WO2017207449A1

WO2017207449A1 - Distributing apparatus and method for supplying particulate material continuously to a forming belt

Info

Publication number: WO2017207449A1
Application number: PCT/EP2017/062815
Authority: WO
Inventors: Klaus Plutowsky
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: CN107443539A; DE102016110073A1; CN207509432U

Abstract

The present invention relates to a distributing apparatus (18) for supplying particulate material (14) continuously to a circulating forming belt (16), having a discharging roller (22) for discharging the particulate material from a particulate-material store (12); and having a directing apparatus (24) which, for the purpose of directing the discharged particulate material (14) onwards, is arranged between the discharging roller (22) and forming belt (16), wherein the directing apparatus (24) is designed in an adjustable manner so as to influence distribution accuracy and/or transverse distribution of the discharged particulate material (14) over a width (17) of the forming belt (16). The present invention also relates to a method for supplying particulate material (14) continuously to a circulating forming belt (16) and to an arrangement (10) for producing boards continuously.

Description

Spreader and method of continuous application

of grit on a form band

The present invention relates to a spreader and a method for the continuous application of grit on a rotating forming belt and an arrangement for the continuous production of material plates.

In the production of material plates from scatterable material, a mixture of particles or fibrous material (for example, wood chips or other lignocelluloses material) and a binder (for example, glue) to a

Spreading mat scattered on a forming or conveyor belt (Streubandförderer). This grit mat (also referred to as fleece or particle mat) is then fed to a possibly required pretreatment of a continuous or discontinuous pressing, which can be done by means of pressure and / or heat. For example, MDF (medium density fiberboard) or OSB (Oriented Strand Boards) can be produced in this manner.

In appropriate plants are mostly grit storage (also called

Streudosierbunker called) u.a. Intended for in-plant buffering and metering of material. The mixed with the binder scatterable

Material (grit) is filled into the grit storage, from which it is then discharged again and scattered by means of a scattering device on the forming belt. The grit storage on the one hand has the task to regulate the quantity of the feed of the grit to the spreader and on the other hand to even this. To discharge the grit from the grit storage usually one or more Austragungswalze is used, which should solve the material as evenly as possible and perform the scattering.

The actual scattering is usually carried out by means of a scattering head, through which the scattered material discharged by the discharge roller is further separated and scattered as uniformly as possible on the forming belt. Usually is between

Austragungswalze and scattering head or the discharge roller downstream of a guide device (may also be referred to as deflecting device) is arranged, the the discharged spreading material in the direction of the scattering head or directs in the direction of the forming belt.

For example, in DE 102 06 595 A1 a scattering station for the homogeneous spreading of glued spreading material, in particular wood chips, in the course of

Production of wood-based panels with a metering bunker for discharging the glued spreading material disclosed. The grit discharged from the dosing bunker falls onto an obliquely arranged distribution plate arranged underneath and then strikes a spreading roller arrangement in the area of application of a spreading head, which scatters the spreading material onto a forming belt.

In such systems, it may happen that due to manufacturing tolerances in the various plant components involved or effects such as thermal distortion, material fatigue, etc., the distribution of the scattered material on the forming belt is not uniform. Here, both constant and varying deviations from a uniform distribution both in the conveying direction of the forming belt and across are possible. Such inaccuracies or fluctuations cause less straightening inaccuracy and lead to the manufactured

Material plates after compression in their density have irregularities and thus may be reduced in stability. In addition, visual impairments may be due to recognizable on the surface of the plate

Differences in density result.

Object of the present invention is to ensure a uniform distribution of the material on the forming belt and so the quality of the produced

Improve material plates. In particular, it is intended to make it possible to compensate for constant errors in the scattering, which arise after a prolonged period of operation, for example due to material fatigue, etc. In particular, it should be possible after maintenance operations with simple means "quasi-stationary" scattering errors compensate to ensure optimized and predetermined scattering.

According to one aspect, the present invention relates to a solution for this task, a scattering device for the continuous application of grit on a

circulating forming belt, with: a Austragungswalze for discharging the grit from a grit storage; and

a guide device arranged to pass the discharged spreading material between the discharge roller and the forming belt,

wherein the guide device is adjustably designed to act on a straightening inaccuracy and / or a transverse distribution of the discharged grit over a width of the forming belt.

According to a further aspect, the invention relates to an arrangement for

continuous production of material plates, with:

a grit storage for storing a supply of grit;

a forming belt for feeding the spreading material to a compression; and a spreader as previously described.

