EP0367985B1 - Adaptateur d'une tuyère pour un pistolet à adhésif - Google Patents

Adaptateur d'une tuyère pour un pistolet à adhésif Download PDF

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Publication number
EP0367985B1
EP0367985B1 EP19890118357 EP89118357A EP0367985B1 EP 0367985 B1 EP0367985 B1 EP 0367985B1 EP 19890118357 EP19890118357 EP 19890118357 EP 89118357 A EP89118357 A EP 89118357A EP 0367985 B1 EP0367985 B1 EP 0367985B1
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EP
European Patent Office
Prior art keywords
plate
nozzle
adhesive
air
throughbore
Prior art date
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Expired - Lifetime
Application number
EP19890118357
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German (de)
English (en)
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EP0367985A2 (fr
EP0367985A3 (en
Inventor
Charles H. Scholl
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Nordson Corp
Original Assignee
Nordson Corp
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Publication of EP0367985A3 publication Critical patent/EP0367985A3/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/08—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point
    • B05B7/0807—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point to form intersecting jets
    • B05B7/0861—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point to form intersecting jets with one single jet constituted by a liquid or a mixture containing a liquid and several gas jets
    • 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
    • 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
    • B05C5/0225—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 characterised by flow controlling means, e.g. valves, located proximate the outlet

Definitions

  • This invention relates to a nozzle attachement for use in an apparatus for dispensing adhesive according to the preamble of claim 1 and an apparatus for spraying hot melt adhesive according to the preamble of claim 4.
  • Hot melt thermoplastic adhesives have been widely used in industry for adhering many types of products, and are particularly useful in applications where quick setting time is advantageous.
  • One application for hot melt adhesive which has been of considerable interest in recent years is the bonding of non-woven fibrous material to a polyurethane substrate in articles such as disposable diapers, incontinence pads and similar articles.
  • One aspect of forming an appropriate bond between the non-woven layer and polyurethane substrate of a disposable diaper, for example, is to avoid loss of adhesive in the valleys or gaps formed in the irregular surface of the chopped fibrous or fluff-type material which forms the non-woven layer. If the adhesive is discharged onto the non-woven layer in droplet form, for example, a portion of the droplets can fall between the gaps in the surface of the fibrous, non-woven material. As a result, additional quantities of adhesive are required to obtain the desired bond strength between the polyurethane substrate and non-woven material.
  • EP-A1-0 333 902 an apparatus is disclosed in which elongated adhesive fibers are formed in a spiral spray pattern by means of a rotary nozzle. Such design is relatively expensive to manufacture and difficult to operate.
  • the nozzle attachment of that invention is adapted to mount to the nozzle of a standard adhesive spray gun which is formed with an adhesive discharge opening connected to an adhesive passageway in the gun body and an air discharge opening connected to an air passageway in the gun body.
  • the nozzle attachment is a one-piece annular plate formed with a boss extending outwardly from a first surface of the plate and a nozzle tip extending outwardly from a second surface of the plate.
  • a throughbore is formed between the boss and nozzle tip which communicates with the adhesive discharge opening in the nozzle of the gun body when the plate is mounted to the nozzle. Heated hot melt adhesive is transmitted through the adhesive passageway in the gun body, out its adhesive discharge opening and then into the throughbore in the plate. The adhesive is ejected as a bead through the nozzle tip toward a substrate.
  • the annular plate is formed with a V-shaped notch or groove which extends from its first surface having the boss toward the second surface formed with the nozzle tip.
  • the V-shaped groove is provided to assist in drilling air jet bores in the plate through which jets of pressurized air are directed at an angle of about 30° and tangent to the adhesive bead ejected from the nozzle tip.
  • the annular V-shaped groove is formed with two sidewalls, one of which is disposed substantially perpendicularly to the longitudinal axis of each of the air jet bores.
  • This construction permits the drill bit to contact the plate at the surface of one of the sidewalls in the V-shaped groove which is substantially perpendicular to the axis of movement of the drill bit, i.e., at an angle of abut 30° to the first and second surfaces of the plate.
  • sliding of the drill bit relative to the plate is minimized during the drilling or boring operation which helps locate the air jets bores at the desired angle in the plate.
  • nozzle attachment disclosed in AU-B-15045/88 solves many of the problems of prior art devices designed to spray adhesive fibers, some deficiencies have been discovered in certain applications. It has been found that the formation of a groove in the relatively thin nozzle attachment or plate can result in deflection of the nozzle attachment during operation. This deflection can form a leakage path at the interface between the nozzle attachment and nozzle of the spray gun. In some instances, it has been found that hot melt adhesive entering the nozzle attachment has flowed along this leakage path and been deposited in the V-shaped groove where the air flows into the air jet bores. This can clog the air jet bores and restrict the flow of air necessary to attenuate or stretch the adhesive bead to form adhesive fibers.
