EP1106313A2 - Procédé et appareil pour l'assemblage de feuilles de placage en bande continue - Google Patents

Procédé et appareil pour l'assemblage de feuilles de placage en bande continue Download PDF

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Publication number
EP1106313A2
EP1106313A2 EP00126671A EP00126671A EP1106313A2 EP 1106313 A2 EP1106313 A2 EP 1106313A2 EP 00126671 A EP00126671 A EP 00126671A EP 00126671 A EP00126671 A EP 00126671A EP 1106313 A2 EP1106313 A2 EP 1106313A2
Authority
EP
European Patent Office
Prior art keywords
glue
gluing
veneer
sections
profile
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.)
Withdrawn
Application number
EP00126671A
Other languages
German (de)
English (en)
Other versions
EP1106313A3 (fr
Inventor
Bernhard Huser
Bernd Huser
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.)
Huser Maschinenbau GmbH
Original Assignee
Huser Maschinenbau 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 Huser Maschinenbau GmbH filed Critical Huser Maschinenbau GmbH
Publication of EP1106313A2 publication Critical patent/EP1106313A2/fr
Publication of EP1106313A3 publication Critical patent/EP1106313A3/fr
Withdrawn legal-status Critical Current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
    • B27D1/00—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring
    • B27D1/10—Butting blanks of veneer; Joining same along edges; Preparatory processing of edges, e.g. cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27G—ACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
    • B27G11/00—Applying adhesives or glue to surfaces of wood to be joined

