DE202012104539U1 - Chute arrangement, in particular for a device for gluing particles in the course of the production of material plates - Google Patents

Abstract

Chute arrangement, in particular for a device for gluing particles (1), which at least partially consist of fibers and / or chips suitable for the production of material panels, the chute arrangement (10; 20) having a chute (21) which has an inlet for feeding the particle (1) and an outlet for dispensing the particles; characterized in that the chute arrangement (10; 20) further comprises: a first guide device; a second guide means; and at least one flexible stripping element (22) for cleaning at least one inner wall (21a, ..., 21d) of the chute (21); wherein the first guide device and the second guide device are set up to hold and guide the at least one stripping element (22), such as a relative movement in the tangential direction to the at least one inner wall (21a, ..., 21d) between the stripping element (22 ) and the at least one inner wall (21a, ..., 21d) of the chute (21), further drive means (26) being provided which are set up on the chute (21), the first guide device, the second guide device and / or act on the at least one stripping element (22) to generate the relative movement.

Description

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 is known, the compression of processed chips or fibers takes place either clock-bound or continuously. 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 treated in a downstream of the chute drum with rotating conveyor tools (mechanical mixer) and / or glued on and then sprinkled to a grit mat and then pressed in real time, before curing a glue. Alternatively, the grit, without passing through a mechanical mixer, be placed directly in a spreader to scatter the grit mat and then to press.

Such a device is for example off DE 10 2010 064 339 A1 known.

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 in the document WO 2011/134844 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. Driven so driven the doctor 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 that form larger deposits on the inner wall of the chute, but at the price that new elements and surfaces are introduced into the chute with the doctor blades, which in turn pollute and on which solid deposits can form. Thus, it can happen, especially in large plants, that can form on the doctor blades caking, which weigh up to 50 kg and can fall off in a lump, which can lead to damage of the mixer and / or the subsequent machines.

In the document WO 2011/134844 A1 Therefore, it is proposed to cool the doctor blades to a temperature which is below the condensation point of the humidity, so that a Condensate film is formed on the surfaces, which is to reduce the adhesiveness of the injected chemical components, in particular of thermosetting 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 document WO 2011/134844 A1 proposed doctor blade cooling can not be used effectively.

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, a use of the document WO 2011/134844 A1 proposed Schaberklingenkühlung not be displayed.

In addition, it is for the realization of the document WO 2011/134844 A1 proposed Schaberklingenkühlung required to provide appropriate supply lines and discharges for a cooling fluid having a sufficient delivery capacity. In order to supply the walls of a rotating chute and / or rotary doctor blades with the cooling fluid, it is also necessary that corresponding fluid-carrying 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 rotary doctor blades enable. The mechanical structures required for this can be a great deal of effort and it may be difficult to achieve a permanently effective seal, especially for a 24/7 operation.

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 at least partially consist of fibers and / or chips suitable for producing material plates, wherein the chute arrangement has a chute which has an inlet for feeding the particles and an outlet for discharging the particles and the chute arrangement further comprises: a first guide means, a second guide means, and at least one flexible stripping member for cleaning at least one inner wall of the chute, wherein the first guide means and the second guide means are adapted to hold the at least one scraper element and to guide, so as to allow a relative movement in the tangential direction to the at least one inner wall between the scraper element and the at least one inner wall of the chute, wherein further drive means are provided, the s ind, on the chute, the first guide means, the second guide means and / or the at least one stripping element for generating the relative movement act.

The use of a flexible wiper element has the advantage that the wiper element can easily adapt to different shapes.

The at least one flexible stripping element is preferably designed as a wire, as a rope, as a band or as a chain, wherein the at least one stripping element is held taut by the first guide device and the second guide device.

In particular, the use of a rope or a wire has the advantage that this or this can be very varied in structure and already unprocessed has a rough surface, which is particularly suitable for cleaning. In addition, both have a relatively small surface, which effectively precludes the formation of large adhesions. In addition, due to its high flexibility, a rope has relatively high self-cleaning characteristics and is also easy to clean.

Alternatively, the at least one flexible stripping element can also be designed as a flexible rod, in particular as a flexible round rod.

