EP4063026B1 - Dispositif d'application - Google Patents

Dispositif d'application Download PDF

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Publication number
EP4063026B1
EP4063026B1 EP22159325.4A EP22159325A EP4063026B1 EP 4063026 B1 EP4063026 B1 EP 4063026B1 EP 22159325 A EP22159325 A EP 22159325A EP 4063026 B1 EP4063026 B1 EP 4063026B1
Authority
EP
European Patent Office
Prior art keywords
base body
dispenser according
fastening
dispensing modules
modules
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.)
Active
Application number
EP22159325.4A
Other languages
German (de)
English (en)
Other versions
EP4063026A3 (fr
EP4063026A2 (fr
EP4063026C0 (fr
Inventor
Herr Wolfgang PUFFE
Herr Marcel PUFFE
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.)
Puffe Engineering GmbH
Original Assignee
Puffe Engineering GmbH
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 Puffe Engineering GmbH filed Critical Puffe Engineering GmbH
Publication of EP4063026A2 publication Critical patent/EP4063026A2/fr
Publication of EP4063026A3 publication Critical patent/EP4063026A3/fr
Application granted granted Critical
Publication of EP4063026B1 publication Critical patent/EP4063026B1/fr
Publication of EP4063026C0 publication Critical patent/EP4063026C0/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • B05C5/0275—Coating heads with several outlets, e.g. aligned transversally to the moving direction of a web to be coated flow controlled, e.g. by a valve
    • B05C5/0279—Coating heads with several outlets, e.g. aligned transversally to the moving direction of a web to be coated flow controlled, e.g. by a valve independently, e.g. individually, flow controlled
    • 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
    • B05C5/0245—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 for applying liquid or other fluent material to a moving work of indefinite length, e.g. to a moving web

