US3906122A - Method for coating metal anodes with electroconductive paint - Google Patents

Method for coating metal anodes with electroconductive paint Download PDF

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Publication number
US3906122A
US3906122A US436349A US43634974A US3906122A US 3906122 A US3906122 A US 3906122A US 436349 A US436349 A US 436349A US 43634974 A US43634974 A US 43634974A US 3906122 A US3906122 A US 3906122A
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US
United States
Prior art keywords
paint
cylinder
cylinders
anode
electroconductive
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
US436349A
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English (en)
Inventor
Janusz Josef Henryk Krause
David Alan Denton
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Imperial Chemical Industries Ltd
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Imperial Chemical Industries Ltd
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Publication of US3906122A publication Critical patent/US3906122A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/16—Arrangements for supplying liquids or other fluent material
    • B05B5/1608—Arrangements for supplying liquids or other fluent material the liquid or other fluent material being electrically conductive
    • B05B5/1675—Arrangements for supplying liquids or other fluent material the liquid or other fluent material being electrically conductive the supply means comprising a piston, e.g. a piston pump
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/16—Arrangements for supplying liquids or other fluent material
    • B05B5/1608—Arrangements for supplying liquids or other fluent material the liquid or other fluent material being electrically conductive
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B9/00—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
    • B05B9/03—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material
    • B05B9/04—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump
    • B05B9/0403—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump with pumps for liquids or other fluent material
    • B05B9/0406—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump with pumps for liquids or other fluent material with several pumps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B9/00—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
    • B05B9/03—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material
    • B05B9/04—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump
    • B05B9/0403—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump with pumps for liquids or other fluent material
    • B05B9/0409—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump with pumps for liquids or other fluent material the pumps being driven by a hydraulic or a pneumatic fluid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B9/00—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
    • B05B9/03—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material
    • B05B9/04—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump
    • B05B9/0403—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump with pumps for liquids or other fluent material
    • B05B9/0423—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump with pumps for liquids or other fluent material for supplying liquid or other fluent material to several spraying apparatus

