EP3178605A1 - Device for post-processing at least one disc-shaped workpiece - Google Patents

Abstract

The invention relates to a device (1) for finishing at least one plate-shaped workpiece (2) which is provided on at least one narrow side (3) with an edge band (4), wherein the device (1) in one of the workpiece (2) in the flow processing machine (5) and viewed in the direction of passage (6) following to a transverse to the longitudinal extent of the edge strip (4) existing overhang of the edge strip (4) abortenden chip tool (7) of the machine (5) can be arranged, characterized in that the device (1) at least one brushing unit (8) with at least one brushing tool (9) and at least one fluid application device (27), wherein the brushing tool (9) has at least one brush belt (14), wherein the brush belt (14) has a straight contact area (30) and at least one curvature region (31) and wherein the fluid application device (27) has at least one nozzle (28), which vorges for discharging a treatment fluid (29) marriage and is set up.

Description

The present invention relates to a device for finishing at least one plate-shaped workpiece, which is provided on at least one narrow side with an edge band, a method for processing at least one plate-shaped workpiece in the passage and a use of at least one brushing unit with at least one brushing tool for removing a release agent of at least a broad side of a plate-shaped workpiece or of an edge band attached to at least one narrow side of the workpiece.

It is known that furniture panels made of wood or a wood material edge side or on its narrow side with a so-called edge band are coated. This is done in modern furniture manufacturing companies usually by means of at least one furniture plate in the processing machine. Such machines are also referred to as a continuous machine and / or edge banding machine. Within this machine, the furniture panel is moved, for example by means of at least one conveyor belt (continuously) progressively from one processing station to the next. Thus, the furniture panel passes through the machine.

The edge band also serves in particular to improve the appearance of the furniture panel and hereby complements the regularly existing on the upper and / or lower broad side of the furniture panel decorative layer. In addition, the wooden core of the furniture panel is protected by the edge band and decorative layers. The edge band is usually made of polishable plastic, such. As acrylic or the like and can be tackified at least on one side by a thermal treatment, wherein the thermal treatment, for example, by means of at least one laser beam or by means of plasma jets. alternative or cumulatively, an adhesive may be applied to the edge band and / or the narrow side of the furniture panel prior to application.

When attaching the edge band or when coating the narrow side of the furniture panel with the edge band, however, it should be prevented that the decor layer already present on the underside and / or top broad side of the furniture panel is damaged and / or permanently contaminated. Care must be taken in this connection, in particular, that adhesive residues and / or material emerging from the adhesive joint between edge band and furniture panel (adhesive and / or liquefied or molten plastic) can not permanently adhere to the decorative layer (s) ,

For this purpose, a release agent is applied at least to portions of the lower and / or upper side broad side of the furniture panel usually at the beginning of the manufacturing process. In this case, the release agent is applied at least in an edge region of the broad side which is assigned to the edge band to be attached, in order to prevent adhesion of adhesive in this marginal side region of the broad side. Here, particularly good results could be achieved with release agents that adhere relatively strongly or firmly to the surface of the furniture panel.

In connection with such release agents, however, there is the problem that these, due to their strong or firm adhesion to the surface of the furniture panel, then difficult to be removed from this again. However, a complete removal is desirable and requires by conventional means a lot of time, especially if the furniture panel has to be cleaned again by hand because of still adhering release agent.

In addition, when attaching the edge band to the narrow side of the furniture panel to take into account that these workpieces usually certain unevenness, so-called thickness tolerances have. Because of these thickness tolerances of a respective furniture panel, the width of the edge band to be attached can not be adapted from the outset exactly to the thickness or height of the furniture panel. Rather, the edge band is regularly first provided with a transversely to the longitudinal extent of the edge strip provided supernatant on the narrow side of the furniture panel so that the top side and / or underside of the furniture panel after sticking the edge band remains a certain supernatant to always complete coverage of the plate edge or the Narrow side of the furniture panel to ensure.

This supernatant must then be removed in a subsequent processing step. For this purpose, usually suitable chip tools, such as cutters, scrapers or the like are used. However, these cutting tools can affect or damage the visible surface of the edge band. As a result of the cutting removal, it may, for. B. come to an increased surface roughness and / or matting of the visible surface of the edgeband. Therefore, a further processing step should follow the cutting removal, which processes the visible surface of the edge band again in accordance with the optical requirements for a defect-free and / or glossy surface of the edge band.

On this basis, it is an object of the present invention, at least partially solve the problems described with reference to the prior art. In particular, at least one device, a method and a use are to be specified, each of which enables the most efficient, cost-effective, mechanical and / or preferably complete removal of a release agent from a piece of furniture. In addition, at least the device, the Method and / or the use also to be suitable, in addition to and / or at the same time to remove the release agent to edit at least a portion of the visible surface of the edgeband, in particular to polish.

These objects are achieved with a device according to the features of patent claim 1, a method according to the features of patent claim 7, a method according to the features of patent claim 8 and a use according to the features of claim 10. Further advantageous embodiments of the solution proposed here are in specified in the dependent claims. It should be noted that the features listed individually in the dependent claims can be combined with each other in any technologically meaningful manner and define further embodiments of the invention. In addition, the features specified in the claims are specified and explained in more detail in the description, wherein further preferred embodiments of the invention are shown.

Serves for this purpose a device for reworking at least one plate-shaped workpiece, in particular a furniture plate, which is provided or coated on at least one narrow side with an edge band. The device can be arranged or arranged, viewed in the direction of passage, in a machine that processes the workpiece in a continuous manner to a cutting tool of the machine, which can remove a protrusion of the edge strip present transversely to the longitudinal extent of the edge strip. The device has at least one brushing unit with at least one brushing tool and at least one fluid application device. The brushing tool has at least one brush belt. The brush belt has a straight contact area and at least one, in particular at least two or even (exactly) two, curvature area (s). The fluid applicator has at least one nozzle which is provided and arranged for discharging a treatment fluid.