As a rod, in particular a round rod or rod with an oval, triangular, rectangular or otherwise polygonal cross-section, a has relatively small surface area, the likelihood of larger solid buildup on it is reduced. Drive means are furthermore preferably provided which are set up to set the at least one flexible stripping element in a reciprocating movement in the direction of the longitudinal extent of the stripping element.

By the reciprocating movement of the scraper element, which can be in particular an oscillating movement, the stripping effect, which the scraper element on the inner wall or deposits, which adhere to the inner wall, can be improved.

The first guide device and the second guide device may each have a winding device, wherein the flexible wiper element is connected to the winding devices in order to be wound up and unwound by the winding devices.

In a preferred embodiment, the flexible stripping element is endless.

It can be further preferably provided drive means which are adapted to enable the flexible endless wiper element in a circumferential movement.

By the circumferential movement of the scraper element, which may in particular be combined continuously, intermittently or with a reciprocating motion, the stripping effect which the flexible, endless scraper element has on the inner wall or on deposits which adhere to the inner wall can be improved.

It is further preferred that the first guide device has a first deflection device and the second guide device has a second deflection device, wherein the flexible stripping element is designed to run continuously around the first and the second deflection device.

The endless, flexible stripping element can be arranged such that it runs around a wall of the chute having the inner wall.

Alternatively, the flexible, endless scraper element can be arranged such that it is arranged running in the region of the inner wall within the chute.

The at least one endless stripping element may extend adjacent the at least one inner wall of the chute in a substantially horizontal direction.

Alternatively, the at least one endless scraper element adjacent to the at least one inner wall of the chute may extend in a substantially vertical direction and / or correspondingly extend in a vertical direction to a shape of the chute.

In a preferred embodiment, the first and / or the second guide means comprises a plurality of guide means, in particular guide rollers or guide gears and an endless guide element, in particular an endless guide wire, an endless guide belt, an endless guide wire or an endless guide chain, which or the guide means rotates, wherein the at least one stripping element is attached directly or via holding means and / or deflection means to the endless guide element.

Preferably, the guide means are arranged to tension the endless guide member so that the endless guide member extends in the region of the at least one inner wall of the chute in a substantially horizontal plane.

Alternatively, the guide means may be arranged to tension the endless guide member so that the endless guide member extends substantially vertically in the region of the at least one inner wall of the chute and / or correspondingly extends in the vertical direction to a shape of the inner wall of the chute.

It can further be provided clamping means which are adapted to act on the first guide means and / or the second guide means and / or the at least one stripping, that the at least one stripping element is kept under tension.

Preferably, a cleaning device may be provided for cleaning the at least one stripping element.

The stripping element is preferably guided past the cleaning device or guided through the cleaning device.

The cleaning device can in particular be designed as a fluid bath, a brush, a doctor blade, a wiper edge or a stripping cylinder.

Alternatively or additionally, cleaning device can be designed as an obstacle that can be introduced in the travel path of the at least one stripping element.

The insertable obstacle may in particular be arranged in a wall of the chute having at least one inner wall, wherein the insertable obstacle projects between a first position in which the obstacle protrudes from the inner wall towards the interior of the chute and a second position in which the obstacle does not project beyond the inner wall towards the interior of the chute, is adjustable.

Preferably, at least one scraper blade or spatula can be further provided which is attached to the at least one scraper element.

More preferably, two in the region of the inner wall of the chute substantially parallel stripping elements may be provided, wherein the at least one scraper blade or spatula is arranged between the two parallel stripping and fixed thereto.

The chute may be tapered in the direction of the particle from top to bottom in cross section.

The chute may be cylindrical, conical, cube-shaped, designed as a regular or irregular polygon or wedge-shaped.

The chute may have cross sections of different shape in the region of the inlet and in the region of the outlet.

The cross sections of different shapes may be selected from circular, elliptical, square, rectangular, a shape of a regular or an irregular polygon and a shape consisting of composite arc segments.

The chute can be formed in one piece. Preferably, the chute is formed in several parts, with a plurality of walls, each forming an inner wall of the chute.

The chute can have a substantially concave shape. In particular, the walls which have the inner walls of the chute can be cambered.

The chute arrangement can be designed such that the at least one inner wall can be stripped off at least once every two minutes, preferably once in one minute.