  • nozzle attachment of AU-B-15045/88 Another potential problem with the nozzle attachment of AU-B-15045/88 is that the air jet bores are drilled in the plate or nozzle attachment from the inner side or surface with contacts the nozzle toward the outer side of surface formed with the nozzle tip. Because the air jet bores are so small in diameter, i.e. 0.38 to 0.51 mm (0.015 to 0.020 inches), it is possible for the drill bit to drift or move off line in the course of passing through the nozzle attachment from its inner side to the outer side. As a result, the discharge outlet of the air jet bores at the outer side of the nozzle attachment might be slightly out of position and this can affect the efficiency of the nozzle attachment in forming adhesive fibers because the air jets may not impact the adhesive bead precisely tangentially thereto.
  • the nozzle tip of the nozzle attachment disclosed in AU-B-15045/88 protrudes from the outer surface thereof when mounted to the nozzle of the gun body, and extends outwardly from a mounting nut which secures the nozzle attachment to the nozzle of the spray gun. A cavity or space is thus formed between the nozzle tip and such mounting nut.
  • cut-off drool i.e., adhesive remaining after the gun is shut off
  • This cut-off drool might collect and partially block the discharge outlet of the air jet bores formed in the nozzle attachment, thus affecting the performance or the nozzle attachment in forming adhesive fibers.
  • the protruding nozzle tip is exposed and can be damaged if it contacts the target substrate or other object during operation of the spray gun.
  • a nozzle attachment for a hot melt adhesive spray device having the features of claims 1 and 4, respectively
  • This includes a gun body and a nozzle having an adhesive passageway and an air passageway.
  • the nozzle attachment is a one-piece annular plate which is mounted by a cap or nut to the nozzle of the gun body.
  • the nozzle attachment or plate is formed with a throughbore adapted to connect to the adhesive passageway in the nozzle, and a plurality of spaced air jet bores are formed in the plate which communicate with the air passageway in the nozzle.
  • An adhesive bead is ejected from the throughbore in the plate which is impacted by air jets from the spaced air jet bores.
  • the air jets are directed tangentially to the bead to both stretch the bead forming hot melt adhesive fibers, and to impart a spiral motion to the adhesive fibers so that they are deposited in a controlled spray pattern upon a substrate.
  • the one-piece annular plate is formed with a boss extending outwardly from a first, inner surface of the plate, and a nozzle tip extending inwardly from a second, outer surface of the plate toward its inner surface.
  • a throughbore is formed between the boss and nozzle tip which communicates with the adhesive passageway in the nozzle when the plate is mounted thereto. Heated hot melt adhesive is transmitted through the nozzle and then into the throughbore in the plate from which it is ejected through a discharge outlet of the nozzle tip toward a substrate.
  • the annular plate of this invention is relatively thick from its inner surface to its outer surface in order to resist deflection with respect to the nozzle during operation of the spray gun.
  • the inner surface of the plate is flat or planar except for the boss which extends outwardly therefrom. This inner surface forms an effective metal-to-metal seal with the mating surface of the nozzle of the spray gun when the plate is mounted thereto. As a result, adhesive transmitted from the nozzle into the throughbore of the plate is prevented from leaking at the interface therebetween.
  • the annular plate forming the nozzle attachment of this invention is formed with an annular, V-shaped notch or groove which extends inwardly from the outer surface of the plate toward its inner surface.
  • This V-shaped groove is provided to assist in the drilling operation of the air jet bores through which jets of pressurized air are directed from the air passageway in the nozzle, through the plate and then into contact with the adhesive bead ejected from the discharge outlet of the nozzle tip.
  • each of the spaced air jet bores is drilled at an angle of approximately 30° with respect to the longitudinal axis of the throughbore in the plate from which the adhesive bead is ejected.
  • the V-shaped notch or groove at the outer surface of the nozzle attachment forms two sidewalls.
  • One of the sidewalls is oriented substantially perpendicularly to the longitudinal axis of each of the air jet bores.
  • the other sidewall forms the outer surface of the nozzle tip such that the discharge outlet of the nozzle tip is substantially coplanar with the outer surface of the plate.