Preferably, the treatment fluid comprises a cleaning agent and / or a polishing agent. Particularly preferably, the treatment fluid is substantially solvent-free and / or contains only very few, preferably none, volatile organic compounds (VOCs). In other words, the treatment fluid is formed such that it remains flowable for a certain time and / or for a certain distance, in particular under a (high) heat input due to friction between the brush belt and the workpiece.

The path may involve a distance along the circumference of the brush belt. Preferably, the distance is viewed in the circumferential direction of the brush belt, defined between an application point of the treatment fluid on the brush belt in the curvature region and a contact region end of the straight contact region. The cleaning agent preferably remains at least partially flowable along the path or over the path. In other words, this means, in particular, that the treatment fluid does not substantially (completely) evaporate over the path or as long as it traverses the path. Particularly preferably, the treatment fluid (or its liquid and / or volatile constituents) remains flowable over at least half of the path. Most preferably, the composition of the treatment fluid and the path are coordinated so that the treatment fluid (only) on reaching the end of the path (predominantly or even completely) is evaporated.

The present solution advantageously makes it possible to use substantially solvent-free treatment fluids and / or treatment fluids with only very few, preferably no, volatile organic compounds for processing or reworking a plate-shaped workpiece. In connection with such (solvent-free) treatment fluids is to be noted that they evaporate much slower than solvent-containing treatment fluids. In particular, when used with conventional circular polishing pads or polishing buffing was observed that solvent-free liquids are often not sufficiently evaporated during polishing and form undesirable residues on the surface to be processed. Such unwanted residues can be advantageously avoided with the solution proposed here.

If the treatment fluid comprises a cleaning agent, this can be provided or set up for the preferably complete removal of a release agent. The application of the cleaning agent to the workpiece by means of the device presented here is used in particular before or during a subsequent polishing step or before a downstream (second) device in which a polishing agent is applied to a (second) brush belt, a previously on the workpiece Remove applied release agent and / or glue residue from the workpiece. Particularly preferably, the cleaning agent (also) for cooling the edge band and / or the glue joint.

The cleaning agent preferably comprises at least ethanol, acetone or propan-2-ol (isopropanol). The cleaning agent is particularly preferably formed with a mixture comprising ethanol, acetone and propan-2-ol, it being possible for ethanol to form the largest proportion of the mixture. If the treatment fluid comprises a polishing agent, it may be designed and furnished for high-gloss production. The polishing agent may have a viscous or pasty consistency.

At least two of the devices presented here are preferably arranged behind one another in the direction of passage in a machine which processes the workpiece in a continuous operation arranged. In this case, a cleaning agent can be applied in a first device and a polishing agent can be applied to the brush belt in a second (subsequent) device. Thus, the devices can fulfill different functions, wherein by means of the first device a cleaning, in particular an at least partial removal of release agent, and by means of the second device can be carried out polishing certain areas of the workpiece.

Even if (only) a cleaning agent is applied to the brush belt, the (first) device presented here can already contribute to a surface improvement of a visible surface of the edge band and / or a decorative layer of the workpiece. The movement of the brush belt along the workpiece may in this case lead to a (first) leveling of unevennesses produced by the chip tool and / or to a (first) polishing of a visible surface of the edge band, in particular a radius of the edge band, to a surface (decorative layer) of the workpiece contribute. In a subsequent (second) device, when a polishing agent is applied to the (second) brush belt and / or when a polishing agent is applied to the (first) brush belt of the (first) device in addition to the cleaning agent or subsequently to the cleaning agent, the polishing agent may serve to polish a visible surface of the edge band, in particular a radius of the edge band towards a surface (decorative layer) of the workpiece, to a high gloss.

According to an advantageous embodiment, it is proposed that the nozzle of the fluid application device is held or fastened to the brushing unit. Preferably, the fluid application device is held or fastened to a cover of the brushing unit. The cover may be provided and configured to form a splash guard around the brush belt. Particularly preferably, the cover extends over at least a portion of the circumference of the Brush bands. The fluid application device preferably comprises a compressed-air connection and at least one treatment-fluid connection. In particular, the nozzle has at least one nozzle opening for discharging the treatment fluid. The treatment fluid is preferably discharged by means of a compressed air supplied to the nozzle. Particularly preferably, the fluid application device can be provided and configured to form an aerosol and discharge it through the nozzle.

Preferably, the fluid application device is associated with a metering device. The metering device can be connected upstream of the fluid application device or integrated into the fluid application device. Preferably, the metering device comprises at least one as needed controllable (metering) valve. The fluid application device or the metering device, the treatment fluid via a supply line, in particular pressure line, are supplied. The supply line may be connected to a reservoir for the treatment fluid. In the feed line a feed pump is arranged regularly. Preferably, the feed pump is inserted near the reservoir into the supply line.

The actuation of the fluid applicator or the control of the metering can be done electrically or pneumatically. Preferably, the fluid application device or the metering device is connected via a compressed air line to a compressed air source. The compressed air line can be connected to an electrically actuatable or controllable (metering) valve. For this purpose, an electrically actuated valve can be assigned or connected downstream of a compressed air input of the metering device or the through-air connection of the fluid application device. Preferably, the (metering) valve is integrated into the metering device.

The promotion of the polishing agent from the reservoir via the supply line, in particular via the pressure line, to the fluid applicator or metering out can also be done pneumatically. In this case, the reservoir can be pressurized with compressed air and connected to the compressed air line via a pressure regulator.

According to an advantageous embodiment, it is proposed that at least one nozzle opening of the nozzle is aligned towards the (or to one of) the curvature region (s) of the brush belt. Preferably, the nozzle is formed in the manner of a spray tube, in particular with at least one lateral nozzle opening. Particularly preferably, at least one nozzle opening is formed in a lateral surface of the spray tube and aligned towards the brush belt. Preferably, the nozzle, in particular the spray tube, spans at least a portion of a brush belt width of the brush belt.