Definitions

  • the invention relates to an application device for applying a viscous medium, in particular hot melt adhesive, to a substrate, and comprises a base body and a plurality of application heads, which are arranged next to one another in a row along a transverse axis of the application device and are attached to the base body.
  • Such an application device is, for example, from DE 10 2013 101 637 A1 known.
  • Application devices of this type are used in particular for an intermittent application of the medium in the form of dots or beads onto the substrate guided past the application device, for example in the form of a web material.
  • the application device described there has a large number of application heads, each of which includes a housing.
  • the housings each have a nozzle chamber with a feed channel and an outlet nozzle for the viscous medium.
  • a nozzle needle is provided which passes through the nozzle chamber and whose tip rests on a nozzle needle seat of the outlet nozzle in order to close it.
  • the nozzle needle can be displaced axially along an adjustment axis in order to open and close the outlet nozzle.
  • the housing has a cylinder chamber in which a piston is guided in an axially displaceable manner.
  • This piston-cylinder unit is designed as a double-acting pneumatic actuating cylinder and is part of the actuating device for adjusting the nozzle needle.
  • the housing has a rectangular outer profile, transverse to the adjustment axis, so that several application heads can be arranged next to one another in a simple manner, with the application heads being able to rest against one another with side surfaces of the housing.
  • Two screws are provided to fasten the individual application heads. which are guided in the direction of the transverse axis on both sides of the cylinder chamber through fastening openings in the housing and are screwed into threaded holes in the base body.
  • the screws are supported on a side facing away from the base body with a screw head against the housing in order to brace it against the base body.
  • the distance between the application nozzles of the individual application heads is determined on the one hand by the width of the piston or the width of the cylinder chamber in the direction of the transverse axis. On the other hand, the distance between the application nozzles is determined by the thickness of the screws or the screw heads for fastening the application heads.
  • the sizes of the effective piston surfaces of the piston and thus the width of the cylinder chambers are structurally specified to the forces required to close the outlet nozzle by means of the nozzle needle. Particularly when intermittently applying spots of the viscous medium at short intervals, the nozzle needle must be moved quickly, which requires large actuation forces. This requires large piston surfaces, which in the case of circular piston surfaces means that the distances between the application heads and thus the distances between the points that can be applied are relatively large in the direction of the transverse axis.
  • the piston surface has a longitudinal extent in the direction of a longitudinal axis which is greater than a width extent in the direction of a transverse axis arranged transversely to the longitudinal axis.
  • this requires complex production of the cylinder bores and pistons.
  • the document US2008110939 discloses an adhesive dispensing device comprising a dispensing module, a liquid delivery component, and a fastening system.
  • the fastening system includes a stationary component and a fastener pivotally connected to the stationary component.
  • the fastener is configured to apply a clamping force to the delivery module to connect the delivery module to the fluid delivery component.
  • the document EP 0 908 240 A2 discloses a device for dispensing an adhesive.
  • a dispenser module is attached to a service block with mounting screws.
  • the object of the present invention is to provide an application device in which the distance between adjacent outlet nozzles of application heads can be reduced in a simple manner.
  • an application device for applying a viscous medium, in particular hot melt adhesive, to a substrate, which comprises a base body and a plurality of application heads, which are arranged next to one another in a row along a transverse axis of the application device and are attached to the base body.
  • the application heads each have at least one recess which, together with a recess in an adjacent application head, forms a fastening opening.
  • there is a bolt in each of the fastening openings which is fastened to the base body and is supported on a side of the application heads facing away from the base body against both application heads forming the respective fastening opening.
  • At least one of the bolts can be designed as a screw which is screwed into a threaded hole in the base body and has a screw head with which the screw is supported against the application heads on a side facing away from the base body. Each screw is thus axially supported with the screw head against the two application heads, which together form the fastening opening in which the screw sits.
  • the bolt is a threaded bolt that is screwed into a threaded hole in the base body and carries a nut on the side facing away from the base body, which is axially supported against the application heads.
