EP0916410A1 - Procédé et appareil d'encollage - Google Patents

Procédé et appareil d'encollage Download PDF

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Publication number
EP0916410A1
EP0916410A1 EP98203525A EP98203525A EP0916410A1 EP 0916410 A1 EP0916410 A1 EP 0916410A1 EP 98203525 A EP98203525 A EP 98203525A EP 98203525 A EP98203525 A EP 98203525A EP 0916410 A1 EP0916410 A1 EP 0916410A1
Authority
EP
European Patent Office
Prior art keywords
pieces
roller
adhesive
hardener
applying
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Withdrawn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
EP98203525A
Other languages
German (de)
English (en)
Inventor
Lennart Vesterlund
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.)
Akzo Nobel NV
Casco Products AB
Original Assignee
Akzo Nobel NV
Casco Products AB
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 Akzo Nobel NV, Casco Products AB filed Critical Akzo Nobel NV
Priority to EP98203525A priority Critical patent/EP0916410A1/fr
Publication of EP0916410A1 publication Critical patent/EP0916410A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
    • B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
    • B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
    • B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
    • B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
    • B05C1/0826—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line the work being a web or sheets
    • B05C1/083—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line the work being a web or sheets being passed between the coating roller and one or more backing rollers
    • 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 present invention relates to a method of continuous, even application of adhesive and/or hardener to materials, such as wood, plastic or metal, having different dimensions, such as for example wooden lamellae in the production of furniture.
  • the method of the invention comprises continuous even spreading of adhesive and/or hardener on the surfaces of the pieces which shall be joined by gluing.
  • the invention also relates to a device for carrying out the method.
  • adhesive is intended to embrace one-component adhesive, one or both of the components of a two-component adhesive, i e, adhesive component and/or hardener component) on the surfaces of at least one side of pieces to be glued together by means of a rotating roller is a method of common practise.
  • the adhesive can be applied to the upper surface or the lower surface (one side adhesive application), or both surfaces (double side adhesive application), of the materials to be glued together.
  • Roller spreaders for one side and double side adhesive application are conventionally known in the art.
  • a roller spreader for one side adhesive application can be comprised of a feeding roller, an applying roller, and a doctor roller, such as described in, for example, EP-A-0 550 918, and also shown in Fig 1 herein.
  • the doctor roller provides means for close regulation of the glue spread.
  • the surface of the applying roller exhibits grooves.
  • the applying roller is provided with groovings adapted for 150 g/m 2 , it is possible to adjust the glue spread by ⁇ 10 g/m 2 by means of the doctor roller.
  • roller spreaders having an adhesive tray instead of a doctor roller. In either case, the distance between the applying roller and the doctor roller, and the adhesive tray, respectively, is regulated for adjusting the glue spread. In order to obtain the proper glue spread, it is essential that the correct grooving of the applying roller is chosen.
  • Variations in thickness of the material or between different pieces to which adhesive is to be applied are typically about ⁇ 0.5 mm.
  • the applying roller when no feeder roller is used, merely the gravitational force of the pieces themselves can be utilised, however insufficient, by having the applying roller positioned such that the plane of the uppermost surface of said roller is located slightly above the plane of the conveying/feeding device, such that, when passing through the roller spreader, the pieces will rest against the applying roller. However, in this case, the pieces might tend to tip and/or tilt.
  • a number of lamellae of different height-dimensions are assembled to an aggregate to be glued together.
  • An example of such production is the production of chair seats, having for example the length and width of 600 and 500 mm, respectively. These seats may comprise 5 to 15 lamellae having varying width but with the same length of 600 mm. The width of the seat is 500 mm but can be made up of 5 up to 15 lamellae.
  • These furniture components are glued together, for example, in a hot press, cold press or high frequency line.
  • the continuous application of adhesive takes place on the lower surfaces of the lamellae utilising the one side adhesive application.
  • the lamellae are placed on the feeder device of the adhesive spreader, with the surfaces onto which adhesive is to be applied facing down, and with their length aligned in the feeding direction, and are conveyed over the applying roller. Since the lamellae are of different height and thickness dimensions, they will also have different weights, and consequently, for some pieces, the weight thereof will not be sufficient to bring said pieces into continuous, intimate contact with the adhesive on the application roller, thereby jeopardising the continuous even application of adhesive, leaving areas of the lower surfaces to which adhesive has not been applied, or only insufficiently applied.
