EP2516067B1 - System for the surface treatment of objects - Google Patents

Description

1. a) einer Behandlungskabine, die einen Behandlungsraum vorgibt;
2. b) einer Fördereinrichtung, mittels welcher die Gegenstände in den Behandlungsraum hinein und wieder aus diesem heraus förderbar sind.

The invention relates to a plant for surface treatment, in particular for painting, of objects, in particular of body parts, with

1. a) a treatment cabin, which specifies a treatment room;
2. b) a conveying device, by means of which the objects are conveyed into and out of the treatment space.

From the market known plants of this type, which are used for painting vehicle bodies and in particular of body parts. There, the treatment room is often formed as a painting tunnel, through which the body parts to be painted are conveyed in the passage through. See also US 2007/243075 as the closest prior art.

For this purpose, components of the relatively expensive in these cases conveyor, such as a monorail conveyor, a roller conveyor or the like, located in the treatment room in the interior of the treatment cabin. Even with not designed as a continuous tunnel treatment cabins corresponding conveyor components are arranged in the interior of the treatment cabin.

However, arranged in the interior of the treatment cabin components of each used conveyor are always exposed to the prevailing atmosphere in the treatment room. Among other things, this includes paint not applied to the objects, which in professional circles is referred to as "overspray". The overspray is from a detected air supplied to the paint booth and fed to a separation, so that the air can be returned to the coating booth, if necessary after a suitable conditioning again.

The overspray, which, like the applied lacquer, generally contains both solids and / or binders and solvents, can settle on the relevant components of the conveyor, whereby they are subjected to high stresses. Particularly moving parts of the conveyor are highly susceptible to sticking by overspray article.

It is therefore an object of the invention to provide a system of the type mentioned, which carries the above idea into account.

• c) die Fördereinrichtung ein Förderelement umfasst, durch welches eine erste Fläche mit einer ersten Halteeinrichtung für zumindest einen Gegenstand und wenigstens eine zweite Fläche mit einer zweiten Halteeinrichtung für zumindest einen Gegenstand bereitgestellt ist,
  wobei
• d) die erste und die zweite Fläche derart angeordnet sind, dass abhängig von der Stellung des Förderelements die erste oder die zweite Fläche den Behandlungsraum zumindest bereichsweise begrenzt.

This object is achieved in a system of the type mentioned in that

• c) the conveying device comprises a conveying element, by means of which a first surface is provided with a first holding device for at least one article and at least one second surface with a second holding device for at least one article,
  in which
• d) the first and the second surface are arranged such that, depending on the position of the conveying element, the first or the second surface at least partially limits the treatment space.

According to the invention a kind of interchangeable by these measures Interior surface or replaceable inner surface area of the treatment cabin created. The holding devices and the corresponding surfaces are largely the only components of the conveyor, which are then regularly exposed to the atmosphere in the treatment room. However, these can be formed without moving parts, so that overspray particles, which deposit on the corresponding surface and the associated holding device, do not interfere with the conveyor.

It is favorable if the conveying element is a rotary element which can be rotated about an axis of rotation.

It has proved to be particularly advantageous if the rotary member is a rotary wall associated with the treatment room with a first wall surface and a second wall surface opposite thereto. In this case, the first wall surface carries the first holding device and the second wall surface then carries the second holding device accordingly.

If the axis of rotation is vertical, the forces occurring during the rotation can be handled well.

It is favorable if a device is provided, by means of which the first surface and / or the second surface of the conveying element, a Abscheideflüssigkeit for receiving incurred in the painting space overspray can be fed. This allows overspray to be easily removed from the treatment room. In addition, the amount of overspray deposited on the surfaces and fixtures can thus be reduced, thereby extending the time between two required servicing or inspections.

If the conveying element is designed such that it does not seal the treatment space in a gas-tight manner in a position in which the first or the second area delimits the treatment space at least partially, the area on the area of the conveying element remote from the treatment area can serve as an evaporation zone for freshly painted areas Objects are used. Extraction devices for the paint booth, which are available as standard, also have an effect on this area, so that paint components evaporating therefrom from the articles are drawn past the conveyor element into the treatment space.

It is advantageous if, in addition, means of transport are provided, by means of which objects of the holding device can be fed to the area of the conveying element which does not delimit the painting area in regions, or can be removed from this holding device. In this way, the number of cycles of the system can be kept high.

