EP2136967A2

EP2136967A2 - Troughed belt conveyor arrangement

Info

Publication number: EP2136967A2
Application number: EP08749108A
Authority: EP
Inventors: Matthias Rösler
Original assignee: Roesler Holding GmbH
Current assignee: Roesler Holding GmbH
Priority date: 2007-04-24
Filing date: 2008-04-24
Publication date: 2009-12-30
Also published as: WO2008128777A3; WO2008128777A2

Abstract

The invention relates to a belt finisher installation comprising an endless belt guided around at least two deflection rollers and forming a cavity which extends transversely to a belt conveyor direction defined by the deflection rollers. Said cavity is filled with lubricant, and a drive is provided for at least one of the deflection rollers.

Description

Tumble belt arrangement

The present invention relates to a troughed belt assembly for a blasting machine or a vibratory finishing machine and a method for vibratory finishing for all known vibratory finishing processes, such as e.g. Deburring, grinding, polishing, cleaning, descaling, degreasing, degreasing, etc. and blasting of workpieces for all known blasting processes, in particular for cleaning, matting, deburring, descaling, paint stripping, roughening, surface finishing and solidifying.

Blast machines and vibratory finishing machines are basically known and have proven themselves. However, known vibratory finishing machines are not equally suitable for all types of workpieces. Thus, for example, for the grinding of sensitive workpieces made of wood, such as furniture, special equipment required that are relatively complex and therefore expensive.

It is the object of the present invention to provide an apparatus and method for vibratory finishing, with which a variety of grinding tasks or beam tasks can be solved in a cost effective manner.

The solution of this object is achieved by the features of the independent claims.

A troughed belt arrangement according to the invention comprises an endless belt formed, in particular, of sheet material, which is at least two Deflection rollers is guided and forms a trough which extends transversely to a defined by the deflection rollers belt conveying direction, wherein for at least one of the deflection rollers, a drive is provided. Grinding may be accomplished by relative movement between the in-trough abrasive and the workpiece.

Advantageous embodiments of the invention are described in the description, the drawings and the subclaims.

The troughed belt arrangement according to the invention is suitable both for wet operation and for dry operation, wherein, for example, grinding bodies made of ceramic, steel, glass, plastic or even wood can be used in dry operation as abrasives. To remove the resulting abrasion, a suction device with filter technology can be provided, which is preferably designed such that the entire working space in which the system is located is included. The working space can be closed by appropriate doors.

In wet operation can preferably from above the working space over the entire useful length of the system for uniform wetting the

Workpieces be provided a liquid supply spray bar. In this case, the abrasive may comprise water with special cleaning additives (compounds), in which case the endless belt may have recesses or perforations in order to discharge the process water constantly, together with the abrasive abrasion of the workpiece and abrasive bodies. The liquid supply can be done in this case via a finely adjustable metering device comprising a controllable water supply and a controllable detergent supply with monitoring devices. In this case, it is possible to use the process fluid in the circulation or by damming the process fluid to provide a batch operation. Alternatively, the trough band arrangement can be used to blast workpieces.

It may be advantageous if the endless belt has catches in order to achieve an improved circulation of the workpieces within the trough.

According to a further advantageous embodiment of the invention, the endless belt may be formed from flat strip material. Also, the endless belt may include transport means to abrasives and / or

To convey workpieces from one end of the trough to the other end of the trough. Such means of transport may be formed, for example, by helically formed or arranged driver. It is also possible to effect the transport by an inclination of the trough band, as is basically known from the prior art.

According to a further advantageous embodiment, a pressure plate may be disposed on the abrasive disposed within the trough to prevent the floating of workpieces. Such a pressure plate may in particular be configured flexibly and consist for example of elastic rubber or polyurethane. The pressure plate is preferably loosely on the abrasive and can be additionally held on a stationary fixation. If the pressure plate is flexible, it can adapt to the surface shape of the abrasive in the trough.

