WO1997003760A2

WO1997003760A2 - Installation for coating the surfaces of workpieces

Info

Publication number: WO1997003760A2
Application number: PCT/EP1996/003181
Authority: WO
Inventors: Helmut Gohl
Original assignee: Eisenmann Maschinenbau Kg
Priority date: 1995-07-21
Filing date: 1996-07-18
Publication date: 1997-02-06
Also published as: WO1997003760A3; PL320752A1; EP0840652A2; ES2181906T3; DE19526613A1; PL184099B1; DE59609760D1; ATE225210T1; DE19526613C2; EP0840652B1

Abstract

The invention relates to an installation (A) for coating the surfaces of workpieces, in particular vehicle bodies or body parts, the installation (A) enabling the coating material or the type of coating to be changed from one coating to the next, e.g. one or several changes between coating powder and liquid paint, while a batch of workpieces or a single workpiece passes through the installation (A).

Description

Plant for surface reduction of workpieces

The invention relates to a system for the surface finishing of workpieces according to the preamble of claims 1 and 2, and is intended in particular for the coating of vehicle bodies or body parts.

In known systems of the type, different layer systems or

ERSÄΓZBLÄΠ (RULE 26) the individual layers of such a layer system each require separate cabin systems. This results in a much larger, often twice the space requirement, a double material supply and disposal and a double supply and exhaust air routing, i.e. a considerable technical and economic outlay.

Therefore, the object of the invention is above all to create a system for surface finishing of workpieces, in particular for vehicle bodies, in which different types of coating, e.g. Wet lacquer and powder lacquer coating, in batches one after the other or in succession on a workpiece, can be carried out without having to change the system and, at the same time, the technical-economic outlay can be optimized.

The object is achieved by a system for surface finishing of workpieces according to claim 1 or 2, which are essentially characterized by the respective characteristic features.

The subordinate, dependent claims 3 to 10 disclose further developments of the inventive

SPARE BLADE (RULE 26) Basic ideas or advantageous design variants of these.

The system designed according to the invention for the surface finishing of workpieces provides the following advantages, in particular for those for coating car bodies and the like. Large workpieces:

- significantly less space required,

- lower technical-economic effort, since a large number of construction parts and groups are only required once,

- Due to the flexible system design, rapid adaptation to short-term changes in the marketing concept of the workpiece in question, e.g. Paint type and color for car bodies, possible, and the system according to the invention permits variable use of materials as well as a flexible, part-time arrangement based on technology and material;

This created a very economical system.

SPARE BLADE (RULE 26) The invention will now be explained in more detail with reference to advantageous exemplary embodiments shown schematically in the drawings. Show:

1 shows a plan view of a system cut in the ceiling area of the ground floor with a view of the various system areas and zones, and FIGS. 2 to 4 in longitudinal or cross-section the structure of a powder-Z wet lacquer cabin according to the invention.

1 shows an advantageous design of a system A for the surface finishing of workpieces W, in particular vehicle bodies, in which a preparation area B and an area of the surface finishing E are preferably arranged next to one another in the longitudinal direction construction of the latter E essential to the invention, successively in the longitudinal direction, into an application zone G, a section with a plurality of cross conveyors Q1, Q2 and Q3, a drying zone H, a section with at least one cross conveyor Q4, Q5, in which preferably another Buffer zone P lies, a testing and completion

ERSÄΓZBLÄΓT (RULE 26) zone J and a transfer zone K with a sorting station L and a transfer station M and is equipped with the appropriate technology.

On the front side, structurally separated, there are supply facilities such as Media supply, material storage etc. receiving areas C and D provided. The preparation area B, the area of the surface finishing E, and also the installation A itself are enclosed by known, building-like wall structures 1, 2 and 3, respectively.

Furthermore, in essential and special training it is provided that the drying zone H containing at least one dryer H1 or H2 or H3 is preceded by at least two application devices G1 ... G3b that at least one after the dryer H1, H2 or H3 or after the following test and completion zone J beginning and fed by at least one cross conveyor Q4 or Q6 located there, second or third conveyor path F2 or F3 laterally past the dryer H1, H2 or H3 is led to at least one of the application devices Gl, ... or G3b.

SPARE BLADE (RULE 26) A further version of the basic concept of the same rank and equivalent, alternative and generic to the generic term of the preceding solution, is characterized in such a way that at least one of the application devices G1,... G3b provided in the application zone G has a combined powder-Z wet paint booth GK is, which each have a first separator 11 for wet paint and a second separator 12 for powder paint, both separators 11 and 12 are held and displaceably guided 13 in the lower part 6, and that these separators 11 and 12 for optional, alternating docking with the Air-permeable bottom 7 of the powder-Z wet paint booth GK and the exhaust device 10 are formed, see FIGS. 2 to 4.

