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EP4559581A1 - Anneau d'air de moulage pour pulvérisateur rotatif et pulvérisateur rotatif avec anneau d'air de moulage - Google Patents

Anneau d'air de moulage pour pulvérisateur rotatif et pulvérisateur rotatif avec anneau d'air de moulage Download PDF

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Publication number
EP4559581A1
EP4559581A1 EP23211933.9A EP23211933A EP4559581A1 EP 4559581 A1 EP4559581 A1 EP 4559581A1 EP 23211933 A EP23211933 A EP 23211933A EP 4559581 A1 EP4559581 A1 EP 4559581A1
Authority
EP
European Patent Office
Prior art keywords
air
shaping
outlet opening
channel
shaping air
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.)
Pending
Application number
EP23211933.9A
Other languages
German (de)
English (en)
Inventor
Nico Jud
Thomas Kluser
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
J Wagner GmbH
Original Assignee
Wagner International AG
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 Wagner International AG filed Critical Wagner International AG
Priority to EP23211933.9A priority Critical patent/EP4559581A1/fr
Priority to PCT/EP2024/081822 priority patent/WO2025108745A1/fr
Publication of EP4559581A1 publication Critical patent/EP4559581A1/fr
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B3/00—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
    • B05B3/02—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements
    • B05B3/10—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member
    • B05B3/1092—Means for supplying shaping gas
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B3/00—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
    • B05B3/02—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements
    • B05B3/10—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member
    • B05B3/1007—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member characterised by the rotating member
    • B05B3/1014—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member characterised by the rotating member with a spraying edge, e.g. like a cup or a bell
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B3/00—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
    • B05B3/02—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements
    • B05B3/10—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member
    • B05B3/1064—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member the liquid or other fluent material to be sprayed being axially supplied to the rotating member through a hollow rotating shaft