The arrangement of the nozzle in the region of curvature has the particular advantage that the treatment fluid can also be introduced or penetrated into gaps between the bristles or bristle units of the brush belt. This can be done in an advantageous manner, a very good and intimate wetting of the bristles or bristle units. An application of the treatment fluid in the region of curvature thus makes it possible, in particular, for the wetting of the brush belt with the treatment fluid to be substantially or almost completely preserved in the circumferential direction of the brush belt between an application point in the region of curvature and a contact region beginning of the straight contact region of the brush belt. In other words, this means in particular that the application in the region of curvature helps to minimize or even avoid losses of the treatment fluid, so that treatment fluid can still be present on or in the brush belt towards the contact area end of the straight contact area. The arrangement of the nozzle in the area of curvature In particular, it can have the advantage that at least part of the treatment fluid is also delivered to the edge band, ie in particular also directly reaches the edge band and / or a gap between edge band and brush band (near the contact area of both).

According to an advantageous embodiment, it is proposed that the device comprises at least one adjusting device. The brushing unit is in this case by means of the adjusting device towards and away from the workpiece movable or deliverable.

Preferably, the device has two brushing units, each with a brushing tool. In addition, the brushing unit may also include a drive motor driving the brushing tool during operation. More preferably, the device has two adjusting devices, which are each associated with a brushing unit. The brushing tool is preferably a brush belt. Depending on the nature of the brush belt, d. H. For example, depending on the density of the bristles of the brush belt and / or depending on the material selection of bristles or brushes of the brush belt, the brush belt can be better suited for removing release agent and / or better for polishing the edge band.

The texture of the brush belt is preferably designed such that it is suitable and intended both for removing release agent and for polishing at least a portion of a visible surface of the edge band. In particular, the brushing tool is not a (pure) polishing brush, polishing buff, polishing pad, polishing belt, or the like. Such pure polishing tools are not suitable in particular for the efficient and complete removal of the release agent. Accordingly, the solution proposed here explicitly turns away from such pure polishing tools in particular. Preferably, the brushing tool, in particular the brush belt, a plurality of different bristles or bristle units, wherein a single bristle or bristle unit z.

B. is designed in the manner of a tab or a lamella and in the direction along the brushing tool several different lobes / lamellae (with respect to material, surface and / or rigidity) are provided one behind the other. The bristle units and / or lamellae preferably comprise at least one configuration from the following group: sisal fabric, felt, cotton fabric, fleece, cloth, leather and / or foam. Particular preference is provided between the bristle units or slats column. The bristles or bristle units are preferably arranged on a carrier tape.

Particularly preferably, the bristles or bristle units are glued to the carrier tape. The carrier tape can be advantageously formed with a toothed belt. The (inwardly facing) teeth of the toothed belt can engage for driving the brush belt in a corresponding tooth profile on the outer surface of a drive roller and / or a tensioning roller. If the carrier tape or the belt of the brush belt is designed as a toothed belt, this has the particular advantage that an unwanted slippage of the brush belt can be avoided, especially at low belt tension. Thus, the formation of the carrier tape as a timing belt advantageously allows a uniform processing result.

Very particularly preferred is a brush belt which, viewed in the circumferential direction, has one of the following sequences of bristle units which repeat themselves along the circumference: lobes, sisal fabric, felt; (or) lobes, felt, sisal tissue. Here, a cloth can serve to form the lamella. The cloth in the lamella ensures in particular for a rapid absorption of the previously applied cleaning agent. The sisal is used in particular for polishing the edge band. The brush belt presented here has the particular advantage that it offers a high stability during rotation in the brushing tool. The brush belt allows, in particular due to the here proposed Sequence and / or configuration of the bristle units, high smoothness and low noise emission.

The at least one brushing unit is preferably movable toward and away from the workpiece by means of the adjusting device. Preferably, the brushing unit is translationally and / or rotationally movable by means of the adjusting device, for. B. height adjustable and / or pivotable. In particular, the adjusting device has the advantage that the position of the brushing unit can be continuously tracked or adjusted in relation to the workpiece surface to be machined. Thus, the actuator may serve to tolerances and / or local properties of the workpiece, for. B. thickness tolerances of a furniture board, to take into account and possibly even compensate.

Preferably, the brushing unit is translationally movable by means of the adjusting device. As a result, the adjusting device can provide a height adjustment of the brushing unit. To allow the translational movement, the adjusting device preferably has at least one spindle drive and / or at least one, in particular electronically drivable, threaded spindle or movement screw or the like.

According to an advantageous embodiment, it is proposed that the device has two brushing units, wherein the brushing tools of the brushing units are aligned differently to the passage direction. Preferably, the Bürstwergkzeuge are skewed aligned. Such alignment of the brushing tools may allow for simultaneous removal of release agent from portions of upper and lower broad sides of the workpiece and also for parallel machining, particularly polishing, of at least a portion of a visible surface of an edge band attached to a narrow side of the workpiece ,

It is also proposed that the brushing unit has a pivoting device, in particular at least one joint, for pivoting the brushing tool, wherein the brushing tool can be fixed in at least one pivoted position. Preferably, the pivoting device is designed so that the brushing tool can be pivoted in at least two (orthogonal to each other) levels. In particular, the pivoting device is a so-called two-axis pivoting device, which allows pivoting about two (perpendicular to each other aligned and / or intersecting) axes. The pivoting device can with fixing, z. As screws, clamps, bolts, cotter pins or the like, be performed for fixing the brushing tool in the desired, pivoted position.

