EP0224916B1 - Dispositif d'application intermittente d'adhésifs liquides - Google Patents

Dispositif d'application intermittente d'adhésifs liquides Download PDF

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Publication number
EP0224916B1
EP0224916B1 EP86116787A EP86116787A EP0224916B1 EP 0224916 B1 EP0224916 B1 EP 0224916B1 EP 86116787 A EP86116787 A EP 86116787A EP 86116787 A EP86116787 A EP 86116787A EP 0224916 B1 EP0224916 B1 EP 0224916B1
Authority
EP
European Patent Office
Prior art keywords
valve
nozzle
reservoir
main valve
valves
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.)
Expired
Application number
EP86116787A
Other languages
German (de)
English (en)
Other versions
EP0224916A1 (fr
Inventor
Henning J. Claassen
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
Individual
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 Individual filed Critical Individual
Priority to AT86116787T priority Critical patent/ATE41327T1/de
Publication of EP0224916A1 publication Critical patent/EP0224916A1/fr
Application granted granted Critical
Publication of EP0224916B1 publication Critical patent/EP0224916B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
    • B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
    • B05C5/0225—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
    • 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
    • B05C5/0258—Coating heads with slot-shaped outlet flow controlled, e.g. by a valve
    • 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

Definitions

  • the invention relates to a device for the intermittent application of liquid adhesive, in particular hot-melt adhesive, to material moving relative to the device of the type specified in the preamble of claim 1.
  • Such a device is particularly suitable for the application of viscous material such as melted hot melt adhesive.
  • EP-C 0 111 850 discloses a device for the intermittent application of a liquid of the specified type, in which the simple shut-off valve in the feed line by means of a valve arrangement with two, which works according to the principle of a three-way valve separate, mechanically coupled needle valves are replaced, which are alternately opened and closed.
  • the liquid in the supply line does not stand still during the non-order time, but can flow back via a return line, which is opened each time the supply of liquid to the application nozzle is interrupted.
  • the constant change between full dynamic pressure and dynamic pressure in the nozzle area is avoided.
  • the cleanliness when inserting the application head in particular at a high frequency of the interruption of the order and high relative speed between the web and the application nozzle, leaves something to be desired.
  • the present invention therefore has the task of developing the device according to the preamble of claim 1 in particular in such a way that an optimally dimensioned job is carried out, especially at the beginning and end of the job, even when the web arrangement is moving very quickly and the working frequency is high.
  • the invention solves this problem according to the characterizing part of claim 1 in that the nozzle arrangement has two series-connected shut-off valves, the main valve of which is connected directly upstream of the nozzle and can interrupt the flow from the reservoir to the nozzle, while a preliminary valve upstream of the main valve is a return line connecting to the line Shut off the reservoir and that both valves can be controlled in an adjustable temporal relationship to each other.
  • a valve arrangement makes it possible, by means of the pilot valve, to regulate the pressure ratios in the main valve exactly as desired, both when opening and closing, and both from the beginning to the end of the usually short application distance, a constant application thickness and also a clean insertion and termination of the order.
  • the pilot valve is only closed shortly after the main valve has been opened (the time delay is of course very small), not only the excessive job which normally occurs when only one valve is present at the start of the job is prevented.
  • the job is also used extremely evenly and razor-sharp, as was previously not possible. By regulating the time interval, practically any desired use of the job can be achieved here.
  • the valve remote from the nozzle is opened shortly before (the time difference is also very small here).
  • the time difference is also very small here.
  • the main valve closes the last remainder of the adhesive already comes out at a lower pressure, which is particularly advantageous if the main valve is one which, when it closes in the direction of flow, has an additional thrust on the needle valve.
  • opening the pilot valve shortly before the main valve closes reduces the pressure in the area between the outlet slot of the nozzle and the main valve, which counteracts any kind of dripping of the nozzle. This advantage is achieved regardless of how the main valve is constructed.
  • the length of the line from the pre-valve to the main valve should be short. It is advantageously not much larger, but also not much smaller than the path from the main valve to the nozzle outlet opening and is advantageously three to six times this path.
  • at least one of the valves - preferably also the other - is a needle valve.
  • Such needle valves have the great advantage that they are in the form of finished units Trade are available and are also particularly well suited for the specific task here.
  • valves Since in many cases the valves have to be actuated very quickly, the valves can preferably be actuated pneumatically. If the pneumatic actuation pressure is selected to be sufficiently high and the areas acted upon by it are correspondingly large, extremely rapid and reliable valve actuation can be achieved.
  • the pneumatically actuated valves preferably carry differential pistons on their shafts, the smaller surface of which is constantly under pressure, which keeps the valve closed or strives to close it, and whose larger surface can be acted upon by pressure medium from the opposite side in order to open the valve .