Furthermore, it may be advantageous to provide for mounting workpieces in the trough rotating or fixed (stationary) recordings. The drive can be arranged outside the trough in this case. According to a further advantageous embodiment, at least one deflection roller relative to the other deflection roller can be adjusted or pivoted. This makes it possible to tilt the trough in total about a horizontal axis, so that the angle of repose of the located within the trough abrasive or located within the trough workpieces can be varied. When providing one driven and two non-driven deflecting rollers, for example, the two non-driven deflecting rollers can be pivoted relative to the driven deflecting roller so that all three deflecting rollers maintain their mutual spacing.

According to a further advantageous embodiment, all pulleys can be mounted immovably in a housing, wherein the housing is pivotally mounted about a horizontal axis on a base frame and with the aid of a drive so pivotable about the axis that located in the trough workpieces through an access opening the trough or can be dumped out of the housing. In this embodiment, the trough can be emptied particularly effectively and quickly without the moving parts of the multi-band arrangement, i. the pulleys and the trough band must be adjusted. It may be advantageous in this case if the axis about which the housing is pivoted extends approximately coaxially or coaxially with respect to a rotation axis of a deflection roller, in particular a lower deflection roller provided in the region of the access opening, since there

Fall the pivot radius, which is required to empty the trough is minimized.

According to a further advantageous embodiment, the trough can be attached to at least one or both end faces by a closing element. bordered, which serves as a guide for the endless belt, and in particular is in sealed engagement with the endless belt. In this way, process fluid can accumulate within the trough, which may be advantageous in certain abrasive applications.

In this context, it may also be advantageous if the closure member has one or more screened flow openings spaced from the endless belt. In this way, a trough with a maximum filling level can be formed within the trough.

According to another aspect of the present invention, there is provided a method of slide grinding a plurality of workpieces, the workpieces being placed in a trough formed by an endless belt guided around at least two diverting pulleys, the trough extending transversely of one another extends through the pulleys defined belt conveying direction. According to the invention, only the workpieces without abrasive body can be placed in the trough, wherein the endless belt is driven until the workpieces located in the trough are deburred, ground and / or polished solely by circulating the workpieces within themselves within the trough become. It has been found that for certain workpieces that can be processed as bulk material, sufficient grinding can be achieved solely by circulating the workpieces in themselves. Such a method is extremely inexpensive and can be carried out with a belt-sliding joint of the type described above, but no grinding wheels must be placed in the trough. According to a further aspect, the invention relates to a method for vibratory finishing, wherein an endless belt is provided, which is guided around at least two deflection rollers and forms a trough which extends transversely to a band conveying direction defined by the deflection rollers. Here, the workpiece is placed together with abrasive, such as abrasive, in the trough and the endless belt is driven until the workpiece located in the trough is deburred, ground and / or polished.

Such a method is particularly suitable for grinding sensitive workpieces, for example of wood material and concretely for grinding chairs made of wood, in which a lacquer intermediate grinding must be provided. In this case, the workpiece without holding device is preferably loosely placed in the trough together with the abrasive, after, for example, the first basecoat layer has been applied to the piece of furniture. By the subsequent grinding wood fibers that have been set up during the painting, flattened or removed, in which case preferably abrasive articles made of plastic or wood are used.

The method last described is also suitable for a raw wood cut to round off raw wood structures and individual parts as the basis for a subsequent assembly or painting on the edges. For this purpose, the wood parts together with grinding wheels and possibly liquid additives are added loosely into the trough without additional tensioning or holding devices and subjected to a common circulation movement by the belt being driven in such a way that the trough contents are circulated in themselves. Here, the resulting relative movement between the grinding wheels and the workpiece causes the desired surface processing and, depending on the application, an edge rounding on the workpiece. Alternatively, drum-capable workpiece geometries, such as building bricks, figures and the like, can also be machined on their own or with the addition of loose-sanding agents.

The grinding process preferably takes place dry in this application, with dust residues can be removed via suction from the work area.

