DE102015013183A1 - Apparatus and method for treating workpieces - Google Patents

Abstract

The invention relates to a dip treatment plant (1) for treating workpieces and to a process for treating workpieces in the dip treatment plant (1) with a treatment tank (3) for receiving a treatment liquid (5) and a circulation system (6) with a nozzle arrangement (14). for inflating the workpiece (4a). According to the invention, a nozzle arrangement (14) is provided which is designed to be adjustable between two working positions. Preferably, the dipping treatment plant (1) is used to coat bodies (4a) with a dipping varnish (5) during an electrocoating process.

Description

The present invention relates to a dip treatment plant for treating workpieces by immersion in a treatment liquid with a treatment vessel for receiving the treatment liquid and a circulation system with a nozzle arrangement for flow of the workpiece.

There are generic immersion treatment plants are known in which a immovably configured nozzle assembly is provided which generates turbulent flow conditions on the surface of the workpiece. In this case, there is an interaction of the immovably designed nozzle arrangement with the workpiece, which is guided along a predefined path through the treatment container. Depending on the movement and the positioning of the workpiece results in a certain flow situation. The path of the workpiece is often not very variable. This results in a limitation in the individual optimization of the flow situation. In extreme cases, this leads to insufficient turbulence, selective dead water areas and low flow velocities at the workpiece surface.

The present invention has for its object to provide a dip treatment plant, in which the flow situation on the workpiece can be influenced individually.

To achieve the object, a generic immersion treatment plant is proposed according to the invention, in which a nozzle arrangement is provided, which is configured adjustable between two working positions.

The dipping treatment plant comprises a conveyor system with a transport unit and a drive unit. With the help of the conveyor system, a workpiece can be moved. In this case, a workpiece is first arranged on a transport unit. By means of drive system, the transport unit is then brought to the treatment tank. The workpiece is, for example, by a rotation, tilting and / or lifting / lowering movement of the transport unit, immersed in the treatment vessel and the treatment liquid therein. In the partially or preferably completely submerged state, the workpiece is optionally moved through the treatment tank and the treatment liquid.

A conveyor system may in particular be designed as a monorail system. A monorail system includes a track assembly and a workpiece fixture. The receiving device is arranged hanging on the rail assembly. A workpiece can be releasably fixed to the receiving device. The receiving device is preferably moved together with the workpiece fixed thereto along the rail arrangement.

The treatment container arranged in the dip treatment plant and optionally at least partially filled with a treatment liquid preferably comprises a bottom element and a plurality of wall elements. At its top, the treatment tank is at least partially open. The treatment container is preferably dimensioned so that at least one or more workpieces can be completely immersed in the treatment liquid arranged in the treatment tank. Particularly preferably, the inner dimensions of the treatment container, preferably its length and width, are selected so that one or more workpieces can be completely introduced into the treatment container. In this case, a workpiece is optionally at least temporarily completely within the treatment container. In addition, the height of the treatment tank is preferably selected such that a workpiece can be completely immersed in the treatment liquid arranged in the treatment tank.

The optionally disposed in the treatment tank treatment liquid comprises one or more liquid and / or solid components. The treatment liquid serves to change surface properties of the workpiece. For this purpose, the treatment liquid interacts with the surface of the workpiece, in particular in contact. For this it is necessary that the surface of the workpiece is sufficiently wettable by the treatment liquid. The treatment liquid is preferably a liquid coating material which serves to coat the workpiece surface. In this case, at least part of the coating material is deposited on the surface of the workpiece. By way of example, such a coating can fulfill a protective and / or decorative function by protecting the workpiece from influences by media from the environment or by imparting a specific color to the workpiece.

The circulatory system includes one or more nozzle assemblies, a conduit assembly and a pump unit. The circulatory system is at least partially disposed in the treatment tank and / or in the treatment liquid. With the aid of the pump unit, the treatment liquid can be conducted in a circuit from the treatment tank via the line arrangement and a nozzle arrangement back into the treatment tank. The Components of the circulatory system are preferably connected to each other largely liquid-tight.

