EP1656211A1 - Dispositif a buse et a filtre et systeme pour appliquer sur un substrat un fluide comprenant des particules solides - Google Patents

Dispositif a buse et a filtre et systeme pour appliquer sur un substrat un fluide comprenant des particules solides

Info

Publication number
EP1656211A1
EP1656211A1 EP04764020A EP04764020A EP1656211A1 EP 1656211 A1 EP1656211 A1 EP 1656211A1 EP 04764020 A EP04764020 A EP 04764020A EP 04764020 A EP04764020 A EP 04764020A EP 1656211 A1 EP1656211 A1 EP 1656211A1
Authority
EP
European Patent Office
Prior art keywords
channel
fluid
nozzle arrangement
flow
filter
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Withdrawn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
EP04764020A
Other languages
German (de)
English (en)
Inventor
Hubert Kufner
Uwe Weddehage
Thomas Burmester
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.)
Nordson Corp
Original Assignee
Nordson Corp
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 Nordson Corp filed Critical Nordson Corp
Publication of EP1656211A1 publication Critical patent/EP1656211A1/fr
Withdrawn legal-status Critical Current

Links

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
    • B05C5/0254—Coating heads with slot-shaped outlet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
    • B05B15/40—Filters located upstream of the spraying outlets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • B05D5/06—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain multicolour or other optical effects
    • B05D5/061—Special surface effect
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/50—Multilayers
    • B05D7/52—Two layers
    • B05D7/53—Base coat plus clear coat type
    • B05D7/532—Base coat plus clear coat type the two layers being cured or baked together, i.e. wet on wet
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/18—Paper- or board-based structures for surface covering
    • D21H27/22—Structures being applied on the surface by special manufacturing processes, e.g. in presses
    • D21H27/26—Structures being applied on the surface by special manufacturing processes, e.g. in presses characterised by the overlay sheet or the top layers of the structures
    • D21H27/28—Structures being applied on the surface by special manufacturing processes, e.g. in presses characterised by the overlay sheet or the top layers of the structures treated to obtain specific resistance properties, e.g. against wear or weather
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/06—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation
    • B05D3/061—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation using U.V.
    • B05D3/065—After-treatment
    • B05D3/067—Curing or cross-linking the coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/06—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation
    • B05D3/068—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation using ionising radiations (gamma, X, electrons)

