EP0366962B1 - Buse à fente - Google Patents

Buse à fente Download PDF

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Publication number
EP0366962B1
EP0366962B1 EP89118397A EP89118397A EP0366962B1 EP 0366962 B1 EP0366962 B1 EP 0366962B1 EP 89118397 A EP89118397 A EP 89118397A EP 89118397 A EP89118397 A EP 89118397A EP 0366962 B1 EP0366962 B1 EP 0366962B1
Authority
EP
European Patent Office
Prior art keywords
slot
valve
nozzle body
passage
shut
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 - Lifetime
Application number
EP89118397A
Other languages
German (de)
English (en)
Other versions
EP0366962A3 (en
EP0366962A2 (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
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 EP0366962A2 publication Critical patent/EP0366962A2/fr
Publication of EP0366962A3 publication Critical patent/EP0366962A3/de
Application granted granted Critical
Publication of EP0366962B1 publication Critical patent/EP0366962B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B05C5/0254—Coating heads with slot-shaped outlet
    • B05C5/0258—Coating heads with slot-shaped outlet flow controlled, e.g. by a valve

Definitions

  • the invention relates to a slot nozzle for applying a liquid, high-polymer material, in particular a hot melt adhesive based on polyurethane, of the type specified in the preamble of claim 1.
  • a slot nozzle emerges with a nozzle body, a feed channel for liquid material in the nozzle body, a controllable shut-off valve in the feed channel, a spreading chamber which adjoins the feed channel in the direction of flow, and with one with the spreading chamber connected exit slot, so that a closed layer of the liquid, high-polymer material can be applied to the substrate to be coated, usually a web that is moved past under the nozzle body.
  • a slot nozzle of the type specified is apparent from WO-A-88/01542, which has a nozzle body, a feed channel for the liquid material in the nozzle body, a controllable shut-off valve, a spreading chamber adjoining the feed channel and an outlet slot connected to the spreading chamber .
  • the known slot nozzle namely, the liquid, highly polymeric material, generally a hot melt adhesive
  • the liquid, highly polymeric material generally a hot melt adhesive
  • the known slot nozzle contains a heating device which maintains a certain temperature of the hot melt adhesive flowing through the inner passage and thus prevents hardening.
  • the invention has for its object a slot nozzle of the specified To create genre that on the one hand guarantees a perfect demolition and on the other hand largely prevents the premature reaction of the liquid, high-polymer material.
  • the liquid, highly polymeric material flows in a straight line through the feed channel with the shut-off valve into the spreading chamber and is then only deflected into the outlet slot, so that there are practically no dead spaces and thus the reaction of relevant amounts of material in such dead spaces is excluded.
  • the shut-off valve is therefore not, as in the prior art, in its own application head connected to the nozzle body, but in the nozzle body itself, so that a very compact structure results.
  • This spatial arrangement contributes to the liquid, highly polymeric material being able to pass from the feed channel via the spreading chamber into the outlet slot without significant kinks. It has proven to be advantageous if the distance between the shut-off point on the one hand and the entry into the distribution channel on the other hand is a maximum of 50 mm; very good results are obtained with a distance of about 25 mm.
  • the basic structure of the nozzle body known from DE-PS 35 41 784 can be used for this slot nozzle, in particular the structure of two parts which are connected to one another, in particular screwed together.
  • the feed channel with the shut-off valve extends through a nozzle body part, while the outlet slot is located in the interfaces between the two parts and is formed either by a so-called "mask plate” or by a cutout in one of the two surfaces of the two nozzle body parts.
  • the spreading chamber can either be located in the same part of the nozzle body as the feed channel or in the other part of the nozzle body. It only has to be ensured that the liquid, highly polymeric material flows as straight as possible from the feed channel via the spreading chamber into the outlet slot.
  • the slot nozzle shown in FIG. 1, generally indicated by the reference numeral 10, has a nozzle body which consists of two plate-shaped parts 12 and 14 screwed together.
  • nozzle body which consists of two plate-shaped parts 12 and 14 screwed together.
  • two connecting screws 16 can be seen, the heads of which are countersunk in the surface of the part 14.
  • the nozzle body is provided with holes in which heating cartridges are located. Such a bore is indicated by reference number 18. As a rule, several heating holes with heating cartridges are provided, in both parts 12, 14.
  • a transverse channel 18 extends, which runs perpendicular to the sectional plane in FIG. 1, has a circular cross section and is connected to a melting device (not shown) which connects the usually solid or at least viscous, high-polymer material, in particular a hot melt adhesive based on polyurethane, melts and supplies the transverse channel 18 under pressure.
