EP1447142A1 - Applicateur de fluide et procédé d'application d'un fluide - Google Patents

Applicateur de fluide et procédé d'application d'un fluide Download PDF

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Publication number
EP1447142A1
EP1447142A1 EP03003051A EP03003051A EP1447142A1 EP 1447142 A1 EP1447142 A1 EP 1447142A1 EP 03003051 A EP03003051 A EP 03003051A EP 03003051 A EP03003051 A EP 03003051A EP 1447142 A1 EP1447142 A1 EP 1447142A1
Authority
EP
European Patent Office
Prior art keywords
applicator
duct
fluid
nozzles
inlet
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Withdrawn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
EP03003051A
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
Original Assignee
Akzo Nobel NV
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 filed Critical Akzo Nobel NV
Priority to EP03003051A priority Critical patent/EP1447142A1/fr
Publication of EP1447142A1 publication Critical patent/EP1447142A1/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Withdrawn legal-status Critical Current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
    • B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
    • B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
    • B05C5/027—Coating heads with several outlets, e.g. aligned transversally to the moving direction of a web to be coated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/14—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with multiple outlet openings; with strainers in or outside the outlet opening
    • 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
    • B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
    • B05C17/005—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes
    • B05C17/00503—Details of the outlet element
    • B05C17/00516—Shape or geometry of the outlet orifice or the outlet element