Definitions

  • the invention relates to coating of metal anodes with electroconductive paint.
  • the application of paint to a surface of an object by spraying from an air atomization spray gun is a well known technique, but can lead to substantial losses of paint owing to a carry over of paint in the air flow into regions outside the actual area to be coated.'These losses are especially important when using expensive paints, e.g. the electroconductive paints used in the coating of titanium anodes for use in mercury cells. Such losses may be substantially reduced by the use of an electrostatic spraying technique in which the charged paint droplets are attracted to the object to be sprayed.
  • a conventional electrostatic spray gun for example, the paint is fed to a gun charged at a high positive potential where it is atomized (e.g. by air pressure or by centrifugal action), and the .object to be coated is grounded.
  • a method for spraying a predetermined amount of paint at a controlled uniform rate which comprises in combination an electrostatic spray gun and a paint delivery device for the gun which operates on a piston and cylinder principle.
  • the cylinder of the delivery device is provided with an inlet for introducing paint thereto, and an outlet through which the paint is delivered to the gun, the said inlet and outlet being provided with independently operable valves.
  • the piston is associated with an actuating means for moving said piston within the cylinder, whereby paint is introduced into the cylinder on one stroke of the piston (with the inlet valve open and the outlet valve closed) and paint is discharged on the opposite stroke of the piston (with the inlet valve closed and the outlet valve open).
  • Any conventional actuating means may be used, for example a mechanical actuating means such as a screw jack, or a hydraulic actuating means, for example a hydraulic cylinder coupled to the piston by means of a suitable linkage.
  • the actuating means whether mechanical or hydraulic, may itself be actuated electrically, mechanically or pneumatically. Suitable arrangements include a screw jack or a hydraulic cylinder in association with a variable speed drive electric motor.
  • the apparatus may suitably include one or more piston and cylinder devices for delivering the paint in conjunction with one or more actuating means and one or more electrostatic spray guns.
  • the apparatus comprises two electrostatic spray guns, each with its own piston and cylinder delivery device, the said delivery devices being associated with a single actuating means.
  • a delivery device In practice, it is preferred to fill a delivery device rapidly with paint, while discharging the said paint at a controlled, predetermined and usually slow, rate.
  • the delivery device may be advantageously used to meter accurately very small flows such as l to 10 ml/minute, for example 1 to 5 ml/minute.
  • the spraying may conveniently be operated in a batchwise manner by adjusting the rate of delivery to correspond to the overall spraying time required.
  • the operation of any one delivery device including the opening and closing of the valves, or of a plurality of such deliverydevices, may be fully automated if desired.
  • the electrostatic spray gun(s) and the object to be sprayed are conveniently moved relative to one another. It is especially convenient to move the object at constant rate transverse to the electrostatic spray gun.
  • the apparatus for practicing the present method comprises two electrostatic spray guns 1, 2 in combination with two piston and cylinder delivery devices (designated generally as 3, 4).
  • Each gun I, 2 is provided with a rotating hell (not shown) for atomizing paint delivered to the gun and is connected to a high voltage supply (I-IV) for charging the gun to a suitably high electric potential relative to an electrode 25 to be sprayed, which electrode is grounded.
  • Each delivery device 3, 4 comprises a closed cylinder 5, 6 in which moves a piston 7, 8.
  • the cylinders 5, 6 are respectively provided with inlets 9, 10 for introduction of paint thereto, the said inlets 9, 10 being connected via valves 11, 12 and a common pipe 13 and valve 14 to a head vessel 15 for paint.
  • Cylinder 5 is further provided with an outlet 16 for delivery of paint which connects via valve 17 to the head of gun 1.
  • Cylinder 6 is further provided with an outlet 18 for delivery of paint which connects via valve 19 to the head of gun 2.
  • the pistons 7, 8 are connected respectively by rods 20, 21 to a bridge member 22, which is in turn connected via rod 23 to an actuator 24.
  • the actuator 24 may be of any suitable type such as one of a wide variety of conventional hydraulic or mechanical actuators. Operation of the actuator causes upwards or downwards movement of the bridge member 21, which in turn causes the pistons 7, 8 to move upwardly or downward respectively in cylinders 5, 6.
  • a paint is introduced into the head vessel 15 with valves 11, 12 and 14 in their closed position.
  • Valve 14 is opened, followed by valves 11 and 12.
  • the actuator 24 is operated to lower the pistons 7, 8 within cylinder 5, 6, thereby drawing paint into the said cylinders.
  • the valves 11, 12, and 14 are then closed and the valves 17 and 19 opened.
  • the actuator 24 is then operated to raise the pistons 7, Sat a definite rate, thereby delivering to the guns 1, 2 the desired amount of paint in the desired time (e.g. at the rate of l to ml/minute).
  • the invention is especially applicable to the spraying of electroconductive paints, e.g. the electroconductive paints used for coating of titanium anodes for use in electrolytic cells.
  • Preferred coatings include platinum, platinum/iridium alloys, platinum group metal oxides, particularly ruthenium oxide, and especially mixtures of platinum group metal oxides and film-forming metal oxides, for example ruthenium oxide and titanium dioxide.
  • the platinum metal coatings may be formed, for example, by electrodeposition on the film-forming metal, for example as described in UK. Patent No. 1,237,077. Platinum group metals and their conducting compounds, particularly oxides, are readily produced by the thermal decomposition techniques, as described for example in UK. Patent Nos. 1,147,442; 1,195,871;
  • the invention is further illustrated by the following Example.
  • Example Two electrostatic spray guns were arranged, one above the other, so that the one gun was directed on the top half of a titanium anode (14 in X 10.5 in) and the other gun was directed on the bottom half.
  • An electroconductive paint composition consisting of ruthenium trichloride and an organic titanium compound dissolved in an alcohol, was fed at the rate of 3 ml/minute to each of the guns.
  • the titanium anode was moved transverse to the paint sprays at the rate of 1 ft/minute.
  • the anode was fired at 180C to remove the alcohol and then at 450C to thermally decompose and oxidize the paint constituents to give a coating consisting of a mixture of ruthenium oxide and titanium dioxide.
  • the spraying and firing operations were repeated several times to give the desired thickness of electroconductive coating.
  • a method of coating metal anodes with electroconductive paint comprising the steps of a. providing an electrostatic spray gun at a high electrical potential,
  • a method as recited in claim 1 comprising the further step of transversely moving said metal anode continuous surface to be coated relative to said spray gun.
  • a method as recited in claim 1 comprising the further steps of, after the volume of paint in 'said cylinder has been depleted, preventing delivery of paint from said cylinder to said spray gun, providing for communication between'said cylinder and a paint reservoir, and withdrawing the piston in said cylinder .and thereby simultaneously providing for the intake of another predetermined volume of electroconductive paint from said reservoir into said cylinder, whereby said method may be repeated.
  • a method of coating metal anodes with electroconductive paint comprising the steps of a. providing a plurality of electrostatic spray guns at a high electrical potential
  • a method as recited in claim 8 comprising the further step of transversely moving said metal anode continuous surface to be coated relative to said spray guns.
  • a method as recited in claim 8 comprising the further steps of, after the volume of paint in said cylinders has been depleted, preventing delivery of paint from said cylinders to said spray guns, providing for communication between said cylinders and a paint reservoir, and withdrawing the piston in each of said cylinders and thereby simultaneously providing for the intake of electroconductive paint from said reservoir into said cylinders, whereby said method may be repeated.

