EP1192026B1 - Procede pour coller des baguettes en bois afin de former des blocs de baguettes composites et machine pour mettre en oeuvre ce procede - Google Patents

Procede pour coller des baguettes en bois afin de former des blocs de baguettes composites et machine pour mettre en oeuvre ce procede Download PDF

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Publication number
EP1192026B1
EP1192026B1 EP00927162A EP00927162A EP1192026B1 EP 1192026 B1 EP1192026 B1 EP 1192026B1 EP 00927162 A EP00927162 A EP 00927162A EP 00927162 A EP00927162 A EP 00927162A EP 1192026 B1 EP1192026 B1 EP 1192026B1
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EP
European Patent Office
Prior art keywords
strips
travel
suited
along
conveyor belt
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.)
Expired - Lifetime
Application number
EP00927162A
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German (de)
English (en)
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EP1192026A2 (fr
Inventor
Pier Luigi Franchin
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.)
A COSTA SpA
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A COSTA SpA
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Publication date
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Publication of EP1192026A2 publication Critical patent/EP1192026A2/fr
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Anticipated expiration legal-status Critical
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27M—WORKING OF WOOD NOT PROVIDED FOR IN SUBCLASSES B27B - B27L; MANUFACTURE OF SPECIFIC WOODEN ARTICLES
    • B27M3/00—Manufacture or reconditioning of specific semi-finished or finished articles
    • B27M3/04—Manufacture or reconditioning of specific semi-finished or finished articles of flooring elements, e.g. parqueting blocks
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27M—WORKING OF WOOD NOT PROVIDED FOR IN SUBCLASSES B27B - B27L; MANUFACTURE OF SPECIFIC WOODEN ARTICLES
    • B27M3/00—Manufacture or reconditioning of specific semi-finished or finished articles
    • B27M3/0013—Manufacture or reconditioning of specific semi-finished or finished articles of composite or compound articles
    • B27M3/0086—Manufacture or reconditioning of specific semi-finished or finished articles of composite or compound articles characterised by connecting using glue

