EP2821147B1 - Installation de revêtement et procédé de revêtement - Google Patents

Installation de revêtement et procédé de revêtement Download PDF

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Publication number
EP2821147B1
EP2821147B1 EP13174459.1A EP13174459A EP2821147B1 EP 2821147 B1 EP2821147 B1 EP 2821147B1 EP 13174459 A EP13174459 A EP 13174459A EP 2821147 B1 EP2821147 B1 EP 2821147B1
Authority
EP
European Patent Office
Prior art keywords
station
workpiece
receiving mandrel
working position
mandrel
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.)
Not-in-force
Application number
EP13174459.1A
Other languages
German (de)
English (en)
Other versions
EP2821147A1 (fr
Inventor
Josef Wallner
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.)
Sturm Maschinen und Anlagenbau GmbH
Original Assignee
Sturm Maschinen und Anlagenbau 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 Sturm Maschinen und Anlagenbau GmbH filed Critical Sturm Maschinen und Anlagenbau GmbH
Priority to EP13174459.1A priority Critical patent/EP2821147B1/fr
Publication of EP2821147A1 publication Critical patent/EP2821147A1/fr
Application granted granted Critical
Publication of EP2821147B1 publication Critical patent/EP2821147B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • B05B16/90—Spray booths comprising conveying means for moving objects or other work to be sprayed in and out of the booth, e.g. through 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
    • B05B16/20—Arrangements for spraying in combination with other operations, e.g. drying; Arrangements enabling a combination of spraying operations
    • 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
    • B05B13/0221—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work characterised by the means for moving or conveying the objects or other work, e.g. conveyor belts
    • B05B13/0228—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work characterised by the means for moving or conveying the objects or other work, e.g. conveyor belts the movement of the objects being rotative

