EP0678338A1 - Vorrichtung zur Beschichtung von Bahnmaterial - Google Patents

Vorrichtung zur Beschichtung von Bahnmaterial Download PDF

Info

Publication number
EP0678338A1
EP0678338A1 EP95201006A EP95201006A EP0678338A1 EP 0678338 A1 EP0678338 A1 EP 0678338A1 EP 95201006 A EP95201006 A EP 95201006A EP 95201006 A EP95201006 A EP 95201006A EP 0678338 A1 EP0678338 A1 EP 0678338A1
Authority
EP
European Patent Office
Prior art keywords
roll
application roll
substrate web
counterpressure
application
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Withdrawn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
EP95201006A
Other languages
English (en)
French (fr)
Inventor
Gilbert Foster
Carolus Josephus A. M. Schrauwers
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.)
Stork Brabant BV
Original Assignee
Stork X Cel BV
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 Stork X Cel BV filed Critical Stork X Cel BV
Publication of EP0678338A1 publication Critical patent/EP0678338A1/de
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
    • D21H23/22—Addition to the formed paper
    • D21H23/52—Addition to the formed paper by contacting paper with a device carrying the material
    • D21H23/56—Rolls
    • D21H23/58—Details thereof, e.g. surface characteristics, peripheral speed
    • D21H23/62—Reverse roll coating, i.e. applicator roll surface moving in direction opposite to that of the paper
    • 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
    • B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
    • B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
    • B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
    • B05C1/0826—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line the work being a web or sheets
    • B05C1/0834—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line the work being a web or sheets the coating roller co-operating with other rollers, e.g. dosing, transfer rollers

Definitions

  • the invention relates to a device for applying a coating layer to a substrate web, comprising an application roll for applying the coating layer to the substrate web, a counterpressure roll interacting with the application roll in order to support a substrate web passing through between the application roll and the counterpressure roll, and a metering device for applying a coating material in a layer to the application roll, the application roll being designed to rotate in the same direction as the counterpressure roll, so that at the position of the counterpressure roll the direction of movement of the periphery of the application roll is opposite to that of the counterpressure roll.
  • Such devices are known and are called reverse-roll coaters. Two types of devices can be distinguished here, depending on the type of metering device which is used.
  • the metering device In the case of the first type the metering device consists of a metering roll which interacts with the application roll. The metering roll runs through a bath of the coating material and takes up this material in the process. The material taken up is then transferred to the application roll.
  • This type of device is suitable in particular for applying coating materials of relatively low viscosity.
  • the disadvantage of the device is that the quantity of coating material taken up from the bath cannot be regulated well. Additional measures are necessary to regulate the quantity of coating material on the application roll, for example using a scraper knife.
  • the metering device also consists of a metering roll interacting with the application roll. Said metering device is situated a short distance away from the application roll.
  • the relatively highly viscous coating material lies in the channel formed by the metering roll and application roll, and is taken up through the gap between the application roll and the metering roll.
  • the disadvantage of this type of device is that the quantity of coating material on the application roll depends on the distance between the metering roll and the application roll. When substrate webs of great width (for example, 3 to 4 metres) are being coated, the accuracy and the stability of the metering roll and application roll need to be high over the full width in order to obtain a uniform thickness of coating layer.
  • the object of the invention is to provide a device for the application of a coating layer to a substrate web, in which the disadvantages of the known devices are overcome.
  • the metering device comprises a rotating cylindrical screen and supply means for supplying the coating material.
  • the device according to the invention it is possible to regulate the thickness of the coating layer within very narrow limits, so that very low layer thicknesses, corresponding to a quantity of coating material of 5 - 6 grammes per m2 can be achieved.
  • the thickness of the coating layer can be regulated easily by the choice of type of screen and the speed of the application roll relative to the counterpressure roll.
  • Fig. 1 shows diagrammatically the layout of a device for applying the coating layer to a substrate web.
  • the substrate web is indicated by the reference number 1 and the coating layer by the reference number 2.
  • the device comprises an application roll 3 for applying the coating layer 2 to the substrate web 1, a counterpressure roll 4 interacting with the application roll 3 in order to support the substrate web 1 passing through between the application roll 3 and the counterpressure roll 4, and also a metering device 5 for applying the coating material in a layer 6 to the application roll 3.
  • the metering device 5 consists of a rotating cylindrical screen 7 and a squeegee 8, preferably of the closed type, disposed inside the screen.
  • a squeegee 8 preferably of the closed type, disposed inside the screen.
  • other types of squeegees such as open-type squeegees, roller squeegees etc., can also be used.
  • the device operates as follows.
  • the coating material 9 is supplied through the inside of the squeegee 8.
  • the coating material 9 flows through a gap 10, extending in the lengthwise direction of the squeegee 8, into the inside of the cylindrical screen 7.
  • the screen 7 rotates in the direction of the arrow 11.
  • the coating material is forced through the screen and thus applied in a layer 6 to the outside of the application roll 3, which rotates in the direction of the arrow 13.
  • the free edge of the squeegee blade 12 preferably lies in the plane through the axis of the rotating screen 7 and the axis 14 of the application roll 3. Very good metering of the coating material can be achieved in this way.
  • the coating material is then applied by the application roll 3 to the substrate web 1, which is passed around the counterpressure roll 4 and runs through between the application roll 3 and the counterpressure roll 4 in the direction of the arrows 15.
  • Such a type of device is therefore often known as a reverse-roll coater.
  • the application roll 3, at least at the periphery, is made of a shape-retaining (hard) material, i.e. a material which is shape-retaining under the loads occurring upon the roll.
  • the shape-retaining material used is, for example, metal or ceramic material.
  • the counterpressure roll 4 at least at the periphery, is made of a resilient material, i.e. a material which can eliminate slight unevennesses in the substrate web to be coated and slight deviations in the parallelism of the application roll 3 and the counterpressure roll 4. Moreover, the coefficient of friction of the resilient material of the counterpressure roll 4 should be greater than that of the shape-retaining material of the application roll 3, so that the substrate web to be coated is conveyed through the counterpressure roll 4.
  • the resilient material used is, for example, rubber.
  • the gap between the application roll 3 and the counterpressure roll 4 is preferably slightly smaller than the thickness of the substrate web to be coated.
  • the thickness of the coating layer 2 can be regulated by means of three parameters: the type of screen (mesh, thickness and open area) , the squeegee pressure and the speed of the application roll 3 relative to the counterpressure roll 4, and thus the substrate web 1.
  • a low weight of coating material can be applied to the application roll 3 by selecting a screen with a high mesh number (many holes), in conjunction with a low wall thickness and a relatively small open area. The reverse applies to a screen with a low mesh number (fewer holes), a greater wall thickness and a large open area.
  • the squeegee pressure i.e. the pressure of the squeegee blade 12 against the screen 7 also plays a role.
  • the thickness of the coating layer 2 can also be regulated by regulating the speed of the application roll 3 relative to the speed of the substrate web 1. The higher the speed of the application roll 3 relative to the speed of the substrate web 1, the thicker will be the coating layer 2.
  • the device according to the invention can also be used more generally, for example for direct screen printing and indirect screen printing.
  • the substrate web 1 is passed through between the rotating screen 7 and the application roll 3, as shown diagrammatically in Fig. 2, and a pattern is printed on the substrate web.
  • the diameter of the cylindrical screen 7 is preferably the same as the diameter of the application roll 3, and provision is made for drive means by which the cylindrical screen 7 and the application roll 3 can be driven in such a way that they rotate at the same peripheral speed, but in opposite directions of rotation.
  • the device according to the invention is therefore such that it can be used for several purposes, possibly with minor adjustments.

