EP3554715A1 - Applicateur de peinture comprenant des airs de jupes réglables - Google Patents
Applicateur de peinture comprenant des airs de jupes réglablesInfo
- Publication number
- EP3554715A1 EP3554715A1 EP17816970.2A EP17816970A EP3554715A1 EP 3554715 A1 EP3554715 A1 EP 3554715A1 EP 17816970 A EP17816970 A EP 17816970A EP 3554715 A1 EP3554715 A1 EP 3554715A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- applicator
- air
- paint
- cup
- skirt
- 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- Withdrawn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
- 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, i.e. the spraying being effected by centrifugal forces
- 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
- 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
- B05B5/0426—Means for supplying shaping gas
Definitions
- the invention relates to the field of paint applicators, more particularly bowl type paint applicators.
- the car body parts are painted in cabins designed for this purpose.
- the painting process consists of the successive application of three different coatings on the part.
- a first coating called primary
- a second coating called base
- a third coating called varnish
- the pieces to be painted circulate in the painting booth in front of different paint stations, such as "painter robots", to receive the primary, then the base and finally the varnish. It can also be fixed spray stations, the piece being moved in front of the sprayer.
- paint corresponds to at least one of these three coatings.
- the bodywork parts have portions having more or less large surfaces.
- a bumper may have solid portions for which the surface to be painted is important, and grids for which the surface to be painted is relatively small.
- the transfer coefficient is the amount of paint deposited on the part compared to the amount of paint sprayed from a sprayer. In other words, it is necessary to make sure to deposit on the piece the maximum of spray paint.
- sprayers often two in each layer of coating (primer, base and varnish).
- These can be sprayers mounted on robotic and articulated arms, arms programmed to follow a precise trajectory at a given speed depending on the parts and areas to be painted. They may also be sprayers mounted on a stationary spray station, the part being moved in front of the sprayer.
- These sprayers comprise at their end a bowl-shaped applicator.
- Each bowl has at its free end a paint spray cup.
- the cup is rotated and paint is injected at the center of the cup.
- the paint is plated on the wall of the cup due to the centrifugal force and is divided into droplets by the shape of the cup and its rotation.
- the droplets are then projected to the room to be painted from the cup.
- the spray of paint is focused by jets of air projected around the cup. These jets of air take the form of a skirt surrounding the cup and are called “skirt tunes". These jets of air are projected from the end of the applicator all around the cup to conform the spray paint and atomize the paint.
- An applicator generally comprises one or two tunes of skirts.
- the two air jets are concentric, the internal air jet allowing the creation of a vortex for the spray paint and the external air jet focusing the spray paint.
- the external air jet defines the impact zone of the paint spray on the piece to be painted.
- the direction of propagation of the air jets is invariant.
- Each cup works with one or more specific skirt tunes adapted to the diameter of the cup.
- Each sprayer includes a cup of different diameter and is intended to paint different surfaces.
- An object of the invention is to eliminate, or at least to significantly limit, all or part of the aforementioned drawbacks, by providing a painting device to obtain a significant transfer coefficient while maintaining an optimal paint rate.
- the subject of the invention is a bolus-type paint applicator, comprising:
- the applicator comprising means capable of modifying the direction of at least a portion of the an air jet scattered around the cup.
- a sprayer for example a robotic arm or a fixed spray station, equipped with such an applicator will be able, during the time during which a room is in front of him, change the shape and / or the size of the air jet diffused around the cup and therefore the shape and / or the size of the impact zone of the paint on the piece to be painted, zone delimited by the air jet.
- a sprayer for example a robotic arm or a fixed spray station, equipped with such an applicator will be able, during the time during which a room is in front of him, change the shape and / or the size of the air jet diffused around the cup and therefore the shape and / or the size of the impact zone of the paint on the piece to be painted, zone delimited by the air jet.
- the impact zone of the paint is thus adapted to the surface of the workpiece facing the applicator, which makes it possible to increase the transfer coefficient by preventing a large quantity of paint from being sprayed on both sides. other of the area being painted.