Definitions

  • the invention relates to a coating installation for coating workpieces with at least one receiving mandrel for receiving at least one workpiece, a conveying device with which the receiving mandrel can be conveyed to processing stations, a painting station in which the at least one workpiece can be coated on the receiving mandrel with a lacquer, and a Hardening station, in which the at least one workpiece on the mandrel is irradiated in a protective gas atmosphere by means of an irradiation device, wherein the lacquer cures, according to the preamble of claim 1.
  • the invention further relates to a method for coating workpieces, in which at least one workpiece is arranged on a mandrel, the mandrel is conveyed with the at least one workpiece by means of a conveyor to processing stations, in a painting the at least one workpiece on the mandrel with a paint is coated and irradiated in a curing station the at least one workpiece on the mandrel in a protective gas atmosphere by means of an irradiation device, wherein the lacquer cures, according to the preamble of claim 11.
  • a generic coating system and a corresponding coating process for example, from the WO 2007/045442 A1 out.
  • the coating system described herein in which the workpieces pass through a larger protective gas range, makes sense for mass production of relatively large workpieces.
  • the protective gas chamber should be as small as possible in order to minimize the consumption of inert gas.
  • the invention has for its object to provide a coating system and a coating method, which allow even for smaller parts a particularly economical coating.
  • the coating system according to the invention is characterized in that the receiving mandrel is pivotable between a horizontal first working position and a vertical second working position, that the receiving mandrel is pivoted with the at least one workpiece in the painting station in the horizontal working position and that the mandrel with the at least one workpiece in the curing station is pivoted to the vertical second working position.
  • a basic idea of the invention is to carry out the painting of workpieces in a horizontal mandrel, while the curing of the coated workpiece is carried out in a protective gas chamber in a second vertical working position.
  • This allows on the one hand effective painting in a horizontal orientation and a protective gas-saving curing in a vertically oriented protective gas chamber.
  • the receiving mandrel may be formed lance or rod-shaped, so that it can also accommodate elongated and thus relatively bulky workpieces.
  • the mandrel may be connected to the conveyor fixed or detachable via a holding unit.
  • a preferred embodiment of the invention is that the curing station has a protective gas chamber, which comprises a protective gas bell with a lower access opening.
  • This arrangement is particularly useful for receiving inert gas, which is lighter than the ambient air.
  • the supply of the workpiece takes place via a relative vertical lifting movement between the protective gas bell and the workpiece.
  • the mandrel can be retracted with the at least one workpiece in the protective gas bell.
  • the protective gas bell it is particularly advantageous for the protective gas bell to be vertically movable between a lower hardening position in which the locating mandrel is enclosed in the vertical working position and an upper feed position in which the locating mandrel can be positioned under the protective gas bell in the vertical working position .
  • the lance-shaped mandrel can take a vertical position in the curing station, in which a small footprint is needed.
  • the sleeve-shaped protective gas bell which has side walls and a closed ceiling area, is then moved vertically from above over the workpiece, so that the protective gas atmosphere arranged in the protective gas bell encloses the workpiece.
  • movement from above harmful residual oxygen can be displaced down through the lower access opening of the protective gas bell.
  • the lifting movement of the protective gas bell can be effected by a lifting drive, in particular a setting cylinder.
  • the irradiation device is mounted in or on the protective gas bell and can be moved with it.
  • the irradiation devices are arranged on the side walls and / or the ceiling area, so that a sufficient irradiation of the coated workpiece areas is ensured.
  • the irradiation device can be any irradiation device, in particular also a heating device. However, it is particularly preferred according to the invention that the irradiation device comprises at least one UV emitter. This irradiation device is intended for UV-curable coatings. These ultraviolet light-curable coatings have long been known and are widely used for efficient coating and painting of workpieces.
  • a particularly good painting and compensation of the influence of gravity on the coating thickness is achieved according to a preferred embodiment of the invention in that the receiving mandrel for rotating the at least one workpiece is rotatably mounted and driven.
  • the lance-shaped receiving mandrel with the at least one workpiece in the horizontal first working position can be achieved that avoided during painting a flow of the applied paint in the direction of gravity or largely prevented.
