EP4000832A1 - Dispositif de revêtement, ainsi que procédé - Google Patents

Dispositif de revêtement, ainsi que procédé Download PDF

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Publication number
EP4000832A1
EP4000832A1 EP21208169.9A EP21208169A EP4000832A1 EP 4000832 A1 EP4000832 A1 EP 4000832A1 EP 21208169 A EP21208169 A EP 21208169A EP 4000832 A1 EP4000832 A1 EP 4000832A1
Authority
EP
European Patent Office
Prior art keywords
workpiece
coating material
coating
drive
feed
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP21208169.9A
Other languages
German (de)
English (en)
Inventor
Johannes Schmid
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Homag GmbH
Original Assignee
Homag GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Homag GmbH filed Critical Homag GmbH
Publication of EP4000832A1 publication Critical patent/EP4000832A1/fr
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27D—WORKING VENEER OR PLYWOOD
    • B27D5/00—Other working of veneer or plywood specially adapted to veneer or plywood
    • B27D5/003—Other working of veneer or plywood specially adapted to veneer or plywood securing a veneer strip to a panel edge

Definitions

  • the invention relates to a coating device which is particularly suitable for applying a coating material in the form of a strip or band to a narrow surface of a preferably plate-shaped workpiece.
  • a coating device is used, for example, in the furniture and component industry.
  • the invention relates to a method for applying a coating material to a workpiece.
  • a coating material edging tape
  • format processing usually takes place first, in which the narrow surface is machined with a milling tool so that the adjacent narrow surfaces of the workpiece are aligned at an angle of 90° to one another, for example.
  • the narrow surface coating is then applied and the protruding front and rear edges of the narrow surface coating are shortened with a snipping unit. Areas of the narrow surface coating that protrude upwards/downward in the vertical direction are removed with a milling tool, and then the transitions of the narrow surface coating are processed on all sides by further format processing. The dirt that occurs during processing is then removed by appropriate cleaning.
  • a trimming unit has a relatively complex structure and the control must be designed in such a way that the coating material is trimmed during a run, i.e. while the workpiece is moving in the throughput direction.
  • the machine is increased in size by providing adequate spaces to carry out machining during the run.
  • the waste produced when cutting off the narrow surface coating is also of such a large dimension that it cannot be collected by the chip extraction system in the machine, but must be removed manually at certain time intervals. Furthermore, in the worst case, this waste can cause a malfunction of the snipping unit or have a negative impact on neighboring units. Furthermore, it is generally disadvantageous that the cut side created by the snipping unit and thus the cut quality is designed differently from other sides processed with rotating processing tools.
  • a transfer mechanism is provided with which the coating material can be transferred from a guide to the pressure device.
  • the transfer mechanism ensures that the coating material, which is in particular cut to a defined length, does not curve or otherwise deform in the area of the activation window. Such a deformation could occur in particular in a beginning and end area of the coating material.
  • the invention is based on the object of simplifying the construction of a coating device, while at the same time ensuring a high-quality processing result.
  • the invention provides a coating device which is particularly suitable for coating a narrow surface of a plate-shaped workpiece.
  • a strip-shaped coating material can be used for this purpose.
  • the coating device comprises: a drive device for moving a workpiece to be coated, a workpiece detection device for detecting the workpiece, a pressure device, in particular a pressure roller, for pressing a coating material on the workpiece, a feed drive which is set up to move the coating material into the area of the pressure device , and a drive device for providing a relative movement between the pressing device and the workpiece to be coated.
  • the coating device comprises a control device, which is connected to the drive device, the workpiece detection device and connected to the feed drive. The control device is set up to control the feed drive on the basis of the data provided by the workpiece detection device and the drive device in such a way that the coating material is applied essentially conclusively to a front and/or rear workpiece edge in the throughput direction.
  • a workpiece detection device can in particular be designed as a sensor (or include such a sensor), for example as a tactile or non-contact sensor. Furthermore, the workpiece detection device can be designed as a stop that can release a workpiece.
  • the coating device has the advantage that it can be produced with less structural effort.
  • a trimming unit for trimming excess coating material can be omitted. This leads to lower production costs and also to space savings in the coating device.
  • the conveyor distance required can be shortened. Thus, the coating device is made more compact.
  • the maintenance effort is reduced, especially if the snipping unit is omitted. Possible disturbances are also reduced.
  • the arrangement according to the claims can also be used for better chip disposal.
  • the work result is not negatively influenced.
  • the optical processing quality remains essentially the same.
  • the coating device is set up for processing so-called "thick edges".
  • Thiick edges is a coating material with a thickness of 0.3 to 40 mm, in particular 0.5 mm to 4 mm, preferably in the range of 0.8 mm to 3 mm.
  • the coating device preferably includes a processing device with which a rounding or chamfering can be introduced at the corner area/at the transition area to the main surfaces.
  • the control device is set up in such a way that the coating material can be applied essentially conclusively to a front and/or rear workpiece edge in the throughput direction. This includes an exact termination of the coating material with an edge of the workpiece, or a slightly recessed to slightly overhanging arrangement.
