• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Electrostatic coating apparatus comprises a high tension charging electrode (1) arranged inside the apparatus, insulated from the outer environment and directly contacting the coating material passing through the apparatus in a feed channel (6), an auxiliary electrode (4), separated from the coating material by a thin layer (5) of insulating material, of opposite polarity in relation to the charging electrode (1) and an outlet aperture (9) for the coating material. The high tension charging electrode (1) is at least partly axially offset in relation to the position of the auxiliary electrode (4). A centrally arranged needle electrode (10) extends through the aperture (9) for accumulating electrostatic charges and transferring them beyond the aperture (9) into the outer environment, thus possessing a free potential. It is insulated from both of the charging electrode (1) and the auxiliary electrode (4) by being embedded into an insulating material (8). <IMAGE>
    公开号:SU1097183A3
    申请号:SU813344970
    申请日:1981-10-15
    公开日:1984-06-07
    发明作者:Тот Йожеф；Бенедек Дьердь
    申请人:"Эдьетертеш" Мезегаздашаги Термелесеветкезет (Инопредприятие)；
    IPC主号:
    专利说明:

    2. The device according to claim 1, characterized in that the area of the charging electrode, covered by a grounded electrode, is covered with a layer of insulating material.
    3. The device according to claim 1, characterized in that it is provided with a central core of semiconducting material having a diameter equal to the diameter of the charging electrode and placed in the feed material channel of the coating between the outlet opening and the charging electrode coaxially with the latter.
    The invention relates to electrostatic spray coating equipment, preferably liquid materials, as well as powder materials. .
    A device for electrostatic coating is known, comprising a case of insulating material with a supply channel for the coating material and an outlet, a high-voltage charging electrode installed in the coating supply channel and a grounded electrode mounted in the housing wall and separated from the supply channel of the coating material by a layer insulating material. This device provides effective charging of the coating material with a resistivity of 2 10 - 840 S1; cm at a relatively low voltage supply of 6-30 kV 1J. .
    However, coating materials with almost ISOLATED properties (resistivity up to 10 cm) with a known device may not always be sufficiently charged, which can lead to uneven coating and material waste. .
    The purpose of the invention is the expansion of the technological capabilities of the device.
    To achieve this goal, an electrostatic coating device, comprising a body made of insulating material with a supply channel for the coating material and an outlet with a hole, a high-voltage charging electrode installed in the supply channel of the coating material, and a grounded electrode mounted in the wall of the housing and separated from the feed channel of the coating material with a layer of insulating material, provided with a coaxially arranged needle electrode in the outlet part of the feed channel coating material vtusknogo openings of the housing and electrically isolated from the charge and the grounded electrodes and / or the end of the charging electrode opposite vtusknomu hole located on the feeding direction of the coating material before the respective end of the ground electrode.
    In addition, the area of charge
    an electrode covered by a grounded electrode is covered with a layer of insulating material.
    The device can also be equipped with a central core of semiconductor material having a diameter equal to the diameter of the charging electrode, and placed in the channel of the supply of the coating material between the outlet hole and the charging electrode coaxially with the latter.
    Placing the end of the charging electrode opposite the outlet orifice before the corresponding end of the grounded electrode in the direction of supply of the coating material provides a preliminary effective contact charge of the material on the charging electrode and the absence of deposition of the formed charges on the charging electrode, which will increase the specific charge of the outgoing coating material devices.