  • the sidewall of the V-shaped groove oriented perpendicularly to the longitudinal axis of the air jet bores permits the drill bit to contact the plate at a surface which is substantially perpendicular to the axis of movement of the drill bit even though the drill bit is moved at a 30° angle with respect to the outer surface of the plate.
  • the air jet bores formed in the nozzle attachment of this invention are drilled by movement of a drill bit from the outer surface of the nozzle attachment where the V-shaped groove is formed, toward the inner surface of the nozzle attachment which contacts the nozzle.
  • the spaced air jet bores are also formed in the plate at an angle relative to the outer periphery of the throughbore and the adhesive bead ejected therefrom.
  • the longitudinal axis of each air jet bore is oriented at an angle of approximately 10° with respect to a vertical plane which passes through the longitudinal axis of the throughbore in the plate and the center of such air jet bore at the V-shaped groove in the plate.
  • annular recess is formed in the nozzle attachment or plate which extends inwardly at the peripheral edge of the plate from its outer surface toward the inner surface.
  • This annular recess forms a seat which receives the mounting nut or cap which mounts the nozzle attachment to the nozzle of the spray gun.
  • the outer surface of the nozzle attachment and the discharge outlet of the nozzle tip are coplanar with the mounting cap or nut when the nozzle attachment is mounted to the spray gun nozzle.
  • This construction has two advantages. First, there is no space or cavity formed between the mounting nut and nozzle tip in which cut-off drool or strands of adhesive could collect to block the air jet bores. This had been a problem in the aforementioned patent application Serial No. 07/041,712 wherein a gap was formed between the nozzle tip and mounting nut. Secondly, the mounting nut, the outer surface of the nozzle attachment and the discharge outlet of the nozzle tip are all coplanar. This prevents the nozzle tip from contacting the substrate or another object during separation of the spray gun where it could be damaged.
  • the nozzle attachment or plate of this invention provides an economical means to convert a standard spray gun into one in which hot melt adhesive may be discharged in elongated strands or fibers for applications such as bonding the non-woven and polyurethane layers of disposable diapers or other hygienic articles.
  • the construction of the nozzle attachment or plate prevents leakage of adhesive at its interface with the nozzle, facilitates the accurate drilling of air jet bores so that the adhesive bead discharged from the spray device is consistently formed into elongated fibers and resists clogging from build-up of cut-off drool.
  • the nozzle attachment or plate is easily removed from the spray gun and replaced with another nozzle attachment of different size to accommodate different applications and/or different spray guns.
  • an adhesive spray device 10 comprising a gun body 12 having a nozzle 14 connected at one end, and an adhesive manifold 16 and air manifold 17 mounted to the gun body 12.
  • the air manifold 17 is mounted to the adhesive manifold 16 by two or more screws 19, each of which extend through a spacer 21 extending between the manifolds 16, 17.
  • the nozzle 14 supports a nozzle attachment 18 from which a bead of heated hot melt adhesive is discharged and formed into a thin, elongated bead or fiber which is rotated in a compact spiral spray pattern onto a substrate, as discussed in detail below.
  • the structure of the gun body 12 and manifolds 16, 17 are substantially identical to the Model H200 spray gun manufactured and sold by the assignee of this invention, Nordson Corporation of Amherst, Ohio. These elements form no part of the invention per se and are thus discussed only briefly herein.
  • the upper portion of gun body 12 is formed with an air cavity 20 which receives the upper end of a plunger 22 mounted to a seal 24.
  • the seal 24 is slidable within the air cavity 20 and provides an airtight seal along its walls.
  • a collar 26 is mounted to the upper end of gun body 12, such as by bolts 28, which is formed with a throughbore defining an inner, threaded wall 30.
  • the collar 26 receives a plug 32 having external threads which mate with the threaded wall 30 of the collar 26.
  • the plug 32 is hollow and a spring 34 is mounted in its interior which extends between the top end of the plunger 22 and the head 36 of plug 32 having a screw slot 38.
  • a lock nut 40 is threaded onto the plug 32 into engagement with the top edge of the collar 26.
  • the plug 32 is rotatable with respect to the collar 26 to vary the force applied by the spring 34 against the top edge of plunger 22.
  • the lock nut 40 is first rotated to disengage the collar 26 after which a screwdriver is inserted into the screw slot 38 in the head 36 of plug 32 and rotated to move the plug 32, and in turn increase or decrease the compression force of spring 34 within the collar 26.
  • the plunger 22 is sealed at the base of the air cavity 20 by a seal 42 which permits axial movement of the plunger 22 therealong.