Definitions

  • the invention relates to a nozzle arrangement for applying fluid with solid particles to a substrate that is movable relative to the nozzle arrangement, with a mouthpiece receptacle and a mouthpiece attached to it, wherein a fluid channel is formed in the nozzle arrangement, which has a connecting channel that can be connected to a fluid supply, and a downstream distribution channel and has an outlet channel which connects further downstream and opens into a fluid outlet slot.
  • the invention further relates to a system for applying fluid with solid particles to a substrate with such a nozzle arrangement and with a transport device, set up to generate a relative movement between the nozzle arrangement and the substrate.
  • the invention relates to a filter arrangement for use in such a system.
  • Such arrangements and systems are used to apply different, flowable materials such as (hot melt) adhesives, lacquers, lotions or coating materials to different products continuously or intermittently, in a caterpillar shape, in line, point or area.
  • a system contains or is connected to a fluid source, for example a (heated) adhesive container, from which the fluid is conveyed, if necessary by means of a pump assigned to the system, through the filter arrangement and a connecting hose connected downstream, also assigned to the system and possibly heated ,
  • the connecting hose connects this so-called (melting and) conveying device to a downstream so-called application head, which has the fluid supply, a valve arrangement connected into the fluid supply and the nozzle arrangement.
  • the fluid flow can be interrupted or released by the valve arrangement.
  • the valve Flows with the valve open the fluid through the filter arrangement, the connecting hose, the fluid supply and the fluid channel located in the nozzle arrangement and emerges from the fluid outlet slot with pressure.
  • the fluid is applied to the substrate, which is moved with the aid of the transport device relative to the nozzle arrangement - and more precisely to the fluid outlet slot.
  • the nozzle assembly is in contact with the substrate (contact type) during the application of the fluid, while in other devices a distance is maintained between the nozzle assembly and the substrate.
  • Coating powders are becoming increasingly important in various branches of industry.
  • So z. B. thermally activated powders, crosslinkable powders or super-absorbent powders are frequently used in the field of hygiene articles, such as e.g. Diapers, napkins, hospital linen or other sanitary articles, in the clothing industry, for home textiles, such as carpets, wallpapers, upholstery fabrics, etc., as so-called "filled lotion” or “peeling” in the cosmetics industry, in the production of coated filters and for many other products used.
  • such powders can be applied in the form of mixtures with a liquid carrier.
  • the object of the present invention is accordingly to provide a system, a nozzle arrangement and a filter arrangement which solve the problems mentioned when applying fluids with solid or powdery particles.
  • This object is achieved by a nozzle arrangement of the type mentioned at the outset, in which the connecting duct and the distributor duct are at least partially formed in the mouthpiece receptacle and in which all changes in direction within the fluid duct are less than 90 °.
  • This invention is based on the knowledge that the powdery, solid particles preferably accumulate at the locations of the nozzle arrangement at which turbulence occurs due to a strong change in speed.
  • a separation of the solid particles from the fluid and their accumulation is avoided in the device according to the invention by ensuring an essentially straight flow without strong changes in direction and thus in speed.
  • all deflection angles are preferably in a range below 45 ° and particularly preferably below 25 °. The laminar flow largely ensured by this measure prevents separation of the solid particles and the fluid.
  • the distribution channel is preferably designed as a pocket which has a bottom which is flush with the connecting channel or inclined by less than 90 ° with respect to its central axis and has at least one peripheral surface, the bottom and the at least one peripheral surface merging into one another in the form of radii.
  • the intermediate angle between the bottom and the central axis of the connecting channel is preferably less than 45 ° and in some cases less than 25 °.
  • the distributor channel preferably tapers continuously in the flow direction, viewed in the section plane perpendicular to the fluid outlet slot, and widens continuously viewed perpendicularly thereto, the cross section of the distributor channel being essentially constant.
  • This measure ensures that the fluid in the desired direction - namely in the direction of the fluid outlet slot - transversely to Flow direction distributed, while the flow rate does not decrease due to the uniform cross-section.
  • this has the advantage that, in contrast to an abrupt or discontinuous expansion, on the one hand there are no dead cavities in which the solid particles can be deposited. On the other hand, there are also no points of reduced flow velocity in which the solid constituents are also preferably deposited.
  • the base and the at least one peripheral surface of the distributor channel are polished. This reduces the surface roughness and also reduces the tendency to build up.
  • the mouthpiece has a contact surface for guiding the substrate, which is delimited on one side by the fluid outlet slot, an angle between the central axis of the outlet channel and the contact surface in the region of the fluid outlet slot, viewed in the plane perpendicular to the fluid outlet slot, being acute.
  • Component receives in the direction of the (relative) movement of the substrate, the speed change between the exit and the
  • Deposition on the substrate surface (application) of the fluid is less than in known nozzle arrangements, the outlet channel of which runs at an angle of 90 ° to the substrate surface. In other words, it is