A nozzle assembly communicates with the conduit assembly and includes at least one nozzle member through which the recirculating treatment fluid flows directed into the treatment container. The nozzle arrangement can be adjusted between at least two working positions. Due to the adjustable configuration, a flow can be generated in a specific area and / or in a specific section of the treatment tank.

In a (first) working position, a nozzle arrangement has a specific position and / or spatial position within the treatment container and / or a specific orientation. In a second working position, a nozzle arrangement has a different position and / or spatial position within the treatment container and / or a different orientation than in the first working position.

The nozzle assembly can be adjusted manually or automatically and optionally with a mechanical and / or electrical device between two or more working positions.

In an embodiment of the invention, a position of the nozzle arrangement is translationally and / or an orientation of the nozzle arrangement formed rotatably variable.

When translationally changing a position and / or a spatial position, the nozzle arrangement can be moved on an at least optionally approximately straight connecting line between the working positions. The nozzle arrangement is preferably displaced spatially. The position in space, in particular relative to the treatment container and / or relative to the path of movement of a workpiece is changed. Thereby, the distance between the nozzle assembly and a workpiece passing the nozzle assembly can be adjusted.

Alternatively or additionally, a distance between the nozzle arrangement on the one hand and a bottom and / or a wall element of the treatment tank on the other hand can be set by translationally changing the position and / or the spatial position.

When rotationally changing an orientation, the nozzle arrangement can be moved by rotation, in particular about a longitudinal axis of the nozzle arrangement, preferably about a central longitudinal central axis, between the working positions. The nozzle arrangement, in particular its approximate center of mass, optionally remains at approximately the same position relative to the treatment container and / or relative to the movement path of a workpiece.

When adjusting the nozzle arrangement, a position or an orientation of the nozzle arrangement is preferably changed. Optionally, when adjusting between two working positions, a position and orientation of a nozzle assembly can be changed.

In a further embodiment of the invention, a line arrangement of the circulatory system comprises a line section, wherein the orientation of the line section by rotation and the position of the nozzle arrangement is designed to be variable by translation relative to the treatment vessel.

The line arrangement comprises one or more line sections through which the treatment liquid can be passed. If the line arrangement comprises several line sections, these can preferably be connected to one another in a liquid-tight and / or detachable manner.

The orientation of a line section can be changed, for example, by first temporarily releasing a connection between this line section on the one hand and a further line section, a nozzle arrangement and / or a wall element on the other hand, and subsequently restoring it in a modified orientation. In this case, the orientation of the line section relative to the further line section, the nozzle arrangement and / or the wall element is changed by rotation about an axis of rotation.

Optionally, further circulation systems and / or nozzle arrangements may be provided in the treatment tank.

If a plurality of circulation systems and / or nozzle arrangements are present, they can differ, for example, in the volume flows that can escape from a nozzle element.

Alternatively or additionally, the circulation systems and / or nozzle arrangements may differ in the ranges of one or more nozzle elements.

Alternatively or additionally, the circulation systems and / or nozzle arrangements may differ in their position and / or their orientation in the treatment tank.

The alignment of a line section can be done by a movement in which superimpose a rotation and a translation.

The adjustment of a position of a nozzle arrangement can be effected by a movement in which a rotation and a translation are superimposed.

Optionally, a floor flood system is provided. A floor flood system has at least one bottom flood nozzle, which is aligned such that a main flow direction of a treatment liquid emerging from the floor flood nozzle is aligned at least approximately parallel to a bottom element of the treatment tank. With the aid of a soil flood system, it is possible to reduce the sedimentation of solid particles of the treatment liquid on the bottom of the treatment tank. A floor flood system may be part of the same circulatory system that also includes the nozzle assembly. Optionally, the soil flood system may be part of a separate circulatory system, with a corresponding dip treatment plant then comprising two or more circulatory systems.

Furthermore, an optional side flood system is provided. A side flood system has at least one side flood nozzle, which is oriented such that a main flow direction of a treatment liquid emerging from the side flood nozzle is aligned in the direction of a side part of the workpiece passing through the side flood nozzle. A side flood system may be part of the same circulatory system that also includes the nozzle assembly and / or the floor flood system. Optionally, the side flood system may be part of a separate circulatory system, with a corresponding dip treatment plant then comprising two or more circulatory systems.

