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EP0983829A1 - Procédé et appareil pour le collage de feuilles de placage - Google Patents

Procédé et appareil pour le collage de feuilles de placage Download PDF

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Publication number
EP0983829A1
EP0983829A1 EP98116423A EP98116423A EP0983829A1 EP 0983829 A1 EP0983829 A1 EP 0983829A1 EP 98116423 A EP98116423 A EP 98116423A EP 98116423 A EP98116423 A EP 98116423A EP 0983829 A1 EP0983829 A1 EP 0983829A1
Authority
EP
European Patent Office
Prior art keywords
adhesive
veneer
curing
veneer strips
strips
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.)
Granted
Application number
EP98116423A
Other languages
German (de)
English (en)
Other versions
EP0983829B1 (fr
Inventor
Carsten Runge
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.)
Heinrich Kuper GmbH and Co KG
Original Assignee
Heinrich Kuper GmbH and Co KG
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
Priority to DE19737593A priority Critical patent/DE19737593C1/de
Application filed by Heinrich Kuper GmbH and Co KG filed Critical Heinrich Kuper GmbH and Co KG
Priority to ES98116423T priority patent/ES2264807T3/es
Priority to DK98116423T priority patent/DK0983829T3/da
Priority to EP98116423A priority patent/EP0983829B1/fr
Publication of EP0983829A1 publication Critical patent/EP0983829A1/fr
Application granted granted Critical
Publication of EP0983829B1 publication Critical patent/EP0983829B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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