    The presence of the needle electrode provides an additional charge of the material particles after they exit the outlet, which also contributes to an increase in the specific charge of the material. FIG. 1 schematically shows a device, an axial section; Figure 25 shows the front (charge) part of the device; cut (options for). The device for electrostatic coating comprises a housing 1 of insulating material with a channel 2 for feeding the coating material, an outlet 3 and an annular channel 4 for air flow with an air nozzle. A high voltage charging electrode 5, connected by a cable 6 with a voltage source 7, is installed in the channel 2 of the material supply. A grounded electrode 8 is mounted in the wall of the housing 1, covering the material supply channel 2 and separated from the latter by a layer of insulating material 9. The end of the charging electrode 5 opposite to the outlet 3 is located in the feed direction of the coating material before the corresponding end of the grounded electrode 8 A dosing device 10, a hose 11 and a channel 13 located in the handle 12 and a valve 1A associated with the start lever 15 are provided in the channel 2. The channel 12 is provided with air in the channel 12 16 and the air valve 17, also associated with the starting lever 15, the charging electrode 5 (according to the embodiment of FIG. 2 / is made in the form of a ring mounted on the walls of the material supply channel 2 and axially biased so that the grounded electrode 8 is not The core 1 of the insulation core is mounted along the axis of the housing 1 (jo of the material, reaching almost the outlet opening 3 with the end and forming the KOLEN wall with the walls of the channel 2 for the passage of material through the roof). The device can be equipped with a needle electrode 19, protruding from the outlet 3 of the housing 1 and electrically isolated from the charging 5 and grounded 8 electrodes. The needle electrode (according to the embodiment of the device according to FIG. 3) is mounted on the end of the central core 18 by means of a metal ring 20. The needle electrode 19 is made of electrically conductive or semiconducting material. Compared with FIGS. 2 and 3, the charging electrode (in the embodiment According to Fig. A) it is made in the form of a solid rod installed in channel 2 along its axis, with the part of the electrode 5 facing the outlet 3, covered by the grounded electrode 8, smaller than the diameter and covered with a layer of the insulating material 21. The insulating material covers the end of the electrode 5. The needle electrode 19 is fixed in it. The device is equipped with a central core 22 of semiconducting material having a diameter equal to the charging diameter of the electrode and placed in the coating material channel 2 between the outlet and the charging electrode 5 coaxially with the latter. The central core 22 is connected by a charging electrode 5 in the form of a solid rod. At the free end of the core 12, by means of a rod 23 of insulating material, a needle electrode 19 is mounted (Fig. 5). The charging electrode can be made in the form of a solid Rod mounted along the axis of the channel 2 and connected to the central core 18 of insulating material, on the end of which a needle electrode 19 is mounted (Fig. 1). The device works as follows. When the start lever 15 is pressed, the coating material is supplied from the metering device 10 (or the pressure tank a) through the hose 11, the channel 13 in the handle 12 and the valve 14 to the channel 2. supplying material in the housing 1 and in contact with the charging electrode 5. receives a contact charge. Then the material enters the annular gap between the walls of the channel 2 and the central core 18 (either the central core 22 (Fig. 5), or a portion of the charging electrode, covered with an insulating material layer 21 of Fig. 4). In this gap, the material receives a strong charge, which under the action of the grounded electrode 8 settles near the walls of the channel 2, and a high charge density is created. The charged material exits through the outlet 3 and is sprayed with compressed air, which is also supplied when the start lever 15 is pressed through the channel 16, through the valve 17 through the supply channel L of the air to the air nozzle. A grounded electrode 8 removes charges to the ground that form on its surface due to eectrostatic induction. In the case of the presence of needle-like electrolyte .19, the latter collects a portion of the charge of the material of the coating located in front of the outlet 3, and carries it out of the outlet, where this charge is transferred by the particles of the pre-charged air-sprayed material, which provides more efficient charging of material. The efficiency of the field between charging 5 and grounded 8 electrodes can be increased if the section of charging electrode 5 covered by grounded electrode 8 is extended to the outlet 3 and covered with a layer of insulating material, or if the device is provided with a central core 22 of semiconducting material . These embodiments of the device increase individually or in combination with each other the charge of the material being sprayed: depending on its resistivity, and with a low resistivity of 10 3. AI increases in charge in percentage terms less, and at high rates. For example, during experiments with a varnish of 23 S in accordance with the norms of Din 4 at a flow rate of about 300 cm / min, air depressions of 3 bar and a distance of 25 cm from the outlet of the housing of the body state an increase in the specific charge of 40% for a varnish with a specific resistance of cm , 60% for a varnish with a specific resistivity of cm and 70% for a varnish with a specific resistance, see. The sprayed and charged material under the action of electrostatic attraction by a grounded product 24 is uniformly deposited on it, including on the surface opposite to nor cover. Removing the high-voltage electrode from the outlet eliminates the risk of sparking if the material flow is cut off and the research institute has an outlet of the housing with the product, which increases the reliability of the device. The use of the proposed device allows to increase the specific charge of sprayed coating materials, including those with poor electrical conductivity or with almost insulating properties.
    FIG. 2
    权利要求:
    Claims (3)
    [1]
    1. DEVICE FOR ELECTROSTATIC COATING, • containing a body of insulating material with a feed channel for the coating material and an outlet, a high-voltage charging electrode, an
    Fie. 7 mounted in the feed channel of the coating material, and a grounded electrode mounted in the wall of the housing and separated from the feed channel of the coating material by a layer of insulating material, characterized in that. in order to expand technological capabilities, it is equipped with a needle electrode coaxially placed in the output part of the coating material supply channel, protruding from the outlet of the housing and electrically isolated from the charging and grounded electrodes, and / or the opposite end of the charging electrode. an outlet located in the direction of supply of the coating material in front of the corresponding end of the grounded electrode.
