EP2922670A1

EP2922670A1 - Fall duct arrangement with a dual cleaning device, in particular for a device for gluing particles in the course of producing material boards

Info

Publication number: EP2922670A1
Application number: EP13796037.3A
Authority: EP
Inventors: Detlef Kroll; Reinhard Schwinn; Gernot Von Haas
Original assignee: Dieffenbacher GmbH Maschinen und Anlagenbau
Current assignee: Dieffenbacher GmbH Maschinen und Anlagenbau
Priority date: 2012-11-22
Filing date: 2013-11-22
Publication date: 2015-09-30
Anticipated expiration: 2033-11-22
Also published as: CN203901478U; CN104812540A; CN104812540B; DE202012104538U1; WO2014079988A1; EP2922670B1

Abstract

A fall duct arrangement (20), in particular for a device for gluing particles which consist at least partly of fibers and/or chips suitable for producing material boards, has a fall duct (21), which has an inlet for supplying the particles and an outlet for discharging the particles, and a scraper (27), which is arranged so as to move relative to an inner wall (21a) of the fall duct (21) in order to clean the inner wall (21a). The fall duct arrangement (20) further has at least one flexible stripping element (22) for cleaning the at least one scraper (27), said flexible stripping element (22) being stretched over the inner wall (21a) in the travel path of the at least one scraper (27). In addition, driving means are provided which are designed to move the flexible scraping element in a direction of the longitudinal extension of the flexible stripping element (22). 1469

Description

FALL SHAFT ASSEMBLY WITH DOUBLE CLEANING DEVICE, ESPECIALLY FOR A DEVICE FOR BOXING PARTICLES IN THE MANUFACTURE OF MATERIAL PLATES

The present invention relates to a chute arrangement according to the preamble of claim 1.

The production of material plates from, for example, chips or medium-density fibers or other free-flowing materials are now automated processes and have already been used in many countries for many years. As you know, the

Compression of processed chips or fibers either clocked or continuous instead. In addition to the many plant components before and after the press, the production of a spreading material mat by means of spreading machines plays an outstanding role, since the quality of the produced spreading material mat is an important factor in addition to the quality of the raw materials. The urge to produce cost-effective material plates from natural raw materials and artificially produced binders forces producers to develop more and more efficient processes. Special emphasis is on low downtime and low wear.

The present development relates to the field of gluing the particles with a binder. Basically, the term binder is understood to mean a so-called adhesive liquor which consists of an adhesive in its main component. Depending on requirements, in addition emulsion, hardener, formaldehyde scavengers, dyes, insect repellent and antifungal agents and other additives are added. It is also common to use the adhesive without additives. The following are suitable as binders without any claim to completeness: isocyanates, MDI, melamine urea formaldehyde (MUF), urea formaldehyde (UF), MUPF or PF.

The gluing is typically carried out such that the grit or the particles are introduced by means of a metering device in a chute and by means of nozzles which are arranged in the chute or this upstream, is acted upon or become the binder. The glued spreading material is usually in a downstream of the chute drum with rotating conveyor tools

treated (mechanical mixer) and / or glued on and then sprinkled to a grit mat and then promptly before curing a glue, pressed. Alternatively, the spreading material can be added without a mechanical mixer

run through, be placed directly in a spreader to scatter the grit mat, and then to press. Such a device is known for example from the document DE 10 2010 064 339 A1.

Here, there is the problem that binders and particles glued to the binder may accumulate on the inner wall of the chute so that the chute tends to become soiled. This makes it necessary to clean the chute regularly. For this, the plant usually has to be shut down, which brings with it a corresponding loss of production.

In addition, there is the possibility that solid deposits of not negligible size may form on the inner wall of the chute over time.

If such deposits dissolve and fall into the mixer, it is not ensured that such lumps of solid deposits in the mixer are crushed and dissolved. It may therefore be in the paste of glued particles leaving the mixer, further solid lumps, which in the further course of the production of material plates can lead to impairment of product quality and / or damage to the presses.