According to a further aspect, the invention relates to a method for the continuous application of spreading material to a circulating forming belt, with the following steps:

Discharging the grit from a grit storage;

Forwarding the discharged grit by means of a guide device which is arranged between a Austragungswalze and the forming belt; and

Adjusting the guide device for acting on a stray inaccuracy and / or a transverse distribution of the discharged grit over a width of the forming belt.

Preferred embodiments of the invention are described in the dependent claims. It is understood that the scattering device, the arrangement and the method according to the embodiments described for the scattering device or for the arrangement in the dependent claims may be performed.

The scattering device according to the invention is suitable for use in

continuous application of spreading material to a circulating forming belt.

In particular, the scattering device according to the invention is integrated in an arrangement or in a system for the continuous production of material plates. From a grit storage, in which a stock of grit is stored, grit is discharged by means of a discharge roller. The discharged spreading material is then scattered onto a forming belt, by which it is fed to a compression.

According to the invention, a guide device is arranged downstream between the discharge roller and the forming belt or the discharge roller. The guide device is designed to act on a spreading inaccuracy and / or a transverse distribution of the discharged grit over the width of the forming belt. The spreading material discharged by the discharge roller impinges on the guide device for forwarding. The guide device serves to guide and guide the continuous material flow of the grit discharged by the discharge roller. in the

Contrary to previous approaches, the guide device according to the invention is designed so that not only a passive or constant guidance or forwarding of the grit takes place, but that its distribution can be changed during the transfer changed. The guide device is designed to be adjustable. By adjusting the guide can be acted on a Streiningauigkeit and / or transverse distribution of the discharged grit. The spreading inaccuracy and / or the transverse distribution can be influenced.

In this case, the distribution of the transverse distribution is understood to be, in particular, the distribution of the

Grit along a transverse axis orthogonal to the conveying direction of the forming belt. The lateral distribution describes the amount of material per section of the section

Forming belt. The amount of material per broad section of the forming belt corresponds to the amount of material per respective length of the guide device or is at least proportional to this in the case of an angled arrangement. It can therefore be turned off on the amount of the passing or forwarded by the guide grit per length and per unit time. In this case, both length section (or width section) and time unit can in principle be chosen arbitrarily small. By acting it is understood that this transverse distribution when hitting the grit on the guide device may be different than when leaving the guide or scattering device.

Alternatively or additionally, the straightening inaccuracy can be influenced. In particular, the amount of grit per gram is understood as the straightening inaccuracy

Surface section of the forming belt. A high straightening accuracy causes a balanced amount of spreading material per unit area of the forming belt. It is understood that there is a conceptual overlap between the transverse distribution and the straightening inaccuracy.

In comparison to previous scattering devices, the scattering device according to the invention allows to compensate for inaccuracies and in particular constant deviations from an intended uniform distribution of the discharged material over the width of the forming belt. Reasons for such inaccuracies or deviations can be, for example, manufacturing tolerances in the production of the Austragungswalze, their location, their drive and / or the other components of the Streugutspeichers or scattering head, etc. Other reasons may also arise from material fatigue phenomena or thermal effects during prolonged operation of a corresponding system. Due to the adjustability of

Leitvorrichtung these effects can be compensated both during commissioning of a system and during operation or after a longer period of operation of an existing system. Achieved by the invention

Uniformity of the amount of discharged material across the width of the forming belt is achieved so that the quality of the produced material plates is improved, in particular with regard to the stability as well as with respect to the optics.

In a preferred embodiment, the guide device comprises a substantially planar guide element with a smooth surface facing the discharge roller and a frame element for fastening the guide element; and the guide element is designed to guide the grit along the smooth surface in the direction of the forming belt. The spreading material discharged from the discharge roller strikes a surface of the guide member which is formed so that the discharged material can slide along it to be scattered on the forming belt. The guide element can be designed, for example, as a baffle. The guide element is held by a frame element. The frame member is used for attachment to the other components of the scattering device or arrangement and is firmly connected to the other components. Preferably, the guide element and the frame element with respect to each other are movable or flexible and thus allow a degree of freedom for influencing the grit flow along the surface of the guide element. Advantageous to the use of a guide element with a smooth surface are in particular the simple and efficient manufacturability and the resulting possibilities for acting on the transverse distribution of the discharged material.

