DE202017103069U1 - Spreader for producing a grit mat - Google Patents

Abstract

A scattering system for producing a spreading material mat which is formed on an endless circulating forming belt (70) arranged in the direction of a spreading material under a spreading head (30), comprising a metering hopper (10) for at least temporarily receiving spreading material in operative connection with a dispensing device (20) for metered dispensing the scattering material to the scattering head (30) and a scattering head (30) for scattering the grit on the under the spreading head (30) arranged forming belt (70) for producing at least a portion of the grit mat (80), wherein the scattering head (30) in the upper region (31) a dissolution device (34) and in the lower region (32) form band side has a scattering device; characterized in that for adjusting the scattering properties of the scattering head (30) and / or the construction of the spreading material mat (80), the opening device (34) of the first region (31) and the scattering device (36) of the second region (32) to each other, preferably parallel to Level of the forming belt (70), slidably disposed.

Description

The present invention relates to a spreader for producing a grit mat according to the preamble of claim 1.

In particular, in the production of material plates from scatterable materials, a mixture of particles or fibrous materials and a binder is scattered to a grit 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. The usual material plates that are produced in this case are usually MDF, chipboard or OSB boards or comparable multilayer boards. Orientable grit is used especially for OSB boards. But grit for MDF or chip can also be sorted or classified per se and can be sprinkled on different roller arrangements or types in differentiated ways.

The scattering of the grit takes place as needed in one, two or more layers (litter layers), the need for longitudinal and transversely oriented litter layers usually exist for specially differentiated requirements between the middle layers and optionally optional cover layers.

A distinction is made between two scattering possibilities in the scattering stations of a spreading plant; the direct scattering of the grit after the dosing bunker, wherein by means of baffles the grit is fed directly to a forming belt or the indirect scattering over at least one so-called scattering head with scattering roller systems arranged therein. In the case of indirect scattering, the spreading material discharged from the metering hopper drops onto so-called spreading rollers, which divide the spreading material in the spreading head 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 part of the grit 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 or EP 0 860 254 A1 ,

The known state of the art is generally common that the scattering systems, scattering roller systems or scattering heads are designed for a particular type of plate and so far can usually only compensate for different production capacities per unit time. To change the structure of a grit mat accordingly different scattering heads are activated or deactivated in their predetermined order in a system, but usually only possible if it is a highly complex system with a variety of scattering heads.

However, at each change of the layer sequence in the prior art also known to achieve differently constructed grit mats perform a sometimes complex conversion in arrangement and / or execution of the required scattering heads, with the disadvantage associated Umrüst- and life of the scattering respectively the entire system ,

Proceeding from this, the present invention has the object to provide a comparison with the prior art improved scattering system together with this operating method.

In particular, conversion and downtime should be largely avoided. In addition, the scattering grade should be improved primarily in the responsible for the quality of a material plate outer and / or outer layers. This object is achieved by a spreader with the features of the independent claims.

The invention is based on a spreader for producing a grit mat, which is formed on a arranged in the direction of a grit under a scattering head endless circulating mold belt comprising a dosing bins for at least temporarily receiving grit operatively connected to an output device for metered dispensing of the grit to the Scattering head and a scattering head for scattering the grit on the arranged under the scattering head forming belt for producing at least a portion of the grit mat, wherein the scattering head in the upper part of a dissolving device and in the lower region formbandseitig has a scattering device.

The solution for the scattering system is that for adjusting the scattering properties of the scattering head and / or the structure of the spreading material mat, the opening device of the first region and the scattering device of the second region, preferably parallel to the plane of the forming belt, are arranged displaceable relative to each other.

1. a) Die Produktionsvielfalt kann erhöht werden.
2. b) Der Aufwand für die Umsetzung ist maschinentechnisch überschaubar.
3. c) In beiden Produktionsmodi sind durch geringfügiges Verschieben der Bereiche der Separationsgrad und der Schichtaufbau feinstufig einstellbar.
4. d) Durch eine bevorzugte Abkoppelung und damit mögliche Verschiebung des unteren zweiten Bereiches können ohne Eingriffe in die vorhergehenden Anlagenbereiche die Streueigenschaften der Streuanlage signifikant geändert werden.

