EP0195276A1 - Déflecteur pour matériau de revêtement visqueux s'écoulant librement en forme de lamelle - Google Patents

Déflecteur pour matériau de revêtement visqueux s'écoulant librement en forme de lamelle Download PDF

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Publication number
EP0195276A1
EP0195276A1 EP86102305A EP86102305A EP0195276A1 EP 0195276 A1 EP0195276 A1 EP 0195276A1 EP 86102305 A EP86102305 A EP 86102305A EP 86102305 A EP86102305 A EP 86102305A EP 0195276 A1 EP0195276 A1 EP 0195276A1
Authority
EP
European Patent Office
Prior art keywords
electrode
coating material
lamella
deflection
deflection device
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.)
Granted
Application number
EP86102305A
Other languages
German (de)
English (en)
Other versions
EP0195276B1 (fr
Inventor
Walter Spengler
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.)
SPENGLER ELECTRONIC AG;WOHLFAHRTSSTIFTUNG DER SPEN
Original Assignee
Walter Spengler
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 Walter Spengler filed Critical Walter Spengler
Priority to AT86102305T priority Critical patent/ATE34928T1/de
Publication of EP0195276A1 publication Critical patent/EP0195276A1/fr
Application granted granted Critical
Publication of EP0195276B1 publication Critical patent/EP0195276B1/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
    • B05C5/002—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the work consisting of separate articles
    • B05C5/004—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the work consisting of separate articles the work consisting of separate rectangular flat articles, e.g. flat sheets
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S118/00—Coating apparatus
    • Y10S118/04—Curtain coater