Landscapes

  • Coating Apparatus (AREA)
EP95201006A 1994-04-22 1995-04-20 Vorrichtung zur Beschichtung von Bahnmaterial Withdrawn EP0678338A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL9400646A NL9400646A (nl) 1994-04-22 1994-04-22 Inrichting voor het aanbrengen van een bekledingslaag op een substraatbaan.
NL9400646 1994-04-22

Publications (1)

Publication Number Publication Date
EP0678338A1 true EP0678338A1 (de) 1995-10-25

Family

ID=19864099

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95201006A Withdrawn EP0678338A1 (de) 1994-04-22 1995-04-20 Vorrichtung zur Beschichtung von Bahnmaterial

Country Status (3)

Country Link
EP (1) EP0678338A1 (de)
JP (1) JPH07299400A (de)
NL (1) NL9400646A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114775963A (zh) * 2022-05-25 2022-07-22 深圳市卓宝科技股份有限公司 一种防水涂料施工方法和实施该方法的铺设装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3511696A (en) * 1966-06-16 1970-05-12 Stauffer Chem Co Of Canada Ltd Reverse roll coating process and apparatus
EP0095819A2 (de) * 1982-06-02 1983-12-07 Stork Brabant B.V. Druckapparat, insbesondere für das Aufbringen von Lack

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3511696A (en) * 1966-06-16 1970-05-12 Stauffer Chem Co Of Canada Ltd Reverse roll coating process and apparatus
EP0095819A2 (de) * 1982-06-02 1983-12-07 Stork Brabant B.V. Druckapparat, insbesondere für das Aufbringen von Lack

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114775963A (zh) * 2022-05-25 2022-07-22 深圳市卓宝科技股份有限公司 一种防水涂料施工方法和实施该方法的铺设装置

Also Published As

Publication number Publication date
JPH07299400A (ja) 1995-11-14
NL9400646A (nl) 1995-12-01

Similar Documents

Publication Publication Date Title
US4442144A (en) Method for forming a coating on a substrate
US4357370A (en) Twin short dwell coater arrangement
EP0003790B1 (de) Vorrichtung zum Beschichten einer sich bewegenden Bahn
KR970020215A (ko) 재료 표면에 점성 액체를 도포하기 위한 장치 및 방법
US4822640A (en) Coater
US3511696A (en) Reverse roll coating process and apparatus
US3951102A (en) Roller coating apparatus
GB2046133A (en) Apparatus for applying foam to a moving web
US4347269A (en) Method of and apparatus for applying a coating to a web of sheet material
US5795386A (en) Apparatus for applying a coating layer to a substrate web
JP2889128B2 (ja) 塗布方法及びその装置
CA1247469A (en) Carpet coating method and apparatus
FI66448C (fi) Belaeggningsanordning foer bana
JP3010068B2 (ja) コーティング方法
GB2171934A (en) Two-sided coating of paper webs
GB1571946A (en) Process and device for coating a film
US2534321A (en) Coating method and apparatus
US4363288A (en) Device for applying a coating layer to a strip of continuously moving material
EP0848110B1 (de) Auftragskopf mit Formung der Klinge
US5738724A (en) Actuator assembly for coater blade load adjustment
US6444270B1 (en) Photo film coating method for coating web-shaped base material
US5782976A (en) Continuous coater blade
JPH10244191A (ja) 接着剤塗布装置
JP2584923Y2 (ja) 塗工装置
NL9400646A (nl) Inrichting voor het aanbrengen van een bekledingslaag op een substraatbaan.

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

Kind code of ref document: A1

Designated state(s): DE FR GB IT NL

17P Request for examination filed

Effective date: 19960425

17Q First examination report despatched

Effective date: 19980527

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: STORK BRABANT B.V.

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

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

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20000321