DE102009007944A1 - Device for distributing free-flowing material to single-or multilayered material web, has wind distributing chamber whose air space is variably adjusted, and separated rough-material particles are moved on material non-woven support - Google Patents

Abstract

The device (1) has a material supplying unit (9) with a wind distributing chamber (3) and a material non-woven support (5). A free-flowing material (2) is inserted the wind distributing chamber by the material supplying unit, and is separated into various rough-material particles. Air space (14) of the wind distributing chamber is variably adjusted, where the separated rough-material particles are moved on the material non-woven support. The wind distributing chamber includes height adjusted and deformable covering regions (25, 26, 27, 35, 36, 37).

Description

The The invention relates to a device for spreading a free-flowing Material to a single or multi-layer material fleece with a Material supply, with a windstrike chamber and with a material fleece cover, in which the free-flowing material by means of the material supply is registered in the windbreak chamber, in which the free-flowing Material within the windscreen chamber in different sizes Material particles is separated, and in which the separated Material particles can settle on the material web support.

Generic devices are well known in the art. Thus, various designs and types of devices with windstrike chambers are well described in the literature, such as in "Principles of Wood Science and Technology" by F. Kollmann, EW Kuenzi and AJ Stamm , in "Taschenbuch der Spanplattentechnik" by Hans-Joachim Deppe and Kurt Ernst and / or in "The Chipboard Primer" by W. Heller , In addition, generic devices are well known from the patent literature. For example, here is the disclosure DE 10 2006 038 183 A1 called, in which a method and a spreader for complete or layered production of a grit mat are described. The grit mat can then be pressed by means of pressure and heat into wood-based panels. In order to be able to apply the spreading material in layers to a later-compressible spreading material mat on a suitable forming belt, the spreading machine comprises a windbreaking chamber, in which the spreading material introduced into the windbreaking chamber can sink onto the forming belt by means of an air volume flow and individual flying screen sieves depending on the respective particle size. Finer and therefore lighter grit particles are further supported by the volume of air as heavier grit particles and thus reach first with respect to the opposite direction of conveyance of the forming belt on the forming belt. Thus, the finer grit particles can be positioned on the outside of the grit mat, while less fine grit particles can ideally continue to position inside the grit mat. An adjustment within the wind raking chambers, how far the individual particles of spreading material can float through the wind raking chamber, can be carried out by means of appropriate flight rake sieves. In support of this, the air volume flow can be varied, with a change in the air volume flow affecting all the particles of grit within the windbreak chamber. However, the performance of such a Windstreukammer particular is already set in the construction, the performance is predetermined in addition to a volume flow generating device especially by the length and / or by the height of the Windstreukammer.

It is the object of the invention generic devices develop further, so that especially grit particles within the Windstreukammer differentiated influenced.

The The object of the invention is a device for scattering a free-flowing material to a single or multi-layered Material fleece with a material supply, with a Windstreukammer and solved with a material web pad, in which the free-flowing material by means of the material supply in the Windstreukammer is registered, in which the free-flowing Material within the windscreen chamber in different sizes Material particles is separated, and in which the separated Can deposit material particles on the material web support, wherein the scattering device is characterized in that a volume of space the windbreak chamber is variably adjustable.

Favorable Way can by means of the variably adjustable volume of space constructive simply additional influence on an air volume flow be taken inside the windbreak chamber. In this way, thereby also the floating period of individual material particles of the free-flowing Materials are well influenced, thereby depositing the material particles depending on the respective grain size Exceptionally precise on the material web pad can be adjusted.

One suitable air volume flow can, for example, by means of a blower device, which air blows into the windstrike chamber, and one Suction device, which sucks air out of the windscrew chamber, be guaranteed.

When free-flowing material comes, for example, chips, glued wood chips, fibers or the like particles lignocellulosic and / or cellulosic materials in question, wherein the present scattering device in particular in the production of chipboard can be used well.

