WO2017207448A1

WO2017207448A1 - Installation and method for producing a material board

Info

Publication number: WO2017207448A1
Application number: PCT/EP2017/062814
Authority: WO
Inventors: Gernot Von Haas
Original assignee: Dieffenbacher GmbH Maschinen- und Anlagenbau
Priority date: 2016-05-31
Filing date: 2017-05-27
Publication date: 2017-12-07
Also published as: CN107443536A; DE102016110070A1; CN107443536B; CN207480834U

Abstract

Installation and method for producing a material board, preferably scattered in an at least partially oriented manner, comprising for the processing of cellulose-containing material (M) at least one comminuting line (Z1, Z2), a drying device (T), a screening device (S) for dividing the dried material (Mt) into at least two fractions (F1, F2) and a scattering installation (1) with at least one scattering head (2) for the at least partially oriented scattering of the fractions (F1, F2) to form a scattered particle mat (4) on a continuously circulating forming belt (3), and a press (5) for pressing the scattered particle mat (4) to form a material board (6). The installation according to the invention substantially comprises that a first and a second, different comminuting line (Z1, Z2) is arranged for the proportionate preparation of the material (M) present and that a device (25) for setting a predetermined ratio (%) of the amounts of material from the comminuting lines (Z1, Z2) is arranged upstream of the drying device (T). (1517)

Description

Plant and method for producing a material plate

The present invention relates to a system for producing a material plate according to the preamble of claim 1.

Moreover, the present invention also relates to a method for producing a material plate according to the preamble of claim 12.

In the production of material plates from dispersible materials is a

Mixture of particles or fibrous matter 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. The compression can be carried out continuously or discontinuously by means of pressure and / or heat. In the usual material plates, which are produced here, it is usually MDF boards, consisting of medium-density fibers to chipboard from relatively small chips or OSB plates from oriented scattered coarse chips or better expressed coarse or large-scale chips. Scattering occurs in one or more plies as needed, with the need for multiple plies typically occurring with thicker sheets or with multilayer sheets. But even in the production of thin plates, different layers may be desired, especially if specially differentiated requirements exist between the middle layer and the outer layers.

A distinction is made between two scattering possibilities in the scattering stations; the direct scattering after the spreading material bunker, whereby by means of baffles the spreading material is led directly on a forming belt or the indirect spreading over so-called

Spreading roller systems. In the case of indirect scattering, the spreading material discharged from the spreading hopper falls onto so-called spreading rolls, which divide the spreading material and, if necessary, also sort it. The scattering arrangements used in this case are already sufficiently described in their diversity in the patent literature, wherein either a central task of the material to be spread is performed on the scattering rollers or the spreading material is abandoned at one end of the scattering rollers. In this case, a portion of the chips is transported further while another part falls through the spreader rolls through as long as on the forming belt until only unsuitable litter material remains and must be removed from the manufacturing process. Both principles have proven themselves in production and are used successfully. Corresponding disclosures can be found in: DE 10 2007 049 947 A1, DE 102 06 595 A1 and EP 2 598 298 B1.

Any scattering of grit, here shavings or chips, with a certain fine fraction of the grit, brings problems in production highly accurate

Basis weight distributions with it. Especially with a high throughput of grit and with an oriented scattering arise stray or other basis weight inaccuracies in a scattered grit mat, which worsen the subsequent quality of the material plate.

There are from the prior art different Streukopfvarianten for

Spreaders known. In a Spanstreuung for chipboard, the grit is sorted by size and / or density by means of a separating device, usually a roller scattering head or a wind sifter, and stored successively on a forming belt. As a rule, the fine grit is first deposited on the forming belt, then the coarser grit is scattered over the fine material. This gives a grit mat containing a fine topcoat and a second coarser layer. Depending on the method or scattering machine arrangement and execution, a coarse layer and / or a fine layer are sprinkled again. This results in a middle layer of similar coarse grit and two layers of fine grit. In contrast, systems for the production of oriented chipboard (OSB) work normally exactly opposite, because here the long chips are preferably laid longitudinally oriented on the forming belt as a cover layer and the shorter and broken chips are scattered in the middle layer oriented transversely. EP 2 598 298 B1 has disclosed a corresponding device and a method in which coarse chips are first split in a combination scraping head after they have entered and are supplied with different types of litter after their classification. It is provided that the coarse material of the outer layer is supplied and the finer material of the middle / inner layer. This application has proven itself in principle, but still offers room for improvement.