In an advantageous embodiment, the guide device for adjusting a

Inclination of the guide element formed by a rotation of the guide element about an axis of rotation; and the axis of rotation preferably runs parallel to the discharge roller and / or parallel to a conveying direction of the forming belt. Under the inclination of the guide element, the inclination relative to the frame element of

Guide. The guide element can be rotated relative to the frame element about a rotation axis. This can affect its inclination. The change in the inclination of the baffle corresponds to a change in the angle at which the material discharged from the discharge roller impacts the baffle. The appearance or impact angle can be adjusted, which corresponds to a change in the braking force acting on the guide element upon impact of the grit. By changing the inclination results in a setting, with which the stray inaccuracy and / or lateral distribution of the grit can be influenced. In a further embodiment, the guide device for adjusting the inclination of the guide element, at least one connecting element for adjustably setting a distance between a first spaced from the axis of rotation

Connection point on the frame member and a second spaced from the axis of rotation connection point on the guide element. The connecting element connects a first connection point to the frame element and a second connection point to the guide element and allows a change or adjustment of the distance between the two points. Both connection points are arranged at a distance from the axis of rotation. By changing the distance between the two connection points, a rotation of the guide element relative to the frame element, ie a change in the inclination of the guide element, causes. The mechanically simple construction allows thereby acting on the

Cross distribution of the discharged grit.

In an advantageous embodiment, the guide device comprises a tilt reactor element for automatically adjusting the inclination of the guide element. The inclination can be changed automatically by a corresponding actuator. This Neigeaktorelement can be designed for example as a motor, in particular as a servomotor. By using a tilt reactor element, automated adjustability is achieved. This can be done efficiently on occurring

Inaccuracies in the transverse distribution by an adjustment of the inclination of the guide element, which can also be done during operation, are reacted. It is advantageous that there is no need for manual interaction.

In a preferred embodiment, the guide element is formed deformable;

the guide device comprises an actuating element for deforming the guide element by a force acting on the guide element in a control point actuating force; and the control point is preferably arranged in the surface of the guide element. Under a deformability of the guide element is understood that the surface of the guide element, which faces the impinging material is variable in shape. This change in the shape of the guide element can be achieved by an actuating element by which a force is exerted on the guide element in a control point. The control point is usually in the surface of the planar guide element. The deformation of the guide element serves to the transverse distribution of the discharged

Material to interact. Depending on the shape of the guide element or the smooth surface of the guide element, the flow of the grit discharged therefrom is changed. By a change in shape thus results in a adjustability for acting on the

Distribution.

In a further preferred embodiment, the guide device comprises a plurality of adjusting elements for deforming the guide element by adjusting forces exerted on the guide element in a plurality of setting points. By using a plurality of actuators is achieved that the shape of the guide element precisely to achieve a deterministic effect on the transverse distribution of

discharged material is achieved. By using multiple actuators, the effect to be achieved can be influenced accurately and finely granular. This results in a purposeful adjustment with respect to the transverse distribution of

discharged material.

In an advantageous embodiment, the plurality of control points lie in a line in the surface of the guide element, which is parallel to the Austragungswalze and / or parallel to a conveying direction of the forming belt runs; or in two parallel lines in the surface of the guide element, which run parallel to the discharge roller and / or parallel to a conveying direction of the press belt. This ensures that over the entire width of the flow of the discharged material along the longitudinal axis of the guide element adjustment is created. It can be acted on the material flow over the entire width of the material flow. Alternatively, it is possible that an arrangement of the control points is provided in two parallel lines. This results in a further increased accuracy with regard to the effects to be achieved on the transverse distribution and a better adjustability.

In one embodiment, the adjusting element is designed as a set screw, which with a set screw for exerting a force perpendicular to the surface of the

Leitelements cooperates; and / or includes the guide device

Stellaktorelement for automated exercise of the actuating force on the actuator. By the adjusting screw, a pressure is exerted on the surface of the guide element. The pressure causes the guide element or its surface facing the impinging material to be deformed. This results in an easily realizable and adjustable with high accuracy adjustment. Advantage of using a set screw is the ease of manufacture and ease of adjustment. It is understood that a plurality of adjusting elements can be configured as set screws. Automation can be achieved through the use of a Stellaktorelements for controllable power. The advantage of using a Stellaktorelements is that no manual interaction of a machine operator or the operator of the system is required.

In an advantageous embodiment, the guide device is designed to set a distance between the guide element and the discharge roller. By changing the distance between the guide element and the Austragungswalze results in a further adjustment with respect to the straightening inaccuracy and the transverse distribution of the discharged from the Austragungswalze material.

In a further embodiment, the guide element is formed substantially rectangular and aligned parallel to the Austragungswalze. Here is the

Dimensioning of the baffle usually chosen so that the longer side the rectangle substantially corresponds to the length of the Austragungswalze. The longitudinal axis of the guide is aligned parallel to the Austragungswalze.