  • the control of the valve loading with pressure medium - generally compressed air - is preferably carried out electromagnetically, since in this way it is possible to actuate the valves very precisely and quickly, even at a high frequency.
  • the drawing shows a view of the device according to the invention from the side, for the sake of clarity the storage container for pressurized hot melt adhesive including the feed pump required for this and the connecting lines to the application head are not shown.
  • the application head shown in the drawing has an application nozzle 1 on its underside, which at 2 has an application slot extending perpendicular to the plane of the drawing, from which hot-melt adhesive is to be applied intermittently to the material web indicated at 3.
  • the material web is moved under the application nozzle at a small distance of, for example, half a millimeter at a speed of, for example, 250 m / min.
  • Hot melt adhesive should be applied with the nozzle at intervals of, for example, 2 cm over a length of 4 cm.
  • the nozzle is screwed onto the application head 4 from below, which essentially holds and supports the valve arrangement.
  • the feed channel 5 for hot melt adhesive which is closed at the top by a valve seat body 6, which sits pressure-tight by means of O-rings in a correspondingly stepped bore 7 of the head 4.
  • the needle 8 of a needle valve 9 which, in its lowered position, which is shown in the drawing, closes the valve seat in the valve seat body 6 and, in the raised state, the inflow of hot-melt adhesive through the horizontal line 10 to channel 9 allows.
  • the needle valve 9 is the main valve. It is commercially available.
  • the valve needle further carries a differential piston, not shown, whose smaller upward-facing surface is under the pressure of air, which tends to press the valve needle down into the valve seat and thereby close the main valve.
  • the compressed air is fed via line 12 to the top of the cylinder of the differential piston valve 9.
  • Air is supplied through line 13 from the same pressure to the underside of the piston, which is correspondingly larger, so that when the air supply is switched from line 12 to line 13, the differential piston is suddenly raised and the valve is opened by the needle 8 is lifted off the seat.
  • An electromagnetically operated reversing valve 15 is used to reverse the compressed air supply from line 12 to line 13 and vice versa.
  • Such electromagnetic reversing valves 15 for compressed air and the needle valve 9 are known and are therefore only described schematically here.
  • the horizontal channel 10 indicated by dotted lines in the right half of the application head 4 connects to a connection piece 20 to which an insulated supply hose (not shown) for hot melt adhesive is attached.
  • the other end of the supply hose sits at the outlet of the pressure and feed pump for the hot melt adhesive.
  • the pump is provided with a pressure relief valve in the usual way, which opens when the pressure on the pressure side of the pump increases, and opens the hot melt adhesive back into the supply for liquid hot melt adhesive can flow back.
  • a second needle valve 25 is arranged above the horizontal feed bore 10, which has essentially the same structure as the valve 9 and is also actuated in the same way by means of a solenoid valve. This valve arrangement is therefore not described in more detail in terms of structure and control.
  • a vertical bore 26 extends downward from the horizontal feed bore 10, which then bends to the right in the drawing and leads to the connection piece 28, from which a pressure hose for excess hot melt adhesive leads back to the reservoir for liquid hot melt adhesive.
  • the entrance of the bore 26 from the horizontal bore 10 is closed by the valve needle 30 of the second needle valve 25, which valve needle is held wider than the needle 8. Needle 30 is of course dimensioned such that it does not oppose the flow of hot-melt adhesive in bore 10 with too high a resistance.
  • the bore 26 is dimensioned large enough to allow the hot melt adhesive supplied through the connector 20 to be returned through the connector 28 without undesirably high throttling.
  • the electromagnetic control valves 15 and 30 for the needle valves 9 and 25 are actuated electromagnetically at desired intervals and time intervals.
  • the control is carried out with the help of a so-called microprocess sors, who can control the opening and closing of the two needle valves 9 and 25 with very high accuracy at desired time intervals and displacements with respect to one another.
  • the supply channel 5 bends inside the nozzle body to about half the height of the same in the drawing, in order then to flow into a distribution chamber in the region of the parting line 5a between the right and left parts of the nozzle body the drawing extends perpendicular to the plane of the drawing and symmetrically with respect to the plane of the angled feed channel 5.
  • the hot-melt adhesive then flows vertically from this spreading chamber through a slot of constant width and constant thickness down to the outlet opening, from where it lies on the web material 3.
  • the slot is formed by a milling in the left part of the nozzle body in the drawing, while the spreading chamber is formed by a recess in the right part of the nozzle body, so that, as far as the flow of the hot melt adhesive in the horizontal direction is concerned, it first flows into the spreading chamber. in which it spreads in both directions perpendicular to the plane of the drawing across the width of the nozzle, but then has to flow back to the area of the slot in the horizontal direction.
  • Such training has proven to be particularly advantageous.
  • the needle of the same z. B. have a thickening that closes the line to the main valve with its lower end and the return line with its upper end. This enables the pressure behind the pilot valve to be controlled even more precisely.