Definitions

  • the invention relates to a method and a device for gluing veneer strips on their butt edge.
  • butt glue is essentially PVAc or urea glue used by means of reactive processes or active processes be glued.
  • the veneer edges are previously on Veneer package in a first process step with adhesive provided that dries in the air.
  • adhesive provided that dries in the air.
  • the veneers are actually glued in an additional step.
  • the adhesive is used for gluing reactivated by exposure to heat and the veneer edges pressed together.
  • the curing of the PVAc adhesives and urea glue takes place under the influence of pressure and Heat by removing water and polymerizing. With urea glues a longer pressure and heat zone is required.
  • the hardened urea joint can be contrasted Do not soften or reactivate the PVAc joint.
  • Disadvantageous Reactive experience means effort and time for the additional step for pre-gluing, the corresponding machines and procedures pulls.
  • the veneer edges are directly in the Longitudinal joint gluing machine immediately before merging glued in the heating and pressure zone.
  • a problem The active process for PVAc adhesives is that the adhesive has to go through a longer printing and cooling section must to achieve a fast turnaround time and on End up being cured too. Also with urea adhesives long heating distances are required for heat transfer. This leads to long machines for veneer gluing and especially for a partial drying of the veneers, because due to the heat transfer not only the adhesive joints, but also the areas around the joints are also heated. This partial drying leads to tension in the veneer strips, which is a direct sticking together of a multitude of veneer strips makes it very difficult.
  • EP-0 403 024 describes a method and a device Known for gluing layers of wood together with the glue is applied, the layers are brought together and then curing the adhesive in at least three steps. The is carried out at three curing points Curing by means of a printhead, each Apply pressure and heat from above and below to the adhesive joint and allow the adhesive joint to harden gradually. Curing takes place, for example, by high-frequency gluing.
  • EP-0 403 024 is used for side compression the adhesive edges of the layers and that The adhesive cures one after the other. First they are Butt edges merged and then the glue cured by means of the printheads, the printheads Only apply pressure from above or below. This requires additional Process steps and a complex gluing machine with large dimensions in the longitudinal direction. It is also not possible to apply heat specifically to the adhesive joint, but heat is also on the side veneer areas transfer, resulting in the voltages described above in the veneers.
  • the invention has for its object a method or to create a device which is simple and economical gluing of veneer strips to your Allow butt edge.
  • the compression takes place the veneer strips on the butt edges at the same time as the Hardening of the adhesive by means of electromagnetic waves.
  • the method according to the invention is characterized by this a number of advantages. By squeezing at the same time and curing the adhesive joint becomes very small kept so that the adhesive joint is extremely inconspicuous. There curing takes place by means of electromagnetic waves, can target the energy required for curing in a targeted and contactless manner be introduced into the adhesive joint. Thereby can control the curing of the adhesive very well become. A drying of the areas of the veneer near the joints does not or only finds through the electromagnetic waves very little instead, so that none in the veneer strips Tension arises from dried veneer sections.
  • Electromagnetic waves are preferably used, which in Vacuum have a length of less than 10 cm. By the simultaneous compression and curing is reduced also the necessary number of work steps and the economy the procedure is increased. By using it Electromagnetic waves are also eliminated, e.g. at heat transfer by means of heating rails Problems with drying areas close to joints or with impressions heating rails on veneers or smearing of heating rails or other components by still not set adhesive.
  • the adhesive is preferably cured by means of microwaves with a wavelength range in a vacuum of 10 cm up to 1 mm. This also makes today's bonding used urea glues possible.
  • microwaves can target a high energy density in a targeted and contactless manner the glue line is inserted. Through the microwaves only dipoles vibrated, the vibration is converted into heat by friction and to harden the Leads adhesive. Due to the high energy density of microwaves the curing time of the adhesives is reduced and the Processing times for gluing the veneer strips can be reduced.
  • An adhesive is preferred for curing by means of microwaves used, which is essentially made up with water Is a condensation product.
  • a Resin consisting of urea and formaldehyde is used become.
  • the adhesive is preferably dried and hardened in one operation, with the transition between drying and hardening is fluent. It is also possible to use electromagnetic Waves in the reactive process in the first Use the glue drying step.
  • Another advantageous embodiment of the invention results themselves when using ultraviolet radiation Hardening that is in a vacuum between 4000 ⁇ and 100 ⁇ . Even with this electromagnetic radiation there are advantages of bringing a high Energy density that is non-contact and targeted in the adhesive joint can be introduced. For example, if a for ultraviolet radiation sensitive adhesive through a cover (e.g. a glass pane) protected, can be practical Realize infinitely long pot lives.
  • a cover e.g. a glass pane
  • Another significant advantage of the invention is that if the ultraviolet radiation using an eximer lamp is produced. Because the eximer heater is only ultraviolet Generates radiation, the adhesive can work without the influence of Heat on adhesive joint or veneer. In order to cannot create any tension on the veneer caused by heat arise.
  • An adhesive for ultraviolet rays is advantageous sensitized glue based on polyurethane.
  • different Radiations can be used to harden the adhesive.
  • Correspondingly sensitized adhesives can e.g. by Irradiation using laser light, UV light or gamma rays be hardened.
  • Glue or type of radiation is used depending on the type of veneer or the nature of the base material, to which the veneer is applied.
  • a device according to the invention for gluing veneer strips at its butt edge is characterized in that a production device in a curing unit of electromagnetic waves and means of compression the veneer strip includes.
  • the device and the Means are arranged so that the veneer strips on the glued joint side are pressed together and the adhesive simultaneously by means of electromagnetic Waves is cured.
  • electromagnetic Waves are used that are one wavelength in vacuum of less than 10 cm. Will such Shafts used can vary the length of the curing unit should be kept small as the time for the adhesive to harden is significantly reduced.
  • the adhesive unit advantageously comprises a rotating disk, with which the adhesive simply and dosed onto the veneer edges can be applied.
  • the device of the curing unit preferably generates microwaves, with a wavelength in a vacuum between 10 cm and 1 mm.
  • the microwaves have a high energy density that are introduced into the adhesive joint in a targeted and contactless manner can be.
  • the microwaves can e.g. by Magnetrons are generated.
  • the device generates the curing unit ultraviolet radiation with a wavelength in the range between 4000 ⁇ and 100 ⁇ . This can the energy required for curing is also targeted and be introduced without contact.
  • the only figure shows a highly schematic representation a device according to the invention.
  • a device according to the invention shown in the figure comprises a feed unit 1, an adhesive unit 2 and a Curing unit 3.
  • the individual veneer strips are through the feed unit 1 fed to the adhesive unit 2.
  • This can e.g. by means of driven Rollers or other suitable transport equipment respectively.
  • the adhesive unit 2 is at least an adhesive is applied to a joint edge of the veneer. This is done, for example, with a rotating one Disc that picks up adhesive from a reservoir and it partially applied to a veneer edge.
  • the curing unit 3 includes means for compressing the strips of veneer and a device for generating electromagnetic waves.
  • the veneer strips are fed into the curing unit 3 and compressed by the means at their abutting edges.
  • the adhesive is preferred cured by means of microwaves or UV radiation.
  • this can also be done method according to the invention are carried out. After application of the adhesive on the butt edge of the veneer strips the veneer strips pressed together at their butt edge and the adhesive at the same time preferably by means of microwaves or cured ultraviolet radiation.

