EP4153362A1 - Pièce principale pour une cellule de revêtement d'une installation de revêtement - Google Patents

Pièce principale pour une cellule de revêtement d'une installation de revêtement

Info

Publication number
EP4153362A1
EP4153362A1 EP21728491.8A EP21728491A EP4153362A1 EP 4153362 A1 EP4153362 A1 EP 4153362A1 EP 21728491 A EP21728491 A EP 21728491A EP 4153362 A1 EP4153362 A1 EP 4153362A1
Authority
EP
European Patent Office
Prior art keywords
coating
base body
cell
suction
trough
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP21728491.8A
Other languages
German (de)
English (en)
Other versions
EP4153362B1 (fr
Inventor
Peter Steiger
Georg Steger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gema Switzerland GmbH
Original Assignee
Gema Switzerland GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gema Switzerland GmbH filed Critical Gema Switzerland GmbH
Publication of EP4153362A1 publication Critical patent/EP4153362A1/fr
Application granted granted Critical
Publication of EP4153362B1 publication Critical patent/EP4153362B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B14/00—Arrangements for collecting, re-using or eliminating excess spraying material
    • B05B14/40—Arrangements for collecting, re-using or eliminating excess spraying material for use in spray booths
    • B05B14/48—Arrangements for collecting, re-using or eliminating excess spraying material for use in spray booths specially adapted for particulate material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
    • B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
    • B05B13/04—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the spray heads being moved during spraying operation
    • B05B13/0431—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the spray heads being moved during spraying operation with spray heads moved by robots or articulated arms, e.g. for applying liquid or other fluent material to three-dimensional [3D] surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B14/00—Arrangements for collecting, re-using or eliminating excess spraying material
    • B05B14/40—Arrangements for collecting, re-using or eliminating excess spraying material for use in spray booths
    • B05B14/41—Arrangements for collecting, re-using or eliminating excess spraying material for use in spray booths by cleaning the walls of the booth
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B16/00—Spray booths
    • B05B16/40—Construction elements specially adapted therefor, e.g. floors, walls or ceilings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B14/00—Arrangements for collecting, re-using or eliminating excess spraying material
    • B05B14/40—Arrangements for collecting, re-using or eliminating excess spraying material for use in spray booths
    • B05B14/43—Arrangements for collecting, re-using or eliminating excess spraying material for use in spray booths by filtering the air charged with excess material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B14/00—Arrangements for collecting, re-using or eliminating excess spraying material
    • B05B14/40—Arrangements for collecting, re-using or eliminating excess spraying material for use in spray booths
    • B05B14/45—Arrangements for collecting, re-using or eliminating excess spraying material for use in spray booths using cyclone separators