Preferably, a tempering device may further be provided for tempering the at least one inner wall to a temperature which is below a threshold for the curing of the binder, preferably below 70 ° C.

The chute arrangement may preferably be part of a device for gluing particles, which consist at least partially of fibers and / or chips suitable for producing material plates. In particular, the particle sizing device may comprise a feed device for feeding the particles, and a plurality of nozzles for dispensing a binder, wherein the nozzles are arranged in an area within the chute and / or above an inlet opening of the chute.

The device for the gluing of particles may preferably further comprise a mixing device downstream of the chute arrangement.

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

1 shows schematically a device for the gluing of particles;

2a shows a schematic plan view of a chute arrangement according to a first embodiment of the present invention;

2 B FIG. 12 is a schematic lateral cross-sectional view of the chute assembly of FIG 2a group;

3a shows in a schematic lateral cross-sectional view of a chute assembly according to a second embodiment of the present invention;

3b FIG. 12 is a schematic plan view of the chute assembly of FIG 3a group;

3c FIG. 12 is a schematic plan view of the chute assembly of FIG 3a in an alternative embodiment;

3d FIG. 12 is a schematic plan view of the chute assembly of FIG 3a in an alternative embodiment;

4a shows in a schematic lateral cross-sectional view of a chute assembly according to a third embodiment of the present invention;

4b FIG. 12 is a schematic plan view of the chute assembly of FIG 4a group;

5a shows a schematic plan view of a chute arrangement according to a fourth embodiment of the present invention; and

5b FIG. 12 is a schematic lateral cross-sectional view of the chute assembly of FIG 5a represents.

In 1 is a schematic view of a device for the gluing of particles 1 starting with the dosing device 2 and ending with a mixing device 7 shown in a general representation. In between are a chute 3 and a chute assembly to be described in more detail below 10 arranged. The particles 1 are doing as a particle stream in the metering device 2 , usually from a particle bunker by means of discharge devices, registered, weighed there and a standard band control (not shown) for dosing in the chute 3 brought in. There the particle flow or particles hits 1 on a dissolving device 4 and becomes a particle curtain there 5 resolved and / or split.

The dissolving device 4 can in particular rake and / or baffles, spoke rollers (consisting of at least two discs which have arranged at a radial distance from the axis of rotation (with or without a continuous shaft) rods, tubes or the like parallel to the axis of rotation) and / or opening rollers, preferably designed as spiked rollers , exhibit. The dissolved particle curtain 5 is subsequently by means of suitable nozzles 6 sprayed with a binder and glued. In the course of the particle curtain falls 5 through the chute arrangement 10 and then enters the chute assembly 10 downstream mixing device 7 in which by means of a shaft driven by a rotating 9 Mixing tools 8th Mix the glued particles again mechanically and finally output as a mixed particle flow (discharge arrow). 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. Basically, the chute arrangement should 10 have a sufficient drop height, so that the binder sufficiently strong with the particles 1 can and should preferably in the direction of fall at least half as long as the chute 3 be educated.

Like in the 1 shown, can the chute 3 and the chute arrangement 10 be provided as separate facilities. Alternatively, it is also possible that the chute 3 a unit with a chute of the chute arrangement 10 forms.

With reference to the 2a to 5b Now, various embodiments of a chute assembly will be described, which serves as a chute arrangement 10 in the device of 1 is usable.

A first embodiment of a chute arrangement 20 is in the 2a and the 2 B shown. Like in the 2a in a top view and in the 2 B Shown schematically in a lateral cross-sectional view, the chute arrangement 20 a chute 21 on. The chute 21 is formed in this example with a rectangular cross-section, with four walls, the four inner walls 21a to 21d of the chute 21 define.

As in the 2a and 2 B is shown in the area of the inlet of the chute 21 and in the area of the outlet of the chute 21 each arranged a guide device, which is an endless guide element 25 such as a chain, and guide means 24 , such as gears. As in particular in 2a shown, the gears are arranged so that they span the circulating chain so that they are the chute 21 circulates.

The examples mentioned are not restrictive and it can be used as a guide element and a rope, in particular a steel cable, a band, a wire or the like. As a guide means, rollers, slides or other elements can be used, which are adapted to hold the corresponding guide means to guide accordingly and to redirect as needed.