It is advantageous if the means of transport comprise a transfer robot for objects, which is preferably arranged stationary.

Figur 1

eine perspektivische Ansicht einer Lackieranlage mit einer Lackierkabine und einer Beschickungs- und Entnahmezone;

Figur 2

einen vertikalen Schnitt der Lackieranlage von Figur 1 entlang der Schnittlinie II-II in Figur 3;

Figur 3

einen horizontalen Schnitt der Lackieranlage von Figur 1 entlang der Schnittlinie III-III in Figur 2, wobei eine verdrehbare Kabinenwand zwischen der Lackierkabine und der Beschickungs- und Entnahmezone in einer ersten Arbeitsstellung gezeigt ist;

Figur 4

einen der Figur 3 entsprechenden Schnitt, wobei die verdrehbare Kabinenwand in einer gegenüber ihrer Arbeitsstellung verdrehten Stellung gezeigt ist.

An embodiment of the invention will be explained in more detail with reference to the drawings. In these show:

FIG. 1

a perspective view of a paint shop with a spray booth and a loading and unloading zone;

FIG. 2

a vertical section of the painting of Figure 1 along the section line II-II in FIG. 3 ;

FIG. 3

a horizontal section of the paint shop of FIG. 1 along the section line III-III in figure 2 wherein a rotatable cabin wall is shown between the painting booth and the loading and unloading zone in a first working position;

FIG. 4

one of the FIG. 3 corresponding section, wherein the rotatable cabin wall is shown in a relation to its working position twisted position.

In the FIGS. 1 to 4 10 shows a total of a system for painting objects 12 is shown, which are exemplified in the present embodiment as a bumper of a motor vehicle. These were, for example, cleaned and degreased in not specifically shown pretreatment stations, which are upstream of the paint shop 10.

The painting installation 10 comprises a charging and removal zone 14, a painting booth 16 arranged next to it and a cleaning zone 18 communicating with the painting booth 16, in which overspray particles carried by the cabin air are separated from the cabin air.

The paint booth 16 defines a paint booth 20 which is bounded on three sides by vertical side walls 22, 24 and a vertical booth wall 26 perpendicular to and between them. The cabin wall 26 opposite a serving as a conveying element rotary wall 28 is arranged, which is mounted rotatably about a vertical axis of rotation 30. The rotary wall 28 are associated with a first and a second working position, which will be discussed again below. In its working positions, it delimits the painting space 20 on the side of the painting booth 16 opposite the booth wall 26 and spatially separates the painting space 20 from the loading and removal zone 14. In the present embodiment, the rotary wall 28 extends in their working positions each parallel to the cabin wall 26th

In a modification not specifically shown, the axis of rotation of the rotary wall 28 may also extend at any angle to the vertical and in particular horizontally.

When reference is made below to the revolving wall 28 in order to explain the painting installation 10, this is meant in one of its working positions, unless otherwise stated.

The paint booth 14 has at the top a horizontal cabin ceiling 32, which is formed in the usual way as the lower boundary of an air feed space 34 with filter cover.

The painting space 20 is open at the bottom to a flow channel 36, via which the painting space 20 communicates with a separation area 38 of the cleaning zone 18.

The flow channel 36 is bounded on both sides of the paint shop 10 of vertical channel side walls 40, of which only in FIG. 1 a channel wall 40 can be seen. The channel walls 40 each extend in the same plane as the vertical side walls 22 and 24 of the paint booth 14.

The flow channel 38 is bounded below by an air guide bottom 42, which extends from the lower edge 44 of the rotary wall 28 in the direction away from the feed and removal zone 14 direction to a vertical channel wall 46. The air guide bottom 42 comprises a first bottom portion 48 which extends from the lower edge 44 of the rotary wall 28 slightly inclined downward to a collecting channel 50, which in turn extends between the channel side walls 40 perpendicular thereto. A second bottom portion 52 of the air guide floor 42 extends slightly inclined upwardly from the collecting groove 50 to the vertical channel wall 46.

The air duct bottom 42 opposite the flow channel 36 is bounded by a curved, semi-circular in cross-section, upper air guide wall 54, wherein the apex of the curvature is arranged approximately centrally above the collecting channel 50.

As mentioned above, the flow channel 36 opens into a separation region 38 of the cleaning zone 18. In this, overspray particles carried by the cabin air are separated, for example, by means of an electrostatically operating separation device. The deposition process is not of interest here, which is why detailed explanations are omitted here.

