EP2902160A1 - Macchina per la bordatura di pannelli di legno o simili - Google Patents
Macchina per la bordatura di pannelli di legno o simili Download PDFInfo
- Publication number
- EP2902160A1 EP2902160A1 EP15153849.3A EP15153849A EP2902160A1 EP 2902160 A1 EP2902160 A1 EP 2902160A1 EP 15153849 A EP15153849 A EP 15153849A EP 2902160 A1 EP2902160 A1 EP 2902160A1
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- EP
- European Patent Office
- Prior art keywords
- branch
- recirculation
- feeding
- hot gas
- machine according
- 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.)
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Classifications
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- 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 a machine for edgebanding wood panels or the like.
- the present invention relates to a machine for edgebanding wood panels or the like either with a finishing edge with no glue and defined by two overlapping layers of co-extruded plastic materials, or with a finishing edge provided with a layer of glue.
- the machine comprises a support surface for at least one panel; an edgebanding assembly; and a feeding device to feed the panels in succession through the edgebanding assembly and to allow the edgebanding assembly itself to apply a finishing edge along at least part of the lateral profile of each panel.
- the machine comprises, furthermore, a feeding device to feed a hot gas, in particular a hot gas under pressure, onto the finishing edge and/or onto the lateral profile of the panel, and to allow the connection between the finishing edge and the panel itself.
- a feeding device to feed a hot gas, in particular a hot gas under pressure, onto the finishing edge and/or onto the lateral profile of the panel, and to allow the connection between the finishing edge and the panel itself.
- the gas is heated up progressively by a plurality of heating devices, which are mounted in succession along the feeding device, and is directed onto the finishing edge and/or onto the lateral profile of the panel by means of an outlet nozzle provided with a shut-off valve.
- the shut-off valve In the presence of the panel, the shut-off valve is arranged in a closing position, in which the hot gas is fed onto the finishing edge and/or onto the lateral profile of the panel through the outlet nozzle. In the absence of the panel, the shut-off valve is moved to an opening position, in which the hot gas is dispersed into the external environment.
- numeral 1 indicates a machine for edgebanding wood panels 2 or the like, as a whole.
- Each panel 2 has two main faces 3, which are parallel and opposite to one another, and is limited by a lateral profile 4, which extends between the two faces 3, and comprises, in the case in point, two minor lateral faces 5, which are parallel to one another and to a horizontal direction 6 and two minor lateral faces 7, which are parallel to one another and to a horizontal direction 8 that is perpendicular to direction 6 itself.
- Machine 1 comprises a feeding device 9 of known type, which defines a substantially horizontal support surface P for the panels 2 and is configured to feed the panels 2 in succession in direction 6.
- Machine 1 comprises, furthermore, an edgebanding assembly 10 configured to apply a finishing edge 11 onto the lateral profile 4 of panel 2.
- edge 11 is an edge with no glue, defined by two overlapping layers of co-extruded plastic materials, and one of them is melted to allow the union of edge 11 with panel 2.
- edge 11 is provided with a layer of glue, which is activated thermally to allow the union of edge 11 with panel 2.
- Edge 11 is separated from the ribbon of a bobbin 12, and is stabilized on profile 4 by means of a pressure roller 13, which is mounted to rotate about its longitudinal axis 14, which is substantially vertical and parallel to a direction 15 that is orthogonal to directions 6 and 8.
- assembly 10 comprises, furthermore, a feeding device 16 to feed a hot gas against edge 11, preferably but not necessarily a hot gas under pressure, in the case in point hot air under pressure.
- Device 16 comprises an outlet nozzle 17, which is mounted between panel 2 and edge 11, has a plurality of distribution holes 18, and is connected with a known compressed air pneumatic device (not illustrated) by means of a feeding branch 19.
- the air under pressure fed along branch 19 is heated up progressively by a plurality of heating devices 20 (in the case in point, three heating devices 20), which are mounted in succession along branch 19 itself.
