DE102015213824A1 - Spray device for applying a colored medium to a component of a motor vehicle - Google Patents

Abstract

The invention relates to a spray device (100) for applying a colored medium (32) on a component (30) of a motor vehicle with a base body (10), a cover member (13) covering the base body (10) in spray direction (11), and a A plurality of spray nozzles (14) arranged on the cover element (13), which are each connected to a paint line (15) and a compressed air line (16), wherein the cover element (13) and / or the spray nozzles (14) are adjustable such that a size of an application surface (31) of the color medium (32) is adaptable to the component (30).

Description

The invention relates to a spraying device for applying a colored medium to a component of a motor vehicle.

For applying a colored medium to a component of a motor vehicle, it is known to use, as a spraying device, which can also be referred to as motor vehicle painting device, for example, an air atomizer or a rotary atomizer.

A rotary atomizer has a bell cup, which rotates in operation at a high speed and emits a spray jet at an annular peripheral spray-off edge. The color medium to be applied, in the form of a wet paint, in this case is fed through a paint tube and then first meets in the bell cup on a rotatable with the bell plate deflection plate with a through hole, the deflection disc divides the axially incident paint stream into two streams. A first partial flow is laterally deflected by the deflecting disk in the radial direction and, owing to the centrifugal force occurring during operation, flows outward along an internal overflow surface to the spray-off edge, where the color medium is finally discharged in the form of a spray jet. The second partial flow, however, passes axially through the through holes in the deflection plate and then flows on the end face of the deflection plate due to the centrifugal force in the radial direction to the outside, so that the end face of the deflection plate is permanently overflowed in operation of color medium.

Compared to a normal air atomizer, the rotary atomizer has the advantage that it can achieve a coating efficiency of 60% -70% of a paint medium on the surface of the component to be applied, whereas with a normal air atomizer only an efficiency of 30% can be achieved, which means that 70% of the paint medium is transported unused by an exhaust air in a leaching. The degree of application efficiency is defined by the amount of colorant that is dispensed by the sprayer and actually impinges on and accumulates on the surface of the component to be processed.

In order to further improve the order efficiency in a rotary atomizer, it is from the DE 10 2006 054 786 A1 It is known to arrange at the spraying device a first shaping air nozzle arrangement for dispensing a first shaping air stream for forming the spray jet and a second shaping air nozzle arrangement for dispensing a second shaping air stream for forming the spray jet, wherein furthermore a control device for influencing the two shaping air streams as a function of at least one application parameter, the one Property of the applied color medium or an operating size of the rotary atomizer reproduces is provided. In order to be able to influence the directing air flows, the at least one application parameter must first be determined and subsequently the directing air flows must be influenced correspondingly as a function of the ascertained application parameter. This requires a lot of effort in terms of control and also the construction of the designed as a rotary atomizer sprayer.

The invention is therefore based on the object to provide a spraying device available, which is characterized by a further improved order efficiency at a simultaneously simplified construction of the spraying device.

The object is achieved according to the invention with the features of the independent claim. Advantageous embodiments and further developments are specified in the subclaims.

The spraying device according to the invention comprises a base body, a covering element covering the base body in spraying direction and a multiplicity of spray nozzles arranged on the covering element, which are each connected to a paint line and a compressed air line, wherein the covering element and / or the spray nozzles are adjustable in this way in that a size of an application surface of the color medium can be adapted to the component.

