WO2014079987A1

WO2014079987A1 - Fall duct arrangement, device, and method for cleaning a fall duct, in particular a device for gluing particles

Info

Publication number: WO2014079987A1
Application number: PCT/EP2013/074512
Authority: WO
Inventors: Reinhard Schwinn
Original assignee: Dieffenbacher GmbH Maschinen- und Anlagenbau
Priority date: 2012-11-22
Filing date: 2013-11-22
Publication date: 2014-05-30
Also published as: DE102013112947A1; EP2922672A1; CN104812541B; EP2922672B1; CN104812541A

Abstract

The invention relates to a fall duct arrangement, in particular for a device for gluing particles which consist at least partly of fibers and/or chips suitable for producing material boards. According to the invention, the fall duct arrangement (20) additionally has a device for moving the fall duct (10) and/or a fall duct element (11, 12) between a working position and a cleaning position. The invention further relates to a method for cleaning a fall duct, in particular a fall duct (10) of a device for gluing particles (1) which consists at least partly of fibers and/or chips suitable for producing material boards, having the following steps: moving the fall duct (10) or a fall duct element (11, 12) from a working position into a cleaning position; and cleaning the fall duct (10) or the fall duct element (11, 12) in the cleaning position.

Description

Downfall arrangement, apparatus and method for cleaning a chute, in particular in a device for gluing particles

The present invention relates to a chute assembly according to the preamble of claim 1, apparatus according to claim 8 and a method for cleaning a chute, in particular a chute of a device for gluing particles according to the preamble of claim 12.

The production of material plates from, for example, chips or medium-density fibers or other free-flowing materials are now automated

Processes and are already used in many countries for 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 using spreading machines plays a role here

outstanding role, since the quality of the grit mat created is an important factor in addition to the quality of the raw materials. The urge to make

inexpensive material plates made of natural raw materials and artificial

Produced binder forces producers to develop more and more efficient processes. Particular emphasis is particularly 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 repellents and fungicides and other additives 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, with the Binders is acted upon or become. The glued spreading material is usually in a downstream of the chute drum with rotating

Handling tools (mechanical mixer) treated and / or glued on and then scattered to a grit mat and then promptly, before

Curing a glue, pressed. Alternatively, the grit may be introduced directly into a spreader without passing through a mechanical mixer to sprinkle the grit mat and then crimp.

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

In these devices, it usually happens that bind binder and particles glued with the binder on the inner wall of the chute, so that the chute tends to pollute with time. This makes it necessary to clean the chute regularly.

For the purpose of cleaning accesses or hatches are often provided in such devices, which are usually large industrial plants, can enter through the operator in the chute to clean the chute. The cleaning is usually done by means of high-pressure cleaner and / or steam, with water or with solvents or other additives added

Cleaning agents can be used. As a rule, it is also necessary to mechanically remove the necessary caking of glue lumps or material-glue coagulations. Here, there is the disadvantage that the chute is difficult to access and in many cases usually offers little room for the operator, which makes cleaning difficult, time-consuming and not very ergonomic.

In addition, the water or cleaning agent, along with the dissolved residual particles, passes through the outlet to the downstream mixer or other downstream equipment. It is therefore necessary to clean the mixer or these parts of the system after cleaning the chute; a simultaneous

Cleaning is usually not possible or useful.

A simple insertion of a closure piece as a collecting means for the Although cleaning agent and / or the cleaning residues can provide some relief here, but not facilitate the cleaning activities in the narrow chute itself.

It is therefore an object of the present invention to provide a chute assembly and a method for cleaning a chute, which allow easier cleaning.

Further, it is an object of the present invention to provide a chute assembly that can be easily integrated into already built facilities.

It is also desirable to minimize downtime during cleaning as far as possible or to avoid altogether if possible, in particular preferably with low system complexity. These and other objects of the invention are achieved by a chute assembly according to claim 1, an apparatus according to claim 8 and a method for

Cleaning a chute according to claim 12 solved. 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 the production of material plates, the chute arrangement comprising a chute and a device for moving the chute and / or a chute element between a working position and a cleaning position.