Air coming from the air supply space 36 flows down through the painting room 20 to the flow channel 36, absorbing overspray. The flow channel 36 directs the cabin air, which is then loaded with overspray particles, to the purification zone 18 in such a way that it flows through the separation region 38 in a direction from bottom to top. The cabin air subsequently freed of overspray particles then passes into a conditioning area 56, which is arranged above the separation area 38, of the cleaning zone 18, where it is returned to the correct temperature and air humidity in a manner known per se. From there, the cleaned cabin air is again supplied to the air supply chamber 36 above the paint booth 16, where it can optionally be mixed with fresh fresh air.

In the painting room 20, a seven-axis application robot 58 is arranged, as it is known per se. The application robot 58 is supported by a carriage 60, which on the outside of the painting room 20 outside 62 of the cabin wall 26 in a carriage housing 64 in horizontal Direction along the cabin wall 26 can be moved. The cabin wall 26 has a horizontal guide slot 66. Through this extends a connecting member 68, which couples the application robot 58 with the carriage 60. The guide slot 66 is sealed on both sides of the cabin wall 26, for example by not specifically shown here lamellar seals against the carriage housing 64.

The carriage housing 64 extends beyond the vertical side wall 22 of the painting booth 16 and leads to a maintenance platform 70. The side wall 22 has a door opening 72 which can be closed by a gate 74, for example a hinged door or a roller shutter. The door opening 72 is so large that the application robot 58 can be moved through it to the maintenance platform 70 by moving the carriage 60 in the carriage housing 64 accordingly.

The rotary wall 28 has on its first wall surface 76 and on its opposite wall surface 78 as first and second holding means for the bumpers 12 respectively a first holder 80 and a second holder 82. In a modification not shown here, each wall surface 76, 78 of the rotary wall 28 carries a plurality of first holders 80 and a plurality of second holders 82, which are then preferably arranged one above the other and then correspondingly form the first and second holding means.

Below the rotary wall 28, a drive unit 84 is arranged, by means of which the rotary wall 28 can be rotated about its axis of rotation 30. Thus, optionally, the wall surface 76 with the first holder 80 or the wall surface 78 with the second holder 82 may face the painting space 20 with the application robot 58, while the respective other Wall surface 78 and 76 with their associated bracket 82 and 80 to the loading and unloading zone 14 has. These two orientations of the wall surfaces 76, 78 with the two brackets 80 and 82 define the above-mentioned first and second working position of the rotary wall 28. Thus, in the first working position of the rotary wall 28, its first wall surface 76 partially defines the painting space 20, in the second working position the rotary wall 28 limits the second wall surface 78 in regions to the painting room 20.

In a likewise not shown here modification, the rotary wall may also have more than the two wall surfaces 76, 78. If the rotary wall is formed, for example, as an isosceles triangle in a horizontal section, three wall surfaces are possible, which in turn can again carry one or more holders for the bumpers 12. Optionally, the rotary wall can also provide more than three wall surfaces with corresponding brackets available.

Generally speaking, the surfaces which carry the brackets for the bumper 12 are arranged offset in the rotational direction to each other, in such a way that depending on the position of the rotating wall, each of these surfaces can limit the painting space 20 at least partially. In the present embodiment, the wall surfaces 76 and 78 are arranged offset correspondingly in the direction of rotation by 180 ° to each other.

The loading and unloading zone 14 includes a housing 86 which defines a transfer space 88 in which a stationary transfer robot 90 is arranged, with which the bumpers 12 can be handled and moved. The rotary wall 28 in one of its working positions limits the transfer chamber 88 in the direction of the painting room 20, but does not seal the two chambers 88 and 20 from each other in a gastight manner.

The housing 86 has a feed opening 92, through which a feed conveyor 94 extends, can be promoted on the bumper to be painted 12 in the Umsetzraum 88 into the robot 90. These bumpers 12 are placed on the feed conveyor 94 outside of the housing 86 by means of a conveyor technique not specifically shown here.

The housing 86 further has a discharge opening 96 through which a discharge conveyor 98 extends, on which painted bumper 12 can be conveyed out of the Umsetzraum 88 out again. The painted bumpers 12 are removed outside of the housing 86 by means of a conveyor technology also not shown here specifically from the discharge conveyor 98 and fed to their further destination.