  • the plunger 22 extends downwardly through the gun body 12 from the air cavity 20 through a stepped bore 44 which leads into an adhesive cavity 46 having a seal 48 at its upper end and a plunger mount 50 at its lower end.
  • a spring 51 carried around the plunger 22 is disposed within the adhesive cavity 46 and extends between the seal 48 and plunger mount 50 to hold the seal 48 in place. This seal 48 and seal 42 aid in guiding the axial movement of plunger 22 within the gun body 12.
  • the upper end of the nozzle 14 extends into the adhesive cavity 46 and is sealed thereto by an O-ring 52.
  • the nozzle 14 is fixed to the gun body 12 by screws 54.
  • the plunger 22 extends downwardly from the adhesive cavity 46 and plunger mount 50 into an adhesive passageway 56 formed in the nozzle 14 which terminates at an adhesive discharge opening 57.
  • the adhesive passageway 56 is formed with a conical-shaped seat 58 which mates with the terminal end 59 of the plunger 22. As discussed below, movement of the plunger 22 relative to the seat 58 controls the flow of heated hot melt adhesive ejected from adhesive passageway 56 through its adhesive discharge opening 57.
  • the nozzle 14 is also formed with a reduced diameter portion having external threads 60 which mate with internal threads formed in a cap 62. As described below, the cap 62 mounts the nozzle attachment 18 to the base of nozzle 14 in communication with the discharge opening 57 of adhesive passageway 56.
  • the gun body 12 is mounted to the adhesive manifold 16 by mounting bolts 64.
  • the adhesive manifold 16 is supported on a bar 66 by a mounting block 68 connected to the adhesive manifold 16 with screws 70.
  • the mounting block 68 is formed with a slot 72 forming two half sections 73, 75 which receive the bar 66 therebetween.
  • a bolt 74 spans the half sections 73, 75 of the mounting block formed by the slot 72 and tightens them down against the bar 66 to secure the mounting block 68 thereto.
  • the adhesive manifold 16 is formed with a junction box 76 which receives an electric cable 78 to supply power to a heater 80 and an resistance temperature detector 82.
  • the heater 80 maintains the hot melt adhesive in a molten state when it is introduced into the adhesive manifold 16 through an adhesive inlet line 84 from a source of hot melt adhesive (not shown).
  • the adhesive inlet line 84 communicates through a connector line 86 formed in the gun body 12 with the adhesive cavity 46.
  • An O-ring 85 is provided between the gun body 12 and adhesive manifold 16 at the junction of the adhesive inlet line 84 and connector line 86 to form a seal therebetween.
  • Operating air for the plunger 22 is supplied through an inlet line 88 formed in the adhesive manifold 16 which is joined by a connector line 90 to the air cavity 20.
  • the gun body 12 and manifold are sealed thereat by an O-ring 89.
  • the air manifold 17 is formed with an air inlet line 92 connected to an air delivery passageway 94 formed in the nozzle 14 which terminates in an annular chamber 95 at the base of the nozzle 14.
  • O-ring seal 96 forms a fluid-tight seal between the nozzle 14 and air manifold 17 at the intersection of air inlet line 92 and air delivery passageway 94.
  • the nozzle attachment 18 is an annular plate having one side formed with a first or inner surface 102 and an opposite side formed with a second or outer surface 104 spaced from the inner surface 102.
  • inner refers to a direction toward the nozzle 14
  • outer refers to a direction away from the nozzle 14 with the nozzle attachment 18 mounted to the nozzle 14 as shown in Fig. 1.
  • a boss 106 extends outwardly from the inner surface 102, and a nozzle tip 108 extends inwardly from the outer surface 104 in alignment with the boss 106.
  • a throughbore 110 is drilled in the nozzle attachment 18 between the boss 106 and the nozzle tip 108 forming a discharge outlet 109 in the nozzle tip 108 which is coplanar with the outer surface 104 of nozzle attachment 18.
  • the throughbore 110 has a diameter in the range of about 0.25 to 1.02 mm (0.010 to 0.040 inches), and preferably in the range of about 0.44 to 0.47 mm (0.0175 to 0.0185 inches).
  • An annular, V-shaped groove 112 is formed in the nozzle attachment 18 which extends inwardly from its outer surface 104 toward the inner surface 102.
  • the annular groove 112 defines a pair of sidewalls 114, 116 which are substantially perpendicular to one another and intersect.
  • the sidewall 116 is formed at approximately a 30° angle with respect to the planar outer surface 104 of the nozzle attachment 18, and the sidewall 114 forms the outer surface of the nozzle tip 108.