In the cleaning position access to the chute or the chute element is not blocked or impeded by other units of the gluing device, in particular a mixer or a dispensing and / or metering device. The chute or the chute element is therefore easily accessible, which greatly facilitates cleaning. In this cleaning position, there is also no danger that during cleaning a cleaning fluid, removed from the interior of the chute deposits or other waste enter the mixer and pollute it. The means for moving may be arranged to pivot the

Fall chute and / or the chute element to execute a pivot axis. In particular, the pivot axis may be a substantially vertical or horizontal axis.

Alternatively, the means for moving may be arranged to perform a displacement of the chute and / or the chute element along a track axis. In particular, the travel axis may be a substantially horizontal axis.

Preferably, a collecting device for collecting a cleaning agent is provided, wherein the collecting device is arranged below the chute or the chute element in the cleaning position. Alternatively, this collecting device as a closure piece of the chute or the

Subsequent parts of the plant be executed to prevent the penetration of the

Cleaner, of dirty water or detached foreign parts, in this

To avoid system parts.

Preferably, a replacement chute or at least one replacement chute element is further provided, which is or is suitable to take over the function of the first chute or the chute element and preferably from a waiting position in the working position is movable while the first chute or

Fall shaft element is moved in the cleaning position for cleaning. Advantageously, now during a change of business or a

otherwise short stoppage of service to be cleaned chute against a replacement chute, respectively a chute element against

Replacement drop shaft element to be replaced. This makes it possible to perform the production undisturbed by the cleaning and largely eliminate the interruption of operations by cleaning the chute.

In this context, it can be provided that the replacement chute or the replacement chute element is designed as a full substitute, that is additionally arranged in a high-quality fully replaceable version or that one "Dummy" is provided, which is suitable only for short-term use and it lacks essential features, but on the other hand requires no large investment technical investment.Also, such a replacement chute can be made overall lighter and accordingly, the

necessary suspensions or traversing devices are designed smaller, which reduces investment costs.

A device for gluing particles, at least partially from the

Production of material plates suitable fibers and / or shavings may have a corresponding chute arrangement.

Preferably, the apparatus further comprises a supply means for feeding the particles and a plurality of nozzles for discharging a binder, wherein the nozzles are arranged in an area within the chute and / or above an inlet opening of the chute.

The device preferably also has one of the chute arrangement

downstream mixing device on. The device may further comprise a replacement chute or replacement chute element adapted to replace the chute or the chute element in the short or long term.

As a further solution, a method for cleaning a chute, in particular a chute of a device for gluing of particles, which at least partially consist of suitable for the production of material plates fibers and / or chips, comprising the steps: moving the chute or a chute member from a working position in a cleaning position and cleaning the chute or the chute element in the

Cleaning position.

The method may further include the step of collecting cleaning agent exiting the chute or chute element in the cleaning position with a catcher. Preferably, in the step of moving, a pivoting of the chute and / or the chute element about a pivot axis or a displacement of the chute and / or the chute element along a track axis can be performed.

In a further aspect, the inventive features described above can also be realized, in which a partial opening is performed by moving or moving a part of the chute. Preferably, in this case, the outlet of the chute is decoupled from the downstream system parts or at least sealed by means of a suitable means.

It may preferably be provided that a replacement chute or a

Spare chute element is moved from a waiting position to the working position, while the chute or a chute element is cleaned in the cleaning position. This makes it possible to perform the production undisturbed by the cleaning and the interruption of operations by cleaning the

Mostly to eliminate chute. When using an inferior replacement chute (element) this will only serve as a replacement for the chute (-elements) during cleaning, in a fully equivalent design can be dispensed with a quick return and at scheduled intervals, preferably in case of other production disruptions or interruptions an exchange or change take place.

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

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

FIG. 2 is a schematic plan view of a chute assembly according to one embodiment of the present invention; FIG.

FIG. 3 is a schematic plan view of a chute assembly according to another embodiment of the present invention; FIG.

