EP0403845A2 - Appareil d'enduction - Google Patents

Appareil d'enduction Download PDF

Info

Publication number
EP0403845A2
EP0403845A2 EP90110292A EP90110292A EP0403845A2 EP 0403845 A2 EP0403845 A2 EP 0403845A2 EP 90110292 A EP90110292 A EP 90110292A EP 90110292 A EP90110292 A EP 90110292A EP 0403845 A2 EP0403845 A2 EP 0403845A2
Authority
EP
European Patent Office
Prior art keywords
web
blade
coating
coating liquid
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Withdrawn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
EP90110292A
Other languages
German (de)
English (en)
Other versions
EP0403845A3 (fr
Inventor
Mitsuo C/O Mihara Machinery Works Of Yamamoto
Takehiko C/O Mihara Machinery Works Of Shiromoto
Hiroshi C/O Mihara Machinery Works Of Miura
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.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
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 Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Publication of EP0403845A2 publication Critical patent/EP0403845A2/fr
Publication of EP0403845A3 publication Critical patent/EP0403845A3/fr
Withdrawn legal-status Critical Current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
    • B05C5/0266—Coating heads with slot-shaped outlet adjustable in length, e.g. for coating webs of different width
    • 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
    • B05C11/02—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface
    • B05C11/04—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface with blades
    • B05C11/041—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface with blades characterised by means for positioning, loading, or deforming the blades
    • 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
    • B05C11/02—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface
    • B05C11/04—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface with blades
    • B05C11/047—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface with blades provided with end dams
    • 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
    • B05C3/00—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material
    • B05C3/18—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material only one side of the work coming into contact with the liquid or other fluent material