  • six air jet bores 118 are formed in the nozzle attachment between the annular groove 112 and the inner surface 102, preferably at an angle of approximately 30° with respect to the longitudinal axis of the throughbore 110.
  • the diameter of the air jet bores 118 is in the range of about 0.25 to 1.02 mm (0.010 to 0.040 inches), and preferably in the range of about 0.43 to 0.48 mm (0.017 to 0.019 inches).
  • the annular groove 112 facilitates accurate drilling of the air jet bores 118 so that they are formed at the desired angle relative to throughbore 110 and are precisely located at the desired position along the sidewall 116 of groove 112.
  • a drill bit (not shown) can enter the annular groove 112 in the nozzle attachment 18 at a 30° angle relative to its outer surface 104, but contact the sidewall 116 formed by the annular groove 112 at a 90° angle.
  • the drilling operation is performed with minimal slippage between the drill bit and nozzle attachment 18.
  • the outlet 119 of the air jet bores 118 allows the outlet 119 of the air jet bores 118 to be precisely positioned at the sidewall 116 and oriented at the appropriate angles relative to throughbore 110.
  • the inlet 121 of the air jet bores 118 may be slightly out of position but would nevertheless intersect the annular chamber 95 formed in nozzle 14.
  • each of the air jet bores 118 is angled approximately 10° with respect to a vertical plane passing through the longitudinal axis of the throughbore 110 and the center of each such bore 118 at the annular groove 112.
  • the longitudinal axis 122 of air jet bore 118a is angled approximately 10° relative to a vertical plane passing through the longitudinal axis 124 of throughbore 110 and the center point 126 of bore 118a at the annular groove 112 in nozzle attachment 18.
  • the jet of pressurized air 128 ejected from air jet bore 118a is directed substantially tangent to the outer periphery of the throughbore 110 and the adhesive bead 130 ejected therefrom, as described below.
  • the cap 62 is formed with an annular seat 132 which mates with an annular recess 134 formed in the peripheral edge of nozzle attachment 18 which extends inwardly from its outer surface 104.
  • the cap 62 is threaded onto the lowermost end of the nozzle 14 so that the boss 106 on the inner surface 102 of nozzle attachment 18 extends within a seat 136 formed in the base of nozzle 14 at the adhesive discharge opening 57 of adhesive passageway 56.
  • the inlet of each of the air jet bores 118 communicates with the annular air chamber 95 formed in the base of the nozzle 14 at the end of the air delivery passageway 94.
  • the operation of the spray device 10 of this invention is as follows. Heated hot melt adhesive is introduced into the adhesive cavity 46 of the gun body 12 through the adhesive inlet line 84. Adhesive flows from the adhesive cavity 46 into the nozzle 14 through the adhesive passageway 56. With the terminal end 59 of the plunger 22 in engagement with the seat 58 formed at the end of the adhesive passageway 56, as illustrated in Fig. 1, the adhesive is not permitted to flow through the adhesive discharge opening 57 of the adhesive passageway 56 to the throughbore 110. In order to retract the plunger 22 and permit the flow of adhesive into the discharge opening 57, operating air is introduced through the operating air line 88 into the air cavity 20 in the gun body 12.
  • This pressurized air acts against the seal 42 connected to the plunger 22 which forces the plunger 22 upwardly so that its terminal end 59 disengages the seat 58 at the lower end of the adhesive passageway 56.
  • the plunger 22 is returned to its closed position by discontinuing the flow of air to the air cavity 20 allowing the return spring 34 to move the plunger 22 back into a seated position.
  • the flow of hot melt adhesive through the adhesive discharge opening 57 of adhesive passageway 56 is transmitted into the throughbore 110 of nozzle attachment 18 from which it is discharged through the discharge outlet 109 of nozzle tip 108 to form the adhesive bead 130.
  • the adhesive bead 130 is formed and ejected from the nozzle attachment 18, pressurized air is directed through the air inlet line 92, air delivery passageway 94 and air chamber 95 to the air jet bores 118 formed in the nozzle attachment 18.
  • the air jet bores 118 are angled relative to the longitudinal axis of the throughbore 110 so that the jets of air 128 flowing therethrough impact the adhesive bead 130 substantially tangent to its outer periphery at a point spaced below the nozzle tip 108.
  • the air ejected from the air jet bores 118 performs two functions. First, the jets of air 128 attenuate or stretch the adhesive bead 130 forming elongated strands or fibers of hot melt adhesive for deposit onto a substrate.