Between the guide means is a flexible stripping element 22 , For example in the form of a round rod, arranged at its ends in each case via holding elements 23 on the chain 25 is attached. The round rod 22 extends substantially vertically near or in contact with an inner wall 21a of the chute 21 ,

A drive 26 For example, a motor may be connected to one of the gears of one of the guide means to drive and move the chain. Since the round bar is connected to the chain of the upper guide means, the round bar is thus brought in a direction tangential to the surface of the inner wall 21a to move. In this way, the round rod as a stripping element 22 the inner wall 21a brush over and clean it by removing any binder, or glued particles, that build up on the inner wall 21a have been staked off.

The lower guide device can also be a motor as a drive 26 exhibit. Alternatively, it is also possible that the lower guide device has no motor or another drive and the guide element of lower guide device passively by the movement of the round rod 22 is moved. Likewise, it is also possible to couple the lower guide means with a drive and the upper guide means passive, that is, to design without drive.

There, as in the 2a shown, the chain is so stretched, the chute 21 to orbit, can with a single round rod 22 successively all interior walls 21a to 21d of the chute 21 be overstretched by the chain is driven so the chute 21 completely circulating at least once. As with appropriate arrangement of appropriate guide 24 the guide element 25 , as here the chain, in almost arbitrary form tension and can lead, it is possible, shafts 21 with almost any shape in cross-section to clean.

While in the 2a and 2 B only a round rod as a stripping element 22 This is not limiting and it can also be several round rods, or more generally a combination of several identical or different flexible stripping elements 22 to be ordered. In particular, in a chute 21 which is composed of a plurality of wall elements or walls, each having an inner wall 21a , ..., 21d of the chute, at least one stripping element 22 for each an inner wall 21a , ..., 21d be provided. Furthermore, it is possible that all stripping elements 22 are arranged on a common guide device, or that a plurality of guide means are provided, each one or more of the stripping elements 22 assigned.

The 3a to 3d provide a chute arrangement 20 according to a second embodiment.

As in the 3a and 3b is shown in this embodiment, the chute 21 designed in several parts, with four walls, the four interior walls 21a to 21d define. In the area of the inlet points the chute 21 a rectangular cross-section on while the chute 21 is formed in the region of the outlet with a circular cross-section. The walls of the chute 21 are arcuately curved, so that the chute 21 in the direction of the particle from top to bottom tapers.

In this embodiment, the flexible stripping element 22 designed as an endless rope, in particular as a wire rope, wherein the rope via a deflecting device 31 , here a pulley, so guided and held, that there is a wall of the chute 21 wraps around, leaving the rope in both the chute 21 adjacent to an interior wall 21d , as well as outside the drop shaft 21 runs. In the lower end of the chute 21 The walls are each formed with a bead or arc section, which serves to the rope 22 to divert and hold. The bead can therefore as a guide device and as a deflection 32 to be viewed as.

The deflection roller of the deflection 31 is associated with a guide means according to the guide means of the first embodiment with a chain, a band, a rope or a wire as a guide element 25 and rollers or gears as guide means 24 can be provided.

The pulley may be associated with a drive (not shown) to the rope over the pulley 22 to move in the direction of the extension of the endless rope in motion. The movement may be an intermittent or continuous circumferential movement of the rope, or an oscillating reciprocation of the rope, or a combination thereof.

Due to the interior of the chute 21 pointing curved or concave shape of the chute 21 , in which the walls can be formed in particular cambered, there is the advantageous effect that the rope to a particularly good support against the inner wall 21d of the chute 21 comes to rest and due to its flexibility the shape of the inner wall 21d adapts. This allows a particularly secure cleaning of the inner wall 21d , or of all interior walls 21a to 21d of the chute 21 be achieved.

In order to increase this effect even more tensioning devices can be added 33 ; 34 be provided in the 3a are exemplified as a spring and pinch roller to tension the rope.

The flexibility of the rope also allows the rope to be attached to different cross sections of the chute 21 as a rectangular cross-section with a large opening width in the inlet region and a much smaller circular cross-section in the outlet region, such as in the 3a and 3b shown.

