EP4124430A1 - Edge banding machine for the edge banding of a lateral surface of a workpiece and relative edge banding method - Google Patents

Edge banding machine for the edge banding of a lateral surface of a workpiece and relative edge banding method Download PDF

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Publication number
EP4124430A1
EP4124430A1 EP22185105.8A EP22185105A EP4124430A1 EP 4124430 A1 EP4124430 A1 EP 4124430A1 EP 22185105 A EP22185105 A EP 22185105A EP 4124430 A1 EP4124430 A1 EP 4124430A1
Authority
EP
European Patent Office
Prior art keywords
edge banding
edge
tape
machine
workpiece
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
EP22185105.8A
Other languages
German (de)
English (en)
French (fr)
Inventor
Davide Coltro
Roberto Conconi
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.)
SCM Group SpA
Original Assignee
SCM Group SpA
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 SCM Group SpA filed Critical SCM Group SpA
Publication of EP4124430A1 publication Critical patent/EP4124430A1/en
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 present invention relates to an edge banding machine for edge-edging at least one side surface of a workpiece.
  • the present invention also relates to a relative edge banding method.
  • the invention relates to an edge banding machine of the above type, for applying a decorative edge to a panel made of wood, metal, ceramic, plastic, glass, fiberglass, and the like, in such a way that the final edge-banded panel has a homogeneous thicknesses in every point.
  • edge banding machines for wooden panels used for finishing the surface machining of such panels by applying a decorative edge.
  • the decorative edges are usually edge banding tapes made of plastic, wood, or metal, supplied in reels or strips.
  • Known edge banding machines usually comprise a sliding support surface, on which a panel comprising a lateral surface, or edge, to be edge banded is arranged and made to slide.
  • This sliding plane is usually equipped with at least one abutment element, to keep said panel in position.
  • said known types of edge banding machines comprise an edge banding station arranged in correspondence with one side of said sliding support plane.
  • the edge banding station comprises, in turn, a spreading unit, for applying the glue on said lateral surface to be coated while said panel flows, a reel of edge banding tape, and a pressing unit, comprising pressing rollers, arranged downstream of the spreading unit, to make the edge banding tape adhere to said glued side surface.
  • Such edge banding machines of the prior art also comprise cutters, arranged downstream of the edge banding station, for cutting and rounding the excesses of the previously applied edge banding tape.
  • the panel leaving the edge banding machines of the prior art may have edges with non-homogeneous thicknesses. This involves the production of panels with aesthetic defects and the potential waste of such panels.
  • the variability in thickness can be present inside an edge banding tape belonging to the same reel or in edge banding tapes belonging to different reels used to cover the side surface of a single panel.
  • edge banding machines have been proposed, in which the edge banding station is provided with a sensor for detecting the thickness of the edge banding tape before its application and milling means, for milling the portions of said edge banding tape having thicknesses greater than a predetermined threshold.
  • edge banding tapes can be milled without being damaged.
  • the object of the present invention is to provide an edge banding machine that is capable of producing panels with homogeneous edges, regardless of the type of edge banding tapes used.
  • a further object of the present invention is to provide an edge banding machine that is capable of reducing the number of rejected panels.
  • the object of the present invention is to provide an edge banding machine that is safe, relatively simple to manufacture, and has competitive costs if compared to the prior art.
  • the object of the present invention is to provide a method for applying an edge to a panel by means of such a machine.
  • an edge banding machine for the edge banding of at least one lateral surface or edge of a workpiece, such as a panel made of wood, metal, glass, ceramic, fiberglass, plastic and the like with an edge banding tape, comprising a pressing unit, to press an edge banding tape on said edge of said workpiece, at least one sensor, to detect the actual thickness value of said edge banding tape before its application by said pressing unit and a logic control unit connected to said at least one sensor and comprising storing means to store one or more nominal thickness values of said edge banding tape, said edge banding machine comprising at least one machining group, for machining said edge, placed before said pressing unit and connected to said logic control unit, and said logic control unit is configured to send a signal to said at least one machining group to machine said edge if said actual thickness value differs from said one or more nominal thickness values, in such a way to compensate for said thickness difference of said edge banding tape.
  • said logic control unit is configured to send an alarm signal if the number of actual thickness values different from said one or more nominal thickness values of said edge banding tape is greater than a predetermined number.