According to a further advantageous embodiment, the grinding method according to the invention can also be carried out in a continuous system or the strip-sliding grinding system according to the invention can be designed as a continuous system. For this it is advantageous if the working space, i. the trough is formed in a length of about 4 to 6 meters, so that the workpieces in a loading zone by suitable handling equipment continuously or intermittently at one end of the

Trough can be entered in this. During the grinding process then pass through the workpieces together with the grinding bodies, the trough by suitable transport devices. At the end of the conveyor system, a workpiece separating zone is then provided, in which the grinding bodies are continuously returned to the input zone via a conveyor belt, a vibrating conveyor, a conveyor spiral or a screw or the like.

Furthermore, it may be advantageous for certain workpieces to divide the trough by one or more separating elements into chambers which are arranged side by side along a straight line extending transversely to the belt conveying direction, so that, for example, a workpiece is entered into each chamber. The dividing elements may be stationary, ie stationary, or rotating or with the trough strip encircling. In this embodiment, therefore, the use of a proposed in at least two chambers divided trough. In the subdivision according to the invention running, wear-resistant or wear-resistant separating elements are used, wherein the chambers formed by the separating elements of the trough may each have the same or different clearances.

Furthermore, the workpieces can be fed separately to the individual chambers of the trough via feed belts, so that in the trough radius (enveloping circle) individual parts are always rotated and turned over from one another without contact. The separating elements thus enable non-contact, damage-free blasting or grinding of the individual workpieces running side by side.

The advantages of the separators are versatile. Thus, a contact and damage to the workpieces with each other by processing in each case individual chambers of the trough is completely excluded. Delicate workpieces do not have to be plugged in, twisted or turned over expensive handling systems.

Expensive workpiece hanger, different shots and fixtures can be completely eliminated. Due to the absolutely free movement of the individual workpieces in the chamber beam blasting can also be excluded when blasting.

In addition, all imaginable workpieces that are cleaned, hardened, descaled, descaled, and all over the world can be cleaned can also be deburred, edited; provided the clear width of the individual chambers was chosen correctly.

The part weight can be here 30 kg and more. A laborious manual attachment, as with the overhead conveyor blasting system, is not necessary.

Hereinafter, the present invention will be described purely by way of example with reference to an advantageous embodiment and with reference to the figures. Show it:

FIG. 1 is a plan view of one of the troughed belt arrangement; FIG.

2 shows an embodiment of a separating element;

3 shows a side view of a troughed belt blasting system; 3a shows a front view of the troughed belt blasting system of Fig. 3;

A plan view of a Muldenband- beam system with

Spinning wheels, which are arranged horizontally on the cabin roof in this embodiment;

4a shows a side view of the troughed belt blasting installation according to FIG. 4; Fig.5 a troughed belt blasting machine;

5a shows the troughed belt blasting installation according to FIG.

FIG. 6 shows a troughed belt blasting installation with feed belts; FIG.

6a shows the troughed belt blasting installation according to FIG. 6 in perspective view

View; 7 shows a formation of a trough strip; FIG. 8 shows a sectional view through a belt-sliding grinding system with a trough band arrangement; FIG. and FIG. 9 shows a further embodiment of a belt slide grinding system.

As can be seen from FIG. 1, separating elements 1 running in a preferred embodiment determine the respective trough radius or enveloping circle. These can preferably spring-loaded from above a trough band 3 down. The trough radius or the diameter of the separating elements 1 should have at least the size of the diagonal dimension of the workpieces to be radiated. Here, the trough band 3 wraps around a little more than half the circumference of the separating elements. 1

In the case of a design with a fixed separating element 1, deflection pulleys located on the edge of the trough and enveloped by the trough strip 3 determine the trough radius or enveloping circle.

Revolving separating elements 1 preferably rotate at the same speed as the trough belt 3 and are driven or rotated via the trough belt 3. In this case, the separating element 1 is mounted in a dust-tight manner with a certain spring preload and pressed onto the trough strip 3 via a receptacle 8 screwed on in the car roof 7; see Fig. 4

The embodiment of the separating element 1 is workpiece-dependent, running or stationary. In a processing (for example, the blasting of rims), a fixed separating element 1 can ensure that the driven over the troughed belt 3 and rotating rim can not fall over. The separating elements 1 may have one or more cutting discs 2, which - as shown in FIG. 2 - in a preferred embodiment of a wear-resistant steel wire mesh 9 (eg made of manganese steel), and beyond with a circumferential wedge profile 10 may be equipped. In a further embodiment, the separating elements 1 may also have other separating layers, for example of sheet metal or foil. The circumferential wedge profile 10 on the separating element 1 ensures that workpieces which run against a separating element 1 or a separating disk 2 are deflected and are always guided back to the center of the chamber 5.