Definitions

  • the present invention relates generally to the surface treatment of workpieces and in particular to the coating of workpieces with coating material, in particular coating powder. According to one aspect of the present invention, this relates to a coating booth or coating cell of a coating system that is optimized for coating workpieces.
  • Coating booths or coating cells for coating workpieces, in particular with coating powder are generally known from the prior art.
  • Such coating booths or coating cells usually have a coating chamber with a booth floor, two workpiece passages opposite one another and a conveying device for transporting workpieces to be coated through the coating chamber.
  • document EP 0 071 756 A2 relates to a coating booth with a conveying device which transports the objects to be coated via an entrance and an exit through the interior of the booth.
  • a spray device in the cabin is a wall element with a hand-held spray gun that can be opened through doors.
  • automatically controlled spray guns can also be provided.
  • the doors also allow access to the cabin interior.
  • the spray devices with the spray guns can all be arranged on the same side of the booth. Spray devices in the form of prepared wall elements with slots for the passage of guns can also be provided on the opposite side.
  • the objects to be coated can also be manually introduced into the cabin interior and - after a coating process - removed again.
  • the conveyor device for automatically transporting the objects to be coated through the booth interior can also be arranged below the booth floor of the coating booth and have a workpiece carrier which protrudes through a conveyor slot in the booth floor into the coating chamber of the coating booth.
  • Coating booths with such "floor conveyors” are used in particular for the coating of high-quality workpieces, since the arrangement of the conveyor device below the booth floor enables a high level of coating quality to be achieved Through the coating chamber, dirt particles or powder residues can fall from the conveyor, which can lead to irregularities in the coating.
  • cabs or systems for the discontinuous transport of workpieces in manual coating are also known, in particular for powder coating, this type of cabin being different from flow cabins which are designed for continuous workpiece transport in manual and / or automatic coating.
  • This basic types is used depends essentially on the scope of the respective coating task, In other words, the job to be carried out by the coater, whereby a distinction can essentially be made between the following categories: large production batches in only one or a few color tones (for example, coating area 1,000 m 2 and more); Medium-sized production lots, in several shades (for example, coating area 200 to 1,000 m 2 );
  • the present invention is based on the object of specifying a booth concept which allows coating booths or coating systems to be used as flexibly and automatically as possible and still deliver optimum productivity and economy.
  • the booth concept should be suitable for taking into account the peculiarities occurring in the course of the progressive automation of the coating process, namely in particular that coating robots are increasingly being used for the automatic coating process.
  • the cabin concept should be suitable to be able to react as flexibly as possible to different requirements.
  • the present invention relates in particular to a modularly designed coating concept, which allows a coating booth or coating cell to be designed application-specifically in a particularly simple manner in order to be able to optimally take into account all the peculiarities of the individual case.
  • the invention relates to a base body for a coating cell of a coating system, the base body having a modular structure and preferably being designed as an exchangeable element within the overall system of the coating system.
  • the base body is designed, in particular, to be connectable to at least one side wall, which is preferably designed as a module, in order to be able to provide a coating cell configured in particular for a specific application.
  • the base body is designed to be connected to a further base body, preferably of the same type or type, in order to form at least one region of a coating line of a coating installation.
  • the base body particularly preferably forms the lower part and the cell floor of the coating cell and in particular has a polygonal and preferably rectangular base area.
  • the base body has at least one trough, trough or trough-shaped inner region that forms the cell bottom of the coating cell and has at least one surface that is inclined or curved in the direction of a suction opening or in the direction of a suction channel.
  • the base body also has a frame-shaped outer area, of which the at least one tub-, Trough-shaped or trough-shaped interior is at least partially added.
  • the base body has an integrated suction system for suctioning off and / or removing overspray powder, in particular, as required during the coating operation of the coating cell.
  • overspray powder means coating material which could not be applied to the workpiece to be coated or which has already been sprayed at least once during a coating process and is accordingly recycled referred to as "recovery" material.
  • the suction system has at least one suction opening formed in the frame-shaped outer area and preferably arranged centrally in a side wall of the outer area and flow-connected to a vacuum source.
  • This at least one suction opening is fluidly connected to at least one suction opening opening into the interior and / or to at least one suction duct at least partially formed in the interior via a duct system formed between the exterior and interior.
  • the base body has two trough-shaped, trough-shaped or trough-shaped inner areas which are arranged next to one another and are mirror images of one another and are accommodated in a common frame-shaped outer area.
  • the suction system has at least one suction opening formed in the rahmenför-shaped outer area and preferably arranged centrally in a side wall of the outer area and connectable to a vacuum source in terms of flow, the suction opening being flow-wise via a channel system formed between the outer area and the two inner areas is connected to a suction opening opening into a first inner area of the two inner areas and to a suction opening opening into a second inner area of the two inner areas.
  • the at least one suction opening formed in the frame-shaped outer area can be connected in terms of flow to a suction system of a further base body of a coating cell and preferably to a suction system of a further base body of the same type or type is.
  • the base body preferably has an integrated blow-off system for the particular need-based and preferably pulsed discharge of compressed air, in particular along the at least one inclined or curved surface of the booth floor and in the direction of the suction opening or the suction channel.
  • the blow-off system has at least one blow-off strip and preferably a plurality of blow-off strips, which can be individually controlled if necessary and can be supplied with compressed air, the blow-off strips aufwei sen corresponding blow-off openings, which are preferably in an edge area of the Open inside into the inside area.