In order to prevent or reduce the soiling of the inner walls of a chute and the formation of solid deposits on these is

Document WO 201 1/134844 A1 proposed to cover the inner walls of the chute with doctor blades or spatulas. The spatulas are firmly attached to a support structure consisting of an upper ring and a lower ring. The upper ring is connected to a toothed ring with internal teeth, which is driven by a pinion and a motor. Such driven strip

Scraper blades in a rotational movement about a vertical axis on the inner wall of the rotationally symmetrical chute.

Although it can be prevented in this way on the inner wall of the

Falling chute form larger deposits, but at the price that with the Scraper blades new elements and surfaces are introduced into the chute, which in turn pollute and on which solid deposits can form. So it can happen, especially in large plants, that on the

Schaberklingen can form caking, which weigh up to 50 kg and can fall off in a lump, causing damage to the mixer and / or the

can lead to subsequent machines.

It is therefore proposed in document WO 201 1/134844 A1 to cool the doctor blades to a temperature which is below the condensation point of the air humidity, so that a condensate film is formed on the surfaces which determines the adhesiveness of the injected chemical components, in particular of thermal should reduce binding adhesives.

Depending on the requirements of a particular application, in particular depending on which binder and / or which additives are used, it may be undesirable that condenses moisture in the chute. In this case, the doctor blade cooling proposed by the document WO 201/134844 A1 can not be effectively used. In other cases, depending on the binder used and / or the additives used, the effect of a condensate film is not or only slightly, so that adhesion is only slightly reduced, or even reversed, if certain binders or additives in moisture and / or at reduced temperatures show an increased tendency to stick and / or clump together. Even in these cases, use of the doctor blade cooling proposed by the document WO 201/134844 A1 may not be indicated.

Moreover, in order to realize the scraper blade cooling proposed by the document WO 201/134844 A1, it is necessary to provide corresponding supply lines and outlets for a cooling fluid which have a sufficient delivery capacity. Around the walls of a rotating chute and / or rotating

To supply doctor blades with the cooling fluid, it is also necessary that appropriate fluid-conducting coupling means are provided, which is a transfer of cooling fluid from a stationary part of the system to the rotating chute walls and / or the rotating doctor blades allow. The mechanical structures required for this can be a great effort and it may be difficult to achieve a permanently effective seal. It is therefore an object of the present invention to provide a chute assembly which can effectively prevent the formation of solid buildup within a chute.

It is therefore an object of the present invention to provide a chute assembly which is applicable to chutes of various shapes.

Further, it is an object of the present invention to provide a chute assembly that can be easily integrated into already built facilities. These and other objects of the invention are achieved by a chute assembly according to claim 1. Further preferred embodiments are set forth in the dependent claims.

As a solution, a chute arrangement is specified, in particular for a device for gluing particles, which consist at least partially of suitable for the production of material plates fibers and / or chips, wherein the

Chute assembly having a chute having an inlet for feeding the particles and an outlet for discharging the particles, and a spatula arranged to move relative to an inner wall of the chute to clean the inner wall. The chute arrangement further has at least one flexible stripping element for cleaning the at least one spatula, wherein the flexible stripping element is stretched in the travel path of the at least one spatula over the inner wall; and driving means are further provided which are adapted to set the flexible stripping element in a movement in a direction of the longitudinal extent of the flexible stripping element.

While the scraper allows to keep the inside wall of the chute clean, the flexible scraper allows the scraper to be cleaned. By the flexible stripping element is set in motion, the flexible Stripping element sections are moved out of the interior of the chute, so that the previously located inside the chute section of the flexible stripping element is accessible for cleaning. It can thus be effectively ensured that no solid deposits form in the chute.

The at least one flexible stripping element can be designed as an endless stripping element.

The at least one endless stripping element can preferably be arranged by means of deflecting means so that it encloses a wall element of the chute, which the

Inner wall has.

The at least one endless stripping element can furthermore preferably be arranged such that it is arranged running in the region of the inner wall within the chute.