  • the threaded bolt can also be firmly connected to the base body, for example by means of welding, soldering, gluing or similar.
  • the recesses can each be formed in a side surface of the housing of the application heads.
  • Two application heads arranged next to each other can have side walls facing one another, which can also be in contact with one another, whereby the Recesses are arranged in the mutually facing side walls.
  • the recesses can each be designed as a groove in one of the side surfaces of one of the application heads, the groove being open towards an adjacent application head.
  • the mutually facing grooves of adjacent application heads thus together form a continuous channel-like opening.
  • the individual grooves can have any cross-sectional design, for example in the shape of a segment of a circle, a semicircle or in the form of a polygon, such as triangular or rectangular.
  • the application heads can each have two recesses facing away from one another, so that they each form a fastening opening with a recess in an adjacent application head. This means that the application heads can be made narrower on two sides.
  • the fastening openings can be cylindrical.
  • the recesses can each be designed in a semi-cylindrical shape. It is also conceivable that the recesses have the shape of a circular segment in cross section, different from a semicircle, with those recesses that together form a fastening opening are each designed in cross section such that the circular segment-shaped cross sections together form a circular cross section.
  • the application heads can each have a fastening surface with which the application heads are held in contact with the base body.
  • the base body can be heated so that heat transfer from the base body to the application head is ensured through the contact between the fastening surface and the base body.
  • the application device can further comprise end modules which are attached to the base body at the ends of the row of application heads.
  • the end modules can each have a recess which forms a fastening opening with one of the recesses of the adjacent application head.
  • the end modules can each be additionally attached to the base body.
  • they can have a fastening hole in which a fastening screw sits, which is screwed into a threaded hole on the base body.
  • a fastening bolt is provided in the form of a threaded bolt, which is screwed into a threaded hole in the base body and carries a nut on the side facing away from the base body, which is axially supported against the end module.
  • a fastening bolt is provided in the form of a threaded bolt, which is screwed into a threaded hole in the base body and carries a nut on the side facing away from the base body, which is axially supported against the end module.
  • the threaded bolt can also be firmly connected to the base body, for example in a materially bonded manner.
  • the bolt regardless of its design, can penetrate the fastening openings in a direction transverse to the transverse axis.
  • Figure 1 shows a perspective view of an application device with a base body 1, which extends in the direction of a transverse axis Q.
  • a plurality of application heads 2 are arranged in a row next to one another along the transverse axis Q and attached to the base body 1.
  • the individual application heads 2 are coated with viscous medium, in particular hot melt adhesive, via the base body 1. provided.
  • supply channels (not shown) are arranged in the base body 1.
  • the application heads 2 are supplied with compressed air via the base body 1 in order to operate them.
  • a compressed air supply 3 is connected to the base body 1, with compressed air channels (not shown) in the base body 1 connecting the compressed air supply 3 to the application heads 2.
  • an end module 4, 5 is attached to the base body 1.
  • the end modules 4, 5 are “blind modules” that are not used to apply viscous medium. They serve exclusively to attach the application heads to the ends of the row of application heads 2, as will be explained in more detail below.
  • the application device is arranged in such a way that, based on a vertical axis H, which runs perpendicular to the transverse axis Q, a carrier web 6 is moved under the application device in the direction of a transport direction T, with adhesive dots 7 and/or adhesive strips 8 passing through the carrier web 6 during the movement Application heads 2 are applied to the carrier web 6.
  • the transport direction T runs parallel to a longitudinal axis L, which is arranged perpendicular to the transverse axis Q and the vertical axis H.
  • the Figure 2 shows a front view of two application heads 2, 2 ', which are arranged directly next to each other.
  • the Figure 3 shows one of the two in Figure 2 shown application heads 2 in a side view.
  • the two Figures 2 and 3 are described together below.
  • the in Figure 2 Application head 2 shown on the left is described in more detail.
  • the application head 2 'shown on the right, which correspond to features of the left application head 2, is provided with the same reference numbers supplemented by an apostrophe.
  • the application head 2 has an in Figure 2 first side surface arranged on the left and an in Figure 2 second side surface 10 arranged on the right, both of which are arranged perpendicular to the transverse axis Q.
  • the in Figure 2 The application head 2 shown on the left has its second side surface 10 in contact with the first side surface 9 'of the one shown on the right Application head 2'.