  • At least partial areas of the booth floor which surround the conveyor slot are designed in the form of a ramp, with at least one air blowing device being provided for preferably pulsed blowing out of an air stream along the ramped partial area of the booth floor in the direction of at least one suction channel provided in the booth floor.
  • the at least one air blowing device is advantageously provided on the conveyor slot.
  • At least one further air-blowing device is preferably used on or in at least one side wall of the coating booth that adjoins the side walls with the workpiece passages.
  • the one further Heilblasein direction is in particular designed to blow out a stream of air, preferably in a pulsed manner, along the cabin floor in the direction of the at least one suction channel provided in the cabin floor.
  • the invention also relates to a coating cell of a coating system, the coating cell having a base body of the inventive type described above and at least one side wall preferably designed as a module with the base body and preferably also one with the at least has a side wall connected or connectable roof area.
  • the coating cell according to the invention is particularly suitable for the automated powder coating of workpieces.
  • the coating cell preferably has a base area which is adapted to the radius of action of a coating robot.
  • the coating cell preferably has two passages for supplying and removing the workpiece and a single side wall opposite the open side of the coating cell where the coating robot is provided.
  • the base body forms the basic component, which makes it possible to flexibly build coating cells for different applications.
  • the base body serving as the lower part is modular and standardized.
  • the modular structure of the base body makes it possible to design the coating cell individually and in particular to connect the at least one side wall to the base body in such a way that a coating robot has optimal access, for example from a first, second or third side or from one Corner of the main body.
  • This flexible coating cell is primarily used in connection with coating robots, but it could also be used in series with a conventional automatic system (axis and manual coating stations).
  • the base area of the base body is preferably 1 to 3 m (width and length) and typically 1.5 to 2.5 m. In the case of a double cell, the length is increased, but the width remains in the same order of magnitude.
  • FIG. 1 schematically and in an isometric view a portion of a coating installation with coating cells according to embodiments of the present invention
  • FIG. 2 schematically and in an isometric view a first exemplary embodiment of the base body according to the invention of a coating cell
  • FIG. 3 schematically and in an isometric view, a second exemplary embodiment of the base body according to the invention of a coating cell
  • FIG. 4 shows, schematically and in an isometric view, a third exemplary embodiment of the base body according to the invention of a coating cell
  • FIG. 5 schematically and in an isometric view a fourth exemplary embodiment of the base body according to the invention of a coating cell.
  • FIG. 1 schematically shows an exemplary embodiment of a powder coating system 1 according to the solution according to the invention.
  • the powder coating processing system 1 is used for the spray coating of objects with coating powder, which is then in a in FIG. 1 heating furnace, not shown, is melted onto the objects.
  • one or more electronic control devices are provided to control the function of the powder coating system 1.
  • Powder pumps are provided for the pneumatic conveyance of the coating powder. These can be injectors in which compressed air serving as conveying air is sucked in from a powder container, after which the mixture of conveying air and coating powder flows together into a container or to a spray device. Suitable injectors are known, for example, from the document EP 0 412 289 B1.
  • Pump types can also be used as powder pumps which convey small powder portions one after the other by means of compressed air, a small powder portion (amount of powder) being stored in a powder chamber and then pressed out of the powder chamber by means of compressed air. The compressed air stays behind the powder portion and pushes the powder portion in front of it.
  • This pump Pen types are sometimes referred to as “compressed air thrust pumps” or “plug conveying pumps”, as the compressed air pushes the stored powder portion like a plug in front of it through a pump outlet line.
  • Various types of such powder pumps for conveying dense coating powder are known, for example, from the following publications: DE 103 53 968 A1,
  • the invention is not limited to one of the types of powder pumps mentioned.
  • an applicator system 3 is also used for each coating cell 2 for spraying coating material as required in the corresponding coating cell 2.
  • the applicator system 3 has at least one corresponding gun system 4 for spraying coating material as required.
  • the at least one gun system 4 is assigned a robot system for positioning and / or aligning the gun system relative to the workpieces to be coated during a coating process.
  • the robot system together with the at least one gun system 4 form a coating robot 3, which - in contrast to conventional axis or positioning systems - is not designed as a system that moves along with the workpieces to be coated when the workpieces to be coated are transported through the coating cell 2 .
  • Each coating robot 3 can be moved in three dimensions relative to the base body 5 of the coating cell 2 and relative to a workpiece.
  • the at least one gun system 4 is assigned a robot arm system which can be moved in all directions with the help of a robot guide below or above a conveyor device for the workpieces to be coated.
  • the gun system 4 preferably has at least one coating gun.
  • the coating gun is preferably an electrostatic coating gun which is designed to electrostatically charge the coating material to be sprayed with the coating gun.
  • the coating gun (s) is assigned a control device for controlling and / or regulating the current strengths for charging the coating material.
  • the control device should in particular be designed to regulate current values below 10 pA in at least 0.5 pA steps.
  • At least partial areas of the cabin floor are designed in the shape of a ramp, with at least one air blowing device being provided for preferably pulsed blowing out of an air stream along the ramped partial area of the cabin floor in the direction of at least one suction channel provided in the booth floor 6.
  • At least one further air blowing device is preferably used on or in at least one side wall of the coating cell 2, which is adjacent to the side walls with the workpiece passages.
  • the one further Heilblasein direction is in particular designed to blow out a stream of air, preferably in a pulsed manner, along the cabin floor in the direction of the at least one suction channel 6 provided in the cabin floor.
  • the coating system 1 has one shown in FIG. 1 coating material supply, not shown, for supplying coating material to the gun systems 4 of the coating robot 3.