- Each device 20 has a tubular duct 21, which is crossed by the air, is provided with an internal electric resistor 22, and is connected with each adjacent duct 21 by the interposition of a tubular connector 23, which is mounted between the ducts 21.
- the temperature of the hot air fed along branch 19 is measured by a plurality of temperature sensors 24, each inserted inside a respective connector 23.
- nozzle 17 is provided with an electric resistor that is completely similar to the resistors 22, and with a temperature sensor that is completely similar to the sensors 24.
- Device 16 comprises, furthermore, a recirculation branch 25, which extends downstream of nozzle 17 in a feeding direction 26 of the hot air along device 16, and comprises, in the case in point, a first segment 27 having an inlet that is connected to branch 19 by means of the interposition of a shut-off valve 28, and a second segment 29 facing nozzle 17 so as to cause the hot air fed through nozzle 17 itself to recirculate.
- a recirculation branch 25 which extends downstream of nozzle 17 in a feeding direction 26 of the hot air along device 16 and comprises, in the case in point, a first segment 27 having an inlet that is connected to branch 19 by means of the interposition of a shut-off valve 28, and a second segment 29 facing nozzle 17 so as to cause the hot air fed through nozzle 17 itself to recirculate.
- Branch 25 comprises, furthermore, an outlet duct 30, which connects the two segments 27, 29 to one another, extends through a heat exchanger 31, and communicates, downstream of exchanger 31 itself, with the external environment.
- Exchanger 31 is mounted on branch 19 upstream of the heating devices 20 in direction 26, and allows the hot air fed along branch 25, that is to say both the hot air fed through nozzle 17 and the hot air fed through valve 28, to heat up the air under pressure fed along branch 19.
- valve 28 In the presence of panel 2, valve 28 is moved to a closing position, in which the first segment 27 is closed to feed the hot air firstly through nozzle 17, then against edge 11, and finally along the second segment 29.
- valve 28 In the absence of panel 2, valve 28 is moved to an opening position, in which the hot air is fed along the first segment 27.
- the heat exchanger 31 is eliminated and the outlet duct 30 is connected with branch 19 upstream of the heating devices 20 in direction 26.
- FIG 3 differs from that illustrated in figures 1 and 2 in that, in it, exchanger 31 is eliminated and the recirculation branch 25 is eliminated and replaced with a recirculation branch 32 comprising a recirculation manifold 33 having an inlet connected with branch 19 by means of valve 28 and, for each connector 23, a respective recirculation duct 34 configured to connect manifold 33 with connector 23 itself.
- valve 28 is opened and the hot air fed downstream of nozzle 17 is recirculated again inside the feeding branch 19 at least through the ducts 34.
- Each duct 34 is provided with a pressure adjusting device 35, which is configured to feed the hot air inside the relative connector 23 at a pressure that is at least equal to the pressure of the hot air in branch 19, and to prevent a return of the hot air along manifold 33 and to nozzle 17.
- Manifold 33 is connected with branch 19 upstream of the heating devices 20 in direction 26, and is, furthermore, connected with the external environment by means of the interposition of a shut-off valve 36.
- the hot air is recirculated in the recirculation ducts 34 and in branch 19 when valve 36 is closed, while it is dispersed into the external environment when valve 36 is open.
- the variant illustrated in figure 4 differs from that illustrated in figures 1 and 2 in that, in it, the connectors 23 are eliminated and replaced with respective heat exchangers 38 and the recirculation branch 25 is eliminated and replaced with a recirculation branch 39, which has an inlet connected with branch 19 by means of valve 28, crosses the exchangers 38 in succession, and has an outlet connected with the external environment.
- valve 28 is opened and the hot air fed downstream of nozzle 17 is fed along the recirculation branch 39 to heat up the air under pressure fed along branch 19.
- branch 39 comprises a first segment extending in succession through the exchangers 38, and a second segment to heat up a tank containing the glue that is to be applied onto the lateral profile 4 of panel 2 or onto edge 11.