The Umsetzroboter 90 is dimensioned and arranged in the Umsetzraum 88 that it reaches the feed conveyor 94 and the discharge conveyor 98 and the depending on the working position of the rotary wall 28 facing him bracket 80 or 82 and absorb bumper 12 accordingly or can deliver.

The ceiling 100 of the Umsetzraumes 88 corresponds to the cabin ceiling 32 and is permeable to air. It leads to a second air supply space 102, via which the Umsetzraum 88 fresh air is supplied. This will be discussed again below.

The inner surfaces of the side walls 22, 24 and the cabin wall 26 of the painting booth 16 and the wall surfaces 76 and 78 of the rotary wall 28 are overflowed by a separating liquid in a substantially continuous layer. The separation liquid takes up a portion of the over-air carried by the cabin air, while the cabin air flows from the spray booth 16 down to the flow channel 36.

As in the FIGS. 2 to 4 can be seen, the wall surfaces 76 and the wall surfaces 78 carry at the upper edge of the rotary wall 28 each have a horizontal distribution channel 77 and 79. This can be supplied to the separating liquid each time the corresponding distribution channel 77 and 79 is arranged in the painting 20. Thus, the painting surface 20 facing wall surface 76 or 78 is always flowed over by separating liquid.

The deposition liquid laden with overspray flows there via the first bottom section 48 of the air guide floor 42 into the collecting channel 50. From there, the separating liquid can be supplied by means of two pumps 104 to a cleaning and conditioning process, in which they are in a manner known per se from the paint -Overspray is released. Then, the separation liquid can be recycled in a circuit to the corresponding wall surfaces.

• Als Ausgangssituation sei davon ausgegangen, dass beide Halterungen 80, 82 an der Drehwand 28 leer sind und die Drehwand 28 ihre zweite Arbeitsstellung einnimmt, in welcher die zweite Wandfläche 78 mit der zweiten Halterung 82 zum Lackierraum 20 und die erste Wandfläche 76 mit der ersten Halterung 80 zum Umsetzraum 88 und zum Umsetzroboter 90 weisen.

The mode of operation of the above-described paint shop 10 will now be explained below:

• As a starting point, it is assumed that both holders 80, 82 on the rotary wall 28 are empty and the rotary wall 28 assumes its second working position, in which the second wall surface 78 with the second holder 82 to the painting room 20 and the first wall surface 76 with the first holder 80 to the Umsetzraum 88 and Umsetzroboter 90 point.

During the entire process, the bumpers 12 rest on goods carriers, which can not be recognized here, which can be gripped and / or handled by the transfer robot 90 and other delivery components.

The feed conveyor 94 is from outside the housing 86 with loaded bumpers to be painted 12. These are then conveyed through the feed opening 92 in the Umsetzraum 88 to Umsetzroboter 90. The transfer robot 90 removes the bumper 12 closest to it from the supply conveyor 94 and places it on the initially empty first holder 80 on the rotary wall 28. The supply conveyor 94 is then further controlled in such a way that the next bumper 12 on the supply conveyor 94 reaches the transfer robot 90.

The rotary wall 28 is rotated by 180 ° by means of the drive unit 84 and brought into its first working position in which its wall surface 76 faces the painting space 20 with the first holder 80. This first working position of the rotary wall 28 is in the Figures 2 and 3 shown. Both the application robot 58 in the painting room 20 and the transfer robot 90 in the transfer chamber 88 are previously brought into a safety position, so that the rotary wall 28 can not touch any of the robots 58 or 90 during their movement.

Now, the bumper 12 is painted on the first bracket 80, to which the application robot 58 is driven accordingly.

During the painting process, the transfer robot 90 now takes the next bumper 12 from the supply conveyor 90 and positions it on the second support 82 on the wall surface 78 of the rotary wall 28.

As described above, the overspray occurring during painting is taken up by the booth air flowing through the painting space 20 and the deposition liquid flowing down on the inner surfaces of the painting booth 16 and collected and deposited in the further course.

When the bumper 12 on the first bracket 80 is complete has been painted, the robot 58 and 90 are brought back into its safety position and the rotary wall 28 by means of the drive unit 84 again rotated by 180 ° about its axis of rotation 30 so that it now assumes its second working position. In FIG. 4 the rotary wall 28 is shown in a position between the first and the second working position during the turning operation.