In a preferred embodiment, the Austragungswalze is aligned orthogonal to a conveying direction of the forming belt. Typically, the discharge roller and conveying direction of the forming belt are arranged at a right angle to each other. In most cases, the axis of rotation of the guide element is aligned parallel thereto.

In an advantageous embodiment, the scattering device comprises a spreading head arranged between the guide device and the forming belt for separating and scattering the spreading material onto the forming belt. Through the scattering head is a

Equalization of the scattering on the forming belt.

In an advantageous embodiment, the arrangement further comprises a

A sensor device for determining a measured value, which represents the spreading inaccuracy and / or transverse distribution of the discharged grit over a width of the forming belt; and a display device for displaying the measured value or a control device for controlling the setting of the guide device based on the measured value. For example, a camera or other suitable device may be used as the sensor device. In particular, are suitable

Radiographic devices for determining the basis weight. The output of this sensor device can serve as input for a control device. By the control device, the setting of the guide is made automatically, so that there is a control loop. If it is determined on the basis of the measured value that there is a deviation from a uniform distribution in the discharged spreading material, this deviation is corrected by means of the inventively adjustable spreading device. As an alternative to a fully automated design of the control loop, it is also possible that the measured value to a machine operator or the

Operator of the system is displayed and that the actual setting of the spreader is then achieved by means of manual input or setting.

The method according to the invention for the continuous application of spreading material to a circulating forming belt can be used in particular as an operating method in a plant for the production of material plates are used, but also operated independently.

It is understood that the features mentioned above and those yet to be explained below can be used not only in the particular combination given, but also in other combinations or in isolation, without departing from the scope of the present invention.

In particular, a teaching of the invention that can be used by the discharge of the opposite sheet metal for reversing the direction of the scattering material in a simple and subtle way to redistribute the spreading material transverse to the Formbanderstreckung without interfering too much in the moving bulk material. It has surprisingly been found that by adjusting a bending line on the guide element, the spreading material distribution can be changed and adjusted. In addition to a convex or concave bending, three-dimensional bending shapes can be set on a relatively elastic baffle with simple means. In a complex embodiment, a kind of checkerboard pattern is particularly preferably provided at force introduction points in the guide plate, which can be acted upon manually or preferably automatically with positive or negative forces.

Thus, it is in a simple application to scattering errors during production, especially in connection with a scattering head downstream

Sensor device and operatively connected to the guide control or

Control device, now possible to respond to a changed scattering behavior of the arrangement, without directly in the course of a plant stop in a

Change maintenance scenario.

The invention will be described in more detail below with reference to some selected embodiments in conjunction with the accompanying drawings and explained. Show it:

Fig. 1 is a schematic side view of an arrangement for continuous

Production of material plates according to one aspect of the present invention in section; Fig. 2 is an enlarged schematic sectional view according to another

Aspect of the present invention;

Fig. 3 is a schematic plan view of a guide device for use in a scattering device according to another aspect of the present invention

Invention in section;

Fig. 4 is a further schematic representation of a guide device for

Use in a spreader according to one aspect of the present invention;

Fig. 5 is a schematic side view of an arrangement for continuous

Production of material plates according to another aspect of the present invention in section and

Fig. 6 is a further schematic representation of a guide device for

Use output side of a grit bunker according to an alternative aspect of the present invention.

1 shows an inventive arrangement 10 for the continuous production of material plates is shown in a schematic sectional view. The arrangement comprises a grit storage 12 for storing a supply of grit 14. The assembly 10 further comprises a forming belt 16 through which the grit 14 is fed to a crimping in a continuous or discontinuous press (not shown). Furthermore, the arrangement 10 comprises an optional

Spreader 18 for the continuous application of the grit 14 on the

Formband 16. It can be realized with the grit storage 12 and a direct scattering on the forming belt 16, wherein the indirect scattering with a matched to the grit 14 scattering head are preferred.

Such arrangements are used in plants for the production of material plates. In such installations, the stock filter 12 serves to buffer glued material, referred to herein as stock 14. The grit storage 12 may also be referred to as a dosing bunker or material bunker. The filling of the grit storage 12 is usually via a corresponding conveyor system from above (not shown). Within the grit storage 12, the grit 14 is conveyed in the illustrated exemplary embodiment by means of a conveyor 20 in the direction of a Austragungswalze 22. The Austragungswalze 22 causes a Separation and discharge of the material in the direction of a guide device 24 for forwarding the material in the direction of the forming belt 16.

