinal edges of the grit mat a substantially lower

Basis weight FG be set as the Dosierflächengewicht DFG to keep the amount of material accumulating on the Besäumvorrichtung grit low.

Preferably, the spreading material mat is cut between the spreading head and the press by means of a trimming at the longitudinal edges to a width B3 with longitudinal edges, wherein the longitudinal edges can be arranged in areas with a higher basis weight FH than the Dosierflächengewicht DFG. Preferably, at least one baffle arranged between the dosing device and the spreader, preferably movable and / or pivotable by means of at least one adjusting device, is held at least partially in the spreading material falling in the direction of movement as a mechanical guide device. Additionally or alternatively, to avoid of incalculable cross flows the grit is at least partially guided between bunker and scattering head substantially in the direction of fall along a guide flap, wherein the guide flap can also be arranged at an angle to the grit respectively to the material flow adjustable. In special cases, it may make sense that an illustrative curve of the scattered surface weight SFG across the width B2 relative to the

geometric center of the width B2 has a, preferably axis-related, symmetry.

With more elaborate designed scattering heads, it may be useful to abandon the spreading material by means of the guide flap on at least one arranged between the guide flap and the scattering device dissolving device.

For improved and / or automated adjustment of the

Process parameters, especially for different

Production batches, it may be useful, the guide flap and / or at least one baffle, which are arranged over the width of the forming belt and for stabilizing and / or influencing the

Dosing surface weight DFG in your position to move in the direction of fall-spreading and / or to the forming belt and / or to the side walls of the scattering head to adjust by means of adjusting devices. The baffles are particularly preferred in their orientation in the production direction of

Formbandes in the length L of the material flow 24 substantially 10% to 80%, preferably between 30% and 50% introduced. That is pre-voted in a meaningful and practical way blockages in the case area and so-called stray holes in the spreading material mat.

The system is independent on its own and can be used alone with the features described. At the same time, however, the system is also particularly suitable for carrying out the method

Claim 1 suitable.

Further advantageous measures and embodiments of the subject matter of the invention will become apparent from the subclaims and the following

Description with the drawing out.

Show it:

1 shows a plant according to the invention, consisting of one over a

Form band arranged scattering head with associated bunker and arranged therebetween guide for the grit in two schematic and corresponding views,

Figure 2 is a representation of possible basis weights across the width of a

Formbandes in a scattered grit mat respectively based on the basis weight of a metering device of a bunker, 3 shows a section in plan view through the guide device according to FIG. 1 with guide plates parallel to the direction of fall for stabilizing a material flow from spreading material, FIG.

Figure 4 is a plan view of the area of the molding strand between

Scattering station and press with presentation of the different

Widths B, B1, B2, B3 and a trimming device,

5 shows a representation of an adjustable basis weight distribution over the width B3 of a trimmed spreading material mat for pressing in a press, FIG.

FIG. 6 is an illustration of a basis weight distribution to be set based on the scatter surface weight of the scattering material mat to be scattered according to FIG. 3 across the width B2 under a scattering head;

Figure 7 is a representation in side view of the possible setting of

Guide device or the baffles to achieve the

Basis weight distributions over the width B2 according to Figures 5 and 6 at a width B1 of the Dosierflächengewichts DFG and

Figure 8 is a plan view of Figure 7 showing the immersion depth of

Guide device or the baffles in the material flow of a length L in and a width B1 transverse to the production direction,

Figure 9 is an illustration of an expanded arrangement of two in

Direction of movement of the material flow successive guide devices in a more complex configuration, wherein the upper guide for changing the

Basis weight distribution and the lower guide for stabilizing the newly adjusted basis weight distribution is used,

Figure 10 is a representation of a part of a guide device with a

possible arrangement of a baffle with associated

Adjusting device for setting different angles of the guide plate in two corresponding schematic views and

Figure 11 shows a possible adjusting device interconnected

Baffles by means of two movable push rods.

In FIG. 1, an exemplary plant for producing a spreading material mat 7 for pressing in a press 22 is shown on the left side in a schematic view. On the right side there is a side view according to the section line of the left illustration. In the plant grit 9 is registered in a bunker 2 and controlled by means of a back stripping device 25 and underlying, endlessly circulating bunker bottom belt 16 a metering device 15 is supplied. The metering device 15 carries the grit over a width B1 with a uniform Dosierflächengewicht DFG (right representation below). In the direction of movement 12, usually corresponds to the falling direction of the scattering material 9, thus forming a substantially in the direction of the scattering head 1 moving material flow 24 with a width B1 across and a length L in the production direction 11 (corresponds to the direction of movement of the forming belt 8). This happens

Material flow 24 at least one mechanical guide device 5 for

Stabilization of the moving material 9 in the moving material 9 and / or for setting a relation to the existing over the width B1

Dosing weight DFG differing or uneven

It is particularly preferred that the guide device 5 for stabilizing and / or displacement of the scattering material 9 in the material flow 24 substantially after the metering device 15 and before the onset of the grit weight SFG across the width B2 of the grit

Material flow 24 in the scattering head 1 and / or before the first contact of the material flow 24 with a moving machine element (eg.