Definitions

  • the present invention relates to a coating ap­paratus for coating the surface of a sheet of paper, film, metal or the like.
  • Fig. 5 is a section showing a flooded nip type coating ap­paratus of the prior art
  • Fig. 6 is a perspective view for explaining the operations of this coating ap­paratus.
  • a backing roll 2 has its outer circumference covered with a resilient member 1 such as rubber.
  • a web 3 is made to run on the outer cir­cumference of the resilient member 1.
  • a blade 7 is disposed down­stream of the applicator roll 9 in the feeding direc­tion of the web for removing the excess coating liquid 4 to form a constant coating liquid layer 6 over the surface of the web 3.
  • reference numeral 8 designates a holder for the blade 7.
  • the coating liquid 4 becomes so ir­regular depending upon its properties that ring pat­terns 11 and splashes 5 caused by the centrifugal force are overlapped, as shown in Fig. 6.
  • the thickness and the thickness of penetration of the coating liquid layer 6 are influenced by the irregularities.
  • the "wet streak" in which the coating irregularities have a pitch of 5 to 10 mm.
  • a coating apparatus comprising: a web for con­tinuously running to apply a coating liquid; and a blade for scraping off the excess of the coating liq­uid to form a coating liquid layer, wherein the im­provement comprises: a slot formed with an exit having a width matching that of said web for spraying said coating liquid from said exit to apply the same to said web; a premetering blade disposed downstream of said slot and upstream of said blade in the running direction of said web for controlling the amount of said coating liquid applied to said web with its sur­face pressure; and a pressure tube mounted along the widthwise direction of said premetering blade for ap­plying said surface pressure to said premetering blade.
  • the applicator roll for applying the coat­ing liquid to the web is omitted from the coating ap­paratus of the prior art and is replaced by the slot for spraying the coating liquid to the web, and the amount of the coating liquid thus applied is con­trolled with the surface of the pressure of the pre­metering blade.
  • the coating liquid is forced to over­flow to the atmosphere side with the liquid pressure which is established upstream of the premetering blade so that the air, which has been entrained by the web into the coating liquid, is discharged to form the coating liquid layer of the coating liquid having no skip.
  • the amount of the coating liquid to be ap­plied to the web with the surface pressure of the premetering blade is controlled by the combination of the premetering blade and the pressure tube so that a uniform and flat coating liquid surface can be formed all over the width of the web.
  • Fig. 1 is a section showing the coating apparatus according to one embodiment of the present invention
  • Fig. 2 shows the essential portion of the same in de­tail
  • Fig. 3 shows in detail an essential portion of the coating apparatus according to another embodiment of the present invention
  • Fig. 4 is a diagram for explaining the operations of those embodiments.
  • the coating apparatus accord­ing to the present embodiment is equipped with a noz­zle supply head 20 for applying a coating liquid 4 to the paper of a web 3, and a side sealing mechanism 30 for changing the coating width of the coating liquid 4 in accordance with the width of the web 3.
  • the arrange­ment of the coating apparatus of the prior art for scooping and transferring the coating liquid with the applicator roll is replaced by an arrangement for spraying the coating liquid 4 with the nozzle supply head 20.
  • the coating liquid 4 is supplied to the supply head 20 from both the operation and drive sides of the present coating apparatus and is intro­duced through a slot 41, which is used for spraying the coating liquid 4 uniformly in the widthwise direc­tion of the web 3, into a liquid reservoir which is defined by a backing roll 2, a premetering blade 13, the side sealing mechanism 30 and an entrance side lip 17.
  • the premetering blade 13 is extended in the widthwise direction of the web 3 and is clamped by a clamping tube 15 which is formed at the edge of an exit side lip 16.
  • a pressure tube 14 which is extended in the widthwise of the premetering blade 13 for applying a surface pressure to the premetaling blade 13 to control the amount of the applied coating liquid 4 with the edge of the pre­metering blade 13.
  • the entrance side lip 17 is equipped with an easily deformable con­striction 18 and a set-screw 24 for adjusting the pro­file of the flow rate of the coating liquid 4 passing through the slot 41.
  • a gap of several millimeters im­portant for determining the liquid pressure in the liquid reservoir is formed between the backing roll 2 and the edge of the entrance side lip 17, so that the coating liquid 4 entraining the air is forced to over­flow from the gap until it is collected for recycles by a recovery pan 19.
  • a trisected jacket 12 which is filled with cooling water to condense the water on the outer face of the jacket 12, so that the coating liq­uid 4 overflowing along a guide plate 23 may not be stick on the jacket 12.
  • the coating width of the coating liquid 4 has to be correspondingly changed.
  • the side sealing mechanism 30 there is provide the side sealing mechanism 30. Specifically, the change of the coating width is performed by push­ing or pulling a guide rod 31. A side seal is mounted on a holder 32 which is connected directly to the guide rod 31, and a fitting 35 connected to a hose 33 for the water supply is mounted in a pad 36. The water is supplied at a constant rate to perform the liq­uid seal from a labyrinth groove which is formed provided on the upper surface of the side seal 34.
  • this labyrinth groove may be replaced for the liquid seal by a thin metal shim 43 which is disposed over the side seal 34, as shown in Fig. 3.
  • a guide rod 44 is attached to that shim 43 so that the shim 43 can be slid to change the coating width by controlling the guide rod 44.
  • the entrance side lip 17 is formed with liquid relief grooves 42 at the operation and drive sides out­side of the side seal 34, to collect the coating liq­uid 4 having leaked from the side seal 34 into the recovery pan 19.
  • a fixture 37 is provided to regulate the bulging of the pressure tube 14, and a cushion member 38 is attached to the fixture 37 so that the premetering blade 13 outside of the side seal 34 may not be excessively pushed to the backing roll 2.
  • Those fitting 35, pad 36 and fixture 37 are made in­tegral, and the side seal 34 is clamped from its two sides by the pad 36 to receive the pipe of the fitting 35.
  • numeral 7 designates a blade dis­posed downstream of the premetering blade 13 for scraping down the excessive coating liquid from the web 3
  • numeral 8 designates a holder for the blade 7.
  • the supply head 20 is equip­ped with mechanisms for mounting and demounting the same to insert the web 3 and for turning the supply head 20 to replace the premetering blade 13 or to in­spect the slot 41.
  • the shape of the supply head 20, the structure of the side sealing mechanism 30, and the structures of the exit side lip 16 and the entrance side lip 17 should not be limited to those of the embodiments thus far described.
  • the air entrained by the web 3 into the coating liquid 4 is discharged to the atmosphere by forcing the coating liquid 4 to overflow in the liquid reservoir just upstream of the premetering blade 13, so that the coating liquid layer 6 is formed of the coating liquid 4 without any skip. Moreover, a uni­form and flat coating liquid face is obtained all over the width of the web 3 by combining the premetering blade 13 and the pressure tube 14 to bring the edge of the premetering blade 13 into abutment against the surface of the backing roll 2.
  • the coating apparatus of the prior art is limited in the thickness of the coating liquid layer by 150 microns at a coating speed as high as 800 m/min, the film thickness can be increased to 200 or 350 microns for a constant supply of the coating liquid 4 by ap­plying the pressure of the pressure tube 14, and the penetration power of the coating liquid 4 into the paper of the web 3 can be controlled within the range of the film thickness.
  • the premetering blade 13 flexible, moreover, the deformation of the backing roll 2 and the supply head 20 can be absorbed even if they are deformed as a result of thermal expansions.
  • the coating liquid layer has no skip but is uniform and flat all over the width of the web.
  • the coating irregularities called the "wet streak” can be elimi­nated even at a coating speed as high as about 800 m/min or more.