FIG. 4 is a schematic plan view of a chute assembly according to another embodiment of the present invention; FIG. and Fig. 5a to 5c

show in a schematic plan view of a chute arrangement according to yet another embodiment of the present invention. FIG. 1 is a schematic view of a device for gluing

Particles starting with the metering device 2 and ending with a mixing device 7 in a general representation. In between, a chute 10 is arranged. The particles are introduced as a particle stream 1 into the metering device 2, usually from a particle bunker by means of discharge devices, weighed there and introduced via a standard belt control (not shown) for metering into a first or upper chute section of the chute 10. There the particle stream 1 or the particles meets an optional

Opening device 3 and is there dissolved and / or split into a particle curtain 5.

The opening device 3 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 have.

The dissolved particle curtain 5 is then sprayed by means of suitable nozzles 6 with a binder and glued. In the course of the particle curtain 5 falls through a second or lower chute section 12 of the chute 10 and then passes into the downstream mixing device 7, in which by means of a rotating

driven shaft 9 mixing tools 8 mechanically mix the glued particles again 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 in the further course can be pressed in a press to a material plate and / or cured, introduced.

As shown in Figure 1, the chute 10 may consist of several sections or segments or elements, such as the chute element 1 1 and the chute element 12, each forming a segment of the chute 10. However, this is not restrictive and it is also possible, depending on the application, that the chute 10 has only one chute segment, such as the chute element 12, as the chute 10, for example.

FIG. 1 shows the device in an operating position or

Working position in which particles of fibers or chips are glued.

To clean the chute 10, it is provided that the chute 10, or a chute element 11, 12, is moved from the working position into a cleaning position, as will be described below with reference to FIG.

FIG. 2 schematically shows, with solid lines, a chute or a chute element 12 which is in a working position, wherein the outlet region of the chute segment is connected to the inlet of the mixing device 7.

To clean the chute or the chute element 12, this or this is moved to a cleaning position, which is shown drawn in dashed lines in Figure 2. In the cleaning position is the

Chute or the chute element 12 laterally offset relative to the working position, so that the chute or the chute element 12 is easily accessible from above and / or from below, which greatly facilitates cleaning. In this cleaning position, there is no danger that during cleaning a cleaning fluid, removed from the interior of the chute deposits or other waste into the mixing device 7 and pollute it. In this context, it is interesting to note that usually the Mixing devices 7 are self-cleaning due to the high friction occurring therein.

Preferably, the cleaning fluid and / or the wastes may be collected with a catcher 15, such as a catch basin, for example, to be fed to an orderly disposal and / or reprocessing.

In order to enable the movement of the chute or the chute element 12, a corresponding device for moving is provided, which forms a chute arrangement 20 together with the chute or the chute element 12.

In the example of Figure 2, the means for moving is designed as a slide rail 14 of high load on which a carriage 13 is slidably mounted. The chute or the chute element 12 is supported supported on the carriage 13. By means of a drive device (not shown), the carriage 13, and thus the chute or the chute element 12, can be moved from the working position into the cleaning position and back again along a substantially horizontal axis. Preferably, two slide rails 14 are provided, which are arranged on both sides of the chute or the chute element 12.

It is likewise possible to move the chute or the chute element 12 by means of a portal construction arranged on one or both sides.

As previously stated with reference to FIG. 1, the chute element 12 may form an element of a composite chute 10. Likewise, that can

Fall shaft element 12 as such itself represent a chute. Also partial solutions are conceivable in which the chute can be opened along a preferably vertical parting line.

FIG. 3 schematically illustrates another example of a chute arrangement 20. In FIG. 3, the chute 12 is composed of two chute elements 12a, 12b. Similarly, for example, the figure 2 may be provided for moving in the form of a slide rail 14, on which a carriage 13 is slidably mounted. The chute element 12b is supported on the carriage 13. By means of a drive device (not shown), the carriage 13, and thus the chute element 12b (represented by dashed lines), can be moved from the working position into the cleaning position and back again along a substantially horizontal axis. In this way, the chute can be opened and both chute elements 12a, 12b are easily accessible from the side and can be easily cleaned.

It may also be provided that initially one of the chute elements 12a, 12b is moved into the cleaning position shown in FIG. 3, where it is cleaned and then moved back again. Then, the chute can be rotated by a corresponding angle, so that next the chute element 12a can be moved by means for moving to the cleaning position. In the cleaning position, therefore, the chute element 12a can now be cleaned in order finally to return the chute element 12a back to the operating position of the chute in order to resume operation of the gluing device.