The chute may in particular further comprise two winding devices, wherein the flexible stripping element is connected to the winding devices in order to be wound and unwound by the winding devices can.

The drive means may preferably be arranged to offset the at least one flexible stripping element into a circumferential movement and / or a reciprocating movement in the direction of the longitudinal extent of the stripping element. The at least one flexible stripping element may be arranged adjacent to the inner wall of the chute in a substantially vertical direction and / or arranged to extend in a corresponding manner to a shape of the chute in the vertical direction.

Preferably, further clamping means are provided which are adapted to keep the at least one flexible stripping element under tension.

Preferably, a cleaning device may further be provided, which is arranged such that the at least one stripping element is guided past the cleaning device or running through the cleaning device. The cleaning device can be embodied as a fluid bath, a brush, a wiper edge, or a stripping cylinder.

The spatula may be formed as a scraper, as a spatula blade, as a spatula, or as a rod.

The at least one flexible stripping element can be designed as a rope, in particular a wire rope, as a wire, as a band or as a chain. Preferably, the chute is tapered in the direction of the particle from top to bottom in cross section.

The chute can be cylindrical or conical. The chute can have a substantially concave shape.

The at least one inner wall, preferably all inner walls of the chute can be stripped at least once in two minutes, in particular once a minute.

Preferably, a tempering device may be provided for tempering the inner wall to a temperature which is below a threshold for curing of the binder, preferably below 70 ° C. As a further solution, a device for gluing of particles, at least partially for the production consist of material plates suitable fibers and / or chips, wherein the device comprises a chute assembly.

The apparatus may further comprise a supply means for feeding the particles and a plurality of nozzles for discharging a binder, wherein the nozzles in an area within the chute and / or above an inlet opening of the

Falling shaft. More preferably, the device has a mixing device downstream of the chute arrangement.

Embodiments of the invention are illustrated below with reference to the drawings:

Fig. 1 shows schematically a device for the gluing of particles;

Fig. 2A is a schematic plan view showing a chute assembly according to a first embodiment of the present invention;

Fig. 2B is a schematic plan view of the chute assembly of Fig. 2A; 3A to 3D show a schematic cross-sectional view of the stripping of a

Spatula through a flexible scraper during movement of the

spatula;

Fig. 4 shows a schematic side cross-sectional view of a

Chute arrangement according to a second embodiment of the present invention;

Fig. 5 shows in a schematic lateral cross-sectional view of a

Chute arrangement according to a third embodiment of the present invention;

Fig. 6 shows a schematic side cross-sectional view of a

Chute arrangement according to a fourth embodiment of the present invention;

Fig. 7A shows a schematic side cross-sectional view of a

Chute arrangement according to a fifth embodiment of the present invention; and

FIG. 7B illustrates a schematic plan view of the chute assembly of FIG. 7A. FIG.

FIG. 1 shows, in a schematic view, a device for the gluing of particles beginning with the metering device 2 and ending with a mixing device 7 in a general view. In between, a chute 3 and a chute arrangement 10 to be described in more detail below are arranged. The particles are thereby introduced as a particle stream into the metering device 2, usually from a particle bunker by means of discharge devices, weighed there and introduced into the chute 3 for metering via a standard belt control (not shown). There, the particle stream or the particles 1 impinges on an optional dissolving device 4 and is there dissolved to a particle curtain 5 and / or divided.

The optional opening device 4 may in particular have rake and / or baffle plates, spoke rollers and / or opening rollers, preferably designed as spiked rollers. The resolving device 4 is therefore optional because under certain circumstances, i.d.R. Depending on the nature of the particles 1, already the metering device 2 can generate a sufficiently useful particle curtain 5. The particle curtain 5 or the particles 1 are then sprayed by means of suitable nozzles 6 with a binder and glued.