Furthermore, it is advantageous if the brushing tool has at least one brush belt guided between a drive roller and a tensioning roller. The tensioning roller serves to tension the brush belt. Preferably, the drive roller and the tension roller are held on a common (elongated) plate or a frame of the brushing unit. Preferably, the tension roller is spring-biased and can be moved translationally in relation to the drive roller. This can be done in a particularly advantageous manner, a very fast replacement of the brush belt.

According to an advantageous embodiment, it is proposed that the brush belt, viewed in the circumferential direction of the brush belt, is (only) partially formed with outwardly facing bristles. However, the brush belt is preferably viewed in the circumferential direction of the brush belt, completely formed with outwardly facing bristles. Particularly preferably, the brush belt is formed transversely to its circumferential direction multi-row with outwardly facing bristles. Further Preferably, the bristles are oriented obliquely (but not vertically) in relation to the brush belt.

According to an advantageous embodiment, the brushing unit is movable toward the workpiece so that the brushing tool at least partially comes in (immediate) contact both with a broad side of the workpiece, as well as with the applied on the narrow side edge band. Such a movement may result from the fact that the Bürstwerkzeug the Bürstgregats pivoted by means of the pivoting device to the passage direction (and fixed in the pivoted position) and the Bürstem aggregate by means of the adjusting device (translationally) to the workpiece (from bottom to top or from top to bottom ) is approached. Such a movement of the brushing unit has the advantage that the brushing tool thus brought to the workpiece makes it possible, in addition to and / or in parallel to the removal of the separating agent, to process, in particular to polish, at least a portion of the visible surface of the edge band.

In addition to the fluid application device presented here, the device may have at least one polishing agent addition device. This can be set up and intended to bring the brushing tool into contact with a polishing agent, in particular a polishing compound. The polishing agent may be a hard wax or a (viscous) liquid or pasty polishing agent. For example, a hard wax may be (spring) biased against the brushing tool and / or a liquid or pasty polishing agent may be sprayed onto the brushing tool.

The device presented here, in particular the at least one brushing unit, the fluid application device and / or the adjusting device can or can be used to automate the post-processing of the at least one plate-shaped Workpiece with a program control (overall control) of the workpiece in the pass-processing machine (continuous machine), in particular via data lines and / or radio links, be connected or linked. Alternatively or cumulatively, the device may have its own electronic control unit (ECU). This can contribute to the fact that the device can also be easily integrated as a retrofit component in an existing continuous machine. If necessary, the electronic control unit of the device can be provided and set up to exchange data with the program control of the pass-through machine and / or to obtain data from it.

The device may be equipped with at least one sensor for detecting an operating point parameter. Such an operating point parameter is representative of the respective operating state of the device and / or the continuous machine. Preferred operating point parameters are the (local) thickness of the workpiece to be machined, in particular the local plate thickness of a furniture panel, the temperature of an adhesive joint and / or the edge band, the presence of a workpiece in the region of the device or the like.

For example, serve as a sensor, a driver or a driver roller, which is provided and adapted to detect a local thickness of the workpiece. The local thickness of the workpiece is preferably (directly) measured prior to entry of the workpiece into the device, so that the height of the at least one brushing unit can be adapted to the local position of the top or bottom of the workpiece to be machined. Alternatively or cumulatively, the device may comprise a sensor which is provided and arranged to detect or detect the presence of a workpiece in the region of the device. For this purpose, for example, serve a photoelectric barrier or the like.

The electronic control unit of the device is preferably provided and configured to actuate the device as a function of at least one detected operating point parameter. For example, the control unit may (only) turn on the device if the presence of a workpiece in the region of the device has been detected. The control unit is preferably set up to actuate or switch on the fluid application device only if the presence of a workpiece in the region of the device has been detected and / or a high temperature of the adhesive joint and / or the edge band has been measured. Alternatively or cumulatively, the control unit may be adapted to move the at least one brushing unit by means of the adjusting device in response to a local workpiece thickness toward or away from the workpiece.

Furthermore, the brushing unit for force and / or torque transmission between the drive motor and the brushing tool comprise a clutch. The coupling can be provided and arranged to provide a damped, in particular torsionally damped, force and / or torque transmission and / or at least partially absorb impacts occurring during operation. Preferably, the clutch is a dog clutch. Particularly preferably, the dog clutch has an elastic toothed rim.

1. a) Auftragen des Behandlungsfluides auf das (rotierende) Bürstenband in einem Krümmungsbereich des Bürstenbands,
2. b) Aufbringen des Behandlungsfluides zumindest auf einen Teilbereich einer Breitseite des Werkstücks mittels des Bürstenbands, wobei das Bürstenband das Werkstück mit dem geraden Kontaktbereich kontaktiert,
   wobei das Bürstenband, in Umfangsrichtung des Bürstenbands betrachtet, zwischen einer Auftragsstelle des Behandlungsfluides auf das Bürstenband in dem Krümmungsbereich und einem Kontaktbereichsende des geraden Kontaktbereichs eine Wegstrecke durchläuft und wobei das Behandlungsfluid über zumindest die Hälfte der Wegstrecke fließfähig bleibt.

According to a further aspect, a method for processing at least one plate-shaped workpiece in a continuous motion is proposed. The method is carried out with a post-processing device which comprises at least one brushing unit with at least one brushing tool and at least one fluid application device, wherein the brushing tool has at least one brush belt, the brush belt having a straight contact region and at least one curvature region and wherein the fluid Order facility at least a nozzle provided and arranged for discharging a treatment fluid. The method comprises at least the following steps:

1. a) applying the treatment fluid to the (rotating) brush belt in a curved region of the brush belt,
2. b) applying the treatment fluid at least to a partial region of a broad side of the workpiece by means of the brush belt, wherein the brush belt contacts the workpiece with the straight contact region,
   wherein the brush belt, viewed in the circumferential direction of the brush belt, traverses a distance between an application point of the treatment fluid on the brush belt in the curvature region and a contact region end of the straight contact region and wherein the treatment fluid remains fluid over at least half of the path.

