EP3802035A1

EP3802035A1 - Process and system for producing a material panel and a pressed material mat

Info

Publication number: EP3802035A1
Application number: EP19732905.5A
Authority: EP
Inventors: Felix Hofmann; Jochen KAMM; Jan Kasten
Original assignee: Dieffenbacher GmbH Maschinen und Anlagenbau
Current assignee: Dieffenbacher GmbH Maschinen und Anlagenbau
Priority date: 2018-05-28
Filing date: 2019-05-28
Publication date: 2021-04-14
Also published as: CN112512766A; DE102018112727B4; WO2019229007A1; DE102018112727A1

Abstract

The invention relates to a method for producing a material panel (6), comprising the following steps: producing a pressed material mat (1) on a shaped strip (10), wherein the pressed material mat (1), transversely to the direction of production (9), has at least one main material (2) optionally with the addition of a binding agent, transferring the pressed material mat (1) into a press (14), preferably a continuously operating press (14), and pressing the compressed-material mat (1) under pressure and/or heat to form a pressed plate (5), which is trimmed after the pressing of a material panel (6). The invention is characterized in that the pressed material mat (1) further comprises an auxiliary material (3) which is applied in the direction of production (9) in addition to the main material (2), and the auxiliary material (3) after pressing by the pressed plate (5) is at least partially, preferably completely, separated and the main material (2) forms the material panel (6). The invention further relates to a system (20) for producing material panels (6) and to a pressed material mat (1).

Description

METHOD AND APPENDIX FOR THE MANUFACTURE

A MATERIAL PLATE AND PRESS GOOD MATERIAL

The present invention relates to a method for the production of material plates according to the preamble of claim 1, a plant for the production of material plates according to the preamble of claim 13 and a pressed material mat according to the preamble of claim 18.

Material boards of any kind such as chipboard, fiber and insulation boards or

Composite fiber boards which consist of synthetic or natural fibers embedded in a thermosetting or thermoplastic plastic, or rubber sheets are nowadays in many areas such as furniture, housing or lightweight automotive application. To produce such material plates, a starting material is first applied to a substrate to a mat and then pressed and / or cured under pressure and / or heat to the material plate. This is usually done in a continuous process, in which first an endless mat is discharged onto a forming belt and the endless plate strand after the

Pressing and / or curing is divided into plates of finite length. Particular attention is given to the edge of the plate, which extends along the direction of production. By the pressing process, it can, in particular in the use of flowable starting materials or those that develop flowabilities during the pressing process, to form an undefined plate edge, the properties of which, for example

Reason of different density or changed

Material composition fail different from the produced material plate. Since such irregularities are also the property of

Material plate affect the pressed and / or hardened plate strand after pressing at the plate edges generously trimmed to remove inhomogeneities.

For example, it is known from DE 198 05 996 A1 to seal the applied mat with a coating tape with respect to the forming belt or a further coating tape in order to avoid a growth of the width of the mat during the pressing.

Alternatively, it is known for example from DE 33 47 877 A1 or DE 29 23 036 A1 in a continuously operating press laterally along the

Pressing a wire or a Seitenbegrenzungsband to arrange or run in the press. As a result, the press nip is sideways

sealed and the material to be pressed can only in one

move certain frames so that the formation of inhomogeneous peripheral areas is avoided.

In the field of fiber composites is for example from the

The production of fiber-reinforced molded parts from a resin preparation layer is known, in which a belt is fed along the edges in a flexing and impregnating region, so that a lateral boundary is formed for the fibers to be mixed and the resin formulation layer. Through the belt running a complete wetting of the fibers is achieved, so that in particular can be dispensed with a trimming of the edge regions before further processing.

From DE 198 47 814 B4 process for the production of pressed slabs is known, wherein the formation and transport of the pressed material on the mat Form band in a space on the longitudinal sides by running perpendicular vertical side support bands limited space takes place to ensure a

perfect side boundary of the pressed material until leaving the finished plate from the press.