  • the deviation from the workpiece edge should preferably be a maximum of 5 mm, more preferably a maximum of 2 mm.
  • control device is set up to start or stop a movement of the feed drive and/or to carry out an intervention of the feed drive on the coating material.
  • the feed drive can thus be started or stopped on the basis of the data provided by the workpiece detection device and the drive device.
  • the feed drive provides a constant drive speed when it is switched on/started.
  • a coating material fed in by the feed drive can thus be positioned exactly.
  • a further readjustment can be omitted.
  • control device is set up to use the data from the drive device to control the feed drive.
  • the feeding of the coating material can be carried out even more precisely.
  • the drive device is set up to drive a conveyor device, in particular a conveyor belt and/or a conveyor belt, against which the workpiece rests. Comparatively large numbers of pieces can be processed with this configuration.
  • a feed device for feeding the coating material has an optical or mechanical stop in order to position the coating material in front of the feed to the pressure device.
  • An optical stop can be designed in particular as an optical sensor or as a light barrier.
  • a mechanical stop can be designed as a movable bar that releases the coating material by moving into a release position.
  • the coating device preferably comprises an energy source for activating an adhesive provided on the coating material before the coating material is pressed onto the workpiece. It can be provided that the control device coordinates the operation of the energy source for activating an adhesive provided on the coating material with the movement of the coating material, in particular with the operation of the feed drive.
  • the coating device can be equipped with a format processing unit, in particular a milling cutter, in order to carry out final processing on the workpiece.
  • the coating device does not include a trimming unit. Because the coating material is applied to the workpiece with such precision according to one embodiment, a format processing unit can be used for post-processing or final processing. This structure saves space in the coating device. In the case of a coating device in which workpieces are moved by means of a conveyor device, the required conveying distance can be shortened, so that the coating device can be made more compact.
  • control device is set up to apply the coating material essentially conclusively to the workpiece
  • control device is preferably also set up, on the basis of the data provided by the workpiece detection device and the drive device, to control the feed drive in such a way that the coating material in the first run is at a front end in the throughput direction and/or rear workpiece edge is applied in a recessed manner. In this way, protrusion of the coating material applied first can be prevented. This makes it easier to align the workpiece provided with the coating material in a second pass.
  • a method comprises the steps: detecting the workpiece (in particular a plate-shaped workpiece), moving a coating material into the area of a pressure device, the pressure device being set up to apply the coating material to the workpiece.
  • the feed drive is controlled on the basis of the data provided by the workpiece detection device and the drive device in such a way that the coating material is applied to a workpiece edge at the front and/or rear in the throughput direction, essentially conclusively.
  • the method has the advantage, among other things, that a trimming unit for trimming excess coating material can be omitted. This leads to lower production costs and also to space savings in the coating device.
  • the coating material is in particular a strip-shaped coating material, such as an edge band.
  • the method according to the invention is used in particular in the processing of so-called "thick edges" which can be provided with a rounding or chamfering at the corner area/at the transition area to the main surfaces.
  • the so-called “thick edges” are a coating material with a thickness of 0.3 mm to 40 mm, in particular 0.5 mm to 4 mm, preferably in the range of 0.8 mm to 3 mm.
  • the coating material is applied essentially conclusively to a front and/or rear workpiece edge in the throughput direction. This includes an exact termination of the coating material with an edge of the workpiece, or a slightly recessed to slightly overhanging arrangement.
  • the deviation from the workpiece edge should preferably be a maximum of 5 mm, more preferably a maximum of 2 mm.
  • the coating material in particular strip-shaped, is made of a plastic material or consists of this at least in sections.
  • it is a thermoplastic material.
  • a snipping unit is usually used for processing such materials, but this can be omitted within the scope of the present method.
  • the plastic material may comprise PVC (polyvinyl chloride) or ABS (acrylonitrile butadiene styrene).
  • a coating device according to one of the preceding aspects is used as part of the method.
  • An adhesive provided on the coating material is preferably activated before the coating material is pressed onto the workpiece, or an adhesive is applied to the coating material. It can be provided that the control device coordinates the operation of the energy source for activating an adhesive provided on the coating material with the movement of the coating material, in particular with the operation of the feed drive, it being provided in particular that the adhesive is also used in the front and/or rear edge area (in the direction of movement of the coating material) is activated. If an adhesive is applied to the coating material, it is preferred that the adhesive is also applied to the front and/or rear edge area of the coating material. Thus, the coating material can also develop an adhesive effect in the front and/or rear edge region and can adhere to a workpiece.