  • the angle between the central axis of the outlet channel and the contact surface in the region of the fluid outlet slot is not 90 ° as in the known nozzle arrangements or mouthpieces, but is reduced by the amount of the pivoting angle of the nozzle arrangement , so that the contact surface adjoining the fluid outlet slot lies tangentially on the substrate in the region of the fluid outlet slot for the purpose of the contact application.
  • a further improvement of the nozzle arrangement according to the invention with regard to the problems described is achieved in that the nozzle arrangement has a pressurized gas channel which can be connected to a pressurized gas source and opens into a gas outlet opening and which is arranged on the side of the fluid channel facing away from the contact surface in such a way that a gas stream emerging from the gas outlet opening The fluid outlet slot flows in such a way that any gas that may accumulate on an outer surface of the nozzle arrangement facing away from the contact surface is captured by the gas stream.
  • the last-mentioned measure also counteracts the adhesion of the fluid and thus ensures a uniform flow of the fluid until it is deposited on the substrate surface. This more effectively prevents contamination or (partial) blockage of the fluid outlet slot and an uneven application pattern.
  • the above-mentioned object is further achieved by a system of the type mentioned at the outset with one of the nozzle arrangements mentioned above, in which an angle between the central axis of the outlet channel of the nozzle arrangement and the transport direction of the transport device on the discharge side of the fluid outlet slot, viewed in the section plane perpendicular to the fluid outlet slot, is obtuse is. If the intermediate angle between the central axis of the outlet channel and the substrate on the discharge side of the fluid outlet slot, ie on the side of the outlet channel facing away from the contact surface, is increased, the above-described success is achieved: the direction of flow of the fluid in the outlet channel then receives a component in the direction of the relative movement between the nozzle assembly and the substrate. This has the effect that the change in speed between the leakage and the application of the fluid is reduced.
  • a filter arrangement for use in such a system, with a fluid supply line, a fluid discharge line, a flow channel connecting the fluid supply line and the fluid discharge line and a sheet-like filter element arranged in the flow channel, the cross-sectional areas of the fluid supply line, the fluid discharge line , the flow channel and the filter element are substantially the same size.
  • Filter arrangements are known from the prior art which have cylindrical filter elements with an axial inlet.
  • the fluid flows there through a narrowed cross section into the interior of the filter and, after being deflected in the radial direction, exits via the cylindrical peripheral surface.
  • a comparatively large filter area can be achieved with a relatively compact design, but this also always means an expansion of the cross-section through which it flows. Consequently, both inside and outside of the filter the flow velocity is reduced and the solid particles can be deposited in the flow channel through the filter or through a filter housing surrounding the filter, preferably in dead cavities and angles for the reasons mentioned above.
  • a plurality of sheet-like filter elements with a mesh size decreasing in the flow direction are preferably arranged in the flow channel in the filter arrangement.
  • Such an arrangement is known from sieving technology, in which the serial arrangement of different sieves serves to break down granular bulk goods into different grain classes.
  • the arrangement of the present invention counteracts the problem that the filter area is deliberately reduced due to the avoided widening of the cross-sectional area compared to the known cylindrical filters.
  • the resulting reduced service life of the filter is at least partially compensated according to the invention in that the mesh size of the filter elements arranged one behind the other in the flow direction decreases, specifically in the form that, depending on the filtrate, an approximately equal amount of filter cake is deposited on each of the filters.
  • the flow channel advantageously runs essentially linearly and the surface of the filter element is perpendicular to its flow direction.
  • Figure 1 is a sectional view of an embodiment of the system according to the invention with a nozzle arrangement and a transport device in the plane perpendicular to the outlet gap.
  • FIG. 1A shows a sectional illustration of the nozzle arrangement according to the embodiment from FIG. 1; 2 shows a front view of a first exemplary embodiment of the nozzle arrangement according to the invention;
  • FIG. 3 shows a top view of the nozzle arrangement from FIG. 2;
  • FIG. 4 shows a front view of a second exemplary embodiment of the nozzle arrangement according to the invention.
  • FIG. 5 shows a partially sectioned side view of an embodiment of the filter arrangement according to the invention.
  • FIG. 6 shows a sectional side view of the filter arrangement according to FIG. 5 installed in a melting and conveying device of the system according to the invention.
  • the system 100 shown in FIG. 1 has a nozzle arrangement 110 according to the invention and a transport device 150.
  • the nozzle arrangement 110 is composed of a mouthpiece receptacle 112, a mouthpiece 114 and a nozzle part 116.
  • a fluid 118 for example a (hot melt) adhesive, lacquer, a lotion or another coating agent in liquid form mixed with solid particles, becomes the
  • Nozzle arrangement 110 is supplied by means of a fluid supply, which is not described in detail. This fluid supply communicates with one another
  • Nozzle arrangement designed fluid channel which comprises a plurality of sections: a connecting channel 120, which is connected to the fluid supply, a downstream connecting channel 122 and an outlet channel 124, which is connected to this downstream and opens into a fluid outlet slot 126.