The use of sidebands, wires or the like has proven itself in principle. However, the production of different material plates on a press is also significantly limited. So the sidebands are usually aligned only to a certain width and a certain height. Although there are sidebands, which are compressible, for example, whereby, however, the required width increases and thus reduces the width of the material plate to be produced. In addition, the use of sidebands associated with an increased effort for the maintenance and cleaning of these.

Therefore, the object of the present invention is a method, a

Specify device and a Pressgutmatte in which the lateral edge seal can be flexibly adapted to the particular needs, especially height, width and / or material changes.

It is a further object of the present invention a method, a

Specify device and a Pressgutmatte in which the maintenance and cleaning is minimized.

A further object of the present invention is to provide a method, a device and a pressed material mat in which the

Width growth of the press mat is limited during pressing.

These and other objects are achieved by a method and a plant for the production of material plates and a pressed material mat as set forth in the independent claims. As a first solution, we specify a method for producing a material plate, comprising the steps of: producing a pressed material mat on a forming belt, wherein the pressed material mat comprises at least one main material, optionally with the admixture of a binder, transverse to the production direction,

Transferring the pressed material mat in a press, preferably a continuously operating press, and pressing the pressed material mat under pressure and / or heat to a compressed plate which is trimmed after pressing to a material plate. The method distinguishes that the

Pressgutmatte further comprises an auxiliary material, which is applied in the production direction next to the main material and the auxiliary material after the pressing of the pressed plate at least partially, preferably completely separated and the main material forms the material plate.

By using an auxiliary material, which also on the

Forming tape is applied as part of the press mat, this can

Adapted to the respective mat height of the main material as needed. Even with an altered width of the main material, the auxiliary material can be applied laterally to the main material. Thus flexible material plates of different width and height can be produced in the same system. Although the auxiliary material is part of the pressed material mat, it is removed again after the pressing, so that the material plate is predominantly formed by the main material. The use of auxiliary material can be easily integrated into existing processes and facilities without the need for major refurbishment.

A preferred embodiment is characterized in that after the

Pressing the Pressgutmatte a preferably inhomogeneous

Transition region between the main material and auxiliary material forms. Due to the exertion of pressure and / or heat, movements of the main material can occur, especially with flowable materials, so that this main material is to a small extent at the boundary region of the main material and Auxiliary material flow into the auxiliary material and can connect to this.

Preferably, the main material and the auxiliary material are applied simultaneously to the forming belt, whereby the system can be made compact. Alternatively, the main material and the auxiliary material may be sequentially applied to the forming belt. This allows the exact application of the respective materials in a defined width and the exact spreading of the auxiliary material next to the main material.

Preferably, after applying the main material, the main material is trimmed, and then the auxiliary material is discharged. By trimming the main material after application to the form band an exact mat is produced at the trimmed edges of the auxiliary material

In a preferred embodiment, the main material and the auxiliary material are different in their chemical and / or physical properties. In particular, the auxiliary material is a different material than the main material. The main material may be, for example, chips, chips or cellulosic fibers, in particular

lignocellulosic material, plastics, resin approaches or natural or artificial fibers. Also mixtures of such materials may form the main material. The main material can be both in solid form,

for example, as chips, fibers or granules, or in a

flowable, in particular viscous form are present. The auxiliary material may consist of the same materials. Preferably, only one type of material is used as the auxiliary material, which contains only an insignificant proportion of other materials. The auxiliary material should preferably be in solid form to ensure adequate sealing of the rim.

A further embodiment is characterized in that the application of the

Main material and / or auxiliary material is carried out by scattering. The Main material can be scattered to a single or multi-layer part-Pressgutmatte. The auxiliary material is preferably only one layer.

Alternatively or in combination, the pressed material mat is applied to an intermediate layer and / or the pressed material mat before pressing with a

Liner covered. By the liner dirt can be avoided on the forming belt and / or in the press, for example, by caking. The intermediate layer is preferably made of plastic, fibers or paper.

Preferably, the intermediate layer after pressing of the

pressed plate removed. Alternatively, at least the on the

Pressgutmatte lying intermediate layer are removed before pressing. Further, the upper or lower liner may be formed endlessly and the consumption of intermediate layer.