Between the guide device 24 and the forming belt 16 can for further

Separation of the grit 14 a scattering head 26 may be provided. This scattering head 26 causes a further separation of the discharged grit 14 and a distribution along an axis which extends parallel to the conveying direction of the forming belt 16. The use of a scattering head 26 is required only in some applications.

As shown, the forming belt 16 extends under the scattering device 18 or a scattering head 26 in the direction shown and promotes the scattered spreading material 14 in the conveying direction 52 of a press (not shown).

The Austragungswalze 22 (also referred to as a knock-off roller) is formed along a central longitudinal axis 23 or rotation axis with a predetermined diameter and a length, wherein the length is usually the width of the on the

Forming strip to be applied grit mat 15 corresponds. Usually that is

Rotation axis of the discharge roller 22 aligned orthogonal to the conveying direction 52 of the forming belt 16. The discharge roller 22 rotates in the direction shown for knocking off the grit 14. For knocking or discharging and for the separation and material transport of the grit 14 are usually over the surface of the Austragungswalze 22 protruding extensions, due to the rotation of the Austragungswalze 22 continuously with the grit 14 in the

Grit storage 12 come into contact.

It is discharged continuously and over the entire length of the Austragungswalze 22 material. This can happen that at one point along the

Austragungswalze 22 due to their structure, due to a material defect such as a broken extension or due to thermal distortion or aging effects at a point constantly cut off too much or too little material and discharged. It is also possible that changes in the grit storage or in other components or other effects lead to uneven material removal by the discharge roller 22. Such uneven spreading material densities can in turn lead to an uneven distribution of material on the forming belt 16. Such irregularities can be maintained even after compression and optical

Impairment of the produced material plates and / or to

Stability limitations of the material plates especially in the areas with lower material density lead. An uneven distribution of the grit 14 on the forming belt 16 leads to a reduction in quality of the produced material plates. The present invention allows to counteract such uneven distribution.

The discharged from the Austragungswalze 22 grit 14 meets the

Guide device 24, which is designed to forward the discharged grit 14. According to the invention, the guiding device 24 is designed to be adjustable in order to improve the scattering insofar as it is suitable for acting on a transverse distribution of the discharged material and / or on a straightening accuracy adjustable. In the schematic representation shown, the transverse distribution means a distribution along an axis perpendicular to the plane of representation or parallel to the axis of rotation of the discharge roller 22. The term transverse distribution is therefore to be understood as a distribution across the width 17 of the forming belt 16. The transverse distribution refers to the amount of material per width section of the forming belt 16. The adjustable guide device 24 according to the invention allows uneven

Material amounts over the width of the guide 24 compensate and thus counteract an uneven distribution of the grit on the forming belt 16.

In the illustrated embodiment, the assembly 10 further includes a sensor device 28, which is configured as a camera to monitor the scattering on the forming belt 16. Based on the measured value of the sensor arrangement can then be determined by the guide device 24 influencing the transverse distribution can be determined. This adjustment of the guide 24 can be automated or manually made by operators. It is understood that other sensor principles can be used.

2 shows an embodiment of the scattering device 18 according to the invention is shown schematically in an enlarged sectional view. The scattering device 18 comprises a guide device 24, which in the illustrated embodiment comprises a substantially flat guide element 30 with a smooth surface 32. Along the smooth surface 32, the grit 14 can slide off and be forwarded in the direction of the forming belt. This smooth surface 32 faces the Austragungswalze 22 and the impinging grit 14. The guide element 30 may be formed in particular of sheet metal as a guide plate. This sheet has a surface 32 which has only a slight friction with respect to the spreading material 14, so that the spreading material 14 can slide off without residue and can be passed on. The smooth surface 32 of the guide element 30 preferably extends over the entire length of the discharge roller 22 or width 17 of the forming belt 16, so that the entire discharged material can slide on the smooth surface 32 and be deflected by this or influenced in its distribution.

The guide element 30 is connected via a frame member 34 with the system. The frame member 34 causes the position and orientation of the guide member 30 to be changed from the discharge roller 22. The frame member 34 is as a fixed connection for attachment of the guide device 24 to the other components of the scattering device and the arrangement for the production of

Material plates to understand.

In the illustrated embodiment, a support 36 of the guide element 30 is provided for stabilizing the guide element 30 and for connection to the frame member 34.