For example the material supply of the scattering device can be preceded by a metering bunker, around the spreader continuously with free-flowing To feed material. A material entry can be further improved when the flowable material by means of an opening roller gets into the windstrike chamber.

Preferably, the Windstreukammer has a variable shell, and it is often sufficient even if individual areas of Windstreukam are variably adjustable in order to make a suitable increase in volume or volume reduction in terms of Windstreukammer can. It is understood that basically any walls of the windbreak chamber can be made variably adjustable. Such a variable shell consists essentially of a bottom or forming belt, a ceiling wall and side walls, with only components thereof need to be made variable. On the bottom band, the particles settle, this is usually a continuous belt or a transport pad.

A preferred embodiment provides that the windstrike chamber has variably adjustable ceiling areas. In particular ceiling areas The windstrike chamber are particularly well designed to be adjustable to become, since these can be varied relatively informally. Side walls were only limited vary, as this almost always the width of the material web pad would have to be considered.

Advantageous It is when the windbreak chamber height adjustable ceiling areas having. By means of height-adjustable ceiling areas one can Change in the volume of space and thus also another Change of air volume flow within the windbreak chamber be achieved structurally simple.

Cumulative or alternatively, it is advantageous if the wind deflector deformable Ceiling areas has. Also by changing individual Ceiling areas can vary the volume of the windscreen chamber become.

A Particularly preferred embodiment provides that the windstrike chamber has at least two chamber zones which characterized by different chamber zone heights. Advantageously, the present Windstreukammer is preferably divided into different chamber zones.

A The first chamber zone essentially serves to accelerate of the flowable material, which preferably over a supply of material vertically into the first chamber zone of the windbreak chamber falls into it. This material is by means of the windbreak chamber forced prevailing air flow in a horizontal movement, so that the material assumes a limbo. Only very rough and so that heavier material particles can be in the first Chamber zone are separated from the remaining material particles.

In a second chamber zone, which downstream of the first chamber zone is, then the material particles can settle out of the air flow, who did not come into limbo. This may be present be achieved in that in the region of the second chamber zone a smaller consistent ceiling height provided or adjusted is, whereby the velocity of the air volume flow in the second chamber zone uniform. This allows then floating larger pieces of material not be entrained more with the air flow. Favorable Way can be a separation of different sizes or heavy material particles even without appropriate screening devices which are substantially vertical within the windstrike chamber to be placed. Of course this does not close from that such screening devices in the present windbreak chamber can be additionally provided.

It understands that join further chamber zones can be adjusted differently in their cross sections could be. Depending on the material condition and task can follow a variety of chamber zones. For example, enlarged The ceiling height in a third chamber zone again such that there then achieves a speed reduction of the air volume flow can be. Insofar, in the third chamber zone finer Lower the residual material better from the airflow.

through Such air volume flow influencing can be separated of the material are regulated very well, even if different Throughput performance profiles driven on the present spreader become.

Around to reduce the risk of having different ceiling heights an air flow reaching critical values and, for example, of one of the ceiling areas can tear off, it is advantageous if height differences between different chamber zone heights bridged by oblique and / or curved ceiling areas.

Of the Air flow can also be varied if the windstrike chamber at least a partial volume flow reduction device having. By means of the Teilvolumenstrommnahmeeinrichtung can a Part air volume flow are directed out of the windstrike chamber, so that in subsequent chamber zones a modified air flow can be adjusted. This can advantageously also on the Separierverhalten within the windstrike chamber influence be taken.

The term "partial volumetric extraction" describes any devices by means of which it is possible is to direct a portion of the wind sweeping chamber flowing through the air volume flow out of the windbreak chamber out. Such a partial volume flow take-off preferably has an adjustment flap in order to be able to set a passage opening of the partial volume flow take-off. Usually, the partial flow is uniform over the width of the scattering chamber or across the width adjustable.