  • the coating material supply is designed in particular to supply the corresponding gun systems 4 with only fresh coating material or fresh coating material with recovery material or only recovery material as required.
  • the coating material supply preferably has at least one coating material pump for each gun system 4, the coating material pump preferably being based on the dense flow principle and being designed for continuous coating material delivery.
  • Coating powder which does not adhere to the object to be coated is sucked as overspray powder (excess powder) via an excess powder line 7 by means of a suction air flow from a fan 8 into a cyclone separator 9.
  • the excess powder is separated as far as possible from the suction air flow in the cyclone separator 9.
  • the separated powder portion is then transported as recovery powder or recovery powder from the cyclone separator 9 via a powder recovery line to an optionally provided screening device, where it passes through the screening device, either alone or mixed with fresh powder via powder supply lines, back to the spray guns 4 of the robot systems.
  • the exhaust air from the cyclone separator 9 passes via an exhaust air line 10 into a post-filter device 11 and therein through one or more filter elements to the fan 8 and after this into the outside atmosphere.
  • the filter elements can be filter bags or filter cartridges or filter plates or similar filter elements.
  • the powder separated from the air flow by means of the filter elements is normally waste powder and falls by gravity into a waste container or can be conveyed via one or more waste lines into a waste container at a waste station.
  • FIG. 1 shows in particular a partial area of a coating system 1 which has two coating cells 2, each of which is equipped with an exemplary embodiment of the base body 5 according to the invention.
  • the in FIG. 1 coating system shown schematically and in an isometric view, comprises in detail a first coating cell 2 and a second coating cell 2 arranged immediately adjacent thereto is.
  • the in FIG. 1 schematically dargestell th coating system 1 used coating cells 2 in particular special with regard to a powder coating with the help of a coating robot 3 designed.
  • each coating cell 2 has only one (single) side wall 12 with a roof area 13, which preferably only partially covers the top of the coating cell 2 in order to be able to optimally utilize the maneuverability of the coating robot 3.
  • the side of the coating cell 2 opposite the single side wall 12 is designed as an "open" side wall so that the coating robot 3 can completely coat a workpiece not shown in FIG.
  • the respective base bodies 5 of the coating cells 2 used in the coating system 1 each have a modular structure and are, in particular, preferably designed to be identical to one another. Each base body 5 can be designed as an exchangeable element within the overall system of the coating installation 1.
  • the respective side walls 12, which are connected to the base bodies 5, are preferably also designed in the same way and can be individually connected as a module to the base bodies 5 of the coating cells 2.
  • the two base bodies 5 of the coating cells 2 are connected to one another and each form the lower part and the cell bottom of the corresponding coating cell 2.
  • a polygonal and, in particular, rectangular base area of the cell bottom is particularly preferred here.
  • the base body 5 of the coating cells 2 is each assigned an integrated suction system in order to extract and remove any overspray powder that may occur during the coating operation of the coating cell 2.
  • FIG. 2 to FIG. 5 shows different configurations of the basic body 5 according to the invention, each in an isometric and schematic view.
  • Each embodiment of the base body 5 has a modular structure construction and is designed to be connectable to at least one side wall 12, which is preferably also designed as a module, in order to provide a coating cell 2 configured in particular for a specific application.
  • the base bodies 5 form the lower part and the cell floor of the coating cell 2 and each have a polygonal and, in particular, rectangular base area.
  • Each base body 5 has at least one trough, trough or trough-shaped inner region 14, which forms the cell bottom of the coating cell 2, with at least one surface 16 inclined or curved in the direction of a suction opening 15, 19 or in the direction of a suction channel 6.
  • the base body 5 has a frame-shaped outer area 17, of which the at least one trough, trough or trough-shaped inner area 14 is at least partially received.
  • each base body 5 has an integrated suction system in order, in particular, to suck off or remove overspray powder in the powder coating operation of the coating cell 2, if necessary.
  • the suction system has at least one suction opening 19 formed in the frame-shaped outer area 17 and preferably arranged centrally in a side wall 18 of the outer area 17 and connectable to a vacuum source in terms of flow.
  • This at least one suction opening 19 is fluidly connected to at least one suction opening 19 opening into the inner area 14 and / or to at least one suction channel 6 at least partially formed in the inner area 14 via a channel system formed between the outer area 17 and the inner area 14.
  • the base body 5 is two (or more) arranged side by side and in particular, trough-shaped, trough-shaped or mul-shaped inner areas 14 which are designed as mirror images of one another and which are received in a common rahmenför-shaped outer area 17.
  • the suction system has at least one suction opening 19 formed in the frame-shaped outer area 17 and preferably arranged centrally in a side wall of the outer area 17 and flow-wise connectable to a vacuum source, this suction opening 19 via a between the Outer area 17 and the two inner areas formed channel system fluidly connected with a suction opening 19 opening into a first inner area 14 of the two inner areas 14 and with a suction opening 19 opening into a second inner area 14 of the two inner areas 14.
  • the at least one suction opening 19 formed in the frame-shaped outer area 17 can be connected in terms of flow to a suction system of a further base body 5, preferably of the same type or of the same type.
  • a series connection of the base bodies 5 is possible.
  • the exemplary embodiments of the base body 5 according to the invention preferably also have an integrated blow-off system in order to be able to discharge compressed air as required and preferably in a pulsed manner, in particular along the at least one inclined or curved surface 16 and in the direction of the suction opening 19 or the suction channel of the base body 5.
  • the blow-off system makes sense for the blow-off system to have at least one blow-off strip and preferably a plurality of blow-off strips, where the at least one blow-off strip has at least one outlet opening which opens into the inner region 14 in an edge region of the inner region.
  • FIG. 2 indicates how the blowing out, preferably the pulsed blowing out, of compressed air can take place in the cleaning mode.
  • the invention is not limited to the embodiments shown in the drawings, but results from an overview of all of the features disclosed herein.