In contrast to the design of a rotary atomizer, the spraying device according to the invention has a large number of individual spray nozzles, via which the color medium emerges from the spraying device in order to be applied to the component to be processed, such as a body part of a motor vehicle. The spray nozzles are distributed, preferably evenly distributed, arranged over the surface of the cover. The cover is preferably formed like a disk and covers an opening formed in the spray direction of the body. The main body, which may be cylindrical, conical or polygonal, for example, preferably forms a housing in which the plurality of color lines and compressed air lines, which are guided to the individual spray nozzles, are accommodated. Each spray nozzle is associated with a color line and a compressed air line, so that each spray nozzle separately from the other spray nozzles, the color medium and compressed air can be supplied. In order to increase the application efficiency when applying the colored medium to the component to be processed, in particular to increase it to 90% -100%, it is provided according to the invention the cover element and / or the spray nozzles are adjustable such that a size of an application surface of the color medium can be adapted to the component. The application surface is the region of the surface of the component to which can be applied to the component during a spray by means of the spray device in an idle state of the spray device, ie without a movement, in particular a pivoting movement of the spray device, color medium. By adjusting the cover and / or the spray nozzles, the size and thus the dimensions, such as the diameter of this application surface can be customized. If, for example, components with smaller surfaces, for example, components in the interior of the motor vehicle, color medium are applied, the size of the application surface can be reduced by means of adjustment or adjustment of the cover and / or the spray nozzles, so that by means of the spray a total spray with a small width or diameter can be applied to the component to be machined. If, on the other hand, colorant medium is to be applied to components with larger areas, the size of the application area can be increased, so that a total spray jet having a greater width or diameter can be applied to the component to be processed via the spray nozzles. The change in the total spray jet width of the spray medium emerging from the spray medium is thus not by additional Lenkluftströme, but by an immediate adjustment of the cover and / or the spray nozzles, so that over the previously known solutions a further improved order efficiency can be achieved with a simplified construction of the spraying device can.

The cover element can be adjustable, for example, by the cover element being designed to be deformable in the spray direction and counter to the spraying direction. In a deformation of the cover in spray direction, the cover can be arched relative to the main body to the outside, so that the cover assumes a convex curvature. In a convex curvature of the cover, the arranged on the cover spray nozzles are inclined relative to a straight design of the cover that the emerging from the spray nozzles Gesamttsprühstrahl is widened or widened and thus increases the size of the application surface of the color medium to the component to be machined or is widened. The spray nozzles are then preferably arranged inclined away from one another. In a deformation of the cover against the spraying direction, the cover can be arched relative to the base body inwards, so that the cover assumes a concave curvature. In the case of a concave curvature of the covering element, the spray nozzles arranged on the covering element are inclined with respect to a straight formation of the covering element such that the total spraying jet emerging from the spraying nozzles is narrowed or reduced in width and thus the size of the application surface of the colored medium to be processed Component is reduced. The spray nozzles are then preferably arranged inclined to each other.

In order to achieve a good deformability of the cover, the cover may be formed as a formed of a flexible material membrane. If the cover is formed from such a membrane, the cover can be elastically deformable over its entire surface in order to achieve good mobility of the cover can.

Furthermore, it is also possible for the cover element to be formed from a plurality of receiving elements arranged so as to be movable relative to one another, wherein a defined number of the plurality of spray nozzles can be arranged on each receiving element. The receiving elements themselves are preferably rigid, so that they do not deform with a deformation or movement of the cover in spray direction and against the spray direction. Due to the rigid design of the receiving elements, a permanent, secure attachment of the spray nozzles to the receiving elements can be achieved. For example, the individual spray nozzles may be fastened to the receiving elements via a screw connection. Furthermore, attachment of the spray nozzles to the receiving elements can also be effected by means of an adhesive, welding or riveting connection. The receiving elements may be formed, for example, of a metal or of a plastic. The receiving elements are preferably plate-shaped and preferably extend radially inwards from the cover element radially outward of the cover element. The receiving elements may, for example, each have a triangular shape or a circular segment shape. In order to be able to achieve a deformability of the cover element formed from a plurality of receiving elements in the spraying direction and against the spraying direction, the receiving elements are preferably designed to be movable relative to the main body and also relative to the respectively adjacent receiving elements. Due to this movable embodiment of the receiving elements, a convex and a concave deformation of the covering element can also be achieved with rigidly formed receiving elements.

A movable attachment of the receiving elements on the base body can be done for example by means of a hinge connection. Also between adjacent receiving elements arranged one or more articulated joints may be arranged to allow a relative movement between the receiving elements can. By means of the articulated joints, a mobility of the receiving elements and thus of the cover element formed from the receiving elements can be achieved with a low design effort. The articulated connection can be formed, for example, by means of a hinge element. As an alternative to the individual joint connections, provision can also be made for a flexible material, for example a plastic film, to be arranged between the receiving elements and / or between the receiving elements and the base body, which permits a relative movement of the receiving elements relative to one another and also a relative movement of the receiving elements to the base body can allow.

For the deformation of the cover, a control may be provided, which may be electrically, mechanically, pneumatically and / or hydraulically formed. In an electrical control, this may for example have an electric motor. A pneumatic control can be done by means of compressed air. A hydraulic control can be done by means of a pump-piston unit. A mechanical control can be done for example by means of a manually operable linkage.