In one embodiment, the blasting process can take place via jet nozzles (pressure jet or injector jet nozzles) 12 from above; see Figs. 3 and 3a. In this case, the jet nozzles 12 are clamped in nozzle holding devices 13 and if necessary also moved or oscillated and pivoted.

As shown in FIGS. 4 and 4 a, the blasting process can furthermore take place with blast wheels 14, which are placed from above on the canopy 7. The fast and large-scale machining of many workpieces in a short time with low energy consumption is a significant advantage of this blast wheel principle. Here, the spinner wheels 14 normally sit horizontally on the cabin roof 7. The arrangement of the spinner wheels 14 is designed so that one or more chambers 5 are irradiated with an impeller 14 at an angle of approximately 90 degrees to Muldenband- movement. For horizontally seated blasting wheels 14, channeling of the blasting cone into the trough band radius via laterally standing wear-resistant steel plates or the like can ensure better centering and channeling (also higher blasting power). The channeling should center (channelize) the stray abrasive. The overall spray pattern (so-called hot spot) is clearly delimited here, which ensures less wear on the cabin walls and higher efficiency of the jet power.

As FIG. 5 shows, the spinner wheels 14 can furthermore also be arranged vertically on the car roof 7 and radiate linearly with respect to the running direction of the trough belt 3. Each individual chamber 5 is supplied by a blast wheel 14, which is directed exactly with its hot spot in the trough radius. In this embodiment, the spinners 14 may be individually driven directly or driven indirectly via a central motor.

The blast wheels can continue to be arranged application-related not only vertically or horizontally on the cab roof 7, but also laterally - similar to a saddle roof - obliquely from above for a sufficient charisma, for example in rim processing, provide. In this embodiment, the blast wheels are directed approximately 45 degrees from above onto the side surfaces left / right of the rotating rim.

In order to keep the workpieces as limited as possible in the trough radius, so that they can only move freely there and are rotated, wear-resistant limiters can be used for specific parts. These limiters prevent the workpieces from being carried too far upwards by the trough band 3 and possibly the carriers 17 (FIG. 7) or when rolling too far forward. This is a simple wearing part that can only be hung on and held sideways from above via a bracket.

The feed of the system takes place in a preferred embodiment via feed belts 11 (see FIGS. 5 and 6), which individually enter the workpieces into the chambers 5 of the trough 2 via a transfer chute 15. The troughed belt blasting system can be opened via a sliding door.

In accordance with the method, the workpieces running in the individual tracks of the feed belts 11 are preferably fed to the blasting machine (one workpiece per track at each cycle). The gate lift closes after entering the blanks. The blasting process begins.

After completion of the blasting time, the blasting agent supply is preferably interrupted by flat slide (shell slide), the sliding door is opened, the trough belt 3 runs against the direction and gives the workpieces to the outside on an underlying transfer chute 16 and on a clocked, in succession conveyor belt 18 from. The upper transfer chute 15 folds down, the blank feed belt leads to a new workpiece. The trough belt 3 promotes in the running direction (inwards), the transfer chute 15 folds back, the door closes, the blasting process starts again, etc. During the entire process, the blast wheels can continue to run. When using an aggressive blasting abrasive, which would cause a higher wear on the troughed belt 3, can be achieved via a profiled trough belt 3, in which the blasting agent flow is increased through holes that forms a blasting medium bed. This blasting bed, which completely covers the trough radius, ensures that the blasting medium is slowed down and, in turn, minimizes wear on the trough strip 3. In this embodiment, according to the method, a predetermined amount of blasting agent is separately added to the trough 4 via a shell slide from above At the beginning of the blasting process, a blasting medium bed protects the recess 4.