In the illustrated embodiment, as schematically indicated in the diagram, it is possible to reduce the inclination of the guide element 30 in relation to that

Frame element 34 to change. In this case, the angle at which the grit 14 discharged by the discharge roller 22 impinges on the smooth surface 32 of the guide element 30 changes. Such a change in the angle affects a Aufprallbzw. In particular, a relatively steep impact angle can cause a higher mixing of the discharged material in both the longitudinal and in the transverse direction (corresponds to an axis perpendicular to the plane of representation) is achieved. To change the inclination, the guide element 30 is rotatably connected to the frame element with respect to an axis of rotation. The axis of rotation is usually arranged parallel to the axis of rotation of the Austragungswalze 22, so that a uniform influence of the discharged material or the flow of material can be made over its entire width. In most cases, the axis of rotation is aligned parallel to the conveying direction of the forming belt. In particular, as shown in the

Embodiment indicated, the guide element in the axis of rotation 38 on

Be mounted frame member 34. It goes without saying, however, that others too

Constructions are conceivable in which a rotation about the axis of rotation can take place without the guide element 30 is mounted in the axis of rotation. In particular, corresponding linear drives are conceivable that rotate the guide element 30 about an axis.

In the illustrated embodiment, the inclination of the guide element 30 is changed and adjusted by means of a connecting element 40, which connects a first connection point 42 on the frame element 34 to a second connection point 44 on the guide element 30 or on the holder 36. Preferably, both connection points 42, 44 are arranged in a plane perpendicular to the axis of rotation 38. The connecting element 40 is designed to make a distance between the first connection point 42 and the second connection point 44 variable. By changing this distance, a rotation of the guide element 30 about the axis of rotation 38 and thus a change in the inclination of the guide element 30 is effected. The change in the distance can be done for example by means of a rotary thread and a screw engaging therein. It is also possible that a rigid connecting element 40 in one of the two connection points 42, 44 can be fixed by a clamping device, for example by means of a clamping screw. Other options for determining the distance between the two connection points 42, 44 are conceivable.

It is possible that the adjustment of the inclination of the guide element 30 by means of a corresponding tilting reactor element 46 takes place. This tilt reactor element 46 can act, for example, as a rotary motor or preferably as a servomotor in the region of the mounting of the guide element 30 on the frame element 34, ie directly on the axis of rotation 38. The tilt reactor element 46 allows the tilt adjustment to be automated. It is understood that other positions of the tilt reactor element 46, for example, on the connecting element 40 or in the form of an embodiment of the connecting element as a hydraulic cylinder, are conceivable.

Another possibility for acting on the transverse distribution of the grit is a change in the distance between the guide 24 and the

Austragungswalze 22. In the illustrated embodiment, the change in the distance by a rail-like mounting of the guide element 30 on

Frame element 34 can be achieved, resulting in a shift of the

Guide element 30 parallel to the conveying direction 52 of the forming belt 16 and perpendicular to the Austragungswalze 22 results, as indicated schematically by the arrow. A change in the distance between the guide device 24 and the discharge roller 22 also causes a change in the impact angle of the impinging grit on the surface 32 of the guide element 30, whereby, as described above, it can be achieved that the distribution of the incident material parts in all directions is made uniform. It is understood that other mechanisms and

Directions for changing the distance in question.

FIG. 3 shows a schematic sectional illustration of the guide device 24 in the region of the guide element 30 in plan view. In order to better illustrate the arrangement in relation to the forming belt 16 and its width 17 transversely to the production direction 52, this is shown "behind" the guide 24, even if according to the embodiment between the guide 24 and the forming belt 16 still a scattering head 26 can be arranged. In particular, deformability of the guide element 30 embodied as a guide plate is illustrated .. Deformation can take place by means of a plurality of setting elements 48. A setting force is exerted on the guide element 30 by the setting elements in a plurality of setting points 50. In the example shown, the actuating force acts perpendicular to the surface The guide element 30 deforms or bends due to the acting actuating forces, thereby achieving that the surface 32 of the guide element 30, which faces the impinging, discharged spreading material, can be deformed.

It is understood that the illustration of FIG. 3 shows for clarity a pronounced deformation of the guide element 30, whereas real deformations take place to a much lesser extent. Due to the deformation of the surface 32 can be acted on the transverse distribution of the forwarded grit. If, for example, an increased material density is present in a region of the forming belt 16, this can be influenced or corrected by a deformation of the corresponding location of the surface 32 of the guide element 30.

The adjusting elements 48 are arranged in the illustrated embodiment in a line or row parallel to the axis of rotation of the Austragungswalze or transversely to the conveying direction of the forming belt. The adjusting elements 48 are preferably designed as adjusting screws, which engage in corresponding threads, so that the adjusting force can be exerted on the guide element 30 by a rotation. In the illustrated

Embodiment are the corresponding threads in the holder 36th

intended.