The solution according to the invention provides the following advantages:

1. a) The production diversity can be increased.
2. b) The effort for the implementation is manageable from a technical point of view.
3. c) In both production modes, the degree of separation and the layer structure can be finely adjusted by slightly shifting the areas.
4. d) By a preferred decoupling and thus possible displacement of the lower second region, the scattering properties of the scattering system can be significantly changed without interfering with the preceding plant areas.

In a preferred embodiment, the scattering head can be arranged in a multipart housing with an upper and lower opening, wherein the dissolving device is mounted in the first region and the scattering device in the second region of the housing. This makes it possible, for example, to arrange the displacement kinematics in the first and / or second region outside the material flow. In particular, retrofitting to existing systems can be carried out particularly easily.

Alternatively or cumulatively, the regions or the multi-part housing can be operatively connected to one another in such a way that they are arranged sealed against the environment during and after the displacement. Before and after the displacement, only the previous openings on the housing should be open to the material flow. Where usually the transition between metering bunker and scattering head is also sealed against the environment and the transition between the lower region and the forming belt is designed as possible so that the burden on the environment is kept as low as possible by scattering grit.

Preferably can be arranged for mutual displacement of the areas linear guides. The invention preferably only converts the displacement of one area and the other area preferably remains stationary. This and / or the linear guide facilitates in particular the sealing of the areas to each other.

Alternatively or cumulatively, at least one region can be suspended from a crossbeam by means of tension elements. In such an embodiment, for example, it is also possible to adjust the angle to the forming belt and / or to the other region for the purpose of elongating or shortening a tension element. Advantageously, such a structure also decouples the displacement work parallel to the forming belt plane from the angular adjustment.

Alternatively or cumulatively, the metering hopper and / or the dispenser may be operatively connected to the upper portion for movement. Thus, advantageously, the area of application of the material to the resolving device can remain unchanged when a displacement is made.

Alternatively or cumulatively, the regions can be arranged to be adjustable at an angle to one another and / or at an angle to the forming belt.

At least one transverse orientation device, a longitudinal orientation device, a roller scattering device and / or a spreader device may be arranged as scattering device. Most preferably, the spreader is a combination of two different devices to enhance the effect of adjusting the stray properties of the spreader and / or the structure of the spreader mat. In particular, it may be provided in this context that the different spreading devices are loaded with differently classified material (portion) by the displacement. For example, the grain size fraction of fractions and / or the type of fraction (coarse / fine) can be adjusted per se in two different scattering devices.

Preferably, a dissolving device and / or a scattering device is provided with rolls that can be set into rotation in or against the production direction.

Alternatively or cumulatively, a distributor device and / or, preferably a pivotable, guide plate can be arranged between the opening device and the spreading device.

In a further embodiment, a control device can be arranged for the selective adjustment of the areas relative to one another and / or the directions of rotation of the rollers.

One possible method is based on the same prerequisites as the device and, in order to adjust the scattering properties of the scattering head and / or the construction of the spreading material mat, the opening device of the first area and the scattering device of the second area are displaced parallel to the plane of the forming belt.

In an adjustment, the opening device and / or the spreading device can preferably be adjusted with regard to their settings, particularly preferably the rotation direction, in the case of existing rollers.

Particularly preferably, a control device could control variable machine elements of the scattering head, preferably adjustment elements for displacing a region and / or the settings of the individual controllable devices in the scattering device.

The litter system according to the invention is preferably suitable for use in a production plant for the automated production of MDF, chip or of OSB and especially as FineOSB formed material plates. OSB advantageously satisfy the mechanical requirements encountered in home and floor covering construction, in particular those of the flexural strength of a panel. The latter correspond advantageously to the generally increased aesthetic requirements, such as required in furniture construction. In particular, this plate has a coatable and / or printable surface.

