EP3703865A1 - Isolationseinrichtung sowie beschichtungssystem hiermit - Google Patents
Isolationseinrichtung sowie beschichtungssystem hiermitInfo
- Publication number
- EP3703865A1 EP3703865A1 EP18721358.2A EP18721358A EP3703865A1 EP 3703865 A1 EP3703865 A1 EP 3703865A1 EP 18721358 A EP18721358 A EP 18721358A EP 3703865 A1 EP3703865 A1 EP 3703865A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- coating
- base body
- channel
- coating system
- wall
- 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.)
- Withdrawn
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
- B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
- B05B12/14—Arrangements for controlling delivery; Arrangements for controlling the spray area for supplying a selected one of a plurality of liquids or other fluent materials or several in selected proportions to a spray apparatus, e.g. to a single spray outlet
- B05B12/1481—Arrangements for controlling delivery; Arrangements for controlling the spray area for supplying a selected one of a plurality of liquids or other fluent materials or several in selected proportions to a spray apparatus, e.g. to a single spray outlet comprising pigs, i.e. movable elements sealingly received in supply pipes, for separating different fluids, e.g. liquid coating materials from solvent or air
-
- 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
- B05B5/1616—Arrangements for supplying liquids or other fluent material the liquid or other fluent material being electrically conductive and the arrangement comprising means for insulating a grounded material source from high voltage applied to the material
- B05B5/1625—Arrangements for supplying liquids or other fluent material the liquid or other fluent material being electrically conductive and the arrangement comprising means for insulating a grounded material source from high voltage applied to the material the insulating means comprising an intermediate container alternately connected to the grounded material source for filling, and then disconnected and electrically insulated therefrom
- B05B5/1633—Arrangements for supplying liquids or other fluent material the liquid or other fluent material being electrically conductive and the arrangement comprising means for insulating a grounded material source from high voltage applied to the material the insulating means comprising an intermediate container alternately connected to the grounded material source for filling, and then disconnected and electrically insulated therefrom the arrangement comprising several supply lines arranged in parallel, each comprising such an intermediate container
-
- 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
- B05B5/025—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
Definitions
- the invention relates to an insulation device and a coating system for coating objects, wherein the coating system comprises an electrostatically operating application device with a dispensing device, by means of which a coating material can be dispensed, and at least one reservoir for coating material, via an inlet line with an input valve means and over a supply line is connected to the dispensing device.
- the coating system comprises an electrostatically operating application device with a dispensing device, by means of which a coating material can be dispensed, and at least one reservoir for coating material, via an inlet line with an input valve means and over a supply line is connected to the dispensing device.
- Such coating systems for example, in the automotive industry, articles such as vehicle bodies or body parts are coated with the aid of the electrostatically operating application device.
- the coating material for example a lacquer
- the coating material is dispensed by the dispenser and exposed to an electric field. In the electric field, the dispensed coating material is ionized and transported by means of electrostatic forces to the object to be coated.
- the object is at ground potential.
- Such an application device may be, for example, a high-rotation atomizer, in which the delivery device comprises a rotating bell cup, from which smallest droplets of paint are thrown off. The resulting paint mist is ionized in the electric field and thereby transported to the object to be coated.
- the input valve device in practice, for example, it may be a color changer which is fed from ring lines with different media. If, for example, the color shade is changed between two coating operations, the dispenser must be supplied with another coating material. In order to be able to carry out such a color change in a time-efficient manner, two supply lines are frequently provided in modern coating systems. Thus, during a coating operation, the application device can be fed from a supply line with a first coating material and at the same time a second supply line can be prepared with a second coating material. This reduces the color change time.
- the above-mentioned isolation device which has a channel for a movable in the channel Räumscale.
- the coating material can be supplied to the application device via the channel. After a coating process, the channel can be cleaned again for potential separation by means of the broaching body.