Landscapes

  • Coating Apparatus (AREA)

Claims (6)

1. Dispositif d'application intermittente d'adhésifs liquides, en particulier d'adhésifs thermofusi- bles, sur des matériaux (3) déplacés par rapport au dispositif, comprenant un réservoir pour l'adhésif, une buse d'application (1) réalisée, de préférence, sous la forme d'une filière plate ou avec une pluralité de canaux d'application juxtaposés, une conduite d'amenée (20) du réservoir à la buse (1), une soupape à pointeau (9) prévue immédiatement en amont de la buse (1) dans la conduite (20) et destinée à interrompre à des intervalles voulus le courant du réservoir vers la buse (1), une conduite de retour (26, 28) raccordée à la conduite d'amenée (20, 10), en amont de la soupape principale (9), et une seconde soupape à pointeau (25) pour le blocage de la conduite de retour (26, 28), caractérisé en ce que la seconde soupape à pointeau (25) est plus grande que la soupape principale (9) et qu'elle est placée en tant que soupape d'entrée (25) dans la conduite d'amenée (20), à faible distance en amont de la soupape principale (9), et que les deux soupapes (9, 25) peuvent être commandées en relation temporelle réglable l'une par rapport à l'autre.
2. Dispositif selon la revendication 1, caractérisé en ce que les soupapes (9, 25) peuvent être actionnées de manière pneumatique.
3. Dispositif selon la revendication 2, caractérisé en ce que les soupapes (9, 25) portent sur leurs tiges (8, 30) des pistons différentiels dont la surface plus petite est constamment soumise à l'action d'une pression qui maintient la soupape en position de fermeture ou s'efforce de fermer cette dernière, et dont la surface plus grande peut être alimentée en fluide sous pression pour l'ouverture de la soupape.
4. Dispositif selon l'une des revendications 1 à 3, caractérisé en ce que la commande de la soupape se fait de manière électromagnétique (15, 30).
5. Dispositif selon l'une des revendications 1 à 4, caractérisé en ce que la fermeture de la soupape d'entrée (28) n'intervient que peu après l'ouverture de la soupape principale (9).
6. Dispositif selon l'une des revendications 1 à 5, caractérisé en ce que l'ouverture de la soupape d'entrée (25) intervient peu avant la fermeture de la soupape principale (9).
EP86116787A 1985-12-04 1986-12-03 Dispositif d'application intermittente d'adhésifs liquides Expired EP0224916B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86116787T ATE41327T1 (de) 1985-12-04 1986-12-03 Vorrichtung zum intermittierenden auftragen von fluessigem klebstoff.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3542903 1985-12-04
DE19853542903 DE3542903A1 (de) 1985-12-04 1985-12-04 Vorrichtung zum intermittierenden auftragen von fluessigkeiten wie klebstoff

Publications (2)

Publication Number Publication Date
EP0224916A1 EP0224916A1 (fr) 1987-06-10
EP0224916B1 true EP0224916B1 (fr) 1989-03-15

Family

ID=6287633

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86116787A Expired EP0224916B1 (fr) 1985-12-04 1986-12-03 Dispositif d'application intermittente d'adhésifs liquides

Country Status (7)