The OSB or chipboard produced by this prior art is popular because of its external appearance because it is an arbitrary surface pattern with a restlessness, for example, as partitions or screens for construction sites like to apply. Also, these are often used in storage rooms or similar structures because of their rigidity as wall formwork.

However, chipboard can also be used as a substitute for expensive veneer or

Serve plywood panels. In particular, in the meantime, it has also been desired that these coarse particle boards should be capable of being coated in order to be known

Refining laminating processes.

Plant operators producing material plates have to offer a large number of manufacturable products in order to be competitive in international comparison. In this case, in addition to the material selection, mixing and processing also a necessary variance in the manufacturing process and in particular a high degree of flexibility in the layer structure of a grit mat is necessary from the

then a material plate is pressed.

On this basis, the present invention has the object to provide a comparison with the prior art improved and much more flexible system and a corresponding manufacturing method. Also, an improved, and in particular coatable material plate is to be created from coarse chips.

The invention is based on a plant for producing an at least partially oriented scattered material plate, which for the processing of

cellulosic material at least one crushing line, a

Drying device, a screening device for dividing the dried material into at least two fractions and a scattering system with at least one scattering head for at least partially oriented scattering of the fractions to a grit on an endlessly circulating forming belt and a press for pressing the

Grit mat comprises a material plate.

The solution of the problem is that for the proportionate preparation of the present material, a first and a second different crushing line is arranged and that a device for setting a predetermined Ratio of material quantities from the crushing lines before

Drying device is arranged.

At least one may preferably be present in the first comminution line

Drum chipper and a subsequent Messerringzerspaner be arranged with a fixed axis of rotation.

Preferably, at least one Messeringzerspaner be arranged with a displaceable axis in the second crushing line, wherein preferably the knife ring is rotated past fixed beams or round wood for the production of coarse chips.

Alternatively or cumulatively, the screening device is suitable for dividing the dried material into two fractions based on their length and / or width.

Alternatively or cumulatively, a bunker for storing the coarser fraction with the scattering head for scattering a middle layer of the spreading material mat and the bunker for supporting the finer fraction with the scattering head of the outer layers is operatively connected.

Alternatively, a bunker for storing the coarser fraction with the scattering head for scattering the outer layers of the spreading material mat and the bunker for supporting the finer fraction with the scattering head of the middle layer can be arranged operatively connected.

In particular, it is provided in the appendix that between these two

can be selectively switched to previous operating modes

to be able to produce different layer structures of the spreading material mat in a plant.

Particularly preferably, it can be provided that classifying scattering heads are arranged for classified scattering of the first and second fractions. Alternatively or cumulatively, it can be provided that the screening device for the dry material is suitable for depositing a third fraction, preferably a smaller particle size than that of the first or second fraction, and this is preferably operatively connected to a further comminution line, preferably an impact mill.

Alternatively or cumulatively, it can be provided that the bunker of the third fraction is operatively connected to the spreading head for producing a covering layer of the spreading material mat.

Alternatively or cumulatively, provision can be made for separating a fourth fraction, preferably the very fine particles, from the dried material and / or from the third fraction into a sieve, in particular before and after the comminution line, particularly preferably a bunker of the fourth fraction is operatively connected to a thermal recovery.

Particularly preferably, a control device is arranged in the system in operative connection with the device for adjusting the ratio of the material to be transferred to the drying device from the comminution lines.

A method for producing an at least partially oriented scattered

Material plate from which the invention proceeds, operates according to the following process steps, wherein cellulosic material in at least one

Crushed crushed, dried in a drying apparatus to dry material, then divided into at least two fractions by means of a sieve and at least one of the fractions are placed in a scattering system by means of at least one scattering head on an endlessly circulating forming belt to a grit mat and finally the grit mat in a Press is pressed to a material plate.

The solution to the problem for the method consists essentially in that the present material proportionally in a first and second crushing line

is processed differently and that the material from these at least two crushing lines in a predetermined ratio to each other

Drying device is supplied for drying. In this case, the material is preferably pre-comminuted in a first comminution line with at least one drum chipper machine and a subsequent one

Knife ring chipper with fixed rotation axis for further shredding.