Definitions

  • the present invention relates to an applicator and method for application of a fluid to a substrate.
  • adhesive is typically applied through one or several extruders as the elements are continuously advanced below the extruders to receive an adhesive layer that covers the top surface of the elements.
  • the coated elements are then pressed together to form a consolidated laminate structure.
  • the adhesive is fed from a reservoir and circulated through an applicator having a number of openings arranged in a discharge end, and through which adhesive strands are discharged transversely to the feed direction of the substrates.
  • WO 99/65612 discloses an applicator for spreading a fluid, such as an adhesive, in a thin layer on the surface of a substrate.
  • the applicator comprises a plurality of nozzles arranged in rows on an applicator housing, and through which the fluid is discharged towards a receiving substrate.
  • the fluid is distributed in opposite directions from an inlet that mouths in the centre of an elongate channel, connecting all the nozzles to the inlet via common flow paths.
  • WO 99/67027 discloses an arrangement for separate application of fluid components onto a substrate in a gluing system, such as a system comprising a resin component and a hardener component. Each component is applied from a separate unit, each unit comprising at least one hollow member provided with an inlet and a number of openings through which the component is discharged to be received by the substrate.
  • Production of laminated wood and glue-laminated timber usually involves gluing together two or more wooden member surfaces by means of a multi-component adhesive system, such as adhesive systems based on urea-formaldehyde (UF) resins, melamine-formaldehyde (MF) resins, melamine-urea-formaldehyde (MUF) resins, phenol-formaldehyde (PF) resins, phenol-resorcinol-formaldehyde (PRF) resins, isocyanate resins, polyurethane (PUR) resins, polyvinyl acetate resins, etc.
  • UF urea-formaldehyde
  • MF melamine-formaldehyde
  • MAF melamine-urea-formaldehyde
  • PF phenol-formaldehyde
  • PRF phenol-resorcinol-formaldehyde
  • Such adhesive systems are usually based on at least two components,
  • WO 99/65612 addresses the problems connected with cleaning by providing a disposable spreader insert that protects the spreader housing and nozzles.
  • the object of the present invention is to provide a fluid applicator and method meeting with these needs.
  • a method and an applicator for application of fluids such as adhesive systems, or resin and hardener components of an adhesive system, to a substrate comprising a housing with an inlet end and an outlet end: the inlet end is connectable to a fluid supply, and the outlet end has a multiplicity of nozzles arranged in at least one row for discharge of fluid in parallel fluid strands.
  • the housing defines a continuous duct directing a fluid flow from the inlet to the nozzles: in a first plane, the flow duct has a length in the flow direction and a width across the direction of flow. The width of the duct is increasing from the inlet end substantially to encompass the length of the row of nozzles at the outlet end.
  • the length of the duct preferably is dimensioned such that a flow path length from the inlet to any nozzle in the row of nozzles amounts to at least half the length of the row of nozzles at the outlet end.
  • An advantageous embodiment foresees that all nozzles are equally distanced from the inlet by being arranged on the arc of a circle, the centre of which is located at the fluid inlet.
  • sectional area of the duct is substantially maintained from the inlet end to the outlet end by means of a reducing duct height, the reduction being reciprocally proportional to the increasing width of the duct.
  • the geometry is designed to provide substantially identical fluid flow between the fluid inlet and each discharge opening or nozzle in an applicator, capable of a wide and uniform distribution of fluid to a substrate.
  • flow path length and resistance are considered as decisive parameters for obtaining the uniform discharge of fluid over the entire operational spreading width of the applicator, and hence over the entire width of the substrate.
  • the invention suggests a triangular geometry for an applicator wherein a fluid inlet is arranged in the apex of the triangle and one or more rows of nozzles are arranged on the base line.
  • the height of the triangle i.e. the distance from the fluid inlet transversely to the row of nozzles, will decide the nominal differences in flow path length between the inlet and the nozzles in the row. The greater the height, the smaller the differences.
  • the height at least amounts to half the length of the base line. In other words: the flow path length between the inlet and any nozzle amounts to at least half the operational width of the applicator.
  • the applicator is configured as an isosceles triangle, but other triangular geometries may also be conceivable.
  • the applicator 10 comprises a housing 11, enclosing a duct 12 directing the flow of a fluid form an inlet 13 at an inlet end 14 of the housing, to at least one row of discharge nozzles 15 arranged at an outlet end 16 of the housing 11.
  • the housing 11 has a front face 17 and a back face 18, spaced in superposed relation by means of an interconnecting frame element 19.
  • the inlet 13 is connectable to a fluid supply, and the nozzles 15 are equally spaced on a rectilinear row and designed to discharge the fluid in the form of parallel fluid strands.
  • the applicator 10 is designed to deflect the incoming fluid F transversely through the duct, and then once more transversely through the nozzles.
  • the applicator of figs. 1 and 2 is thus designed for a horizontal orientation in a production line, discharging the fluid F vertically to a substrate (not shown) that is advanced below the applicator.
