WO2024025523A1 - Electrostatic sprayer - Google Patents

Electrostatic sprayer Download PDF

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Publication number
WO2024025523A1
WO2024025523A1 PCT/US2022/038500 US2022038500W WO2024025523A1 WO 2024025523 A1 WO2024025523 A1 WO 2024025523A1 US 2022038500 W US2022038500 W US 2022038500W WO 2024025523 A1 WO2024025523 A1 WO 2024025523A1
Authority
WO
WIPO (PCT)
Prior art keywords
electrostatic sprayer
applicator
electrodes
sprayer
electrostatic
Prior art date
Application number
PCT/US2022/038500
Other languages
French (fr)
Inventor
Alex Wolf
Benjamin SZIRONY
David Seitz
James Baltz
Original Assignee
Carlisle Fluid 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 Carlisle Fluid Technologies, LLC filed Critical Carlisle Fluid Technologies, LLC
Priority to PCT/US2022/038500 priority Critical patent/WO2024025523A1/en
Publication of WO2024025523A1 publication Critical patent/WO2024025523A1/en

Links

Classifications

    • 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
    • B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
    • B05B5/053—Arrangements for supplying power, e.g. charging power
    • B05B5/0533—Electrodes specially adapted therefor; Arrangements of electrodes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
    • B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
    • B05B13/04—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the spray heads being moved during spraying operation
    • B05B13/0431—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the spray heads being moved during spraying operation with spray heads moved by robots or articulated arms, e.g. for applying liquid or other fluent material to 3D-surfaces
    • 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
    • B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
    • B05B5/04—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces
    • B05B5/0403—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces characterised by the rotating member
    • B05B5/0407—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces characterised by the rotating member with a spraying edge, e.g. like a cup or a bell

