Classifications

• • C—CHEMISTRY; METALLURGY
  • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
  • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
  • C25D17/00—Constructional parts, or assemblies thereof, of cells for electrolytic coating
  • C25D17/02—Tanks; Installations therefor
• • C—CHEMISTRY; METALLURGY
  • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
  • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
  • C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
  • C25D11/005—Apparatus specially adapted for electrolytic conversion coating
• • C—CHEMISTRY; METALLURGY
  • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
  • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
  • C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
  • C25D11/02—Anodisation
• • C—CHEMISTRY; METALLURGY
  • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
  • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
  • C25D21/00—Processes for servicing or operating cells for electrolytic coating
  • C25D21/10—Agitating of electrolytes; Moving of racks
• • C—CHEMISTRY; METALLURGY
  • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
  • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
  • C25D7/00—Electroplating characterised by the article coated
  • C25D7/04—Tubes; Rings; Hollow bodies

Definitions

• the present invention relates to a method and a tank for surface treatment of metal parts, and more particularly to a conversion treatment such as, for example, an anodizing of an aluminum part. It also relates to a method and a continuous surface treatment plant using such a tank.
• the latter are, for example, degreased and rinsed by dipping in different successive baths.
• the pieces are, for example, soaked in a degreasing bath, then are removed and then soaked in a rinsing bath.
• This correction essentially consists in adapting the treatment according to each load.
• they are manufactured with a rather large volume, which leads to have large tanks and thus leads to produce a large volume of polluting effluents.
• the use of pedals and the consequent dimensions of the process implementation facilities generate maintenance costs also substantial.
• the object of the invention is then to overcome all or part of the disadvantages of existing methods and installation facilities, as mentioned above.
• the present invention relates to a process - surface treatment of hollow parts of the conversion treatment type, such as anodization, a method according to which the hollow parts are immersed completely inside at least one treatment tank containing a liquid characterized in that each hollow part is immersed by making it do at least one rotational movement such that the air bubbles that can be created at the inside of the tank are driven from the inner wall of said hollow part.
• Figure la is a front view illustrating a vessel for implementing the surface treatment method of the invention.
• Figures Ib and Ic are views respectively from above and from the side of the tank according to Figure la;
• Figure Id is a side view of a support (2) of parts preferred according to the invention.
• Figure 2a is a front view illustrating a continuous installation for implementing the continuous surface treatment method of the invention and using a vessel according to Figures 1a-Ic;
• Figures 2b and 2c are respectively top and side views of the installation according to Figure 2a.
• each hollow part is immersed by making it do at least one rotational movement such that the air bubbles that can be created inside the tank are driven from the inner wall of said hollow part.
• a rotational movement of at least 90 ° is made to each hollow part, and preferably 360 °.
• a predetermined number of said hollow parts is placed beforehand on a support comprising at least one holding member adapted to immobilize each of them.
• FIG. 1 illustrates a first embodiment given by way of example of a tank (1) intended to implement the treatment method according to the invention.
• the hollow-body treatment tank bearing the general reference (1) comprises a drum (10) rotatably mounted inside the tank, on which each hollow part is able to be fixed.
• the drum (10) comprises, at its outer periphery (100), at least one housing track (11) on which each hollow part is adapted to be fixed.
• the drum (10) comprises fastening means (12), integral with the housing track (11), adapted to fix each support (2) of hollow part (s) by sliding with the support interlocking. (2) in the track (11).
• the support (2) is, in the illustrated embodiment, as described in the patent application EP-A-1 433 537.
• the tank (1) according to the invention comprises its own motor means
• the tank (1) here an electric type drive motor, which rotates the drum (10).
• the tank (1) also comprises in the embodiment illustrated, its own transmission means (14,15), which transmit the rotational movement of the motor (13) in a rotational movement of the drum (10).
• the drum (10) is notched (15) and meshes with a pinion (14) integral with the shaft (130) motor (13).
• the tank (1) comprises pushing means (4,40) for pushing each support (2) from the outside of the tank to the immersion zone and extraction means (4,41) for extracting each support (2) having been rotated from the exit zone to the outside, the thrust and extraction means being integral with the tank to form an autonomous module.
• FIGS. 2a and 2b illustrate an embodiment of a continuous installation intended to implement a process for treating surfaces of hollow parts continuously.
• At least one treatment vessel (1) containing a liquid as described with reference to FIGS. 1a-1c is used, and the following steps are carried out:
• an immersion of each support (2) of parts in the tank (1) by making it follow a helical path between the immersion zone (ZI) and the exit zone (ZS) of the tank (l).
• a predetermined number of said hollow parts is placed on a support (2) comprising at least one holding member (21) able to immobilize each of them and in that said support (2) is introduced into the tank (1) so that it comes to push at least one other support (2a) immersed beforehand inside the tank (1), on which is placed another number determined said hollow parts and also comprising at least one holding member (21a) adapted to immobilize each of the parts of the other determined number, to achieve the output of at least one other support (2,2a, 2b ... ) on the second conveying chain (31).