Preferably, it can be provided that the control comprises a plunger arranged on the cover, which is movable for movement of the cover by means of a drive device in the direction of spraying and counter to the spraying direction. In order for the cover element to follow the movement of the plunger both in the direction of spraying and counter to the spray direction, the cover element is preferably firmly connected to the cover element. The plunger and the drive device can be arranged in the base body, so that the plunger can be arranged on the cover, for example by the plunger rests against an underside of the cover element pointing towards the base body and / or the plunger is connected to the cover element, for example via a hinge connection is. The drive device may be in the form of an electric motor, such as a servomotor. In order to hold the plunger and thus the cover in a certain position, the controller may further comprise a locking element. The locking element may for example be in the form of a spindle, in particular a threaded spindle, which is arranged on the plunger.

To set the spray nozzles, the plurality of spray nozzles may each have a control device in which a guided from the paint line through the spray nozzle amount of colorant and a guided by the compressed air line through the spray nozzle amount of compressed air are separated from each other controllable. Thus, with each spray nozzle, both the quantity of compressed air to be passed through and the quantity of ink to be passed through can be adjusted, wherein the amount of ink to be passed through can be set independently of the quantity of compressed air to be passed through. By adjusting or regulating the amount of compressed air to be passed through as well as the quantity of ink to be passed through, the size of the application surface of the colored medium can hereby also be adapted and adjusted individually to the component. For example, with a reduction in the quantity of ink to be passed through, the size of the application surface of the colored medium can be reduced to the component. By increasing the amount of ink to be passed through, however, the size of the application surface of the colored medium on the component can be increased or increased.

The control devices of the plurality of spray nozzles are preferably designed such that each spray nozzle is controllable independently of the other of the plurality of spray nozzles. Thus, the ink quantity to be passed through as well as the amount of compressed air to be passed through can be adjusted individually at each spray nozzle. Each spray nozzle of the spray device can thus deliver a different amount of colorant as well as a different amount of compressed air. Due to the possibility of individual, specific adjustability of the individual spray nozzles, the application efficiency can be further improved.

Further, it is also possible that the control means of two or more of the plurality of spray nozzles are interconnectable to a group, wherein the durchzuleitende amount of color medium and the amount of compressed air to be passed through within the interconnected group is uniformly adjustable. By interconnecting several spray nozzles into a group, the control of the spray nozzles can be simplified with respect to the amount of color medium to be passed through and the amount of compressed air to be passed through. For example, the spray nozzles arranged radially on the outside of the cover element can be interconnected to form a first group and the spray nozzles arranged radially inward on the cover element can each be connected together to form a second group. If only the ink medium is to be applied to a small area, the first group of spray nozzles can be controlled such that the amount of colorant to be passed through is reduced to zero, whereas the second group of spray nozzles can be controlled such that the amount of colorant to be passed through is increased.

Further measures which improve the invention are described in more detail below together with the description of preferred embodiments of the invention with reference to the figures.

Show it:

1 a schematic representation of a spraying device according to the invention,

2 a schematic representation of in 1 shown spraying device with a curved against the spraying direction formed cover,

3 a schematic representation of in 1 shown spraying device with a curved in direction of spraying cover,

4 a schematic representation of a plan view of a plurality of receiving elements exhibiting cover of a spray device according to the invention, and

5 a schematic sectional view along a longitudinal axis of a spray device according to the invention.

In 1 is a spray device according to the invention 100 shown schematically, which for applying a color medium 32 on a component 30 a motor vehicle is used.

The spraying device 100 has a basic body 10 and one the main body 10 in spray direction 11 one of several sprays 12 covering overall spray jet covering cover 13 on. The cover element 13 extends over the entire cross-sectional area of the body 10 and covers one at an end face of the main body 10 trained opening.

On the cover 13 are a variety of spray nozzles 14 over the entire surface of the cover 13 arranged, using the spray nozzles 14 the individual sprays 12 from the sprayer 100 escape. Every spray 12 indicates a certain amount of color medium 32 and a certain amount of compressed air. For this is every spray nozzle 14 with a color line 15 and a compressed air line 16 connected, as in 5 is shown. About the color line 15 becomes the spray nozzle 14 the color medium 32 fed and via the compressed air line 16 becomes the spray nozzle 14 Compressed air supplied.