- the coating system for coating objects for which the insulation device is designed, has an electrostatically operating application device with a dispensing device, by means of which a coating material can be dispensed. Furthermore, the coating system has at least one reservoir for a coating material, which is connected via an inlet line to an input valve device and via a supply line to the dispenser.
- the insulation device comprises a base body of an electrically insulating material with a channel for a movable in the channel Räumelasticity.
- the channel has an inner wall, along which the Räum stresses is movable along.
- the reaming body also comprises an electrically insulating material and is movable between a parking position and an isolation position such that the inner wall is freed from material to form an electrical insulation path between the storage container and the input valve device.
- the inner wall comprises a vitreous material.
- the vitreous material may be, for example, a glass, a ceramic or / and a composite of a binder and a farinaceous mineral constituent such as stone or granite.
- the glassy material of the inner wall provides an extremely smooth and hard surface and thus allows a low coefficient of friction between the Räum stresses and the inner wall. This, on the one hand, improves the removal of coating material adhering thereto, improves the rinsability and reduces the wear which occurs due to the movement of the reaming body along the inner wall.
- the channel has a glass element forming the inner wall.
- the term glass element is intended here and below to refer to an element which has a vitreous material in the sense of the above description - glass, ceramic, composite material, etc. - with corresponding surface properties.
- the element may be a one-piece element.
- the glass element can also be constructed from two or more individual elements.
- the advantage of a glass element is that the glass element can be optimized in terms of its surface and insulating properties separately from the body. In particular, the vitreous material offers low surface friction and high electrical insulation.
- the one or more glass elements can be manufactured separately from the base body and so also other manufacturing techniques, such as curing, be subjected to the base body.
- the glass element is connected to the base body by means of a potting material.
- a potting material can advantageously firmly connect the base body with the one or more glass elements and at the same time maintain or support the electrical insulation / electrical isolation.
- the potting material may comprise a polyurethane resin.
- a PU resin With a PU resin, the requirements for strength, electrical insulation and encapsulation behavior can be met.
- the glass element has a longitudinal axis along which the broaching body moves. This allows a close contact between the Räum stresses and the inner wall with the glassy material and as a result a good Räum qualifi with a good cleaning effect.
- the potential separation takes place between the two ends of the longitudinal axis of the glass element through.
- the longitudinal axis may be partially straight or curved.
- the glass element laterally adjacent to the longitudinal axis has connection openings for the passage of fluids, which are connected to lines within the body.
- a fluid so for example, a liquid or a gas, controlled by the body, are introduced or discharged into the glass element.
- corresponding lines, valves, connections, etc. may be provided in the base body.
- seals may be provided in the body for the connection of the one or more glass elements.
- the coating system for coating objects comprises an electrostatically operating application device with a dispensing device, with Tels which a coating material can be delivered. Furthermore, the coating system comprises at least one reservoir for coating material which is connected via an inlet line to an input valve device and via a supply line to the dispenser. According to the invention, it is provided that the coating system comprises an insulation device as described above.
- the method according to the invention for producing an insulation device for a coating system for coating objects comprising an electrostatically operating application device with a dispensing device, by means of which a coating material can be dispensed, and at least one reservoir for coating material, which has an inlet line with an inlet - Valve means and is connected via a supply line to the dispensing means, and wherein the insulating means is adapted to form an electrical isolation path between the storage container and the input valve means comprises the steps of: providing a base body made of an electrically insulating material; Providing an element having a glassy inner wall; Inserting the element into the body; Introducing a potting compound between the base body and the element; Curing the potting compound.
- the base body has at least one line for a fluid and the step of inserting the element comprises introducing at least one retaining element into a line such that the retaining element effects a fixation of the element on the base body.
- the line of the main body can be, for example, a line for a coating fluid, a cleaning fluid such as, for example, a flushing fluid or compressed air or the like.
- the retaining element in such a line directly or in a corresponding bore, which is provided for example for a valve or only for the purpose of pouring the element, are used.