It should be emphasized that in a preferred embodiment of the scattering system, the dissolving device of the first region has no direct scattering effect on the forming belt, but essentially passes the grit almost completely to the scattering device of the second region.

It should also be emphasized that accompanied by adjustment of the scattering properties of the scattering head and / or the structure of the spreading material mat in a preferred embodiment of the scattering head or the scattering system associated with significant changes in the material plate to be produced. For example, a layer of the material to be spread or the material plate will change significantly in terms of its construction; in particular, in the case of sized layers, the distribution of the classification can change from fine to coarse or turn around.

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

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

• 1 ein erstes Ausführungsbeispiel einer Streuanlage nach der Erfindung zur Herstellung eines Teiles einer Streugutmatte;
• 2. die erfindungsgemäße Streuanlage nach 1 ohne Formband in einer vergleichenden Gegenüberstellung zweier verschiedener Betriebsmodi nach dem Verschieben eines Bereiches von einer ersten Position (oben) in eine zweite Position (unten),
• 3 ein zweites Ausführungsbeispiel umfassend eine Kombination zweier Streuanlagen zur Herstellung von OSB mit einer dreischichtigen Streugutmatte in einem ersten Betriebsmodus der Streuanlagen und
• 4 das Ausführungsbeispiel nach 3 zur Herstellung von FeinOSB aus einer dreischichtigen Streugutmatte in einem zweiten Betriebsmodus der Streuanlagen.

In it show schematically:

• 1 a first embodiment of a scattering system according to the invention for producing a part of a spreading material mat;
• 2 , the scattering system according to the invention 1 without a forming belt in a comparative comparison of two different operating modes after moving a region from a first position (top) to a second position (bottom),
• 3 a second embodiment comprising a combination of two Streuanlagen for the production of OSB with a three-layer spreader mat in a first mode of operation of the Streuanlagen and
• 4 the embodiment according to 3 for producing FeinOSB from a three-layer spreading material mat in a second operating mode of the scattering devices.

In the following description of the preferred embodiments for the production of material plates or the production of grit mat for subsequent pressing / curing according to the present invention, like reference numerals designate the same or similar components. In addition to the benefits of producing a grit made of MDF (medium-density fibers) or chips, the production of a grit mat for an oriented scattered plate (OSB) is probably the most complex arrangement and the invention also shows its greatest utility here, but can be used in any material board manufacturing plant Find application.

1 shows a first embodiment of a scattering system 1 according to the invention for producing a part of a spreading material mat 80 , which in one direction of a scattering material 99 under a scattering head 30 arranged endless circulating forming belt 70 is formed, and in particular in the course of the production of material plates by means of pressure and / or heat in a press (not shown) is pressed and / or cured.

In the 1 illustrated attachment 1 comprises at least one dosing bunker 10 for at least temporary intake of grit and a scattering head 30 for scattering the grit on the under the spreading head 30 arranged forming band 70 , The scattering head 30 has on its upper side at least one feed opening, via which from the dosing bunker 10 via an output device 20 escaping spreading material to the spreading head 30 is supplied. The output device 20 has for this purpose a discharge device 11 in the form of a knock-off roller which separates and discharges the spreading material lying on a conveyor belt and shown in broken lines here. The spreading material can optionally along a guide 21 in the scattering head 30 reach.

In the first area 31 is a dissolving device 34 with spiked rollers 341 arranged. In the second area 32 there is the spreader 36 depending on the embodiment of the spreader 36 classified or unclassified and / or oriented or unoriented on the form band 70 stores.