  • lacquer layers having a particularly uniform lacquer layer thickness can be achieved, in particular during painting.
  • Even in the curing station in the vertical second working position a rotation of the receiving mandrel may be useful so as to ensure a uniform irradiation of all workpiece areas.
  • the mandrel is designed as a rotatably mounted spindle. On each mandrel or each holding unit may be provided a rotary motor.
  • any suitable transport device in particular revolving conveyors, can be provided as conveying device.
  • the conveying device has a rotary indexing table on which a plurality of receiving mandrels are pivotably mounted.
  • the receiving mandrels or the holding units for the receiving mandrels are arranged distributed uniformly along the circumference of the rotary indexing table.
  • a corresponding pivot drive is provided, with which the receiving mandrels between the horizontal first working position and the vertical second working position are pivotable.
  • the rotary actuator can have an electric motor or a pneumatic or hydraulic actuating cylinder.
  • a pivoting means of a sliding mechanism in the cyclic further rotation of the rotary indexing table is possible.
  • the processing stations are distributed uniformly along the circumference of the rotary indexing table, so that the workpieces can be further promoted by a processing station at each clocking step.
  • further processing stations are arranged along a conveying path of the conveying device, in particular a feeding station, a cleaning station, a flame station, an ionizing station and / or a removal station.
  • the abandonment of the workpieces or the removal of the finished painted and hardened workpieces can be done manually or via an automatic gripper.
  • the cleaning station degreasing by means of liquid or by blowing off dust particles can take place.
  • the Beflammstation can do another cleaning in a thermal way be carried out under the influence of one or more gas burners.
  • an electrical charging can be reduced or avoided by an appropriate loading of the workpiece, so that in particular dust deposits are avoided immediately before painting in the painting station.
  • a preferred development of the invention consists in that an air lock is arranged at least between two adjoining processing stations. Between the individual stations partition walls are provided with a through hole in principle. The passage opening is aligned horizontally or vertically according to the respective working position of the mandrel during the passage.
  • corresponding access doors and / or preferably air lock chambers can be provided.
  • the airlock chamber can be used to ensure with high certainty that either no dust-laden air penetrates into the coating station or no air loaded with paint particles escapes to the outside.
  • the air locks can be designed such that they have a certain negative pressure or overpressure compared to the pressure in the painting station. This relative pressure difference can be effected either by a pressure setting in the painting station or in the airlock.
  • airlocks can also be provided between other processing stations, as far as necessary.
  • the protective gas in the curing station can be selected according to the applied coating or the paint.
  • noble gases or CO 2 are possible as inert gas, which can be influenced by heating in their density so that they are lighter for use in a protective gas bell than the surrounding air atmosphere.
  • nitrogen is provided as a protective gas.
  • This is basically lighter than the surrounding air atmosphere.
  • nitrogen is a major constituent of the surrounding air atmosphere and does not present an impurity when it exits.
  • nitrogen volatilizes upwards to the hall ceiling and, unlike carbon dioxide, can not form dangerous concentrations near the bottom.
  • the feed device is preferably arranged in the region of the irradiation device such that the inflowing protective gas cools the irradiation device and at the same time the protective gas is heated even before it enters the protective gas bell. This targeted heating of the protective gas additionally reduces outlet losses through the lower access opening when using a protective gas bell.
  • the mandrel is pivoted between a horizontal first working position and a vertical second working position that is pivoted for painting in the painting of the mandrel with the at least one workpiece in the horizontal first working position and in that, for hardening in the hardening station, the receiving mandrel with the at least one workpiece is pivoted into the vertical second working position.
  • the method is intended in particular for implementation with the above-described coating system. With the coating method, the aforementioned advantages can be achieved.
  • a coating system 10 has according to Fig. 1 a housing 14 encapsulating the plant.
  • a loading station 30 and a removal station 70 designed for the workpieces 5 as manual workstations.
  • Functional components such as an operating unit 18 and a control cabinet 16, are arranged on the outside of the housing 14, so that they are easy to operate and maintain.
  • the further structure of the coating system 10 is in connection with the FIGS. 2 and 3 explained.