- the retaining element at least partially penetrate into the element, in particular into a channel formed by the inner wall.
- Figure 1 is a schematic representation of a coating system with insulation means according to the invention
- Figure 2 is a longitudinal section
- FIG. 3 shows a cross section through a first embodiment of an insulation device according to the invention
- Figures 4-6 are longitudinal sections of various stages in the manufacture of an insulating device according to the invention.
- FIG. 7 shows a cross-sectional detail view of a first variant
- Figure 8 is a cross-sectional view of a second variant for forming a sealing connection between the base body and the glass element.
- Figure 1 shows a schematic representation of a coating system 10 for coating objects, such as vehicle bodies or attachments thereof, which are not specifically shown.
- the coating system 10 comprises an electrostatically operating application device 12 which is shown only schematically and which, in the exemplary embodiment shown in FIG. 1, is designed as a high-rotation atomizer 14 with a rotating bell cup 16.
- the application device 12 comprises a dispensing line 18, via which coating material can be dispensed onto an object.
- a dispensing line 18 via which coating material can be dispensed onto an object.
- the bell cup 16 and the discharge line 18 thus form a dispenser 19th
- the application device 12 can optionally be supplied with coating material from two supply lines 20, 21.
- a first supply line 20 and a structurally identical second supply line 21 are provided. Both supply lines 20, 21 extend between an input valve device 22 and an output valve device 24.
- the input valve device 22 is formed in the embodiment shown in Figure 1 as a color changer 26, which can be fed from ring lines 28 with different media.
- the input valve device 22 is also connected to a working line 30, via which a working fluid such as compressed air or a rinsing agent can be supplied.
- the working line 30 can simultaneously serve as a disposal line for the discharge of material from the system. Alternatively, this can also be provided for a separate disposal line.
- the working line 30 may be connected to a non-specifically shown valve device which can connect the working line 30 with a compressed air source, a flushing agent source and / or an outlet. If subsequently other lines are referred to as working line, they fulfill the same purpose and are connected as required with a corresponding valve device and material sources and an outlet.
- the input valve device 22 can - as shown in Figure 1 - be formed in one piece. In a modification, a separate input valve device or even smaller-sized split input valve devices are conceivable for each supply line.
- Each supply line 20, 21 comprises a feed tank 32, 33 in the form of a piston metering meter 34, 35, from which the application device 12 can be fed via a supply line 36, 37.
- the piston dispenser 34, 35 illustrates only one example of a reservoir 32, 33 for coating material.
- the discharge line 18 is provided with an output valve device 24, in which also the respective supply line 36, 37 of each supply line 20, 21 opens.
- the output valve means 24 may also be connected to Facultylei lines 38 for compressed air / detergent / disposal and has to control the various lines and lying within the output valve means 24 line sections according to associated valves.
- an insulation device 100, 101 is provided between the reservoirs 32, 33, in particular the piston dosers 34, 35, on the one hand, and the application device 12, on the other hand.
- each insulation device 100, 101 is connected to the application device 12 via the respective supply line 36, 37 and via a respective coating material discharge line 52, 53 to the respective piston dispenser 34, 35 and via an inlet line 48, 49 connected to the color changer 26.
- the isolation devices 100, 101 have in addition to the aforementioned connections each further connections to working lines and / or lines for insulation media such as air, ester or vegetable oils.
- Such an isolation device 100, 101 may form a structural unit with the respective piston dispenser 34, 35 and optionally with an associated dispenser-valve unit.
- isolation device 100 To simplify the description, only the isolation device 100 will be discussed in detail below. However, the statements apply mutatis mutandis to the second isolation device 101.
- the isolation device 100 comprises a reaming body 102, which can be moved back and forth in a channel 104 with an inner wall 106 along a movement direction X.
- the broaching body 102 is shown in the figure 1 in a sectional view.
- the channel 104 has different cross sections along the direction of movement X 2.