In addition, the material in a second crushing line is particularly preferably made with at least one Messerringzerspaner with a displaceable axis, wherein the blade ring is rotated past fixed beams or round wood for the production of coarse chips.

Alternatively or cumulatively, the material is pre-sorted on the basis of its properties and supplied in a differentiated manner to the comminution lines.

Alternatively or cumulatively, the dried material is divided into two fractions by length and / or width.

Alternatively or cumulatively, the coarser fraction is used to scatter a middle layer of the spreading material mat and the finer fraction to scatter the outer layers.

Alternatively or cumulatively, the finer fraction is used for scattering a middle layer of the spreading material mat and the coarser fraction is used for scattering the outer layers.

Alternatively or cumulatively, the fractions are scattered in at least one scattering head classified.

Alternatively or cumulatively, a third fraction of fine material is deposited from the dried material, wherein preferably the fraction of the third fraction in

Depending on the required throughput of fine material is set.

Alternatively or cumulatively, the third fraction is fed to a further comminution line, preferably an impact mill. Alternatively or cumulatively, the third fraction is used for the production of cover layers of the spreading material mat, the cover layers usually having the finer material than the first two fractions.

Alternatively or in cumulative fines as the fourth fraction, preferably dust, from the fractions or the dried material, in particular from the third fraction before and after the crushing line, separated by means of a sieve and fed to a thermal utilization. This is especially done when not enough or no material for producing a grit mat in

Area of the third fraction is needed.

Preferably, by means of a control device, a device for adjusting the mixing ratio of the material to be transferred to the drying device is controlled from the comminution lines, preferably as a function of predetermined parameters or tables, most preferably including measured values from parts of the system used to transmit the measured values with the Control device are operatively connected.

Advantageous embodiments and developments, which can be used individually or in combination with each other, are the subject of the dependent claims.

It is according to the invention is not mandatory that different

Crushing processes with technologically distinctly different

Crushing devices must be performed. It would be sufficient within the meaning of the invention, if a crushing line, for example, with a Messerringzerspaner a knife width of 500 mm comminutes the material and in the second crushing a Messerringzerspaner with an alternative

Blade width, for example 750 mm, 1,000 mm or 250 mm. Decisive in the context of the invention would be that after the crushing lines two material streams with significantly different particle size distributions are present, which are then mixed before entering the dryer according to the requirements of production in the system. A change in the ratio is particularly necessary if one or more of the bunker no longer have enough material or a production is converted. Particularly preferably, the system has a control device, in particular digitally controlled, which, according to the specifications of the operating personnel

Material run in the plant controls and thereby, according to the

Production conditions, the amount of material in the bunkers over the

Mixing ratio of the crushing lines controls. In this case, for example, the wear in the crushing lines can be counteracted accordingly, for example, if the proportion of the first fraction of coarse chips due to deteriorating cutting performance is lower or over a certain period of time only poor material has been used, which is not enough yield for the first fraction offers. In this sense, it is particularly preferred that the control device feedback from the bunkers, the crushing lines, the dryer, the screening devices, the scattering device, or the molding strand

(Form belt with spreading material mat) and the press receives and vice versa can adapt these system components to the changed conditions.

The following tables give typical parameters for orientable spreading material in the OSB production for very fine (FK), fine (GK, KS, LS) and / or coarse fractions (KB, LB), whose exemplified ratio (5: 75: 20) may vary depending on the grit but also different. In particular, the transition from FK to GK is fluid and dependent on the set or used screening devices.

Fines

FK Feinstspäne (fine grain)

Length <4 mm

Width <2 mm

Thickness <1 mm

fines

GK chips

Length> 5 mm

<35 mm

Width <5 mm

Thickness <1, 5 mm

KS short-narrow-coarse chip

Length> 35 mm

<100 mm

Width <15 mm

Thickness <1, 5 mm LS long-narrow-coarse chip

Length> 100 mm

<250 mm

Width <15 mm

Thickness <1, 5 mm

coarse fraction

KB short to broad coarse chip

Length> 100 mm

<250 mm

Width <15 mm

Thickness <1, 5 mm

LB long-broad-coarse chip

Length> 100 mm

<250 mm

Width <15 mm

Thickness <1, 5 mm

Further advantages of the invention will be described below with reference to embodiments and in conjunction with the drawings.