  • the air jet bores 118 are oriented to direct jets of air 128 tangent to the outer periphery of the adhesive bead 130, the adhesive bead 130 and adhesive fibers formed therefrom are rotated in a compact spiral path toward a substrate. As a result, a controlled pattern of adhesive having a desired width is obtained on the substrate.

Claims (8)

  1. Adaptateur de tuyère destiné à être utilisé dans un appareil de distribution d'adhésif qui comporte un pistolet (12) possédant une tuyère (14) formée avec un passage d'adhésif (56) permettant de transmettre un adhésif et un passage de conduite d'air (94) permettant de transmettre de l'air pressurisé, ledit adaptateur de tuyère comprenant :
    une plaque (18) formée avec une première surface (102) sur un côté de ladite plaque, et une seconde surface (104) sur un côté opposé de ladite plaque ;
    ladite plaque (18) comportant un alésage traversant (110) s'étendant entre ladite première surface (102) et un orifice de déchargement (109) d'une extrémité de tuyère (108), ladite plaque (18) étant adaptée pour être montée sur ladite tuyère (14) dudit pistolet (12) de façon que ledit alésage traversant (110) communique avec ledit passage d'adhésif (56) dans ladite tuyère (14) pour recevoir l'adhésif, l'adhésif étant transmis à travers ledit alésage traversant (110) et étant éjecté dudit orifice de déchargement (109) de l'extrémité de tuyère (108) pour former un filet d'adhésif (130) ;
    ladite plaque (18) étant adaptée pour être montée sur ladite tuyère (14) de façon que chacun des alésages de jet d'air (118) d'une pluralité réalisés dans ladite plaque communique avec ledit passage de conduite d'air (94) de la tuyère (14), afin de permettre la transmission de l'air à travers celui-ci, et
    lesdits alésages de jet d'air (118) étant réalisés avec un angle par rapport audit alésage traversant (110) de ladite plaque (18) afin de diriger l'air pressurisé s'écoulant à travers ceux-ci substantiellement selon la tangente à la périphérie externe dudit filet d'adhésif éjecté de l'orifice de déchargement d'adhésif (109) de l'extrémité de tuyère (108), de façon à réaliser ledit filet d'adhésif (130) sous la forme d'une fibre allongée d'adhésif et imprimer un mouvement de torsion à ladite fibre allongée d'adhésif permettant un dépôt selon un modèle de diffusion en spirale sur un substrat, ledit adaptateur étant caractérisé en ce que ladite extrémité de tuyère (108) est formée dans ladite plaque qui s'étend vers l'intérieur à partir de ladite seconde surface en direction de ladite première surface, ladite extrémité de tuyère (108) possédant une surface externe et un orifice de déchargement (109) placé substantiellement dans le même plan que ladite seconde surface (104) de ladite plaque (18) ;
    ladite plaque (18) est formée avec une rainure annulaire (112) s'étendant vers l'intérieur à partir de ladite seconde surface (104) en direction de ladite première surface (102), ladite rainure annulaire (112) possédant une première portion (114) qui forme ladite surface externe de l'extrémité de tuyère (108) et une seconde portion (116) qui est inclinée par rapport audit alésage traversant (110) de ladite plaque (18) ;
    lesdits alésages de jet d'air (118) s'étendant à partir de ladite rainure annulaire (112) à travers ladite plaque (18) ; et
    lesdits alésages de jet d'air (118) possédant chacun un axe longitudinal s'étendant substantiellement perpendiculairement à ladite seconde portion (116) de la rainure annulaire (112).
  2. Adaptateur de tuyère selon la revendication 1 dans lequel lesdits alésages de jet d'air (118) de ladite plaque annulaire (18) forment un angle d'environ 30° par rapport à l'axe longitudinal dudit alésage traversant (110) de ladite plaque (18).
  3. Adaptateur de tuyère selon la revendication 1 dans lequel l'axe longitudinal de chacun desdits alésages de jet d'air (118) forme un angle d'environ 10° par rapport à un plan vertical passant par l'axe longitudinal dudit alésage traversant (110), l'air pressurisé (128) éjecté desdits alésages de jet d'air (118) étant ainsi dirigé substantiellement selon la tangente à la périphérie externe dudit filet d'adhésif (130) éjecté de l'orifice de déchargement (109) de l'extrémité de tuyère (108).