Optionally, an adjustably configured nozzle arrangement comprises an adjusting device. An adjusting device adjusts a nozzle arrangement between two or more working positions. In this case, a force required for the adjustment is optionally provided by an electric drive element and preferably transmitted mechanically to the nozzle arrangement. The adjustment can be done manually or automatically. For example, an operator may initiate the adjustment by entering a command into an input device. Alternatively or additionally, the adjustment can receive the command for the adjustment of a central control and / or regulating device of the dip treatment plant.

The present invention furthermore relates to a method for treating workpieces by means of immersion in a treatment container filled with a treatment liquid, in which a workpiece is supplied with treatment liquid by means of a nozzle arrangement of a circulation system.

A further object of the present invention is to provide a method for treating workpieces, in which the flow situation on the workpiece can be influenced particularly well.

This object is achieved by a generic method for treating workpieces in a dip treatment plant. The dip treatment plant comprises a treatment tank with a treatment liquid arranged therein and a circulation system with a nozzle arrangement which is adjusted between two working positions. A workpiece is immersed in the treatment liquid and is supplied with treatment liquid by means of the nozzle arrangement.

In the dipping treatment plant workpieces are treated by immersion in the treatment liquid. The treatment liquid interacts with the surface of the workpieces to be treated and can for example influence the surface properties of a workpiece and / or form a layer on the surface of a workpiece.

The dip treatment plant further comprises a conveyor system for conveying workpieces. A workpiece is conveyed by means of the conveyor system to the treatment vessel, immersed in the treatment liquid and dipped again and conveyed away from the treatment tank.

The treatment container comprises a bottom element and one or more wall elements. The bottom element and one or more wall elements are arranged and connected to one another in such a way that the treatment container forms a largely liquid-tight and upwardly preferably open vessel, which is filled with treatment liquid during operation.

The circulation system comprises, in addition to one or more nozzle arrangements, a line arrangement with one or more line sections and a pump unit. By means of the pump unit is conveyed through the line arrangement treatment liquid in the circulation, that is removed from the treatment tank and this fed back to another location via a nozzle assembly.

A nozzle arrangement is adjustable and comprises at least one nozzle element, via which the circulating promoted treatment liquid can escape from the nozzle assembly. A nozzle arrangement can be adjusted from one working position to another working position. The Working positions of a nozzle arrangement differ, for example, in a position of the nozzle arrangement and / or in an alignment of the nozzle arrangement and / or a nozzle element.

In order to move a nozzle arrangement from one working position to another working position, first certain connecting elements between at least part of the components of the circulatory system are released. Subsequently, individual components, among them preferably the nozzle arrangement, can be transferred to another position and / or in a different orientation and reconnected to one another.

The treatment of a workpiece by means of the method according to the invention proceeds as follows.

The pump unit sucks in treatment liquid from the treatment tank and conveys it through the line arrangement to the nozzle arrangement. The treatment liquid exits the nozzle assembly via a nozzle member and returns to the treatment container along a direction determined by the orientation of the nozzle assembly and / or the nozzle member.

A workpiece is moved by means of conveyor system through the treatment vessel and thereby passes the at least temporarily stationary arranged nozzle assembly. In this case, the treatment liquid emerging from the nozzle arrangement impinges on the surface of the workpiece. When the treatment liquid impinges on the surface, the workpiece is at least partially thermally, chemically and / or mechanically conditioned by the treatment liquid. Preferably, the treatment liquid ruptures when it hits the surface adhering particles or gas bubbles.

In a further embodiment of the invention, the adjustment of the nozzle arrangement changes the distance of the nozzle arrangement to a bottom and / or to a wall element of the treatment container.

In this case, the distance between the nozzle arrangement and a workpiece is preferably changed since the workpiece is conveyed along a movement path that is largely static relative to the treatment container through the dipping treatment system.

In a further embodiment of the invention, adjusting the nozzle assembly is followed by a change of the workpiece type.