  • shut-off valves 20 Several bores run at right angles to this transverse channel 18, are used in the shut-off valves 20; Although only one shut-off valve 20 is shown in the sectional view according to FIG. 1, several shut-off valves 20 are generally used, as can also be seen from FIG. 2, which indicates a total of four shut-off valves 20.
  • Each shut-off valve 20 consists of a valve body 22 which is inserted into the bore of part 12 and has a bore in which a valve needle 24 can be pushed back and forth.
  • the valve needle 24 is provided at its upper end with a piston 26 which is located in a piston chamber 28; the piston chamber has two compressed air connections, to which compressed air is alternately supplied in the direction of the arrows; as a result, the two surfaces of the piston 26 are acted upon alternately by compressed air, so that the piston 26 and thus the valve needle 24 are pushed back and forth pneumatically.
  • valve body 22 ends somewhat above the transverse bore 18, a hole is formed surrounding the transverse bore 18, the bottom of which is covered with an exchangeable, plate-shaped seat 32 for the valve needle 24.
  • the seat 32 has a bore 34 aligned with the bore for the valve needle 24 in the valve body 22, so that the tip of the valve needle 24 penetrates into the bore 34 in the seat 32 at one end of its stroke and closes it. This position is indicated in Figure 1.
  • valve needle 24 clears the bore 34 in the seat 32 so that the liquid, highly polymeric thermoplastic material can flow out of the transverse bore 18 through the hole 19 into the bore 34 of the seat 32.
  • an elongated spreading chamber 37 which extends almost over the entire length of the nozzle body from the two parts 12, 14 and is also aligned with the bores 36 so that the liquid, highly polymeric thermoplastic material is in a straight line from the hole 19th can flow into the spreading chamber 37 via the bore 34 in the seat 32 and the bore 36 in the part 12 and is thereby distributed uniformly over almost the entire length of the nozzle body 12, 14.
  • the actual outlet slot 38 is arranged between the two end faces of the two parts 12, 14, which in the embodiment shown is formed by milling in the end face of the part 14.
  • the slot can also be formed by a so-called “mask sheet”, that is to say a sheet metal piece clamped between the two parts 12, 14 with a recess forming the slot.
  • the slot 38 extends in any case from the lower edge of the nozzle body 12, 14 up to the spreading chamber 37.
  • the lower surfaces of the two parts 12, 14 are chamfered in the usual way; in addition, the lower edge of the left part 12 facing the exit slot 38 is slightly advanced (at 48), so that a tear-off edge is formed.
  • the slot nozzle 10 receives the liquefied, high-polymer, thermoplastic material, in particular a hot melt adhesive based on polyurethane, under pressure from a liquefaction device via the transverse bore 18; from the transverse bore 18 the material reaches the various holes 19 and is under pressure there, since in the position shown in FIG. 1 the tip of the valve needle 24 is located in the outlet bore 34 of the seat 32 and the bore 36 is thus blocked.
  • thermoplastic material in particular a hot melt adhesive based on polyurethane
  • the piston 26 By acting on the surface of the piston 26 facing the valve body 22, the piston 26 is pneumatically displaced upward, so that the valve needle 24 moves upward and thus clears the bore 34, so that the liquid, highly polymeric thermoplastic material through the bore 34 in the seat 32, the bore 36 and the expansion chamber 37 can pass into the outlet slot 38 over the entire length.
  • valve needle 24 By pressurizing the surface of the piston 26 facing away from the valve body 22 with compressed air, the valve needle 24 is moved downward again, thereby blocking the bore 34, so that the application of the high-polymer material is interrupted.
  • valves four in the embodiment shown, can be provided, each of which supplies parts of the spreading chamber 37 with the liquid, high-polymer material.
  • the spreading chamber 37 can also be located in the end face of the part 12; it is only essential that the liquid, highly polymeric material coming from the individual bores 36 is distributed uniformly over the entire length of the spreading chamber 37 and thus of the outlet slot 38.
  • the material After leaving the transverse bore 18, the material flows in a straight line over a short distance from the hole 19 through the bores 34, 36 into the spreading chamber 37; the bending at the transition from the expansion chamber 37 into the slot 38 is only slight, since the bore 36 and slot 38 run at an angle of 120 ° to one another.
  • FIG. 3 shows part 14 with the spreading chamber 37 and the cutout forming the outlet slot 38 in the end face of part 14.
  • FIG. 2 shows a perspective side view of the nozzle body with the two parts 12, 14, four schematically indicated shut-off valves 20, the spreading chamber 37 and the outlet slot 38.