The spray nozzles 14 can be designed as so-called airbrush nozzles. Spray nozzles designed as airbrush nozzles 14 have an inner nozzle and an inner nozzle surrounding the outer nozzle. Through the nozzle located inside, the color medium flows 32 and through the outer nozzle, the compressed air flows. As a result, the compressed air flows at the inner nozzle with the color medium 32 past. Due to the resulting air flow is in the direction of flow or in spray direction 11 behind the inside nozzle with the color medium 32 generates a negative pressure. This negative pressure turns the color medium 32 from the inside nozzle and thus from the spray nozzle 14 sucked and then atomized by the air flow formed by the compressed air and entrained. To control the amount of colorant 32 , which is passed through the inner nozzle and at the outlet of the spray nozzle 14 is dispensed, centered in the inner nozzle, a needle may be arranged to be movable, wherein by means of the position of the needle in the inner nozzle, the amount of emerging color medium 32 can be regulated and thus adjusted.

The spraying device 100 is characterized in that by means of an adjustment of the cover 13 and / or a setting of the spray nozzles 14 the size of the application area 31 of the color medium 32 on the component 30 is customizable, which means that the width or the diameter of the out of the several spray jets 12 formed Gesamttswühstrahls adaptable and thus can be variably adjusted to different conditions.

An adjustment of the cover 13 can be done by the cover 13 against the spray direction 11 , as in 2 is shown, and in spray direction 11 , as in 3 is shown, deformable.

In 2 is the cover element 13 against the spray direction 11 deformed, leaving the cover 13 in the interior 19 of the basic body 10 arched is formed. By this concave shaping of the cover 13 are the individual spray nozzles 14 inclined to each other, so that the individual, from the spray nozzles 14 emerging spray jets 12 with an extension of the spray jets 12 would meet at a common center. This results in a concentration of the many individual spray jets 12 composite total spray jet, so that a large amount of color medium 32 on a relatively small application area 31 concentrated can be applied. The width or the diameter of the total spray jet is then reduced.

In 3 is the cover element 13 however, in the direction of spraying 11 deformed, leaving the cover 13 arched outwards and thus from the interior 19 of the basic body 10 arched way is formed. Through this convex shaping of the cover 13 are the individual spray nozzles 14 tilted away from each other here, leaving the spray nozzles 14 emerging spray jets 12 are directed away from each other and this with an extension of the spray jets 12 no longer meet at a common center. The resulting from the many individual sprays 12 resulting total spray is contrary to the in 2 shown position of the cover 13 expanded so that the same amount of color medium 32 on a larger order surface 31 as at the in 2 shown position of the cover 13 is applied. Due to the larger application area 31 is the amount of color medium 32 per surface section of the component 30 smaller than the one in 2 shown position of the cover 13 , At the in 3 shown position of the cover 13 the width or the diameter of the total spray is then increased.

To the good mobility or deformability of the cover 13 To be able to achieve this can be formed as a membrane formed of a flexible material.

Alternatively, the mobility or deformability of the cover 13 also be achieved in that this of several, movably arranged to each other receiving elements 17 is formed, as in 4 is shown. The recording elements 17 are arranged side by side. The recording elements 17 are plate-shaped, wherein the individual receiving elements 17 each have a triangular shape or a circular segment shape.

Several of the variety of spray nozzles 14 are at the individual recording elements 17 arranged, wherein preferably each receiving element 17 an equal number of spray nozzles 14 having.

To a mobility of the individual recording elements 17 to each other and thus a deformability of the cover 13 to be able to reach, are the receiving elements 17 by means of a hinge connection 23 , such as a hinge member, movable on the body 10 attached.

5 shows a sectional view of the spray device 100 according to the in 4 shown embodiment. For deformation of the cover 13 is a controller 18 provided, which is formed here mechanically and electrically. The control 18 is in the interior 19 of the basic body 10 arranged.

The control 18 has a longitudinal direction 21 the spray device 100 movable plunger 20 on, leaving the pestle 20 can be moved up and down. The pestle 20 is located on one towards the interior 19 of the basic body 10 pointing bottom 22 of the cover 13 centered or centered on. Preferably, the plunger 20 firmly on the cover 13 attached. At the in 4 and 5 shown embodiment, this is done by the receiving elements 17 movable on the pestle 20 are attached. The movable attachment can each by means of a hinge connection 24 , such as a hinge element. The recording elements 17 are thus radially outward by means of a hinge connection 23 on the body 10 movably mounted and radially inward are the receiving elements 17 by means of another joint connection 24 movable at the control 18 , in particular on the plunger 20 the controller 18 , attached.