Opening rollers, sieves or the like.) Of the scattering head 1 is arranged. To set the transfer location of the material flow 24 on or in the scattering head 1, a guide flap 18 with optional mechanical or automatic adjusting devices (not shown) may be arranged. The guide flap 18 is arranged over the entire width of the forming belt 8 and / or the scattering head 1, at least over the width B1 of the scattering material 9 after the metering device 15. As shown in the right-hand drawing of Figure 1, over the width of two baffles 10 "on an optional baffle 18, which by their angular arrangement and their only partial engagement in the length L of the material flow 24 (left) a shift of parts the material to be spread 9 of the material flow 24th effect during the Vorbeifallens or -flowing, so that results from a uniform Dosierflächengewicht DFG (right representation below) an irregular contour of the scattering surface weight SFG within the grit mat 7 on the forming belt 8. Because of that

mechanical guide 5 immersed only partially in the flow of material 24 remains sufficient grit 9 is still available to provide coverage of the forming belt 8, so that no underscoring or "empty spots" may arise in the grit 7.

In the scattering head 1, one or more dissolving devices 4 can be arranged for the grit 9, preferably, these are arranged between the guide flap 18 and the scattering device 14.

With a further guide device 6, which may be the same as the guide device 5, between the opening device 4 and the

Spreader 14, the effect for a lateral adjustment of the basis weight along the longitudinal edges 17 of the grit mat 7 can be further enhanced. Again, the guide 6 is not lateral

To understand adjusting device for the width B2, but only causes the displacement of another part of the grit 9, since the "theoretical depth" L now extends over a longer range and the

Guide 6 takes only a part of it. This is particularly useful for producing a large drop in the scattered surface weight SFG at the longitudinal edges 17 of the spreading material mat 7 for falling below the average surface weight of the spreading material mat 7 across the width B2 and / or the Dosierflächengewichts the metering device 15 across the width B1.

FIG. 2 shows various basis weight distributions over the widths B1, B2 and B3. These are specifically concerned with the

Basis weight distributions at the longitudinal edges 20 and 17 of the

Grit mat 7. In the bottom view, there is a conventional grit mat according to the prior art, which dosed over a width B1 and by means of lateral sliding walls completely (based on the

Material flow) was reduced from a fall width 21 to a width B2 of the spreading material mat. This results in a (steeper) rise of the edge side

Surface weight in the originally scattered grit mat 7 at the longitudinal edges 17. Subsequently, a high proportion of grit 9 is removed due to the trimming by the separated areas with this elevation again when the grit mat is reduced to the width B3. The two upper representations show an edge scattering with a curvy edge behavior, so that a maximum of the edge-side scatter surface weight SFG at the new longitudinal edge 20 preferably results at the separating cut by the trimming device 23. In the upper illustration, the fall width 21 (of the material flow 24) corresponds to the width B2 of the spreading material mat, in the middle representation, a higher hill is achieved at the edge regions for trimming because either the baffles 10, for example, immerse deeper in the material flow and / or on the lateral sliding walls (Not shown) the fall width 21 of the material flow is reduced to a width B1 of the grit mat 7 and thus more material is scattered at the edge regions. For a better comparison that is

Dosing surface weight marked according to B1, if the grit 9 would be unaffected deposited in its basis weight distribution on the forming belt 8.

FIG. 3 shows a section in plan view through the guide device 5 according to FIG. 1 with guide vanes 10 arranged parallel to the direction of fall on a guide flap 18 for stabilizing the material flow 24 of a length L and a width B1 of spreading material 9 during the passage from the bunker 2 into the scattering head 1 This has the background that a stabilization of the falling grit is quite advantageous. Further forms between the only partially in the material flow 24 reaching baffles 10 no risk of clogging as it is the case from the prior art with variable or more over the width arranged closed slide down slides / -.