Landscapes

  • Coating Apparatus (AREA)
  • Nozzles (AREA)
  • Percussion Or Vibration Massage (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Claims (12)

  1. Buse à fente pour l'application d'un matériau liquide à haut poids moléculaire, en particulier une colle fusible à base de polyuréthanne, comprenant
    a) un corps de buse,
    b) un canal d'amenée pour le matériau liquide dans le corps de buse,
    c) une soupape d'arrêt commandée,
    d) une chambre d'étalement faisant suite au canal d'amenée, et
    e) une fente de sortie raccordée à la chambre d'étalement,
    caractérisée en ce que
    la soupape d'arrêt (20) est intégrée dans le corps de buse (12, 14) de telle façon que le canal d'amenée (34) est disposé à proximité immédiate de la chambre d'étalement (37), que le canal d'amenée (34) communique avec la chambre d'étalement (37) par l'intermédiaire d'une section rectiligne (36) placée dans le corps de buse (12, 14), la section (36) située dans le corps de buse (12, 14) présentant une faible longueur, et que le corps de buse (12, 14) présente un canal transversal (18) pour le matériau liquide à haut poids moléculaire, qui communique avec une chambre (19) disposée entre le corps de soupape (22) et le canal d'amenée (34).
  2. Buse à fente selon la revendication 1, caractérisée en ce que la soupape d'arrêt comporte un corps de soupape (22) avec un pointeau de soupape (24) dont le mouvement alternatif peut être commandé pneumatiquement.
  3. Buse à fente selon l'une des revendications 1 ou 2, caractérisée en ce que le canal transversal (18) s'étend orthogonalement au canal d'amenée (34).
  4. Buse à fente selon l'une des revendications 1 à 3, caractérisée en ce que la distance entre la soupape d'arrêt (20) et l'entrée dans la chambre d'étalement (37) est d'au plus 50 mm, et en particulier d'au plus 25 mm.
  5. Buse à fente selon l'une des revendications 1 à 4, caractérisée en ce que le corps de buse (12, 14) comprend plusieurs canaux d'amenée (34) dont les sections droites (36) débouchent à chaque fois dans la chambre d'étalement (37).
  6. Buse à fente selon l'une des revendications 1 à 5, caractérisée en ce que la fente de sortie (38) forme avec le canal d'amenée (34) et respectivement sa section droite (36) un angle de plus de 90° et notamment de l'ordre de 110° à 150°.
  7. Buse à fente selon l'une des revendications 2 à 6, caractérisée en ce que le corps de soupape (20) est inséré dans un passage dans le corps de buse (12, 14), qui communique avec le canal transversal (18).
  8. Buse à fente selon la revendication 7, caractérisée en ce que dans le passage du corps de buse (12, 14) est prévu un siège (32) interchangeable pour le pointeau (24) de la soupape.
  9. Buse à fente selon l'une des revendications 1 à 8, caractérisée en ce que le corps de buse est constitué par deux éléments (12, 14) couplés, entre les surfaces d'appui desquels est conformée la fente de sortie (38).
  10. Buse à fente selon la revendication 9, caractérisée en ce que la fente de sortie (38) est constituée par une fraisure dans l'une des deux surfaces frontales des deux éléments (12, 14) ou par une tôle de masquage.
  11. Buse à fente selon l'une des revendications 9 ou 10, caractérisée en ce que la chambre d'étalement (37) est ménagée dans l'une des surfaces frontales des deux éléments (12, 14).
  12. Buse à fente selon l'une des revendications 9 à 11, caractérisée en ce que le passage pour la soupape d'arrêt (20) et la section (36) qui y fait suite sont disposés dans l'un des deux éléments (12, 14) du corps de buse.
EP89118397A 1988-10-04 1989-10-04 Buse à fente Expired - Lifetime EP0366962B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8812493U DE8812493U1 (de) 1988-10-04 1988-10-04 Schlitzdüse
DE8812493U 1988-10-04