Definitions

  • the present invention relates to a deflection device for lamellar free-flowing viscous coating material. According to the preamble of claim 1.
  • the plates are fed to a processing station on a horizontal transport path, for example a conveyor belt, in which they are moved under a pouring head which emits the viscous coating material in the form of a thickness-calibrated liquid lamella.
  • a processing station on a horizontal transport path, for example a conveyor belt, in which they are moved under a pouring head which emits the viscous coating material in the form of a thickness-calibrated liquid lamella.
  • a processing station on a horizontal transport path, for example a conveyor belt, in which they are moved under a pouring head which emits the viscous coating material in the form of a thickness-calibrated liquid lamella.
  • a processing station on a horizontal transport path, for example a conveyor belt, in which they are moved under a pouring head which emits the viscous coating material in the form of a thickness-calibrated liquid lamella.
  • Such a machine is designed for continuous operation, with the liquid lamella underneath flows practically vertically downwards in the
  • the plates which are preferably 10 - 40 mm thick, are provided with run-on and run-off surfaces perpendicular to the surface of the plate and pass under the casting head at a speed of approximately 50 m / min, there is a risk that the coating material lamella of approx. 3/100 mm to approx. 6/100 mm thick begins to oscillate or flutter due to the pressure of the air stowed on the plate on the upstream side and the downward vacuum. Due to the instability, mainly due to the build-up of air dust, a wavy cross-sectional shape is created on the coating material lamella, which results in surface irregularities in the coating in the starting area of the plate. Since a smoothing operation on the still liquid coating material is almost impossible, must.
  • the suction effect on the back of the plate has the effect that the lamella is sucked into the plate edge and torn off immediately below the edge when the plate continues to run. It can be assumed that by separating the lamella below the plate edge, the lamella course remains stable and the leading edge of the following plate runs against a flat lamella surface.
  • the object of the invention is therefore to propose a deflection device for lamellar free-flowing viscous coating material with which the above-mentioned problem can be reliably solved in a simple manner.
  • the paint casting machine shown schematically in FIG. 1 contains within a machine frame 1 a delivery-side (first) conveyor arrangement 2, and an outlet-side (second) conveyor arrangement 3, which is represented by a so-called pouring gap 4 from are separated from each other.
  • the conveyor arrangements 2 and 3 are preferably longitudinally structured, synchronous conveyor belts which ensure that the substrates 5.1, 5.2 and 5.3 to be coated are guided in a stable manner by the machine.
  • the minimum width of the casting gap 4 by both the length of the substrates 5.1, 5.2, etc. as well as by the design and operation of a general mi 'c, where 6 coating assembly called and mutual approach or removal of the conveyor assemblies 2, 3 narrow or designed.
  • the coating arrangement 6 essentially consists of a schematically shown casting head 7, a deflection device 9 according to the invention for a coating material lamella 10.1, and a collecting device 8 for coating material not applied to substrates 5.1, 5.2 etc.
  • the casting head 7 of a known embodiment essentially comprises a storage container 7.1 for receiving liquid single or multi-component coating starting material 10 with a high dielectric constant and an elongated flat nozzle 11 on the bottom of the storage container 7.1.
  • the length dimension of their casting lips 11.1 is matched to the coating width on the substrates 5.1, 5.2 etc., and their passage width can be adjusted to the desired thickness of the coating material lamella 10.1 by a calibration device 12. This thickness is usually in the range from 0.02 to 0.08 mm.
  • the lamella flow rate from the flat nozzle 11 and the surface stability essentially depend on the viscosity of the coating starting material.
  • a flat one is required uniform and even outflow from the flat nozzle 11 with the formation of an initially vertically downward flowing slat section 10.2.
  • the coating material lamella 10.1 can be given a deflection effect by an ion beam emanating from the deflection electrode 13, by means of which the lamella 10.1 experiences from the ion impact zone on its surface an inclination ⁇ towards the electrode 13.
  • This path inclination can be set by applying a voltage adapted to the desired inclination angle to the electrode 13.
  • the web inclination tC is expediently chosen such that the coating material lamella 10.1 does come as close as possible to the inner deflection area 3.1 of the outlet-side (second) conveyor arrangement 3, but is not attracted to it. Such a risk exists due to the ionization of the electrode-side surface of the lamella 10.1.
  • the lamella 10.1 runs in an inclined position through the gap 4 against a first inclination-adjustable (double arrow 14.1) collecting flap 14. It is important that the lamella 10.1 is so on the flap 14 strikes that the flowing coating material can flow from the flap surface into a collecting trough 15 without a tendency to jam. This can effectively counteract the occurrence of wave and flutter movements at the lower end of the lamella 10.1.
  • the coating material lamella 10.3 flows directly in the vertical direction in accordance with the broken line in front of the inner deflecting area 2.1 of the (first) conveyor arrangement 2 on the delivery side onto a second collecting flap 16 in the collecting trough 15.
  • This flap like the first collecting flap 14, is appropriately inclined so that the freely running coating material lamella 10.3 flows from the flap surface into the collecting trough 15 without a tendency to jam drains off.
  • a return pump 17 recovers the coating material collected in the collecting trough 15 at appropriate time intervals via a pipeline 18 into the trough 7.1 of the pouring head 7.
  • the coating material lamella (sections 10.2, 10.3) is first brought to the desired thickness of 0.03 to 0.06 mm and uniform outflow from the casting head 7 by adjusting the flat nozzle 11.
  • the lamella runs essentially vertically downwards (broken line 10.3).
  • the deflection electrode 13 is aligned by adjusting its support device 19 and, by applying a high voltage, a potential is applied which is capable of causing deflection of the lamella section 10.1 below the electrode 13 by an acute angle ⁇ .