  4. Appareil de distribution d'adhésif à fusion comprenant : un pistolet (12) possédant une tuyère (14) formée avec un passage d'adhésif (56) communiquant avec une source d'adhésif et un passage d'air (94) communiquant avec une source d'air pressurisé ;
    une plaque (18) comportant une protubérance (106) s'étendant vers l'extérieur à partir d'une première surface (102) de ladite plaque, ladite plaque étant réalisée avec une extrémité de tuyère (108) et comportant un alésage traversant (110) s'étendant entre ladite protubérance et ledit orifice de déchargement de ladite extrémité de tuyère ;
    ladite plaque (18) comportant également une pluralité d'alésages de jet d'air (18) s'étendant selon un angle par rapport à l'axe longitudinal dudit alésage traversant (110) de ladite plaque ;
    des moyens de coiffage (62) permettant de monter ladite plaque sur ladite tuyère (14) du pistolet (12) de façon que ledit alésage traversant (110) réalisé entre ladite protubérance et ledit orifice de déchargement de l'extrémité de tuyère communique avec ledit passage d'adhésif (56) de ladite tuyère et de façon que lesdits alésages de jet d'air communiquent avec ledit passage d'air (94) de ladite tuyère, ledit alésage traversant recevant l'adhésif provenant du passage d'adhésif et éjectant l'adhésif à partir dudit orifice de déchargement de l'extrémité de tuyère pour former un filet adhésif (130), lesdits alésages de jet d'air recevant de l'air pressurisé provenant du passage d'air de la tuyère et dirigeant l'air pressurisé substantiellement selon la tangente à la périphérie externe dudit filet adhésif afin de former une fibre allongée d'adhésif et imprimer un mouvement de torsion à ladite fibre allongée d' adhésif permettant un dépôt selon un modèle de diffusion en spirale sur un substrat,
    ledit appareil étant caractérisé en ce qu'une extrémité de tuyère (108) s'étend vers l'intérieur à partir d'une seconde surface (104) de ladite plaque en direction de ladite première surface, ladite extrémité de tuyère possédant une surface externe et un orifice de déchargement (109) placé substantiellement dans le même plan que ladite seconde surface de ladite plaque ;
    ladite plaque (18) étant formée avec une rainure annulaire (112) s'étendant vers l'intérieur à partir de ladite seconde surface (104) en direction de ladite première surface (102), ladite rainure annulaire (112) possédant une première portion (114) qui forme ladite surface externe de l'extrémité de tuyère (108) et une seconde portion (116) qui est inclinée par rapport audit alésage traversant (110) de ladite plaque (18) ; et
    ladite plaque (18) étant réalisée avec une pluralité d'alésages de jet d'air (118) s'étendant à partir de ladite rainure annulaire (112) à travers ladite plaque, lesdits alésages de jet d'air possédant chacun un axe longitudinal (122) s'étendant substantiellement perpendiculairement à ladite seconde portion de ladite rainure annulaire.
  5. Appareil de la revendication 4 dans lequel ladite tuyère (14) du pistolet (12) est réalisée avec un logement (136) qui reçoit ladite protubérance (106) de la plaque formant un joint étanche entre ceux-ci.
  6. Appareil de la revendication 4 dans lequel ladite plaque (18) est annulaire et possède un rebord périphérique réalisé avec un évidement (134) qui s'étend à partir de ladite seconde surface (104) en direction de ladite première surface (102) de ladite plaque (18).
  7. Appareil de la revendication 6 dans lequel une portion de ladite tuyère (14) dudit pistolet (12) est réalisée avec des filets externes (60), lesdits moyens de coiffage comprenant un élément en forme de cylindre réalisé avec un alésage traversant définissant une paroi interne possédant des filets adaptés pour correspondre auxdits filets externes (60) de la tuyère (14), ledit élément en forme de cylindre étant réalisé avec un logement annulaire qui s'emboîte avec ledit évidement réalisé dans ladite plaque annulaire afin de maintenir ladite plaque (18), ledit élément en forme de cylindre étant vissé sur la tuyère (14) pour placer ledit alésage traversant (110) de ladite plaque en communication avec ledit passage d'adhésif (56) de la tuyère (14).
  8. Appareil de la revendication 4 dans lequel ladite plaque (18) est réalisée avec une seconde rainure annulaire s'étendant vers l'intérieur à partir de ladite première surface (102) en direction de ladite seconde surface (104) et étant sécante à une extrémité de chacun desdits alésages de jet d'air (118).