- other size ratios than those shown in FIG. 1 may be provided.
- the broaching body 102 is made of an electrically insulating material and has a substantially cylindrical basic shape along its direction of movement X in the embodiment shown in FIG. 1, which can be divided into an insulating section and a line section as seen along the direction of movement X one behind the other.
- the outer geometry of the broaching body 102 and the internal geometry of the respective region 110, 112 of the channel 104 are designed to be complementary at least in sections.
- any suitable complementary basic shape is conceivable, which can be moved along the direction of movement X of the broaching body 102 along a certain distance against each other.
- Figures 2 and 3 show a longitudinal section and a cross section through a first embodiment of the isolation device 100 according to the invention.
- Figure 2 shows a longitudinal section along the movement axis X
- Figure 3 is a section perpendicular to the movement axis X.
- the embodiment shown in Figures 2 and 3 is strong schematically. Any cross-sectional changes or other geometric adjustments that may be necessary for a function of the broaching body 102 are not shown in FIGS. 2 and 3 for reasons of clarity.
- the insulation device 100 has a main body 120.
- the base body 120 may be made of a plastic having good electrical insulation properties.
- the base body 120 is shown in the present embodiment as a cuboid, but may of course take any other suitable form.
- a glass element 122 is arranged along the movement axis X of the broaching body 102, which forms the channel 104 for the broaching body 102.
- the glass element 122 is formed in one piece in the present embodiment and can be arranged after its production in a recess 124 in the base body 120.
- the glass element 122 may be made entirely of a suitable glass. Alternatively, only essential components of the glass element 122 may be made of glass or a vitreous material.
- the glassy material may, for example, a ceramic or a mixed material of a binder and a flour-like mineral constituent such as stone (granite).
- the glassy material significantly improves the sliding properties for the Räumanalysis 102 in the channel 104.
- the Räumintelligence 102 slides along an inner wall 126 of the glass element 122.
- the glass element 122 is formed for this purpose in its basic structure as a hollow cylinder.
- the inner surface of the hollow cylinder forms the inner wall 126.
- the outer surface of the hollow cylinder communicates with the recess 124 in the base body 120 in connection.
- the glass element 122 represents an improvement in terms of high-voltage insulation.
- the fluid flowing along the inner wall 126 is conductive and residual amounts possibly adhering to the inner wall can increase the conductivity, a high Initial value in the electrical insulation of advantage.
- the low coefficients of friction associated with the vitreous material at the same time increase the wear resistance and the flushability of the channel 104 forming inside the inner wall 126.
- the glass element 122 and the base 120 are connected in the embodiment shown with a potting material 128 such as a polyurethane resin.
- the potting material 128 fills the gap between the base body 120 and the glass element 122, more precisely between the outer surface 125 of the glass element 122 and the inner surface of the recess 124 of the base body 120.
- the potting material 128 may be cured, for example, thermally, chemically, by means of radiation, such as UV radiation, or by a combination of the methods mentioned.
- no change in volume or only a small change in volume of the potting material 128 takes place during the curing process.
- lateral recesses 130 are provided in the base body 120.
- valves 132 are used, which control a flow of a medium into the channel 104.
- the recesses 130 open into an inflow channel. or inflow space 134, which is in fluid communication with the channel 104 in the glass element 122 via openings 136.
- the connection between the inflow channel 134 of the main body 120 and the opening 136 of the glass element 122 is controlled via a valve tappet 138 of the valve 132.
- the tappet 138 may be urged against the opening 136 of the glass element 122 and may thus prevent overflow of fluid from the inflow region 134 through the opening 136 into the channel 104 and vice versa due to its shape.
- channels 140 are provided for an inflow of such fluid, of which one is schematically indicated in Figure 3.
- FIG. 4 shows, in a first step, the provision of a main body 120.
- the main body 120 has a central recess 124 and lateral recesses 130.
- a glass element 122 is provided and inserted into the central recess 124.