Landscapes

  • Application Of Or Painting With Fluid Materials (AREA)
  • Electrostatic Spraying Apparatus (AREA)
US436349A 1973-02-02 1974-01-24 Method for coating metal anodes with electroconductive paint Expired - Lifetime US3906122A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB523773A GB1393333A (en) 1973-02-02 1973-02-02 Apparatus for spraying paint

Publications (1)

Publication Number Publication Date
US3906122A true US3906122A (en) 1975-09-16

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
US436349A Expired - Lifetime US3906122A (en) 1973-02-02 1974-01-24 Method for coating metal anodes with electroconductive paint

Country Status (8)

Country Link
US (1) US3906122A (it)
JP (1) JPS5738312B2 (it)
BE (1) BE810290A (it)
BR (1) BR7400685D0 (it)
CA (1) CA1045374A (it)
ES (1) ES422883A1 (it)
GB (1) GB1393333A (it)
IT (1) IT1007138B (it)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4085892A (en) * 1976-04-21 1978-04-25 Dalton Robert E Continuously energized electrostatic coating voltage block
US4879137A (en) * 1987-05-27 1989-11-07 Behr Industrieanlagen Gmbh & Co. Method and apparatus for electrostatic coating with conductive material
US4921169A (en) * 1986-03-24 1990-05-01 Leif Tilly Method for supplying an electrically conductive floating medium and a device for performing the method
US5197676A (en) * 1990-07-18 1993-03-30 Nordson Corporation Apparatus for dispensing conductive coating materials
US5271569A (en) * 1990-07-18 1993-12-21 Nordson Corporation Apparatus for dispensing conductive coating materials
US5292036A (en) * 1991-06-11 1994-03-08 Sames S.A. Adjustable capacity storage tank for liquid product
US5326031A (en) * 1992-10-15 1994-07-05 Nordson Corporation Apparatus for dispensing conductive coating materials including color changing capability
US5341990A (en) * 1993-06-11 1994-08-30 Nordson Corporation Apparatus and method for dispensing electrically conductive coating material including a pneumatic/mechanical control
US5549755A (en) * 1994-12-08 1996-08-27 Nordson Corporation Apparatus for supplying conductive coating materials including transfer units having a combined shuttle and pumping device
US5947392A (en) * 1997-09-12 1999-09-07 Noroson Corporation Two-component metering and mixing system for electrically conductive coating material
EP0941961A1 (de) * 1998-03-13 1999-09-15 Robatech AG Anlage zum Fördern einer Flüssigkeit und Verwendung der Anlage
US6705361B2 (en) 2001-11-21 2004-03-16 Fanuc Robotics North America, Inc. Apparatus and method for filling a painting robot canister
US20110052829A1 (en) * 2007-06-12 2011-03-03 Gerhard Brendel Coating method, coating station, and method for coating an object
CN103752443A (zh) * 2014-01-25 2014-04-30 重庆长江涂装设备有限责任公司 多组分涂料喷涂机
EP3546618A4 (en) * 2017-08-23 2020-03-11 LG Chem, Ltd. ANODE FOR ELECTROLYSIS AND PRODUCTION METHOD THEREFOR
EP3819402A4 (en) * 2018-07-06 2021-08-25 Lg Chem, Ltd. REDUCING ELECTRODE FOR ELECTROLYSIS AND PROCESS FOR THEIR PRODUCTION
US12146232B2 (en) 2018-07-06 2024-11-19 Lg Chem, Ltd. Active layer composition of reduction electrode for electrolysis and reduction electrode derived therefrom