- the action spectrum of a cup is greatly increased, that is to say the number of zones of a bodywork part that can be painted by the cup with a satisfactory transfer coefficient. This also avoids having to replace the cup on the applicator by the intervention of an operator.
- the air crown can vary in size, it is possible to use cups of different diameters with the same applicator by adapting the skirt airs to the mounted cup, which allows standardization of the paint applicator.
- the flow of paint is the same as in the prior art but the rate of painting is improved because the surfaces are painted faster.
- the final appearance of a bodywork part can be improved because the adaptation of the impact zone makes it possible to project the quantity of paint adequate to the expected appearance of the painted bodywork part. For example, in the case of a metallic or pearlescent paint, adapt the size and / or the shape of the diffused air jet and therefore the impact zone of paint on the part allows a better distribution of glitter or mother of pearl on the body part.
- the crown forming the skirt air diffusion channel comprises an end in contact with a set of air outlet orifices, the end being able to be controlled by the means able to modify the direction of the air jet; scattered around the cup;
- the end in contact with the set of air outlet openings (8) comprises several zones that are independent of one another, each zone comprising means capable of modifying the direction of an air jet diffused by the corresponding area;
- the number of zones is 4 identical zones
- the means able to modify the direction of the diffused air jet comprise at least one pneumatic valve
- the applicator comprises two crowns forming concentric skirt air distribution channels
- An inner ring is fixed and an outer ring is adapted to be controlled.
- the applicator comprises several cups of different diameters nested one in the other concentrically, and;
- a paint spraying device preferably a robotic arm, comprising an applicator according to the invention.
- a first surface is painted with the crown forming a skirt air diffusion channel oriented in a first direction, and then a second surface of different shape of the first surface is painted with the crown forming the air diffusion channel. skirt of which at least a portion is oriented in a second direction different from the first direction.
- - Figure 1 is a front view of the upper surface of a paint applicator according to the invention
- - Figure 2 is a schematic representation of a comparison between the direction or directions of an air jet from an applicator according to the invention and according to the prior art
- FIG. 5 is a front view of the upper surface of the applicator according to a second embodiment
- FIG. 6 is a front view of the upper surface of the applicator according to a third embodiment
- FIG. 7 is a perspective view of a step of a method of painting a bodywork part according to the prior art.
- FIGS. 8 to 10 are perspective views of process steps of painting body parts with an applicator according to the invention.
- FIG. 1 shows an example of paint applicator 2 of the bowl type, comprising a main body 3 and a paint spray cup 4 mounted on the main body 3.
- This cup 4 is mounted in the center of an upper face 6 of the applicator 2.
- the upper face 6 comprises a plurality of air outlet orifices 8 forming two sets of annular and concentric orifices surrounding the cup, an inner assembly 10 of orifices 8 and an outer set 12 of orifices 8. These two sets allow the diffusion of two concentric air jets around the cup 4.
- Each set of orifice is supplied with air by a crown forming an air diffusion channel (no represented in FIG. 1) located under the upper face 6 of the applicator 2.
- Ring is understood to mean a hollow ring forming an air diffusion channel to the air outlet orifices 8 in order to form an air jet. in the shape of a skirt r of the cup 4. Each crown is independent of the other. The air rising through the rings feeds respectively the internal assembly 10 of orifices 8 and the external assembly 12 of orifices 8.
- the internal assembly 10 of orifices 8 is fed by a fixed ring which generates an air jet at the outlet of the internal assembly 10 of orifices 8 always extending in the same direction. This air jet allows the creation of a vortex for the paint sprayed from the cup 4.
- the outer assembly 12 of orifices 8 is supplied by a ring comprising means able to modify the direction of at least a portion of the ring supplying the outer assembly 12 of orifices 8, more precisely the end the crown in contact with the external assembly 12 of orifices 8 as will be illustrated later, in order to change the size and / or the shape of the air jet diffused from the external assembly 12 of orifices 8 Since the air flow diffused from the external assembly 12 makes it possible to focus the spray of paint, the zone of impact on the part is delimited. by him. It is therefore possible to modify the shape and / or the size of the impact zone on the part to be painted according to the shape and / or the size of the air jet diffused from the external assembly 12. holes 8.