- the glass element 122 has openings 136.
- blind plugs 142 are inserted, which are designed so that they completely fill the side recesses 130 including the inflow channel 134 and at the same time through the openings 136 and thus through the inner wall 126 into the channel 104 protrude.
- the glass element 122 is fixed relative to the base body 120.
- the openings 136 and the inflow channels 134 are closed, so that a closed volume is created for the potting compound 128.
- FIG. 6 shows the situation after the introduction of the potting material 128.
- the potting material 128 has closed the intermediate space between the glass element 122 and the main body 120 and thus fixes the glass element 122 relative to the main body 120.
- FIGS. 7 and 8 show detail enlargements of FIG. 3 in a state corresponding to FIG. 6, that is to say after casting of the potting material 128.
- the potting material extends at least partially into the inflow channel 134 of the lateral recess 130 and can serve there, for example, already as a sealant and stop edge for the valve tappet 138.
- FIG. 8 shows an alternative embodiment to that shown in FIG. Due to the changed shape of the dummy plug 142, an overflow of the potting material 128 into the inflow channel 134 was prevented in this embodiment during potting.
- valve lifter 138 abuts directly against the opening 136 of the glass element 122 and sealing means must be provided accordingly at this point.
- the apertures 136 in the glass element 122 may already be provided during the fabrication of the glass element 122 or may be subsequently introduced therein, for example drilled.
Landscapes
- Electrostatic Spraying Apparatus (AREA)
- Coating Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102017111823.3A DE102017111823A1 (de) | 2017-05-30 | 2017-05-30 | Isolationseinrichtung sowie Beschichtungssystem hiermit |
PCT/EP2018/060933 WO2018219566A1 (de) | 2017-05-30 | 2018-04-27 | Isolationseinrichtung sowie beschichtungssystem hiermit |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3703865A1 true EP3703865A1 (de) | 2020-09-09 |
Family
ID=62091885
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18721358.2A Withdrawn EP3703865A1 (de) | 2017-05-30 | 2018-04-27 | Isolationseinrichtung sowie beschichtungssystem hiermit |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3703865A1 (de) |
DE (1) | DE102017111823A1 (de) |
WO (1) | WO2018219566A1 (de) |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2626855C2 (de) * | 1976-06-11 | 1978-06-08 | Siemens Ag, 1000 Berlin Und 8000 Muenchen | Isolierendes Bauteil für Hoch- |
DE19961271A1 (de) * | 1999-12-18 | 2001-07-05 | Duerr Systems Gmbh | Lackiereinrichtung |
DE10233633B4 (de) * | 2002-07-24 | 2005-09-01 | Dürr Systems GmbH | Vorrichtung zum Dosieren oder Fördern eines auf Hochspannungspotential aufgeladenen Beschichtungsmittels in einer Beschichtungsanlage |
DE10239516A1 (de) * | 2002-08-28 | 2004-03-18 | Dürr Systems GmbH | Schlauch für die elektrostatische Beschichtung von Werkstücken |
JP4614802B2 (ja) * | 2005-03-24 | 2011-01-19 | 株式会社大気社 | 塗料管路用絶縁装置、及び、それを用いた塗装装置 |
DE102005060959A1 (de) * | 2005-10-07 | 2007-04-19 | Dürr Systems GmbH | Beschichtungsmittel-Versorgungseinrichtung und zugehöriges Betriebsverfahren |
-
2017
- 2017-05-30 DE DE102017111823.3A patent/DE102017111823A1/de not_active Withdrawn
-
2018
- 2018-04-27 EP EP18721358.2A patent/EP3703865A1/de not_active Withdrawn
- 2018-04-27 WO PCT/EP2018/060933 patent/WO2018219566A1/de active Application Filing
Also Published As
Publication number | Publication date |
---|---|
WO2018219566A1 (de) | 2018-12-06 |
DE102017111823A1 (de) | 2018-12-06 |
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