Definitions

  • the invention relates to a method for producing Veneer sheets from individual veneer sections, the individual Veneer sections zinc-coated at the ends and glued together become.
  • the invention also relates to a device to carry out the method, the device being a Device for applying glue in the area of front ends has marked ends of veneer sections.
  • the veneer strips that are usually zinc-coated at their connecting ends are pushed into each other to connect with these galvanized ends and then on the bottom of the veneer joint adhesive tape consisting of an adhesive-coated fleece upset. Then the adhesive is exposed to heat and reactivated pressure, with the reactivated adhesive somewhat in the parting line of the veneers penetrates and one with thin veneers forms a sufficiently durable connection.
  • veneers several millimeters thick are used can only use a part of the parting line in this way Glue are wetted, so that accordingly the connection strength is lower and therefore not consistently approximately uniform Strength of the material web is present. It is also disadvantageous that the joint open on one side on the visible side at a later Paint coating is visible.
  • glue-laminated boards individual boards into a stack and then the connection face to be profiled with a galvanizing cutter.
  • the glue is specified here preferably in spray technology or in the profiles engaging nozzles.
  • the object of the present invention is a method of the beginning mentioned type and an apparatus for performing the method to create what is practically the thickness of the used Veneer material independent, full-face gluing of the individual veneer sections possible and thus approximately continuous constant strength of the veneer sections veneer sheet formed can be achieved.
  • a gluing element be coated with glue from a glue supply and the adhering glue layer is stripped down to a predefinable wetting layer, that one end of the veneer section is then guided to the gluing element wetted with glue and glue from this wetting layer onto a front end of the Transfer veneer section and then the veneer sections are joined together with a veneer section to be connected.
  • This enables mechanical production of veneer webs of individual veneer sections which have a largely uniform strength throughout, since the ends are directly contacted with the glue-bearing glue element for glue transfer.
  • the ends of the veneer sections are wetted with glue over the entire veneer thickness, so that a gap-free, full-surface adhesive connection of the veneer section ends is present after the joining.
  • the wetting of the veneer sections with glue is independent of the thickness of the veneers, since contact is made directly on the end faces of the veneer sections.
  • the device according to the invention is characterized in that a veneer gluing device is provided which has a gluing element immersed in the glue supply for transporting glue from the glue supply to a gluing point, that within this glue transport path a glue stripping device for stripping glue adhering to the gluing element except for one Predefinable wetting layer is provided, and that a feed device is provided for feeding a veneer section with one end to the gluing point of the gluing element wetted with glue.
  • a veneer gluing device is provided which has a gluing element immersed in the glue supply for transporting glue from the glue supply to a gluing point, that within this glue transport path a glue stripping device for stripping glue adhering to the gluing element except for one Predefinable wetting layer is provided, and that a feed device is provided for feeding a veneer section with one end to the gluing point of the gluing element wetted with glue.
  • the glue adhering to the gluing element from the glue supply is stripped off by the glue stripping device to such an extent that a thin, constant glue film results for transfer to an end face of a veneer section.
  • glue is transferred to this end face.
  • the veneer section wetted at the end face with glue is then brought together and joined with another, glued veneer section.
  • the gluing element expediently has at least one length corresponding to the width of the connecting sides of the veneer sections. This means that the entire end face of a veneer section can be wetted with glue in one operation.
  • the distance between the glue stripping device and the gluing element can advantageously be changed, this distance between an in particular adjustable stripping position and a passage position being adjustable with an increased distance from the gluing element.
  • the adjustable stripping position allows the glue layer to be transferred to the veneer section to be varied and adapted to different circumstances, in particular the type of wood, the consistency of the glue and the like.
  • the thickness of the glue layer can be adjusted so that when joining two veneer sections to be joined, the entire surface of the end faces is wetted with glue, but a lateral pushing out of excess glue is avoided.
  • Adjusting the stripping element in a continuous position with a greater distance from the gluing element compared to the stripping position opens up the possibility of rinsing off particles that get caught on the gluing element due to the veneer sections coming into contact, i.e. usually wood particles, by passing the stripping element past the deactivated stripper is dipped into the glue supply with its gluing point.
  • the particles thus do not get caught on the stripping element of the glue stripping device, from where they could possibly get back into the area of the gluing point or could produce a glue-free track on the gluing element if the glue adhering to the gluing element is transported past the stripper to the gluing point.
  • the glue is usually one with a limited pot life, since two-component adhesives are preferably used. When the glue is changed, any particles returned to the glue supply are also removed, so that malfunctions due to these few particles in the glue are practically excluded.