In the further course of the particle curtain 5 falls through the chute assembly 10 and then passes into the chute assembly 10 downstream mixing device 7, in which mixed mechanically by means of a rotating shaft 9 by mixing tools 8 the glued particles and finally spend as a mixed particle flow (discharge arrow) , Again, depending on the

Process steps may be omitted on the mixing device 7. The glued particle stream is then stored in a dosing hopper or directly into a spreader to form a grit mat, which can be pressed in a further press in a press to a material plate and / or cured, introduced. In principle, the chute arrangement 10 should have a sufficient drop height so that the binder can bond sufficiently strongly with the particles and should preferably be formed at least half as long as the chute 3 in the direction of fall. As shown in Figure 1, the chute 3 and the chute assembly 10 may be provided as separate devices. Alternatively, it is also possible that the chute 3 forms a unit with a chute of the chute assembly 10. Various embodiments of a chute assembly (20, 40, 50, 60, 70) will now be described with reference to FIGS. 2A to 7B

Falling shaft assembly 10 in the apparatus of Figure 1 is usable. A first embodiment of a chute assembly 20 is shown in FIGS. 2A and 2B.

Figures 2A and 2B illustrate a chute assembly 20 with a chute 21. As shown in Figures 2A and 2B, in this embodiment, the chute 21 may be rotationally symmetrical, in particular conically configured, with a wall defining an inner wall 21 a.

The chute assembly 20 has a spatula 27 which is arranged so that it can move relative to the inner wall 21 a of the chute 20. For example, the spatula 27 may be disposed on a support ring device 28, which is preferably arranged at an upper end of the chute 21, ie inlet side. The

Tragringanordnung 28 may be configured to be rotatable, or may for example be arranged rotatably supported with bearing means 29, so that by means of a drive device, not shown, the spatula 27 in a rotational movement about a

Rotation axis of the chute 21 can be offset. The spatula 27 can be set in motion to strip over the inner wall 21 a, so that on the inner wall 21 a adhering particles 1, gluing agents and / or other buildup and / or dirt are stripped by the spatula 27 and so

Inner wall 21 a is cleaned.

By stripping the adhesions and / or dirt from the inner wall 21 a of the chute 21, it happens that these partially adhere to the spatula 27 and this fouling, especially on a the inside of the

Chutes 21 facing surface. It is therefore further provided a flexible scraper 22, which is stretched in the travel of the spatula 27 on the inner wall 21 a of the chute 21 extending, so that when the spatula 27 in his

Movement passes the location of the flexible wiper 22, the spatula 27 moves between the inner wall 21 a and the flexible stripping element 27. The flexible stripping element 22 may preferably be formed as a rope, in particular wire rope, as a wire, as a band or as a chain.

In order to keep the flexible stripping element 22 taut, clamping devices may also be provided which are shown by way of example in FIG. 2A as a spring 24 and a pressure roller 25 in order to tension the flexible stripping element 22.

The flexible wiper element 22 can thus strip over the inner wall 21 a side facing away, or the interior of the chute 21 facing side of the spatula 27, so that the spatula 27 is stripped and cleaned by the flexible wiper 22. This is shown in Figures 3A to 3D, which in a

show a schematic cross-sectional view different consecutive positions of the spatula 27 during the movement for stripping the inner wall 21 a of the chute 21, and show how the spatula 27 moves past the flexible stripping element 22 and thereby stripped by the flexible stripping element 22.

By the flexible wiper 22, therefore, the effect can be achieved, that also the spatula 27 can be cleaned of dirt and / or debris and kept free. As further illustrated in FIGS. 2A and 2B, the flexible stripping element 22 can be designed endlessly and can, via deflection means 23, such as for example

Deflection rollers, be guided and held so that it surrounds the wall of the chute 21, so that the endless flexible stripping element 22 both in the chute 21 adjacent to the inner wall 21 a, as well as outside of the chute 21 extends.

The deflection roller 23 may be associated with a drive (not shown) in order to set the endless flexible stripping element 22 in the direction of extension in the longitudinal direction of the flexible stripping element 22 in motion via the deflection roller 23. The

Movement may be an intermittent or continuous circumferential movement of the endless flexible stripping element 22, or an oscillating back and forth motion

Be movement of the endless flexible stripping element 22, or a combination thereof. The flexible stripping element 22 can thus be moved out of the region of the interior of the chute 21 in sections, so that the flexible stripping element 22 can be cleaned in sections in order to adhesion and / or contamination by particles 1 or binder, which is due to the stripping of the spatula 27 the flexible stripping 22 have deposited, and remove the flexible

To clean stripping 22.