Sealing is preferably carried out with a pneumatically controllable hose, ring or sealing lips.

For both of the basic variants described above, it applies equally that at least one of the application devices Gl,... G3b is designed in relation to the others, for the application of a surface finishing substance that is different in terms of its nature and nature, or for another finishing method. In a further special design, the second basic variant now provides for the separating devices 11 and 12 to be displaceably guided 13 in the longitudinal direction of the cabin and preferably coupled to one another, and for the air-permeable bottom 7 of the powder-Z wet lacquer cabin GK to be in one The longitudinal direction of the cabin and preferably in the middle area has the approximately U-shaped or V-shaped channel 8, which is sealed off from the separating devices 11 and 12 and lowered with respect to the level of the floor 7, the conveying path F1, F2a or F3a runs. The channel 8 is preferably irrigated.

In a further embodiment, the separating devices 11 and 12 can be displaceably guided 13 in the transverse direction of the cabin, and the separating devices 11 and 12 can be provided several times, preferably as a 3 or 4 combination.

It is particularly advantageous to use the two equivalent basic variants of the invention described above in one installation, e.g. 1, whereby, depending on the customer order and wishes, one or more of the application devices Gl ... G3b as a combined powder-Z

SPARE BLADE (RULE 26) GK wet paint booth can be trained.

The system according to FIG. 1 is further and particularly characterized by the combination of the following features:

a) The application zone G has a first application device G 1, which is passed through a first conveying path F 1 coming from the preparation area B and which is arranged by means of a downstream one

Cross conveyor Ql has connection to a dryer Hl,

b) in addition to the application device G1, further application devices G2a, G2b and G3a, G3b are arranged in pairs, each of which is successively passed through by a conveyor path section F2a or F3a,

c) the recirculated second or third conveying path F2 or F3, which runs laterally through the drying zone H, opens into the front application device G2a or G3a, while the following application path along the conveying path F2a or F3a ¬ device G2b or G3b with the interposition of a further cross conveyor Q2 or Q3 has a connection to a dryer H2 or H3, and

SPARE BLADE (RULE 26) d) the dryers Hl to H3 are of multi-lane design, these dryers Hl to H3 preferably each comprising an evaporation and drying section, a stoving section and a cooling section.

In a further development of the invention, the system according to FIG. 1 now also provides that between the cross conveyor Q4 arranged downstream of the dryers H1, H2, H3 and the testing and completion zone J, the latter faces J and faces that J connected, a buffer zone P and a further cross conveyor Q5 are arranged.

Finally, in addition to the powder-Z wet lacquer cabin GK shown in FIGS. 2-4 and which can be used in a system according to FIG. 1, the head part 4 includes the supply air devices in a known manner, the middle part 5 here with means for applying wet - and powder coating is provided, the lower part 6 is designed in accordance with the above embodiments with various insertable separating devices 11 and 12, and the combined powder-Z wet coating booth GK is known in each case by means of a frame-like substructure 9 on a floor N. is set up.

SPARE BLADE (RULE 26) Since the method of preparation, drying, testing and reworking of such systems is known per se, there is no need for such a description here; It is only to be emphasized that, in preparation for a dye and powder change, only a corresponding cleaning cycle is carried out by means of the wet part 11 of the powder-Z wet lacquer booth GK and after the latter the predetermined separation device 11 or 12 is placed under the middle part 5 of the combined powder Z GK wet paint booth is inserted.

This new system according to the invention is characterized in particular by its versatility, low structural and technical outlay and little changeover effort for changing the coating material and the type of coating. For example, the application device G1 for the application of a base coating and the application devices G2 ... G3b for the application of a filler, base or first and possibly second topcoat or a final clearcoat are provided and designed as cabins.

By incorporating one or more powder Z wet coating booths KG according to claim 1 and FIGS. 2 to 4 in the application zone G, Gl ... G3b is with low technical effort, the application of powder and wet paint in the most varied order can be carried out in a system or a quick, inexpensive changeover of the system to batch-wise powder or wet paint coating is possible, whereby the means for painting, e.g. spraying devices, can be manually and manually operated are. In addition, the known means provided for the powder coating in the middle part 5 of a powder-Z wet coating booth KG are designed in such a way that different types of powder can be used by switching to another powder cycle.