To improve the cleaning effect and to avoid that on the rope adhesions of the gluing agent or glued particles 1 form, which could clump, may additionally a cleaning device 35 for cleaning the scraper element 22 the rope provided and arranged so that the rope passes past or through this.

The cleaning device 35 may be installed in a predetermined fixed location to clean the rope when it is moved by the guide means and associated drive means in a corresponding cleaning position. The cleaning device 35 can also be associated with a guide device and move with it, to the movement of the rope on the inner walls 21a to 21d of the chute 21 to follow.

The cleaning device 35 may be formed, for example, as a brush, scraper blade, or as a scraping edge, where the rope is moved past, or as a stripping gap or as a stripping cylinder through which the rope passes. The cleaning device 35 may also be configured as a fluid bath, which is filled, for example, with water and / or a cleaning agent and through which the cable is guided to Beleimungsmittel or particles 1 to wash off and solve this.

In another (not shown) variant, the cleaning device 35 be formed as a einbringbares in the travel of the rope obstacle, preferably in a at least one inner wall 21a , ..., 21d having wall of the chute 21 is arranged, wherein the insertable obstacle between a first position in which the obstacle from the inner wall 21a , ..., 21d towards the interior of the chute 21 protrudes, and a second position in which the obstacle does not have the inner wall 21a , ..., 21d protrudes, is adjustable. The insertable obstacle can be adjusted, for example pneumatically, hydraulically or by electric motor and can be formed for example as a mandrel or cone. When the insertable obstacle is introduced, it is the movement of the scraper element 22 opposite. The rope is thereby tensioned until it "snaps past" the obstacle or until the rope is released by adjusting the obstacle. The thus tensioned rope relaxes in a sudden movement that swing the rope and "tremble" and / or on the inner wall 21a , ..., 21d can whip up, causing gluing agents and / or particles 1 , which have settled on the rope, can be shaken off. It is preferred that the direction of movement of the rope can be reversed to move the rope from both directions against the adjustable obstacle.

Like in the 3c illustrated, it is also possible to use several endless ropes at the same time, which are attached via corresponding pulleys to a common guide device, such as a guide chain and guide gears, so that they together over the inner walls 21a to 21d of the chute 21 can be moved.

Through the multiple ropes are the inner walls 21a to 21d in a loop around the chute 21 repeatedly overlined, which leads to a better cleaning performance.

In addition, a scraper blade can also be used 37 or a spatula disposed between and attached to the two substantially parallel ropes. The scraper blade 37 is therefore moved along with the movement of the cables in the longitudinal direction, so as to over the inner wall 21d to strip. Through the ropes, on the one hand, and the scraper blade 37 On the other hand, therefore, can be a gluing of the inner walls 21a to 21d of the chute 21 in two directions tangential to the inner walls 21a to 21d take place, so that an improved cleaning performance can be achieved.

While in the 3a and 3b the endless rope enclosing a wall, it is in an in 3d illustrated modification also possible, the endless rope through a pulley 38 so to lead it inside the chute 21 runs so that the trailing and the returning section of the rope 22 both in abutment against the inner wall 21d of the chute 21 come. Such guidance of the rope has the advantage of a smaller space requirement, since no free space for the outside of the chute 21 extending section of the rope, as in 3a shown is required. In addition, the inner wall 21d twice overlined by the double rope, resulting in a better cleaning performance.

The 4a and 4b show a third embodiment, in which the upper and the lower guide means each have a winding device 41 is assigned, which is the rope 22 can wind up and unwind. By appropriate control of a drive (not shown) of the winding devices 41 For example, the rope can be moved in a reciprocating motion in the longitudinal direction of the rope.

The management facilities can, as in the 4b shown, as infeed axes or as rails 42 be formed, where the winding devices 41 are slidably mounted, for example, with a carriage (not shown), in the running rail 42 moves. In the 4b is an example of a running rail 42 shown, which is a winding device 41 is assigned to guide and hold them, and the winding device 41 the this circulating rope 22 , By means of the track 42 can the rope 22 over the surface of the inner wall 21d be moved away. For the other interior walls 21a , ..., 21c of the downfall funnel 21 it is also possible in each case to provide slide rails on which winding devices are arranged, which corresponding ropes are assigned; Because of the clarity of the presentation was in the 4b waived their representation.