  • said edge banding machine comprises a resting plane, to support said workpiece, said resting plane comprising moving means to move said workpiece in a sliding area along a direction, from an entry position towards an exit position, a spreading unit, placed in said sliding area, to spread, while in use, an adhesive substance of a predetermined thickness on said edge of said workpiece, said pressing unit is placed in said sliding area after said spreading unit, with respect to said entry position, and it comprises an entry for said edge banding tape and pressing means to press, while in use, said edge banding tape on said edge of said workpiece, and said at least one sensor is placed at said entry or before said entry.
  • said edge banding machine comprises a tape feeding unit comprising at least one reel or slats of said edge banding tape, and sliding means, for sliding said edge banding tape towards said pressing unit.
  • said logic control unit is configured to start a recalibration procedure of said at least one sensor, at each start of said edge banding machine.
  • said logic control unit is configured to write the actual thickness values different from said one or more nominal thickness values of said edge banding tape in said storing means and to associate to each edge banding tape the number of actual thickness values different from said one or more nominal thickness values.
  • said at least one sensor is an electronic caliper, and/or a laser sensor, and/or an ultrasound sensor, and/or an inductive sensor.
  • said alarm signal is a signal of block of said edge banding machine, and/or an acoustic signal, and/or a light signal, and/or a tactile signal and/or a video signal which can be displayed on a screen comprised in said edge banding machine.
  • said alarm signal can be sent to remote devices such as tablets or smartphones or smartwatches or cloud.
  • said edge banding machine comprises a further machining group for machining said workpiece after the pressing of said edge banding tape.
  • an edge banding method for the edge banding of at least one lateral surface or edge of a workpiece, such as a panel made of wood, glass, ceramic, metal, fiberglass, plastic and the like with an edge banding tape, wherein said edge banding tape is pressed onto said edge of said workpiece by pressing means of a pressing unit, said method comprising the following steps:
  • said method comprises the following step: E. sending a signal to at least one machining group to machine said edge of said workpiece before the application of said edge banding tape, in such a way to compensate for said thickness difference of said edge banding tape.
  • a recalibration step of said at least one sensor is provided for.
  • said method comprises a writing step of said actual thickness values different from said nominal thickness values in said memorization means.
  • figure 1 shows a schematic view of an edge banding machine according to the present invention.
  • an edge banding machine 1 according to the present invention can be seen.
  • this edge banding machine 1 is a pass-through machine and is capable of applying an edge banding or covering tape to edge band at least one side surface or edge B of a workpiece P, such as a panel made of wood, metal, glass, ceramic, metal, fiberglass, plastic and the like by means of an edge banding tape.
  • the edge banding machine 1 comprises a support surface 2, sliding in a sliding area 20, to support the piece P to be edge banded and making it slide in the sliding area 20 along a direction X, from an entry position I, towards an outlet position O.
  • Said edge banding machine 1 also comprises a machining group 7, for machining said edge B, arranged in the sliding area 20.
  • Said edge banding machine 1 also comprises a spreading unit 3, arranged in the sliding area 20, downstream of the machining group 7, with respect to said inlet position I, to spread, in use, an adhesive substance of a predetermined thickness on the edge B.
  • Said edge banding machine 1 also comprises a pressing unit 4, arranged in the sliding area 20 downstream of the spreading unit 3 with respect to said inlet position I, to press an edge banding tape on the edge B of the piece P after its spreading.
  • Said edge banding machine 1 also comprises a tape feeding unit 5, or magazine, which comprises at least one reel or strips of edge banding tape, to feed the pressing unit 4.
  • Said edge banding machine 1 also comprises a sensor 6, arranged between the tape feeding unit 5, and the pressing unit 4, to detect the actual thickness of the edge banding tape, before said edge banding tape is applied to the edge B of the panel P by the pressing unit 4.
  • Said edge banding machine 1 also comprises a logic control unit 8, connected to the sensor 6 and to the machining group 7 and comprising storage means for memorizing one or more nominal thickness values of said edge banding tape.
  • Said edge banding machine 1 also comprises a further machining group 9, to carry out further machining, such as finishing the edge B of the newly coated panel P, arranged in the sliding area 20 downstream of the pressing unit 4, with respect to said position input I.
  • the edge banding machine 1 can comprise only the pressing unit 4, the sensor 6, and the logic control unit 8, in this case, connected only to the sensor 6, while the other elements can be connected to this edge banding machine 1, for example being part of other machines, or not be present at all.
  • an edge banding machine 1 can comprise the pressing unit 4, the sensor 6, and the logic control unit 8 and at least one of the further elements of figure 1 .
  • the edge banding machine 1 can also comprise display or alarm means connected to the control unit 8, such as, for example, a screen, a light, or a loudspeaker, for the reasons better illustrated below.
  • the edge banding machine 1 can also comprise measuring means connected to the control unit 8, to measure the dimensions of the edge B of said panel, as better illustrated below.