Definitions

  • the invention concerns a method of gluing strips of wood to produce composite strip blocks in general, especially suited for producing parquet strips and the machine suited to performing this method.
  • the strips that are used for producing parquet are made from a panel of hardwood glued onto a backing that can be made of one or more softwood strips.
  • a strip is placed on a work table and is covered with a hardwood panel, after having spread an adhesive substance over the contact surfaces.
  • the composite strip block thus prepared then undergoes the action of a press until the glue has set.
  • the strip that constitute the backing is scored crossways with a series of parallel cuts, uniformly spaced along its length that provide the strip with enough flexibility to allow it to adapt to the surface where it is laid.
  • the main inconvenience of this method is that the whole work cycle cannot be performed by continuous throughfeed, since a worker is required to transfer the strip block obtained at the exit of the press to the subsequent milling process.
  • JP-A-02,265,747 discloses the manifacture of a composite plate material by producing a gap on the outer periphery side of the facing and face to a neighboring piece of each piece arranged laterally on a curved transferring path. The gap between each piece depends on the curve reached by each piece during the transfer.
  • Another known method that partly solves some of the aforesaid inconveniences, prescribes that a series of strips are set in line, one after another and side by side on a flat surface crossways to a selected direction and that they are then uniformly spaced so that, after having applied a coat of glue, the hardwood panel can be bonded to them.
  • a known machine that performs the above method prescribes that the strips are set side by side on a work table and one by one they are picked up using a series of suction cups overhanging each strip.
  • the suction cups first move apart, spacing the actual strips and then lay the strips back on the worktable.
  • the panel of hardwood is applied, thereby obtaining the strip block that is then put under the action of a press until the glue has set.
  • the main inconvenience of the machine described above is that the strip spacing operations, performed by suction cups, have a significant effect on the average time for the work cycle of each individual strip, which duly reflects on production costs.
  • This invention intends to overcome these inconveniences.
  • a first scope of this invention is to provide a method of gluing strips of wood to produce composite strip blocks that glues strips and hardwood panel together in an automated and continuous throughfeed cycle.
  • Another scope is to provide a method that does not require manual interventions by a worker.
  • Another scope is to produce a gluing machine that allows to perform the method under this invention.
  • An additional scope is for the gluing to allow a reduction in production costs per unit product against known types of gluing machines.
  • a scope is that the gluing invention reproduces a constant standard of finished product.
  • the gluing machine for wooden strips also part of this invention and suited to performing the aforementioned method, comprises a frame that holds:
  • An advantage of the method described above is that it allows to produce parquet strips without any intervention whatsoever from a worker.
  • Another advantage of the method and the machine under this invention is that they allow to reduce the work cycle time for producing each single parquet strip, permitting to diminish production costs and therefore the sales price of the finished product.
  • the method of gluing strips of wood to produce composite strip blocks under this invention comprises the following operations:
  • the strips are spaced in sequence, one after another, by a substantially constant distance along the direction of travel, before laying the panel over them and after having spread the adhesive.
  • each strip can be spaced by slowing down each strip with respect to those upstream, again with reference to the direction of travel.
  • It comprises a frame 2 that holds a first feed line 3 having a first conveyor belt 4 that creates a straight direction of travel 11 for the strips L, which are set crossways, side by side to each other, and a second feed line 5 having a second conveyor belt 6 that creates a second straight direction of travel 110 for a series of hardwood panels P, set lengthways, one after another.
  • the frame also holds a glue spreader unit 7 mounted above the first conveyor belt 4, a laminating station 8 where the overlying feed lines 5 and 3 converge together to bond the panels P onto the underlying strips L producing the strip block S and a pressing station, generally indicated by 9, equipped with means of pressing, not illustrated, suited to pressing the strip block S.
  • the invention prescribes that the gluing machine 1, comprises a spacer unit 10, suited to spacing the strips L in sequence one after another by a substantially constant distance along the direction of travel 11, mounted upstream to the laminating station 8.
  • the spacer unit 10 is mounted upstream to the spreader unit 7 and comprises, as illustrated in detail in figures 2 to 4, means of propulsion for advancing the strips L, generally indicated by 12, which are followed by a slideway 30 suited to feeding the pair of drag belts 14 shown in detail in fig. 3.
  • the drag belts 14 are facing each other and separated by a distance 15 basically equal to the length of the strips L and are suited to rubbing against the ends of the actual strips L to speed them up along the direction of travel 11, spacing them by a substantially constant distance 16.
  • the means of propulsion 12 comprise a pair of spur gears 17 facing each other, where one can be seen in detail in fig.'s 3 and 4 positioned downline to the first conveyor belt 4 with their axis of rotation 18 being basically horizontal and set crossways to the direction of travel 11.
  • Each spur gear 17 has thrust teeth 17a protruding from the surface defined by the first conveyor belt 4, which work with backstop devices 20 mounted above said thrust teeth to withhold/push the strips L along the direction of travel 11.
  • Said shaped backstop devices 20 comprise a plate 21 with an essentially longitudinal construction with one end elastically pivoted to the frame 2 by a pin 22 and an elastic device comprising a spring 24.
  • the plate 21 also has a cavity 23 suited to receiving, as will be seen below, the strip L to hold it along the direction of travel 11.
  • the glue spreader unit 7 comprises an adhesive reservoir 7a that feeds a spreader 7b, suited to depositing a uniform coat of glue onto the strips L.
  • the laminating station 8 comprises means of combining, not illustrated, suited to joining the strips L and the panels P together after their are laid over each other, thereby producing the composite strip block S.
  • the gluing machine 1 prescribes that the strips L supplied by a feed unit, not illustrated, travel along direction 11 carried by the conveyor belt 4 to feed the spacer unit 10 while meantime the second conveyor belt 6 converges the hardwood panels P towards the means of laminating 8.
  • the tooth 17a of the spur gear 17 lifts the strip La pushing it towards the cavity 23 in the plate 21 which flexes to adapt to the thickness of the strip by rocking on the pivot 22.
  • the spur gear 17 continues to travel and drops the strip La, as illustrated in fig. 7, in the well created by the space between the two consecutive teeth 17a and 17b thereby allowing tooth 17b to push the strip La towards the slideway 30 and thereby making all the strips found downline advance by a step.
  • the machine provides a fine, precise control over the speed of feeding first the glue spreader unit 7 and then the pair of drag belts 14 which uniformly space each strip L.
  • the strips L spaced accordingly are collected by an outlet conveyor belt 31 that feeds the laminating station 8 which produces the strip block S that is pressed in the following pressing station 9 after which the parquet strip T has been solidified and is ready for storage.
  • each tooth on the spur gear 17 constitutes the maximum limit in the width of strips L that can be processed by the gluing machine 1.
  • the strips L advance along the slideway 30, set perfectly side by side and crossways to the direction of travel thereby forming a uniform surface to receive the adhesive that is deposited by the spreader unit.
  • the two spur gears 17 are set towards the ends of the strips L and parallel to each other in order to ensure the strips L are in a perpendicular position to the direction of travel.