For exercising the actuating force nine control elements are shown in the example shown, which are arranged in a row. It is understood that other arrangements and numbers are possible. The arrangement of the adjusting elements with respect to the surface of the guide element 30 is variable. Also variable are the control elements with respect to the type of force. For example, the adjusting elements 48 can be fixed by means of a clamping device in a specific deflection position.

Also, the force can be exercised via adjusting thread in the frame member. Further constructive realizations are conceivable. It is also possible that the actuating force is exerted by means of an automated Stellaktorelements that allows an automated deformation of the guide element 30.

FIG. 4 shows a schematic plan view of the guide device 24 in the region of the guide element 30. In dashed line is the position of the

Guiding element 30 indicated that in the selected representation before

Presentation level is located. On the guide element 30, a force is exerted by means of the adjusting elements 48. In the illustrated embodiment are eighteen actuators 48 and control points in two parallel lines, each with nine

Control points arranged in the surface of the guide element 30. The two lines are also parallel to the Austragungswalze and parallel to a

Conveying direction of the forming belt (see Fig. 1 and 2). By using two parallel lines, an increased and accurate adjustability with respect to the impact is achieved reached on the transverse distribution of the grit. It is understood that other numbers and arrangements are possible.

Figure 5 now shows an extended application of the invention, in which the

Guide device 24 is suitable by the adjustment of the guide element the

Change task point or transfer area of the material to be scattered 14 in a scattering head 26. As known from the previous figures, the Austragungswalze 22 carries the grit 14 from the grit storage 12 such that it impinges at a predetermined speed on the baffle respectively the guide element 30 of the guide 24 and is deflected there. If now the guide element 30 is moved from a first position (solid line) to a second position (dashed line), the entry region of the scattering material 14 on the scattering head 26 changes. The scattering head itself is not labeled any further and can be of a very different design. In the present example is found in the direction of the scattered material 14 am

Transfer area a Klassiervorrichtung, which is designed such that the

Rotation direction of the classifying rollers can be switched.

If, for example, the spreading material 14 is transferred to the spreading head 26 in the first position, the material is fed into the left region in the case of a levorotatory classifying device and sprinkled with the left-hand group of rolls. If the direction of rotation of the classifier reversed, the material is transported from the left feed point to the right, the smaller material immediately falls through and the larger material is applied to the right group of rollers and sprinkled onto the forming belt. If the position of the guide element 30 in the second position is changed, the material is rapidly transferred to the right-hand group of rollers for scattering on the forming belt 16. If an alternative scattering desired, by reversing the direction of rotation of the upper roller group in the scattering head again the entire scattering behavior of the scattering head can be changed and adjusted. Thus, it is also possible according to the invention to vary the task range of the material to be spread on the scattering head and to significantly change its scattering behavior.

In Figure 6, an alternative grit storage 12 is shown with a plurality of discharge rollers 22, the plurality of outlet openings formed therebetween, the grit 14 for reversing direction against the surface 32 of a guide element 30 of Promote guide device 24. It is also shown here that by means of not shown in detail automatic or mechanical actuating means, the guide element 30 is variable in its position or shape. Here, too, 50 control elements 48 engage at control points, which can bend the surface 32 or the guide element or change its position. In the case of such a large-area guide element 30, a kind of checkerboard pattern is preferably arranged on actuators or adjustment points 50 in order to be able to set any necessary bending / position of the guide element 30.

The invention has been fully described and explained with reference to the drawings and the description. The description and explanation are to be considered as illustrative and not restrictive. The invention is not disclosed on the

Limited embodiments. Other embodiments or variations will become apparent to those skilled in the art using the present invention, as well as a detailed analysis of the drawings, the disclosure, and the following

Claims. In particular, the possibilities of moving parts are shown with double arrows, without explaining in detail the corresponding artisanal embodiments of the drive technology.

In the claims, the words "comprise" and "with" do not include that

Presence of other elements or steps. The undefined article "a" or "an" does not exclude the presence of a plurality. A single element or unit may perform the functions of several of the units recited in the claims. The mere mention of some measures in several different dependent claims is not to be understood that a combination of these measures can not be used equally advantageous. Reference signs in the claims are not intended to be limiting. List of Reference P1518

10 arrangement

12 grit storage

14 spreading material

15 spreading material mat

16 form band

17 width

18 spreading device

20 conveyor system

22 discharge roller

23 longitudinal axis

24 guide device

26 scattered head

28 sensor device

30 guide element

32 surface

34 frame element

36 bracket

38 axis of rotation

40 connecting element

42 First connection point

44 Second connection point

46 Neigeaktorelement

48 control element

50 point

52 conveying direction of 16 State of the art: DE 102 06 595 A1

Claims

Patent claims

1. Spreading device for the continuous application of grit on a

all-round forming band, with:

a discharge roller (22) for discharging the grit (14) from a grit storage (12); and

a guide device (24) which is arranged to forward the discharged grit (14) between the discharge roller (22) and the forming belt (16),

wherein the guide device (24) is adjustable to act on a

Spreading accuracy and / or a transverse distribution of the discharged grit (14) over a width (17) of the forming belt (16) is formed.