Publications (3)

Publication Number Publication Date
EP0366962A2 EP0366962A2 (fr) 1990-05-09
EP0366962A3 EP0366962A3 (en) 1990-11-14
EP0366962B1 true EP0366962B1 (fr) 1995-03-01

Family

ID=6828548

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89118397A Expired - Lifetime EP0366962B1 (fr) 1988-10-04 1989-10-04 Buse à fente

Country Status (6)

Country Link
US (1) US5056687A (fr)
EP (1) EP0366962B1 (fr)
JP (1) JP2752728B2 (fr)
AT (1) ATE119080T1 (fr)
DE (2) DE8812493U1 (fr)
ES (1) ES2070875T3 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9108543U1 (de) * 1991-07-11 1991-11-14 Nordson Corp., Westlake, Ohio Breitschlitzdüse zum Auftragen von Fluiden, insbesondere von Schmelzklebern
US5376414A (en) * 1993-06-01 1994-12-27 Sophia Systems Co., Ltd. Expansion compensated precision extrusion method
US5622315A (en) * 1995-03-14 1997-04-22 Nordson Corporation Adjustable slot goating die
JP2917127B2 (ja) * 1996-07-12 1999-07-12 井上金属工業株式会社 塗布装置
DE29622341U1 (de) * 1996-12-23 1997-04-03 Nordson Corp., Westlake, Ohio Vorrichtung zum Auftragen von fließfähigem Material auf ein Substrat, insbesondere zum intermittierenden Auftragen von flüssigem Klebstoff
DE19714029C2 (de) * 1997-04-04 1999-06-10 Bargen Rudolf Von Auftragskopf
DE19755625A1 (de) * 1997-12-15 1999-07-01 Jagenberg Papiertech Gmbh Schlitzdüse zum Beschichten von Materialbahnen, insbesondere Papier- oder Kartonbahnen mit Pigmentstreichfarbe
DE19934641C1 (de) * 1999-07-23 2000-10-12 Itw Ind Gmbh Vorrichtung zur dosierten Abgabe von strömenden Medien
DE10232984A1 (de) * 2002-07-19 2004-02-05 Steag Hamatech Ag Düsenanordnung zum Aufbringen einer Flüssigkeit auf ein Substrat
CA2628504C (fr) 2007-04-06 2015-05-26 Ashley Stone Dispositif de coulage

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3126574A (en) * 1964-03-31 Plow type glue gun
US3348520A (en) * 1965-09-16 1967-10-24 Lockwood Tech Applicator system for hot melt adhesive and the like
GB1497661A (en) * 1974-11-02 1978-01-12 Molins Ltd Devices for applying adhesives to a moving web
DE3223999A1 (de) * 1981-07-02 1983-02-10 Dynamelt (1981) Ltd., Daventry Auftragskopf zum aufbringen einer beschichtung auf ein vorbeilaufendes band
US4613078A (en) * 1984-04-09 1986-09-23 Nordson Corporation Quick replaceable nozzle assembly
US4667879A (en) * 1985-08-21 1987-05-26 Nordson Corporation Thermoplastic material applicator having an adjustable slot nozzle
DE3541784C1 (de) * 1985-11-26 1987-05-21 Meltex Verbindungstechnik Gmbh Vorrichtung zum Auftragen von fluessigem Klebstoff,insbesondere von Schmelzklber(hot melt)
US4735169A (en) * 1986-09-03 1988-04-05 Nordson Corporation Adhesive applicator assembly
DE3635481C1 (en) * 1986-10-18 1988-02-11 Dittberner Gmbh Nozzle head for the machine application of glue with a detachably fastened nozzle plate
US4774109A (en) * 1987-07-21 1988-09-27 Nordson Corporation Method and apparatus for applying narrow, closely spaced beads of viscous liquid to a substrate

Also Published As

Publication number Publication date
ES2070875T3 (es) 1995-06-16
ATE119080T1 (de) 1995-03-15
DE58909056D1 (de) 1995-04-06
EP0366962A3 (en) 1990-11-14
DE8812493U1 (de) 1990-02-01
EP0366962A2 (fr) 1990-05-09
US5056687A (en) 1991-10-15
JPH02169065A (ja) 1990-06-29
JP2752728B2 (ja) 1998-05-18

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