In other words, this means in particular that the treatment fluid (or its liquid and / or volatile constituents) does not substantially evaporate over at least half of the travel distance. Preferably, the application of the treatment fluid by means of the brush belt in step b) takes place both on a partial region of a broad side of the workpiece, as well as on a visible surface, in particular a radius, of the edge band.

1. a) Aufbringen eines Trennmittels zumindest auf einen Teilbereich einer Breitseite des Werkstücks,
2. b) Befestigen eines Kantenbands an mindestens einer Schmalseite des Werkstücks,
3. c) Entfernen des Trennmittels mit einer Vorrichtung zur Nachbearbeitung, die mindestens ein Bürstaggregat mit mindestens einem Bürstwerkzeug und mindestens eine Fluid-Auftragseinrichtung umfasst, wobei das Bürstwerkzeug mindestens ein, insbesondere zwischen einer Antriebsrolle und einer Spannrolle geführtes, Bürstenband hat, wobei das Bürstenband einen geraden Kontaktbereich und mindestens einen Krümmungsbereich hat und wobei die Fluid-Auftragseinrichtung mindestens eine Düse hat, die zum Austragen eines Behandlungsfluides vorgesehen und eingerichtet ist.

According to a further aspect, a method for processing at least one plate-shaped workpiece in a continuous motion is proposed. The method comprises at least the following steps:

1. a) applying a release agent to at least a portion of a broad side of the workpiece,
2. b) attaching an edge band to at least one narrow side of the workpiece,
3. c) removing the release agent with a device for finishing, the at least one brushing unit with at least one brushing tool and at least one fluid application device, wherein the brushing tool has at least one, in particular between a drive roller and a tension roller guided, brush belt, wherein the brush belt has a straight contact area and at least one curvature region and wherein the fluid applicator has at least one nozzle for discharging a treatment fluid is provided and set up.

The above-indicated sequence of the method steps results in a regular operation of a workpiece machining a machine. The process steps a) to c) can be carried out continuously repeatedly. The method steps a) to c) can at least partially be carried out or repeated in parallel in time.

Preferably, the application of the release agent in step a) by means of at least one spraying device, in particular a nozzle, which is particularly preferably arranged in the inlet region of a workpiece in a continuous machine. In particular, the release agent is applied to an edge region of the upper side and / or lower side broad side of the workpiece assigned to the edge band to be fastened. A release agent is understood here to mean a (liquid) agent which prevents adherence of adhesive substances, such as, for example, adhesives. As adhesives, molten plastic or the like, prevented on a wetted with the release agent surface. By means of this liquid release agent it is prevented that laterally leaking glue or adhesive residues adhere to the surface of the plate in an edge coating of the continuous plate, so that a subsequent cleaning is made possible. The devices proposed here are particularly suitable for release agents that have a high evaporation rate and thus adhere for a long time or also partially bond with chips.

According to an advantageous embodiment, it is proposed that in step b) the edge band is glued to the at least one narrow side, wherein the applied release agent prevents adhesion of the adhesive on the broad side of the workpiece and wherein in step c) the treatment fluid in the curvature region the brush belt is applied. Preferably, the fixing of the edge band in step b) takes place by means of a heat input or a thermal treatment, for example by means of at least one laser beam or by means of plasma jets. More preferably, in step b) (cumulatively) pressing of the edge band to the narrow side of the workpiece by means of a pressure roller.

According to an advantageous embodiment, it is proposed that in step c) the removal of the release agent takes place by means of a device proposed here. Preferably, in step c) both a removal of the release agent from at least one broad side of the workpiece, as well as an editing, in particular polishing, at least a portion of a visible surface of the (plastic) edge band. Particularly preferably, the device for post-processing also comprises at least one adjusting device, wherein the brushing unit can be moved by means of the adjusting device towards and away from the workpiece.

Preferably, after step b) and before step c), an ablation of the protrusions of the edge band present transversely to the longitudinal extent of the edge band takes place. This can be done by means of at least one cutting tool, such. As a (edging) cutter, scrapers or the like, done.

The details, features and advantageous embodiments discussed above in connection with the device may accordingly also occur in the methods presented here and vice versa. In that regard, reference is made in full to the statements there for a more detailed characterization of the features.

According to a further aspect, a (non-manual or manual or automated) use of at least one treatment fluid at least for removing a release agent from at least one broad side of a plate-shaped workpiece or from an edge band attached to at least one narrow side of the workpiece or for polishing at least a portion of a visible surface of the edgeband, wherein the treatment fluid is applied in a curved region of a brush belt.

According to an advantageous aspect, a (non-manual or manual) use of at least one brushing unit with at least one brushing tool for (automatic) removal of a release agent from at least one broad side of a plate-shaped workpiece, in particular piece of furniture, or by a (plastic) attached to at least one narrow side of the workpiece. Edge band proposed, wherein the brushing tool for removing the release agent has at least one brush belt.

In connection with the uses presented here, a device proposed here is preferably used, in particular within a machine that processes a workpiece in a continuous process. More preferably, the at least one brushing unit is used both for removing the release agent and for polishing the edge band.

The details, features and advantageous embodiments discussed above in connection with the device and / or the method can accordingly also occur with the uses presented here and vice versa. In that regard, reference is made in full to the statements there for a more detailed characterization of the features.