  • a coating device 1 is described, by means of which panel-shaped workpieces (for example made of wood or a wood-based material) are provided with a coating material on a narrow surface in each case. If a plate-shaped workpiece is to be provided with a coating material on all four sides, this means that the workpiece is guided through the coating device 1 in four passes.
  • panel-shaped workpieces for example made of wood or a wood-based material
  • the coating device can also be designed in such a way that double-sided coating can be carried out.
  • double-sided coating narrow surfaces that point in opposite directions are each provided with a coating material in one pass through a coating device.
  • the coating device 1 comprises a conveyor device 2 , for example a conveyor belt or a conveyor belt, which is driven by a drive device 3 . Furthermore, the coating device 1 comprises a workpiece detection device 4 with which a workpiece W that is moved with the conveyor device 2 can be detected.
  • the workpiece detection device 4 can be a light barrier.
  • the coating device 1 has a pressure roller 5 (pressure device) and a feed device 6 .
  • a coating material B is guided along the feed device 6 in the direction of the pressure roller 5 .
  • the coating material B is in particular a so-called "thick edge".
  • PVC or ABS edge materials are made thicker (at least 0.4 mm).
  • a feed drive 7 is provided adjacent to the feeder 6 to move the coating material B toward the pinch roller 5 .
  • the coating device 1 comprises a control device 10, which is connected to the drive device 3, the feed drive 7 and the workpiece detection device 4, so that the control device 10 is supplied with data by the components mentioned.
  • the feed drive 7 is controlled by the control device 10 of the coating device 1 in such a way that coating material B can be positioned either at the start of the workpiece or at the end of the workpiece, as explained below.
  • the control device 10 is set up to process information from the drive device 3 , the feed drive 7 and the workpiece detection device 4 .
  • the coating material B should be positioned in such a way that the coating material B is applied at the beginning or end of the workpiece (each in the direction of flow) in a recessed or slightly protruding manner so that subsequent format processing can carry out appropriate post-processing.
  • the coating material B is applied in a recessed manner at the beginning or end of the workpiece, so that an alignment of the workpiece W is facilitated in the second pass.
  • a workpiece W is moved by means of the conveyor device 2 and is detected by the workpiece detection device 4 as it passes through.
  • the distance X of the workpiece W from the pressure roller 5 or from the joint is known.
  • the result of the detection of the workpiece W by the workpiece detection device 4 is transmitted to the control device 10 . Since the control device 10 is also connected to the drive device 3 and the feed signals (rotary encoder signals from the drive motor) are thus detected, the control device 10 can determine the point in time at which the workpiece W will reach the pressure roller 5 .
  • the further positioning of the workpiece W in the coating device 1 can be monitored with the feed signals (rotary encoder signals from the drive motor).
  • the coating material B is fed to the workpiece W from the fixed distance Y to the joint point.
  • the fixed distance Y is defined, for example, by a stop or the like in the feed device 6 .
  • Both transport systems ie the drive device 3 and the feed drive 7, are monitored and the transport of the coating material B is controlled via the control device 10.
  • the drive device 3 serves as the master system. This means that the drive speed of the feed drive 7 depends on the drive speed of the drive device 3 .
  • the transport of the coating material B is thus controlled, since the provision of the coating material and the workpiece detection have fixed distances X and Y and the transport routes are thus clearly defined.
  • the coating material B can be cut off either shorter or longer than the workpiece W in the feed device 6 depending on the coating process (throughput).
  • the amount that the coating material B stands back from the workpiece W is smaller than the machining allowance for a format machining that is carried out by means of a milling tool.
  • this measurement can be generated manually or automatically after the format editing has been determined.
  • This procedure has the advantage that the remaining post-processing of the coated, plate-shaped workpiece can be carried out by the rotating tools and units present in the coating device.
  • the coating material B is applied in a recessed manner at the beginning or end of the workpiece, so that an alignment of the workpiece W is facilitated in the second pass.
  • a coating material B is applied protruding, but it can also be applied slightly recessed on the workpiece.
  • an adhesive provided on the coating material B is activated before the coating material B is pressed onto the workpiece W. Activation takes place in such a way that the front and/or rear edge area of the coating material B (in the direction of movement of the coating material) is also activated, so that the edge areas of the coating material are also provided with an activated adhesive.
  • an adhesive is applied to the coating material B, then the adhesive is also applied in the front and/or rear edge region of the coating material.
  • the coating material can also develop an adhesive effect in the front and/or rear edge region and can adhere to a workpiece.
  • FIG. 12 is a schematic plan view of the workpiece W, which has been provided with a coating material in two passes on two narrow surfaces.
  • the coating material applied in the second pass is applied in a slightly protruding configuration (protrusion T).
  • the coating material protrudes by up to 5 mm, preferably up to 2 mm. This overhang can be removed with a milling cutter for format processing.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Coating Apparatus (AREA)
EP21208169.9A 2020-11-16 2021-11-15 Dispositif de revêtement, ainsi que procédé Pending EP4000832A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102020130145.6A DE102020130145A1 (de) 2020-11-16 2020-11-16 Beschichtungsvorrichtung sowie Verfahren