  • a painting station 40 and a curing station 50 are provided within the housing 14.
  • About a rotary indexing table 22 as a conveyor 20 to be coated workpieces 5 are promoted from the feeding station 30 to the individual processing stations gradually with a rotational movement.
  • a total of four workpieces 5 are mounted on a lance or spit-like receiving mandrel 12.
  • the mandrels 12 with the workpieces 5 are brought about by means of transport vehicles to the loading station 30, where they are manually attached to holding units 26 on the rotary table 22 in the illustrated embodiment manually.
  • the holding units 26, which are distributed uniformly along the outer circumference of the rotary indexing table 22, may have a clamping device for fixing the plugged-on receiving mandrel 12.
  • the receiving mandrels 12 are attached to the workpieces 5 in a vertical first working position.
  • the receiving mandrel 12 is then conveyed further into a cleaning station 32.
  • the cleaning station 32 the workpieces 5 are cleaned of dirt, in particular degreased.
  • the receiving mandrel 12 can then be moved further with the cleaned workpieces 5 to a flaming station 34. It can be done here by an additional activation of the surface by flaming by means of a gas burner. This is followed by further conveying to an ionizing station 36 in order to avoid electrical discharges and thus static adhesion of dust.
  • the receiving mandrel 12 is further conveyed with the workpieces 5 via a chamber-like airlock 38 in the painting 40.
  • the Beflammstation 34 and the ionizing station 36 is the Take-up mandrel 12 with the workpieces 5 in the horizontal second working position, in which the mandrel 12 has been pivoted after a vertical retraction into the cleaning station 32 by a corresponding pivot drive on the holding unit 26.
  • the individual stations are separated by partitions 19 from each other.
  • through holes 28 are provided for the passage of the receiving mandrels 12 with the workpieces 5. According to the horizontal alignment of the receiving mandrels 12, these through-holes 28 are formed as substantially horizontal slots.
  • the workpieces 5 are coated on the receiving mandrels 12 in a total of two steps with a UV-curable lacquer.
  • a painting robot 42 is fixedly arranged in a receiving area 17 above the rotary indexing table 22.
  • a suction and filter unit 44 in the painting station 40 spray mist can be sucked off and filtered off during spraying of the paint.
  • the horizontally arranged receiving mandrels 12 with the workpieces 5 are rotated during painting about its longitudinal axis by means of a rotary motor.
  • the receiving mandrels 12 with the workpieces 5 are conveyed further into a second airlock 48 which, like the first airlock 38, prevents unwanted escape of paint particles loaded with paint particles from the coating station 40.
  • a second airlock 48 which, like the first airlock 38, prevents unwanted escape of paint particles loaded with paint particles from the coating station 40.
  • the chamber-like coating station 40 relative to the two adjacent air locks 38, 48 a certain negative pressure.
  • a sleeve-shaped protective gas bell 52 is arranged with a hexagonal cross-section.
  • the protective gas bell 52 has a closed ceiling area and a lower open access opening 53.
  • an elongated irradiation device 54 is arranged with a UV radiator.
  • the protective gas bell 52 For receiving the vertical mandrels 12 with the workpieces 5, the protective gas bell 52 is moved to an upper feed position, in which the vertical mandrel 12 can be placed under the protective gas bell 52. Subsequently the inert gas bell 52 is moved via a lateral lifting device 56 with a positioning cylinder vertically downwards into a hardening position. In this hardening position of the vertically pivoted mandrel 12 is arranged with the workpieces 5 approximately parallel to the elongate irradiation device 54.
  • a rotary motor not shown on the holding unit 26 of the mandrel 12 is rotated with the workpieces 5 similar to a spindle, so that a total of a total irradiation of the workpieces 5 with the UV light of the irradiation device 54 is achieved. Also in the other processing stations and in particular in the coating station 40, the receiving mandrels 12 can be rotated with the workpieces 5 via the rotary motor on the holding unit 26 in order to achieve full processing, in particular painting.
  • the interior of the protective gas bell 52 is filled with a protective gas, in particular nitrogen.
  • a protective gas in particular nitrogen.
  • the enclosed protective gas atmosphere displaces the ambient air around the workpieces 5 downwards.
  • Via a supply, not shown, in the ceiling area can regularly new inert gas are introduced into the protective gas bell 52 to compensate for the unavoidable in operation protective gas losses through the lower inlet opening 53.
  • the protective gas bell 52 is again moved upwards, so that then the receiving mandrel 12 is conveyed with the workpieces 5 in the vertical position by a vertical passage slot in the housing 14 to the external removal station 70. From there, the receiving mandrel 12 can be solved with the workpieces 5 of the holding unit 26 and passed manually to a discharge device.