A In this regard, particularly advantageous embodiment provides that each chamber zone of the windbreak chamber a partial volume flow assigned. Thus, there is a possibility after each Chamber zone a partial volume flow out of the windbreak chamber out to be able to lead. It is understood that this several Partial volume flow in terms of their passage openings can be set differently.

has the Windstreukammer chamber walls on whose at least the volume of space facing surfaces are structured, the friction between the air volume flow and the chamber walls of the windbreak chamber be improved.

For example can the surfaces facing the volume of space knob-shaped structures or scale-like structures exhibit.

Point the volume of the surface facing surfaces anti-adhesive coatings On, the risk of unwanted deposits can increase the chamber walls of Windstreukammer additionally reduced become.

A Another advantageous embodiment provides that Space volume limiting components of the windbreak chamber a permeable structure have, through which air, air mixtures, air vapor mixtures and / or steam are blown into the windstrike chamber.

Around also reduce the risk of deposits on screening devices To be able to, it is also advantageous if the windstrike chamber comprises excitable wire and / or spokes.

through the apparatus described here for scattering of free-flowing Material can be a particularly well-separated scattering of the material be achieved with respect to individual Kam merzonen the windstrike chamber. In particular, the windstrike chamber below stationary Discharge funnel or above a continuously running or circulating conveyor, such as those listed above described material non-woven pad as a form of band, be arranged.

Further Advantages, objects and characteristics of the present invention explained on the basis of the following description of the appended drawing, in which, for example, a spreader comprising a windscrew chamber is shown with a variably adjustable volume of space.

It shows

the single figure a device for scattering a free-flowing Materials with a Windstreukammer, the volume of space variable is adjustable.

The device shown in the single figure 1 for sprinkling glued wood chips 2 has a windscrew chamber 3 on, by means of which different sized or heavy glued wood chips particles (for clarity, not explicitly drawn) separated and on a in the conveying direction 4 circumferential band 5 as wood chips fleece 6 can be stored. This is done within the windstrike chamber 3 an airflow 7 provided in this embodiment of a blower 8th can be generated.

The glued wood chips 2 arrive via a material supply 9 in the windbreak chamber 3 , where the wood chips 2 by means of an opening roller 10 already relaxed in the windbreak chamber 3 be registered.

The windstrike chamber 3 has a shell 11 on, which essentially of side walls (not shown here) and of a ceiling wall 12 is formed. A floor area 13 the windstrike chamber 3 is essentially of a material web support as a forming belt 5 or transport document realized. By means of a shell constructed in this way 11 can be a volume of space 14 the windstrike chamber 3 from the surroundings 15 be demarcated, so that within the windstrike chamber 3 the air volume flow 7 targeted in the flow direction 16 through the volume of space 14 can be directed.

A first outstanding feature of the present windbreak chamber 3 lies in the fact that the windstrike chamber 3 in this embodiment, four chamber zones 17 . 18 . 19 and 20 and an adjoining calming zone, not further shown here, wherein the four chamber zones 17 . 18 . 19 and 20 characterized in particular by the fact that on the one hand different ceiling heights 21 . 22 . 23 and 24 exhibit. On the other hand, at least the ceiling heights 22 . 23 and 24 additionally variably adjustable by individual ceiling areas 25 . 26 and 27 the ceiling wall 12 opposite the ground area 13 or the forming belt 5 according to the double arrows 28 . 29 and 30 raised or can be lowered. In this respect, the volume of space can be 14 the windstrike chamber 3 by means of the adjustable ceiling areas 25 . 26 and 27 constructively very simple and individually set, whereby the air flow 7 inside the windbreak chamber 3 Advantageously, can be influenced. As a result, in particular the separation behavior of the windbreaker chamber 3 to be changed.

The first chamber zone 17 essentially serves as entry area for the free-flowing material 2 and as a kind of acceleration zone, in which the registered material 2 by means of the air volume flow 7 is deflected into a substantially horizontal movement. In the first chamber zone 17 ideally settle only very coarse material particles.