  • the conventional roller spreader of the above type having a feeder roller, allows for continuous applying of adhesive to materials, having different dimensions only within a narrow interval, such as ⁇ 0.5 mm.
  • a narrow interval such as ⁇ 0.5 mm.
  • the present invention accordingly provides a method, and a device for carrying out the method, by which the above-mentioned problems are overcome.
  • the method according to the present invention provides a continuous even application of adhesive and/or hardener to pieces of material of different height-dimensions. It comprises a continuous feeding of said pieces through a roller spreader and a continuous applying of adhesive and/or hardener, to at least one of the surfaces of said pieces.
  • the pieces of material are fed between at least one pressure exerting roller comprising a cylinder provided with flexible bristles, and one or more applying rollers, which are provided with the adhesive and/or hardener, to be applied to the surfaces, whereby said adhesive and/or hardener is/are applied evenly to the surface(s) of said material.
  • the flexible bristles are bending upon contact with the surface of all the pieces of the material of different height-dimensions, resulting in an even application of adhesive and/or hardener to said pieces.
  • the cylinder provided with flexible bristles suitably has a width exceeding the width of the pieces of the fed material, providing sideways stability to said pieces.
  • Suitable adhesives for use in the present invention can be selected from urea-formaldehyde adhesives, melamine-urea-formaldehyde adhesives, phenol-resorcinol adhesives, polyvinyl acetate based adhesives, emulsion polymerisation-isocyanate adhesives, and polyurethane adhesives.
  • the device according to the claimed invention used for carrying out a simultaneous, uniform, continuous, application of adhesive and/or hardener to pieces of material, having different height-dimensions in relation to each other, comprises means for feeding said pieces of material, one or more applying rollers, and means for supplying adhesive and/or hardener to each of said applying roller(s). It comprises at least one flexible, pressure exerting roller comprising a cylinder provided with flexible bristles, wherein the means for feeding are arranged to feed said pieces of material between the pressure exerting roller(s) and the applying roller(s).
  • the pressure exerting roller and the applying roller can be arranged at such a distance from each other, so that the flexible bristles are bending upon contact with the surface of all the pieces of the material of different height-dimensions. Furthermore, the claimed device comprises means for independently regulating the speeds of the applying roller(s) (240) and the pressure exerting roller(s).
  • FIGS 2 and 3 show one embodiment of the claimed invention and are not meant to limit the scope of the claimed invention.
  • the method of the present invention comprises simultaneous application of adhesive to the pieces of material 200 of different dimensions, for instance comprising wooden lamellae 205, by means of the roller spreader including one or more flexible, pressure exerting roller(s), according to the invention, which lamellae thereafter can be pressed together, for example, to form a glued product, such as block wood or laminated timber, or to form components of furniture.
  • the method is carried out by supplying the material to be glued 200, such as for example wooden lamellae, to a roller spreader according to the invention (shown together with conveying means 210, 215), applying adhesive 290 to the lower surfaces 207 of the materials by means of the application roller 240, and continuously removing the pieces exiting the roller spreader by means of conveying belt 215.
  • the materials to be glued 200 are fed to the roller spreader by means of conveying belt 210 to the roller spreader.
  • the roller spreader shown in Fig. 2 according to the invention comprises an application roller 240, a doctor roller 250, to which adhesive 290 is supplied, and a flexible, pressure exerting roller 260.
  • the pieces of material could be turned 90° around the length axis of each lamella, and an additional lamella 209 shown in Fig. 3, having no adhesive applied thereto is also provided, which is to be brought into contact with the unpaired remaining exposed adhesive coated surface, said pieces and the additional lamella forming components of furniture, which are subsequently pressed together in hot press, cold press, or frequency press lines, for example.
  • the length of the lamellae can, for example, range from 50 cm to 4 m.
  • the flexible, pressure exerting roller of the invention 260 comprises a cylinder 270 provided with bristles 280.
  • the doctor roller 250 which can be seen in Fig. 2, could also be substituted with an adhesive tray, optionally along with an adhesive transfer roller.
  • a doctor roller 250, an adhesive tray, or an adhesive tray together with an adhesive transfer roller independently can be used with each of the one or more applying rollers for supplying of adhesive and/or hardener.
  • the means of supplying adhesive to the application roller is not restricted in any way as long as the amount of adhesive feed can be suitably regulated.