- each recirculation branch 32, 39 may also be provided with a further recirculation segment (completely similar to segment 29) facing nozzle 17 to cause the hot air fed through nozzle 17 itself to be recirculated.
- the presence of the recirculation branches 25, 32 and 39 therefore allows the hot air fed downstream of the outlet nozzle 17 to be reused to heat up the air under pressure fed along the feeding branch 19 and/or to heat up the glue that is to be applied onto the lateral profile 4 of panel 2 or onto edge 11.
Abstract
Description
- The present invention relates to a machine for edgebanding wood panels or the like.
- In particular, the present invention relates to a machine for edgebanding wood panels or the like either with a finishing edge with no glue and defined by two overlapping layers of co-extruded plastic materials, or with a finishing edge provided with a layer of glue.
- The machine comprises a support surface for at least one panel; an edgebanding assembly; and a feeding device to feed the panels in succession through the edgebanding assembly and to allow the edgebanding assembly itself to apply a finishing edge along at least part of the lateral profile of each panel.
- The machine comprises, furthermore, a feeding device to feed a hot gas, in particular a hot gas under pressure, onto the finishing edge and/or onto the lateral profile of the panel, and to allow the connection between the finishing edge and the panel itself.
- The gas is heated up progressively by a plurality of heating devices, which are mounted in succession along the feeding device, and is directed onto the finishing edge and/or onto the lateral profile of the panel by means of an outlet nozzle provided with a shut-off valve.
- In the presence of the panel, the shut-off valve is arranged in a closing position, in which the hot gas is fed onto the finishing edge and/or onto the lateral profile of the panel through the outlet nozzle. In the absence of the panel, the shut-off valve is moved to an opening position, in which the hot gas is dispersed into the external environment.
- Known machines for edgebanding panels of the type described above have certain drawbacks mainly due to the fact that the dispersion of the hot gas into the external environment involves an obvious energy waste, may be dangerous for operators and may overheat the mechanical components mounted close to the outlet nozzle.
- It is the object of the present invention to provide a machine for edgebanding wood panels or the like, which is exempt from the above-described drawbacks and is simple and cost-effective to implement.
- According to the present invention, there is provided a machine for edgebanding wood panels or the like, as claimed in the appended claims.
- The present invention will now be described with reference to the accompanying drawings, which illustrate a non-limiting embodiment thereof, in which:
-
figure 1 is a perspective diagrammatic view, with parts removed for clarity, of a preferred embodiment of the machine of the present invention; -
figure 2 is a diagrammatic view of a detail of the machine infigure 1 ; -
figure 3 is a diagrammatic view of a first variant of the detail infigure 2 ; and -
figure 4 is a diagrammatic view of a second variant of the detail infigure 2 . - With reference to
figure 1 ,numeral 1 indicates a machine for edgebandingwood panels 2 or the like, as a whole. - Each
panel 2 has twomain faces 3, which are parallel and opposite to one another, and is limited by alateral profile 4, which extends between the twofaces 3, and comprises, in the case in point, two minorlateral faces 5, which are parallel to one another and to ahorizontal direction 6 and two minorlateral faces 7, which are parallel to one another and to ahorizontal direction 8 that is perpendicular todirection 6 itself. -
Machine 1 comprises afeeding device 9 of known type, which defines a substantially horizontal support surface P for thepanels 2 and is configured to feed thepanels 2 in succession indirection 6. -
Machine 1 comprises, furthermore, anedgebanding assembly 10 configured to apply afinishing edge 11 onto thelateral profile 4 ofpanel 2. - In the case in point,
edge 11 is an edge with no glue, defined by two overlapping layers of co-extruded plastic materials, and one of them is melted to allow the union ofedge 11 withpanel 2. - According to a variant not shown,