• all the supports (2,2a, 2b ...) are identical and therefore each comprise the same number of holding members (21,21a, 21b ).
• the number of pieces per support (2) may vary according to the unit dimensions of the part (s) to be treated, only the dimensions of each support remains invariable in the described installation.
• At least one rinsing step is carried out by spraying water on at least one of the two conveyor chains (30, 31).
• at least one complementary successive vessel (V, Y '...) containing a complementary treatment liquid also having an immersion zone (Z1) and at the same height as the second conveyor chain (31) and in that the supply of each support (2) of the parts exiting the vessel by horizontal thrust from the second conveyor chain (31) to the immersion zone ( Zl) of the additional tank (l ', l ").
• the outlet of each support (2) of the processed parts is preferably produced in the complementary tank (1 ', 1 "(7) by horizontal extraction from an outlet zone (ZS) of the complementary tank ( the, l "(7) to the first conveyor chain (30) conveying in the same direction (SC) for the supply of each support (2) parts to the previous tank (1).
• the continuous surface treatment method of the invention comprises immersing the hollow parts in five different active liquids (LS Satin Liquid, LB Brilliance Liquid, LN Nitric Liquid, Oxidation Fluid).
• LO Clogging Liquid LC in successive steps to perform the anodizing of said hollow parts.
• the installation according to the invention (3) intended to implement the surface treatment method illustrated, comprises at least one treatment tank (1,1 ', 1 "(7) capable of containing a treatment liquid (LS, LB, LN, LO, LC) a first conveyor chain (30), arranged at the same height as an immersion zone (Z1) of the vessel (1,1 ', 1 "...) , and able to bring each support (2) of hollow parts at said immersion zone, pushing means (4,40) for horizontally pushing each support (2) of hollow parts from the first conveyor chain (30).
• the thrust means (4,40) preferably comprise at least one hydraulic cylinder (40).
• the extraction means (4,41) preferably comprise at least one hydraulic jack (41).
• the hydraulic jacks (40) and extraction cylinders (41) are identical and a single thrust (40) and a single extraction (41) are arranged opposite one on the other side of the tank (1).
• these thrust cylinders (40) and extraction cylinders (41) are mounted directly on each tank (1,1 ', 1 ", 1" ", 1” "...) in order to constitute an autonomous module, easily interchangeable since it can be removed individually from the installation, for example in case of momentary failure or change of treatment type.
• the two conveyor chains (30,31) are capable of conveying a plurality of supports (2,2a, 2b, ...) on each of which is placed a predetermined number of said hollow pieces and each comprising at least one holding member (21,21a, 21b, ...) immobilizing each of them.
• the installation (3) comprises at least one rinsing unit (32) by water spraying disposed around at least one of the two conveyor chains (30, 31).
• the tank (1) has, in its upper part, an opening (16) at the edge of which are respectively the immersion zone (ZI) and the exit zone (ZS).
• the installation (3) comprises at least two successive treatment tanks (1,1 ', 1 ", 1' '' ') and the first (30) and the second (31) conveyor chains are continuous and arranged parallel to one another so that the first chain (30) extends along the immersion zone (ZI) of the upstream vessel (1) and the zone outlet (ZS) of the downstream tank (1a, 1 ", 1” ...) and that the second chain (31) extends along the outlet zone (ZS) of the tank upstream (1) and the immersion zone (ZI) of the downstream vessel (1 ', 1 ", V” .
• each first (30) and second (31) conveyor chain is continuous and straight.
• the installation comprises five successive tanks (1, 1 ', 1 ", 1'", 1 ""), one of which downstream (1 "") is a finishing tank of parts and the other four upstream (1,1 ', 1 ", 1'") are tanks for preparation and treatment of parts.
• the tanks (1,1 ', 1'7T ") are, in the illustrated embodiment, all of different dimensions and this, in order to have the immersion time necessary for the treatment of the hollow parts in each active liquid used in As a treatment liquid (LS, LB, LN, LO, LC)
• the vessel (1 '") is an oxidation vessel .
• the first conveying chain (30) brings the supports (2,2a, 2b ..) continuously to the level of the immersion zone (ZI) of the tank (1), which is the most upstream, then each support (2, 23,2b, ...) is pushed horizontally above the opening (16) and individually by the thrust cylinder (40) on one of the housing tracks (11) of the drum (10) forming a barrel;
• the support (2x) disposed on the same housing track (11) is pushed by the support (2) brought to the opposite end of said track (11) and is then extracted by the extraction cylinder (41) facing the thrust cylinder (40) to the second conveyor chain (31);
• the same support (2,2a, 2b, ... 2x 7) therefore follows the identical conveying direction (SC) for each chain (30,31) and therefore alternately passes from a chain (30) to the other (31) after immersion in one of the tanks (1,1 ', 1 ", 1", 1 "").
• the continuous process according to the invention advantageously makes it possible to eliminate all the existing spreaders in existing processes and consequently all the disadvantages (need to provide support structures for complex lifting beams, reduction of maintenance operations, etc.) and associated risks (numerous displacements and therefore risks of accidents).
• the continuous process according to the invention makes it possible to reduce the number of tanks required and thus to reduce the size of the treatment line. It also allows better control of water and liquid consumption as well as the effluents resulting from the treatment and thus allows an improvement of the pollution control conditions.
• the volume of the necessary liquids is reduced and therefore results in a significant saving, in particular, of active products.
• spray treatments are more reliable because the spraying time of each treatment liquid can be perfectly controlled and reproduced by controlled solenoid valves.
• drum may be provided to rotate the hollow pieces in the vessel as claimed.