In the first to third embodiments, examples have been given in which a flexible stripping element 22 runs in a vertical direction in the region of an inner wall. However, this is not limiting, and as in the 5a and 5b shown fourth embodiment, the chute arrangement 20 also be designed so that a flexible scraper element 22 adjacent to an interior wall 21a , ..., 21d of the chute 21 extends in a substantially horizontal direction, for example as an endless rope, the deflection rollers of an angle device 41 to be led.

Preferred is for each inner wall 21 , ..., 21d of the chute 21 one flexible stripping element each 22 provided that, for example, can be designed as an endless rope, which is arranged so the respective inner wall 21d to embrace how it is in the 5a the example of the inner wall 21d is shown.

The interior walls 21a , ..., 21d of the chute 21 may extend in a substantially straight line in the horizontal direction, or may be concave, in particular cambered, so that they are in the direction of the interior of the chute 21 bent as shown in the 4a the example of the inner wall 21b shown.

The pulleys of the guide means 24 are associated with respective guide means (not shown) which may be arranged to move the diverting pulleys in a substantially vertical direction as indicated by the arrows of FIGS 5b displayed so that the wiper element 22 the extent of the inner wall 21a of the chute 21 following in a substantially vertical direction tangential to the surface of the inner wall 21a is moved and this wipes in a substantially vertical direction. As guide means may be provided band or cables, similar to those described with reference to the first to fourth embodiments. It is also possible to design the guide devices as guides, in particular linear guides, wherein the deflection rollers are each attached to a slide (not shown) running in the guide, which is actuated by an electric motor, pneumatically or hydraulically. The movement axis can be suitably substantially perpendicular, substantially the course of the lateral edge of the inner wall 21a following or otherwise appropriate.

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.

In particular, in a chute arrangement 20 different types of scraper elements 22 and / or leadership facilities are combined.

Also, the guide means are not limited to the examples described. Thus, instead of the guide means described, for example, as guides, in particular linear guides, designed guide means are provided which have a running in the guide carriage (not shown), which is actuated by electric motor, pneumatic or hydraulic.

Also, guide means may be used which are in the form of a slide rail on which a scraper member is slidably held, for example, by a sliding member or roller disposed in the rail.

While in the embodiments described above, examples have been given in which the stripping element 22 by means of the first and second guide means relative to an inner wall 21a , ..., 21d of the chute 21 is moved, this is not limiting, and it is also possible to move the chute itself by suitable drive means. For example, the chute 21 Be configured rotationally symmetrical and are offset by appropriate drive means in a rotational movement, so that the inner wall of the chute 21 with reference to the stripping element 22 emotional. The stripping element 22 can be held stationary by corresponding first and second guide means, while the inner wall moves past this. It is also possible to combine a movable stripping element with a movable chute.

The guide devices can be arranged both outside and inside the space defined by the chute. If the guide means are disposed within the chute, covers may be provided to protect the guide means from smearing, and / or additional scraper means, which may be disposed on the flexible scraper member, for example, within the chute arranged to overlap guide means and thus to clean.

Furthermore, the chute arrangement can have a tempering device for tempering the at least one inner wall 21a , ..., 21d to a temperature which is below a threshold for the curing of the binder, preferably below 70 ° C.

LIST OF REFERENCE NUMBERS

1

 particles

2

 metering

3

 chute

4

 dissolver

5

 particle curtain

6

 jet

7

 mixing device

8th

 Mixing tools

9

 wave

10

 Chute arrangement

20

 Chute arrangement

21

 chute

21a, ... 21d

 inner wall

22

 stripping element

23

 retaining element

24

 guide means

25

 guide element

26

 drive means

31

 deflecting

32

 deflecting

33

 clamping means

34

 clamping means

35

 cleaning device

37

 scraper blade

38

 idler pulley

41

 angle device

42

 runner

51

 inner wall

QUOTES INCLUDE IN THE DESCRIPTION

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

Cited patent literature

• DE 102010064339 A1 [0006]
• WO 2011/134844 A1 [0009, 0011, 0012, 0013, 0014]

Claims (30)