Furthermore, it is within the scope of the invention in which

Application device Gl or in one or more of the following application devices G2 ... G3b a coating in the plunge pool, flood system or the like. to perform, or even an electrophoresis bath or the like to be used for priming or decorative surface finishing with possibly subsequent single or multi-layer top and Z or clear lacquer sealing.

SPARE BLADE (RULE 26)

Claims

claims

1. Plant for the surface finishing of workpieces, in particular vehicle bodies, with several

Areas such as preparation and surface finishing, the latter in turn being subdivided into the application zone, drying zone, finishing zone and conveyor sections, which are equipped with appropriate technology,

characterized, that the drying zone (H) containing at least one dryer (Hl or H2 or H3) is preceded by at least two application devices (Gl, ... G3b), that at least one, after the dryer (Hl, H2 or H3) or according to the following testing and finishing zone (J) incipient and located at least one and there Querförde¬ rer (Q4 and fed Q6), second and third ^"conveyor (F2 or the side of the F3) Dryer (Hl, H2 or H3) is returned to at least one of the application devices (Gl, ... or G3b).

2. Plant for the surface finishing of workpieces, in particular vehicle bodies, with several areas such as preparation and surface finishing, the latter in turn being subdivided into the application zone, drying zone, finishing zone and conveyor sections, which are equipped with appropriate technology,

characterized,

SPARE BLADE (RULE 26) that at least one of the application devices (Eq.... G3b) provided in the application zone (G) is a combined powder-Z wet paint booth (KG), each of which is a first separating device (11) for wet paint and a second

Has separating device (12) for powder coating, both separating devices (11 and 12) being held in the lower part (6) and being displaceably guided (13), and that these separating devices (11 and 12) are for alternating docking the air-permeable bottom (7) of the powder-Z wet paint booth (GK) and the exhaust device (10) are formed.

3. Installation according to one of claims 1 and 2,

characterized,

that at least one of the application devices (Eq... G3b) is designed in relation to the others for the application of a surface finishing substance that is different in terms of its nature and nature or for another finishing method.

SPARE BLADE (RULE 26)

4. Installation according to one of claims 2 to 3,

characterized,

that the separators (11 and 12) in

Cab longitudinally guided (13) and are preferably coupled to each other.

5. Plant according to one of claims 2 to 3,

characterized,

that the separators (11 and 12) are guided displaceably in the transverse direction of the cabin.

6. Installation according to one of claims 2 to 5,

characterized,

that the separating devices (11 and 12) are provided several times, preferably as a combination of three or four.

SPARE BLADES (RULE 26)

7. Plant according to one of claims 2 to 6,

characterized,

that the air-permeable bottom (7) of the powder Z

Wet paint booth (GK) has an approximately U-shaped or V-shaped channel (8) running in the longitudinal direction of the cabin and preferably in the center area, sealed with respect to the separating devices (11 and 12) and lowered with respect to the plane of the bottom (7), the conveying path (F1, F2a or F3a) running within the latter (8).

8. Plant according to one of claims 1 to 7,

thanks to a combination of the following features:

a) The application zone (G) has a first application device (G1) which is passed through a first conveying path (F1) coming from the preparation area (B) and which is connected to a dryer (Q1) by means of a downstream cross conveyor (Q1). Hl) has;

SPARE BLADE (RULE 26) b) in addition to the application device (Eq) are further application devices in pairs

(G2a, G2b and G3a, G3b), which are each successively traversed by a conveyor section (F2a or F3a),

c) the recirculated second or third conveying path (F2 or F3) which runs past the dryer (H2 or H3) laterally in the drying zone opens into the front application device (G2a or G3a) while the application device (G2b or G3b) at the rear along the conveying path (F2a or F 3a) is connected to a dryer (H2 or H3) with the interposition of a further cross conveyor (Q2 or Q3).

9. Plant according to one of claims 1 to 8,

characterized,

that the dryers are multi-lane and preferably an evaporation and drying or drying, a stoving and a

Include cooling section.

SPARE BLADE (RULE 26)

10. Plant according to one of claims 1 to 9,

characterized,

that between the, downstream of the dryers (Hl, H2, H3), cross conveyor {Q4) and the testing and completion zone (J), the latter (J) facing and connected to the (J), a buffer zone (P) and a further cross conveyor ^' (Q5) are arranged.

11. Plant according to one of the preceding claims,

characterized,

that the means provided for powder coating in a central part (5) of the powder-Z wet paint booth (GK) is assigned at least one switch-over device which allows an optional connection of different types of powder from a different powder cycle.

SPARE BLADE (RULE 26)