  • a first substrate in FIG. 1, the plate 5.1 into the casting gap 4 and with a surface coating of the surface of the plate 5.1 with coating material at a speed of 40-60 m / min passed through the casting gap 4 in the direction of arrow A.
  • the forward movement speed of the plate 5.1 and the flow speed of the coating material lamella must be coordinated with one another in such a way that the lamella is slightly stretched when it is placed on the plate surface in order to achieve a clean coating 23.
  • the result of this is that the initial run-up angle ⁇ is slightly reduced to ⁇ 'during the coating operation (phase II), ie the lamella 10.1 starts up somewhat flatter during coating. This state continues until the plate trailing edge 21 'is reached (phase III).
  • the lamella 10.1 breaks off and, due to the now free air access according to arrow 24, it returns to its original inclination ⁇ (phase IV) without occupying the plate drainage side 5.1 ". See also the Plate 5.3 in Fig. 1 on the conveyor assembly 3rd
  • a guiding electrode 13 has a deflector 9 'with two (or more) of deflection electrodes 13', 13 "of FIG. Lb applicable.
  • the with an index Dashed references designate parts which are identical to those from FIG. 1. 1.
  • the pouring head 7 ' can basically be of the same design as that according to Fig. 1.
  • both deflection electrodes 13 ', 13" are constructed on position-changing support devices 19' which, together with an electrode potential adjustment, allow the desired section-wise change in web inclination to be set.
  • the cavity of an elongated, in principle U-shaped, profiled insulating housing 30 has a generally 31 or
  • the electrode housing 30 is expediently provided with flange elements 32 for fastening the deflection electrode on a schematically illustrated support device 19.
  • the electrode arrangement of the embodiment according to FIGS. 2 and 3 essentially consists of a series of approximately prismatic electrode bodies 33 made of a material with high electrical resistance (of the order of 50 M ⁇ .cm).
  • the electrode bodies 33 have the cross-sectional shape of approximately the same limb, slim triangle, the base of which rests on a height compensation and spacer 34, and the tip of which is flush at the level of the top of the housing.
  • the tip regions 35 of all the electrode bodies 33 lie in the longitudinal direction of the deflection electrode 13 on a straight line which runs essentially parallel to the longitudinal axis of the housing.
  • the electrode bodies 33 with a width of 1 to 2 cm are separated from one another by insulating intermediate layers 36 with a thickness of 1.5 to 3 mm and, according to FIG. 2, are connected or fed in parallel with one another by a continuous conductor rod 37.
  • the division of the entire electrode length into a larger number of discrete sections corresponding to the electrode bodies 33 is intended on the one hand to ensure that the charge field distribution along the electrode 13 is as uniform as possible.
  • the resulting division of the total cross-section of the electrode body is intended to keep the contact current strength low in order to prevent spark formation in relation to counter-polar components.
  • the insulating intermediate layers 36 have a thickness of 1.5 to 3 mm and consist of a dimensionally stable material which, together with a casting resin filling the free spaces 38 in the housing 30, can form an integral body.
  • the intermediate insulating layers 36 are expediently centered at least in the height compensation piece 34 in grooves 39 in order to achieve a uniform structure of the electrode arrangement 31.
  • an insulating housing 30 is again used, which is constructed on a support arrangement 19 by means of flange means 32.
  • An electrode arrangement 31 ' is installed in the housing cavity.
  • This essentially exists a central, longitudinal insulating material support wall 40, high-resistance parallel-fed individual resistors 41 arranged on both sides thereof, and a series of prismatic electrode bodies 43 of approximately triangular cross section made of a material with a preferably high electrical resistance. The latter are each plugged onto a pointed contact element 44, so that they are ohmically connected to the outer end of the associated individual resistor 41.
  • the individual resistors 41 with resistance values of 50 to 100 MQ are connected to the common feed rail 42 and the contact elements 44 at a lateral distance from the supporting wall 40 in such a way that they lie alternately to the side of the supporting wall 40.
  • Their outer boundary areas are so far apart that these areas simultaneously center the supporting wall 40 and the triangular tips of the electrode bodies 43 within the insulating housing 30 on the longitudinal plane of the electrodes.
  • the triangular tips of the electrode bodies 43 are again approximately at the level of the top of the housing.
  • the electrode bodies 43 have a width of approximately 10-20 mm (viewed in the longitudinal direction of the electrodes) and are separated from one another by insulating intermediate layers 45.
  • the latter can be inserted into grooves 46 on the upper side of the support wall 40 for uniform spacing. This results, as already described with reference to FIGS. 2, 3, in turn, an optimally uniform charge field distribution along the electrode 13.
  • the intermediate insulating layers 45 can be made of the same material as the intermediate insulating layers 36 of FIG. 2, and the free spaces remaining in the housing cavity between the housing walls and the components of the electrode arrangement 31 'are filled with a casting resin 47.
  • the deflection electrode 13, which is divided into discrete length sections in the manner described, makes it possible to achieve an optimally uniform field distribution along the deflection electrode 13.
  • Different field strength levels between adjacent electrode sections resulting from inhomogeneities in the individual electrode bodies 33, 43 and / or resistance values which are unequal due to tolerance in the high-resistance individual resistors 41 are locally limited.
  • Level differences from uneven surface loads on the electrode due to dirt, dust and / or moisture are within the operationally permissible limits.
  • electrical separation of the feed conductors of individual or groups of electrode bodies 33, 43 from neighboring areas can easily be provided.
  • the above-described deflection device for lamellar, free-flowing, viscous coating material can be used wherever the coating material is to be brought contactlessly from a first (stock) flow direction into a second (deflected) flow direction. Due to the possibility of operating the deflection electrodes with very low local contact currents, the deflection device according to the invention can also be used safely when processing coating materials with easily flammable solvents.