  • the gluing element is a rotary, roller-shaped profile roller with a longitudinal profile complementary to the galvanizing profile of the veneer sections, which is immersed on the underside in the glue supply, that above the glue supply surface, the glue stripping device with a longitudinal profile Profile roll form-fitting, spaced wiping comb is arranged and that in the direction of rotation of the profile roll to the glue wiping device, the gluing point for contacting a veneer section is provided.
  • the glue from the glue supply is conveyed upwards past the scraper and the glue can then be removed from a veneer section that contacts the roller when the roller is at a standstill.
  • the profile roll expediently dips less than half of its cross-section into the glue supply and the take-off point, where a veneer section contacts, lies approximately at half the height of the profile roll, so that the respective veneer section can be fed laterally horizontally in radial extension.
  • the gluing element is designed as a pivotable glue comb with an end face that has a profile complementary to the galvanizing profile of the veneer sections, that the glue comb between a glue receiving position, where it dips into the glue supply with its profiled end face, and one Gluing position above the glue supply surface can be pivoted back and forth, and that within the pivoting path of the glue comb the glue stripping device is arranged with a stripping comb that is complementarily profiled to the profile of the glue comb.
  • a glue comb can be produced particularly easily, especially with regard to the galvanizing profile.
  • such a glue comb is easier to clean from glue than a profile roll.
  • a device 1 shown in FIGS. 1 to 4 is used to produce veneer sheets from individual veneer sections 2, 3.
  • the veneer sections 2, 3 are connected to a veneer sheet with the aid of a veneer gluing device 4, 4a and a pressing and heating device 5.
  • the device 1 shown in the figures has tine punching tools 8 in the feed area 6 and in the discharge area 7, with which the ends of the veneer sections 2, 3 can be pronged.
  • a veneer section 2 is first fed to the tine punching tool 8 arranged in the feed area 6 and is pronged there at its feed end.
  • This connecting side 9, which is provided with galvanizing tines, is then wetted with glue at the ends by means of the veneer gluing device 4 and then fed to the pressing and heating device 5.
  • the veneer section 3 can be the rear end in the feed direction of a veneer web already composed of several veneer sections. With the aid of the tine punching tool arranged on the discharge side, the rear end of this web or of the veneer section 3 is pronged and then brought together with the front end of the veneer section 2 within the pressing and heating device 5.
  • the position of the pressing and heating device 5 in the working position is shown in Fig. 4.
  • the veneer web is discharged to the left until the rear end is positioned in the area of the tine punching tool 8 on the discharge side.
  • the pressing and heating device 5 is retracted upward and the veneer gluing device 4, 4a is brought up into position in order to wet a new veneer section 2 fed from the feed side 6 with glue at the front end at the pronged end.
  • the pressing and heating device 5 and the veneer gluing device 4 and 4a are connected to lifting devices 35, 36, by means of which they can alternately be brought into the working position.
  • the veneer gluing device 4 shown in FIG. 1 has a gluing element 10 that is formed by a rotationally driven, roller-shaped profile roller 11.
  • the profile roll 11 has in its longitudinal extension a complementary to the galvanizing profile of the veneer sections 2, 3 longitudinal profile 12, so that the end face to be glued veneer section 2 with its prongs engage exactly in the profile 12 of the profile roll 11 can.
  • the veneer gluing device 4 furthermore has a trough-like container 13 for a glue supply 14, into which the profile roller 11 dips with its lower region up to a height of approximately one third of its diameter.
  • the container 13 also serves to support the profile roller 11, as can be seen clearly in FIG. 2.
  • the storage takes place via a thru axle 15, which can be pulled out laterally, so that a quick change of the profile roller 11 is possible, in particular for cleaning purposes.
  • the profile roller 11 is driven in rotation via a toothed wheel 16 (FIG. 2).
  • the veneer gluing device 4 and the pressing and heating device 5 are shown in FIG. 2 on both sides in the two different positions, on the one hand in the rest position and on the other hand in the working position.
  • the veneer gluing device 4 has a glue stripping device 17 with which glue adhering to the profile roll 11 can be stripped down to a predefinable wetting layer when the profile roll rotates and transports glue from the glue supply 14 to a gluing point 18.
  • This glue scraper device 17 has a complementary profiled scraper 19 to the profile of the profile roller 11, which is adjustable in its distance from the profile roller 11 so that a gap extending over the entire profile, the desired thickness of the glue wetting layer is available. As a result of the rotation of the profile roller 11, this wetting layer is transported up to the gluing point 18 or somewhat beyond and the profile roller 11 is then stopped.
  • the galvanized veneer section 2 at its gluing end is then guided with the galvanizing end to the gluing point 18 according to arrow Pf1 in FIG. 1, so that the glue wetting layer in the area of the gluing point 18 is transferred from the profile roller 11 to the zinc-coated end face of the veneer section 2 .
  • the veneer section 2 is pulled back into the starting position shown in FIG. 1, the veneer gluing device 4 is brought down from the working area into the position shown on the right in FIG. 2, while the pressing and heating device 5 is moved into the working position from above, as is the case this can also be seen on the right in FIG. 2.
  • the zinc-coated veneer section 3 is then inserted from the left and the zinc-coated veneer section 2, which is wetted with glue on the end face, is inserted between the open, heatable pressing jaws 20 (FIG. 4) and pressed tightly against one another.
  • the press jaws 20 are moved together and hold the connection point together until the glue has hardened, which is usually done in a few seconds.