- the number of sets of annular orifices may vary, for example it is possible to have only one ring of air outlets 8.
- the air jet diffused from this ring can be controlled as the external assembly 12 of orifices 8 of Figure 1.
- the two air jets are controlled.
- the lower part of the diagram shows a prior art applicator 2 'comprising an assembly 22 of orifices from which an air jet 24 is generated.
- This air jet 24 is always broadcast in the same direction.
- a spray paint 24 'focused by the air jet 24 therefore always has the same diameter.
- the upper part of the diagram represents an applicator 2 according to the invention in which only the outer assembly 12 of orifices 8 is shown.
- the end 38 of the ring gear 14 supplying the external set 12 of orifices 8 can be controlled in order to modify the diameter of the air jet coming out of the external set 12 of orifices 8.
- the end 38 can take three different positions to generate three air jets 16, 18 and 20 oriented in three different directions to generate three skirt airs of different diameters and therefore three paint impact surfaces on the piece to paint of different diameters.
- FIG. 2 shows three paint sprays 16 ', 18' and 20 'of different width corresponding respectively to the air jets 16, 18 and 20.
- Figures 3 and 4 show the applicator 2 of Figure 1 in two different configurations.
- the applicator 2 comprises, in addition to the cup 4 and sets of orifices 10 and 12, two rings 26 and 14 respectively supplying the sets 10 and 12 of orifices 8 in air. These are the rings mentioned above and not shown in Figure 1, the ring 14 being shown in Figure 2.
- the ring 26, inner ring comprises an innermost portion 30 the innermost of the applicator 2 and a distal end 32 in contact with the air outlet orifices 8 of the internal assembly 10 of orifices 8.
- the air blown from the crown 26 propagates in the form of a skirt around the cup 4 in a main direction 34.
- the crown 14, external ring has an architecture similar to that of the ring 26 with a proximal portion 36 and a distal end 38.
- the air blown from the crown 14 is propagated in the form of a skirt around the cup 4 according to a principal direction 40.
- the ring 14 comprises means (not shown) capable of modifying the direction of at least a portion of an air jet diffused around the cup by modifying the direction of at least a portion of the end 38 of the 14. This may be for example a pneumatic valve or any other known means for such control.
- the latter will be more or less activated (i.e. open) by an air jet having a flow spectrum of for example 100 to 600 nl_ per minute.
- the valve comprises three activation thresholds at 200, 400 and 600 nL / min. Each threshold corresponds to a more or less large opening of the valve.
- the air rushing into the end 38 then exerts a greater or lesser stress (depending on the air flow) on the latter, which leads to a change of direction of the end 38.
- the end 38 extends in a direction different from that of Figure 3. This leads to the generation of an air jet extending from the outer assembly 12 of orifices 8 in a direction main 42 different from the main direction 40 of Figure 3.
- Figures 5 and 6 respectively show applicators 102 and 202 according to second and third embodiments.
- elements similar to those previous figures are designated by identical reference numerals.
- the modified or new elements will be numbered in steps of one hundred, each hundred corresponding to an embodiment.
- the external set 12 of orifices 8 is divided into two zones 144 and 146.
- the ring gear supplying the external set 12 of orifices 8 is then divided into two parts, each part being able to be controlled independently. in order to modify the direction of the end of the crown located under the zone 144 or under the zone 146. It may for example be a pneumatic valve for each of the parts of the crown with a mode of operation similar to that explained before.
- the number of zones is equal to 4 identical zones 248, 250, 252 and 254.
- the operation is the same as with the two zones 144 and 146, namely an independent control of each of the four parts of the crown located below the outer assembly 12 of orifices 8 at the zones 248, 250, 252 and 254. This increases the number of shapes that can be taken by the skirt airs.
- the opposite zones 248/252 and 250/254 are driven at the same time. This allows to "pinch” the air stream (by changing the orientation of the parts of the crown located below these areas) to make it take an oval shape adapted to the areas of the parts to be painted comprising a narrow and elongated surface.