Thus, individual elements of the chute can successively be cleaned successively in the cleaning position.

This can be particularly advantageous in devices and in fall wells, in which further facilities are provided within the chute, such as scrapers, which are attached, for example, to a centrally arranged axis of rotation and rotate about this. By moving a drop chute element by element into a cleaning position and cleaning it there, it is not necessary to separate the axis of rotation of the scraper device, and nevertheless to clean the chute at a staggered location or at the cleaning position so as to avoid contamination of the mixer. FIG. 4 schematically illustrates another example of a chute arrangement 20.

In FIG. 4, the chute element 12 is rotatably supported on a receptacle 16 about a substantially horizontal axis of rotation. The chute element 12 can therefore be adjusted between a substantially vertical orientation corresponding to the operating position, shown in phantom in FIG. 4, and an orientation inclined at an angle thereto, as the cleaning position, shown in FIG. 4 by solid lines. In the inclined orientation corresponding to the cleaning position, the inlet and the outlet of the chute element 12 are again not obstructed or impeded by other units of the gluing device, in particular a mixer or a discharge and / or metering device. The chute element 12 is therefore easily accessible, which greatly facilitates cleaning.

FIGS. 5a to 5c schematically illustrate yet another example of a chute arrangement 20. In this embodiment, the alternative use of a chute 10 instead of a chute element 12 is not lifted, but may be provided alternatively or in combination.

In the figure 5a, the chute element 12 is shown in the working position A.

Along the travel rail already described in detail cleaning position B (right) for cleaning the chute element 12 and additionally a waiting position C (left) for a replacement chute 18 for the case packer element 12 can be seen. The present embodiment assumes in the drawing that the

Ersatzfallschacht 18 not all possible features and / or

has high quality materials and only during the cleaning of the

Fall shaft element is used. Now, if a cleaning cycle is started, the chute element 12 moves from the working position A along the slide rail 14 by means of the carriage 13 in the cleaning position B, in which a collecting device 15 may be arranged to be cleaned automatically or manually. To minimize interruptions in production is separately or simultaneously the

Spare chute 18 shifted from a waiting position C to the working position A, preferably also along the slide rail 14 and by means of a carriage. The Drive problem is as previously not shown, since it is commercially available embodiments of the expert.

If the replacement chute 18 is in the working position A and the chute element 12 is in the cleaning position B (cf., FIG. 5b), the operation can be resumed during the cleaning of the chute element 12. In the present example as soon as possible after cleaning, preferably during a

Production interruption that occurs for other reasons (failure,

Product change) the replacement chute 18 again moved to the waiting position C, while the chute element 12 from the cleaning position B in the

Working position A changes. In Figure 5c would then again the preferred

Operating state reached when the high quality chute element 12 in

Working position A takes up his work, while in waiting position C the

Spare chute 18 is waiting for its next mission.

Alternatively, in waiting position C, a collecting device 15 may also be provided or the waiting position C may be equipped as a cleaning position B. This would correspond to a positional arrangement B-A-B instead of a positional arrangement C-A-B. This is particularly preferably implemented if the replacement chute corresponds in its properties and essential features to the chute element 12, and thus continuous interoperable operation is possible. This may be necessary in particular in extreme operating conditions (highly adhesive binder), which make a weekly or even daily cleaning necessary.

While in the foregoing various embodiments and examples

These are not limiting.

Thus, a chute can have more than two elements, such as annular segments of a chute or, for example, each as one of a plurality of side elements, such as wall elements of a polygonal chute.

Further, various of the described concepts may also be combined or applied side by side. Thus, for example, a chute element can be moved linearly into a cleaning position, while another chute element is pivoted about an axis. Likewise, a chute or chute member may be both linearly displaced and pivoted about a pivot axis to be moved to a cleaning position.

Preferably, the chute is tapered in the direction of the particle from top to bottom in cross section.

The chute can be cylindrical, conical, cube-shaped, regular or irregular polygon, or wedge-shaped.

The chute in the region of the inlet and in the region of the outlet have cross-sections of different shapes.