  • connection channel 120 is formed by an oblique through hole in the mouthpiece receptacle 112, see also FIG. 1A.
  • the through hole itself shows no change in direction.
  • the distributor channel 122 is formed entirely in the mouthpiece receptacle 112 in the form of a pocket.
  • the distribution channel can also be formed, for example, half each in the mouthpiece receptacle and in the mouthpiece.
  • the bag is in the The area of the mouth of the connecting channel 120 is deeper and runs in a wedge shape towards the outlet channel 124, bounded on one side by a bottom 128 running obliquely to the interface between the mouthpiece receptacle 112 and the mouthpiece 114.
  • the transition between the connecting channel 120 and the distribution channel 122 is almost flush and the bottom in turn has no kink and therefore no deflection of the fluid flow in the plane shown in FIGS. 1 and 1A.
  • the intermediate angle between the central axis of the connecting duct 120 and the bottom 128 of the distributor duct 122 is only 10 ° in the exemplary embodiment shown.
  • the wedge shape of the distributor channel 122 reduces its cross section in the view shown in FIG. 1.
  • FIGS. 2 and 4 which show two different exemplary embodiments of a nozzle arrangement in the view perpendicular to this, the distributor channel - limited by a circumferential surface 164, depending on the desired application width - widens in the direction of the illustration or Cutting plane perpendicular to the fluid outlet slot 126 more or less.
  • the cross section of the distribution channel 122 can be kept substantially constant, which ensures a more uniform flow rate of the fluid in the fluid channel.
  • Both the taper shown in FIG. 1 and the widening of the distribution channel, which can be seen in FIGS. 2 and 4 take place continuously, so that dead cavities which occur during abrupt or discontinuous widenings and in which particles can accumulate are avoided.
  • the flow velocity of the fluid can be optimized by coordinating the cross section of the connecting channel 120 with that of the distributor channel 122.
  • the outlet channel 124 is formed at the interface between the mouthpiece receptacle 112 and the mouthpiece 114. It is formed by a franking extending downward from a lower section of the distribution channel 122. This can, for example, be inserted between the mouthpiece receptacle 112 and the mouthpiece 114 Spacer plate may be formed or be integrated in the mouthpiece receptacle 112 or in the mouthpiece 114 by a corresponding milling. The franking has an overlap with the distribution channel 122 formed in the mouthpiece receptacle 112, through which the fluid 118 flows.
  • the outlet channel 124 formed in this way is laterally limited in the plane perpendicular to the sectional plane shown by two edges 260, 262 and 460, 462 of the franking and thereby defines the width of the fluid outlet slot 126, see FIGS. 2 and 4.
  • the outlet channel runs in a completely straight line, and the transition from the distributor channel 122 to the outlet channel also shows only a slight change in direction.
  • the intermediate angle between the bottom 128 of the distribution channel 122 and the outlet channel 124 is only 10 °.
  • the connection channel 120, the distribution channel 122 and the outlet channel 124 accordingly have no deflections on the one hand, and on the other hand are arranged relative to one another in such a way that the fluid flow as a whole does not undergo a deflection that is greater than 25 °.
  • FIG. 1 also shows a substrate 132 which is brought up to the nozzle arrangement 110 in the transport direction 130 and which lies against the nozzle arrangement 110. Accordingly, it is a contact-type order system.
  • a contact surface 134 is formed on the mouthpiece 114. In the plane of the illustration, this has a radius, the tangent of which at the point of the fluid outlet slot 126 encloses a right angle with the central axis of the outlet channel 124.
  • the system according to the invention has an inclination of the outlet channel 124 of the nozzle arrangement 110 with respect to the vertical direction on the transport path of the substrate 132.
  • the angle of inclination is 10 °.
  • this results in an obtuse angle between the central axis of the outlet channel 124 and the substrate surface 132 on the side of the fluid outlet slot opposite the contact surface 134 126 (discharge side).
  • the fluid exit slot 126 is lifted off the substrate surface 132.
  • the nozzle part 116 has the
  • Nozzle arrangement 110 furthermore has a pressurized gas channel 142 which can be connected to a pressurized gas source, not shown, and which opens into a gas outlet opening 140 shaped as a slot. This is oriented such that a gas stream, preferably an air stream, flowing out of the gas outlet opening 140 flows towards the fluid outlet slot 126 such that no fluid passes through on the side of the fluid outlet slot facing away from the contact surface 134
  • Adhesion can adhere. Fluid that emerges from the fluid outlet slot is in fact captured by the gas stream and by one on this side of the
  • Fluid outlet slot arranged outer surface of the nozzle arrangement in the direction of the substrate surface 132 permanently guided away. There is therefore no build-up and uncontrolled falling off of
  • the exemplary embodiment of the system according to the invention from FIG. 1 has two rollers 152, 154, over the circumferential surfaces of which the substrate arranged on a conveyor belt is fed.
  • the design of the transport device 150 is not important in the system according to the invention.
  • a sliding table or any other transport device can also be provided.
  • the contact surface 134 can also be configured such that the radius in the region of the fluid outlet slot 126 lies tangentially on the substrate surface 132. This is the angle between the Contact surface 134 in this area and the center axis of the outlet channel pointed. In this embodiment too, the deflection of the fluid flow remains less than 90 ° during the transition to the substrate. This measure ensures a nozzle arrangement of the contact type in which the contact of the outlet channel or the outlet slot with the substrate is ensured, which can be advantageous, depending on the viscosity of the fluid.