Definitions

  • an electrostatic sprayer that can include an applicator rotatably attached to a shaft and a field consisting of charged air surrounding an outer surface of the applicator, wherein the field is generated by a plurality of electrodes radially spaced around the applicator in electrical communication with a power source.
  • An electrostatic sprayer can include an applicator rotatably attached to a shaft and a field consisting of charged air surrounding an outer surface of the applicator, wherein the field is generated by a plurality of electrodes radially spaced around the applicator in electrical communication with a power source.
  • FIG.1 is a view of the embodiments described herein.
  • FIG.2 is a view of the embodiments described herein with a portion removed.
  • FIG.3 is a view of the embodiments described herein with a portion removed.
  • FIG.4 is a cutaway view of the embodiments described herein.
  • FIG.5 is a cutaway view of the embodiments described herein.
  • an electrostatic sprayer 10 can include an applicator 20 rotatably attached to a shaft 40 and a field 50 consisting of charged air surrounding an outer surface 22 of the applicator 20, wherein the field 50 is generated by a plurality of electrodes 60 radially spaced around the applicator 20 in electrical communication with a power source 30.
  • the electrostatic sprayer 10 can provide that the electrostatic sprayer 10 is configured to deliver a water based paint to a grounded 100 target.
  • the electrostatic sprayer 10 can provide that the electrostatic sprayer 10 is configured to charge the water based paint based on atomization of the water based paint by the applicator 20. In some embodiments, the electrostatic sprayer 10 can provide that the water based paint is configured to be at a ground potential before being charged by the field 50. In some embodiments, the electrostatic sprayer 10 can provide that the plurality of electrodes 60 are wires mounted on a circuit board 70. According to certain embodiments, the electrostatic sprayer 10 can provide that the plurality of electrodes 60 is electrically connected to a circuit board 70. According to an exemplary embodiment the electrostatic sprayer 10 can provide that the circuit board 70 is mounted axially behind the applicator 20.
  • the electrostatic sprayer 10 can provide that the electrostatic sprayer 10 comprises a high voltage ring 90, wherein the high voltage ring 90 comprises the circuit board 70. According to certain embodiments, the electrostatic sprayer 10 can provide that the high voltage ring 90 is removably attached to a robot arm by a quick disconnect interference fit 150. In some embodiments, the electrostatic sprayer 10 can provide that the applicator 20 is a bell cup. According to certain embodiments, the electrostatic sprayer 10 can provide that the bell cup
  • the electrostatic sprayer 10 of can include an applicator 20 rotatably attached to a shaft 40; and a high voltage ring 90 comprising a hollow disc 140 circumscribing the shaft 40, wherein the hollow disc 140 consists of a conductive material 110 in electrical communication with a power source 30.
  • the electrostatic sprayer 10 can provide that the hollow disc 140 is in electrical communication with a plurality of electrodes 60 radially evenly spaced around the hollow disc 140.
  • the electrostatic sprayer 10 can provide that the hollow disc 140 comprises a disc outer diameter 160 of between 3 inches (7.6 cm) and 6 inches (15.2 cm). According to certain embodiments, the electrostatic sprayer 10 can provide that the hollow disc 140 comprises a disc outer diameter 160 of between 4 inches (10.2 cm) and 6 inches (15.2 cm). According to an exemplary embodiment the electrostatic sprayer 10 can provide that the hollow disc 140 comprises a disc outer diameter 160 of between 5 inches (12.7 cm) and 6 inches (15.2 cm). According to an exemplary embodiment the electrostatic sprayer 10 can provide that the high voltage ring 90 comprises a high voltage ring outer diameter 170 of between 4 inches (10.2 cm) and 7 inches (17.8 cm).
  • the electrostatic sprayer 10 can provide that the high voltage ring outer diameter 170 is at least 5 inches (12.7 cm). According to certain embodiments, the electrostatic sprayer 10 can provide that the high voltage ring outer diameter 170 is at least 6 inches (15.2 cm). In some embodiments, the limited size of the planar circle 140 and high voltage ring 90 can provide that the electrostatic sprayer 10 can be used in tighter spaces to coat surfaces therein, such as wheel wells, door jambs, trunks, and engine compartments.
  • the electrostatic sprayer 10 can provide that each of the plurality of electrodes 60 comprises a base portion 180, wherein the base portion 180 of each electrode is held within a base insulative ring 190, wherein the base insulative ring 190 is immediately adjacent to the hollow disc 140.
  • the electrostatic sprayer 10 of can include a high voltage electrical connection 200 that electrically connects the conductive material 110 to a power source 30.
  • the electrostatic sprayer 10 can provide that the power source 30 is an external high voltage connection or turbine.
  • the electrostatic sprayer 10 can provide that high voltage electrical connection 200 comprises a resistance 210, wherein the resistance 210 is between 40 and 80 megaohms.
  • the electrostatic sprayer 10 of can provide that the resistance 210 is between 50 and 70 megaohms. According to certain embodiments, the electrostatic sprayer 10 can provide that the resistance 210 is between 55 and 65 megaohms. According to certain embodiments, the electrostatic sprayer 10 can provide that the power source 30 is configured to charge the hollow disc 140 to between 50 and 80 kilovolts. The electrostatic sprayer 10 of can provide that the power source 30 is configured to charge the hollow disc 140 to between 60 and 70 kilovolts. According to certain embodiments, the electrostatic sprayer 10 can provide that the hollow disc 140 comprises a forward surface, wherein the forward surface is covered by an insulative layer. The electrostatic sprayer 10 of can provide that the insulative layer is a two-part epoxy 230.
  • the electrostatic sprayer 10 can provide that the electrodes 60 protrude 220 between 0.5 mm and 1.5 mm from the insulative layer. While the presently disclosed concepts have been described with reference to one or more particular embodiments, those skilled in the art will recognize that many changes may be made thereto without departing from the spirit and scope of the presently disclosed concepts. Any combination and/or sub-combination of the examples, embodiments, aspects, claims, methods, acts, processes, claim elements, or components disclosed herein, however termed, are expressly contemplated as falling within the present concepts.

Abstract

An electrostatic sprayer comprising: an applicator rotatably attached to a shaft; and a field consisting of charged air surrounding an outer surface of the applicator, wherein the field is generated by a plurality of electrodes radially spaced around the applicator in electrical communication with a power source. The electrostatic sprayer may be configured to deliver a water based paint to a grounded target. The plurality of electrodes may be wires mounted on a circuit board. The applicator may comprise a bell cup. The plurality of electrodes may be spaced by a conductive material, wherein the conductive material forms a planar circle. The applicator may comprise an applicator edge, wherein there is an uninterrupted line of sight between at least one electrode and every point on the applicator edge