Fig. 1:

eine ein Werkstück im Durchlauf bearbeitende Maschine,

Fig. 2:

eine Seitenansicht einer Vorrichtung zur Nachbearbeitung mindestens eines plattenförmigen Werkstücks,

Fig. 3:

ein Bürstaggregat,

Fig. 4:

eine perspektivische Ansicht einer Vorrichtung zur Nachbearbeitung mindestens eines plattenförmigen Werkstücks, und

Fig. 5:

eine weitere perspektivische Ansicht einer Vorrichtung zur Nachbearbeitung mindestens eines plattenförmigen Werkstücks,

Fig. 6:

eine perspektivische Ansicht eines Bürstaggregats,

Fig. 7:

eine Veranschaulichung eines Bürstenbands,

Fig. 8:

eine perspektivische Detailansicht des Bürstaggregats aus Fig. 6,

Fig. 9:

eine weitere perspektivische Detailansicht des Bürstaggregats aus Fig. 6, und

Fig. 10

eine Explosionsansicht einer Kupplung, die in einer hier vorgeschlagenen Vorrichtung verwendet werden kann.

The invention and the technical environment will be explained in more detail with reference to the figures. It should be noted that the invention should not be limited by the embodiments shown. In particular, unless explicitly stated otherwise, it is also possible to extract partial aspects of the facts explained in the figures and to combine them with other components and / or findings from other figures and / or the present description. They show schematically:

Fig. 1:

a machine processing a workpiece in the course,

Fig. 2:

a side view of an apparatus for reworking at least one plate-shaped workpiece,

3:

a brushing unit,

4:

a perspective view of an apparatus for reworking at least one plate-shaped workpiece, and

Fig. 5:

a further perspective view of a device for reworking at least one plate-shaped workpiece,

Fig. 6:

a perspective view of a brushing unit,

Fig. 7:

an illustration of a brush belt,

Fig. 8:

a detailed perspective view of the Bürstag from Fig. 6 .

Fig. 9:

another perspective detail view of the Bürstag from Fig. 6 , and

Fig. 10

an exploded view of a coupling that can be used in a device proposed here.

Fig. 1 schematically shows a plate-shaped workpiece 2 in the processing machine 5. The plate-shaped workpiece 2 is an example of a furniture panel. On the narrow side 3 of the workpiece 2, an edge band 4 is attached by means of the machine 5. For this purpose, the workpiece 2 passes through the machine 5 in a direction of passage 6, wherein the machine 5 here by way of example has two conveyor belts 20, between which the workpiece 2 is progressively movable in the passage. When viewed in the direction of passage 6, a release agent 17 is first applied to the broad sides 16 of the plate-shaped workpiece 2 by means of spraying devices 19. The release agent 17 is intended to prevent sticking of adhesive agents, for example of an adhesive, on the broad sides 16 of the workpiece 2. An adhesive agent is, however, regularly required on the narrow sides 3 of the workpiece 2 in order to connect the edge band 4 to the workpiece 2 with a material fit.

Viewed in the direction of passage 6, the separating agent application by means of the spraying 19 different downstream, the workpiece 2 in the processing, processing stations downstream. First, the still uncoated edges on the narrow side 3 of the workpiece 2 are processed with format cutters 23. Subsequently, for example, a previously heated edge band 4 is pressed against the narrow side 3 of the workpiece 2 by means of a pinch roller 24, wherein a material connection of the edge band 4 with the narrow side 3 of the workpiece 2 is preferably carried out by laser or plasma jets, with which the example at least one side adhesive Edge band 4 can be heated until the adhesive activation.

In order to be able to take account of unevenness of the workpiece 2, the edge band 4 is usually fastened to the narrow side 3 with a projection projecting upwards and downwards over the workpiece 2. This supernatant is then first coarse, by means of capping 21, such as chop saws, and then precisely, by means of cutting tools 7, in particular by means of edge cutters, which are tracked depending on the local thickness (height) of the workpiece 2, removed or removed.

After the removal of the transversely to the longitudinal extent of the edge band 4 existing protrusions of the edge band 4 takes place a removal of the release agent 17 of the workpiece 2. This is a device 1 for post-processing of the workpiece 2, wherein the device 1 according to the illustration Fig. 1 in which the workpiece 2 in the pass-processing machine 5 and in the direction of passage 6 considered below to the chip 7 of the machine 5 is arranged. It is shown that the device 1 comprises two brushing units 8, each with a brushing tool 9 and two adjusting devices 10. Thus, each brush unit 8 by means of the associated adjusting device 10 toward and away from the workpiece 2 (translationally) movable.

The adjusting devices 10 are in operative connection with a control unit 25. The adjusting devices 10 are formed here by way of example by means of threaded spindles or movement screws, along which the brushing units 8 (independently of one another) can move upwards or downwards. In order to be able to specify such a movement of the brushing units 8, the control unit 25 is formed here with two electric motors each driving a threaded spindle and an electronic control unit.

In Fig. 1 It can be seen that the brushing tools 9 of the brushing units 8 are aligned differently with respect to the passage direction 6 (skewed). Around To achieve different orientation, each brush unit 8 is executed with a pivoting device 11. It is also shown that each brushing unit 8 is designed with an electronic drive motor 22 and each brush tool 9 driven thereby with a brush belt 14. Depending on the nature and orientation of the brush belt 14, the brush belt 14 can be used simultaneously for removing the release agent 17 and for polishing the edge band 4.

Fig. 2 schematically shows a side view of an apparatus 1 for reworking at least one plate-shaped workpiece 2. In a partial area 18 (edge region) of the broad sides 16 of the workpiece 2, the release agent 17, which is applied to both the upper and on the lower broadside 16, too detect. On the narrow side 3 of the workpiece 2, an edge band 4 is attached.

As shown Fig. 2 the device 1 is formed with two brush units 8 and two adjusting devices 10. Here, the adjusting devices 10 serve to adjust the height of the brushing units 8, so that they can be moved as precisely as possible to the surface of the workpiece 2 to be machined. The brushing units 8 are formed with drive motors 22 and brush tools 9, wherein the brush tools 9 each have a driven brush belt 14. The brush belts 14 are designed to remove the release agent 17 with bristles 15.