  • FIGS. 2 and 3 show the nozzle arrangement 210 and 310 consisting of the mouthpiece receptacle 312 and the mouthpiece 314 again in a front view (FIG. 2) and a top view (FIG. 3).
  • FIGS. 2 and 3 show the nozzle arrangement 210 and 310 consisting of the mouthpiece receptacle 312 and the mouthpiece 314 again in a front view (FIG. 2) and a top view (FIG. 3).
  • the course of the connecting channel 220, the distributor channel 222 and the outlet channel 224 is shown in dashed lines.
  • a double line indicates that a circumferential surface 264 above and laterally delimiting the distribution channel 222 with a radius 266 merges into the bottom 128 (not recognizable in the representations of FIGS. 2 and 3). This avoids angular transitions that represent dead cavities in which the particles can be deposited.
  • the outlet channel 224 is laterally delimited by the above-mentioned edges 260, 262 or 460, 462 of the franking, which are incorporated into the spacer plate, the mouthpiece or the mouthpiece receptacle. This defines the width of the outlet channel 224 and the fluid outlet slot 126.
  • the embodiment of the nozzle arrangement 410 shown in FIG. 4 is in principle identical to the embodiment shown in FIG. 2. The only difference is a smaller application width, which is ensured by a narrower distribution channel 422 and by a narrower outlet channel 424, which is delimited by both edges 460, 462.
  • the exemplary embodiment shown in FIG. 4 also has a peripheral surface 464 of the distributor channel 422, which merges into the bottom of the distributor channel in the form of a radius 466.
  • the nozzle arrangement according to the invention is not restricted to these exemplary embodiments.
  • Mouthpiece or the mouthpiece holder also a comb-like structure be provided. Instead of an outlet channel, these form a plurality of outlet channels arranged next to one another, which open into correspondingly arranged fluid outlet slots.
  • the housing 572 has a radially sealed inlet connector 574 as a fluid feed line with an inlet bore 575 aligned coaxially with the cylinder axis 573.
  • a radially sealed outlet connector 576 as a fluid drain with a connection thread 577 as connecting element.
  • the outlet connector 576 and the thread 577 have a core bore 578, which is also aligned coaxially to the cylinder axis 573 of the housing 572.
  • the direction of flow within the filter arrangement 570 is completely linear. Furthermore, there are no significant narrowing of the cross section, so that turbulence and changes in speed of the fluid flowing through the filter arrangement 570 are largely avoided. This suppresses the accumulation of solid particles.
  • a total of three flat filter elements or disks 580, 581, 582 are arranged in the housing 572.
  • the surfaces of the filter disks are perpendicular to the cylinder axis 573 and thus to the direction of flow of the fluid. This measure also ensures that the flow is not deflected.
  • the filter discs 580 preferably have an annular support frame and a filter fabric attached or clamped therein as a filter medium. In the arrangement of several such filter disks 580, 581, 582 shown in FIG. 5, it proves to be advantageous to reduce the mesh size of the fabric in the flow direction from one filter disk to the next.
  • the grading is preferably carried out taking into account the particle size of the particles in such a way that those to be filtered out Impurities or particles with too large a grain size are separated on each of the filter disks to approximately the same extent. As a result, the service life of the filter arrangement can be increased overall.
  • the filter disks 580, 581, 582 are arranged at a uniform spacing in the housing 572 by means of spacer sleeves 584, 585, 586.
  • the spacer sleeves and the filter disks can be removed from the housing 572 after the inlet connection 574 has been removed for the purpose of cleaning or replacement.
  • spacer sleeves of different lengths it is possible to arrange one, two or more filter disks with the same or different distances in the housing 572.
  • the filter arrangement 670 from FIG. 5 is used in an exemplary system according to the invention for applying fluid with solid particles. More specifically, the arrangement shown is a melting and conveying device 690 assigned to the system. In the melting and conveying device 690, melt adhesive introduced in the form of granules or blocks is melted into a tank section 691 and by means of a pump 692 driven by a motor (eg gear pump) in the direction of the filter arrangement 670. Between a suction line 693 connecting the tank 691 and the pump 692 and a pressure line connecting the pump 692 and the filter arrangement 670
  • valve 694 a valve 695 and a bypass line 696 are connected.
  • the maximum pressure of the fluid at which the bypass line 696 is opened can be set.
  • the pressure line 694 is aligned parallel to the filter arrangement 670, so that no deflection of the fluid flow is generated even in the transition from the pressure line to the filter arrangement.
  • the pressure line 694 at least has in the area of the adjoining fluid supply line 574 of the filter arrangement 670 has the same cross-section as the inlet bore 575.
  • a connecting hose 698 is connected to the fluid drain 576 of the filter arrangement 670 by means of the thread 577. This connects the filter arrangement 670 with the nozzle arrangement according to the invention. Additional connecting elements are usually connected between the connecting hose 698 and the nozzle arrangement. These include valves for controlling the application process and a fluid supply which communicates with both the connecting hose 698 and the connecting channel of the nozzle arrangement. In the case of this system, the connecting hose 698 can be heated to apply a hot melt adhesive, so that it maintains the optimal processing temperature and thus flow properties on its transport path from the melting and conveying device 690 to the nozzle arrangement.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Coating Apparatus (AREA)
  • Nozzles (AREA)