In it show schematically:

Fig. 1 shows a system according to a first embodiment for producing a

Material plate starting from the storage of the starting material to the press,

2 shows the exemplary scattering system of Figure 1 on a larger scale,

3 is a representation of an exemplary material flow of the

Shredding lines up to the creation of a spreading material mat,

Fig. 4 shows a first embodiment of a multilayer material plate

respectively spreading material mat,

Fig. 5 shows a second embodiment of a multilayer material plate and Fig. 6 shows a third embodiment of a multilayer material plate with a top layer of fines.

In the following description of the preferred embodiments of the present invention, like reference characters designate like or similar components.

In Figure 1, the manufacturing process and the material flow from the storage bin of the material M up to the pressed in a press 5 grit mat 4 and cut in appropriate lengths material is schematically shown plate 6. It should be noted that the proposed process is shortened and not shown in all actual necessary details. Nevertheless, based on the scheme, the invention can be sufficiently and understandably explained.

The material M is supplied to a processing after removal from the storage area, which essentially comprises the crushing and, if necessary, cleaning. Under certain circumstances, the material is presorted or already stored according to the use for the comminution lines Z1 or Z2. In this embodiment, the material M is either in a first crushing line Z1 by means of a

Pre-shredded drum chopper 8 and then comminuted in a knife ring chipper 9 to a predetermined particle size distribution. Here, in this crushing line Z1 of the knife ring 10 has a fixed axis 13 to which the blade ring 10 and / or the corresponding counter blade rotates.

In the second crushing line 7 a so-called Langstamm-Zerspaner (Engl .: Longlog Flaker) is arranged. The main difference to the above

Messerringzerspaner 9 consists in the sliding axis 12 of the knife ring 1 1 with respect to the clamped material and to be machined M. The particular advantage is that long and wide coarse chips can be produced with this long-stem shredder, suitable for high-quality production of coarse chipboard (OSB ) are suitable.

After the crushing lines Z1, Z2, the crushed material M becomes one

Device 25 for setting the predetermined ratio between the Material quantities transferred from the two crushing Z1, Z2, and passed from there in the appropriate ratio% of a dryer 14 a drying device T. The device 25 may for example also consist of two separately adjustable in their flow rates and / or flow rates conveying devices that connect the crushing Z1, Z2 with the dryer 14. Alternatively, it may also be useful one or more bunkers (not shown but the

Assigned crusher lines) between the crushing lines Z1, Z2, Zn and the drying device T provide, from which the material can be removed in the predetermined ratio%.

After the drying device T, the dried material Mt enters a

Screening device S, which is suitable for the dry material Mt in different

Split fractions. By way of example, in the present exemplary embodiment, this is preferably divided into four fractions F1, F2, F3, F4. The four fractions are now transferred into a bunker 21 for the fraction F1, into a bunker 22 for the fraction F2, into a bunker 23 for the fraction F3 and, if necessary, depending on the equipment of the screening device S for a fourth fraction in a bunker 24 , These bunkers 21, 22, 23, 24 can be designed as so-called dosing bunkers and have dosing devices (not shown) for the metered discharge.

The fraction F1 is preferably coarse material, the fraction F3 is preferably fine material and the fraction F2 is according to the embodiment, the material having a particle size distribution which is arranged between the fractions F1 and F3. In a preferred embodiment, for producing a

Coarse chipboard / material board 6 with oriented layers and outer layers are the fractions F1 and F2 orientable material, which is suitable for transverse and / or longitudinally oriented scattering.

In a production of a three-layer coarse chipboard, the fractions F1 and F2 would already be sufficient to produce them, the fractions F1 and F2 are fed according to the specifications of a scattering system 1 such that a grit mat 4 can be made on a forming belt 3, which orientates at least one has scattered layer. It would be in the present

Process Schemes the three middle scattering heads 2 used for the fractions. The Thus produced grit mat 4 can then in a press 5 to a

Material plate 6 are pressed. For a possible layer structure of a grit mat, reference is made in detail to the description of the figures for FIG.