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58170002U (ja) * 1982-05-08 1983-11-12 パイオニアビデオ株式会社 デイスクプレ−ヤにおけるデイスク駆動部の調整機構
DE3440381A1 (de) * 1984-11-05 1986-05-07 Ransburg Gmbh, 6056 Heusenstamm Verfahren und vorrichtung zum automatischen elektrostatischen spruehbeschichten
US4982903A (en) * 1988-06-17 1991-01-08 Ransburg Corporation Peristaltic voltage block
US4878622A (en) * 1988-06-17 1989-11-07 Ransburg Corporation Peristaltic voltage block
US5058812A (en) * 1988-06-17 1991-10-22 Ransburg Corporation System for dispensing of both water base and organic solvent base coatings
CA2055901A1 (en) * 1990-11-26 1992-05-27 James J. Gimple Automatic coating using conductive coating materials
US5193750A (en) * 1991-03-22 1993-03-16 Ransburg Corporation Peristaltic voltage block roller actuator
US5154357A (en) * 1991-03-22 1992-10-13 Ransburg Corporation Peristaltic voltage blocks
GB9115275D0 (en) * 1991-07-15 1991-08-28 Unilever Plc Colour cosmetic spray system
GB9115278D0 (en) * 1991-07-15 1991-08-28 Unilever Plc Liquid spraying apparatus and method
GB9115276D0 (en) * 1991-07-15 1991-08-28 Unilever Plc Skin treatment system
US5746831A (en) * 1994-07-12 1998-05-05 Ransburg Corporation Voltage block
US6423143B1 (en) 1999-11-02 2002-07-23 Illinois Tool Works Inc. Voltage block monitoring system
US6918551B2 (en) 2003-07-17 2005-07-19 Illinois Tool Works Inc. Dual purge manifold
US7455249B2 (en) 2006-03-28 2008-11-25 Illinois Tool Works Inc. Combined direct and indirect charging system for electrostatically-aided coating system

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US1250474A (en) * 1917-05-17 1917-12-18 Atha W Lee Automobile-pump.
US2785088A (en) * 1951-11-23 1957-03-12 Ransburg Electro Coating Corp Electrostatic coating apparatus and method
US3040992A (en) * 1960-10-17 1962-06-26 Wiegand Willy Fluid-dispensing control
US3144831A (en) * 1961-07-13 1964-08-18 Beckman Instruments Inc Fluid gradient engine
US3169883A (en) * 1961-10-25 1965-02-16 Ransburg Electro Coating Corp Electrostatic coating methods and apparatus
US3512502A (en) * 1966-10-21 1970-05-19 Ransburg Electro Coating Corp Electrostatic coating apparatus
US3784335A (en) * 1971-12-13 1974-01-08 Irc Corp Proportioning pump

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Publication number Priority date Publication date Assignee Title
US1250474A (en) * 1917-05-17 1917-12-18 Atha W Lee Automobile-pump.
US2785088A (en) * 1951-11-23 1957-03-12 Ransburg Electro Coating Corp Electrostatic coating apparatus and method
US3040992A (en) * 1960-10-17 1962-06-26 Wiegand Willy Fluid-dispensing control
US3144831A (en) * 1961-07-13 1964-08-18 Beckman Instruments Inc Fluid gradient engine
US3169883A (en) * 1961-10-25 1965-02-16 Ransburg Electro Coating Corp Electrostatic coating methods and apparatus
US3512502A (en) * 1966-10-21 1970-05-19 Ransburg Electro Coating Corp Electrostatic coating apparatus
US3784335A (en) * 1971-12-13 1974-01-08 Irc Corp Proportioning pump