Definitions

  • the invention relates to a shaping air ring for a rotary atomizer and a rotary atomizer with a shaping air ring.
  • a rotary atomizer is typically used to coat workpieces with coating material and comprises a bell-shaped shaft and a bell-shaped plate arranged thereon. With the help of shaping air nozzles and the rotating bell-shaped plate, a fine, homogeneous spray jet is generated from the coating material, which is used to coat the workpiece.
  • a shaping air ring with numerous shaping air nozzles for a rotary atomizer is known.
  • the shaping air nozzles are arranged in a shaping air nozzle ring and aligned coaxially with the bell cup shaft.
  • the shaping air nozzles emit a shaping air stream forward coaxially with the bell cup shaft to form a spray jet emitted by the bell cup.
  • the shaping air nozzles aligned in the shaping air ring so that the center axis of the shaping air flow passes radially on the outside of the spray edge of the bell cup without touching the bell cup, whereby the radial distance between the center axis of the shaping air flow and the spray edge is approximately 3 mm.
  • the axial length of the bell cup is relatively short.
  • the ratio between the radius of the spray edge and the axial length of the outer surface of the bell cup is approximately 1.6.
  • the radius of the bell cup is therefore greater than its axial length.
  • the air consumption for the shaping air can be kept low because the outlets of the shaping air nozzles are located close to the spray edge.
  • this has the disadvantage that the individual air flows generated by the shaping air nozzles are still clearly recognizable as separate air flows at the spray edge. There is therefore no homogeneous shaping air flow at the spray edge. As a result, the trajectory of the individual paint droplets is influenced differently by the shaping air.
  • the shaping air nozzles in the shaping air ring are aligned so that the center axis of the shaping air flow impinges on the outer surface of the bell cup with a radial overlap of 2 mm.
  • the shaping air jet is therefore directed directly onto the outer surface of the bell cup.
  • the axial length of the bell cup is relatively large.
  • the axial extension of the outer surface is larger than the radius of the spray edge of the bell cup.
  • the individual paint droplets are influenced more uniformly in their trajectory by the shaping air than in the first embodiment.
  • the second embodiment has the disadvantage that the air consumption for the shaping air is greater than in the first embodiment because the outlets of the shaping air nozzles are further away from the spray edge.
  • An object of the invention is to provide a shaping air ring for a rotary atomizer with which both homogeneous shaping air can be provided and at the same time the compressed air consumption for generating the shaping air is minimized.
  • the paint droplets are influenced extremely evenly with the shaping air ring according to the invention.
  • the shaping air ring according to the invention for a rotary atomizer comprises annularly arranged shaping air nozzles, each having a nozzle channel.
  • the nozzle channel has a channel inlet opening and a channel outlet opening, wherein the channel outlet opening has an outlet opening height and an outlet opening width.
  • the Outlet opening width is larger than the outlet opening height.
  • the channel inlet opening has an inlet opening width, wherein the inlet opening width and the outlet opening width are of different sizes.
  • the inlet opening width is smaller than the outlet opening width.
  • the channel outlet opening has a cross-sectional area in the range of 0.3 mm 2 to 1.5 mm 2 .
  • the ratio of inlet opening width to outlet opening width is between 1 and 4.
  • the number of channel outlet openings in the molded air ring according to the invention is between 40 and 80.
  • the shaping air nozzles are designed and arranged in such a way that the Channel outlet openings of two adjacent shaping air nozzles touch.
  • axially extending webs are provided which delimit the nozzle channels.
  • the webs taper in the downstream direction. This has the advantage that the air streams expand and merge into a homogeneous overall air stream.
  • the shaping air ring according to the invention comprises an outer air guide ring and an inner air guide ring, which delimit the nozzle channels.
  • the molded air ring according to the invention is made of solvent-resistant plastic, aluminum or titanium.
  • a rotary atomizer in addition, includes the shaping air ring described above and a spray bell plate with a spray edge.
  • the nozzle channel is designed so that the shaping air jet generated by the shaping air nozzle is directed toward the spray edge. This prevents the air from bouncing off the bell plate. The coating material cloud is thus more concentrated.
  • the orientation of the shaping air jet on the edge has the advantage that the air acts directly where the atomization takes place and supports it.
  • the nozzle channel is designed so that the shaping air jet hits the spray bell plate between 0 and 3 mm before the spray edge. This results in a larger, less concentrated coating material cloud.
  • the nozzle channel is designed so that the shaping air jet does not touch the spray edge.
  • the distance between the spray edge and the shaping air jet is preferably between 0 and 3 mm. This results in a more concentrated coating material cloud.
  • air nozzles are arranged concentrically to the shaping air nozzles.
  • the shaping air nozzles and the air nozzles can be operated independently of each other.
  • FIG. 1 to 7 is a first possible embodiment of the forming air ring 1 according to the invention or parts of the forming air ring 1 according to the invention are shown.
  • the shaping air ring 1 comprises an outer air guide ring 11 and an inner air guide ring 12.
  • the outer air guide ring 11 and the inner air guide ring 12 are preferably designed such that the inner air guide ring 12 can be inserted into the outer air guide ring 11.