For an improved workpiece transport and for a uniform workpiece movement or rotation, as shown in FIG. 7, laterally offset, semicircular or wedge-shaped running (vulcanized) driver 17 placed on the trough band 3 can be arranged.

The advantages resulting from the illustrated embodiments of the troughed belt blasting system according to the invention over the existing systems are shown below:

Due to its special design, the system offers a linking possibility with pre and post processes; Here, workpieces can be fed fully automatically via simple buffer storage tapes clocked the blasting system. This can be done in one or more lanes. A high degree of process reliability and gentle transfer is ensured by low drop stages and short transfer chutes (15, 16) - as shown in FIG. The delivery of finished parts takes place in the same way only on the underlying buffer and storage tape. Of Furthermore, the blasting system in the loading area does not present any sources of danger that are always to be accepted, for example, in the case of turning and pivoting movements by handling devices.

Uniform distribution of geometrically demanding workpieces is always guaranteed since they are rotated by a beam angle. The movement can be supported by means of a trough belt designed for this purpose.

The capacity of an example of a 2 m wide system and a workpiece dimension of 100 x 100 mm allows ten workpieces to radiate parallel to each other without contact. The beam time is for example 15 seconds. Added to this is loading and unloading with 6 seconds each. The total time is thus 27 seconds. This again corresponds to 2 batches per minute = 20 parts per minute. In three-shift operation, this corresponds to a partial quantity of 28,800 pieces per day. Even if the blasting and non-productive times are doubled, there are still some 14,400 workpieces per day.

Due to the simple charging by means of storage and buffer belts, the troughed belt blasting system according to the invention is at no time bound to a working force. Parts can be buffered in large quantities, the system works off the goods independently, or the pre- and post-processes are linked together. Due to the quick and easy part input, extremely short non-productive times are the consequence and these have a positive effect on the operating costs in machine economy calculations.

The blasting system is small and compact and offers the user every conceivable linking possibility with other processes.

Since the blasting machine has no inlet and outlet openings with curtains, this is hermetically shielded during the blasting process to the outside. A discharge of blasting agent and dust is thus reduced to a minimum.

Through a possible caster in the trough without blasting shot the workpiece is rid of the blasting media on all sides, since the trough 4 rotates and turns it in all directions. In addition, discharge nozzles can take on additional tasks that may be necessary. The carryover of blasting media via finished parts is thus reduced to a minimum.

A conversion of the trough 4 in large and small chambers 5 is possible at any time, so that the requirement of different workpiece sizes can be influenced at any time.

FIG. 8 shows a trough band arrangement used in a belt-sliding grinding system. 8 has a base frame 100, on which a total of three parallel pulleys 120, 140 and 160 are rotatably mounted, wherein the pulleys are arranged horizontally. An endless belt 180 is guided around the deflection rollers 120, 140 and 160 such that it forms a trough 200 which extends transversely to a belt conveying direction which is defined by the deflection rollers. In other words, the trough extends perpendicular to the plane of the drawing. The right lower deflecting roller 120 in FIG. 8 is provided with a drive 220, so that the endless belt 180 can be rotated in and against the direction of the arrow B in rotation.

In order to ensure a constant belt tension, a pressure roller 145 can be provided between the deflection roller 140 and the deflection roller 160 or at another suitable location, which can be adjusted against the endless belt 180 via a spring or an automatically or manually adjustable adjusting mechanism. In this way, can be maintained at a lengthening or shortening of the endless belt 180 a desired belt tension.

Furthermore, the figure shows that the trough 200 is delimited at its two end faces by a rotating hub 240, which serves for the lateral guidance of the endless belt 180 and laterally delimits the working space within the trough. The turntable is in sealed engagement with the endless belt, which is made of rubber-like material.

On the underside of the trough 200, three support rollers 260, 280, 300 are provided for guiding the endless belt 180, which are arranged parallel to the deflection rollers 120, 140 and 160. Above the trough 200 there is provided a spray bar 320 extending in the longitudinal direction of the trough, with which liquid abrasive can be applied to the workpieces or grinding bodies located inside the trough.