The method is further characterized in that the auxiliary material is applied with a width of less than 80 mm, preferably less than 60 mm, more preferably less than 45 mm, most preferably less than 30 mm. Due to a small width, the use of auxiliary material can be optimized. The required width may depend on the flowability of the main material and the necessary seal.

Preferably, the auxiliary material is free of binder and / or a residue from the treatment of the main material. The binder-freedom in the

Auxiliary material allows for easier separation of the auxiliary material from the main material, and the auxiliary material is easier for further recovery

Processing or processing processes are supplied. For a good edge seal by the auxiliary material this particular

have interlocking properties to achieve a seal of the main material. In the extraction of the main material in a recycling process or digestion process, it is particularly appropriate to use the resulting residual materials as auxiliary material in the further process with regard to resource efficiency. In this case, residual substances can also adhere to the auxiliary material, which can contribute to an adhesion of the auxiliary material particles to one another.

Preferably, the pressed plate is trimmed several times, wherein

In particular, in a first step, essentially only the auxiliary material is separated from the pressed plate and in a second step at least the transition region is separated off. Due to the multiple trimming, the materials used can be separated better.

Alternatively or in combination, the separated auxiliary material and / or the separated transition region are treated and recycled to the process. The valuable main material can be recovered from the transition area. In particular, the pure auxiliary material can be returned to the process immediately.

As a further solution, a plant for producing a material plate, in particular for carrying out a method as stated above, comprising a forming belt, means for discharging at least one main material optionally with admixture of a binder for producing a pressed material on the forming belt, a preferred

continuously operating press for pressing the pressed material mat under pressure and / or heat to a plate and a trimming device for

Trimming the plate to a material plate. The plant records that a further device for applying an auxiliary material is arranged as part of the pressed material mat next to the main material in front of the press.

Another embodiment of the device is characterized in that

Device for applying the main material before and / or after Device for applying the auxiliary material is arranged. The arrangement may also be dependent on the main material used. at

Main materials which are already flowable during application, the application of the auxiliary material is recommended in front of the main material.

Alternatively, it is also conceivable that the discharged main material is first precompressed in a pre-press and only then the auxiliary material is applied.

Preferably, the means for applying the main material and the means for applying the auxiliary material in a unit

arranged in a group. As a result, the length of the entire system can be reduced.

A preferred embodiment is characterized in that the means for applying the main material and / or auxiliary material is a scattering device, which preferably comprises scattering walls, in which the main material and / or auxiliary material is scattered. Through the use of scattering walls, the main material and / or auxiliary material can be spread in a precisely desired width.

Alternatively or in combination, the trimming device comprises at least two devices for trimming the pressed plate, which are preferably arranged one after the other. Thus, initially with the first device of the plate can be trimmed in such a way that the auxiliary material is removed, and with the second device, the removal of the transition region of the plate takes place. After trimming thus results in the desired material plate.

As yet another solution, a pressed material mat, which is pressed in a press to a plate, in particular produced according to one of the above methods, specified, wherein the pressed material mat of at least one main material and at least one auxiliary material is constructed and that Auxiliary material from the pressed plate after pressing at least partially, preferably completely separated.

Alternatively or in combination, the auxiliary material is arranged in the production direction next to the main material and / or the auxiliary material divides the main material into at least two sections. The auxiliary material may be at a distance from the main material or directly adjacent to the

Main material can be arranged.

Preferably, the auxiliary material is free of binder and / or a residue from the treatment of the main material.

A preferred embodiment of the pressed material mat is characterized in that the auxiliary material is applied with a width of less than 80 mm, preferably less than 60 mm, more preferably less than 45 mm, most preferably less than 30 mm.

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

Description with the drawings. The invention will be described below in detail with reference to the figures.

Show it

Figure 1 shows a first embodiment of a system according to the invention for

Production of material plates in a side view;

Figure 2 shows the embodiment of the invention according to Figure 1 in a plan view; Figure 3 shows a further embodiment of the system according to the invention in a

Top view;

FIG. 4 a section through the pressed material mat; and

Figure 5 shows a section through the pressed plate. In Fig. 1 is a plant 20 according to the invention for the production of

Material plates 6 shown in a side view. For this purpose, a main material 2 is first applied to a forming belt 10 via a device 11.