If sufficiently suitable material for the fraction F3 (bunker 23) is already obtained from the screening device S, this can be used directly for the production of a fine covering layer along the dashed arrow. Usually, however, the

Fraction F3 again a post-crushing, here a crushing line Z3, subjected and nachzerkleinert using an impact mill 18. In this case, the fraction F3 can be fed directly to the bunker 23 after the size reduction line Z3 or is sieved again in a sieve 19 and a further fraction F4 is deposited. The fraction F4 is preferably dust or other fines, which is preferably for thermal utilization V by means of a dust or

Granule burner is suitable and can be stored in a bunker 24 for this purpose. Incidentally, even in the screening device S after the dryer 14 already fines can be deposited, if this is necessary or desired.

According to the invention, the ratio% between the comminution lines Z1 and Z2 is set according to the requirements of the production or preferably controlled by means of a control device 20. This control device 20 is preferred with

Level sensors (not shown) of bunkers 21, 22, 23, 24 operatively connected and will supply according to the requirements, the crushing lines Z1 and Z2 with material M and split the crushed material in the device 25 according to the required ratio%. The corresponding connection arrows are intended to represent the active connections with the individual system parts and are not exhaustive. Most preferably, the control device 20 should be in a digitized form on tables or recipes for the production of

Material plates can fall back and according to these tables the

Be able to control production parameters of the plant.

In Figure 2, the scattering system 1 is shown in an enlarged scale. The five

Scattering heads 2 can be used to create a five-layer grit mat 4 in a consecutive application. Alternatively, also under

Shutdown of various scattering heads 2 different layer structures can be achieved. In the scattering heads, from left to right, a roll scattering device, a longitudinal orientation device, a transverse orientation device, a

Longitudinal orientation and again a roller scattering device arranged by way of example.

If, for example, the odd scattering heads 2 are not operated, then only a single-layer longitudinally oriented scattering material mat 4 is created, preferably from the fraction F1 and / or F2. This can be provided in operation of the two outer scattering heads 2 with a cover layer 17, which is preferably formed from the material of the fraction F3.

In an alternative application, all three orienting spreading heads 2 (second, third and fourth spreading heads) may be used and a three-layer oriented spreading material mat formed with a middle layer 15 of transversely oriented material and two outer layers 16 of longitudinally oriented material. Depending on the supply of fractions F1 or F2 to the scattering heads 2 is now a classic

Chipboard (OSB) produced, the outside of the fraction F1 with the larger

Coarse chips and inside the fraction F2 with the smaller coarse chips.

Alternatively, when switching the fractions a coatable

Coarse particle board can be created, in which the coarser fraction F1 in the middle layer 15 and the finer fraction F2 is arranged in the outer layers 16.

Now all scattering heads 2 as shown with material of

Supplies fractions F1, F2 and F3, a so-called fine OSB plate is produced, which is arranged on the outer oriented layers 16 as a cover layer 17 even the finest material of the fraction F3. Such a manufactured

Material plate 6 would have a coatable surface.

In a very particularly preferred embodiment, at least parts of the fractions F1, F2, or F3 are scattered in the scattering heads 2 classified by suitable devices.

3 shows an alternative plant and method for producing a material plate 6. Here, after the sieve device S, the fractions F1 to F3 are formed such that the coarse fraction with the broad coarse chips in the fraction F1 and the fine fraction is deposited with the narrow coarse chips in the fraction F2. The fine fraction FK is assigned as fine grain fraction F3 and comminuted in an impact mill 18 and then used in the scattering heads for the production of the top layer. Preferably, the cover layer is classified scattered, so that the fines FK outside (based on an imaginary center line of the structure of the grit) is angeordet and according to a particle size distribution of a fraction the

Coarse grain GK is placed towards the middle layer. Subsequently, the narrow fraction F2 is also classified classified on the first cover layer, with the short narrow coarse chips KS are first deposited and then the long coarse chips LS. For the middle layer, the broad coarse chips from the coarse fraction of fraction F1 are preferably deposited so that outside the short broad coarse chips KB and inside the long wide coarse chips LB are deposited. The long wide coarse chips LB thus form the part of the middle layer which corresponds to an imaginary center line of the spreading material mat 4. Accordingly, the fourth and fifth

Scatter 2 used in mirror image to ensure a uniform layer structure.