Finally, the trough 200 is filled with abrasive 340, which includes abrasive in the illustrated embodiment. By driving the endless belt 180 in the operating direction B, the grinding bodies 340 located inside the trough 200 are circulated, so that a workpiece located within the grinding body or several workpieces located within the grinding body are processed. By reversing the drive direction of the endless belt 180, the abrasive bodies and workpieces can be removed from the trough as needed.

As a material for the endless belt 180 are rubbery materials or materials made of polyurethane or with a coating of such materials. It is also possible to form the endless band of metal or metal lamellae. The band may be perforated or slotted, whereby the Umwälzver- behavior of the introduced contents can be optimized by Mitnehmerstollen. Also, a textured surface of the endless belt can reduce a tendency of the filling material to adhere to the belt. The drive of the endless belt 180 is preferably carried out by means of a geared motor, a variable speed gear or continuously via frequency converter.

The loading and unloading of the workpieces or of the entire working space preferably takes place via a front door 360. However, it is also possible to load through the top of the system. The loading can be done with both stationary and slowly rotating work movement take place, with handling equipment such as tilting devices, belts, buffer channels or handling robots are advantageously used.

For a parts separation in two-batch operation, by reversing the strip running direction from the machining direction to an unloading direction, the contents can be placed on a buffer line which absorbs the total volume. Immediately thereafter, the system can be loaded with the second batch comprising grinding wheels and workpieces, whereby processing can begin at this point in time. The precursor batch located in the buffer area can now be dispensed parallel to the parts processing to a subsequent vibrating screen machine, if necessary with a magnetic separation device for separation. Alternatively, the contents can be transferred directly to a screening machine without intermediate buffer. The sieved abrasive batch can be returned to the workspace automatically via a tilting device or similar feeding devices.

Furthermore, it is possible to connect a workpiece separation with an attached abrasive separating device with an attached separating device. To unload the contents, comprising grinding wheels and workpieces, the strip running direction is switched to unloading. By means of an interval-controlled belt run, in each case a small, processable filling material quantity can then be passed on to the sieving station. There, a vibrating screen or a magnetic separator separates the grinding wheels from the workpieces. At the same time, there can be an undersize separation for abrasive material that has become too small. The still usable grinding wheels are taken over the entire separating process in the collecting area of the storage buffer. For reloading with sanding bodies, the entire separating unit can be moved across the work area of the be pivoted so that the abrasive particles are discharged automatically.

Fig. 9 shows another embodiment of a troughed belt assembly disposed in a vibratory finishing machine, the troughed belt assembly used being similar to that of Fig. 8.

The vibratory finishing system shown in Fig. 9 comprises a base frame 50, on which two vertically upwardly extending bracket 52 and 54 are arranged, at the free ends of a housing 56 is pivotally mounted, in which a trough band assembly is located. The troughed belt arrangement arranged in the housing 56 in turn has an endless belt 58 which is guided around a total of three deflection rollers and forms a trough 60 which extends transversely to a belt conveyor direction defined by the deflection rollers.

In this embodiment, the rear, lower deflection roller is driven by a drive 62. The endless belt 58 runs, similar to the embodiment of FIG. 8, around the lower deflection roller driven by the drive 62, about an upper deflection roller arranged above it, of which a bearing 64 can be seen, and about the front lower deflection roller about its bearing 66 in Fig. 9 is also visible.

The trough 60 is bounded at its two end faces by a turntable 68, which serves in each case as a guide for the existing of rubber-like material endless belt 58 and which is in each case in sealed engagement with the endless belt. Turntables 68 may be metal discs. It is also possible that the turntables are provided on their outer circumference with a sealing device. In both turntables is at a distance to the trough band 58, ie a Ra Dius, which is smaller than the radius of the hub 68, a plurality of DurchΩ openings 70 are provided, which may be preferably provided with a sieve 72.