The arrangement of several baffles in a kind of waiting position can be positive insofar as there are different solutions to adjust the spread. If, for example, the spreading width is reduced from 3 m to 2.5 or 2 m, said baffles 10 could not be moved inwards far enough to nevertheless carry out the method. For this reason, it is advantageous several baffles across the width to be arranged in order to be as variable as possible in the width setting. Incidentally, quite a conventional width adjustment, so lateral baffles over the entire length of the scattering head can be realized. In this case, more material could be displaced in the direction of the middle of the width of the forming belt advantageously with a plurality of baffles, so that the desired profile nevertheless forms.

FIG. 4 shows a plan view of the region of the molding strand between the scattering head 1 and the press 22, showing the different widths, such as the width B of the forming strip 8, the width B1 of the strip

Dosierflächengewichts DFG respectively of the material flow 24, the width B2 of the grit mat 7 and the scattering surface weight SFG, and the width B3 ready for pressing and trimmed grit mat 7 in the production direction 11 after a Besäumvorrichtung 23rd

FIGS. 5 to 8 show a coherent depiction of a possible production method of a spreading material mat 7 with exemplary parameters. The representation is to be worked out in order of the figures opposite to the material flow of the production, since FIG. 5 the spreading material mat 7 already suitable for pressing and trimmed with the

Longitudinal edges 20 and a width B3, Figure 6 represent the unedged grit mat and Figures 7 and 8, the displacement of the falling material to be spread by means of the guide 5. The grit mat 7 has over the uniform metering surface weight on a non-uniform contour of the scattering surface weight SFG over the width B3, with places higher basis weight FH alternate with areas of lower basis weight FG. The number of baffles used for a higher and / or lower weight per unit area FG can also amount to more than one, as illustrated in particular by FIGS. 7 and 8. At the longitudinal edges is the desired for compression surface weight increase of

Scattering weight SFG.

FIG. 6 shows the spreading material mat in the original width B2 after and during the scattering with the longitudinal edges 17.

Corresponding to this, FIG. 7 shows the adjustment of the guide device 5 necessary for influencing the metering surface weight DFG over the width B1 for producing a surface area SFG over the width B2. For this purpose, the baffles 10 are at an angle to the direction of movement 12 of the material flow 24 from grit. 9

Finally, FIG. 8 shows that the baffles 10 project only partially into the material flow 24 of a depth or length L and provide for a partial displacement of the material to be spread 9 of the material flow 24 over the width B 1.

FIG. 9 shows, for a more complex method application or for fine adjustment, a multiple arrangement of the guide device, consisting of a guide device 5 and in the direction of movement 12 of the guide device

Material flow downstream guide 5 '. The first Guide 5 is used to move the grit 9 across the width B1, the second guide 5 'for stabilization and the

subsequent homogenization of moving in the direction of movement 12 material flow 24 is arranged. The guide device 5 'thus leads to a fine adjustment of the displacement of the scattering material 9 by the guide device 5' prevents a "wide" emigration / displacement of the grit 9. In Figure 10 is a representation of a part of a guide device 5 with a possible arrangement of a baffle 10 with associated adjusting device 19 for setting different angles of the guide plate 10 in two corresponding schematic views.The baffle 10 can be changed by means of the adjusting devices 19 at a distance from the guide flap 18 and displaced by the opening 27 and accordingly changes the penetration depth into the material flow 24. Um angular adjustments of the guide plate 10 to adjust the material flow 24, the baffles 10 grooves 26 into which the guide flap 18 passes when the baffle 10 about the axis of rotation 28 by means of

Actuator 19 is rotated.

FIG. 11 shows a possible adjusting device 19 for baffles 10 connected to one another by means of push rods 29. The baffles 10 are connected alternately to different push rods 29, so that when a push rod 29 moves, every second baffle 10 is moved in the direction of the push rod 29. These are of course only exemplary arrangements for a variety of possible adjusting devices for the baffles 10. Within the scope of the invention, further possibilities are conceivable. In particular, it is conceivable that the baffles 10 not only form a vertical angle to a wall or to the guide flap 18, but also for this purpose, preferably have separately adjustable angle. It is further preferred that the openings 27 have means for sealing, so that unnecessary dust or grit can escape from the fall area. With regard to the spreading material mat 7, it should be noted in summary that preferably at both longitudinal edges 17 of the spreading material mat 7, a substantially lower basis weight FG should be arranged than the metering surface weight DFG. Preferably longitudinal edges 20 are arranged on the spreading material mat 7 with longitudinal edges 17 by means of a trimming device 23, wherein the longitudinal edges 20 have a higher basis weight FH than the dosing surface weight DFG and / or the scattering surface weight SFG and / or than the average basis weight of the spreading material mat 7. Preferably, the preparation of the grit mat 7 is carried out in a claimed system and / or by the preparation of the grit mat according to the method. 1400 Reference List 1400:

Spreading head 20. Longitudinal edges on B3 bunker 21. Case width housing of 1 22. Press opening device 23. Trimming device guide device 1 24. Material flow (discharge area) 25. Backing device guide device 2 (scattering area) 26. Slots in 10 spreading material mat 27. Breakthrough in 18 forming belt 28. Rotary axis Grit 29. Push rod. baffle

, production direction

DFG dosing weight. movement direction

SFG scattered area weight

, B Wide Formband 8

B1 wide spreading material after 15. spreading device

B2 Wide spreading material mat

, metering

B3 Wide spreading material mat after 23. Bunker bottom strip L Length spreading material in 11. Long edges at B2

FH grammage high

, deflector

FG basis weight low. locking device

Claims

claims

1. A method for producing a spreading material mat (7) from at least one layer of spreading material (9) on an endlessly circulating forming belt (8) by means of at least one scattering head (1) in the course of pressing the spreading material mat (7) in a press (22) a material plate, wherein the grit (9) mounted in a bunker (2) and metered by a metering device (15) and with a substantially uniform Dosierflächengewicht (DFG) over a width (B1) across and with a length (L) in the production direction (11) of the forming belt (8) as a stream of material (24) discharged and then in

Essentially in the direction of movement (12) introduced into the scattering head (1) and with at least one scattering device (14) oriented and / or unoriented across a width (B2) on the forming belt (8) is scattered, d a d u c h e c e n e c e n e,

in that at least part of the grit (9) in the material flow (24) in the at least one mechanical guide device (5) between the metering device (15) and the scattering device (14)

Moved substantially transversely to the production direction (11) of the forming belt (8) and / or that at least partially the spreading material (9) in the material flow (24) in its movement in the direction of movement (12) is stabilized.

2. The method according to claim 1, characterized in that by the guide device (5), the substantially uniform Dosierflächengewicht (DFG) of the material flow (24) in a

differentiated scattered surface weight (SFG) is changed.

3. The method according to claim 1 or 2, characterized in that the stabilization and / or the displacement of

Scrap material (9) in the material flow (24) in several stages with in

Movement direction (11) of the material to be spread (9) successive guide devices (5, 5 ') is performed.

4. The method according to one or more of the preceding claims, characterized in that the stabilization and / or the displacement before the occurrence of the material flow (24) in the

Spreading head (1) and / or before the first contact of the material flow (24) with a moving machine element of the scattering head (1) is performed.

5. The method according to one or more of the preceding claims, characterized in that the grit (9) in a width (B2) on the forming belt (8) is scattered to a grit mat, which is substantially the width (B1) of the material flow (24 ) corresponds to the metering device (15). Method according to one or more of the preceding claims, characterized in that by means of the guide device (5) in the Streuflächengewicht (SFG) over the width (B2) at least a first region with a higher basis weight (FH) than the Dosierflächengewicht (DFG) and adjacent at least one further area with a lower basis weight (FG), in particular as the Dosierflächengewicht (DFG), is set.

Method according to one or more of the preceding claims, characterized in that as mechanical

Guide device (5) at least one between the metering device (15) and the scattering device (14) arranged, preferably by means of at least one adjusting device (19) moving and / or

pivotable, baffle (10) at least partially in the in

Movement direction (12) falling grit (9) is held.

Method according to one or more of the preceding claims, characterized in that, in particular for

Avoidance of incalculable cross flows, the grit (9) at least partially between bunker (2) and scattering head (1) in

Essentially in the direction of fall (12) along a guide flap (18) is guided.

9. The method according to one or more of the preceding claims, characterized in that in the scattering surface weight (SFG) over the width (B2) a plurality of areas with a higher basis weight (FH) and lower lying areas lower

Basis weight (FG) are arranged such that the areas of higher basis weight (FH) in the further course after the press (22) as a parting plane for splitting the compressed material plate and / or as areas for attachment of fasteners or fittings used in furniture can.

10. The method according to one or more of the preceding claims, characterized in that at the longitudinal edges (17) of the scattered grit mat (7) a substantially lower basis weight (FG) than the Dosierflächengewicht (DFG) is set.

11. The method according to one or more of the preceding claims, characterized in that the spreading material mat (7) between the scattering head (1) and the press (22) by means of a Besäumvorrichtung (23) on the longitudinal edges (17) to a width (B3) with longitudinal edges (20), the new longitudinal edges (20) being in areas with a higher basis weight (FH) than the metering area weight (DFG) and / or as the basis weight (SFG) of the longitudinal edges (17) and / or as the average

Surface weight of the grit mat (7) are arranged.