Landscapes

  • Coating Apparatus (AREA)

Claims (11)

  1. Installation de revêtement pour le revêtement de pièces d'usinage (5), avec :
    - au moins un mandrin porte-pièce (12) destiné à recevoir au moins une pièce d'usinage (5),
    - un dispositif de transport (20), avec lequel le au moins un mandrin porte-pièce (12) peut être transporté vers des postes de traitement,
    - un poste de peinture (40), dans lequel la au moins une pièce d'usinage (5), sur le mandrin porte-pièce (12), est revêtue d'une peinture, et
    - un poste de durcissement (50), dans lequel la au moins une pièce d'usinage (5), sur le mandrin porte-pièce (12), peut être irradiée au moyen d'un dispositif d'irradiation (54) dans une atmosphère de gaz de protection, faisant durcir la peinture,
    caractérisée :
    - en ce que le mandrin porte-pièce (12) peut pivoter entre une première position de travail horizontale et une deuxième position de travail verticale,
    - en ce que, dans le poste de peinture (40), le mandrin porte-pièce (12) avec la au moins une pièce d'usinage (5) est pivoté dans la première position de travail horizontale, et
    - en ce que, dans le poste de durcissement (50), le mandrin porte-pièce (12) avec la au moins une pièce d'usinage (5) est pivoté dans la deuxième position de travail verticale.
  2. Installation de revêtement selon la revendication 1,
    caractérisée :
    - en ce que le poste de durcissement (50) comprend une chambre de gaz de protection, qui comporte une enceinte de gaz de protection (52) avec une ouverture d'admission inférieure (53).
  3. Installation de revêtement selon la revendication 2,
    caractérisée :
    - en ce que l'enceinte de gaz de protection (52) peut être déplacée verticalement entre une position inférieure de durcissement, dans laquelle le mandrin porte-pièce (12) est entouré dans la deuxième position de travail verticale, et une position supérieure de chargement, dans laquelle le mandrin porte-pièce (12) peut être mis en place sous l'enceinte de gaz de protection (52) dans la deuxième position de travail verticale.
  4. Installation de revêtement selon la revendication 1 ou 3,
    caractérisée :
    - en ce que le dispositif d'irradiation (54) est monté dans ou sur l'enceinte de gaz de protection (52) et peut être déplacé avec celle-ci.
  5. Installation de revêtement selon une des revendications 1 à 4,
    caractérisée :
    - en ce que le dispositif d'irradiation (54) comporte au moins un dispositif d'irradiation UV.
  6. Installation de revêtement selon une des revendications 1 à 5,
    caractérisée :
    - en ce que le mandrin porte-pièce (12) est mis en place et entraîné en pouvant tourner, pour la rotation de la au moins une pièce d'usinage (5).
  7. Installation de revêtement selon une des revendications 1 à 6,
    caractérisée :
    - en ce que le dispositif de transport (20) comprend une table rotative (22), sur laquelle plusieurs mandrins porte-pièces (12) sont mis en place en pouvant pivoter.
  8. Installation de revêtement selon une des revendications 1 à 7,
    caractérisée :
    - en ce que plusieurs postes de traitement sont disposés le long d'un trajet de convoyage du dispositif de transport (20), plus particulièrement un poste de chargement (30), un poste de nettoyage (32), un poste de chauffage à la flamme (34), un poste d'ionisation (36) et/ou un poste de déchargement (70).
  9. Installation de revêtement selon une des revendications 1 à 8,
    caractérisée :
    - en ce qu'au moins entre deux postes de traitement adjacents, un sas à air (38, 48) est disposé.
  10. Installation de revêtement selon une des revendications 1 à 9,
    caractérisée :
    - en ce que de l'azote est prévu comme gaz de protection.
  11. Procédé pour le revêtement de pièces d'usinage (5), selon lequel :
    - au moins une pièce d'usinage (5) est disposée sur un mandrin porte-pièce (12),
    - le mandrin porte-pièce (12), avec la au moins une pièce d'usinage (5), est transporté au moyen d'un dispositif de transport (20) vers des postes de traitement,
    - dans un poste de peinture (40), la au moins une pièce d'usinage (5), sur le mandrin porte-pièce (12), est revêtue d'une peinture, et
    - dans un poste de durcissement (50), la au moins une pièce d'usinage (5), sur le mandrin porte-pièce (12) est irradiée au moyen d'un dispositif d'irradiation (54) dans une atmosphère de gaz de protection, de sorte que la peinture durcit,
    caractérisé :
    - en ce que le mandrin porte-pièce (12) est pivoté entre une première position de travail horizontale et une deuxième position de travail verticale,
    - en ce que, pour la peinture effectuée dans le poste de peinture (40), le mandrin porte-pièce (12), avec la au moins une pièce d'usinage (5), est pivoté dans la première position de travail horizontale, et
    - en ce que, pour le durcissement effectué dans le poste de durcissement (50), le mandrin porte-pièce (12), avec la au moins une pièce d'usinage (5), est pivoté dans la deuxième position de travail verticale.
EP13174459.1A 2013-07-01 2013-07-01 Installation de revêtement et procédé de revêtement Not-in-force EP2821147B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP13174459.1A EP2821147B1 (fr) 2013-07-01 2013-07-01 Installation de revêtement et procédé de revêtement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13174459.1A EP2821147B1 (fr) 2013-07-01 2013-07-01 Installation de revêtement et procédé de revêtement

Publications (2)

Publication Number Publication Date
EP2821147A1 EP2821147A1 (fr) 2015-01-07
EP2821147B1 true EP2821147B1 (fr) 2015-12-02

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EP13174459.1A Not-in-force EP2821147B1 (fr) 2013-07-01 2013-07-01 Installation de revêtement et procédé de revêtement

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112044655B (zh) * 2020-09-10 2022-10-18 浙江精恒铜业股份有限公司 一种具有干燥功能的燃气阀门加工用喷漆装置
CN112495661A (zh) * 2020-11-12 2021-03-16 苏州立科工业设计有限公司 一种海洋发电设备零件喷漆设备

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5061528A (en) * 1989-08-03 1991-10-29 A. O. Smith Corporation External manufacturing method and facility for coating vehicle structural components
JP4476407B2 (ja) * 2000-01-19 2010-06-09 本田技研工業株式会社 塗装用搬送装置
JP2004347239A (ja) * 2003-05-22 2004-12-09 Trinity Ind Corp 車両ボディの乾燥方法及び車両ボディ用乾燥炉
DE102005050371B4 (de) 2005-10-20 2012-08-16 Sturm Maschinenbau Gmbh Anlage und Verfahren zum Strahlungshärten einer Beschichtung eines Werkstückes unter Schutzgas

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