  • the support plane 2 is slidingly coupled to tracks (not shown) arranged parallel to the X direction
  • the support plane 2 is connected to motor means (not shown), to the sliding, in use, of said support plane 2 on said tracks along the direction X. This sliding takes place at a predetermined first speed v x .
  • the support plane 2 can comprise abutment elements (not shown), to keep the panel P in position so that the edge B can be worked by the spreading unit 3 and by the pressing unit 4 and possibly by the machining group 7 and 9, as better illustrated below.
  • abutment elements can be movable and/or adapt to the dimensions of the panel P, so that the edge banding machine 1 is capable of edge banding workpieces of different sizes and shapes.
  • said abutment elements can be configured to abut with the two ends of the edge B to be covered with the edge banding tape.
  • said abutment elements can be equipped with said measuring means (for example position sensors), in such a way as to be able to measure the total length of the edge B to be edge banded, and provide indications of the relative position of said edge B in the sliding area 2.
  • the support surface 2 is usually arranged upstream of the spreading unit 3, with respect to said inlet position I.
  • the panel P to be edge banded is placed on the support surface 2, with the edge B to be coated facing towards the spreading unit 3, the pressing unit 4, and the machining group 7 and 9. Therefore, when the edge banding machine 1 is operated, the support surface 2 moves along the direction X with said predetermined first speed v x , meeting, in sequence, the machining group 7, the spreading unit 3, the pressing unit 4, and the further machining group 9.
  • the spreading unit 3 generally comprises feeding means for the adhesive substance and an edge banding roller connected to the feeding means, for receiving a quantity of an adhesive substance from the respective feeding means.
  • the roller is made in such a way as to be able to retain a predetermined quantity of adhesive substance and spread it, with said predetermined thickness, rotating on the edge B, under the action of the friction force exerted by the edge B on the roller 3 due to the movement of the panel P along the X direction.
  • the adhesive substance is usually glue.
  • the pressing unit 4 comprises an inlet 40 for the edge banding tape, and pressing means 41 for pressing, in use, the edge banding tape on the edge B of the panel P.
  • the inlet 40 receives the already taut tape from the tape feeding unit 5. Said edge banding tape is then diverted, for example by guides, towards the pressing means 41.
  • the pressing means 41 can comprise a pressure roller, to exert a pressure on the edge banding tape so that the latter adheres to edge B of the panel.
  • said pressing means 41 can comprise a plurality of pressure rollers arranged in series, so as to exert an optimal pressure of the edge banding tape on the edge B of the panel P.
  • the tape feeding unit 5, or magazine can comprise at least one housing (not shown), for housing at least one reel or strips of edge banding tape.
  • the tape feeding unit 5 also comprises sliding means 50, for the sliding of said edge banding tape towards the inlet 40 of the pressing unit 4. This sliding takes place at a predetermined second speed v 2 .
  • the sensor 6 can be any sensor capable of measuring the thickness in a precise manner, and in particular an electronic gauge, and/or an inductive sensor, and/or a laser sensor, and/or an ultrasonic sensor.
  • the electronic gauge is preferable as it has a low cost compared to the other sensors available.
  • the senor 6 is arranged at the inlet 40 for the edge banding tape. In this way, it is possible to make a precise measurement of the thickness of the edge banding tape, since the measurement is made on the already taut edge banding tape.
  • the senor 6 can be arranged at any point between the tape feeding unit 5 and the pressing means 41.
  • the machining group 7 is, as mentioned, arranged upstream of the spreading unit 3 and of the pressing unit 4, with respect to the inlet position I.
  • the machining group 7 comprises cutters or other cutting means, to remove material from the edge B with a predetermined precision.
  • the control unit 8 comprises, as mentioned, the storage means for storing one or more nominal thickness values of the edge banding tape present in the tape feeding unit 5.
  • said one or more nominal thickness values can be manually inserted by an operator when the edge banding tape is changed in the tape feeding unit 5.
  • this manual insertion can take place by means of an acquisition device connected to the control unit 8.
  • the edge banding machine 1 can comprise a reader (not shown), such as, for example, a bar code reader, to identify the edge banding tape inserted inside the tape feeding unit 5 by means of at least a given identification of the relative bar code.
  • control unit 8 can be configured to connect to a database containing said at least one identifier and said one or more nominal thickness values of the edge banding tape associated with said at least one identifier, so as to storing said one or more nominal thickness values in said storage means when the edge banding tape is changed in the tape feeding unit 5.
  • said reader is arranged at the tape feeding unit 5, so as to be able to insert the reel or strips of the edge banding tape and to identify them with said reader in a single point of the machine 1.
  • the control unit 8 is configured to receive the actual value of the thickness measured by said at least one sensor 6, to detect any deviation of said actual thickness value measured with respect to said one or more nominal thickness values, and, send an alarm signal if the detected deviation is greater than a predetermined threshold.