Description

ELECTROSTATIC SPRAYER BACKGROUND This disclosure relates an electrostatic sprayer that can include an applicator rotatably attached to a shaft and a field consisting of charged air surrounding an outer surface of the applicator, wherein the field is generated by a plurality of electrodes radially spaced around the applicator in electrical communication with a power source. SUMMARY An electrostatic sprayer can include an applicator rotatably attached to a shaft and a field consisting of charged air surrounding an outer surface of the applicator, wherein the field is generated by a plurality of electrodes radially spaced around the applicator in electrical communication with a power source. BRIEF DESCRIPTION OF THE FIGURES FIG.1 is a view of the embodiments described herein. FIG.2 is a view of the embodiments described herein with a portion removed. FIG.3 is a view of the embodiments described herein with a portion removed. FIG.4 is a cutaway view of the embodiments described herein. FIG.5 is a cutaway view of the embodiments described herein. DETAILED DESCRIPTION In the following description of the various embodiments, reference is made to the accompanying drawings identified above which form a part hereof and in which is shown by
meant to encompass the items listed thereafter and equivalents thereof as well as additional items and equivalents thereof. As shown in FIG.1-FIG.5, in an embodiment, an electrostatic sprayer 10 can include an applicator 20 rotatably attached to a shaft 40 and a field 50 consisting of charged air surrounding an outer surface 22 of the applicator 20, wherein the field 50 is generated by a plurality of electrodes 60 radially spaced around the applicator 20 in electrical communication with a power source 30. According to certain embodiments, the electrostatic sprayer 10 can provide that the electrostatic sprayer 10 is configured to deliver a water based paint to a grounded 100 target. According to certain embodiments, the electrostatic sprayer 10 can provide that the electrostatic sprayer 10 is configured to charge the water based paint based on atomization of the water based paint by the applicator 20. In some embodiments, the electrostatic sprayer 10 can provide that the water based paint is configured to be at a ground potential before being charged by the field 50. In some embodiments, the electrostatic sprayer 10 can provide that the plurality of electrodes 60 are wires mounted on a circuit board 70. According to certain embodiments, the electrostatic sprayer 10 can provide that the plurality of electrodes 60 is electrically connected to a circuit board 70. According to an exemplary embodiment the electrostatic sprayer 10 can provide that the circuit board 70 is mounted axially behind the applicator 20. According to an exemplary embodiment the electrostatic sprayer 10 can provide that the electrostatic sprayer 10 comprises a high voltage ring 90, wherein the high voltage ring 90 comprises the circuit board 70. According to certain embodiments, the electrostatic sprayer 10 can provide that the high voltage ring 90 is removably attached to a robot arm by a quick disconnect interference fit 150. In some embodiments, the electrostatic sprayer 10 can provide that the applicator 20 is a bell cup. According to certain embodiments, the electrostatic sprayer 10 can provide that the bell cup
base 245 axially behind 85 the applicator 20 that narrows sharply leading into an upper shroud linear portion 246 circumscribing the shaft 40 that does not narrow. The electrostatic sprayer 10 of can include an applicator 20 rotatably attached to a shaft 40; and a high voltage ring 90 comprising a hollow disc 140 circumscribing the shaft 40, wherein the hollow disc 140 consists of a conductive material 110 in electrical communication with a power source 30. In some embodiments, the electrostatic sprayer 10 can provide that the hollow disc 140 is in electrical communication with a plurality of electrodes 60 radially evenly spaced around the hollow disc 140. According to certain embodiments, the electrostatic sprayer 10 can provide that the hollow disc 140 comprises a disc outer diameter 160 of between 3 inches (7.6 cm) and 6 inches (15.2 cm). According to certain embodiments, the electrostatic sprayer 10 can provide that the hollow disc 140 comprises a disc outer diameter 160 of between 4 inches (10.2 cm) and 6 inches (15.2 cm). According to an exemplary embodiment the electrostatic sprayer 10 can provide that the hollow disc 140 comprises a disc outer diameter 160 of between 5 inches (12.7 cm) and 6 inches (15.2 cm). According to an exemplary embodiment the electrostatic sprayer 10 can provide that the high voltage ring 90 comprises a high voltage ring outer diameter 170 of between 4 inches (10.2 cm) and 7 inches (17.8 cm). According to certain embodiments, the electrostatic sprayer 10 can provide that the high voltage ring outer diameter 170 is at least 5 inches (12.7 cm). According to certain embodiments, the electrostatic sprayer 10 can provide that the high voltage ring outer diameter 170 is at least 6 inches (15.2 cm). In some embodiments, the limited size of the planar circle 140 and high voltage ring 90 can provide that the electrostatic sprayer 10 can be used in tighter spaces to coat surfaces therein, such as wheel wells, door jambs, trunks, and engine compartments. In some embodiments, the electrostatic sprayer 10 can provide that each of the plurality of electrodes 60 comprises a base portion 180, wherein the base portion 180 of each electrode is held within a base insulative ring 190, wherein the base insulative ring 190 is immediately adjacent to the hollow disc 140. The electrostatic sprayer 10 of can include a high voltage electrical connection 200 that electrically connects the conductive material 110 to a power source 30. According to certain embodiments, the electrostatic sprayer 10 can provide that the power source 30 is an external high voltage connection or turbine. In some embodiments, the electrostatic sprayer 10 can provide that high voltage electrical connection 200 comprises a resistance 210, wherein the resistance 210 is between 40 and 80 megaohms. The electrostatic sprayer 10 of can provide that the resistance 210 is between 50 and 70 megaohms. According to certain embodiments, the electrostatic sprayer 10 can provide that the resistance 210 is between 55 and 65 megaohms. According to certain embodiments, the electrostatic sprayer 10 can provide that the power source 30 is configured to charge the hollow disc 140 to between 50 and 80 kilovolts. The electrostatic sprayer 10 of can provide that the power source 30 is configured to charge the hollow disc 140 to between 60 and 70 kilovolts. According to certain embodiments, the electrostatic sprayer 10 can provide that the hollow disc 140 comprises a forward surface, wherein the forward surface is covered by an insulative layer. The electrostatic sprayer 10 of can provide that the insulative layer is a two-part epoxy 230. According to certain embodiments, the electrostatic sprayer 10 can provide that the electrodes 60 protrude 220 between 0.5 mm and 1.5 mm from the insulative layer. While the presently disclosed concepts have been described with reference to one or more particular embodiments, those skilled in the art will recognize that many changes may be made thereto without departing from the spirit and scope of the presently disclosed concepts. Any combination and/or sub-combination of the examples, embodiments, aspects, claims, methods, acts, processes, claim elements, or components disclosed herein, however termed, are expressly contemplated as falling within the present concepts. For example, although various aspects of the present concepts are set forth in the appended claims, wherein the dependent claims relate back to selected preceding claims, including the independent claim, it is to be understood that each of the dependent claims may properly depend from any of the preceding claims, to the extent not logically excluded, in accord with aspects of the present concepts. Thus, for example, the present concepts expressly include every possible combination of dependent claims with their respective independent claim, regardless of stated dependency. Further, the presently disclosed concepts are considered to include, without limitation, any combination