Publications (1)

Publication Number Publication Date
EP4000832A1 true EP4000832A1 (fr) 2022-05-25

Family

ID=78621754

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21208169.9A Pending EP4000832A1 (fr) 2020-11-16 2021-11-15 Dispositif de revêtement, ainsi que procédé

Country Status (2)

Country Link
EP (1) EP4000832A1 (fr)
DE (1) DE102020130145A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023280969A1 (fr) * 2021-07-09 2023-01-12 Homag Gmbh Procédé de revêtement d'une pièce, dispositif de revêtement et programme informatique pour le réglage d'un dispositif de revêtement

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022126704A1 (de) 2022-10-13 2024-04-18 Homag Gmbh Beschichtungsvorrichtung und Verfahren zum Beschichten von Werkstücken

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19741163A1 (de) 1997-09-18 1999-04-01 Homag Maschinenbau Ag Verfahren und Vorrichtung zur Durchlaufbearbeitung von plattenförmigen Werkstücken
DE102015206010A1 (de) 2015-04-02 2016-10-06 Homag Holzbearbeitungssysteme Gmbh Beschichtungsvorrichtung sowie Verfahren
DE102017122701A1 (de) * 2017-09-29 2019-04-04 Homag Gmbh Beschichtungsvorrichtung sowie Beschichtungsverfahren

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19917741A1 (de) 1999-04-20 2000-10-26 Ima Maschinenfabriken Klessmann Gmbh Vorrichtung zum Anfahren eines Kantenstreifens an eine Schmalflächenseite einer eckigen Platte
DE102016204249A1 (de) 2016-03-15 2017-09-21 Homag Gmbh Vorrichtung zum Bearbeiten und/oder Beschichten eines Werkstücks
DE102017114970A1 (de) 2017-07-05 2019-01-10 Homag Gmbh Vorrichtung und Verfahren zum Veredeln von Werkstücken
US10124536B1 (en) 2018-01-08 2018-11-13 Oav Equipment & Tools, Inc. Edge banding machine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19741163A1 (de) 1997-09-18 1999-04-01 Homag Maschinenbau Ag Verfahren und Vorrichtung zur Durchlaufbearbeitung von plattenförmigen Werkstücken
DE102015206010A1 (de) 2015-04-02 2016-10-06 Homag Holzbearbeitungssysteme Gmbh Beschichtungsvorrichtung sowie Verfahren
DE102017122701A1 (de) * 2017-09-29 2019-04-04 Homag Gmbh Beschichtungsvorrichtung sowie Beschichtungsverfahren

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023280969A1 (fr) * 2021-07-09 2023-01-12 Homag Gmbh Procédé de revêtement d'une pièce, dispositif de revêtement et programme informatique pour le réglage d'un dispositif de revêtement

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Publication number Publication date
DE102020130145A1 (de) 2022-05-19

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