Country Link
US (1) US4744330A (fr)
EP (1) EP0224916B1 (fr)
JP (1) JPS62144777A (fr)
AT (1) ATE41327T1 (fr)
DE (1) DE3542903A1 (fr)
ES (1) ES2008081B3 (fr)
GR (1) GR3000040T3 (fr)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3721593A1 (de) * 1987-06-30 1989-01-26 Henning J Claassen Vorrichtung zum auftragen von fluessigen klebstoffen auf ein substrat
US4995338A (en) * 1987-09-24 1991-02-26 Honda Giken Kogyo Kabushiki Kaisha Coating apparatus
SE459478B (sv) * 1987-10-14 1989-07-10 Scandot System Ab Anordning vid ventil avsedd foer utmatning av hoegviskoest medium
DE3736725A1 (de) * 1987-10-29 1989-05-11 Martin Bernhard Dipl Ing Fh Verfahren und einrichtung zur kontrollierten auftragung von klebepunkten
US5145689A (en) * 1990-10-17 1992-09-08 Exxon Chemical Patents Inc. Meltblowing die
US5622747A (en) * 1991-09-18 1997-04-22 National Semiconductor Corporation Method for dispensing a layer of photoresist on a wafer without spinning the wafer
DE69204170T2 (de) * 1991-11-01 1996-01-18 Minnesota Mining & Mfg Vorrichtung zum intermittierenden auftragen.
DE4315469A1 (de) * 1993-05-10 1994-11-17 Ver Glaswerke Gmbh Verfahren und Vorrichtung zum Aufextrudieren eines kalibrierten Profilstrangs aus einem thermoplastischen Polymer auf Gegenstände
ITBO940257A1 (it) * 1994-06-02 1995-12-02 Gd Spa Dispositivo erogatore di sostanze fluide.
EP0720872B1 (fr) * 1994-12-27 2001-07-11 Matsushita Electric Industrial Co., Ltd. Appareil et procédé de revêtement intermittant, méthode de fabrication d'électrodes de piles, et cellule à électrolyte non-aqueux
JP3165043B2 (ja) * 1996-09-05 2001-05-14 東レエンジニアリング株式会社 液体塗布装置
JP2002531242A (ja) 1998-12-03 2002-09-24 ノードソン コーポレーション 高温圧力モニタリング熱再循環マニホールドを備えているホットメルト材料塗布システム
US7105203B1 (en) * 1999-02-10 2006-09-12 Mastsushita Electric Industrial Co., Ltd. Intermittent coating apparatus and intermittent coating method
ITBO20010315A1 (it) * 2001-05-18 2002-11-18 Scm Group Spa Gruppo distributore di colla in particolare per macchine per la lavorazione di pannelli di legno
JP3957640B2 (ja) * 2002-02-21 2007-08-15 アイシン化工株式会社 幅広スリットノズル及び幅広スリットノズルによる塗装方法
DE102010024361A1 (de) † 2010-06-18 2011-12-22 Focke & Co. (Gmbh & Co. Kg) Verfahren und Vorrichtung zum Auftragen von Leim auf Zuschnitte
DE102014010843B4 (de) 2014-07-24 2020-12-03 Technische Universität Braunschweig Dosierdüse und Verfahren zum dosierten Auftragen hochviskoser Medien

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0111850A1 (fr) * 1982-12-16 1984-06-27 Nordson Corporation Distributeur de fluide travaillant à pression constante et par intermittence

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Publication number Priority date Publication date Assignee Title
US3126574A (en) * 1964-03-31 Plow type glue gun
DE1115121B (de) * 1960-08-18 1961-10-12 Windmoeller & Hoelscher Vorrichtung zum Auftragen von Klebstoff auf eine laufende Bahn aus Papier od. dgl.
DE1163650B (de) * 1963-01-19 1964-02-20 Brodbeck Adolf Beleimungsvorrichtung für Hülsenwickelmaschinen.
US3348520A (en) * 1965-09-16 1967-10-24 Lockwood Tech Applicator system for hot melt adhesive and the like
US3420208A (en) * 1966-12-02 1969-01-07 Lockwood Tech Pneumatically controlled applicator system for adhesive and the like
BE756865A (fr) * 1970-01-05 1971-03-01 Acumeter Lab Appareil applicateur de fluide
CH597928A5 (en) * 1975-07-24 1978-04-14 Ciba Geigy Ag Cascade distributor head for coating substances
JPS5286530A (en) * 1976-01-14 1977-07-19 Nippon Gurei Kk Unloader device for painting device
US4320858A (en) * 1980-03-13 1982-03-23 Mercer Corporation Hot melt adhesive applicator
JPS5941818B2 (ja) * 1981-09-21 1984-10-09 三浦工業株式会社 半開放形遠心羽根車のバランス取り方法
DE3200469C2 (de) * 1982-01-09 1985-01-03 Dittberner GmbH, 4006 Erkrath Einrichtung zum längenabschnittweisen Auftragen von Leim auf eine laufende Bahn
US4535719A (en) * 1984-04-06 1985-08-20 Nordson Corporation Liquid dispensing gun with substrate separator
JPS60255165A (ja) * 1984-05-31 1985-12-16 Nissan Shatai Co Ltd シ−リング材塗布装置

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0111850A1 (fr) * 1982-12-16 1984-06-27 Nordson Corporation Distributeur de fluide travaillant à pression constante et par intermittence

Also Published As

Publication number Publication date
ATE41327T1 (de) 1989-04-15
ES2008081B3 (es) 1989-07-16
US4744330A (en) 1988-05-17
JPH0586269B2 (fr) 1993-12-10
DE3542903C2 (fr) 1991-08-08
DE3542903A1 (de) 1987-06-11
EP0224916A1 (fr) 1987-06-10
GR3000040T3 (en) 1990-01-31
JPS62144777A (ja) 1987-06-27

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