  • the applicator 10 basically has a triangular outline, the inlet 13 being arranged in the apex and the row/rows of nozzles 15 being arranged on the base line of the triangle.
  • the flow directing duct 12 has a flow path length 1 and a flow path width w.
  • the duct width w increases from the inlet end towards the outlet end, basically to encompass the entire row of nozzles at the outlet end.
  • the diverging geometry of the duct provides a non-obstructed fluid flow from the inlet 13 to each individual nozzle 15.
  • each nozzle 15 is provided a direct communication with the inlet, without its flow path crossing or mixing with the flow path of another nozzle in the row.
  • the duct length 1 preferably is dimensioned such that the distance/flow path length between the inlet 13 and any nozzle 15 in the row of nozzles amounts to at least half the length of the row of nozzles at the outlet end.
  • Modifications to the basic concept realized in the applicator 10 may involve a progressively increasing or flaring duct width w.
  • Another modification may include an inlet that is aligned with the fluid direction through the duct, and mouthing in the very apex of the duct.
  • a further modification may include two or more rows of nozzles, relatively displaced in a zigzag arrangement of the nozzles.
  • the duct 12 has a height h that successively decreases from the inlet end towards the outlet end.
  • the reduction of the height h is reciprocally proportional to the increasing duct width w in order substantially to maintain the same sectional area from the inlet end to the outlet end of the duct 12.
  • the sectional area at the mouth of the inlet may be maintained throughout the duct, all way to the nozzles.
  • the applicator 10 demonstrates a first solution to the problem of obtaining uniform fluid flow conditions over the width of the applicator. A further development of the applicator will now be explained with reference to figs. 3 and 4.
  • the applicator 20 comprises a housing 21, enclosing a duct 22 directing a fluid flow from an inlet 23 at an inlet end 24 of the housing, to at least one row of discharge nozzles 25 arranged at an outlet end 26 of the housing 21.
  • the housing 21 has a front face 27 and a back face 28, spaced in superposed relation by means of an interconnecting frame element 29.
  • the inlet 23 is connectable to a fluid supply, and the nozzles 25 are equally spaced on a rectilinear row and designed to discharge the fluid in the form of parallel fluid strands.
  • the applicator 20 basically has a triangular outline, the inlet 23 being arranged in the apex and the row of nozzles 25 being arranged on the base line of the triangle.
  • the duct width w diverges continuously from the inlet end towards the outlet end, to encompass the length of the row of nozzles 25.
  • the applicator 20 differs from the first applicator 10 in that the base line is curved, and hence the nominal differences in length from the inlet to the nozzles is further reduced.
  • the nozzles 25 are arranged on an arc of a circle.
  • a centre C of the circle is located at the inlet 23, whereby all nozzles are equally spaced on the same radial distance from the inlet.
  • the geometry of applicator 20, wherein the flow paths from the inlet to each nozzle are of equal length promotes an essentially laminar flow of fluid from the inlet 23 to the nozzles 25.
  • the applicator 20 is designed to deflect the incoming fluid F transversely through the duct, from where the fluid is discharged in the flow direction through the duct.
  • the applicator of figs. 3 and 4 is thus designed for a vertical orientation in a production line, discharging the fluid F vertically to a substrate (not shown) that is advanced below the applicator.
  • the curved base line of applicator 20 may be implemented in an applicator for horizontal orientation in a production line, by arranging the nozzles for a deflected discharge flow as shown in fig. 5.
  • the nozzles of applicator 10 may be arranged for a vertical orientation of the applicator, by directing the nozzles to discharge the fluid in the flow direction through the duct 12 as shown in fig. 6.
  • An advantageous feature of the applicators 10 and 20 is that the distances separating the inlet from each nozzle are equal, or essentially equal. As a result, the amount of fluid exiting from each nozzle by unit time will be essentially equal. In the case of spreading an adhesive system, or adhesive system components, to the surface of a substrate, this provides for a uniform distribution of adhesive to the substrate. In consequence, when the substrate is laminated with other substrates, uniform bonding will be secured.
  • the volume of the duct may be comparatively small in order to further avoid the generation of air pockets and stagnation within the duct.
  • the inlet end of the duct may connect closely to the mouth of the fluid inlet, and the duct width is closely dimensioned to encompass the outmost nozzles, thus eliminating any dead volumes in the duct.
  • a small duct volume facilitates cleaning of the applicator, and reduces the wastage of fluid upon cleaning.
  • further measures will be explained in order to reduce the duct volume and wastage of fluid.
  • the suggested measures are considered also to promote a uniform distribution of fluid to the nozzles by extending the flow paths and thus the dwell time of fluid in the duct.
  • the duct is formed as a labyrinth 30 having prismatic formations 31 for separating the flow F, the formations reaching fully over the section height of the duct and connecting the front and back faces of the applicator housing.
  • Other polygonal or rounded sections of the labyrinth structures may by considered, as well as formations of uniform or increasing/decreasing sectional length and width, as seen in the direction of flow.