Landscapes

  • Coating Apparatus (AREA)
EP19900110292 1989-06-20 1990-05-30 Appareil d'enduction Withdrawn EP0403845A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP71241/89U 1989-06-20
JP1989071241U JPH0647586Y2 (ja) 1989-06-20 1989-06-20 塗工装置

Publications (2)

Publication Number Publication Date
EP0403845A2 true EP0403845A2 (fr) 1990-12-27
EP0403845A3 EP0403845A3 (fr) 1991-12-18

Family

ID=13455007

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900110292 Withdrawn EP0403845A3 (fr) 1989-06-20 1990-05-30 Appareil d'enduction

Country Status (3)

Country Link
EP (1) EP0403845A3 (fr)
JP (1) JPH0647586Y2 (fr)
FI (1) FI902664A0 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4224726A1 (de) * 1992-07-27 1994-02-03 Voith Gmbh J M Streicheinrichtung mit zwischen einer Auftragswalze und einer Gegenwalze gebildetem Auftragsspalt
US5409534A (en) * 1992-05-12 1995-04-25 J. M. Voith Gmbh Device for coating moving webs of paper or board
US5681618A (en) * 1989-07-03 1997-10-28 Consolidated Papers, Inc. Method for applying coating to paper web including successive doctoring steps
EP2149399A1 (fr) 2008-07-31 2010-02-03 CO.ME.CART. Costruzioni Meccaniche Cartiere S.p.A. Tête d'application
CN108382052A (zh) * 2018-03-16 2018-08-10 江苏金峰轻工装备有限公司 一种面料复合机贴合剂涂抹转筒
CN111804518A (zh) * 2020-07-24 2020-10-23 南京湶膜科技有限公司 一种膜元件涂胶装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2924105B1 (fr) * 2007-11-23 2009-12-04 Armor Inox Sa Unite empilable

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2133322A (en) * 1983-01-17 1984-07-25 Cons Paper Inc Web coasting apparatus
US4665859A (en) * 1985-12-11 1987-05-19 Thermo Electron-Web Systems, Inc. Finger-type doctor blade holder

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI71081C (fi) * 1984-05-11 1986-11-24 Waertsilae Oy Ab Bestrykningsanordning
DE3420412C2 (de) * 1984-06-01 1995-08-10 Voith Gmbh J M Streicheinrichtung zur Beschichtung laufender Warenbahnen

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2133322A (en) * 1983-01-17 1984-07-25 Cons Paper Inc Web coasting apparatus
US4665859A (en) * 1985-12-11 1987-05-19 Thermo Electron-Web Systems, Inc. Finger-type doctor blade holder

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5681618A (en) * 1989-07-03 1997-10-28 Consolidated Papers, Inc. Method for applying coating to paper web including successive doctoring steps
US5409534A (en) * 1992-05-12 1995-04-25 J. M. Voith Gmbh Device for coating moving webs of paper or board
DE4224726A1 (de) * 1992-07-27 1994-02-03 Voith Gmbh J M Streicheinrichtung mit zwischen einer Auftragswalze und einer Gegenwalze gebildetem Auftragsspalt
EP2149399A1 (fr) 2008-07-31 2010-02-03 CO.ME.CART. Costruzioni Meccaniche Cartiere S.p.A. Tête d'application
CN108382052A (zh) * 2018-03-16 2018-08-10 江苏金峰轻工装备有限公司 一种面料复合机贴合剂涂抹转筒
CN111804518A (zh) * 2020-07-24 2020-10-23 南京湶膜科技有限公司 一种膜元件涂胶装置
CN111804518B (zh) * 2020-07-24 2022-05-27 南京湶膜科技有限公司 一种膜元件涂胶装置

Also Published As

Publication number Publication date
EP0403845A3 (fr) 1991-12-18
FI902664A0 (fi) 1990-05-29
JPH0647586Y2 (ja) 1994-12-07
JPH0311466U (fr) 1991-02-05

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