The cleaning of the flexible stripping element 22 can be done manually. Preferably, however, the chute arrangement 20 has a cleaning device 26 for cleaning the flexible stripping element 22. The cleaning device 26 may in particular be arranged such that the flexible stripping element 22 extends past it or through the cleaning device 26.

The cleaning device 26 may be formed, for example, as a brush, doctor blade, or as a scraping edge, where the flexible stripping element 26 is moved past, or as a stripping gap or as a stripping cylinder, through which the flexible

Wiper 26 passes therethrough. The cleaning device 26 may also be configured as a fluid bath, for example, with water and / or a

Cleaning agent is filled and through which the flexible stripping element 26 is guided to wash off gluing agent or particles 1 of this and solve. The adhering to the flexible scraper 22 deposits and / or contamination can be removed so definitively from the area of the interior of the chute 21 and do not get into the further process chain. While in the first embodiment the chute 21 is shown as a cylindrical or conical chute 21 (see Figures 2A and 2B), this is not

restricting, and other forms can be used.

For example, Figure 4 shows a chute assembly 40 according to a second embodiment, wherein the chute 41 has a wall which is arcuately curved, so that the chute 41 tapers in the direction of the particle 1 from top to bottom. Correspondingly, a spatula 47 is provided, which is also configured corresponding arcuately curved to correspond to the arcuate curvature of the inner wall 41. Incidentally, the chute assembly 40 substantially the same elements as the chute assembly 20 of the first embodiment, the description of which is made to the above embodiments.

Due to the curved or concave shape of the chute 41 pointing towards the interior of the chute 41, in which the wall may be cambered in particular, there is the advantageous effect that the flexible stripping element 22 provides a particularly good support against the inner wall 41a of the chute 41 comes to rest and due to its flexibility, the shape of the inner wall 41 a adapts. This effect is further enhanced by additional clamping means such as the spring 24 and the pressure roller 25. This can be a particularly safe

Cleaning the spatula 27 can be achieved.

A chute arrangement 50 according to a third embodiment is shown in FIG. The chute assembly 50 according to the third embodiment

differs from the chute assembly 20 according to the first embodiment in that the endless flexible stripping element 52 is guided by a guide roller 53 so that the endless flexible stripping element 52 extends substantially completely within the chute 51, so that the leading and the returning section of flexible stripping element 52 are both stretched over the inner wall 51 a of the chute 51. Such a guide of the flexible stripping element 52 has the advantageous effect of a smaller space requirement, since no clearance for the outside of the chute 51 extending portion of the flexible stripping element 52 is required. In addition, the spatula 27 by the double-going flexible

Stripping element 52 correspondingly double-coated, resulting in a better

Cleaning performance leads. FIG. 5 also shows a cleaning device 56 in the form of a scraping edge for stripping off the flexible stripping element 52.

FIG. 6 shows a further variant of a chute arrangement 60 according to a fourth embodiment. In this embodiment, the flexible Abstreiflement 62 may be formed as a stripping element of finite length, which on two

Winding devices 63 is attached, which can wind up and unwind the flexible stripping element 62. By appropriate control of a drive (not shown) of the winding means 63, the flexible stripping element 62 can be displaced in a reciprocating motion in the longitudinal direction. The cleaning device 66 is in the example 6 executed as a wiping edge on which the flexible stripping element 62 is guided past, in order to strip this.

A chute assembly 70 according to a sixth embodiment is shown in FIGS. 7A and 7B. As shown in Figures 7A and 7B, the spatula 27 is not attached to a support ring. Instead, two support rods 73 are provided to which the spatula 27 is attached. The support rods 73 are guided through respective openings 72 in the chute 71 and can be so bent and / or designed so resilient that the support rods 71 press the spatula against the inner wall 71 a of the chute 71. By the support rods 73 are moved back or forth, as shown by the arrows in Figures 7A and 7B, the spatula 27 can be moved relative to the inner wall 71 a of the chute 71 to strip the inner wall 71 a and clean.