The just painted bumper 12 on the first bracket 80 is now in the Umsetzraum 88, whereas the second bracket 82 of the rotary wall 28 carries the corresponding unpainted bumper 12 in the paint 20.

There, this bumper 12 is now painted on the second bracket 82. Meanwhile, the transfer robot 90 removes the already painted bumper 12 from the first holder 80 and places it on the discharge conveyor 98. This promotes the painted bumper 12 through the discharge port 96 in the housing 86 from the Umsetzraum 88 out.

Then - still during the painting process - the transfer robot 90 takes the next bumper 12 from the supply conveyor 90 and positions it on the first support 80 on the wall surface 76 of the rotary wall 28.

After completion of the painting, the rotary wall 28 is again rotated to its first working position and the entire process with the painting of the unpainted bumper 12, the conversion of the painted bumper 12 on the discharge conveyor 98 and the conversion of an unpainted bumper 12 from the feed conveyor 94 is repeated ,

The rotary wall 28 does not have to be rotated in each case the same direction of rotation, so that after two rotations it has completed a 360 ° circulation. The rotating wall 28 may instead also once by 180 ° in one direction and then again rotated by 180 ° back in the opposite direction. In this context, the terms rotating and panning should be understood to be functionally equivalent.

For this reason, the Umsetzraum 88 on the one hand fresh air from the second Luftzuführraum 102 via the air-permeable ceiling 100 and supplied on the other hand, the Umsetzraum 88 and the painting 20 through the rotary wall 28 in their working positions not gas-tightly separated. By the air flowing along the rotary wall 28 cabin air in the spray booth 16, a suction effect is generated which is sufficient to air in the area of the freshly painted bumper 12 in the Umsetzraum 88, which is loaded with originating from the respective freshly painted bumper 12 evaporation products in the paint 20 to draw. There, this aroma air is removed from the cabin air.

In the above-described construction of the paint shop 10 are in the painting 20 no moving parts of a conveyor for transporting the painted or freshly painted bumper 12. If the application robot 58 requires maintenance, he can easily out of the painting room 20 through the door opening 72 out be driven so that it is easily accessible from outside the spray booth 16 via the maintenance platform 70 for maintenance personnel.

Claims (9)

1. A system for the surface treatment, in particular painting, of articles, in particular vehicle body parts, having

   a) a treatment booth (16) which defines a treatment chamber (20),

   b) a conveying means (28, 84) by means of which the articles (12) may be conveyed into the treatment chamber (20) and out of it again,
   characterised in that

   c) the conveying means (28, 84) comprises a conveying element (28) by which a first surface (76) having a first holding means (80) for at least one article (12) and at least one second surface (78) having a second holding means (82) for at least one article (12) is provided,
   wherein

   d) the first and the second surface (76, 78) are arranged such that the first or the second surface (76, 78) delimits the treatment room (20) at least in certain regions in dependence on the position of the conveying element (28).
2. A system according to Claim 1, characterised in that the conveying element (28) is a rotary element (28) that may be rotated about an axis of rotation (30).
3. A system according to Claim 2, characterised in that the rotary element (28) is a rotary wall (28) associated with the treatment chamber (20) and having a first wall surface (76) and a second wall surface (78) which is opposed to the latter.
4. A system according to Claim 2 or 3, characterised in that the axis of rotation (30) extends vertically.
5. A system according to one of Claims 1 to 4, characterised in that a means (77, 79) is provided by means of which a separating liquid for taking up overspray that is produced in the painting chamber may be supplied to the first surface (76) and/or the second surface (78) of the conveying element (28).
6. A system according to one of Claims 1 to 5, characterised in that the conveying element (28) does not seal off the treatment chamber (20) in gas-tight manner in a position in which the first or the second surface (76, 78) delimits the treatment chamber (20) at least in certain regions.
7. A system according to one of Claims 1 to 6, characterised in that transport means (90) are provided by means of which articles (12) may be supplied to the holder means (80, 82) at the surface (76, 78) of the conveying element (28) that is respectively not delimiting the painting chamber (20) in certain regions, or may be removed from this holder means (80, 82).
8. A system according to Claim 7, characterised in that the transport means (90) comprise a transfer robot (90) for transferring articles (12).
9. A system according to Claim 8, characterised in that the transfer robot (90) is arranged to be fixed in position.

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