Landscapes

  • 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)
  • Adhesives Or Adhesive Processes (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
EP98116423A 1997-08-28 1998-08-31 Procédé et appareil pour le collage de feuilles de placage Expired - Lifetime EP0983829B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE19737593A DE19737593C1 (de) 1997-08-28 1997-08-28 Verfahren und Vorrichtung zum Verkleben von Furnierstreifen
ES98116423T ES2264807T3 (es) 1997-08-28 1998-08-31 Procedimiento y dispositivo para pegar bandas de chapa de madera.
DK98116423T DK0983829T3 (da) 1997-08-28 1998-08-31 Fremgangsmåde og apparat til at lime finerstrimler
EP98116423A EP0983829B1 (fr) 1997-08-28 1998-08-31 Procédé et appareil pour le collage de feuilles de placage

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19737593A DE19737593C1 (de) 1997-08-28 1997-08-28 Verfahren und Vorrichtung zum Verkleben von Furnierstreifen
EP98116423A EP0983829B1 (fr) 1997-08-28 1998-08-31 Procédé et appareil pour le collage de feuilles de placage

Publications (2)

Publication Number Publication Date
EP0983829A1 true EP0983829A1 (fr) 2000-03-08
EP0983829B1 EP0983829B1 (fr) 2006-06-07

Family

ID=26039531

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98116423A Expired - Lifetime EP0983829B1 (fr) 1997-08-28 1998-08-31 Procédé et appareil pour le collage de feuilles de placage

Country Status (4)

Country Link
EP (1) EP0983829B1 (fr)
DE (1) DE19737593C1 (fr)
DK (1) DK0983829T3 (fr)
ES (1) ES2264807T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015208386A1 (de) 2015-05-06 2016-11-10 Heinrich Kuper Gmbh & Co Kg Vorrichtung und Verfahren zum Zusammensetzen von Furnierstreifen

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004052871A1 (de) * 2004-11-02 2006-05-04 Heinrich Kuper Gmbh & Co Kg Vorrichtung und Verfahren zum Verbinden von dünnen, flächigen Elementen
DE102013010108B4 (de) * 2013-06-18 2016-08-18 Püschner GmbH + Co. KG Verfahren zur Herstellung eines bemaßten Materials, insbesondere einer Furnierschichtholzplatte
FI129331B (fi) * 2017-03-07 2021-12-15 Lemtapes Oy Menetelmä ja laite liima-aineen aktivoimiseksi
CN114260987B (zh) * 2021-12-28 2022-07-15 南京林业大学 一种无醛高强度的微波固化胶合板的制备方法

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE487545A (fr) *
US3021248A (en) * 1955-04-04 1962-02-13 Julius W Mann Radio-frequency edge-gluing process
DE3304315A1 (de) * 1983-02-09 1984-08-09 Heinrich Kuper GmbH & Co KG, 4835 Rietberg Furnier-zusammensetzmaschine
JPS59187071A (ja) * 1983-04-07 1984-10-24 Nippon Kasei Kk 生単板横はぎ用接着剤
JPS6072973A (ja) * 1983-09-30 1985-04-25 Nippon Kasei Kk なま単板横はぎ用接着剤
JPH02139810A (ja) * 1988-11-21 1990-05-29 Matsushita Electric Ind Co Ltd 超電導体の製造方法
JPH02225001A (ja) * 1989-02-27 1990-09-07 Eidai Co Ltd 化粧材の製造方法およびその化粧材を使用した化粧板の製造方法
JPH04104866A (ja) * 1990-08-22 1992-04-07 Toppan Printing Co Ltd 化粧板の製造方法
US5364333A (en) * 1990-07-19 1994-11-15 Gulf States Paper Corporation Tamper evident consumer product package, windowed flat blank used therein, and method and apparatus for making the same
WO1996005035A1 (fr) * 1994-08-12 1996-02-22 Schilcher Industrieanlagen- Und Gerätebau Gesellschaft M B H Dispositif de chauffage pourvu d'un generateur de micro-ondes
WO1996027482A1 (fr) * 1995-03-06 1996-09-12 Stenlund Maskiner Ab Procede et dispositif permettant de chauffer des assemblages par collage
EP0830924A2 (fr) * 1996-09-23 1998-03-25 Meinan Machinery Works, Inc. Procédé et dispositif pour coller des plaques de contreplaqué non séché