2. Spreading device according to claim 1,

wherein the guide device (24) comprises a substantially flat guide element (30) with a smooth surface (32) facing the discharge roller (22) and a frame element (34) for fastening the guide element (30); and

wherein the guide element (30) is designed to guide the grit (14) along the smooth surface (32) in the direction of the forming belt (16).

3. Spreading device according to claim 2,

wherein the guide device (24) is used to adjust an inclination of the

Guide element (30) by rotating the guide element (30) by one

Axis of rotation (38) is formed; and

wherein the axis of rotation (38) preferably runs parallel to the discharge roller (22) and/or parallel to a conveying direction (52) of the forming belt (16).

4. Spreading device according to claim 3, wherein the guide device (24) for adjusting the inclination of the guide element (30) has at least one connecting element (40) for adjustably determining a distance between a first connection point (42) spaced from the axis of rotation (38).

Frame element (34) and a second connection point (44) on the guide element (30) spaced from the axis of rotation (38).

5. Spreading device according to claim 3, wherein the guide device (24).

Tilt actuator element (46) for automatically adjusting the inclination of the guide element (30).

6. Spreading device according to claim 2,

wherein the guide element (30) is designed to be deformable;

wherein the guide device (24) has an adjusting element (48) for deforming the

Guide element comprises an actuating force exerted on the guide element (30) at a control point (50); and

wherein the setting point (50) is preferably arranged in the surface of the guide element (30).

7. Spreading device according to claim 6, wherein the guide device (24) comprises a plurality of adjusting elements (48) for deforming the guide element (30) by adjusting forces exerted on the guide element (30) in a plurality of adjusting points (50).

8. Spreading device according to claim 7, wherein the plurality of control points (50) lie in a line in the surface of the guide element (30) which is parallel to the discharge roller (22) and / or parallel to a conveying direction (52) of the forming belt (16 ) runs; or

lies in two parallel lines in the surface of the guide element (30), which run parallel to the discharge roller (22) and / or parallel to a conveying direction (52) of the press belt (16).

9. Spreading device according to one of claims 6 to 8,

wherein the adjusting element (48) is designed as an adjusting screw which has an adjusting thread for exerting an adjusting force perpendicular to the surface of the

Guide element (30) interacts; and or

wherein the guide device (24) comprises an actuator element for automatically exerting the actuating force on the actuating element (48).

10. Spreading device according to one of claims 2 to 9, wherein the guide device (24) for adjusting a distance between the

Guide element (30) and the discharge roller (22) is formed.

1 1 . Spreading device according to one of claims 2 to 10, wherein the guide element (30) is essentially rectangular and parallel to the

Discharge roller (22) is aligned.

12. Spreading device according to one of claims 1 to 1 1, wherein the

Discharge roller (22) is aligned orthogonally to a conveying direction of the forming belt (16).

13. Spreading device according to one of claims 1 to 12, further comprising a spreading head (26) arranged between the guide device (24) and the forming belt (16) for separating and scattering the grit (14) onto the forming belt.

14. Spreading device according to claim 13, wherein the guide device (24) is suitable for feeding the spreading material (14) to the spreading head (26) at different points.

15. Arrangement for the continuous production of material panels, with:

a grit storage (12) for storing a supply of grit (14); a forming belt (16) to feed the grit for compression; and a spreading device (18) according to one of claims 1 to 14.

16. Arrangement according to claim 15, further comprising

a sensor device (30) for determining a measured value that

Represents scattering accuracy and/or transverse distribution of the discharged grit (14) over a width (17) of the forming belt (16); and

a display device for displaying the measured value or one

Control device for controlling the setting of the guide device (24) based on the measured value. Method for the continuous application of grit to a rotating forming belt, with the steps:

Discharging the grit (14) from a grit storage (12);

Forwarding the discharged grit (14) by means of a guide device (24) which is arranged between a discharge roller (22) and the forming belt (16); and

Adjusting the guide device (24) to influence a spreading accuracy and/or a transverse distribution of the discharged spreading material (14) over a width (17) of the forming belt (16).