  • the outer air guide ring 11 can have a stop 11.1 on its inner side and the inner air guide ring 12 can have a stop 12.1 on its outer side.
  • the two air guide rings 11 and 12 are pushed together up to the two stops 11.1 and 12.1.
  • the outer air guide ring 11 is preferably arranged concentrically with the inner air guide ring 12.
  • the longitudinal axis L of the outer air guide ring 11 and the longitudinal axis L of the inner air guide ring 11 are congruent.
  • the outer air guide ring 11 has at its downstream end section a series of webs 6 which are arranged in a ring shape on the inside of the outer air guide ring 11.
  • the webs 6 can also be part of the inner air guide ring 12, as shown for example in Figure 12 is shown. In this case, in the assembled state, the inside of the downstream end section of the outer air guide ring 11 rests against the webs 6.
  • the outer air guide ring 11 has a groove 7 between each two webs 6. Two adjacent webs 6 form the left and right sides and the groove 7 between them forms the underside of a shaping air duct 8.
  • the upper side of the shaping air duct 8 is formed by the outer side of the inner air guide ring 12.
  • the shaping air duct 8 At its At its upstream end, the shaping air duct 8 has a duct inlet opening 9 and at its downstream end a duct outlet opening 10.
  • the shaping air duct 8 is also referred to below as the nozzle duct.
  • the outer side of the downstream end section 12.2 of the inner air guide ring 12 (nozzle wall 5.2) can have a smooth contour (see Figure 2 ).
  • the outer radius of the downstream end section 12.2 is then constant, at least in the area of the shaping air nozzles 5.
  • the channel outlet opening 10 at the downstream end of the nozzle channel 8 has an outlet opening height t2.
  • the outlet opening 5.1 of the shaping air nozzle 5 therefore has the outlet opening height t2.
  • the outer side of the downstream end section 12.2 may also have a wavy contour (similar to Figure 12 ).
  • the outer radius of the downstream end section 12.2 is then not constant, at least in the area of the shaping air nozzles 5.
  • the channel outlet opening 10 at the downstream end of the nozzle channel 8 has an outlet opening height t2'.
  • the outlet opening 5.1 of the shaping air nozzle 5 then has the outlet opening height t2'.
  • the outlet opening width a2 is greater than the outlet opening height t2 or t2'.
  • a shaping air nozzle 5 comprises the shaping air channel 8, the channel inlet opening 9, and the channel outlet opening 10.
  • the channel outlet opening 10 forms the outlet opening 5.1 of the shaping air nozzle 5, which is also referred to as the nozzle outlet 5.1.
  • a plurality, preferably 20 to 80, These shaping air nozzles 5 are arranged in a ring shape in the shaping air ring 1.
  • the number of shaping air nozzles can be smaller or larger.
  • a bell cup with a 30 mm diameter can be equipped with 30 shaping air nozzles.
  • a bell cup with a 70 mm diameter preferably has around 60 shaping air nozzles.
  • the shaping air nozzles 5 are preferably arranged in a nozzle ring. It is also advantageous if they are aligned coaxially with the longitudinal axis L.
  • the shaping air nozzles 5 are preferably arranged equidistantly.
  • the angle ⁇ (see Figure 4 ) between two adjacent shaping air nozzles 5 is thus constant between all adjacent shaping air nozzles.
  • the shaping air nozzles 5 ensure, among other things, that the paint particles are moved forward, i.e. towards the workpiece (not shown).
  • the webs 6 taper in the downstream direction.
  • the webs 6 each have the shape of a wedge, with the wedge tip located on the downstream side of the shaping air channel 8 and being blunt. Because the webs 6 taper in the downstream direction, the inlet opening widths a1 of the shaping air nozzles 5 are smaller than their outlet opening widths a2. As a result, the air flowing through the shaping air nozzles 5 is fanned out.
  • the webs 6 can also have a constant width over their entire length (not shown in the figures).
  • the inlet opening width a1 and the outlet opening width a2 are equal.
  • the channel length b8 of the nozzle channel 8 can be three to five times longer than its outlet opening width a2.
  • the longer nozzle channel 8 allows the shaping air jet to be directed even more precisely. Thus, it is possible to define even more precisely where the shaping air jet should hit the paint particles.
  • the length b8 of the nozzle channel 8 is three to five times longer than its inlet opening width a1.
  • the longer the nozzle channel 8 the greater its air resistance.
  • the shaping air jet can be aligned even more precisely thanks to the longer nozzle channel. This means that even more precise define where the shaping air jet should hit the paint particles.
  • the shaping air ring 1 according to the invention can also be equipped with additional air nozzles 4.
  • the additional air nozzles 4 primarily serve to concentrate the sprayed or to-be-sprayed particle stream.
  • the additional air nozzles 4 can be designed like the shaping air nozzles 5. This has the advantage that they are easy to clean.
  • each of the auxiliary air nozzles 4 has a longitudinal axis.
  • the longitudinal axes of the auxiliary air nozzles 4 are aligned parallel to the longitudinal axis L of the shaping air ring 1.
  • the angle of inclination at which the longitudinal axis of an auxiliary air nozzle 4 is inclined in the downstream direction toward the longitudinal axis L of the shaping air ring 1 is therefore 0°.
  • the longitudinal axes of the additional air nozzles 4 are inclined in the downstream direction towards the longitudinal axis L.
  • Such an embodiment is shown, for example, in Figure 10
  • This causes the shaping air jets 16 generated by the additional air nozzles 4 to be inclined in the downstream direction toward the longitudinal axis L.
  • the angle of inclination can, for example, be between 0° and 20°.
  • the angle of inclination influences the air flow at the spray edge 3.1 and also the air flow downstream of the spray edge 3.1.
