EP1319446A2 - Saugdüse - Google Patents

Saugdüse Download PDF

Info

Publication number
EP1319446A2
EP1319446A2 EP20020258620 EP02258620A EP1319446A2 EP 1319446 A2 EP1319446 A2 EP 1319446A2 EP 20020258620 EP20020258620 EP 20020258620 EP 02258620 A EP02258620 A EP 02258620A EP 1319446 A2 EP1319446 A2 EP 1319446A2
Authority
EP
European Patent Office
Prior art keywords
nozzle
coating
substrate
suction nozzle
cleaning liquid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP20020258620
Other languages
English (en)
French (fr)
Inventor
Markus Gueggi
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.)
Dow Global Technologies LLC
Original Assignee
Dow Global Technologies LLC
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 Dow Global Technologies LLC filed Critical Dow Global Technologies LLC
Publication of EP1319446A2 publication Critical patent/EP1319446A2/de
Withdrawn legal-status Critical Current

Links

Images

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
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
    • B05C11/1039—Recovery of excess liquid or other fluent material; Controlling means therefor
    • 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
    • B05C5/005—Curtain coaters

Definitions

  • the present invention relates to a suction nozzle and method for removing lateral edge bead portions of a coated layer of a continuously moving substrate with one or more simultaneously applied layers of liquid coating materials, and, more particularly to a suction nozzle and a method for removing said lateral edge bead portions under very high velocity from the substrate.
  • curtain coating methods and apparatus are widely known and used.
  • a continuous web or sheets are continuously moved below a coating hopper.
  • One or more liquid compositions are provided from a hopper arrangement in the form of a liquid curtain.
  • liquid compositions are used of relatively low viscosity, generally less than about 150 cP (centipoise), most in the range from about 5 to about 100 cP.
  • the coated layer often has a tendency to rise along both lateral edges of the web to form edge bead portions due to the surface tension of the coating composition.
  • a further problem is that the edges may be luted which leads to problems in use of the coated substrate.
  • the coated layer can not be dried uniformly at the edge bead portions. Therefore, the edge bead portions should be removed before drying of the substrate.
  • a suction nozzle and a method for applying a coating composition to an elongated flexible web which is continuously moving wherein the suction nozzle has a dual pipe structure with a cleaning liquid jetting outlet and a liquid sucking inlet at its end, in which the jetting nozzle is offset from the longitudinal axis of the nozzle and forms an angle of 30 degrees to 85 degrees with respect to the longitudinal axis of the nozzle, and the sucking inlet is positioned on the longitudinal axis.
  • angles smaller than 30 degrees lead to the liquid flowing to the rear side of the substrate and an angle larger than 90 degrees leads to the sucking inlet not being sufficiently cleaned.
  • the removal of rising coated layer at the edge bead portions of the moving web may be improved which apparently allows a better coating quality of the moving web.
  • a suction nozzle in which a means to get a longer distance of acceleration is provided.
  • the problems are also solved by providing a method for removing lateral edge bead portions of a coated layer of a higher speed continuously moving substrate like a paper web by sucking air into the nozzle opening over a long accelerating way wherein a substrate is moved below a hopper arrangement providing one or more liquid coating materials in the form of a free-falling curtain impinging the substrate at a dynamic wetting line, wherein the dynamic wetting line of the coating curtain on the substrate or web is oriented generally perpendicular to the moving direction of the substrate or web.
  • the nozzle is able to thoroughly remove the elevated coated layer at edge bead portions at the high speed of the moving substrate.
  • the nozzle end in the area of its opening is provided such that ingressing air is accelerated in speed.
  • the end is relatively flat to elongate the distance of acceleration.
  • the air ingress angle relative to the plane of the substrate to be coated is small, especially smaller than 30 degrees, more preferably smaller than 20 degrees, most preferably between 0 and about 10 degrees.
  • the moving speed of the substrate is above 1000 m/min, preferably in a range of about 20 m/s to about 40 m/s.
  • the air speed at air inlet for ingressing air of suction or vacuum means or suction nozzle exceeds double the speed value of the moving substrate, most preferred about 200 m/s to about 250 m/s.