The ram is driven 20 by means of a drive device 25 , which is designed here as an electric motor.

The control 18 also has a locking element 26 on, by means of which the plunger 20 can be kept fixed in a certain position. The locking element 26 may be formed, for example, in the form of a spindle.

The dashed representation of the cover 13 , a spray nozzle 14 and a part of the plunger 20 shows a position at which the cover 13 by means of the controller 18 in spray direction 11 is deformed.

The invention is not limited in its execution to the above-mentioned preferred embodiments. Rather, a number of variants is conceivable, which makes use of the solutions shown even in fundamentally different versions. All features and / or advantages resulting from the claims, the description or the drawings, including design details, spatial arrangements and method steps, can be essential to the invention, both individually and in the most diverse combinations.

LIST OF REFERENCE NUMBERS

100

 sprayer

10

 body

11

 spray direction

12

 spray

13

 cover

14

 spray nozzle

15

 paint line

16

 Compressed air line

17

 receiving element

18

 control

19

 inner space

20

 tappet

21

 longitudinal direction

22

 bottom

23

 articulation

24

 articulation

25

 driving means

26

 locking

30

 component

31

 application surface

32

 color medium

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102006054786 A1 [0005]

Claims (10)

Spraying device ( 100 ) for applying a color medium ( 32 ) on a component ( 30 ) of a motor vehicle, with a base body ( 10 ), one the main body ( 10 ) in spraying direction ( 11 ) covering cover element ( 13 ), and a plurality of on the cover ( 13 ) arranged spray nozzles ( 14 ), each with a color line ( 15 ) and a compressed air line ( 16 ), wherein the cover element ( 13 ) and / or the spray nozzles ( 14 ) are adjustable such that a size of a job surface ( 31 ) of the color medium ( 32 ) on the component ( 30 ) is customizable. Spraying device ( 100 ) according to claim 1, characterized in that the cover element ( 13 ) in spraying direction ( 11 ) and against the spray direction ( 11 ) is formed deformable. Spraying device ( 100 ) according to claim 2, characterized in that the cover element ( 13 ) is formed as a membrane formed of a flexible material. Spraying device ( 100 ) according to claim 2, characterized in that the cover element ( 13 ) of a plurality of movably arranged receiving elements ( 17 ) is formed, wherein on each receiving element ( 17 ) a defined number of the plurality of spray nozzles ( 14 ) is arranged. Spraying device ( 100 ) according to claim 4, characterized in that the receiving elements ( 17 ) each by means of a hinge connection ( 23 ) movable on the base body ( 10 ) are attached. Spraying device ( 100 ) according to one of claims 2 to 5, characterized in that for the deformation of the cover ( 13 ) a controller ( 18 ) is provided, which is electrically, mechanically, pneumatically and / or hydraulically formed. Spraying device ( 100 ) according to claim 6, characterized in that the controller ( 18 ) one on the cover ( 13 ) arranged plunger ( 20 ), which for the deformation of the cover ( 13 ) by means of a drive device ( 25 ) in spraying direction ( 11 ) and against the spray direction ( 11 ) is movable. Spraying device ( 100 ) according to one of claims 1 to 7, characterized in that the plurality of spray nozzles ( 14 ) each have a control device, by means of which one of the color line ( 15 ) through the spray nozzle ( 14 ) guided amount of color medium and one of the compressed air line ( 16 ) through the spray nozzle ( 14 ) Guided amount of compressed air are separated from each other controllable. Spraying device ( 100 ) according to claim 8, characterized in that the control means of the plurality of spray nozzles ( 14 ) are formed such that each spray nozzle ( 14 ) independently of the other of the plurality of spray nozzles ( 14 ) is controllable. Spraying device ( 100 ) according to claim 8 or 9, characterized in that the control means of two or more of the plurality of spray nozzles ( 14 ) are interconnectable to a group, wherein the durchzuleitende amount of colorant medium and the amount of compressed air to be passed through within the interconnected group is uniformly adjustable.

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