EP19890118357 1988-11-07 1989-10-04 Adaptateur d'une tuyère pour un pistolet à adhésif Expired - Lifetime EP0367985B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US26800288A 1988-11-07 1988-11-07
US268002 1988-11-07

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EP0367985A2 EP0367985A2 (fr) 1990-05-16
EP0367985A3 EP0367985A3 (en) 1990-08-08
EP0367985B1 true EP0367985B1 (fr) 1995-02-01

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EP (1) EP0367985B1 (fr)
JP (1) JP2820740B2 (fr)
AU (1) AU620920B2 (fr)
CA (1) CA1316343C (fr)
DE (1) DE68920950T2 (fr)

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US5065943A (en) * 1990-09-06 1991-11-19 Nordson Corporation Nozzle cap for an adhesive dispenser
US5169071A (en) * 1990-09-06 1992-12-08 Nordson Corporation Nozzle cap for an adhesive dispenser
EP0576498B2 (fr) * 1991-03-27 2000-05-17 SCA SCHUCKER GmbH Procede et dispositif d'application d'une matiere pateuse
IT1290135B1 (it) * 1997-03-20 1998-10-19 Comotti Mc S R L Pistola erogatrice-dosatrice particolarmente per l'erogazione di pasta abrasiva
DE19714029C2 (de) * 1997-04-04 1999-06-10 Bargen Rudolf Von Auftragskopf
DE19748908C1 (de) * 1997-11-05 1999-04-22 Wolfgang Puffe Auftragskopf mit einer Kleberdüse mit Dreiecksnadel
US6464785B1 (en) 1997-12-22 2002-10-15 Wolfgang Puffe Rotary applicator head
DE19757238C2 (de) * 1997-12-22 1999-11-25 Wolfgang Puffe Rotationsauftragskopf
EP1082177B1 (fr) 1998-06-03 2007-02-21 Nordson Corporation Procede et dispositif pour l'application de milieux liquides
DE10139633C1 (de) * 2001-08-11 2003-04-24 Amtec Kistler Gmbh Vorrichtung zum Auftragen eines Beschichtungsmittels
KR20030032475A (ko) * 2001-10-18 2003-04-26 기아자동차주식회사 와류식 도포건
US7169228B2 (en) 2004-04-29 2007-01-30 The Procter & Gamble Company Extrusion applicator having linear motion operability
US7097710B2 (en) 2004-04-29 2006-08-29 The Procter & Gamble Company Extrusion applicator having rotational operability
US7524176B2 (en) 2005-06-16 2009-04-28 Sika Technology Ag Nozzle for applying adhesives
DE102013101637B4 (de) 2013-02-19 2017-02-16 Puffe Engineering Gmbh Auftragskopf für viskose Medien
DE102018211676A1 (de) 2018-07-12 2020-01-16 AUDI HUNGARIA Zrt. Schutzkappenelement und Düse mit einem Schutzkappenelement
CN111992429A (zh) * 2020-08-07 2020-11-27 定兴县凌诺商贸有限公司 一种打胶机器人
CN112588519A (zh) * 2020-12-09 2021-04-02 张紫爽 一种瓦楞纸板胶合用的上胶装置
CN115301431B (zh) * 2022-09-14 2023-08-15 华能国际电力股份有限公司 火电机组锅炉管内壁用高粘度浆料雾化喷头
CN115502011B (zh) * 2022-10-18 2023-07-21 东莞鹏龙光电有限公司 一种用于生产显示模组的智能生产设备

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US3152923A (en) * 1961-11-07 1964-10-13 Huntingdon Ind Inc Apparatus for spraying adhesive on cartons
US3923252A (en) * 1974-12-09 1975-12-02 Automation Dev And Engineering Spraying apparatus
US4185981A (en) * 1975-08-20 1980-01-29 Nippon Sheet Glass Co.,Ltd. Method for producing fibers from heat-softening materials
FR2384551A1 (fr) * 1977-03-22 1978-10-20 Skm Sa Procede de pulverisation pneumatique de liquides
US4394967A (en) * 1979-12-18 1983-07-26 Jean Amiaut Gun for applying paints by hot process
DE3540619C1 (de) * 1985-11-15 1987-05-14 Claassen Henning J Vorrichtung zum Verspruehen von klebrigen Auftragmassen
EP0333902A1 (fr) * 1988-03-23 1989-09-27 Nordson Corporation Dispositif d'application d'un haut polymère thermoplastique, en particulier d'un adhésif

Also Published As

Publication number Publication date
EP0367985A2 (fr) 1990-05-16
AU4275789A (en) 1990-05-10
JP2820740B2 (ja) 1998-11-05
DE68920950T2 (de) 1995-06-22
EP0367985A3 (en) 1990-08-08
DE68920950D1 (de) 1995-03-16
JPH02180658A (ja) 1990-07-13
CA1316343C (fr) 1993-04-20
AU620920B2 (en) 1992-02-27

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