  • In the row of application heads 2, 2 'according to Figure 1 are each a first side surface of an application head in contact with a second side surface of a further adjacent application head.
  • the application head 2 has a groove-shaped first recess 11 in the first side surface 9.
  • a groove-shaped second recess 12 is arranged in the second side surface 10.
  • the recesses 11, 12 are semi-cylindrical in shape and extend parallel to the longitudinal axis L of the application device, i.e. transversely to the transverse axis Q.
  • the recess 11, 12 can also have a different cross-sectional shape, such as in the shape of a segment of a circle or rectangular, as long as they are open to the immediately adjacent application head 2, 2 '.
  • a bolt in the form of a screw 14 sits in the fastening opening 13.
  • the screw 14 has a threaded shaft 15 which is guided through the fastening opening 13 and is screwed into a threaded hole 17 in the base body 1.
  • the screw 14 On a side facing away from the base body 1, the screw 14 has a screw head 16, which is axially clamped against clamping surfaces 18 of the two application heads 2 that form the fastening opening 13 and which point away from the base body 1.
  • a fastening surface 19 of the two application heads 2 forming the fastening opening 13 is clamped against the base body 1 in contact. This serves in particular for the temperature transition between the heated base body 1 and a housing of the application head 2.
  • end modules 4, 5 are arranged at the ends of the row of application heads, which have a recess pointing towards the respective adjacent application head in order to form a fastening opening together with the recess of the application head.
  • the end modules 4, 5 are additionally firmly connected to the base body 1 by fastening means not shown here.
  • Figure 4 shows a longitudinal section of the application head according to Figure 3 .
  • the application head comprises a housing 20 in which a piston-cylinder unit is arranged.
  • the piston-cylinder unit has a cylinder which is represented by a cylinder bore 21 within the housing 20.
  • the term "cylinder bore” does not mean that it has to be a bore in the form of a circular cylinder with a circular cross section.
  • the cylinder bore 21 can also have a cross section that is elongated, with the cylinder bore 21 having a greater extent, for example, in the direction of a longitudinal axis L than in the direction of a transverse axis Q, with the longitudinal axis L and the transverse axis Q perpendicular in the exemplary embodiment shown are arranged to each other and perpendicular to the vertical axis H.
  • the cylinder bore 21 starts from a top side of the housing 20 and extends into the depth of the housing 20 in the direction of a vertical axis H.
  • the piston-cylinder unit is used to actuate a nozzle needle 22, which is axially adjustable within the housing 20 along the vertical axis H.
  • An outlet nozzle 23 for the viscous medium, here for a hot melt adhesive, is also provided on the housing 20.
  • the nozzle needle 22 serves to open and close the outlet nozzle 23.
  • the piston-cylinder unit represents an actuating device for the nozzle needle 22.
  • the piston-cylinder unit further comprises a piston 24, which is adapted to the inner contour of the cylinder bore 21 and is guided in the cylinder bore 21 in an axially adjustable manner along the vertical axis H.
  • Two sealing rings 25, 26 serve between the piston 24 and the inner surface of the cylinder bore 21 to seal the piston 24 from the cylinder bore 21.
  • the piston 24 has an upper piston surface 27 and a lower piston surface 28, each of which can be acted upon by compressed air force.
  • the piston-cylinder unit is therefore designed as a pneumatic actuating cylinder. In principle, however, it is also conceivable that it is a hydraulic actuating cylinder.
  • an air inlet 29 is used to open the outlet nozzle 23 and an air inlet 30 is used to close the outlet nozzle 23, the air inlet 29 for opening being connected to a first cylinder space 31 for pressurizing the lower piston surface 27.
  • the air inlet 30 for closing is connected to a second cylinder space 32, which serves to pressurize the upper piston surface 27.
  • the cylinder bore 21 is in the in Figure 4 illustrated orientation of the housing 20 is closed upwards by a cover 33, which is sealed in the cylinder bore 21 by means of sealing rings 34 and is fixed to the housing 20 by fastening screws (not shown).
  • a spring element 35 is arranged in the cover 33, which is supported on the one hand against the cover 33 and on the other hand against the piston 24 and acts on the piston 24 in the direction of a closed position for closing the outlet nozzle 23. This ensures that the outlet nozzle 23 is closed even in the event of a pressure loss in the cylinder spaces 31, 32.
  • the nozzle needle 22 is firmly connected to the piston 24 and is axially displaced by it.
  • the nozzle needle 22 is guided through a needle channel 36 within the housing 20 and extends to the outlet nozzle 23, which is located on the side of the housing 20 facing away from the cover 33.
  • the needle channel 36 is adjoined by a nozzle chamber 37, through which the nozzle needle 22 is also guided.
  • the nozzle chamber 37 is connected via a feed channel 38 to an inlet 39 for viscous medium, here hot-melt adhesive, and is supplied with hot-melt adhesive via this.