edge 11 is provided with a layer of glue, which is activated thermally to allow the union ofedge 11 withpanel 2. -
Edge 11 is separated from the ribbon of abobbin 12, and is stabilized onprofile 4 by means of apressure roller 13, which is mounted to rotate about itslongitudinal axis 14, which is substantially vertical and parallel to adirection 15 that is orthogonal todirections - As shown in
figures 1 and2 ,assembly 10 comprises, furthermore, afeeding device 16 to feed a hot gas againstedge 11, preferably but not necessarily a hot gas under pressure, in the case in point hot air under pressure. -
Device 16 comprises anoutlet nozzle 17, which is mounted betweenpanel 2 andedge 11, has a plurality ofdistribution holes 18, and is connected with a known compressed air pneumatic device (not illustrated) by means of afeeding branch 19. - The air under pressure fed along
branch 19 is heated up progressively by a plurality of heating devices 20 (in the case in point, three heating devices 20), which are mounted in succession alongbranch 19 itself. - Each
device 20 has atubular duct 21, which is crossed by the air, is provided with an internalelectric resistor 22, and is connected with eachadjacent duct 21 by the interposition of atubular connector 23, which is mounted between theducts 21. - The temperature of the hot air fed along
branch 19 is measured by a plurality oftemperature sensors 24, each inserted inside arespective connector 23. - According to a variant not shown,
nozzle 17 is provided with an electric resistor that is completely similar to theresistors 22, and with a temperature sensor that is completely similar to thesensors 24. -
Device 16 comprises, furthermore, arecirculation branch 25, which extends downstream ofnozzle 17 in afeeding direction 26 of the hot air alongdevice 16, and comprises, in the case in point, afirst segment 27 having an inlet that is connected tobranch 19 by means of the interposition of a shut-offvalve 28, and asecond segment 29 facingnozzle 17 so as to cause the hot air fed throughnozzle 17 itself to recirculate. -
Branch 25 comprises, furthermore, anoutlet duct 30, which connects the twosegments heat exchanger 31, and communicates, downstream ofexchanger 31 itself, with the external environment. -
Exchanger 31 is mounted onbranch 19 upstream of theheating devices 20 indirection 26, and allows the hot air fed alongbranch 25, that is to say both the hot air fed throughnozzle 17 and the hot air fed throughvalve 28, to heat up the air under pressure fed alongbranch 19. - In the presence of
panel 2,valve 28 is moved to a closing position, in which thefirst segment 27 is closed to feed the hot air firstly throughnozzle 17, then againstedge 11, and finally along thesecond segment 29. - In the absence of
panel 2,valve 28 is moved to an opening position, in which the hot air is fed along thefirst segment 27. - According to a variant not shown, the
heat exchanger 31 is eliminated and theoutlet duct 30 is connected withbranch 19 upstream of theheating devices 20 indirection 26. - The variant illustrated in
figure 3 differs from that illustrated infigures 1 and2 in that, in it,exchanger 31 is eliminated and therecirculation branch 25 is eliminated and replaced with arecirculation branch 32 comprising arecirculation manifold 33 having an inlet connected withbranch 19 by means ofvalve 28 and, for eachconnector 23, arespective recirculation duct 34 configured to connectmanifold 33 withconnector 23 itself. - In the absence of
panel 2,valve 28 is opened and the hot air fed downstream ofnozzle 17 is recirculated again inside thefeeding branch 19 at least through theducts 34. - Each
duct 34 is provided with apressure adjusting device 35, which is configured to feed the hot air inside therelative connector 23 at a pressure that is at least equal to the pressure of the hot air inbranch 19, and to prevent a return of the hot air alongmanifold 33 and tonozzle 17. - Manifold 33 is connected with
branch 19 upstream of theheating devices 20 indirection 26, and is, furthermore, connected with the external environment by means of the interposition of a shut-offvalve 36. - The hot air is recirculated in the
recirculation ducts 34 and inbranch 19 whenvalve 36 is closed, while it is dispersed into the external environment whenvalve 36 is open. - About the above disclosure, it is suitable to point out that the hot air is recirculated in