  • the angle of inclination also has a Influence on the bundling of the coating material cloud and the possible air vortices that may arise.
  • the choice of inclination angle depends on the requirements to be met.
  • the inclination angle is usually one of several parameters. Other parameters may include the radial alignment to the spray edge and the design of the auxiliary air.
  • the additional air nozzles 4 are designed and/or arranged such that the air flowing through them is given a swirl (not shown in the figures).
  • the longitudinal axis of the additional air nozzle 4 is arranged laterally inclined (skew to the longitudinal axis LA).
  • the additional air nozzles 4 can be arranged laterally inclined for this purpose. This creates a swirl, and the air exiting the additional air nozzles 4 rotates along the longitudinal axis L. This is particularly advantageous when the coating material cloud is highly concentrated. Fewer undesirable turbulences form. This advantage is particularly evident when the rotary atomizer is arranged stationary.
  • downstream end of the inner air guide ring 12 is flush with the outer air guide ring 11, as shown for example in Figure 3 is shown.
  • the inner air guide ring 12 is not flush with the outer air guide ring 11, but is offset axially to the rear.
  • the dashed line t2" indicates the downstream end of the inner air guide ring 12. The dashed line t2" thus indicates the position of the downstream outer edge of the inner air guide ring 12.
  • the inner air guide ring 12 can also be axially offset forward (not shown in the figures). The inner air guide ring 12 then protrudes beyond the outer air guide ring 12, viewed in the axial direction.
  • FIG 8 A possible embodiment of a rotary atomizer 20 is shown. At its downstream end is the shaping air ring 1. The Figure 8 The rotary atomizer 20 shown has a flange 23 at the upstream end with which it can be attached to a manipulator.
  • the shaping air ring 1 installed in the rotary atomizer 20 has, in addition to the shaping air nozzles 5, additional air nozzles 4. However, the additional air nozzles 4 are not absolutely necessary.
  • the shaping air nozzles 5 are aligned so that the shaping air jet 15 generated by them strikes the spray edge 3.1 of the bell cup 3.
  • the shaping air nozzles 5 can also be aligned so that the shaping air jet generated by them (in Figure 9 marked with the reference numeral 15') strikes the bell cup 3 at a defined point on the outside. This point is, viewed upstream, in front of the spray edge 3.1
  • the distance c between the point at which the shaping air jet 15' hits the bell cup 3 and the spray edge 3.1 is preferably between 0 and 3 mm.
  • the rotary atomizer 20 is designed such that the shaping air nozzles 5 and the additional air nozzles 4 can be operated independently of one another.
  • the rotary atomizer 20 comprises a material line 30 to convey the coating material downstream towards the bell cup 3. After the coating material has exited the material line 30, it encounters a distributor plate 32. The majority of the coating material is transported radially outwards to the inner surface of the bell cup 3 with the help of the distributor plate 32. A small proportion of the coating material may be thrown back upstream, towards the material line 30. This material is then guided into a receiving chamber 34. At least one wall of the receiving chamber 34 is part of the bell cup 3, so that it rotates with the bell cup.
  • the thrown-back material Due to the resulting rotational force, the thrown-back material is guided via a discharge line 36 to the outer edge of the distributor plate 32 and thus also onto the inner surface of the bell cup 3. In this way, the thrown-back material is not lost and does not accumulate inside the rotary atomizer 20. Via flushing agent lines 38, both the The inner surface of the bell cup 3 as well as the receiving chamber 34 must be cleaned.
  • the forming air ring can also be designed as a single piece.
  • the single-piece version of the forming air ring is identified by the reference numeral 100 and is shown in the Figures 10 and 11
  • the inner air guide ring is part of the molded air ring and is inseparably connected to it.
  • nozzle channels 8 are formed completely within one component. This is also shown in the Figures 10 and 11 shown.
  • the shaping air ring can be constructed in several parts, i.e., comprising several components, but the nozzle channels 8 are formed entirely within one component. The separation of the components thus takes place outside the area of the nozzle channels 8.
  • FIG 12 A further embodiment of an inner air guide ring 212 is shown.
  • the webs 6 are part of the inner air guide ring 212.
  • the outer air guide ring 11 preferably has no webs and grooves (not shown).
  • the inner air guide ring 212 has Figure 12 Each of the two webs 6 has a groove 7 between them. Two webs 6 and a groove 7 form the left, right, and lower sides of a shaping air duct 8. The upper side of the shaping air duct 8 is formed by the inside of the outer air guide ring. At its upstream end, the shaping air duct 8 has a duct inlet opening 9 and at its downstream end, a duct outlet opening 10.
  • a shaping air nozzle 5 comprises the shaping air channel 8, the channel inlet opening 9, and the channel outlet opening 10.
  • the channel outlet opening 10 forms the nozzle outlet 5.1 of the shaping air nozzle 5.
  • a plurality, preferably 40 to 80, of these shaping air nozzles 5 are arranged in a ring in the shaping air ring.
  • the shaping air nozzles 5 are preferably arranged equidistantly.
  • the inner air guide ring 212 (see Figure 12 ) holes 14 must be present.
  • the compressed air can be guided to the nozzles 4 through the holes 14.
  • Compressed air can be supplied to the shaping air nozzles 5 via bores 17 and an annular groove 18 provided in the inner air guide ring 212.
  • the compressed air flows through the bores 17, the annular groove 18, the channel inlet openings 9, and the nozzle channels 8 to the channel outlet openings 10.