In the scattering head 30 is therefore an example of a longitudinal orientation device 40 with a group from perpendicular to the production direction P parallel aligned disk rolls 401 with radially to the axial extent of the disk rolls 401 aligned parallel slices 402 above the form band 70 arranged. If, for the purpose of a classified scattering of the grit within a scattering layer, a configuration is preferred, starting from one side of the group, the disks 402 can be arranged within a disk roll 401 each at a greater distance x arranged to each other as the discs 402 the subsequent disk roll 401. Next to it is a transverse orientation device 50 with fans 502 having fan rollers 501 and in the direction of the scattering material of this optionally upstream a distributor 35 arranged. The distribution device 35 may be as a spokes, spiked or other preferred roller arrangement and would provide improved dissolution of the material in front of the transverse orienting means 50 serve.

For improved distribution of the material to be spread between the different spreaders 36 can be a baffle 38 , preferably roof-shaped, are arranged such that the incoming material safely in the transition between the two scattering devices 36 either one or the other is supplied. Particularly preferred is this Leitblleich 38 the second area 32 assigned.

The housing 33 is preferably designed in several parts and includes the two areas 31 and 32 such that the two areas 31 . 32 are mutually displaceable, without the at the transition between the areas 31 . 32 Deposits may arise or spreading material uncontrolled from the spreader 1 can escape.

2 should the scattering system according to the invention 1 without a forming belt in a comparative comparison of two different operating modes after moving an area 31 . 32 from a first position (top) to a second position (bottom). It can be seen that the lower area 32 has been moved from a left first position to a second right position.

The differences between the first and the second position are as follows. In the upper display of the first position, the fine material, which from the Doserbunker 10 is issued essentially by the opening device 34 fall through and thus reaches the baffle 38 from right arranged scattering device. The coarser material is more likely the left of the baffle 38 arranged scatterer 36 fed. This fact, depending on the direction of rotation (not shown) of the rollers of the dissolver 34 strengthened or minimized.

By a shift of the lower spreader 36 respectively the second area 36 will now be the dissolving device 34 coming fine fraction rather the left spreader 36 turn, in particular because by the co-displaced in the present embodiment baffle 38 supports this division.

Since appropriate fixed points could be missing at the 2 represent other embodiments of the invention. For example, that both areas 31 . 32 can be moved to each other.

Alternatively, the 2 also be taken that the dosing bunker 10 may have been moved together with the upper area and the lower area 32 was stationary.

In an unrepresented embodiment could also only area 31 be moved and the guide 21 will readjust or even change according to the shift the task point of the material to be spread on the dissolving device.

3 shows a second embodiment comprising a combination of two Streuanlagen for the production of OSB (material plates with oriented grit) with a three-layer grit mat in a first mode of operation of the scatterers 1 , The illustrated spreading material mat 80 it should have two outer layers 83 , 85 with large-scale chips, which are longitudinal to the production direction P be scattered. The inner layer 84 should be transversely oriented and have rather small orientable grit. The outer longitudinally oriented grit shows the characteristic look and feel of a chipboard (OSB), if such a grit mat 80 in a press (not shown) is pressed. Similar to after 2 The finer and smaller grit is passed through the opening device on the transverse orientation device 50 arrive and across the production direction P stored. The larger orientable spreading material is through the opening device with appropriate rotation of the spiked rollers 401 in the direction of the longitudinal orientation device 40 transported. It is obvious that the two transverse orientation devices 50 the mirror images of each other arranged scattering equipment 1 together a uniform inner layer 84 form.

4 now shows the embodiment after 3 for producing FeinOSB (material plates) from a three-layer compressible spreading material mat in a second operating mode of the scattering devices 1 , Here were the two areas 32 of the two scattering arrangements shifted towards each other. Due to the now changed division of Transfer of the material to be spread from the dissolving device to the spreader 36 , In particular, a two-part spreader, the layer structure changes significantly. More fines are distributed to the outer layers. Will also the direction of rotation of the dissolution devices 34 turned around, the middle class now receives the larger grit and the outer layers of the smaller. This three-layer construction is particularly useful for making FeinOSB which has smaller chips and a different feel on the surface. In connection with two further scattering systems before and against the production direction P For particles or other finer material, the surface can be improved again. In particular, thus Schnitzelplatten can be produced, which may have a directly paintable surface. By arranging the large chips in the inner layer can be avoided by telegraphing to the surfaces of coarse grit.