Landscapes

  • Coating Apparatus (AREA)

Claims (13)

  1. Dispositif d'application conçu pour l'application d'un agent visqueux, en particulier d'une colle thermofusible, sur un substrat, comportant :
    un corps de base (1),
    plusieurs têtes d'application (2, 2') qui sont disposées en rangée l'une à côté de l'autre le long d'un axe transversal (Q) du dispositif d'application et fixées sur le corps de base (1),
    caractérisé en ce
    que les têtes d'application (12, 12') comportent respectivement au moins un évidement (11, 11', 12, 12') qui constituent conjointement avec un évidement (11, 11', 12, 12') d'une tête d'application voisine (2, 2') une percée de fixation (13), et
    que dans les percées de fixation (13) est respectivement logé un boulon (14), qui est fixé sur le corps de base (1) et qui s'appuie sur un côté opposé au corps de base (1) des têtes d'application (2, 2') contre les deux têtes d'application (2, 2') constituant les percées de fixation respectives (13) .
  2. Procédé selon la revendication 1,
    caractérisé en ce
    qu'au moins l'un des boulons est configuré en tant que de vis (14) qui est vissée dans un trou taraudé (17) du corps de base (1) et qui comporte une tête de vis (16) par laquelle la vis (14) s'appuie sur un côté opposé au corps de base (1) des têtes d'application (2, 2') contre celles-ci.
  3. Procédé selon la revendication 1 ou 2,
    caractérisé en ce
    que les évidements (11, 11', 12, 12') sont respectivement configurés en une surface latérale (9, 10, 10') d'une tête d'application (2, 2').
  4. Dispositif d'application selon l'une des revendications 1 à 3,
    caractérisé en ce
    que deux têtes d'application (2, 2') respectivement disposées l'une à côté de l'autre comportent des côtés latéraux tournés l'un vers l'autre (9, 9', 10, 10'), si bien que les évidements (11, 11', 12, 12') sont disposés dans les côtés latéraux tournés l'un vers l'autre (9, 9', 10, 10').
  5. Dispositif d'application selon la revendication 3 ou 4,
    caractérisé en ce
    que les évidements (11, 11', 12, 12') sont respectivement configurés en tant que rainure sur l'une des surfaces latérales (9, 9', 10, 10') d'une tête d'application (2, 2'), de sorte que la rainure est ouverte en direction d'une tête d'application (2, 2') voisine.
  6. Dispositif d'application selon l'une des revendications 1 à 5,
    caractérisé en ce
    que les têtes d'application (2, 2') comportent respectivement deux évidements (11, 11', 12, 12') qui sont tournées dans une direction opposée l'une de l'autre.
  7. Dispositif d'application selon l'une des revendications 1 à 6,
    caractérisé en ce
    que les percées de fixation (13) sont en forme de cylindre.
  8. Dispositif d'application selon l'une des revendications 1 à 7,
    caractérisé en ce
    que les évidements (11, 11', 12, 12') sont en forme de demi-cylindre.
  9. Dispositif d'application selon l'une des revendications 1 à 8,
    caractérisé en ce
    que les têtes d'application (2, 2') comportent respectivement une surface de fixation (19) par laquelle les têtes d'application (2, 2') sont maintenues en contact avec le corps de base (1).
  10. Dispositif d'application selon l'une des revendications 1 à 9,
    caractérisé en ce
    qu'aux extrémités de la rangée de têtes d'application (2, 2'), un module d'extrémité (4, 5) est fixé respectivement sur le corps de base (1).
  11. Dispositif d'application selon l'une des revendications 1 à 10,
    caractérisé en ce
    que les modules d'extrémité (4, 5) comportent respectivement un évidement qui constitue une percée de fixation (13) avec l'un des évidements (11, 11', 12, 12') de la tête d'application voisine respective (2, 2').
  12. Dispositif d'application selon l'une des revendications 1 à 11,
    caractérisé en ce
    que les modules d'extrémité (4, 5) comportent respectivement un alésage de fixation dans lequel est logé une vis de fixation qui est vissée dans un trou taraudé du corps de base (1).
  13. Dispositif d'application selon l'une des revendications 1 à 12,
    caractérisé en ce
    que les boulons (14) traversent les percées de fixation (13) respectivement dans une direction perpendiculaire à l'axe transversal (Q).
EP22159325.4A 2021-03-23 2022-03-01 Dispositif d'application Active EP4063026B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102021107264.6A DE102021107264A1 (de) 2021-03-23 2021-03-23 Auftragsvorrichtung

Publications (4)

Publication Number Publication Date
EP4063026A2 EP4063026A2 (fr) 2022-09-28
EP4063026A3 EP4063026A3 (fr) 2022-10-19
EP4063026B1 true EP4063026B1 (fr) 2023-09-20
EP4063026C0 EP4063026C0 (fr) 2023-09-20

Family

ID=80623453

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22159325.4A Active EP4063026B1 (fr) 2021-03-23 2022-03-01 Dispositif d'application

Country Status (5)

Country Link
US (1) US20220305518A1 (fr)
EP (1) EP4063026B1 (fr)
DE (1) DE102021107264A1 (fr)
ES (1) ES2962138T3 (fr)
PL (1) PL4063026T3 (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5875922A (en) * 1997-10-10 1999-03-02 Nordson Corporation Apparatus for dispensing an adhesive
DE20020564U1 (de) 2000-12-05 2001-05-03 Nordson Corp Westlake Vorrichtung zum Abgeben von Fluiden, insbesondere fließfähigem Klebstoff
US9914147B2 (en) 2006-01-06 2018-03-13 Nordson Corporation Liquid dispenser having individualized process air control
US8061564B2 (en) * 2006-11-15 2011-11-22 Nordson Corporation Liquid dispensing apparatus including an attachment member
DE102013101637B4 (de) 2013-02-19 2017-02-16 Puffe Engineering Gmbh Auftragskopf für viskose Medien

Also Published As

Publication number Publication date
EP4063026A3 (fr) 2022-10-19
ES2962138T3 (es) 2024-03-15
US20220305518A1 (en) 2022-09-29
EP4063026A2 (fr) 2022-09-28
DE102021107264A1 (de) 2022-09-29
EP4063026C0 (fr) 2023-09-20
PL4063026T3 (pl) 2024-02-26

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