Fig. 4 shows a three-layer material plate 6 of a compressed three-layer grit / material plate with two outer longitudinally oriented and classified (shortly after long) outer layers mainly from narrow

Coarse shavings KS, LS and a middle cross-oriented layer mainly from broad wood chips KB, LB, again classified from short to long.

Fig. 5 shows a three-layer, trained as OSB material plate / grit mat with two outer longitudinally oriented and classified outer layers mainly from broad coarse chips KB, LB and a middle transverse oriented mainly from narrow coarse chips KS, LS. Again, one should

classified arrangement can be shown in the individual layers.

Finally, FIG. 6 shows a five-layered five-layer material plate / spreading material mat formed as a surface-refined fine OSB with two outer unoriented cover layers made of fine chips FK and chips GK, which are preferably classified. Among them are two longitudinal as well as classified ones Layers predominantly made of narrow coarse chips KS, LS and a middle cross-oriented layer consisting mainly of broad wood chips KB, LB. Here, too, in the classified areas, the narrow coarse chips are classified after short KS and long LS coarse chips respectively the broad coarse chips are classified after short KB and long LK coarse chips.

List of numbers P1517:

1 scattering plant

2 scattered head

3 form band

4 spreading material mat

5 press

6 material plate

7 Knife chipper

8 drum hackers

9 knife ring chipper

10 knife ring (of 9)

1 1 knife ring (from 7)

12 axis (movable from

13 axis (fixed)

14 dryers

15 middle class (out of 4)

16 shift (out of 4)

17 topcoat (out of 4)

18 impact mill

19 sieve

20 control device

21 bunkers (F1)

22 bunkers (F2)

23 bunkers (F3)

24 bunkers (F4)

25 device

% Relationship

M material

Mt material (dry)

P production direction

S screening device T drying device

V recovery (thermal)

Z1 shredding line

Z2 shredding line

Z3 shredding line

F1 faction

F2 fraction

F3 fraction

F4 fraction (ultrafine fraction)

Claims

Patent claims

Plant for producing a material plate, preferably at least partially oriented, comprising at least one shredding line (Z1, Z2) for processing cellulose-containing material (M),

a drying device (T),

a sieving device (S) for dividing the dried material (Mt) into at least two fractions (F1, F2) and

a spreading system (1) with at least one spreading head

(2) for at least partially oriented scattering of the fractions (F1, F2) to form a grit mat (4) on an endlessly rotating forming belt

(3), and

a press (5) for pressing the grit mat

(4) to a material plate (6), characterized in that

for the proportional processing of the present material (M), a first and a second different shredding line (Z1, Z2) is arranged and that a device (25) for setting a predetermined ratio (%) of the amounts of material from the shredding lines (Z1, Z2) in front of the

Drying device (T) is arranged.

Plant according to claim 1, characterized in that in the first

Shredding line (Z1) at least one drum chipper (8) (drum chipper) and a subsequent knife ring chipper (9) with a fixed axis of rotation are arranged.

Plant according to claim 1 or 2, characterized in that in the second shredding line (Z2) at least one knife ring chipper (7) with a displaceable axis (12) is arranged, the knife ring (1 1) preferably rotating on fixed beams or round wood for production is passed by coarse chips.

Plant according to one or more of the preceding claims, characterized in that the screening device (S) is suitable for dividing the dried material (Mt) into two fractions (F1, F2) based on its length and/or its width.

5. Plant according to one or more of the preceding claims, characterized in that a bunker (21) for storing the coarser fraction (F1) with the spreading head (2) for spreading a middle layer (15) of the grit mat (4) and the bunker ( 22) for storing the finer fraction (F2) is arranged operatively connected to the scattering head (2) of the outer layers (16).

6. Plant according to one or more of the preceding claims, characterized in that a bunker (21) for storing the coarser fraction (F1) with the spreading head (2) for spreading the outer layers (16) of the grit mat (4) and the bunker (22) is arranged to be operatively connected to the spreading head (2) of the middle layer (15) for storing the finer fraction (F2).

7. Plant according to one or more of the preceding claims, characterized in that classifying scattering heads (2) are arranged for the classified scattering of the fractions F1 and / or F2.

8. Plant according to one or more of the preceding claims, characterized in that the screening device (S) is suitable for the dry material (Mt) a third fraction (F3), preferably a smaller grain size than that of the first or second fraction (F1, F2), and this preferably with a further comminution line (Z3), preferably one

Impact mill (18), is operatively connected.