  • the interconnected veneer sections 2, 3 are then transported to the left until the rear end of the original veneer section 2 is in the left-hand position shown in FIG. 2, like the veneer section 3. A new veneer section 2 is then fed in and the process described above begins again.
  • the profile roller 11 can be rotated counterclockwise. After the transfer of glue to the front end of the veneer section 2, the profile roller 11 can either be rotated further counterclockwise or moved back so far that the gluing point 18 is immersed in the glue supply 14. When the veneer section 2 contacts the profile roller 11, small wood particles can get caught on the profile roller 11. It is now possible to transport these adhering particles a little further after each gluing process while the direction of rotation of the profile roller 11 remains the same until they finally reach the glue supply 14 and are rinsed off there.
  • the scraper comb 19 is attached to a pivot lever 21 which is connected to an adjustment drive, not shown here, to the scraper comb 19 between the stripping position with a few tenths of a millimeter distance from the profile roller 11 and a continuous position, for example with or to be able to move several millimeters from the profile roller 11.
  • the glue used is usually a two-component adhesive with a limited pot life, so that the glue supply 14 must be changed within the pot life and the parts that come into contact with it must be cleaned. When changing glue, wood particles located in the glue supply 14 are also removed, so that the probability that they can get into the area of the gluing point 18 or get caught on the wiping comb 19 is low.
  • the profile roller 11 is preferably composed of a plurality of disk-shaped sections arranged side by side on a shaft. These sections each have a hub part with a rectangular cross-section and a radially outward adjoining, symmetrically pointed edge. This enables the very acute-angled galvanizing profiles to be realized.
  • FIG. 3 shows a device 1 a with a veneer gluing device 4 a, which works with a pivotable glue comb 22 instead of with a profile roller 11.
  • the device 1a corresponds in structure and function to the device 1 according to FIG. 1 and 2.
  • the glue comb 22 which can be seen particularly well in FIGS. 5 and 6 can be produced much more easily than the profile roller 11, since the glue comb 22 is a flat part with an approximately rectangular outline, in one longitudinal side of which the galvanizing profile is incorporated. This galvanizing profile can be introduced very precisely, for example by wire EDM, a high profile accuracy being achievable.
  • the glue comb 22 can be pivoted back and forth between the glue receiving position shown in dash-dotted lines in FIG.
  • the glue comb 22 is connected to a pivot bearing 25 on its longitudinal side opposite the provilated end face 24.
  • a swivel drive 26 is preferably coupled in the form of a rotating cylinder.
  • the pivot bearing 25 has a thru axle 15a, after which the glue comb 22 can be removed.
  • the pivot bearing 25 of the glue comb 22 is attached to the container 13a for the glue supply 14.
  • the thickness of the glue comb 22 designed as a flat part is dimensioned such that it corresponds at least to the thickness of a veneer to be glued, a larger thickness of the glue comb 22 being provided, among other things, to compensate for positioning inaccuracies.
  • the stripping comb 19a of the glue stripping device 17a is arranged between the gluing position and the glue receiving position of the glue comb 22.
  • the scraper comb 19a is fastened to an angle lever 27 which can be pivoted with the aid of a lifting drive 28 from the dot-dash passage position against the force of a compression spring 29 into a stripping position of the scraper comb 19a limited by a stop 30.
  • the angle lever 27 is mounted on its end facing away from the scraper comb 19a, this pivot bearing 31 being attached to the container 13a.
  • this assembly can be pulled laterally out of the overall device after a lock has been released and, if necessary, can be replaced, for example for cleaning purposes.
  • the stripping comb 19a shown in FIG. 5 the stripping comb is located directly below the glue comb 22 which is in the gluing position and thereby forms a guide support on the underside for a veneer section 2 to be supplied.
  • the top of the container 1 3a is provided with a cover 32 which is bent inwards at the feed end of the veneer section 2 and forms a height guide for the veneer section 2 with this bent section 33 together with the wiping comb 19a.
  • the veneer gluing device 4a In connection with the veneer gluing device 4a shown in detail in FIGS. 5 and 6, the arrangement of this veneer gluing device 4a within the device 1a is shown in different positions in FIGS. 3 and 4.
  • the veneer gluing device 4a In Fig. 3, the veneer gluing device 4a is in the working position, in which it is located with the glue comb 22, which is approximately in the horizontal gluing position, in one plane with the two supports 34 belonging to the tine punching tools 8.
  • Fig. 4 the veneer gluing device 4a is positioned downwards and the press and heater 5 is now in Working position in which the veneer sections 2, 3 on both sides retracted between the heated press jaws 20 and the on Veneer section 2 applied glue after merging with the veneer section 3 can harden.
  • Veneer sheets can be made with the device 1, 1a according to the invention from individual veneer sections, with the optional different veneer thicknesses can be processed.
  • comparatively thick veneers can also be used connect, whereby through the full-surface, frontal glue application a high connection strength is given.
  • the veneer thicknesses can for example less than 1 millimeter, but also 5 millimeters and more.
  • compressed veneer sections be connected to each other, so that even for special applications almost endless material is available.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Veneer Processing And Manufacture Of Plywood (AREA)
EP00126671A 1999-12-07 2000-12-05 Procédé et appareil pour l'assemblage de feuilles de placage en bande continue Withdrawn EP1106313A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1999158858 DE19958858C2 (de) 1999-12-07 1999-12-07 Verfahren und Vorrichtung zum Herstellen von Furnierbahnen aus einzelnen Furnierabschnitten
DE19958858 1999-12-07