While the invention has been described above by way of example of preferred embodiments, these are not limiting. Thus, various aspects of the various embodiments may be combined or interchanged.

While in the foregoing examples have been given in which the spatula 27, 47 is moved relative to an inner wall 21 a, 41 a of the chute 21, 41, this is not limiting, and it is also possible, the chute 21, 41 itself by suitable Drive means to move. For example, the chute 21, 41

be configured rotationally symmetrical and are offset by appropriate drive means in a rotational movement, so that the inner wall 21 a, 41 a of the

Chute 21, 41 with respect to the spatula 27, 47 moves. The spatula 27, 47 can be held stationary by appropriate means, while the inner wall 21 a, 41 a of the spatula 27, 47 moves past. It is also possible to combine a movable spatula 27, 47 with a movable chute 21, 41. It is also possible to move the spatula 27, 47 in different ways. Thus, the spatula 27, 47 as described above in one direction of rotation continuously rotating. However, this is not limiting, and the spatula 27, 47 may also be moved intermittently, and / or may be in one

Forward / backward movement are offset. Moreover, the present invention is not limited to a single putty 27, 47, and several putties 27, 47 may be used, which are preferably arranged regularly spaced.

Further, the chute assembly 10, 20, 40, 50, 60, 70 have a tempering for tempering one or more inner walls 21 a, 41 a, 51 a, 71 a to a temperature which is below a threshold for the curing of the binder, preferably below 70 ° C.

While in the foregoing case there are described chutes 21, 41, 71 which are made substantially in one piece, this too is not restrictive, and the present invention is also applicable to chute arrangements having chutes made up of a plurality of elements, such that, for example, a plurality of elements each form an inner wall of the chute. (1469)

List of Reference Numerals: P1469

1 particle 25 40 drop shaft arrangement

2 dosing device 41 chute

3 chute 41 a inner wall

4 dissolver 47 spatula

5 particle curtain

6 nozzle 30 50 chute arrangement

7 mixing device 51 chute

8 mixing tools 51 a Inner wall

9 shaft 52 stripping element

10 Falling shaft arrangement 53 deflection roller

35 56 Cleaning device

20 drop shaft arrangement

21 chute 60 chute arrangement

21 a inner wall 62 stripping element

22 stripping element 63 angle devices

23 deflecting means 40 66 cleaning device

24 spring

25 pinch roller 70 chute arrangement

26 cleaning device 71 chute

27 spatula 71 a inner wall

28 support ring device 45 72 opening

29 Bearing device 73 Support rod

Claims

claims

A falling shaft arrangement (10; 20; 40; 50; 60; 70), in particular for a device for gluing particles (1), which consist at least partly of fibers and / or chips suitable for producing material plates, wherein the

Chute arrangement (10; 20; 40; 50; 60; 70) comprising:

a chute (21; 41) having an inlet for feeding the particles (1) and an outlet for discharging the particles (1);

a putty (27; 47) arranged to move relative to an inner wall (21a, 41a) of the chute (21; 41) to clean the inner wall (21a, 41a), characterized in that

the chute assembly (10; 20; 40; 50; 60; 70) further comprises at least one flexible scraper member (22; 52; 62) for cleaning the at least one scraper (27; 47),

wherein the flexible scraper element (22; 52; 62) is tensioned over the inner wall (21a; 41a) in the travel path of the at least one scraper (27; 47); and that further drive means are provided, which are arranged, the flexible

Scraper (22; 52; 62) in a movement in one direction of

Longitudinal extension of the flexible stripping element (22; 52; 62).

A chute arrangement (20; 40; 50) according to claim 1, d a d u r c h

characterized in that the at least one flexible stripping element (22; 52) is an endless scraper element (22; 52).