Chute arrangement, in particular for a device for gluing particles ( 1 ), which consist at least partially of fibers and / or chips suitable for producing material plates, wherein the drop shaft arrangement ( 10 ; 20 ) a chute ( 21 ) having an inlet for feeding the particles ( 1 ) and an outlet for dispensing the particles; characterized in that the chute arrangement ( 10 ; 20 ) further comprises: a first guide means; a second guide means; and at least one flexible stripping element ( 22 ) for cleaning at least one inner wall ( 21a , ..., 21d ) of the chute ( 21 ); wherein the first guide means and the second guide means are arranged, the at least one scraper element ( 22 ) to hold and guide, in such a way, a relative movement in the tangential direction to the at least one inner wall ( 21a , ..., 21d ) between the stripping element ( 22 ) and the at least one inner wall ( 21a , ..., 21d ) of the chute ( 21 ), whereby further drive means ( 26 ) are provided, which are arranged on the chute ( 21 ), the first guide device, the second guide device and / or the at least one stripping element ( 22 ) to produce the relative movement. Chute arrangement ( 10 ; 20 ) according to claim 1, characterized in that the at least one flexible stripping element ( 22 ) is formed as a wire, as a rope, as a band or as a chain, wherein the at least one stripping element ( 22 ) is kept taut by the first guide means and the second guide means. Chute arrangement ( 10 ; 20 ) according to claim 2, characterized in that drive means are provided, which are arranged, the at least one flexible stripping element ( 22 ) in a reciprocating motion in the direction of the longitudinal extent of the stripping element ( 22 ) to move. Chute arrangement ( 10 ; 20 ) according to one of the preceding claims, characterized in that the first guide device and the second guide device each have a winding device ( 41 ), wherein the flexible stripping element ( 22 ) with the winding devices ( 41 ) is connected to the winding devices ( 41 ) can be wound up and handled. Chute arrangement ( 10 ; 20 ) according to one of claims 1 to 3, characterized in that the flexible stripping element ( 22 ) is formed endlessly. Chute arrangement ( 10 ; 20 ) according to claim 5, characterized in that drive means are provided, which are arranged, the endless scraper element ( 22 ) in a circumferential movement. Chute arrangement ( 10 ; 20 ) according to one of claims 5 to 6, characterized in that the first guide device comprises a first deflection device ( 31 ) and the second guide device has a second deflection device ( 32 ), wherein the flexible stripping element ( 22 ) around the first and the second deflection device ( 31 ; 32 ) is continuously trained. Chute arrangement ( 10 ; 20 ) according to one of claims 5 to 7, characterized in that the endless flexible stripping element ( 22 ) is arranged so that it has an inner wall ( 21a , ..., 21d ) wall of the chute ( 21 ) runs around. Chute arrangement ( 10 ; 20 ) according to one of claims 5 to 7, characterized in that the endless stripping element ( 22 ) is arranged so that it is in the region of the inner wall ( 21a , ..., 21d ) within the chute ( 21 ) is arranged running. Chute arrangement ( 10 ; 20 ) according to one of the preceding claims, characterized in that the at least one endless stripping element ( 22 ) adjacent to the at least one inner wall ( 21a , ..., 21d ) of the chute ( 21 ) extends in a substantially horizontal direction. Chute arrangement ( 10 ; 20 ) according to one of claims 1 to 10, characterized in that the at least one flexible stripping element ( 22 ) adjacent to the at least one inner wall ( 21a , ..., 21d ) of the chute ( 21 ) extends in a substantially vertical direction and / or a shape of the chute ( 21 ) runs in the vertical direction accordingly. Chute arrangement ( 10 ; 20 ) according to one of the preceding claims, characterized in that the first and / or the second guide device comprises: a plurality of guide means ( 24 ), in particular guide rollers or guide gears, and an endless guide element ( 25 ), in particular an endless guide wire, an endless guide band, an endless guide wire or an endless guide chain, which or the guide means ( 24 ), wherein the at least one stripping element ( 22 ) directly or via holding means ( 23 ) and / or deflection means ( 31 . 