Publications (2)

Publication Number Publication Date
EP1106313A2 true EP1106313A2 (fr) 2001-06-13
EP1106313A3 EP1106313A3 (fr) 2002-06-05

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EP00126671A Withdrawn EP1106313A3 (fr) 1999-12-07 2000-12-05 Procédé et appareil pour l'assemblage de feuilles de placage en bande continue

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EP (1) EP1106313A3 (fr)
DE (1) DE19958858C2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107691543A (zh) * 2017-09-30 2018-02-16 重庆市奇格食品有限公司 一种和面装置
WO2022017729A1 (fr) * 2020-07-23 2022-01-27 Ima Schelling Deutschland Gmbh Système d'application d'agent adhésif et procédé d'application d'un agent adhésif sur une bande de chant
CN114131708A (zh) * 2021-12-31 2022-03-04 广东顺德永强福泰智能木工机械有限公司 一种木材指接板智能涂胶设备

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10140398C2 (de) * 2001-08-17 2003-06-26 Kuper Heinrich Gmbh Co Kg Verfahren und Vorrichtung zur Stumpfverleimung von Furnierblättern
DE102007046827B4 (de) * 2007-09-29 2021-02-04 Grecon Dimter Holzoptimierung Nord Gmbh & Co. Kg Verfahren zur Klebstoffübertragung auf Werkstücke und Einrichtung zur Durchführung dieses Verfahrens
CN114347204B (zh) * 2021-12-29 2022-12-16 山东德才建设有限公司 错位抖动式木塑地板用竹条板浸胶设备

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2890677A (en) * 1957-10-15 1959-06-16 Timber Structures Inc Finger joint gluer
JPS4612319B1 (fr) * 1968-08-03 1971-03-30
JPS5179709A (en) * 1974-12-27 1976-07-12 Kikukawa Iron Works Nagasano futeina tanpanmataha hikiitasozaikarashomono nagasano sozaio seizosuru hoho oyobi sonosochi
DE3526372A1 (de) * 1985-07-24 1987-02-05 Rueckle Carl Maschinenbau Einrichtung zum verarbeiten von furnieren
DE3528019A1 (de) * 1985-08-05 1987-02-12 Erwin Haug Maschinenbau Gmbh Beleimungsvorrichtung zum beleimen von stosskanten
EP0246488A2 (fr) * 1986-05-14 1987-11-25 T.A.F. Technologie, Anlagen- und Furnier-Import-Export AG Procédé et dispositif pour joindre des extrémités de placage
JPH09216207A (ja) * 1996-02-14 1997-08-19 Taihei Mach Works Ltd フィンガージョインターの糊付け装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1050048B (fr) * 1959-02-05
SE130136C1 (fr) * 1946-12-21 1950-11-21
GB1172682A (en) * 1966-03-04 1969-12-03 Aaronson Bros Ltd Improvements in or relating to Wood Veneer.

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2890677A (en) * 1957-10-15 1959-06-16 Timber Structures Inc Finger joint gluer
JPS4612319B1 (fr) * 1968-08-03 1971-03-30
JPS5179709A (en) * 1974-12-27 1976-07-12 Kikukawa Iron Works Nagasano futeina tanpanmataha hikiitasozaikarashomono nagasano sozaio seizosuru hoho oyobi sonosochi
DE3526372A1 (de) * 1985-07-24 1987-02-05 Rueckle Carl Maschinenbau Einrichtung zum verarbeiten von furnieren
DE3528019A1 (de) * 1985-08-05 1987-02-12 Erwin Haug Maschinenbau Gmbh Beleimungsvorrichtung zum beleimen von stosskanten
EP0246488A2 (fr) * 1986-05-14 1987-11-25 T.A.F. Technologie, Anlagen- und Furnier-Import-Export AG Procédé et dispositif pour joindre des extrémités de placage
JPH09216207A (ja) * 1996-02-14 1997-08-19 Taihei Mach Works Ltd フィンガージョインターの糊付け装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1997, no. 12, 25. Dezember 1997 (1997-12-25) -& JP 09 216207 A (TAIHEI MACH WORKS LTD), 19. August 1997 (1997-08-19) *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107691543A (zh) * 2017-09-30 2018-02-16 重庆市奇格食品有限公司 一种和面装置
WO2022017729A1 (fr) * 2020-07-23 2022-01-27 Ima Schelling Deutschland Gmbh Système d'application d'agent adhésif et procédé d'application d'un agent adhésif sur une bande de chant
CN114131708A (zh) * 2021-12-31 2022-03-04 广东顺德永强福泰智能木工机械有限公司 一种木材指接板智能涂胶设备

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Publication number Publication date
DE19958858A1 (de) 2001-06-28
DE19958858C2 (de) 2003-11-20
EP1106313A3 (fr) 2002-06-05

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