    SU sh. 1097183
    [2]
    2. The device is non. 1, characterized in that the portion of the charging electrode covered by the grounded electrode is covered with a layer of insulating material.
    [3]
    3. The device according to claim 1, characterized in that it is provided with a central core of semi-conductive material having a diameter equal to the diameter of the charging electrode and placed in the channel for supplying the coating material between the outlet and the charging electrode coaxially with the latter.
    类似技术:
    公开号 | 公开日 | 专利标题
    KR950007468B1|1995-07-11|Electrostatic spraying
    US3735925A|1973-05-29|Method and device for electrostatic spraying of material
    JP3763893B2|2006-04-05|Electrostatic spraying equipment
    US4579279A|1986-04-01|Electrostatic sprayers
    US3009441A|1961-11-21|Apparatus for electrostatically spray coating
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    GB793298A|1958-04-16|Improvements in electrostatic spray coating apparatus
    GB749008A|1956-05-16|Improvements in or relating to spray coating of articles and apparatus for use in connection therewith
    US2901177A|1959-08-25|Spraying apparatus
    JPH0699108A|1994-04-12|Coating material distributing device
    SE8704309L|1989-05-05|DEVICE FOR INSULATING THE SPRAY MATERIAL CELLRATIVELY RELATIVE HAGGING VOLTAGE OF AN ELECTROSTATIC SPRAY SYSTEM
    JP2008119557A|2008-05-29|External charging type electrostatic coating gun equipped with external electrode
    US3049301A|1962-08-14|Electrostatic spraying of atomized material
    US4548363A|1985-10-22|Muzzle for electrostatic spray gun
    CA1259483A|1989-09-19|Apparatus for electrostatic coating of objects
    US4788617A|1988-11-29|Liquid transfer apparatus
    GB865763A|1961-04-19|Improvements in or relating to apparatus for electrostatically depositing liquid coating material
    JP2004055317A|2004-02-19|Nozzle type static eliminator
    RU2067894C1|1996-10-20|Electrostatic sprayer
    CA2341186C|2005-05-03|Electrode holder for a powder spray gun
    SU1007745A1|1983-03-30|Electrostatic sprayer
    SU725714A1|1980-04-05|Centrifugal electrostatic sprayer
    SU601054A1|1978-04-05|Sprayer for applying pulverulent materials
    EP0230723A2|1987-08-05|Powder charging apparatus and electrostatic powder coating apparatus
    JPS60202757A|1985-10-14|Control device for wet process electrical dust precipitator
    同族专利:
    公开号 | 公开日
    GB2096022B|1984-08-30|
    HU181198B|1983-06-28|
    GB2096022A|1982-10-13|
    FR2491783A1|1982-04-16|
    DE3138671C2|1986-07-31|
    DE3138671A1|1982-06-09|
    FR2491783B1|1987-03-20|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3219013A|1962-05-04|1965-11-23|Gen Motors Corp|Precharging device for electrostatic painting apparatus|
    DE2059594C3|1970-07-31|1973-09-20|Hajtomue Es Felvonogyar, Budapest|Device for the electrostatic dusting of dyes, powders, fibers and the like|
    DE2555547C3|1975-12-10|1983-06-09|Hajtómüvek és Festöberendezések Gyára, Budapest|Device for the electrostatic application or spraying of material particles|
    HU173207B|1976-11-10|1979-03-28|Hajtomuevek Es Festoekeszuelek|Rotary head paint sprayer with multi-layer electrode|GB2205052A|1987-05-20|1988-11-30|Silvan Pumps & Sprayers Pty|Electrostatic sprayer|
    DE4433113C2|1994-09-16|1998-12-17|Wagner Int|Device for charging and dispensing electrically conductive spray material|
    US5518546A|1994-10-05|1996-05-21|Enexus Corporation|Apparatus for coating substrates with inductively charged resinous powder particles|
    WO2002026390A1|2000-09-29|2002-04-04|Graco Minnesota Inc.|Low voltage electrostatic charging|
    DE10151286A1|2001-10-22|2003-04-30|Tesa Ag|coating process|
    FR2950545B1|2009-09-29|2012-11-30|Centre Nat Rech Scient|DEVICE AND METHOD FOR ELECTROSTATIC PROJECTION OF A LIQUID, FUEL INJECTOR INCORPORATING THIS DEVICE AND USES THEREOF|
    CN110042337B|2019-05-28|2020-12-25|沈阳理工大学|Argon protection microbeam electric arc spraying gun|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    HU249880A|HU181198B|1980-10-15|1980-10-15|Electroacoustic paint sprayer|
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