In the second chamber zone 18 can not get so rough particles of material on the forming belt 5 settle, with medium coarse and finer material particles by means of the air flow 7 according to the flow direction 16 further into the third chamber zone 19 be directed. In this respect, the second chamber zone 18 For the medium-coarse and finer material particles, a hovering area within the windbreak chamber 3 ,

In the third chamber zone 19 The medium coarse material particles can settle, as a result of the larger ceiling height 23 the flow velocity of the air volume flow 7 is reduced, whereby the medium coarse material particles within the third chamber zone 19 except for the form band 5 can fall. The third chamber zone 19 is thus to be regarded as a hovering area for the finer material particles.

In the fourth chamber zone 20 Now, the finer particles of material can be on the forming belt 5 settle there because of the even larger ceiling height 24 the air volume flow 7 can continue to lose kinetic energy.

So with regard to the different ceiling heights 21 . 22 . 23 and 24 the air volume flow 7 not from the ceiling wall 12 tear off, are the individual at least height adjustable ceiling areas 25 . 26 . 27 preferably with sloping ceiling sections 31 . 32 . 33 or 34 connected with each other.

Cumulatively or alternatively, the ceiling wall 12 also deformable ceiling areas 35 . 36 respectively. 37 (shown here only dashed) comprise, by means of which the ceiling wall 12 can be flexibly designed. As a result, advantageously curved ceiling areas can be realized structurally simple.

In the representation after the single figure is easy to see how the wood chip fleece 6 in the conveying direction 4 of the form band 5 getting higher and higher, being on the forming belt 5 first the finer material particles of the glued wood chips 2 rest. On the finer material particles, the medium-sized material particles, then the coarse material particles and only then the very coarse material particles are arranged, provided that the very coarse material particles were not previously disposed of.

The air volume flow 7 can be further favorably influenced by the shell 11 the windstrike chamber 3 , especially on the ceiling wall 12 , Partial volume removal devices 38 . 39 . 40 . 41 . 42 and 43 are provided. In this respect, the individual Teilvolumenstrommnahmeeinrichtungen 38 . 39 . 40 . 41 . 42 and 43 another outstanding feature of the spreader 1 , especially the windscrew chamber 3 , which may also improve without the other features of the invention known Windstreukammern.

By means of the first partial volume removal device 38 especially in an area just behind the first chamber zone 17 a part of the airflow 7 from the windbreak chamber 3 be derived, whereby the flow behavior of the air flow 7 can be directly influenced. Correspondingly, cumulatively or alternatively by means of the further partial volume removal devices can also be used 39 . 40 . 41 . 42 and 43 Proportions of the air volume flow 7 from the windbreak chamber 3 be derived.

The amount of divertable airflow rates at each of the partial volume takeoff devices 38 . 39 . 40 . 41 . 42 and 43 To be able to determine the openings 44 (Here only in terms of the partial volume removal device 38 numbered) of the partial volume removal devices 38 . 39 . 40 . 41 . 42 and 43 each by means of closure means 45 individually enlarged, reduced or opened or closed.

Additional separation settings result alternatively by sieves 46 . 47 . 48 and 49 which are essentially vertical in the windbreak chamber 3 are fastened. Preferably, the sieves 46 . 47 . 48 and 49 excitable, causing them to vibrate. This reduces the risk that material particles permanently on the screens 46 to 49 can attach.

1

contraption for sprinkling wood chips

2

wood chips

3

Wind scattering chamber

4

conveying direction

5

circulating forming belt

6

Wood chips fleece

7

Airflow

8th

fan

9

material supply

10

opening roller

11

shell

12

ceiling wall

13

floor area

14

volume

15

Surroundings

16

flow direction

17

first chamber zone

18

second chamber zone

19

third chamber zone

20

fourth chamber zone

21

ceiling height the first chamber zone

22

ceiling height the second chamber zone

23

ceiling height the third chamber zone

24

ceiling height the fourth chamber zone

25

first adjustable ceiling area

26

second adjustable ceiling area

27

third adjustable ceiling area

28

first double arrow

29

second double arrow

30

third double arrow

31

first sloping ceiling section

32

second sloping ceiling section

33

third sloping ceiling section

34

fourth sloping ceiling section

35

first deformable ceiling area

36

second deformable ceiling area

37

third deformable ceiling area

38

first Partial flow removal device

39

second Partial flow removal device

40

third Partial flow removal device

41

fourth Partial flow removal device

42

fifth Partial flow removal device

43

sixth Partial flow removal device

44

openings

45

closure means

46

first scree

47

second scree

48

third scree

49

fourth scree

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 102006038183 A1 [0002]