The main material 2 may for example be placed on the forming belt 10 by the device 11 or discharged. Alternatively, the

Device 11 may also be constructed as a scattering device, so that the main material 2 is sprinkled onto the forming belt 10. Depending on the type of

Main material 2, it may be useful that when applying the

Main material 2 one or more side boundaries, such as discharge boxes or scattering walls, are arranged to limit the spatial extent of the main material 2 directly above the forming belt 10.

This can be done with viscous or lightweight materials, among others

Main material 2 be relevant.

In the exemplary embodiment shown here, in the production direction 9 adjacent to the device 11 for discharging the main material 2, a further device 12 for applying an auxiliary material 3 is arranged. The device 12 is arranged such that the auxiliary material 3 is applied to the forming belt 10 in addition to the main material 2. Like the main material 2, the auxiliary material 3 can also be applied to the forming belt 10, laid on or scattered, and the device 12 can be designed accordingly as an application or application device, scattering device or nozzle.

Furthermore, the auxiliary material 3 can be applied in a laterally limited space, which delimits the auxiliary material 3 to the main material 2 towards and / or opposite thereto. As an alternative to the embodiment shown here, the devices 11 and 12 can also be used as a

be formed common unit, so that the main material 2 and the auxiliary material 3 can be applied simultaneously to the forming belt 10. As the main material 2, first, any material for producing a

Material plate 6 come into consideration. Thus, the main material 2 may be lignocellulosic material such as chips or fibers. The use of plastics, in particular resin approaches or fiber-reinforced plastics, or mixtures in solid or viscous form are as

Main material 2 conceivable. The main material 2 may also be mixed with a binder such as urea or isocyanate glue or melted fiber fibers to form a bond between the individual components of the main material 3. The auxiliary material 3 differs in particular in its chemical and / or physical properties of the main material 2. This allows a clear separation between the main material 2 and auxiliary material 3, which is removed after pressing the pressed material 1 from the pressed plate 5 again. In particular, the auxiliary material 3 can be a cost-effective material or a waste product from an upstream processing process for the main material 2. Also, the auxiliary material 3, a binder may be added. However, the preferred

Admixing a binder in the auxiliary material 3 avoided so that it can be easily separated from the compressed plate 5 and a potential cycle process can be fed back.

After the production of the pressed material mat 1, this is fed to a compression in a continuously operating press 14. Instead of one

continuous press 14 can also be a single or

Multi-daylight press can be used. Depending on the main material 2 and auxiliary material 3 used, the pressed product mat 1 can be precompressed before the press 14 in a pre-press 13. A preheating of the pressed material mat 1 by means of steam or microwaves or spraying the pressed material mat 1 with a liquid, for example water, aqueous solutions or emulsions, can have a positive influence on the compression of the pressed material mat 1 to a pressed plate 5 in the press 14. FIGS. 4 and 5 each show, by way of example, a section through pressed material mat 1 (FIG. 4) or the pressed plate 5 (FIG. 5). The press material mat 1 resting on the forming belt 10 shown in FIG. 4, which has not yet been fed to the press 14 or a pre-press, comprises a

Flämmaterial 2, which is enclosed on sides of an auxiliary material 3. In this case, the auxiliary material 3 is arranged directly adjacent to the main material 2, wherein a gap can be formed between the main material 2 and auxiliary material 3, especially when using lateral boundaries in the discharge of the materials. The use of the auxiliary material 3 should be minimized, so that the width of a strip to the auxiliary material 3 is less than 80 mm, preferably less than 60 mm, more preferably less than 45 mm, in particular less than 30 mm.

In the illustrated in Figure 5 compressed plate 5, which from the

Pressgutmatte 1 was produced in accordance with Figure 4 by compression, in addition to the areas for Flauptmaterial 2 and H ilfsmaterial 3 a

Transition region 4 is formed, which consists of a mixture of

Main material 2 and auxiliary material 3 consists. By the pressure on the

Pressgutmatte 1 in the pre-press 13 and / or the press 14 is the

The main material 2 and the auxiliary material 3 are moved towards one another in the boundary region and partially mix to form a transitional region 4.