Claims (8)

  1. Méthode de collage de lames de bois pour la réalisation de blocs composites de lames de bois comprenant les opérations suivantes:
    positionnement d'une série de lames de bois l'une à côté de l'autre, transversalement par rapport à une direction de translation droite;
    avancement desdites lames de bois lelong de ladite direction de translation droite;
    distribution d'une couche uniforme de colle sur lesdites lames;
    espacement desdites lames l'une après l'autre avec une distance essentiellement constante lelong de ladite direction de translation;
    installation d'un panneau sur la surface desdites lames couvertes par ladite couche de colle;
    pression desdites lames et dudit panneau pour l'obtention dudit bloc composite de lames de bois;
    caractérisée en ce que lesdites lames sont espacées l'une de l'autre par l'accélération de chacune de celles-ci par rapport à la lame en amont dans la direction de translation.
  2. La méthode selon la revendication 1) caractérisée en ce que lesdites lames sont espacées après avoir distribué ladite colle.
  3. La méthode selon la revendication 1) ou 2) caractérisée en ce que chaque lame est espacée par le ralentissement des lames en amont le long de la direction de translation.
  4. Encolleuse (1) pour lames de bois indiquée pour la réalisation de la méthode selon la revendication 1) se composant d'un châssis (2) qui comprend:
    au moins une première ligne d'alimentation (3) ayant une première bande transporteuse (4) créant une direction de translation droite (11), où une série de lames (L) sont positionnées l'une côté de l'autre dans une direction transversale;
    au moins une deuxième ligne d'alimentation (5) ayant une deuxième bande transporteuse (6) créant une direction de translation droite (110), où une série de panneaux (P) sont adaptés pour être positionnés l'un après l'autre dans une direction longitudinale, lesdites lignes d'alimentation (3, 5) reposant l'une sur l'autre;
    au moins une unité de distribution de la colle (7) assemblée sur ladite première bande transporteuse (4) indiquée pour étendre une couche uniforme de colle sur lesdites lames (L);
    au moins une station de stratification (8) pour faire adhérer lesdits panneaux (P) aux lames sous-jacentes (L), montées en aval par rapport à ladite unité de distribution de la colle (7) lelong de la direction de translation (11) pour réaliser ledit bloc composite de lames de bois (S);
    au moins une station de pression (9) équipée de moyens de pression indiqués pour presser ledit bloc de lames de bois (S);
    une unité entretoise (10) assemblée en amont par rapport à ladite station de stratification (8) et indiquée pour espacer lesdites lames (L) l'une de l'autre en séquence l'une après l'autre avec une distance essentiellement constante (16) lelong de ladite direction de translation (11);
    caractérisée en ce que ladite unité entretoise (10) comprend des moyens de propulsion (12) pour l'avancement desdites lames (L), suivis par un coulisseau (30) indiqué pour alimenter au moins un couple de courroies de friction (14) étant l'une en face de l'autre et séparées d'une distance (15) fondamentalement égale à la longueur desdites lames (L) et indiqué pour se frotter contre les extrémités des mêmes lames (L) pour les faire avancer lelong de leur direction de translation (11).
  5. Encolleuse (1) selon la revendication 4) caractérisée en ce que ladite unité entretoise (10) est assemblé en aval par rapport audit au moins une unité de distribution de la colle (7).
  6. Encolleuse (1) selon la revendication 4) caractérisée en ce que lesdits moyens de propulsion (12) comprennent au moins un engrenage cylindrique (17) positionné en aval par rapport à ladite première bande transporteuse (4) et avec son axe de rotation (18) étant fondamentalement horizontal et positionné transversalement par rapport à ladite direction de translation (11).
  7. Encolleuse (1) selon la revendication 6) caractérisée en ce que ledit engrenage cylindrique (17) a des dents de poussée (17a, 17b) saillant de la surface définie par ladite première bande transporteuse (4), lesdites dents de poussée (17a, 17b) étant indiquées pour travailler avec des dispositifs profilés de contraste (20) assemblés sur celles-ci pour retenir lesdites lames (L) lelong de ladite direction de translation (11).
  8. Encolleuse (1) selon la revendication 7) caractérisée en ce que lesdits dispositifs profilés de contraste (20) comprennent une plaque (21) avec une construction essentiellement longitudinale avec une extrémité élastiquement tournée vers lesdit châssis (2) au moyen d'un goujon (22) et un dispositif élastique (24) ayant une cavité (23) indiquée pour recevoir lesdites lames (L) pour les retenir lelong de ladite direction de translation (11).
EP00927162A 1999-05-10 2000-05-08 Procede pour coller des baguettes en bois afin de former des blocs de baguettes composites et machine pour mettre en oeuvre ce procede Expired - Lifetime EP1192026B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
ITVI990091 1999-05-10
IT1999VI000091A IT1307431B1 (it) 1999-05-10 1999-05-10 Metodo di incollaggio di listelli di legno per la realizzazione distrutture listellari composite e macchina atta a realizzare tale
PCT/EP2000/004108 WO2000067968A2 (fr) 1999-05-10 2000-05-08 Procede pour coller des baguettes en bois afin de former des blocs de baguettes composites et machine pour mettre en oeuvre ce procede