In summary, it is thus possible that by shifting one of the two areas or both areas, the scattering properties of the scattering head and / or the structure of the spreading material mat can be significantly changed. This circumstance can be assisted by further measures, such as adjustment of the delivery point of the dispenser of the metering hopper to the opening device and / or corresponding parameter changes of the opening device and / or the spreading device. In particular, it would be provided here to adjust the direction of rotation of the opening device accordingly.

LIST OF REFERENCE NUMBERS

1

dispersion unit

10

Dosing hopper

11

discharge

20

output device

21

guide

30

spreading head

31

Area (first)

32

Area (second)

33

casing

34

dissolver

341

spiked rollers

35

distributor

36

spreader

38

baffle

40

Length orienter

401

disk rollers

402

slices

50

Transverse orientation device

501

bin rollers

502

subjects

70

forming belt

80

grit mat

83

outer layer

84

inner layer

85

outer layer

P

production direction

x

distance

State of the art

• DE 10 2007 049 947 A1
• DE 102 06 595 A1
• EP 0 860 254 A1

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102007049947 A1 [0004, 0046]
• DE 10206595 A1 [0004, 0046]
• EP 0860254 A1 [0004, 0046]

Claims (11)

Scattering plant for producing a grit mat, which is formed on a in the direction of a scattering material under a scattering head (30) arranged endless circulating mold belt (70) comprising a Dosierbunker (10) for at least temporarily receiving grit operatively connected to an output device (20) for dosed Output of the grit to the scattering head (30) and a scattering head (30) for scattering the grit on the under the spreading head (30) arranged forming belt (70) for producing at least a portion of the grit mat (80), wherein the scattering head (30) in upper portion (31) has a dissolution device (34) and in the lower region (32) form band side a spreader; characterized in that for adjusting the scattering properties of the scattering head (30) and / or the structure of the spreading material mat (80), the opening device (34) of the first region (31) and the scattering device (36) of the second region (32) to each other, preferably in parallel to the plane of the forming belt (70), slidably disposed. Scattering plant after Claim 1 , characterized in that the spreading head (30) is arranged in a multipart housing (33) with an upper and lower opening, wherein the opening device (34) in the first region (31) and the scattering device (36) in the second region ( 32) of the housing is mounted. Scattering plant after Claim 1 or 2 , characterized in that the regions (31, 32) and the multi-part housing (33) are operatively connected to one another such that they are arranged sealed during and after the displacement relative to the environment. Spreader after one of the previous Claims 1 to 3 , characterized in that for mutual displacement of the regions (31, 32) linear guides are arranged. Scattering system according to one of the preceding claims, characterized in that at least one region (31, 32) is suspended on a crossbar by means of tension elements. Scattering installation according to one of the preceding claims, characterized in that the dosing bunker (10) and / or the output device (20) is operatively connected to the upper region (31) for carrying out a movement. Scattering installation according to one of the preceding claims, characterized in that the areas (31, 32) are arranged to be adjustable at an angle to one another and / or at an angle to the forming belt (70). Scattering system according to one of the preceding claims, wherein as a scattering device (36) at least a transverse orientation device (50), a longitudinal orientation device (40), a roller spreading device and / or - A spoke scattering device is arranged. Scattering installation according to one of the preceding claims, characterized by a dissolving device (34) and / or a scattering device (36) with rolls which can be set in rotation in or against the production direction (P). Scattering system according to one of the preceding claims, characterized in that between the opening device (34) and the scattering device (36) a distributor device (35) and / or, preferably a pivotable baffle (38) is arranged. Scattering installation according to one of the preceding claims, characterized in that a control device is arranged for the selective adjustment of the areas (31, 32) relative to one another and / or the directions of rotation of the rollers.

Images