The main material 2 and the auxiliary material 3 may have identical fleas in the pressed material mat 1. Depending on the density of the bulk material 2 or the auxiliary material 3, the fleas of the individual partial areas of the pressed product mat 1 may be different. In particular, the partial area of the pressed material mat 1 with auxiliary material 3 can have a mat height that is up to 20% higher than the partial area with the main material 2, so that the auxiliary material 3 holds the main material 2 better in its shape or that during pressing less pressure is exerted on the main material 2. As shown in Figure 1, the pressed plate 5 is fed to the press 14 by a further conveying means 18, which may be formed as a roller conveyor or conveyor belt, a trimming device 15. In the

Trimming device 15, the edges of the pressed plate 5 are trimmed and this divided into material plates 6. Preferably, the

Trimming device 15 of two devices 16 and 17 for trimming the pressed plate 5, wherein in the first device 16, only the region of the auxiliary material 3 is separated from the compressed plate 5 and in the second device 17, the transition region 4 is removed from the plate 5. The separated auxiliary material 3 can directly the device 12 for

Discharging the auxiliary material 3 supplied, so that here a cycle can arise. The separated transition region 4 can be supplied to a treatment in which it can be separated in main material 2 and auxiliary material 3 and at least partially fed to a re-processing in the system 20. After the trimming of the pressed plate 5, finally, the material plate 6, which is constructed from the main material 2, is obtained.

In Figure 2, the system 20 is shown in Figure 1 in a plan view from above. On the forming belt 10, a partial press material mat 1 from the main material 2 over a certain width of the forming belt 10 is scattered by means of a device 1 1. The main material 2 can alternatively not be applied directly to the forming belt 10, but for example to a

Interlayer, which rests on the forming belt 10. In the production direction 9, two means 12 for dispensing the auxiliary material 3 are then arranged, which laterally adjacent to the main material 2 on the forming belt 10 or the intermediate layer. After dispensing of the auxiliary material 3, another intermediate layer may also be placed on the pressed material mat 1 before being pressed in the pre-press 13 or the press 14. The upper as well as the lower intermediate layer, which may be formed as disposable layers or as circulating belts, can be removed again after the pressing or also of the pressed plate remain and be removed after a further process such as maturing by peeling or grinding the material plate 6.

Furthermore, in Fig. 2 after the pre-press 13 of the transition region 4 in the press material mat 1 and the compressed plate 5 between the inner edge of the auxiliary material 3 and the main material 2 extending dashed line shown.

FIG. 3 shows a further alternative embodiment of a

inventive system 20 shown. This apparatus 20 differs from the preceding embodiments in that immediately after the means 11 for discharging the main material 2, a device 19 for trimming the edges of the discharged main material 2 is arranged. In particular, when spreading the main material 2 without lateral limitation of a scattering space or a scattering surface with the device 11, it may happen that the edges washed out and the height of the scattered

Pressgutmatte 1 decreases towards the outside. By the device 19, the edges of the main material 2 are exactly defined and the auxiliary material 3 can be better applied to these edges adjacent. As a result, the transition region 4 formed in the following process can also be kept smaller.

Tag List P1589DE:

1 pressed material mat

2 main material 3 auxiliary material

4 transition area

5 plate

6 material plate 7

8th

9 production direction

10 Form band 1 1 Setup 12 Setup 13 Pre-press

14 press

15 trimming device

16 device 17 device 18 conveying means

19 device

20 attachment

Claims

claims

1. A method for producing a material plate (6), comprising the steps:

Production of a pressed material mat (1) on a forming belt (10), wherein the

Pressgutmatte (1) transversely to the production direction (9) at least one

Main material (2) optionally with the admixture of a binder, transferring the pressed material mat (1) in a press (14), preferably a continuously operating press (14), and

Pressing the pressed material mat (1) under pressure and / or heat to a pressed plate (5), which is trimmed after being pressed into a material plate (6), characterized in that

the pressed material mat (1) further comprises an auxiliary material (3) which is applied in the production direction (9) next to the main material (2) and the auxiliary material (3) after pressing from the compressed plate (5) at least partially, preferably completely separated and the

Main material (2) forms the material plate (6).