  • the webs 6 are shorter than in the outer air guide ring 11 according to Fig. 7 .
  • the length b6 of the webs 6 is therefore shorter than the channel length b8. If the webs 6, as shown in the Figures 13 and 14 shown, do not extend to the downstream edge 211.2 of the outer air guide ring 211, the channel outlet openings 10 touch each other.
  • the webs 6 each have the shape of a wedge, with the wedge tip located on the downstream side of the shaped air channel 8. Unlike the air guide ring 11 according to Figures 1 to 7 The wedge is not blunt, but pointed. In the air guide ring 211, the wedge tip does not reach the downstream edge 211.2 of the air guide ring 211.
  • FIG. 15 and 16 An additional embodiment of an outer air guide ring 311 is shown in the Figures 15 and 16 Here, too, the webs 6 taper in the downstream direction.
  • the webs 6 each have the shape of a wedge, with the wedge tip located on the downstream side of the shaping air duct 8.
  • the wedge tip of the air guide ring 311 lies on the downstream edge 311.2 of the air guide ring 311.
  • the length b6 of the webs 6 is equal to the channel length b8.
  • the channel outlet openings 10 just touch each other.
  • the shaping air ring 400 comprises, in addition to the outer air guide ring 411 and the inner air guide ring 412, an intermediate ring 413.
  • the intermediate ring 413 is located between the outer air guide ring 411 and the inner Air guide ring 412.
  • the outer air guide ring 411, the intermediate ring 413, and the inner air guide ring 412 are preferably arranged concentrically. Their longitudinal axes are congruent.
  • the intermediate ring 413 has webs 6 and grooves 7 on its outer and inner sides.
  • the outer webs 6 of the intermediate ring 413 rest against the inside of the downstream end portion of the outer air guide ring 411.
  • the inner webs 6 of the intermediate ring 413 rest against the outside of the downstream end portion of the inner air guide ring 412.
  • the fourth side of the outer shaping air duct 8 is formed by the inside of the outer air guide ring 411.
  • the fourth side of the inner shaping air duct 8 is formed by the outside of the inner air guide ring 412.
  • the shaping air duct 8 has a duct inlet opening at its upstream end and a duct outlet opening at its downstream end.
  • a shaping air nozzle 5 also comprises the shaping air channel 8, the channel inlet opening 9, and the channel outlet opening 10.
  • the channel outlet opening 10 forms the nozzle outlet 5.1 of the shaping air nozzle 5.
  • a plurality, preferably 40 to 80, of these shaping air nozzles 5 are arranged in a ring in the shaping air ring 1.
  • the shaping air nozzles 5 are preferably arranged equidistantly.
  • the shaping air nozzles 5 can, as in Figure 17 and 18 shown, be crescent-shaped or lens-shaped.
  • the additional air nozzles 4 can also be crescent-shaped or lens-shaped, as shown in Figures 17 and 18. Such nozzle channels are easy to manufacture.
  • the shaping air nozzles 5 and the additional air nozzles 4 are arranged on the same plane. Furthermore, the additional air nozzles 4 are located closer to the spray edge 3.1. Since the shaping air nozzles 5 and the additional air nozzles 4 are arranged on the same plane, there is no step between the shaping air nozzles 5 and the additional air nozzles 4. This reduces the area between the two air jets and also reduces the area's contamination by turbulence.
  • the embodiment according to Figures 17 - 19 has the advantage of being removable and therefore easy to clean.
  • the air ducts 8 and the grooves 7 are openly accessible along their entire length, making them easier to clean.
  • the rotary atomizer 20 comprises a drive shaft 50, which is preferably designed as a hollow shaft.
  • a material line can be provided inside the hollow shaft, via which the coating material can be transported towards the spray bell plate 3.
  • the drive shaft 50 is Figure 20 shown embodiment is driven by a drive turbine 51.
  • the drive turbine 51 in turn is preferably driven by compressed air.
  • a possible embodiment of the drive turbine 51 and the drive shaft 50 are shown in Figure 21 shown in a three-dimensional view.
  • the spray bell plate 3 is screwed onto the drive shaft 50.
  • the drive shaft 50 can be blocked so that it can no longer rotate.
  • a locking device 52 is provided.
  • one or more slots 50.1 are provided at the upstream end of the drive shaft 50.
  • the locking device 52 has a movably mounted locking pin 53, wherein the locking pin 53 and the slot 50.1 are coordinated with one another. When the locking pin 53 projects into the slot 50.1, the drive shaft 50 is blocked. If the locking pin 53 is outside the slot 50.1 (see Figure 20 ), the drive shaft 50 can rotate.
  • the locking pin 53 is pressed manually into the slot 50.1.
  • the locking device 52 has a compressed air control connection 55, via which the locking pin 53 is pressed into the slot 50.1 by means of compressed air.
  • the locking pin 53 can be pretensioned so that it rests outside the slot 50.1 in the non-actuated state. If the locking pin 53 is actuated, i.e. pressed into the slot 50.1, a vent opening 56 ensures that the air contained in the housing below the locking pin 53 The air present is discharged and cannot build up any back pressure.
  • the locking mechanism can be activated, for example, by means of a compressed air control.
  • a manually operated pneumatic valve can be provided for this purpose at the rear of the rotary atomizer.
  • a push button can be provided in the housing, for example.
  • the pneumatic valve can also be located outside the rotary atomizer. It is also possible to activate the locking mechanism using an electrically controlled pneumatic valve, which is controlled by a control system.
  • the locking pin 53 can only protrude into the slot 50.1 if the drive shaft 50 is in the correct rotational position. If there are several slots 50.1, for example, four, the drive shaft 50 only needs to be rotated by about 90° in the worst case scenario so that the locking pin 53 can be pushed into one of the four slots 50.1.