In the dip treatment plant, several types of workpieces can be treated. The workpiece types differ, for example, in their shape, their contour and / or their dimensions. For example, after a first type of workpiece has passed the nozzle assembly, an adjustment of the nozzle assembly may occur if a second type of workpiece next passes the nozzle assembly. In particular, a minimal distance between the nozzle arrangement and the workpiece to be treated can be influenced, preferably adjusted.

In such a dip treatment plant can optionally be treated more than two different types of workpieces, for example, three, four or more. Preferably, a nozzle arrangement for different workpiece types on different working positions.

In the drawings show:

1 in a schematic representation of a longitudinal section at the point I of 2 by a dip treatment plant according to a first embodiment;

2 in a schematic representation of a cross section at the point II of 1 through the dip treatment plant according to the first embodiment;

3a in a schematic representation of a section of the cross section of 2 with a nozzle assembly in a first working position;

3b in a schematic representation of a section of the cross section of 2 with the nozzle assembly in a second working position;

4 in a schematic representation of a side view of a third line section;

5 in a schematic representation, a longitudinal section at the point V of 6 by a dip treatment plant according to a second embodiment;

6 in a schematic representation of a cross section at the point VI of 5 by the dip treatment plant according to the second embodiment.

Identical or functionally equivalent elements are provided with the same reference numerals in all figures.

In the 1 to 4 is a dip painting plant 1 equipped immersion treatment plant for treating different types of workpieces in the form of different bodies types 4a . 4b shown according to a first embodiment. The dip painting facility 1 includes a conveyor system 2 , one with a treatment liquid in the form of a dip 5 filled treatment tank as well as a circulatory system 6 , The treatment tank is designed as an upwardly open basin 3 designed.

The in the Tauchlackieranlage 1 to be painted body types 4a . 4b differ in the outer dimensions. A first body type 4a is designed, for example, as a van body. A second body type 4b is designed, for example, as a limousine body. The van body is longer, wider and taller than the sedan body.

The conveyor system 2 has a drive unit 7 as well as a transport unit 8th on. On the transport unit 8th can be a first body type 4a or a second body type 4b be set releasably. By means of drive unit 7 becomes the transport unit 8th together with body fixed on it 4a . 4b in a conveying direction 11 along the basin 3 promoted.

The basin 3 includes a floor element 9 and four wall elements 10 , which are permanently and liquid-tightly connected.

The dip 5 comprises a binder and a solvent and optionally one or more additives. The basin 3 is with the dip paint 5 filled. The dip 5 is used as part of the treatment process by immersing the bodies to be painted 4a . 4b deposited on their surfaces.

The circulatory system 6 has a pump unit in the form of a rotary piston pump 12 , a line arrangement 13 and a nozzle assembly 14 on. The line arrangement 13 includes several line sections 17a . 17b . 17c , The pipe sections 17a . 17b . 17c , the rotary piston pump 12 and the nozzle assembly 14 are releasably and fluid-tightly connected to each other by means of abutting and bolted together flange plates.

The nozzle arrangement 14 includes several nozzle elements 22 and is in one with respect to the direction of gravity 15 lower part of the pelvis 3 , inside the dip 5 arranged. The upper area of the basin 3 , above the nozzle assembly 14 and within the dip 5 , is thus available to bodies 4a . 4b in the immersed state by the basin 3 to promote and dipping the paint 5 to deposit on the surface.

The nozzle arrangement 14 Optionally an adjustable support element 16 comprising the nozzle assembly 14 at their free, from the nearest line section 17c opposite end on the floor element 9 and / or on a wall element 10 supported.

The first line section 17a and the second line section 17b as well as the rotary piston pump 12 are outside the basin 3 arranged. The third line section 17c and the nozzle assembly 14 are inside the basin 3 arranged. The inside and outside of the basin 3 arranged components are about two openings 18a . 18b in a wall element 10 of the pelvis 3 fluidically interconnected.

The third line section 17c has two deflection areas 20a . 20b on. The dip 5 is doing after entering the third line section 17c in the first deflection area 20a 90 ° deflected. In the second deflection area 20b is the dip paint 5 again deflected 90 °. The entry vector 21a a flow direction 19 when entering the third line section 17c and the exit vector 21b the flow direction 19 at the exit from the third line section 17c are aligned parallel to each other and point in the same direction.