2. The method according to claim 1, characterized in that after the pressing of the pressed material mat (1) is preferably inhomogeneous

Forming transition region (4) between the main material (2) and auxiliary material (3) in the pressed plate.

3. The method according to any one of the preceding claims, characterized

characterized in that the main material (2) and the auxiliary material (3) be applied simultaneously or in succession.

4. The method according to any one of the preceding claims, characterized

characterized in that the main material (2) and the auxiliary material (3) are different in their chemical and / or physical properties.

5. The method according to any one of the preceding claims, characterized

characterized in that after applying the main material (2) the main material (2) is trimmed and then the auxiliary material (3) is applied.

6. The method according to any one of the preceding claims, characterized

characterized in that the application of the main material (2) and / or auxiliary material (3) is effected by scattering.

7. The method according to any one of the preceding claims, characterized

in that the pressed material mat (1) is applied to an intermediate layer and / or the pressed material mat (1) is covered with an intermediate layer before being pressed.

8. The method according to any one of the preceding claims, characterized

characterized in that the intermediate layer is removed after the pressing of the pressed plate (5).

9. The method according to any one of the preceding claims, characterized

in that the auxiliary material (3) is applied with a width of less than 80 mm, preferably less than 60 mm, particularly preferably less than 45 mm, most preferably less than 30 mm.

10. The method according to any one of the preceding claims, characterized

characterized in that the auxiliary material (3) is free of binder and / or a residue from the treatment of the main material (2).

11.Verfahren according to any one of the preceding claims, characterized

characterized in that the pressed plate (5) is trimmed several times, wherein in a first step substantially only the auxiliary material (3) is separated from the pressed plate (5) and in a second step at least the transition region (4) is severed.

12. The method according to any one of the preceding claims, characterized

characterized in that the separated auxiliary material (3) and / or the separated transition region (4) is treated and recycled to the process.

13. Plant (20) for producing a material plate (6), in particular for carrying out a method according to one of claims 1 to 12, comprising:

a form band;

a device (11) for discharging at least one main material (2) optionally with the admixture of a binder for producing a

Pressgutmatte (1) on the forming belt (10);

a preferably continuously operating press (14) for pressing the pressed material mat (1) under pressure and / or heat to a plate (5); and a trimming device (15) for trimming the plate (5) to a material plate,

characterized in that a further device (12) for

Application of an auxiliary material (3) as part of the pressed material mat (1) next to the main material (2) in front of the press (14) is arranged.

14. Plant (20) according to claim 13, characterized in that the

Means (11) for applying the main material (2) before and / or after the means (12) for applying the auxiliary material (3) is arranged.

15. Plant (20) according to claim 13, characterized in that the

Device (11) for applying the main material (2) and the device (12) for applying the auxiliary material (3) in a unit

are arranged in a group.

16. Plant (20) according to any one of claims 13 to 15, characterized

in that the device (11, 12) for applying the

Main material (2) and / or auxiliary material (3) is a scattering device, which preferably comprises scattering walls, in which the main material (2) and / or auxiliary material (3) is scattered.

17. Plant (20) according to any one of claims 13 to 16, characterized

in that the trimming device (15) has at least two

Devices (16, 17) for trimming the pressed plate (5), which are preferably arranged one after the other.

18. Pressgutmatte (1) which is pressed in a press (14) to a plate (5), in particular produced by a method according to one of

Claims 1 to 12, characterized in that the pressed material mat (1) from at least one main material (2) and at least one auxiliary material (3) is constructed and that auxiliary material (3) of the compressed plate (5) after pressing at least partially, preferably is completely separated.

19. Pressgutmatte (1) according to claim 18, characterized in that the auxiliary material (3) in the production direction (9) next to the main material (2) is arranged and / or the auxiliary material (3) divides the main material (2) into at least two sections ,

20. Pressgutmatte (1) according to any one of claims 18 to 19, characterized characterized in that the auxiliary material (3) is free of binder and / or a residue from the treatment of the main material (2). Pressgutmatte (1) according to any one of claims 18 to 20, characterized