Cited non-patent literature

• Principles of Wood Science and Technology by F. Kollmann, EW Kuenzi and AJ Stamm [0002]
• - "Taschenbuch der Spanplattentechnik" by Hans-Joachim Deppe and Kurt Ernst [0002]
• - "The Particleboard Primer" by W. Heller [0002]

Claims (13)

Contraption ( 1 ) for spreading a free-flowing material ( 2 ) to a single or multilayer material fleece ( 6 ) with a material supply ( 9 ), with a windscrew chamber ( 3 ) and with a material web pad ( 5 ), in which the free-flowing material ( 2 ) by means of the material supply ( 9 ) in the windbreak chamber ( 3 ), in which the free-flowing material ( 2 ) within the windstrike chamber ( 3 ) is separated into differently coarse material particles, and in which the separated material particles on the material web support ( 5 ), characterized in that a volume of space ( 14 ) the windstrike chamber ( 3 ) is variably adjustable. Spreading device ( 1 ) according to claim 1, characterized in that the windbreak chamber ( 3 ) variably adjustable ceiling areas ( 25 . 26 . 27 ) having. Spreading device ( 1 ) according to claim 1 or 2, characterized in that the windbreak chamber ( 3 ) height-adjustable ceiling areas ( 25 . 26 . 27 ) having. Spreading device ( 1 ) according to one of claims 1 to 3, characterized in that the windbreak chamber ( 3 ) deformable ceiling areas ( 35 . 36 . 37 ) having. Spreading device ( 1 ) according to one of claims 1 to 4, characterized in that the windbreak chamber ( 3 ) at least two chamber zones ( 17 . 18 . 19 . 20 ), which by different chamber zone heights ( 21 . 22 . 23 . 24 ) Marked are. Spreading device ( 1 ) according to one of claims 1 to 5, characterized in that height differences between different chamber zone heights ( 21 . 22 . 23 . 24 ) by means of inclined and / or curved ceiling areas ( 31 . 32 . 33 . 34 . 35 . 36 . 37 ) are bridged. Spreading device ( 1 ) according to one of claims 1 to 6, characterized in that the windbreak chamber ( 3 ) at least one partial volume removal device ( 38 . 39 . 40 . 41 . 42 . 43 ) having. Spreading device ( 1 ) according to one of claims 1 to 7, characterized in that each chamber zone ( 17 . 18 . 19 . 20 ) the windstrike chamber ( 3 ) a partial volume removal device ( 38 . 39 . 40 . 41 . 42 . 43 ) assigned. Spreading device ( 1 ) according to one of claims 1 to 8, characterized in that the windbreak chamber ( 3 ) Has chamber walls whose volume ( 14 ) facing surfaces are structured. Spreading device ( 1 ) according to claim 9, characterized in that the space volume ( 14 ) facing surfaces have knob-shaped structures or scale-like structures. Spreading device ( 1 ) according to claim 9 or 10, characterized in that the space volume ( 14 ) facing surfaces have anti-adhesive coatings. Spreading device ( 1 ) according to one of claims 1 to 11, characterized in that the volume of space ( 14 ) limiting components of the windbreak chamber ( 3 ) have a permeable structure, through which air, mixtures of air gases, air-vapor mixtures and / or steam into the windbreak chamber ( 3 ) are inflatable. Spreading device ( 1 ) according to one of claims 1 to 12, characterized in that the windbreak chamber ( 3 ) excitable wire and / or spokes ( 46 . 47 . 48 . 49 ).