In a modified embodiment, a deflection takes place by less than 90 °, preferably by an amount between 10 ° and 90 °.

The dip 5 can be partially from the basin 3 removed and by means of the rotary piston pump 12 through the pipe sections 17a . 17b . 17c and the nozzle assembly 14 back to the basin 3 be guided. The immersion paint flows through it 5 in the flow direction 19 successively first a first opening 18a in a wall element 10 , a first line section 17a , the rotary piston pump 12 , a second line section 17b , the second opening 18b in the wall element 10 , a third line section 17c and the nozzle assembly 14 and leaves the circulatory system via the nozzle elements 22 ,

The nozzle arrangement 14 is designed adjustable between two working positions, so that position and / or orientation of the nozzle assembly 14 and / or the nozzle elements 22 can be influenced.

The dip painting facility 1 according to the first embodiment works as follows.

A transport unit 8th is fixed together with the first body type 4a by means of a drive unit 7 to the pelvis 3 promoted, along the basin 3 moved and then from the pelvis 3 conveyed away.

While the transport unit 8th along the basin 3 being moved may be the first body type 4a at least temporarily and preferably completely in the dip 5 be immersed.

The first body type 4a is doing with dip paint 5 flowed through the nozzle elements 22 directed from the nozzle assembly 14 exit.

Is in operation of the dip painting 1 a change of the body type of the first body type 4a to the second body type 4b on, so the nozzle assembly 14 transferred from a first working position to a second working position before such a change.

For adjusting the nozzle arrangement 14 from the first working position to the second working position, the dip is first applied 5 at least partially from the basin 3 away. The remote dip paint 5 is discarded, or stored for example in one or more compensating containers, not shown.

Subsequently, the connection between the nozzle assembly 14 and the third line section 17c and the connection between the third line section 17c and the wall element 10 solved.

The orientation of the third line section 17c is then rotated 180 degrees about a first axis of rotation 23a changed. The first rotation axis 23a pierces the center of the cross-sectional area of the third conduit section 17c at its flow inlet end and is aligned perpendicular to this cross-sectional area.

The third line section 17c is then back to the wall element 10 connected.

The nozzle arrangement 14 becomes in the same spatial orientation as before with the third line section 17c connected.

The length of an optionally available adjustable support element 16 can affect the new distance between nozzle assembly 14 on the one hand and floor element 9 and / or wall element 10 on the other hand be adapted.

The nozzle arrangement 14 Thus, when transferring from the first working position to the second working position, a change in the position, and thus the spatial position, while the alignment in both working positions is the same. This means that the vectors of the over the nozzle elements 22 from the nozzle assembly 14 exiting dipping varnish 5 are largely aligned parallel to each other in the two working positions.

After that, the pelvis 3 again with dip paint 5 filled and painting a second-type body 4b may happen.

By adjusting the nozzle arrangement 14 between different working positions can be a distance between a body 4a . 4b and a nozzle assembly 14 on the one hand and / or between the pelvis 3 and a nozzle assembly 14 on the other hand, adjusted so that gas bubbles that are on the body when immersed 4a . 4b collected with the help of the nozzle assembly 14 outgoing dipping paint 5 can be displaced.

Optionally, the nozzle assembly experiences 14 when adjusting between two working positions in addition to a change in the spatial position / situation also an alignment change. For this, the nozzle arrangement 14 after releasing the connection to the third line section 17c around a second axis of rotation 23b which preferably rotates on a central longitudinal axis of the nozzle arrangement 14 lies. Subsequently, the nozzle assembly 14 again with the third line section 17c connected. An alignment change of the nozzle assembly 14 when changing from one working position to another working position preferably causes a change in the orientation of a nozzle member 22 the nozzle assembly 14 ,

In a further modified embodiment, the third line section 17c by an amount between 0 ° and 360 ° around the first axis of rotation 23a to be turned around.

In a further modified embodiment, the nozzle arrangement 14 by an amount between 0 ° and 360 ° about the second axis of rotation 23b to be turned around. Optionally more than two working positions can be provided.