- each air outlet orifice 8 is controlled independently of the others.
- zoning does not exclude the possibility of controlling all zones at the same time and in the same way in order to vary only the diameter of the airflow.
- Figures 7 to 10 show perspective views of steps of a painting process using an applicator according to the prior art ( Figure 7) and according to the invention ( Figures 8 to 10).
- the body part 54 is painted by a sprayer 55 equipped with an applicator comprising a paint spraying cup focused by non-adjustable skirt airs. It is observed that, for all areas of the room and whatever their shape, the spray paint is identical which leads to a relatively low transfer coefficient because a majority of the spray paint passes through the piece 54 without being deposited on the latter.
- the part 58 in particular an area 60 of the part 58, is painted by a sprayer 56 equipped with an applicator that can vary the shape and / or the size of the projected air jet 59 from the applicator. It is more specifically the applicator of Figure 6 can "pinch" the air flow to obtain an ovoid shape. The transfer coefficient is then only improved.
- FIGS 9 and 10 illustrate the operation of the sprayer 56 equipped with an applicator according to the invention according to the area of the body part 54 to be painted.
- the sprayer 56 paints an area 62 of the workpiece 54, which area has a narrow, elongated surface.
- the shape of the air jet focusing the spray paint is modified to obtain an elongated shape.
- the impact zone of the paint on the piece is then elongated and narrow, in adequacy with the shape of the zone to be painted.
- the transfer coefficient is improved and the zone 62 is painted faster.
- the shape of the air jet focusing the spray of paint is then modified so as to ensure that the zone of impact of the paint on the room is in line with the shape of the area of the room to be painted.
- a half of the ring feeding a set of air ports is redirected to give a semi-circular shape to the air flow.
- the number of cups It is possible in particular to vary the number of cups. It is for example possible to have several cups of different diameters nested one in the other concentrically, each of the cups receiving paint in turn or multiple cups receiving paint at the same time.
- the combination between the cups of different diameters and the possibility of varying the size and / or the shape of the air flow (s) surrounding them as a function of the activated cup further increases the spectrum of action of the applicator while retaining a high paint rate and transfer coefficient.
Landscapes
- Nozzles (AREA)
- Spray Control Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1662424A FR3059917A1 (fr) | 2016-12-14 | 2016-12-14 | Applicateur de peinture comprenant des airs de jupes reglables |
PCT/FR2017/053359 WO2018109306A1 (fr) | 2016-12-14 | 2017-12-04 | Applicateur de peinture comprenant des airs de jupes réglables |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3554715A1 true EP3554715A1 (fr) | 2019-10-23 |
Family
ID=57909760
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17816970.2A Withdrawn EP3554715A1 (fr) | 2016-12-14 | 2017-12-04 | Applicateur de peinture comprenant des airs de jupes réglables |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP3554715A1 (fr) |
FR (1) | FR3059917A1 (fr) |
MA (1) | MA49109A (fr) |
WO (1) | WO2018109306A1 (fr) |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100265890B1 (ko) * | 1996-12-03 | 2000-09-15 | 라붸 린도베르 | 회전무화 헤드형 도장장치 |
JP2007000826A (ja) * | 2005-06-27 | 2007-01-11 | Duerr Japan Kk | ベル型塗装装置 |
JP2008188505A (ja) * | 2007-02-01 | 2008-08-21 | Honda Motor Co Ltd | 回転霧化塗布装置及び回転霧化塗布方法 |
-
2016
- 2016-12-14 FR FR1662424A patent/FR3059917A1/fr not_active Withdrawn
-
2017
- 2017-12-04 EP EP17816970.2A patent/EP3554715A1/fr not_active Withdrawn
- 2017-12-04 MA MA049109A patent/MA49109A/fr unknown
- 2017-12-04 WO PCT/FR2017/053359 patent/WO2018109306A1/fr unknown
Also Published As
Publication number | Publication date |
---|---|
MA49109A (fr) | 2021-04-28 |
FR3059917A1 (fr) | 2018-06-15 |
WO2018109306A1 (fr) | 2018-06-21 |
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