32 ) to the endless guide element ( 25 ) is attached. Chute arrangement ( 10 ; 20 ) according to claim 12, wherein the guide means ( 22 ) are arranged, the endless guide element ( 25 ) so that the endless guide element ( 25 ) in the region of the at least one inner wall ( 21a , ..., 21d ) of the chute ( 21 ) runs in a substantially horizontal plane. Chute arrangement ( 10 ; 20 ) according to claim 12, wherein the guide means ( 22 ) are arranged, the endless guide element ( 25 ) so that the endless guide element ( 25 ) in the region of the at least one inner wall ( 21a , ..., 21d ) of the chute ( 21 ) extends substantially vertically and / or a shape of the inner wall ( 21a , ..., 21d ) of the chute ( 21 ) runs in the vertical direction accordingly. Chute arrangement ( 10 ; 20 ) according to one of the preceding claims, characterized in that further clamping means ( 33 . 34 ) are provided, which are arranged on the first guide device and / or the second guide device and / or the at least one stripping element ( 22 ), that the at least one stripping element ( 22 ) is kept under tension. Chute arrangement ( 10 ; 20 ) according to one of the preceding claims, characterized in that a cleaning device ( 35 ) for cleaning the at least one stripping element ( 22 ) is provided. Chute arrangement ( 10 ; 20 ) according to claim 16, characterized in that the stripping element ( 22 ) at the cleaning device ( 35 ) passing by or through the cleaning device ( 35 ) is guided running therethrough. Chute arrangement ( 10 ; 20 ) according to claim 17, characterized in that the cleaning device ( 35 ) is designed as a fluid bath, a brush, a scraper edge, or a stripping cylinder. Chute arrangement ( 10 ; 20 ) according to claim 17, characterized in that the cleaning device ( 35 ) as a in the travel of the at least one scraper element ( 22 ) einbringbares obstacle is formed. Chute arrangement ( 10 ; 20 ) according to claim 19, characterized in that the insertable obstacle in one of the at least one inner wall ( 21a , ..., 21d ) wall of the chute ( 21 ), wherein the insertable obstacle between a first position in which the obstacle from the inner wall ( 21a , ..., 21d ) in the direction of the interior of the chute ( 21 ) and a second position in which the obstacle does not protrude beyond the inner wall ( 21a , ..., 21d ) protrudes, is adjustable. Chute arrangement ( 10 ; 20 ) according to one of the preceding claims, characterized in that further at least one scraper blade or a spatula is provided, which or on the at least one scraper element ( 22 ) is attached. Chute arrangement ( 10 ; 20 ) according to claim 21, characterized in that two in the region of the inner wall ( 21a , ..., 21d ) of the chute ( 21 ) substantially parallel stripping elements ( 22 ) are provided, wherein the at least one doctor blade or spatula between the two parallel stripping elements ( 22 ) is arranged and secured thereto. Chute arrangement ( 10 ; 20 ) according to one of the preceding claims, characterized in that the chute ( 21 ) is formed in the direction of fall of the particles from top to bottom in cross-section tapered. Chute arrangement ( 10 ; 20 ) according to one of the preceding claims, characterized in that the chute is cylindrical, conical, cube-shaped, designed as a regular or irregular polygon, or wedge-shaped. Chute arrangement ( 10 ; 20 ) according to one of the preceding claims, characterized in that the chute in the region of the inlet and in the region of the outlet has cross sections of different shape. Chute arrangement ( 10 ; 20 ) according to claim 25, characterized in that the cross-sections of different shape are selected from circular, elliptical, square, rectangular, a shape of a regular or irregular polygon, and a shape consisting of composite arc segments. Chute arrangement ( 10 ; 20 ) according to one of the preceding claims, characterized in that the chute ( 21 ) is formed in several parts, with a plurality of walls, each having an inner wall ( 21a , ..., 21d ) of the chute ( 21 ) train. Chute arrangement ( 10 ; 20 ) according to one of the preceding claims, characterized in that the chute ( 21 ) has a substantially concave shape. Chute arrangement ( 10 ; 20 ) according to one of the preceding claims, characterized in that the at least one inner wall ( 21a , ..., 21d ) is stripped off at least once every two minutes. Chute arrangement ( 10 ; 20 ) according to one of the preceding claims, characterized in that a tempering device is further provided for tempering the at least one inner wall ( 21a , ..., 21d ) to a temperature which is below a threshold for the curing of the binder, preferably below 70 ° C.

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