  • the predetermined threshold can be stored in the storage means or calculated starting from the value of the nominal thickness during use.
  • the alarm signal can be a signal sent to said display or alarm means, so as to warn the operator of the deviation of the nominal thickness from said predetermined threshold.
  • the alarm signal can be an acoustic signal, a light signal, and/or a video signal, which can be displayed on said screen.
  • the edge banding machine 1 can stop, so as to allow the operator to replace the defective beading tape reel or strips.
  • control unit 8 can also be configured to send a signal to start a recalibration procedure of the sensor 6.
  • too great a deviation of the actual thickness of the edge banding tape with respect to its nominal thickness can be connected either to a particularly defective reel of the edge banding tape, or to a measurement error due to the sensor 6 itself.
  • the recalibration procedure can take place automatically, or semi-automatically, using a calibration tape of known thickness, arranged in correspondence with said sensor 6.
  • the control unit 8 can also be configured to write to the storage means the actual thickness values of the edge banding tape that differ from the nominal thickness values.
  • said logic control unit 8 is capable of writing in the storage means the actual thickness values different from the nominal thickness values, and it is able to associate to each edge banding tape the number of actual thickness values different from said one or more thickness nominal values.
  • control unit 8 can be configured to identify the number of actual thickness values of said edge banding tape that differ from its nominal thickness value.
  • the control unit 8 can update a counter that relates to the number of actual values of measured different thicknesses. If this number is greater than a predetermined number, the control unit 8 can be configured to send a further alarm signal. This counter/further alarm signal also advantageously makes it possible to identify whether a batch of edge banding tape reels is particularly defective.
  • the control unit 8 of the machine 1 is also configured for sending a signal to the machining group 7 to work the edge B, in such a way as to compensate for said thickness difference of said edge banding tape.
  • the control unit 8 can be configured to consider this difference greater than zero if its module is greater than the machining accuracy of the machining group 7.
  • control unit 8 of the machine 1 is configured to receive the relative position of said panel P in the sliding area 20, read the first speed v x , the second speed v 2 , the dimensions of the panel P and the distance of the portion of the edge banding tape measured by the sensor 6 with respect to the pressing means 41, in such a way as to be able to send said signal to the machining group 7 for machining the portion of the edge B that will be coated with the portion of the measured edge banding tape.
  • the further machining group 9 is configured for machining the piece P after pressing said edge banding tape.
  • This further machining group can also comprise cutters or other cutting means and allows the edge B of the newly coated panel P to be finished.
  • a panel P having an edge B is placed on said support plane 2, in said inlet position I.
  • the support plane 2 advances along the direction X, from said inlet position I towards the outlet position O.
  • Said control 8 carries out the following steps:
  • said control unit 8 can perform the following step: E. sends a signal to said machining group 7, to work the edge B of said panel P before the application of said adhesive material and of said edge banding tape, in such a way as to compensate for said difference in thickness of said edge banding tape.
  • a recalibration step of the sensor 6 can be provided.
  • such a method can comprise a step of writing said actual thickness values different from said nominal thickness value in said storage means.
  • a step for sending a further alarm signal can be provided.
  • the edge banding machine 1 just described and the relative method advantageously allow to detect the presence of macroscopic defects in the edge banding tapes, before their application, so as to avoid the production of defective panels, thus reducing possible waste production.
  • this edge banding machine 1 and the method of operation allow to signal the presence of particularly defective batches of edge banding tapes, thanks to the memorization of the data relating to the defects of said tapes.
  • this edge banding machine 1 and the relative method allow avoiding the production of defective panels even in the case, in which measurement errors occur by the sensor 6 itself, the possibility of recalibration of the sensor 6 itself being provided. This further reduces the waste of the produced panels P.
  • the edge banding machine 1 and the relative method advantageously allow compensating for these defects, by means of the targeted machining of the edge B of the panel before the application of the portion of the defective edge banding tape, in in such a way as to produce panels with homogeneous edges.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Basic Packing Technique (AREA)
EP22185105.8A 2021-07-28 2022-07-15 Edge banding machine for the edge banding of a lateral surface of a workpiece and relative edge banding method Pending EP4124430A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102021000020090A IT202100020090A1 (it) 2021-07-28 2021-07-28 Macchina bordatrice per la bordatura di una superficie laterale di un pezzo e relativo metodo di bordatura.