branch 19 after having crossed apressure adjusting device 37 that is completely similar todevices 35. - The variant illustrated in
figure 4 differs from that illustrated infigures 1 and2 in that, in it, theconnectors 23 are eliminated and replaced withrespective heat exchangers 38 and therecirculation branch 25 is eliminated and replaced with arecirculation branch 39, which has an inlet connected withbranch 19 by means ofvalve 28, crosses theexchangers 38 in succession, and has an outlet connected with the external environment. - In the absence of
panel 2,valve 28 is opened and the hot air fed downstream ofnozzle 17 is fed along therecirculation branch 39 to heat up the air under pressure fed alongbranch 19. - According to a variant not shown,
branch 39 comprises a first segment extending in succession through theexchangers 38, and a second segment to heat up a tank containing the glue that is to be applied onto thelateral profile 4 ofpanel 2 or ontoedge 11. - Obviously, similarly to the
recirculation branch 25, eachrecirculation branch nozzle 17 to cause the hot air fed throughnozzle 17 itself to be recirculated. - The presence of the
recirculation branches outlet nozzle 17 to be reused to heat up the air under pressure fed along thefeeding branch 19 and/or to heat up the glue that is to be applied onto thelateral profile 4 ofpanel 2 or ontoedge 11.
Claims (9)
- A machine for edgebanding wood panels (2) or the like, each of which comprises two main faces (3), which are parallel and opposite to one another, and a lateral profile (4) extending between the main faces (3) themselves, the machine comprising a support surface (P) for at least one panel (2); an edgebanding assembly (10); actuator means (9) to move the panel (2) and the edgebanding assembly (10) relative to one another in at least one direction (6) that is parallel to the support surface (P) and to allow the edgebanding assembly (10) to apply a finishing edge (11) along at least part of the lateral profile (4) of the panel (2); and a feeding device (16) to feed a hot gas, in particular a hot gas under pressure, onto the finishing edge (11) and/or onto the lateral profile (4) of the panel (2), the feeding device (16) comprising a feeding branch (19), which is provided with at least one outlet (17), which is configured to direct the hot gas at the finishing edge (11) and/or at the lateral profile (4); and being characterised in that the feeding device (16) comprises, furthermore, a recirculation branch (25; 32) to cause at least part of the hot gas fed downstream of said outlet (17) to recirculate in the feeding branch (19).
- A machine according to claim 1 and comprising, furthermore, a plurality of heating devices (20), which are mounted in succession along the feeding branch (19) so as to heat up the gas; the recirculation branch (25; 32) being connected to the feeding branch (19) upstream of the heating devices (20) in a feeding direction (26) of the hot gas along the feeding branch (19) itself.
- A machine according to claim 1 or 2, wherein the feeding branch (19) and at least one inlet of the recirculation branch (25; 32) are connected to one another by a shut-off valve (28), which is mobile between a closing position, in which the feeding and recirculation branches (19, 25; 32) are separated from one another so at to allow the hot gas to flow through said outlet (17), and an opening position, in which the feeding and recirculation branches (19, 25; 32) communicate with one another so as to allow the hot gas to flow along the recirculation branch (32).
- A machine according to any of the previous claims and comprising, furthermore, a plurality of heating devices (20), which are mounted in succession along the feeding branch (19) so as to heat up the gas; the recirculation branch (32) comprising a recirculation manifold (33) and at least one recirculation duct (34), which is connected to the recirculation manifold (33) and, furthermore, is connected to the feeding branch (19) between two heating devices (20) that are adjacent to one another.
- A machine according to claim 4, wherein each recirculation duct (34) is provided with a pressure adjusting device (33) to selectively control the pressure of the hot gas fed by the recirculation duct (32) into the feeding branch (19).
