Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B14/00—Arrangements for collecting, re-using or eliminating excess spraying material
  • B05B14/40—Arrangements for collecting, re-using or eliminating excess spraying material for use in spray booths
  • B05B14/41—Arrangements for collecting, re-using or eliminating excess spraying material for use in spray booths by cleaning the walls of the booth
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B14/00—Arrangements for collecting, re-using or eliminating excess spraying material
  • B05B14/40—Arrangements for collecting, re-using or eliminating excess spraying material for use in spray booths
  • B05B14/41—Arrangements for collecting, re-using or eliminating excess spraying material for use in spray booths by cleaning the walls of the booth
  • B05B14/412—Arrangements for collecting, re-using or eliminating excess spraying material for use in spray booths by cleaning the walls of the booth wherein the walls of the booth is perforated or porous walls and the walls are cleaned of or prevented from being contacted with excess material by a flow of fluid, e.g. air or water, directed into the booth
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B14/00—Arrangements for collecting, re-using or eliminating excess spraying material
  • B05B14/40—Arrangements for collecting, re-using or eliminating excess spraying material for use in spray booths
  • B05B14/42—Arrangements for collecting, re-using or eliminating excess spraying material for use in spray booths using electrostatic means
• • 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
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
  • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
  • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

Definitions

• This invention relates to a spraybooth spraychamber or enclosure in which the application of dry powder materials for the coating of surfaces is carried out for example by electrostatic coating means.
• oversprayed powder material is encouraged by means of externally induced air movement to be removed from the interior of the spraybooth or spraychamber so that it may be re-used subsequently-
• One of the claimed advantages for the application of dry powder materials in coating processes is the ability to recover the over ⁇ sprayed materials for re-use. In order to realise such advantage fully it is necessary to recover such oversprayed materials each from the other without such materials having become cross contaminated. It is necessary therefore and desirable that each material be applied separately and that when it is desired to change from one material or one colour of material to another such change is carried out efficiently.
• the design of the interior sections of the spraybooth may be such as to provide for such sections upon which th oversprayed powder material may come to rest to be at such angle fro the horizontal plane as to cause all but the minimum of such over ⁇ sprayed materials to fall into the exhaust ventilation ducting and t be removed from the interior of the spraybooth.
• the structure of the spraybooth spraychamber or enclosure may be execute in plastic or similar dielectric material so as to reduce the availa alternative electrical earth attraction which a metal or otherwise electrically conductive spraybooth structure may present to that of the primary electrical earth attraction presented to the charged particles of powder by the articles being coated.
• the present invention has for its object to provide improved means for the reduction of attraction and -retention of oversprayed powder materials upon the interior surfaces of a spraybooth spraychamber or
• Such means preferably comprise an interior surface which is fabricated in whole or in part from materials having a degree of porosity which will permit the movement of gaseous materials to be induced through
• Figure 1 is a schematic side elevational view of an electrostatic powder coating installation operating according to a' conveyorised throughpass technique.
• Figure 2 is a schematic- cross sectional view through an electrostat powder coating installation operating according to a
• FIG. 1 is a schematic side elevational sectional view through an electrostatic powder coating installation operating accord to a conveyorised throughpass technique taken substantiall
• FIG. 1 illustrating an installation or apparatus 10 depicted in Figure 2 the installation will be understood to poss a spraybooth spraychamber or enclosure 11 in the form of a lengthwi extending tunnel, the roof section 11a of which possesses a lengthw
• the spraybooth spraychamber or enclosure 26 is supported upon base section 25 and consists substantially of a structure having an exte non-porous surface 24 separated from an interior porous surface 23 s as to form a space or plenum chamber into which gaseous material ma be introduced by means of suitably positioned inlet connections 27.
• the gaseous materials thus introduced pass through the interior porous surface 23 substantially in the direction indicated by lines 28 and prevent oversprayed powder materials which have not become attached to the articles being coated 15 from becoming deposited upon the interior surfaces of the spraybooth spraychamber or enclosure 23 and assist in transporting such oversprayed powder materials so that they become influenced in the direction indicated by lines 29 and 30 by the ventilating forces created by motorised fan 34 of the dust collecting device 35 and removed from the interior of the spraybooth spraychamber or enclosure 11 through ventilation duct 36.
• a multiplicity of discharge electrodes 33 are positioned in the plenum chamber formed between the Interior surfaces 23 and the exterior surfaces 24 and supplied with high voltage through cable 32 from a power supply 31. Best mode of carrying out the invention
• the invention may be carried into practice in various ways, but the following may be instanced as a convenient practical arrangement of the spraybooth spraychamber or enclosure according to the invention.
• the interior surface having a de ree of porosity is so positioned in relation to the exterior surface of the spraybooth spraychamber or enclosure as to provide a plenum.
• Another convenient practical arrangement for the spraybooth spraychamber or.enclosure according to the present invention would be for a multiplicity of electrical discharge electrodes to be positioned within the plenum formed by the interior and exterior surfaces of the structure and connected to a source of high voltage so that the gaseous material passing into the interior of the spraybooth spraychamber or enclosure becomes ionised with a like polarity of charge to that of the powder materials being employed in the coating process providing further repulsion of the oversprayed powder material from the interior surfaces of the spraybooth spray- chamber or enclosure by means of an electro-magnetic nature. • 195 The multiple discharge electrodes being within the plenum thus reducing the possibility of spark discharge between such electrode and the earthed workpieces or articles being coated.

Landscapes

• Electrostatic Spraying Apparatus (AREA)
• Application Of Or Painting With Fluid Materials (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=9701387

Family Applications (1)

Country Status (3)

Families Citing this family (12)

Family Cites Families (7)

• 1978
  • 1978-01-05 GB GB269/78A patent/GB1588503A/en not_active Expired
  • 1978-10-02 WO PCT/GB1978/000017 patent/WO1979000478A1/en unknown
• 1979
  • 1979-07-30 EP EP78900198A patent/EP0007370A1/de not_active Withdrawn

Non-Patent Citations (1)

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