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4085892A (en) * 1976-04-21 1978-04-25 Dalton Robert E Continuously energized electrostatic coating voltage block
US4921169A (en) * 1986-03-24 1990-05-01 Leif Tilly Method for supplying an electrically conductive floating medium and a device for performing the method
US4879137A (en) * 1987-05-27 1989-11-07 Behr Industrieanlagen Gmbh & Co. Method and apparatus for electrostatic coating with conductive material
US5197676A (en) * 1990-07-18 1993-03-30 Nordson Corporation Apparatus for dispensing conductive coating materials
US5271569A (en) * 1990-07-18 1993-12-21 Nordson Corporation Apparatus for dispensing conductive coating materials
US5292036A (en) * 1991-06-11 1994-03-08 Sames S.A. Adjustable capacity storage tank for liquid product
US5326031A (en) * 1992-10-15 1994-07-05 Nordson Corporation Apparatus for dispensing conductive coating materials including color changing capability
USRE35883E (en) * 1992-10-15 1998-09-01 Nordson Corporation Apparatus for dispensing conductive coating materials including color changing capability
US5707013A (en) * 1993-06-11 1998-01-13 Nordson Corporation Apparatus and method for dispensing electrically conductive coating material including a pneumatic/mechanical control
US5538186A (en) * 1993-06-11 1996-07-23 Nordson Corporation Apparatus and method for dispensing electrically conductive coating material including a pneumatic/mechanical control
US5341990A (en) * 1993-06-11 1994-08-30 Nordson Corporation Apparatus and method for dispensing electrically conductive coating material including a pneumatic/mechanical control
US5549755A (en) * 1994-12-08 1996-08-27 Nordson Corporation Apparatus for supplying conductive coating materials including transfer units having a combined shuttle and pumping device
US5759277A (en) * 1994-12-08 1998-06-02 Nordson Corporation Manual and automatic apparatus for supplying conductive coating materials including transfer units having a combined shuttle and pumping device
US5947392A (en) * 1997-09-12 1999-09-07 Noroson Corporation Two-component metering and mixing system for electrically conductive coating material
US6173867B1 (en) 1998-03-13 2001-01-16 Robatech Ag Installation for conveying a liquid and use of the installation
EP0941961A1 (de) * 1998-03-13 1999-09-15 Robatech AG Anlage zum Fördern einer Flüssigkeit und Verwendung der Anlage
US6705361B2 (en) 2001-11-21 2004-03-16 Fanuc Robotics North America, Inc. Apparatus and method for filling a painting robot canister
US20110052829A1 (en) * 2007-06-12 2011-03-03 Gerhard Brendel Coating method, coating station, and method for coating an object
CN103752443A (zh) * 2014-01-25 2014-04-30 重庆长江涂装设备有限责任公司 多组分涂料喷涂机
CN103752443B (zh) * 2014-01-25 2016-01-20 重庆长江涂装设备有限责任公司 多组分涂料喷涂机
EP3546618A4 (en) * 2017-08-23 2020-03-11 LG Chem, Ltd. ANODE FOR ELECTROLYSIS AND PRODUCTION METHOD THEREFOR
EP3819402A4 (en) * 2018-07-06 2021-08-25 Lg Chem, Ltd. REDUCING ELECTRODE FOR ELECTROLYSIS AND PROCESS FOR THEIR PRODUCTION
US12146232B2 (en) 2018-07-06 2024-11-19 Lg Chem, Ltd. Active layer composition of reduction electrode for electrolysis and reduction electrode derived therefrom

Also Published As

Publication number Publication date
JPS5738312B2 (it) 1982-08-14
BR7400685D0 (pt) 1974-11-05
IT1007138B (it) 1976-10-30
AU6477074A (en) 1975-07-24
JPS49107340A (it) 1974-10-11
GB1393333A (en) 1975-05-07
CA1045374A (en) 1979-01-02
ES422883A1 (es) 1976-09-16
BE810290A (fr) 1974-07-29

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