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1041187B (de) * 1957-02-22 1958-10-16 Henkel & Cie Gmbh Verfahren zur Fugenverleimung von Holzfurnieren und Klebmittel zur Durchfuehrung dieses Verfahrens
CH659617A5 (de) * 1983-05-04 1987-02-13 Fischer Ag Brugg Georg Einrichtung zum zusammensetzen und verbinden von flaechigen werkstuecken.
NL8901501A (nl) * 1989-06-14 1991-01-02 Stephanus Petrus Van Sterkenbu Werkwijze en inrichting voor het aan elkaar lassen van uit houtachtig materiaal bestaande platen.
JPH0615610A (ja) * 1992-03-31 1994-01-25 Mitsui Toatsu Chem Inc 合板の製造方法

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE487545A (fr) *
US3021248A (en) * 1955-04-04 1962-02-13 Julius W Mann Radio-frequency edge-gluing process
DE3304315A1 (de) * 1983-02-09 1984-08-09 Heinrich Kuper GmbH & Co KG, 4835 Rietberg Furnier-zusammensetzmaschine
JPS59187071A (ja) * 1983-04-07 1984-10-24 Nippon Kasei Kk 生単板横はぎ用接着剤
JPS6072973A (ja) * 1983-09-30 1985-04-25 Nippon Kasei Kk なま単板横はぎ用接着剤
JPH02139810A (ja) * 1988-11-21 1990-05-29 Matsushita Electric Ind Co Ltd 超電導体の製造方法
JPH02225001A (ja) * 1989-02-27 1990-09-07 Eidai Co Ltd 化粧材の製造方法およびその化粧材を使用した化粧板の製造方法
US5364333A (en) * 1990-07-19 1994-11-15 Gulf States Paper Corporation Tamper evident consumer product package, windowed flat blank used therein, and method and apparatus for making the same
JPH04104866A (ja) * 1990-08-22 1992-04-07 Toppan Printing Co Ltd 化粧板の製造方法
WO1996005035A1 (fr) * 1994-08-12 1996-02-22 Schilcher Industrieanlagen- Und Gerätebau Gesellschaft M B H Dispositif de chauffage pourvu d'un generateur de micro-ondes
WO1996027482A1 (fr) * 1995-03-06 1996-09-12 Stenlund Maskiner Ab Procede et dispositif permettant de chauffer des assemblages par collage
EP0830924A2 (fr) * 1996-09-23 1998-03-25 Meinan Machinery Works, Inc. Procédé et dispositif pour coller des plaques de contreplaqué non séché

Non-Patent Citations (5)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 009, no. 045 (C - 268) 26 February 1985 (1985-02-26) *
PATENT ABSTRACTS OF JAPAN vol. 009, no. 205 (C - 299) 22 August 1985 (1985-08-22) *
PATENT ABSTRACTS OF JAPAN vol. 014, no. 380 (E - 0965) 16 August 1990 (1990-08-16) *
PATENT ABSTRACTS OF JAPAN vol. 014, no. 532 (M - 1051) 22 November 1990 (1990-11-22) *
PATENT ABSTRACTS OF JAPAN vol. 016, no. 349 (C - 0967) 28 July 1992 (1992-07-28) *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015208386A1 (de) 2015-05-06 2016-11-10 Heinrich Kuper Gmbh & Co Kg Vorrichtung und Verfahren zum Zusammensetzen von Furnierstreifen
DE102015208386B4 (de) 2015-05-06 2022-06-15 Heinrich Kuper Gmbh Vorrichtung zum Zusammensetzen von Furnierstreifen

Also Published As

Publication number Publication date
EP0983829B1 (fr) 2006-06-07
ES2264807T3 (es) 2007-01-16
DK0983829T3 (da) 2006-10-09
DE19737593C1 (de) 1999-03-04

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