Publications (2)

Publication Number Publication Date
EP1192026A2 EP1192026A2 (fr) 2002-04-03
EP1192026B1 true EP1192026B1 (fr) 2003-08-06

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ID=11427049

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Application Number Title Priority Date Filing Date
EP00927162A Expired - Lifetime EP1192026B1 (fr) 1999-05-10 2000-05-08 Procede pour coller des baguettes en bois afin de former des blocs de baguettes composites et machine pour mettre en oeuvre ce procede

Country Status (8)

Country Link
EP (1) EP1192026B1 (fr)
AT (1) ATE246578T1 (fr)
AU (1) AU4563000A (fr)
DE (1) DE60004366T2 (fr)
ES (1) ES2204586T3 (fr)
IT (1) IT1307431B1 (fr)
PT (1) PT1192026E (fr)
WO (1) WO2000067968A2 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006034594A1 (fr) * 2004-09-30 2006-04-06 Eric Cable Appareil et procede de collage de surfaces
FR2884168B1 (fr) * 2005-04-08 2007-06-22 Dominique Francois Da Crassous Presse pour la realisation de plancheiages jointes a lames droites ou courbes fixees sur un support
CN114227833A (zh) * 2021-11-26 2022-03-25 深圳市联创电路有限公司 一种多层板层压装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1178522A (fr) * 1957-06-04 1959-05-12 Machine perfectionnée pour enduire des pièces de bois et autres
GB1415909A (en) * 1972-09-07 1975-12-03 Kuroda S Fabrication of frames
JPH0647280B2 (ja) * 1989-04-05 1994-06-22 天龍木材株式会社 複合板材の製造方法
DE19834895A1 (de) * 1998-08-03 2000-02-10 Buerkle Gmbh Robert Verfahren und Vorrichtung zur Herstellung von Parkettdielen
ES2226043T3 (es) * 1998-08-11 2005-03-16 A. Costa Spa Maquina de encolado de piezas laminares o placas.

Also Published As

Publication number Publication date
ITVI990091A1 (it) 2000-11-10
IT1307431B1 (it) 2001-11-06
DE60004366D1 (de) 2003-09-11
DE60004366T2 (de) 2004-06-17
WO2000067968A2 (fr) 2000-11-16
WO2000067968A3 (fr) 2001-02-08
EP1192026A2 (fr) 2002-04-03
AU4563000A (en) 2000-11-21
ATE246578T1 (de) 2003-08-15
ES2204586T3 (es) 2004-05-01
PT1192026E (pt) 2003-12-31

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