  • the nozzle comprises an inlet for scavenging fluid or cleaning liquids running through the nozzle opening.
  • the scavenging or cleaning liquids are supplied from a cleaning liquid supply support through a conduit in the nozzle.
  • the outlet for that cleaning liquid runs around the nozzle opening, preferably inside the nozzle opening.
  • the gap to supply the cleaning liquid in the area of the nozzle opening measures preferably 0.5 mm, more preferably 0.2 mm. It is preferred to have a small gap to diffuse the cleaning liquid over the whole edge bead portions.
  • the cleaning liquid is supplied at 250 ml/min or 151/h.
  • the suction nozzle comprises a pressure gauging means in a vacuum line to control the amount of vacuum supplied.
  • a suction nozzle according to the invention is preferably provided with a ring which may preferably be adapted to permit a free flow of ingressing air and detaching coating material.
  • Figure 1 shows a suction nozzle arrangement over a substrate having coated layer risen along both lateral edges of the substrate or web formed as edge bead portions as known from the prior art.
  • a conventional suction nozzle 10 is of a dual part structure having a liquid jetting outlet 12 and a cleaning liquid suction inlet 14 at the end.
  • the jetting outlet 12 is offset of the longitudinal axis 16 of the nozzle.
  • the sucking inlet 14 is located on this axis.
  • a cleaning solution supply port 18 to which water or solvent is supplied.
  • the cleaning solution runs through a groove 20, which is straight.
  • the angle between the jetting outlet 12 and the longitudinal axis of the nozzle which is the angle ⁇ in figure 1 may be in the prior art in the range of 30 to 85 degrees.
  • the nozzle is moved along an edge bead portion 22 of the coated layer 24 provided on the substrate or web 26.
  • an evacuating port 28 which is connected to a vacuum pump, not shown in figure 1, the lateral edge bead portions are removed after dilution together with the cleaning liquid from the coated layer.
  • the cleaning liquid runs, for the purpose of this application, downstream the nozzle and the removed lateral edge bead portions together with the cleaning liquid from the coated layer run upstream for the purpose of this application.
  • a suction nozzle or vacuum means according to the present invention is shown in a partly cross sectional view in figure 2. Parts being the same or similar to those described above depicted by the same reference number for the ease of understanding.
  • the cleaning liquid supply port 18 is continued into the nozzle body 30.
  • a liquid supply line 32 is provided essentially perpendicular to the cleaning liquid supply port 18 and is provided as a groove in the front part 34 of the nozzle.
  • the front part 34 to the nozzle comprises an inner and an outer part 36, 38, where the inner part is spaced a distance from the outer part in the end area of the front part of the nozzle.
  • the gap is formed as a ring and ends in the cleaning liquid jetting outlet 12. It is provided surrounding the cleaning liquid sucking inlet 14 at the end of the nozzle.
  • the gap g preferably measures about 0.5 to 0.2 mm.
  • the angle ⁇ between the outer surface of the opening end of the nozzle and the surface of the coated substrate is small and may be in the range of 30 degrees, preferably 20 degrees, more preferably 0 to about 10 degrees.
  • removal of edge bead portions is possible with very high speeds of moving substrate 26 in the curtain coating process.
  • the drawbacks of luted edges covered with rising coated layer may be overcome.
  • the cleaning liquid jetting outlet 12 surrounding the cleaning liquid sucking inlet 14 at the inside of the nozzle the nozzle maintains clean at all times such that the coating compositions will not solidify or accumulate inside the nozzle such that the nozzle may be operated for long periods of time.
  • the flow through the passageway 40 running through the nozzle and the evacuating port 28 may be controlled by a filler ring 42 surrounding the passage way inside the nozzle body 30. Accordingly, free flow is possible.
  • the flow is initiated by a vacuum pump or the like connected to a vacuum port 44.
  • a port 46 for connecting a vacuum gauge is also provided.
  • the port 46 is provided in the nozzle body 30.
  • the nozzle body 30 is essentially block-like and screwed together with the front part 34 of the nozzle as schematically shown in figure 3.
  • the nozzle body is assembled by two parts one of which, 48, may be screwed to the other having a recess where the front part of the nozzle 34 is inserted and held in place.