In Fig. 2 It can be seen that each brushing unit 8 has a pivoting device 11 for pivoting the brushing tool 9, wherein the brushing tool 9 can be fixed in at least one pivoted position. Thus, the brushing tools 9 can be aligned very variable with respect to the workpiece 2 to be machined. Depending on the orientation of the brushing tool 9 and depending on the nature of the brush belts 14 (density of the bristles 15), can at the same time a removal of release agent 17 and at least partially a polishing of the visible areas of the edge band 4 done.

Fig. 3 schematically shows a brushing unit 8, the view is directed from the front of the one brushing tool 9 of the brushing unit 8. The brush tool 9 has a guided between a drive roller 12 and a tension roller 13 brush belt 14. The drive roller 12 is connected to an electronic drive motor 22. It is shown by way of example that the brush belt 14, viewed in the circumferential direction of the brush belt 14, is only partially formed with outwardly facing bristles 15. In addition, a pivoting device 11 for pivoting the brush tool 9 (by means of hidden edges) is located.

Fig. 4 schematically shows a perspective view of a device 1 for reworking at least one plate-shaped workpiece 2. The view is here laterally and directed from the front of the device 1. Two brushing units 8 can be seen, each of which has a brushing tool 9 connected to a drive motor 22. The brush belts 14 have been omitted here to illustrate the configuration of the drive rollers 12 and the tension rollers 13. Both brushing tools 9 are pivoted by means of pivoting devices 11 and fixed so that the brushing tools 9 are aligned differently with respect to a passage direction 6 of a workpiece 2 to be machined. In addition, it can be seen that the brushing units 8 are adjustable or movable in height by means of adjusting devices 10.

Fig. 5 schematically shows a further perspective view of a device 1 for finishing at least one plate-shaped workpiece 2. In Fig. 5 the view is directed from the back to the device 1. Thus, the two adjusting devices 10 of the device 1 and the two pivoting devices 11 of the two brushing units 8 are clearly visible. The pivoting devices 11 are set up for this purpose and determines to be able to align the brushing tools 9 in fixable positions, skewed to each other. The alignment of the brushing tools 9 by means of the pivoting devices 11 allows the brushing units 8 to be moved toward the workpiece 2 such that the brushing tools 9 are at least partially in contact both with a broad side 16 of the workpiece 2 and with the edge band 4 applied on the narrow side 3 can get in contact. Moreover, in Fig. 5 shown that the adjusting devices 10 are executed with threaded spindles 26.

There is provided herein an apparatus, a method and a use which at least partially solve the problems described with reference to the prior art. In particular, the device, the method and the use in each case make it possible to achieve the most efficient, cost-effective, mechanical and preferably complete removal of a release agent from a piece of furniture. In addition, the device, the method and the use are also suitable for additionally and / or in parallel to the removal of the release agent to process at least a portion of the visible surface of the edge band, in particular to polish.

Fig. 6 schematically shows a perspective view of a brushing unit 8. The brushing unit 8 has a connected to a drive motor 22 brushing tool 9. The brush tool 9 has a guided between a drive roller 12 and a tension roller 13 brush belt 14. The drive roller 12 is connected to an electronic drive motor 22. The brush belt 14 has a straight contact area 30 and two curved areas 31. On a cover 37 of the brushing unit 8, a fluid applicator 27 is attached.

The fluid application device 27 has a nozzle 28, which is formed by way of example in the manner of a spray tube. The nozzle 28 is recognizably associated with one of the two curvature regions 31. In Fig. 6 In addition, it can be seen that the brush belt 14 circumferentially with a plurality of bristle units 38 is formed, which are adhered to a carrier tape 39. The carrier tape 39 is formed here by way of example with a preferred toothed belt.

Fig. 7 schematically shows an illustration of a brush belt 14 in a side view. The brush belt 14 here comprises two curvature regions 31 and a straight contact region 30, which is to come into contact with the workpiece to be machined. In Fig. 7 In addition, a circumferential direction 40 of the brush belt 14 is registered. For example, the bristle units 38 of the brush belt 14 may move in the circumferential direction 40 (or opposite) during operation of the brush belt 14. For clarification, here a contact area beginning 36 and a contact area end 34 of the straight contact area 30 of the brush belt 14 are marked with black dots. In addition, an application point 33 is highlighted with a black dot. It is schematically shown that a nozzle 28 is aligned toward the application site 33. Between the application point 33 and the contact area beginning 36, a distance 35 is defined.

As shown Fig. 7 In this case, the brush belt 14, viewed in the circumferential direction 40 of the brush belt 14, passes through the application point 33 and the contact area end 34, the distance 35. It is also in Fig. 7 indicated that the brush belt 14 in the circumferential direction 40 has the following sequences of bristle units 38: lamella 41, felt 42, sisal fabric 43. This sequence can be repeated along the circumference 40.

Fig. 8 shows a perspective detail view of the brushing unit 8 Fig. 6 , It is shown that the nozzle 28 of the fluid applicator 27 on the cover 37 of the brushing unit 8 is held or fixed. Here, the fluid application device 27 comprises a compressed-air connection 44 and a treatment-fluid connection 45. The nozzle 28 is formed by way of example in the manner of a spray tube and spans a brush belt width 46 of the brush belt 14.

Fig. 9 shows a further perspective detail view of the Bürstaggregats 8 Fig. 6 , It can be seen that the nozzle 28 has a nozzle opening 32, which is aligned with the curvature region 31 of the brush belt 14.