Claims

CLAIMS We Claim: 1. An electrostatic sprayer comprising: an applicator rotatably attached to a shaft; and a field consisting of charged air surrounding an outer surface of the applicator, wherein the field is generated by a plurality of electrodes radially spaced around the applicator in electrical communication with a power source. 2. The electrostatic sprayer of claim 1, wherein the electrostatic sprayer is configured to deliver a water based paint to a grounded target. 3. The electrostatic sprayer of claim 2, wherein the electrostatic sprayer is configured to charge the water based paint based on atomization of the water based paint by the applicator. 4. The electrostatic sprayer of claim 3, wherein the water based paint is configured to be at a ground potential before being charged by the field. 5. The electrostatic sprayer of claim 1, wherein the plurality of electrodes are wires mounted on a circuit board.
8. The electrostatic sprayer of claim 7, wherein the electrostatic sprayer comprises a high voltage ring, wherein the high voltage ring comprises the circuit board. 9. The electrostatic sprayer of claim 8, wherein the high voltage ring is removably attached to a robot arm by a quick disconnect interference fit. 10. The electrostatic sprayer of claim 1, wherein the applicator is a bell cup. 11. The electrostatic sprayer of claim 10, wherein the bell cup is grounded. 12. The electrostatic sprayer of claim 1, wherein the plurality of electrodes is spaced by a conductive material, wherein the conductive material forms a planar circle. 13. The electrostatic sprayer of claim 1, wherein the applicator comprises an applicator edge, wherein there is an uninterrupted line of sight between at least one electrode and every point on the applicator edge.
PCT/US2022/038500 2022-07-27 2022-07-27 Electrostatic sprayer WO2024025523A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/US2022/038500 WO2024025523A1 (en) 2022-07-27 2022-07-27 Electrostatic sprayer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2022/038500 WO2024025523A1 (en) 2022-07-27 2022-07-27 Electrostatic sprayer

Publications (1)

Publication Number Publication Date
WO2024025523A1 true WO2024025523A1 (en) 2024-02-01

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2022/038500 WO2024025523A1 (en) 2022-07-27 2022-07-27 Electrostatic sprayer

Country Status (1)

Country Link
WO (1) WO2024025523A1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5039019A (en) * 1990-08-01 1991-08-13 Illinois Tool Works, Inc. Indirect charging electrostatic coating apparatus
US20080006726A1 (en) * 2004-12-28 2008-01-10 Ransburg Industrial Finishing K.K. Electrostatic Paint Sprayer
US20210162433A1 (en) * 2019-12-02 2021-06-03 Exel Industries Electrostatic rotary projector for coating product, spraying installation comprising such a projector and coating method using such a projector

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5039019A (en) * 1990-08-01 1991-08-13 Illinois Tool Works, Inc. Indirect charging electrostatic coating apparatus
US20080006726A1 (en) * 2004-12-28 2008-01-10 Ransburg Industrial Finishing K.K. Electrostatic Paint Sprayer
US20210162433A1 (en) * 2019-12-02 2021-06-03 Exel Industries Electrostatic rotary projector for coating product, spraying installation comprising such a projector and coating method using such a projector

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