9. Plant according to one or more of the preceding claims, characterized in that the bunker (23) of the third fraction (F3) with the

Spreading head (2) is operatively connected to produce a cover layer (17) of the spreading material mat (4).

10. Plant according to one or more of the preceding claims, characterized in that for separating a fourth fraction (F4), preferably the fines, from the dried material (Mt) and / or from the third fraction (F3), a sieve, in particular and after the shredding line (Z3), is arranged, particularly preferably a bunker (24) of the fourth fraction (F4) being operatively connected to a thermal utilization (V).

1 1 . System according to one or more of the preceding claims, characterized in that in operative connection with the device (25).

Adjustment of the ratio (%) of the material to be transferred to the drying device (T) from the shredding lines (Z1, Z2).

Control device (20) is arranged.

12. Process for producing a, preferably at least partially oriented

scattered, material plate according to the following process steps, with cellulose-containing material (M)

shredded in at least one shredding line (Z1, Z2),

dried in a drying device (T) to dry material (Mt), then divided into at least two fractions (F1, F2) using a sieving device (S) and

at least one of the fractions (F1, F2) is deposited in a spreading system (1) by means of at least one spreading head (2) on an endlessly rotating forming belt (3) to form a spreading material mat (4) and

the grit mat (4) is finally pressed in a press (5) to form a material plate (6), characterized in that

the present material (M) proportionately in a first and second

Shredding line (Z1, Z2) is prepared differently and that the material from these shredding lines (Z1, Z2) is prepared in a predetermined manner

Ratio (%) to each other are fed to the drying device (T) for drying.

13. Method according to the preceding method claim, thereby

characterized in that a first shredding line (Z1) consists of conveyor technology and at least one drum chipper (8) (drum chipper) and a subsequent knife ring chipper (9) with a fixed axis of rotation. (a3)

14. Method according to one or more of the preceding

Method claims, characterized in that a second

Shredding line (Z2) consisting of conveyor technology and at least one

Knife ring cutter (7) has a movable axis (12), with the knife ring (1 1) rotating on fixed beams or round wood

Production of coarse chips is passed.

15. Method according to one or more of the preceding

Process claims, characterized in that the material (M) is pre-sorted based on its properties and differentiated accordingly

Shredding lines (Z1, Z2) is fed.

16. Method according to one or more of the preceding

Method claims, characterized in that the dried material (Mt) is divided into two fractions (F1, F2) based on its length and/or its width.

17. Method according to one or more of the preceding

Method claims, characterized in that the coarser fraction F1 is used to scatter a middle layer (15) of the grit mat (4) and the finer fraction F2 is used to scatter the outer layers (16).

18. Method according to one or more of the preceding

Method claims, characterized in that the finer fraction F2 is used to scatter a middle layer (15) of the grit mat (4) and the coarser fraction F1 is used to scatter the outer layers (16).

19. Method according to one or more of the preceding

Method claims, characterized in that the fractions F1 and/or F2 are scattered in a classified manner in at least one scattering head (2).

20. Method according to one or more of the preceding

Method claims, characterized in that a third fraction (F3) containing fine material is deposited from the dried material (Mt), whereby The proportion of the third fraction is preferably adjusted depending on the required throughput of the fine material.

21. Method according to one or more of the preceding

Method claims, characterized in that the third fraction is fed to a further comminution line (Z3), preferably an impact mill (18).

22. Method according to one or more of the preceding

Method claims, characterized in that the third fraction (F3) is used to produce cover layers (17) of the grit mat (4).

23. Method according to one or more of the preceding

Method claims, characterized in that fine particles as the fourth fraction (F4), preferably dust, from the fractions (F1, F2) or the dried material (Mt), in particular from the third fraction (F3) before and after the comminution line (Z3), separated by means of a sieve (19) and fed to thermal recycling (V).

24. Method according to one or more of the preceding

Method claims, characterized in that by means of a

Control device (20) a device (25) for adjusting the

Mixing ratio of the material to be transferred to the drying device (T) from the comminution lines Z1, Z2 is controlled, preferably depending on predetermined parameters or tables, most preferably including measured values from parts of the system, which are used to transmit the measured values to the control device (20 ) are effectively connected.