Fig. 10 shows an exploded view of a coupling 47, which can be used in a device proposed here (not shown). The clutch 47 is exemplified here as a dog clutch. The coupling 47 has a first hub 48, a second hub 49 and a toothed rim 50 arranged between them. The coupling 47 can be used in a Bürstaggregat (not shown here) of the proposed device for force and / or torque transmission between the drive motor (not shown here) and the brushing tool (not shown here) of the brushing unit. For this purpose, the first hub 48 with a motor shaft (not shown here) of the drive motor (rotationally fixed) and the second hub 49 with a drive shaft (not shown here) of the drive roller (not shown here) of the brushing unit (rotationally fixed) to be connected. The sprocket 50 here has, for example, four teeth which (in the circumferential direction) provide positive locking between opposing jaws of the dog clutch. Furthermore, the ring gear 50 is exemplified with an elastic material, such as an elastic plastic, in particular polyurethane, formed. Thus, the clutch 47 can provide a damped force and / or torque transmission between the drive motor and the brushing tool and / or at least partially absorb impacts occurring during operation, for example by the movement of the workpiece (not shown here). As a result, a (back-) acting on the drive motor during operation load can be reduced.

LIST OF REFERENCE NUMBERS

1

contraption

2

workpiece

3

narrow side

4

edge band

5

machine

6

Throughput direction

7

clamping tool

8th

Brushing

9

brush tool

10

setting device

11

Pivot means

12

capstan

13

idler

14

brush belt

15

bristles

16

broadside

17

release agent

18

subregion

19

spraying

20

conveyor belt

21

capping

22

drive motor

23

format router

24

pinch

25

control unit

26

screw

27

Fluid applicator

28

jet

29

treatment fluid

30

contact area

31

curvature region

32

nozzle opening

33

application site

34

Contact end of range

35

path

36

Contact range start

37

cover

38

bristle unit

39

carrier tape

40

circumferential direction

41

lamella

42

felt

43

Sisal

44

Compressed air connection

45

Treatment fluid port

46

Brush belt width

47

clutch

48

first hub

49

second hub

50

sprocket

Claims (10)

Device (1) for finishing at least one plate-shaped workpiece (2) which is provided on at least one narrow side (3) with an edge band (4), wherein the device (1) in a machine (5) machining the workpiece (2) in the pass ) and viewed in the direction of passage (6) can be arranged subsequently to a chip removal tool (7) of the machine (5) that removes a protrusion of the edge band (4) transversely to the longitudinal extent of the edge band (4),
characterized in that
the device (1) comprises at least one brushing unit (8) with at least one brushing tool (9) and at least one fluid application device (27), wherein the brushing tool (9) has at least one brush belt (14), wherein the brush belt (14) has a straight contact region (30) and at least one curvature region (31) and wherein the fluid application device (27) has at least one nozzle (28) which is provided and arranged for discharging a treatment fluid (29). Device according to Patent Claim 1, characterized in that the device (1) has two brushing units (8), the brushing tools (9) of the brushing units (8) being differently aligned with the passage direction (6). Device according to claim 1 or 2, characterized in that the nozzle (28) of the fluid application device (27) is held on the brushing unit (8). Apparatus according to claim 1 or 2, characterized in that at least one nozzle opening (32) of the nozzle (28) is aligned towards the curvature region (31) of the brush belt (14). Device according to one of the preceding claims, characterized in that the device (1) comprises at least one adjusting device (10), wherein the Brushing (8) by means of the adjusting device (10) towards and away from the workpiece (2) is movable. Device according to claim 5, characterized in that the brushing unit (8) is movable towards the workpiece (2), that the brushing tool (9) at least partially with both a broad side (16) of the workpiece (2) and with the the narrow side (3) applied edge band (4) comes into contact. Method for processing at least one plate-shaped workpiece (2) in the passage, characterized in that the method is carried out with a device (1) for post-processing, the at least one brushing unit (8) with at least one brushing tool (9) and at least one fluid application device (27), wherein the brushing tool (9) has at least one brush belt (14), wherein the brush belt (14) has a straight contact region (30) and at least one curvature region (31) and wherein the fluid application device (27) comprises at least one A nozzle (28) provided and arranged for discharging a treatment fluid (29), the method comprising at least the following steps: a) applying the treatment fluid (29) to the brush belt (14) in a curved region (31) of the brush belt (14), b) applying the treatment fluid (29) at least to a portion (18) of a broad side (16) of the workpiece (2) by means of the brush belt (14), wherein the brush belt (14) contacts the workpiece (2) with the straight contact region (30),
wherein the brush belt (14), viewed in the circumferential direction of the brush belt (14), between an application point (33) of the treatment fluid (29) on the brush belt (14) in the curvature region (31) and a contact region end (34) of the straight contact region (30 ) passes through a path (35) and wherein the treatment fluid (29) remains fluid over at least half of the path (35). Method for processing at least one plate-shaped workpiece (2) in the passage, characterized in that the method comprises at least the following steps: a) applying a release agent (17) at least to a portion (18) of a broad side (16) of the workpiece (2), b) fixing an edge band (4) to at least one narrow side (3) of the workpiece (2), c) removing the separating means (17) with a device (1) for finishing, comprising at least one brushing unit (8) with at least one brushing tool (9) and at least one fluid application device (27), wherein the brushing tool (9) at least one Brush belt (14), wherein the brush belt (14) has a straight contact region (30) and at least one curvature region (31), and wherein the fluid application device (27) has at least one nozzle (28) suitable for discharging a treatment fluid (29 ) is provided and set up. A method according to claim 8, wherein in step b) the edge band (4) is glued to the at least one narrow side (3), and wherein the applied release agent (17) adheres the adhesive on the broad side (16) of the Workpiece (2) prevents and wherein in step c) the treatment fluid (29) in the curvature region (31) is applied to the brush belt (14). Use of at least one treatment fluid (29) at least for removing a release agent (17) from at least one broad side (16) of a plate-shaped workpiece (2) or from an edge band (4) attached to at least one narrow side (3) of the workpiece (2) or Polishing at least a portion of a visible surface of the edgeband (4), wherein the treatment fluid (29) is applied to a curved portion (31) of a brush ribbon (14).

Images