  • an even, continuous spreading of adhesive on the surfaces to be glued is obtained by means of the bristles 280 exerting a pressure against the application roller 240 on each of the pieces to be glued, and at the same time also providing a support essentially parallel to the sides of the pieces as can be seen in Fig. 3. Furthermore, tilting and tipping is avoided since the upper surface of the applying roller 240, and of the conveyer belt 210, 215 preferably can be provided in essentially the same plane.
  • the speed of the applying roller 240 and the flexible, pressure exerting roller 260, respectively, can each be independently regulated in order to obtain the proper feeding of the material through the roller spreader.
  • the speed of the material through the roller spreader can for example be about 20 to 50 m/min, typically about 30 m/min.
  • the distance between the applying roller and the flexible, pressure exerting roller can also be regulated by adjusting the positions of the rollers, preferably that of the pressure exerting roller(s), to obtain a suitable distance between the rollers, so as to achieve a required minimum pressure on the pieces of material, thereby assuring continuous even contact of the lower surfaces of the pieces with the adhesive on the applying roller.
  • the bristles should be in contact with the smallest piece to such an extent that said bristles are bent somewhat against the upper surface of said piece, and as a suitable example, the bristles can overlap about half the height of said piece upon passage of the piece through the roller spreader.
  • the flexible, pressure exerting roller is commercially available and comprises a brush roll which can accommodate dimensional differences in height of the material of up to about 100 mm, suitably up to about 50 mm. Said brush roll should also be as soft and compliant as to not undesirably affect the speed of the lamellae in the feeding direction.
  • the width of said brush roll should preferably be extending the width of the pieces of the fed material, providing side stability to said pieces (see Fig. 3).
  • a suitable diameter of such a brush roll can for instance be about 300 mm.
  • the width of the brush roller is about the same as the application roller.
  • the flexible material of the brush roll of the invention may comprise bristles 280, such as shown in Fig. 2 and 3, for example made of polyamide, or other plastic material such as polypropylene, or spring steel, glass fibres or natural fibrous material, provided in a direction extending essentially radially from the centre of the rotational axis thereof.
  • the cross-section of said bristles can be round, square or rectangular, or another suitable geometric shape.
  • the diameter of the bristles can range from about 0.1 mm to about 2.0 mm, and the length thereof from about 100 mm to about 300 mm.
  • the specific type of bristles used and the material thereof is not critical as long as the required elasticity is obtained.
  • the material of the cylinder 270 can be for example a metallic or plastic material, such as polyethylene.
  • a suitable brush roll can be comprised of, for example, polyamide bristles of 1.5 mm diameter, provided in bundles attached to the cylinder 270, having axially, along the length of said cylinder, the distribution of 7.5 mm of bristles with a distance of 10 mm between two neighbouring bundles.
  • the spacing between two adjacent bundles can be about 2 - 10 mm in any direction.
  • additional means for preventing tilting in combination with the present invention such as a pair of brush rollers arranged in a "V"-shape with the tip of the "V" facing the exit side of the roller spreader, or for example a pair of spring loaded arms resting against the outermost sides of the pieces being glued.
  • roller spreader according to the invention while described herein with reference to embodiments thereof incorporating only one application roller and one flexible, pressure exerting roller, also can incorporate two or more of the above-mentioned rollers, the numbers of which can be chosen independently from each other.
  • adhesives encountered in the wood processing industry which can be used in combination with the present invention are, for example; urea-formaldehyde adhesives, melamine-urea-formaldehyde adhesives, phenol-resorcinol adhesives, polyvinyl acetate based adhesives, emulsion polymerisation-isocyanate adhesives, and polyurethane adhesives.
  • the roller spreader of the present invention can, for instance, also be used for separate application of hardeners (as included in the definition of "adhesive" herinbefore) of two-component adhesives to pieces, onto which pieces a corresponding adhesive component subsequently is to be applied.
  • the hardener may, for instance, be a hardener suited for curing an aminoresin based or formaldehyde based adhesive.
  • the hardener may also be in a mixture with the adhesive and be applied to the pieces as such.
  • the surface material of the applying roller provided with groovings can be any suitable conventional material, such as steel, rubber or plastic, which is sufficiently inert in relation to the particular adhesive or hardener to be applied.
  • the material of the pieces to which application of adhesive or hardener according to the invention is intended can also, in addition to wooden material, be for example any suitable plastic or metallic material.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Coating Apparatus (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
EP98203525A 1997-11-14 1998-10-19 Procédé et appareil d'encollage Withdrawn EP0916410A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP98203525A EP0916410A1 (fr) 1997-11-14 1998-10-19 Procédé et appareil d'encollage