Landscapes

  • Coating Apparatus (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
EP20020258620 2001-12-13 2002-12-13 Saugdüse Withdrawn EP1319446A2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US34054801P 2001-12-13 2001-12-13
US340548P 2001-12-13

Publications (1)

Publication Number Publication Date
EP1319446A2 true EP1319446A2 (de) 2003-06-18

Family

ID=23333863

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20020258620 Withdrawn EP1319446A2 (de) 2001-12-13 2002-12-13 Saugdüse

Country Status (1)

Country Link
EP (1) EP1319446A2 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103406230A (zh) * 2013-08-08 2013-11-27 厦门精恒新自动化科技有限公司 一种点胶清洗切换装置
NL2019096B1 (en) * 2017-06-20 2018-12-27 Suss Microtec Lithography Gmbh Nozzle tip adapter, nozzle assembly as well as nozzle

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0139211A2 (de) 1983-09-12 1985-05-02 Fuji Photo Film Co., Ltd. Saugdüse

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0139211A2 (de) 1983-09-12 1985-05-02 Fuji Photo Film Co., Ltd. Saugdüse

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103406230A (zh) * 2013-08-08 2013-11-27 厦门精恒新自动化科技有限公司 一种点胶清洗切换装置
CN103406230B (zh) * 2013-08-08 2015-11-25 厦门精恒新自动化科技有限公司 一种点胶清洗切换装置
NL2019096B1 (en) * 2017-06-20 2018-12-27 Suss Microtec Lithography Gmbh Nozzle tip adapter, nozzle assembly as well as nozzle
US10953415B2 (en) 2017-06-20 2021-03-23 Suss Microtec Lithography Gmbh Nozzle tip adapter, nozzle assembly as well as nozzle
AT520099A3 (de) * 2017-06-20 2023-04-15 Suss Microtec Lithography Gmbh Düsenspitzenadapter, Düsenanordnung sowie Düse
AT520099B1 (de) * 2017-06-20 2023-07-15 Suss Microtec Lithography Gmbh Düsenspitzenadapter, Düsenanordnung sowie Düse

Similar Documents

Publication Publication Date Title
AU616009B2 (en) Curtain coating method and apparatus
US4611553A (en) Suction nozzle
JP3676182B2 (ja) 塗工装置および塗工方法
EP0804292B1 (de) Verfahren und vorrichtung zur beschichtung von substraten durch verwendung eines luftmessers
AU2002330387B2 (en) Liquid spray unit, method for spraying liquid using it, and chemical
JP4846629B2 (ja) カーテン塗布装置及びカーテン塗布方法
US7169445B2 (en) Method and apparatus for curtain coating
CA2469292A1 (en) Method and apparatus for curtain coating
WO2011024636A1 (ja) カーテンコータのエッジガイド
AU626316B2 (en) Curtain coating method and apparatus
KR100280185B1 (ko) 분사 피복방법 및 장치
CA1110843A (en) Vacuum coating box
JPH06510701A (ja) コーティング装置
EP1319446A2 (de) Saugdüse
FI68536B (fi) Luftknivsbestrykare
JP5228227B2 (ja) カーテンコータのエッジガイド
JP3631367B2 (ja) カーテン塗布方法およびその装置
JP4619161B2 (ja) 塗布装置
JPH0248069A (ja) 塗装装置
JP2002066430A (ja) 塗布液吸引装置
JPS6028851A (ja) 塗布方法及びその装置
FI81639B (fi) Foerfarande och anordning foer belaeggning av materialbana.
JPH0622471Y2 (ja) 塗工装置
JPH03502903A (ja) 流し塗方法及び装置
JPH04131160A (ja) 塗布幅規制方法

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SI SK TR

AX Request for extension of the european patent

Extension state: AL LT LV MK RO

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Effective date: 20030721