A chute arrangement (20; 40) according to claim 2, characterized

characterized in that the at least one endless stripping element (22) is arranged by deflection means, preferably deflecting rollers (23) so that it encloses a wall element of the chute (21; 41) having the inner wall (21a; 41a; 71a).

Drop shaft arrangement (50) according to claim 2, characterized in that the at least one endless stripping element (52) is arranged such that it is arranged to extend in the region of the inner wall (51a) within the chute (51). A chute assembly (60; 70) according to claim 1, characterized in that two winding means (63) are provided, the flexible stripping member (62) being connected to the winding means (63) for being wound and unwound by the winding means (63) can.

A chute assembly (10; 20; 40; 50; 60; 70) according to any one of claims 1 to 5, characterized in that the drive means are arranged to rotate the at least one flexible stripping element (22; 52; 62) into a circulating movement and / or to move a reciprocating motion in the direction of the longitudinal extent of the stripping element (22; 52; 62).

A chute arrangement (10; 20; 40; 50; 60; 70) according to any one of claims 1 to 6, characterized in that the at least one flexible

Scraper element (22; 52; 62) extends adjacent the inner wall (21a; 41a; 61a) of the chute (21; 41; 61) in a substantially vertical direction and / or a shape of the chute (21; 41; 61) in FIG vertical direction

proceeds accordingly.

The downturn arrangement (20; 40) according to any one of claims 1 to 7, characterized in that further tensioning means, preferably a spring (24) with pressure roller (25) are provided, which are arranged so that the at least one flexible stripping element (22) under tension is held.

A chute arrangement (20; 40; 60; 70) according to any one of claims 1 to 8, characterized in that there is further provided a cleaning device (26; 66), the at least one scraping element (22; 52; 62) being attached to the cleaning device (26 ; 66) passing by or through the

Cleaning device (26, 66) is guided running therethrough.

A chute arrangement (20; 40; 60; 70) according to claim 9, characterized

characterized in that the cleaning device (26; 66) is designed as a fluid bath, a brush, a wiper edge, or a stripping cylinder.

11. A chute arrangement (10; 20; 40; 50; 60; 70) according to any one of claims 1 to 10, characterized in that the spatula (27, 47) as

Spachtelklinge, as a scraper, as a spatula, or as a rod is formed.

A chute arrangement (10; 20; 40; 50; 60; 70) according to any one of the preceding claims, characterized in that the at least one flexible stripping element (22; 52; 62) is a rope, in particular a wire rope, a wire, a band or a Chain is formed.

The chute arrangement (10; 20; 40; 50; 60; 70) according to any one of the preceding claims, characterized in that the chute (21; 41) is tapered in cross-section from top to bottom in the falling direction of the particles (1).

A chute arrangement (10; 20; 40; 50; 60; 70) according to any one of the preceding claims, characterized in that the chute (21; 41) is cylindrical or conical.

A chute arrangement (10; 20; 40; 50; 60; 70) according to any one of the preceding claims, characterized in that the chute (41) has a substantially concave shape.

A chute arrangement (10; 20; 40; 50; 60; 70) according to any one of the preceding claims, characterized in that the inner wall (21a; 41 71a) is scraped off at least once every two minutes.

A chute arrangement (10; 20; 40; 50; 60; 70) according to any one of the preceding claims, characterized in that a further

Tempering device is provided for tempering the inner wall (21a, 41 71 a) to a temperature which is below a threshold for the curing of the binder, preferably below 70 ° C.

18. Device for gluing particles (1), at least partially from the

Manufacture of material plates suitable fibers and / or chips, characterized in that the device is a

A chute assembly (10; 20; 40; 50; 60; 70) according to any one of the preceding claims.

The device of claim 18, further comprising

a supply means for feeding the particles (1); and

a plurality of nozzles (6) for dispensing a binder, the nozzles being arranged in an area inside the chute (21; 41) and / or above an inlet opening of the chute (21; 41).

Apparatus according to any one of claims 18 to 19, further comprising a mixing device (7) downstream of the chute assembly (10; 20; 40; 50; 60; 70).