Method according to one or more of the preceding claims, characterized in that a representative curve of the scattering surface weight (SFG) over the width (B2) with respect to the geometric center of the width (B2) one, preferably

Has axis-related, symmetry. 13. The method according to one or more of the preceding claims, characterized in that the grit (9) by means of the guide flap (18) on at least one between the guide flap (18) and the scattering device (14) arranged dissolving device (4) is abandoned.

14. The method according to one or more of the preceding claims, characterized in that the guide flap (18) and / or at least one baffle (10) over the width of the forming belt (8) are arranged and for stabilizing and / or influencing the Dosierflächengewichts (DFG ) are adjusted in their position to in the direction of fall (12) moving grit (9) and / or the forming belt (8) and / or to the side walls (3) of the scattering head (1) by means of adjusting devices (19).

15. The method according to one or more of the preceding claims, characterized in that the guide device (5) or baffles (10) in an orientation in the production direction (11) of the forming belt (8) in the direction of the length (L) of the

Material flow (24) substantially 10% to 80%, preferably between 30% and 50%, in the material flow (24) penetrate.

16. System for producing a spreading material mat (7) from at least one layer of spreading material (9) on an endlessly circulating forming belt (8) by means of at least one scattering head (1) in the course of pressing the spreading material mat (7) in a press (22) a material plate, wherein in the system at least one bunker (2) for storing the material to be spread is arranged, wherein for the discharge, for dosing a uniform Dosierflächengewichts (DFG) and for entry of the material to be spread (9) as a material flow (24) over a width ( B1) transversely and with a length (L) in the production direction (11) of the forming belt (8) a metering device (15) on the output side of the bunker (2) is arranged, and in the scattering head (1) for oriented and / or unoriented scattering of the material to be spread over a width (B2) of the forming belt (8) at least one scattering device (14) is arranged, characterized

characterized in that for the at least partial displacement of the spreading material (9) substantially transversely to the production direction (11) of the forming belt (8) in the material flow (24) and / or for the at least partial stabilization of the spreading material (9) in the

Material flow (24) in the direction of movement (12)

between the metering device (15) of the bunker (2) and the

Scattering device (14) of the scattering head (1) at least one

mechanical guide device (5) is arranged.

17. Plant according to claim 16, characterized in that the guide device (5) for stabilizing and / or displacement of the scattering material (9) in the material flow (24) substantially after the metering device (15) and before the material flow (24) in the Scattering head (1) and / or before the first contact of the material flow (24) with a moving machine element of the scattering head (1) is arranged.

18. Plant according to one or more of the preceding claims 16 to 18, characterized in that as a mechanical guide device (5) at least one between the metering device (15) and the scattering device (14) arranged, by means of at least one adjusting device (19) moving and / or pivotable baffle (10) at least partially in the movement direction (12) moving spreading material (9) respectively in the material flow (24) is arranged. Installation according to one or more of the preceding claims 16 to 18, characterized in that for guiding the material to be spread (9) between bunker (2) and spreading head (1) substantially in the direction of fall (12) at least partially a guide flap (18) at least over the Width (B1) is arranged.

Installation according to one or more of the preceding claims 16 to 19, characterized in that between the guide flap (18) and the scattering device (14) at least one

Opening device (4) for the grit (9) is arranged.

Installation according to one or more of the preceding claims 16 to 20, characterized in that the guide flap (18) and / or at least one guide plates (10) over the width of the

Form belt (8) are arranged and arranged in position to the direction of fall (12) moving material (9) and / or the forming belt (8) and / or to the side walls (3) of the scattering head (1) by means of adjusting devices (19) arranged adjustable are. 22. Plant according to one or more of the preceding claims 16 to 21, characterized by the use of the system for carrying out the method.

23. grit mat for pressing in a press (22) in the course of the production of material plates, characterized in that at least one longitudinal edge (17) of the grit mat (7) has a substantially lower basis weight (FG) than that

Dosing surface weight (DFG) and / or average

Basis weight over the width of the grit mat (7) is arranged.

24. Grit mat according to claim 23, characterized in that at the spreading material mat (7) with longitudinal edges (17) by means of a Besäumvorrichtung (23) longitudinal edges (20) are arranged, wherein the longitudinal edges (20) has a higher basis weight (FH) than the Dosierflächengewicht (DFG) and / or the scattering surface weight (SFG) and / or as the average basis weight of the spreading material mat (7).

25 grit mat according to claims 23 or 24, marked t d u r c h the preparation of the grit mat in a system according to one or more of claims 16 to 22 and / or by the preparation of the grit mat according to the method of one or more of claims 1 to 15.