As shown in FIG. 9 also shows, the entire housing 56 is pivotable with all its components about a horizontal axis, said horizontal pivot axis in the preferred embodiment is coaxial with the axis of rotation of the front lower pulley. With the help of two lifting cylinders 74 and 76, the housing can be pivoted from its normal position to an unloading position in which workpieces located in the trough 60 can be tipped out of it. 9 shows an intermediate position between the normal position, in which the lower housing surface extends essentially horizontally, and an unloading position, in which all workpieces can be tilted out of the open access opening, which can be seen in FIG. The access opening can be closed in the embodiment of FIG. 9 by a likewise cylinder-operated pivoting door 78.

LIST OF REFERENCE NUMBERS

1 separating element or compartment divider

2 cutting discs

3 trough belt or endless belt

4 trough

5 chamber

6 pulleys

7 cabin roof

8 Recording in the cabin roof

9 steel wire mesh

10 spline profile

11 feed belts

12 jet nozzles

13 nozzle holders

14 spinners

15 upper transfer chute

16 lower transfer chute

17 drivers

18 conveyor belt

50 base frame

52, 54 bracket

56 housing

58 endless belt

60 trough

62 drive

64 bearings

66 bearings

68 turntable 70 flow opening

72 sieve

74, 76 lifting cylinder

78 swinging door

100 base frame

120, 140 pulleys

145 pinch roller

160 deflection roller 180 endless belt

200 trough

240 turntable

260, 280,

300 support rollers 320 spray bar

340 abrasives

360 front door

B direction of rotation

Claims

Sponsor claims

1. Muldenbandanordnung for a blasting or vibratory finishing machine, comprising a formed in particular of sheet material endless belt which is guided around at least two pulleys and forms a trough which extends transversely to a defined by the pulleys Bandför- device direction, and a drive for at least one the pulleys.

2. troughed belt assembly according to claim 1, characterized in that the trough is delimited at least one end face by a closing element which serves as a guide for the endless belt and which is in sealed engagement with the endless belt.

3. troughed belt arrangement according to claim 1 or 2, characterized in that the trough is delimited at least one end face by a closing element which has at least one in particular provided with a sieve flow opening, which is spaced from the endless belt.

4. Muldenbandanordnung according to at least one of the preceding claims, characterized in that the endless belt has openings.

5. troughed belt assembly according to at least one of the preceding claims, characterized in that it is arranged in a housing with an access opening, wherein the housing is pivotally mounted about a horizontal axis on a base frame and by means of a drive so pivotable about the axis that in the trough located workpieces can be dumped out of the access opening from this.

6. troughed belt assembly according to claim 5, characterized in that the axis extends approximately coaxially to a rotational axis of a deflection roller.

7. troughed belt assembly according to at least one of the preceding claims, characterized in that for the attachment of workpieces in the trough at least one in particular rotating driven recording is provided.

8. troughed belt assembly according to at least one of the preceding claims, characterized in that in the trough an abrasive is provided, on which in particular a pressure plate is arranged.

9. Muldenbandanordnung according to at least one of the preceding claims, characterized in that the trough is divided by at least one separating element into a plurality of chambers, which are arranged in particular side by side along a direction transverse to the belt conveying direction straight lines, wherein the separating element is formed with the troughed belt or running stationary ,

10. troughed belt arrangement according to at least one of the preceding claims, characterized in that at least one running with the troughed belt separating element is provided which preferably spring-loaded from above the troughed belt down.

11. Troughed belt arrangement according to one of the preceding claims 9 or 10, characterized in that the separating element has a circumferential wedge profile.

12. troughed belt assembly according to at least one of the preceding claims 1- 11, characterized in that it is arranged in a blasting machine.

13. Muldenbandanordnung according to at least one of the preceding claims 1- 11, characterized in that it is arranged in a vibratory finishing.

14. A method for vibratory finishing of at least one workpiece made of wood material, in particular a piece of furniture, in particular with a trough band arrangement according to at least one of the preceding claims, wherein an endless belt is provided, which is guided around at least two deflection rollers and forms a trough which transversely extends to a defined by the pulleys belt conveyor direction, - the workpiece together with abrasive, in particular

Grinding is placed in the trough, and the endless belt is driven until the workpiece located in the trough is deburred, ground and / or polished.

15. The method according to claim 14, characterized in that the workpiece without holding device together with the abrasive is loosely placed in the trough.