In the 5 and 6 is shown a dip treatment plant according to a second embodiment. This dipping treatment plant is likewise as Tauchlackieranlage 1 designed and differs from the Tauchlackieranlage according to the first embodiment essentially in that a plurality of nozzle arrangements 14 as well as several floor flood systems 24 and a side flood system 25 are provided, with which the dip 5 each directed can be delivered.

The nozzle arrangements 14 In their structure and function, they are largely the same as in the first embodiment described nozzle arrangement 14 , The nozzle arrangements 14 are in with respect to the direction of gravity 15 lower part of the pelvis 3 in the conveying direction 11 arranged one behind the other and largely parallel to each other. One along the basin 3 promoted body 4b happens the nozzle arrangements 14 one after the other, crossing the flow of the nozzle assemblies 14 exiting dipping varnish 5 , In particular, with such nozzle arrangements 14 Gas bubbles are removed from the surface of the bodies to be painted. Gas bubbles may be air bubbles and / or bubbles of an electrolysis gas. An electrolysis gas is a gas that may be generated during an electrodeposition process. It may be, for example, hydrogen gas.

The nozzle arrangements 14 are part of a circulatory system 6 , Optionally, also several circulatory systems 6 be provided, in particular a circulatory system 6 for each nozzle arrangement 14 ,

Furthermore, there are several floor flood systems 24 with floor flood nozzles 26 provided that like the nozzle arrangements 14 with respect to the direction of gravity 15 lower part of the pelvis 3 are arranged.

The distance of the floor flood systems 24 to the floor element 9 is preferably less than the pitch of the nozzle assemblies 14 to the floor element 9 ,

The distance of the floor flood systems 24 to an interface 27 between the dip 5 and the atmosphere is preferably greater than the pitch of the nozzle assemblies 14 to this interface 27 ,

In addition, the bottom flood nozzles point 26 a different orientation than the nozzle arrangements 14 , The one from the floor flood jets 26 exiting dip 5 flows essentially parallel to the soil element 9 of the pelvis 3 and / or towards the floor element 9 , and reduces the sedimentation of particles of the dipping paint 5 , such as solids, at the bottom of the basin 3 ,

In a dip painting facility 1 according to the second embodiment is in the conveying direction 11 after a nozzle arrangement 14 adjacent to this a floor flood system 24 provided, with this arrangement in the conveying direction 11 in a longitudinal direction of the pelvis 3 repeated several times. The conclusion forms a nozzle arrangement 14 , Thus, a total of six nozzle arrangements 14 and five floor flood systems 24 intended.

In a modified embodiment, the nozzle arrangements 14 and the floor flood systems 24 but also arranged differently and / or be provided in a different number. For example, in one area of the basin 3 in which bodies 4a . 4b be immersed (preferably in an initial area of the basin 3 ) several adjacent Bodenflutsysteme 24 be provided. In addition, in such a modified embodiment, in a region of the basin 3 in which bodies 4a . 4b be immersed (preferably in an end region of the basin 3 ) Also several adjacent Bodenflutsysteme 24 be provided. In an area of the basin 3 between the starting area and the end area, in the bodies 4a . 4b preferably be moved in the immersed state (preferably in a central region of the basin 3 ), may be provided in such a modified embodiment, that in the conveying direction 11 on a nozzle assembly 14 a floor flood system 24 follows, and that this arrangement is within the central region in the conveying direction 11 repeated several times.

Furthermore, a side flood system 25 with side flood nozzles 28 intended. The side flood system 25 is on a wall element 10 of the pelvis 3 set and is located in the vertical direction at about the same height with a body 4b if this in the dip 5 is immersed and through the basin 3 is moved. The side flood nozzles 28 are so in the interior of the basin 3 aligned that out of the side tuyeres 28 exiting dip 5 the trajectory of a side flood system 25 passing body 4b cuts.

In a further modified embodiment, the side flood system 25 and / or the floor flood system 24 configured adjustable between several working positions.

In a further modified embodiment, there are several side flood systems 25 provided, which are preferably set in the conveying direction successively to one or more wall elements of the basin.