Landscapes

  • Engineering & Computer Science (AREA)
  • Robotics (AREA)
  • Electrostatic Spraying Apparatus (AREA)
  • Spray Control Apparatus (AREA)

Abstract

L'invention se rapporte à une pièce principale (5) pour une cellule de revêtement (2) d'une installation de revêtement (1), la pièce principale (5) ayant une conception modulaire et étant de préférence un élément échangeable à l'intérieur de l'ensemble du système de l'installation de revêtement (1). La pièce principale (5) est en outre conçue pour être reliée à au moins une paroi latérale (12) qui se présente, de préférence, sous la forme d'un module, afin de fournir une cellule de revêtement (2) conçue plus particulièrement par un utilisateur.
EP21728491.8A 2020-05-20 2021-05-19 Corps de base d'une cellule de revêtement d'un système de revêtement Active EP4153362B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102020113645.5A DE102020113645A1 (de) 2020-05-20 2020-05-20 Grundkörper für eine beschichtungszelle einer beschichtungsanlage, beschichtungszelle mit einem solchen grundkörper und beschichtungsanlage mit mindestens einer beschichtungszelle
PCT/EP2021/063263 WO2021233984A1 (fr) 2020-05-20 2021-05-19 Pièce principale pour une cellule de revêtement d'une installation de revêtement

Publications (2)

Publication Number Publication Date
EP4153362A1 true EP4153362A1 (fr) 2023-03-29
EP4153362B1 EP4153362B1 (fr) 2025-07-23

Family

ID=76181096

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21728491.8A Active EP4153362B1 (fr) 2020-05-20 2021-05-19 Corps de base d'une cellule de revêtement d'un système de revêtement

Country Status (5)

Country Link
US (1) US20230347370A1 (fr)
EP (1) EP4153362B1 (fr)
CN (1) CN115666795A (fr)
DE (1) DE102020113645A1 (fr)
WO (1) WO2021233984A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022108374A1 (de) 2022-03-21 2023-09-21 Gema Switzerland Gmbh Beschichtungskabine zum beschichten von werkstücken mit beschichtungsmaterial
EP4249130B1 (fr) * 2022-03-21 2026-02-25 Gema Switzerland GmbH Cabine de revêtement pour revêtir des pièces avec un matériau de revêtement

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US20230347370A1 (en) 2023-11-02
EP4153362B1 (fr) 2025-07-23
WO2021233984A1 (fr) 2021-11-25
CN115666795A (zh) 2023-01-31

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