Landscapes

  • Coating Apparatus (AREA)
  • Electrostatic Spraying Apparatus (AREA)
  • Bidet-Like Cleaning Device And Other Flush Toilet Accessories (AREA)
EP86102305A 1985-03-14 1986-02-22 Déflecteur pour matériau de revêtement visqueux s'écoulant librement en forme de lamelle Expired EP0195276B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86102305T ATE34928T1 (de) 1985-03-14 1986-02-22 Ablenkvorrichtung fuer lamellenfoermig freifliessendes viskoses beschichtungsmaterial.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH115285 1985-03-14
CH1152/85 1985-03-14

Publications (2)

Publication Number Publication Date
EP0195276A1 true EP0195276A1 (fr) 1986-09-24
EP0195276B1 EP0195276B1 (fr) 1988-06-08

Family

ID=4203693

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86102305A Expired EP0195276B1 (fr) 1985-03-14 1986-02-22 Déflecteur pour matériau de revêtement visqueux s'écoulant librement en forme de lamelle

Country Status (6)

Country Link
US (1) US4676190A (fr)
EP (1) EP0195276B1 (fr)
JP (1) JPH0615057B2 (fr)
AT (1) ATE34928T1 (fr)
CA (1) CA1299518C (fr)
DE (1) DE3660273D1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0286939A2 (fr) * 1987-04-11 1988-10-19 BASF Aktiengesellschaft Dispositif pour appliquer de la colle sur des éléments en bois
EP0467411A2 (fr) * 1990-07-20 1992-01-22 Fraunhofer-Gesellschaft Zur Förderung Der Angewandten Forschung E.V. Dispositif de recouvrement de pièces par rideau de matériel de revêtement liquide ou fluide
DE29716803U1 (de) * 1997-09-18 1998-01-08 Rauch Walter Vorrichtung zum Beschichten von Teilen mit flüssigen, pastösen, thixotropen und faser- oder partikelhaltigen Stoffen
GB2324054A (en) * 1997-02-14 1998-10-14 Pilkington Uk Ltd Method of coating glass

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0645020B2 (ja) * 1985-03-15 1994-06-15 ナショナル住宅産業株式会社 ワ−ク塗装装置
JPS62273081A (ja) * 1986-05-22 1987-11-27 Fuji Photo Film Co Ltd 多層塗膜の形成方法
US5421516A (en) * 1992-08-04 1995-06-06 Mitsubishi Alminum Kabushiki Kaisha Method and apparatus for coating a solution containing brazing alloy powders and coating head for the curtain coater
US6475572B2 (en) 2000-04-06 2002-11-05 3M Innovative Properties Company Electrostatically assisted coating method with focused web-borne charges
US6368675B1 (en) 2000-04-06 2002-04-09 3M Innovative Properties Company Electrostatically assisted coating method and apparatus with focused electrode field
JP4814596B2 (ja) * 2005-09-15 2011-11-16 株式会社リコー 塗布方法及び塗布装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH435048A (de) * 1966-02-17 1967-04-30 Steinemann Ulrich Ag Verfahren zum Überziehen von Werkstücken und Schlitzgiesseinrichtung zur Durchführung des Verfahrens
FR2299921A1 (fr) * 1975-02-04 1976-09-03 Nippon Kokan Kk Procede d'appli

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US705691A (en) * 1900-02-20 1902-07-29 William James Morton Method of dispersing fluids.
CH352934A (de) * 1957-04-15 1961-03-15 Steinemann Ulrich Ag Lackfördereinrichtung an einer Lackaufgiessmaschine
US3468691A (en) * 1965-10-23 1969-09-23 Lipoma Electronics Co Method of and apparatus for the electrostatic application of solid particles to articles
US4128667A (en) * 1974-01-10 1978-12-05 Polaroid Corporation Manipulation of coating streams with air foils

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH435048A (de) * 1966-02-17 1967-04-30 Steinemann Ulrich Ag Verfahren zum Überziehen von Werkstücken und Schlitzgiesseinrichtung zur Durchführung des Verfahrens
FR2299921A1 (fr) * 1975-02-04 1976-09-03 Nippon Kokan Kk Procede d'appli

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0286939A2 (fr) * 1987-04-11 1988-10-19 BASF Aktiengesellschaft Dispositif pour appliquer de la colle sur des éléments en bois
EP0286939A3 (en) * 1987-04-11 1990-05-02 Basf Aktiengesellschaft Apparatus for applying glue to wooden parts
EP0467411A2 (fr) * 1990-07-20 1992-01-22 Fraunhofer-Gesellschaft Zur Förderung Der Angewandten Forschung E.V. Dispositif de recouvrement de pièces par rideau de matériel de revêtement liquide ou fluide
EP0467411A3 (en) * 1990-07-20 1992-03-25 Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. Apparatus for curtain coating of articles with a liquid or fluid material
GB2324054A (en) * 1997-02-14 1998-10-14 Pilkington Uk Ltd Method of coating glass
DE29716803U1 (de) * 1997-09-18 1998-01-08 Rauch Walter Vorrichtung zum Beschichten von Teilen mit flüssigen, pastösen, thixotropen und faser- oder partikelhaltigen Stoffen

Also Published As

Publication number Publication date
JPS61212361A (ja) 1986-09-20
EP0195276B1 (fr) 1988-06-08
CA1299518C (fr) 1992-04-28
DE3660273D1 (en) 1988-07-14
JPH0615057B2 (ja) 1994-03-02
US4676190A (en) 1987-06-30
ATE34928T1 (de) 1988-06-15

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