In another modified embodiment, the nozzle assemblies take 14 in the central area a working position with a greater distance to the floor element 9 and with a smaller distance to the interface 27 between the dip 5 and the atmosphere as the nozzle arrangements 14 in the immersion area and in the immersion area. Such a configuration is for example advantageous if in the dip painting 1 bodies 4a . 4b by a rotational movement in the pelvis 3 be applied to or from this. This makes it possible, in the immersion area and in the exchange area, to generate a free turning circle in each case in order to collide a body 4a . 4b with a nozzle arrangement 14 to avoid.

The dip painting facility 1 According to the second embodiment works much the same as the Tauchlackieranlage 1 according to the first embodiment, which is why reference can be made in terms of function to the description of the first embodiment.

A transport unit 8th will be there along with fixed body 4b by means of a drive unit 7 to the pelvis 3 promoted, along the basin 3 moved and then from the pelvis 3 conveyed away.

While the transport unit 8th along the basin 3 is moved, the body can 4b at least temporarily, preferably completely in the dip 5 be immersed.

The body 4b is in the immersed state of the in the conveying direction 11 successively arranged nozzle arrangements 14 and at the side tuyeres 28 moved past while doing dipping 5 incident flow.

The floor flood nozzles 26 simultaneously generate a flow in the area of the floor element 9 and reduce there the sedimentation of solid particles of the dipping paint 5 ,

Shall after this body 4b a body are treated with a different dimensioning in the Tauchlackieranlage, then the nozzle arrangements 14 optionally adjusted from one working position to another working position. It can for the nozzle arrangements 14 For example, proceed as in the (a) nozzle assembly 14 the dip painting facility 1 according to the first embodiment.

LIST OF REFERENCE NUMBERS

1

dip coating

2

conveyor system

3

pool

4a

First body type

4b

Second body type

5

paint

6

Circulatory system

7

drive unit

8th

transport unit

9

floor element

10

wall element

11

conveying direction

12

Rotary piston pump

13

line arrangement

14

Nozzle arrangement (s)

15

The direction of gravity

16

support element

17a

First line section

17b

Second line section

17c

Third line section

18a

First opening

18b

Second opening

19

Flow direction

20a

First deflection area

20b

Second deflection area

21a

Entry vector

21b

Exit vector

22

nozzle member

23a

First rotation axis

23b

Second rotation axis

24

Ground flood system (s)

25

Page flood system

26

Ground flood nozzles

27

interface

28

Page flood nozzles

Claims (6)

Dipping treatment plant ( 1 ) for treating workpieces ( 4a . 4b ) by immersion in a treatment liquid ( 5 ), with - a treatment container ( 3 ) for receiving the treatment liquid, - a circulatory system ( 6 ) with a nozzle arrangement ( 14 ) for flow of the workpiece with treatment liquid, wherein - the nozzle assembly is configured adjustable between two working positions. Dipping treatment plant ( 1 ) according to claim 1, characterized in that a position of the nozzle arrangement ( 14 ) are translationally and / or an orientation of the nozzle assembly formed rotatably changeable. Dipping treatment plant ( 1 ) according to one of claims 1 or 2, characterized in that a line arrangement ( 13 ) of the circulatory system ( 6 ) a line section ( 17c ), wherein the orientation of the line section by rotation and the position of the nozzle arrangement ( 14 ) by translation relative to the treatment tank ( 3 ) are designed changeable. Process for treating workpieces in a dipping treatment plant ( 1 ) with a in a treatment container ( 3 ) arranged treatment liquid ( 5 ), comprising the following method steps - adjusting a nozzle arrangement ( 14 ) of a circulatory system ( 6 ) between two working positions - dipping a workpiece ( 4a . 4b ) into the treatment liquid, - flow of the workpiece with treatment liquid by means of the nozzle assembly. Method according to claim 4, characterized in that the adjustment of the nozzle arrangement ( 14 ) the distance of the nozzle arrangement to a floor and / or to a wall element ( 9 . 10 ) of the treatment container ( 3 ) changed. Method according to one of claims 4 or 5, characterized in that the adjustment of the nozzle arrangement ( 14 ) a change of the workpiece type ( 4a . 4b ) follows.

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