The outlet may also be associated with a closure piece 4 (see FIG. This serves to seal divisible chute elements with respect to the subsequent system parts or to prevent altogether during the cleaning that foreign materials in the subsequent system parts, in particular a mixing device 7, advised.

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

The chute can be designed in several parts, with a plurality of walls, each forming an inner wall of the chute. In particular, in this aspect, a cooling device can be realized.

The present invention is also conceivable for the wetting of other dissolvable or free-flowing particles, such as, for example, flour with water or starch, or the like. (1446) List of Reference P1446:

1 particle flow

2 metering device

3 dissolution device

4 stopper

5 particle curtain

6 nozzle

7 mixing device

8 mixing tool

9 wave

10 downpipe arrangement

1 1 chute element

12 chute element

12a, 12b chute element

13 sleds

14 slide rail

15 collecting device

16 recording

18 spare chute

20 drop shaft arrangement

A working position

B cleaning position

C waiting position

Claims

claims

1. chute arrangement, in particular for a device for gluing of particles, which consist at least partially of suitable for the production of material plates fibers and / or chips, wherein the chute assembly has a chute (10), dad urch characterized in that the chute assembly (20) on a device for moving the

Has a chute (10) and / or a chute element (11, 12) between a working position and a cleaning position.

2. chute arrangement according to claim 1, characterized in that the means for moving the chute (10) and / or a chute element (11, 12) is arranged, a pivoting of the chute (10) and / or the chute element (11, 12) to execute a pivot axis.

3. chute arrangement according to claim 1, characterized in that the means (13, 14) for moving the chute (10) and / or a chute element (11, 12) is arranged, a displacement of the

Fall chute (10) and / or the chute element (11, 12) along a track to execute.

4. chute arrangement according to one of claims 1 to 3, d a d u r c h

gekennzeich net that the means for moving the chute (10) or at least one chute element (11, 12) comprises a carriage (13), a slide rail (14) and / or a receptacle (16).

5. chute assembly according to claim 1, further comprising a

Collecting device (15) for collecting, wherein the collecting device (15) below the chute (10) or the chute element (11, 12) is arranged in the cleaning position.

6. chute assembly according to claim 1, characterized in that a replacement chute (18) or at least one spare chute element is arranged, which is or is suitable to take over the function of the first chute (10) or the chute element (11, 12) and preferably from a waiting position (C) in the working position (A) is movable while the first chute (10) or the chute element (11, 12) in the

Cleaning position (B) is moved for cleaning.

7. chute assembly according to claim 1, characterized in that the replacement chute (18) or the replacement chute element is suitable as a full replacement or only for short-term use.

8. Device for gluing particles, at least partially from the

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

A chute assembly (20) according to any one of the preceding claims.

9. The apparatus of claim 8, further comprising

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

a plurality of nozzles (6) for dispensing a binder, wherein the nozzles are arranged in an area within the chute (10) and / or above an inlet opening of the chute (10).

10. Apparatus according to claim 8 or 9, further comprising one of the chute (10) or one of the chute assembly (20) downstream mixing device (7).

11. The apparatus of claim 8, further comprising a replacement chute (18) or replacement chute element, which is suitable to replace the chute (10) or the chute element (11, 12) short or long term.

12. A method for cleaning a chute (10), in particular a

Falling shaft (10) of a device for the gluing of particles (1), which consist at least partly of fibers and / or chips suitable for producing material plates, comprising the steps:

Moving the chute (10) or a chute element (11, 12) from a working position to a cleaning position; and Cleaning the chute (10) or the chute element (11, 12) in the cleaning position.

13. The method of claim 12, further comprising the step of collecting from the chute (10) or the chute element (11, 12) in the

Cleaning position exiting detergent with a catcher (15).

14. The method according to claim 12 or 13, characterized in that in the step of moving a pivoting of the chute (10) and / or the chute element (11, 12) about a pivot axis or a displacement of the chute (10) and / or Fall shaft element (11, 12) along a track axis is executed.

15. The method according to claim 12, characterized in that a replacement chute (18) or a replacement chute element from a waiting position (C) in the working position (A) is movable while the chute (10) or a chute element (11, 12) in the cleaning position (B) is cleaned.