- A machine according to any of the claims from 1 to 3, wherein the recirculation branch (25) comprises a first segment (27) having an inlet that is connected to the feeding branch (19) by means of the interposition of a shut-off valve (28), and a second segment (29) facing said outlet (17) so as to cause the hot gas fed through the outlet (17) itself to recirculate.
- A machine according to any of the previous claims and comprising, furthermore, a plurality of measuring devices (24) to measure the temperature of the hot gas in the feeding branch (19).
- A machine according to claim 7 and comprising, furthermore, a plurality of heating devices (20), which are mounted in succession along the feeding branch (19) so as to heat up the gas; each measuring device (24) being mounted between two adjacent heating devices (20).
- A machine according to any of the previous claims and comprising, furthermore, a holding tank for the glue used to connect the finishing edge (11) and the lateral profile (4) to one another; the recirculation branch (25; 32) being connected to the holding tank so as to heat up the glue itself.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITBO20140047 | 2014-02-04 |
Publications (3)
Publication Number | Publication Date |
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EP2902160A1 true EP2902160A1 (en) | 2015-08-05 |
EP2902160A8 EP2902160A8 (en) | 2015-09-30 |
EP2902160B1 EP2902160B1 (en) | 2018-05-23 |
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ID=50440728
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP15153849.3A Active EP2902160B1 (en) | 2014-02-04 | 2015-02-04 | Machine for edgebanding wood panels or the like |
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EP (1) | EP2902160B1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT201900024529A1 (en) * | 2019-12-18 | 2021-06-18 | Scm Group Spa | System for the edging of panels. |
EP4005758A1 (en) * | 2020-11-27 | 2022-06-01 | HOMAG GmbH | Device and method for coating a workpiece |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102019114105A1 (en) | 2019-05-27 | 2020-12-03 | Homag Gmbh | Method and device for coating workpieces |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4222812A (en) * | 1978-06-29 | 1980-09-16 | Lof Plastics, Inc. | Hot air edge banding machine |
DE10342723A1 (en) * | 2003-09-16 | 2005-08-04 | Delle Vedove Maschinenbau Gmbh | Gas heat exchanging device e.g. industrial blow dryer, for shroud station, has commutator-release fan motor with interior runner and designed as three-phase synchronous/asynchronous motor with frequency converter |
EP2428340A1 (en) * | 2010-09-14 | 2012-03-14 | Brandt Kantentechnik GmbH | Dosing arm kinematics |
WO2014019847A1 (en) * | 2012-08-03 | 2014-02-06 | Homag Holzbearbeitungssysteme Gmbh | Method and device for coating workpieces |
-
2015
- 2015-02-04 EP EP15153849.3A patent/EP2902160B1/en active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4222812A (en) * | 1978-06-29 | 1980-09-16 | Lof Plastics, Inc. | Hot air edge banding machine |
DE10342723A1 (en) * | 2003-09-16 | 2005-08-04 | Delle Vedove Maschinenbau Gmbh | Gas heat exchanging device e.g. industrial blow dryer, for shroud station, has commutator-release fan motor with interior runner and designed as three-phase synchronous/asynchronous motor with frequency converter |
EP2428340A1 (en) * | 2010-09-14 | 2012-03-14 | Brandt Kantentechnik GmbH | Dosing arm kinematics |
WO2014019847A1 (en) * | 2012-08-03 | 2014-02-06 | Homag Holzbearbeitungssysteme Gmbh | Method and device for coating workpieces |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT201900024529A1 (en) * | 2019-12-18 | 2021-06-18 | Scm Group Spa | System for the edging of panels. |
EP3838525A1 (en) * | 2019-12-18 | 2021-06-23 | SCM Group S.p.A. | System for edge banding of panels |
EP4005758A1 (en) * | 2020-11-27 | 2022-06-01 | HOMAG GmbH | Device and method for coating a workpiece |
Also Published As
Publication number | Publication date |
---|---|
EP2902160B1 (en) | 2018-05-23 |
EP2902160A8 (en) | 2015-09-30 |
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