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP97850161 1997-11-14
EP97850161 1997-11-14
EP98203525A EP0916410A1 (fr) 1997-11-14 1998-10-19 Procédé et appareil d'encollage

Publications (1)

Publication Number Publication Date
EP0916410A1 true EP0916410A1 (fr) 1999-05-19

Family

ID=26148204

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98203525A Withdrawn EP0916410A1 (fr) 1997-11-14 1998-10-19 Procédé et appareil d'encollage

Country Status (1)

Country Link
EP (1) EP0916410A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1002586A3 (fr) * 1998-11-11 2001-11-28 Ostermann & Scheiwe GmbH & Co Dispositif d'application de revêtements liquides ou pâteux à des pièces
EP3385084A1 (fr) * 2017-04-05 2018-10-10 Faber- Castell AG Rouleau d'application destiné à appliquer de la colle, en particulier destiné à appliquer de la colle sur des plaquettes en bois lors de la fabrication de crayons en bois
CN109483670A (zh) * 2018-11-30 2019-03-19 湖南省杨林木业有限公司 一种木材加工设备

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2874675A (en) * 1954-05-05 1959-02-24 United Shoe Machinery Corp Strip coating apparatus
DE1292543B (de) * 1961-07-31 1969-04-10 Ralphs Unified Ltd Vorrichtung zum Auftragen von Klebstoff auf ein Werkstueck unterschiedlicher Dicke
EP0550918A1 (fr) 1991-10-03 1993-07-14 Casco Nobel Aktiebolag (reg. number 556004-5311) Procédé d'encollage
US5401540A (en) * 1992-05-18 1995-03-28 Masonite Corporation Printer support brush and method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2874675A (en) * 1954-05-05 1959-02-24 United Shoe Machinery Corp Strip coating apparatus
DE1292543B (de) * 1961-07-31 1969-04-10 Ralphs Unified Ltd Vorrichtung zum Auftragen von Klebstoff auf ein Werkstueck unterschiedlicher Dicke
EP0550918A1 (fr) 1991-10-03 1993-07-14 Casco Nobel Aktiebolag (reg. number 556004-5311) Procédé d'encollage
US5401540A (en) * 1992-05-18 1995-03-28 Masonite Corporation Printer support brush and method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1002586A3 (fr) * 1998-11-11 2001-11-28 Ostermann & Scheiwe GmbH & Co Dispositif d'application de revêtements liquides ou pâteux à des pièces
EP3385084A1 (fr) * 2017-04-05 2018-10-10 Faber- Castell AG Rouleau d'application destiné à appliquer de la colle, en particulier destiné à appliquer de la colle sur des plaquettes en bois lors de la fabrication de crayons en bois
CN109483670A (zh) * 2018-11-30 2019-03-19 湖南省杨林木业有限公司 一种木材加工设备
CN109483670B (zh) * 2018-11-30 2021-05-04 湖南省杨林木业有限公司 一种木材加工设备

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