Landscapes

  • Electrostatic Spraying Apparatus (AREA)
EP23211933.9A 2023-11-24 2023-11-24 Anneau d'air de moulage pour pulvérisateur rotatif et pulvérisateur rotatif avec anneau d'air de moulage Pending EP4559581A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP23211933.9A EP4559581A1 (fr) 2023-11-24 2023-11-24 Anneau d'air de moulage pour pulvérisateur rotatif et pulvérisateur rotatif avec anneau d'air de moulage
PCT/EP2024/081822 WO2025108745A1 (fr) 2023-11-24 2024-11-11 Anneau d'air de conformation pour un atomiseur rotatif et atomiseur rotatif avec anneau d'air de conformation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP23211933.9A EP4559581A1 (fr) 2023-11-24 2023-11-24 Anneau d'air de moulage pour pulvérisateur rotatif et pulvérisateur rotatif avec anneau d'air de moulage

Publications (1)

Publication Number Publication Date
EP4559581A1 true EP4559581A1 (fr) 2025-05-28

Family

ID=88969623

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23211933.9A Pending EP4559581A1 (fr) 2023-11-24 2023-11-24 Anneau d'air de moulage pour pulvérisateur rotatif et pulvérisateur rotatif avec anneau d'air de moulage

Country Status (2)

Country Link
EP (1) EP4559581A1 (fr)
WO (1) WO2025108745A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1076190A (ja) * 1996-09-05 1998-03-24 Abb Ind Kk 回転霧化頭型塗装機
US5862988A (en) * 1996-05-15 1999-01-26 Van Der Steur; Gunnar Coating apparatus and shroud thereof
EP2099570B1 (fr) 2006-12-06 2018-10-03 Dürr Systems AG Anneau pour guider l'air comprenant une cavité annulaire et cloche correspondante

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5862988A (en) * 1996-05-15 1999-01-26 Van Der Steur; Gunnar Coating apparatus and shroud thereof
JPH1076190A (ja) * 1996-09-05 1998-03-24 Abb Ind Kk 回転霧化頭型塗装機
EP2099570B1 (fr) 2006-12-06 2018-10-03 Dürr Systems AG Anneau pour guider l'air comprenant une cavité annulaire et cloche correspondante

Also Published As

Publication number Publication date
WO2025108745A1 (fr) 2025-05-30

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