Publications (1)

Publication Number Publication Date
EP4124430A1 true EP4124430A1 (en) 2023-02-01

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP22185105.8A Pending EP4124430A1 (en) 2021-07-28 2022-07-15 Edge banding machine for the edge banding of a lateral surface of a workpiece and relative edge banding method

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EP (1) EP4124430A1 (it)
IT (1) IT202100020090A1 (it)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2230626A1 (de) * 2009-03-15 2010-09-22 Dula-Werke Dustmann & Co. GmbH Kennzeichnungsverfahren und Verarbeitungsverfahren von Massiv- und Verbundvollmaterialplatten mittels RFID sowie Vorrichtung hierzu
DE102015008891B3 (de) * 2015-07-09 2016-08-25 Ima Klessmann Gmbh Holzbearbeitungssysteme Verfahren und Vorrichtung zur Kantendickenmessung beim Aufbringen von Kantenkaschierung auf die Schmalseiten plattenförmiger Werkstücke

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2230626A1 (de) * 2009-03-15 2010-09-22 Dula-Werke Dustmann & Co. GmbH Kennzeichnungsverfahren und Verarbeitungsverfahren von Massiv- und Verbundvollmaterialplatten mittels RFID sowie Vorrichtung hierzu
DE102015008891B3 (de) * 2015-07-09 2016-08-25 Ima Klessmann Gmbh Holzbearbeitungssysteme Verfahren und Vorrichtung zur Kantendickenmessung beim Aufbringen von Kantenkaschierung auf die Schmalseiten plattenförmiger Werkstücke

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Publication number Publication date
IT202100020090A1 (it) 2023-01-28

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