Abstract

La présente invention concerne un système conçu pour appliquer un fluide (118) comprenant des particules solides. Ce système comprend un dispositif à buse (110) et un système de transport (150). L'angle formé entre la direction de transport (130) du système de transport (130) et un canal de sortie (124) du dispositif à buse (110, 210, 310, 410) est un angle obtus. La présente invention concerne également un dispositif à buse (110) et un dispositif à filtre (570) conçus pour un tel système. Le dispositif à buse (110) présente un logement pour bec à buse (112) et un bec à buse (114) fixé sur ce logement. Un canal à fluide formé dans le dispositif à buse (110) présente un canal de liaison (120), un canal de distribution adjacent (122) et un canal de sortie adjacent (124). Le canal de liaison (120) et le canal de distribution (122) sont moulés dans le logement pour bec à buse (112) et tous les changements de direction à l'intérieur du canal à fluide sont inférieurs à 90°. Le dispositif à filtre (570) présente une conduite d'admission de fluide (574), une conduite d'évacuation de fluide (576), un canal d'écoulement (587) et un élément filtrant plat (580, 581, 582) dont les surfaces de section transversale sont sensiblement de même taille.
EP04764020A 2003-08-14 2004-08-12 Dispositif a buse et a filtre et systeme pour appliquer sur un substrat un fluide comprenant des particules solides Withdrawn EP1656211A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10337768A DE10337768A1 (de) 2003-08-14 2003-08-14 Düsen- und Filteranordnung sowie System zum Auftragen von Fluid mit festen Partikeln auf ein Substrat
PCT/EP2004/009016 WO2005016554A1 (fr) 2003-08-14 2004-08-12 Dispositif a buse et a filtre et systeme pour appliquer sur un substrat un fluide comprenant des particules solides

Publications (1)

Publication Number Publication Date
EP1656211A1 true EP1656211A1 (fr) 2006-05-17

Family

ID=34177654

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04764020A Withdrawn EP1656211A1 (fr) 2003-08-14 2004-08-12 Dispositif a buse et a filtre et systeme pour appliquer sur un substrat un fluide comprenant des particules solides

Country Status (6)

Country Link
US (1) US20070204793A1 (fr)
EP (1) EP1656211A1 (fr)
JP (1) JP2007502201A (fr)
CN (1) CN1835809A (fr)
DE (1) DE10337768A1 (fr)
WO (1) WO2005016554A1 (fr)

Families Citing this family (12)

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Publication number Priority date Publication date Assignee Title
CA2621551C (fr) * 2005-09-13 2012-10-23 Sunstar Giken Kabushiki Kaisha Applicateur de materiau de revetement hautement visqueux
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WO2005016554A1 (fr) 2005-02-24
JP2007502201A (ja) 2007-02-08
CN1835809A (zh) 2006-09-20
DE10337768A1 (de) 2005-03-17
US20070204793A1 (en) 2007-09-06

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