  • the labyrinth 30 splits the flow into a number of divisional flows and extends the flow path length, thus further decreasing the nominal differences in length between the inlet and the nozzles in the embodiment of applicator 10.
  • the applicator of fig. 8 has a labyrinth 40 formed by a multiplicity of spherical elements 41 loosely received in the duct and substantially filling the duct section from the outlet end to the inlet.
  • the spherical elements 41 may be realized as glass pellets, or pellets formed of other low friction material or coated to provide a non-sticky exterior.
  • the diameter of the spherical elements 41 preferably is chosen to exceed half the height h of the duct.
  • a perforated bottom shield 42 or similar structure, straight or arcuate, may be installed to secure that the fluid has free access to the nozzle entries.
  • the operation of the labyrinth 40 is substantially the same as that of the labyrinth 30, but the labyrinth 40 may further reduce the differences in flow path length from the inlet to the nozzles. Both labyrinths 30,40 result in a substantial reduction of fluid waste in the cleaning operation. In this connection it should be pointed out, that the spherical elements need not be removed in the cleaning operation.
  • the applicator is flushed with pressurized water, optionally in combination with pressurized air, for swift and easy cleaning of the duct and the spherical elements.
  • the adhesive system according to the present invention suitably comprises a resin component and a hardener component.
  • the adhesive system may also comprise hardener, filler, thickener or other component.
  • the resin and hardener components of the adhesive system may be separately applied through individual applicators arranged in succession in the production line. Alternatively, the resin and hardener may be pre-mixed before application through the applicator.
  • the present method is particularly suited for applying adhesive systems, or components of adhesive systems, chosen from the group comprising urea-formaldehyde (UF) resin gluing systems, melamine-formaldehyde (MF) resin gluing systems, melamine-urea-formaldehyde (MUF) resin gluing systems, phenol-formaldehyde (PF) resin gluing systems, phenol-resorcinol-formaldehyde (PRF) resin gluing systems, polyurethane (PUR) resin gluing systems, polyvinyl acetate gluing systems, emulsion polymer isocyanate (EPI) resin gluing systems, and various combinations of two or more of these gluing systems.
  • UF urea-formaldehyde
  • MF melamine-formaldehyde
  • MAF melamine-urea-formaldehyde
  • PF phenol-formaldehyde
  • PRF phenol-re
  • the adhesive system is chosen from melamine-formaldehyde (MF) resin gluing systems, melamine-urea-formaldehyde (MUF) resin gluing systems, phenol-resorcinol-formaldehyde (PRF) resin gluing systems, polyurethane (PUR) resin gluing systems, and emulsion polymer isocyanate (EPI) resin gluing systems.
  • MF melamine-formaldehyde
  • MUF melamine-urea-formaldehyde
  • PRF phenol-resorcinol-formaldehyde
  • PUR polyurethane
  • EPI emulsion polymer isocyanate
  • the present invention provides an improved method for application of the adhesive system, aiming for a uniform distribution of adhesive to the laminate components.
  • the suggested method for applying a fluid adhesive system or fluid components of an adhesive system, such as resin and hardener, illustrated in fig. 9, comprises the modulation of a sectional profile of a fluid flow to be distributed to a substrate.
  • the fluid flow is converted into an extended and narrow sectional profile E of a discharge flow feeding at least one row of distributing nozzles at a discharge end.
  • the converted sectional profile has a width w in a first plane transversely to a flow direction F towards the nozzles, the width successively increasing from a supply end to encompass the operational distribution width W of the nozzles at the discharge end.
  • the width w of the converted fluid section at discharge end is less than twice the length 1 of the shortest distance from the supply end to the discharge end.
  • the converted sectional profile has a height h in a second plane, transversely to said first plane.
  • the height is successively decreasing towards the discharge end of the flow.
  • the decreasing height of the sectional profile is reciprocally proportional to the increasing width thereof towards the discharge end, in order substantially to maintain the same sectional area from the supply end to the discharge end.
  • the sectional area of the concentrated supply flow may be maintained all way to discharge end.
  • the modulation may include one or more deflections of the flow direction before discharge.
  • each nozzle entry is provided a direct communication with the concentrated supply feed, without its flow path crossing or mixing with the flow path of another nozzle in the row of nozzles.
  • the method is equally applicable for separate application of adhesive system components, such as resin and hardener, by distribution through individual applicators, and for application of an adhesive system where the components of the adhesive system have been pre-mixed, through a singular applicator.
  • adhesive system components such as resin and hardener
  • multiple applicators 10,20 may be arranged in an assembly and laterally and/or axially displaced relative to the feed direction of the substrate, thus extending a total operational spreading width W (1+n) of the system.
  • Fig. 10 illustrates a horizontal assembly of three applicators 10, and in fig. 11, a vertical assembly of three applicators 20 is illustrated.
  • a uniform feed to each applicator in the assembly may be controlled by flow meters and regulators arranged to control the volume flow rate from a supply of adhesive system or adhesive system components.

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  • Application Of Or Painting With Fluid Materials (AREA)
  • Coating Apparatus (AREA)
EP03003051A 2003-02-12 2003-02-12 Applicateur de fluide et procédé d'application d'un fluide Withdrawn EP1447142A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP03003051A EP1447142A1 (fr) 2003-02-12 2003-02-12 Applicateur de fluide et procédé d'application d'un fluide

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP03003051A EP1447142A1 (fr) 2003-02-12 2003-02-12 Applicateur de fluide et procédé d'application d'un fluide

Publications (1)

Publication Number Publication Date
EP1447142A1 true EP1447142A1 (fr) 2004-08-18

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EP03003051A Withdrawn EP1447142A1 (fr) 2003-02-12 2003-02-12 Applicateur de fluide et procédé d'application d'un fluide

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2410909A (en) * 2004-02-10 2005-08-17 Stephen David Richards Adhesive applicator
WO2008058911A1 (fr) * 2006-11-15 2008-05-22 Basf Se Procédé et dispositifs d'application séparée d'un système de colle liquide à plusieurs constituants
WO2011012221A1 (fr) * 2009-07-25 2011-02-03 Bona Gmbh Deutschland Buse d’application pour colles visqueuses
EP2444163A1 (fr) 2010-10-23 2012-04-25 Andreas Otto Buse
DE102013219628B4 (de) * 2012-09-28 2016-08-11 Via Optronics Gmbh Applikations-Element, Vorrichtung und Verfahren zum Aufbringen einer Schicht eines viskosen Materials auf ein Substrat sowie eine Vorform

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1950796A (en) * 1933-04-03 1934-03-13 Frank M Hilgerink Cleaning nozzle
DE2711121A1 (de) * 1977-03-15 1978-09-21 Bayerische Motoren Werke Ag Auftragsduese fuer mittel- bis hochviskose medien, insbesondere kleber
DE4140335A1 (de) * 1991-12-06 1993-06-09 Alfred 8200 Rosenheim De Siess Vorrichtung zum auftragen von salben auf gazen, insbesondere zur wundbehandlung
US5776251A (en) * 1996-07-22 1998-07-07 Hirano Tecseed Co., Ltd. Duplex type coating apparatus and coating system
WO1999065612A1 (fr) 1998-06-18 1999-12-23 Casco A/S Repandeuse permettant d'etaler un fluide du type adhesif
WO1999067027A1 (fr) 1998-06-22 1999-12-29 Akzo Nobel N.V. Dispositif et procede servant a appliquer un systeme de collage
WO2000069571A1 (fr) * 1999-05-17 2000-11-23 A.W. Faber-Castell Unternehmensverwaltung Gmbh & Co. Dispositif pour l'application de structures en relief en matiere plastique sur des surfaces
US20020014201A1 (en) * 1998-12-08 2002-02-07 Michael Holmstrom Device and method for spray extrusion

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1950796A (en) * 1933-04-03 1934-03-13 Frank M Hilgerink Cleaning nozzle
DE2711121A1 (de) * 1977-03-15 1978-09-21 Bayerische Motoren Werke Ag Auftragsduese fuer mittel- bis hochviskose medien, insbesondere kleber
DE4140335A1 (de) * 1991-12-06 1993-06-09 Alfred 8200 Rosenheim De Siess Vorrichtung zum auftragen von salben auf gazen, insbesondere zur wundbehandlung
US5776251A (en) * 1996-07-22 1998-07-07 Hirano Tecseed Co., Ltd. Duplex type coating apparatus and coating system
WO1999065612A1 (fr) 1998-06-18 1999-12-23 Casco A/S Repandeuse permettant d'etaler un fluide du type adhesif
US6340122B1 (en) * 1998-06-18 2002-01-22 Casco A/S Spreader for spreading a fluid, such as an adhesive
WO1999067027A1 (fr) 1998-06-22 1999-12-29 Akzo Nobel N.V. Dispositif et procede servant a appliquer un systeme de collage
US20020014201A1 (en) * 1998-12-08 2002-02-07 Michael Holmstrom Device and method for spray extrusion
WO2000069571A1 (fr) * 1999-05-17 2000-11-23 A.W. Faber-Castell Unternehmensverwaltung Gmbh & Co. Dispositif pour l'application de structures en relief en matiere plastique sur des surfaces

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2410909A (en) * 2004-02-10 2005-08-17 Stephen David Richards Adhesive applicator
WO2008058911A1 (fr) * 2006-11-15 2008-05-22 Basf Se Procédé et dispositifs d'application séparée d'un système de colle liquide à plusieurs constituants
WO2011012221A1 (fr) * 2009-07-25 2011-02-03 Bona Gmbh Deutschland Buse d’application pour colles visqueuses
US8430588B2 (en) 2009-07-25 2013-04-30 Bona Gmbh Deutschland Application nozzle for viscous adhesives
EP2444163A1 (fr) 2010-10-23 2012-04-25 Andreas Otto Buse
DE102013219628B4 (de) * 2012-09-28 2016-08-11 Via Optronics Gmbh Applikations-Element, Vorrichtung und Verfahren zum Aufbringen einer Schicht eines viskosen Materials auf ein Substrat sowie eine Vorform

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