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• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Electrochemistry (AREA)
• Materials Engineering (AREA)
• Metallurgy (AREA)
• Organic Chemistry (AREA)
• Chemical Treatment Of Metals (AREA)
• Coating Apparatus (AREA)
• Application Of Or Painting With Fluid Materials (AREA)
• Treatments Of Macromolecular Shaped Articles (AREA)
• Cleaning By Liquid Or Steam (AREA)

Priority Applications (13)

Applications Claiming Priority (2)

Related Child Applications (1)

Publications (1)

Family

ID=35107089

Family Applications (1)

Country Status (17)

Cited By (5)

Families Citing this family (19)

Citations (6)

Family Cites Families (28)

• 2005
  • 2005-02-09 FR FR0501323A patent/FR2883576B1/fr not_active Expired - Fee Related
• 2006
  • 2006-01-26 PT PT67091959T patent/PT1851364E/pt unknown
  • 2006-01-26 SI SI200631806T patent/SI1851364T1/sl unknown
  • 2006-01-26 BR BRPI0606879-0A patent/BRPI0606879A2/pt not_active Application Discontinuation
  • 2006-01-26 MX MX2007009595A patent/MX2007009595A/es active IP Right Grant
  • 2006-01-26 JP JP2007554590A patent/JP4982634B2/ja not_active Expired - Fee Related
  • 2006-01-26 KR KR1020127015680A patent/KR101251067B1/ko not_active Expired - Fee Related
  • 2006-01-26 RU RU2007133607/02A patent/RU2409706C2/ru not_active IP Right Cessation
  • 2006-01-26 ES ES06709195.9T patent/ES2483965T3/es not_active Expired - Lifetime
  • 2006-01-26 CA CA2595511A patent/CA2595511C/fr not_active Expired - Fee Related
  • 2006-01-26 WO PCT/FR2006/000199 patent/WO2006084973A1/fr not_active Ceased
  • 2006-01-26 US US11/883,983 patent/US8293077B2/en not_active Expired - Fee Related
  • 2006-01-26 PL PL06709195T patent/PL1851364T3/pl unknown
  • 2006-01-26 KR KR1020077020320A patent/KR20070102600A/ko not_active Ceased
  • 2006-01-26 DK DK06709195.9T patent/DK1851364T3/da active
  • 2006-01-26 CN CN2006800044412A patent/CN101115869B/zh not_active Expired - Fee Related
  • 2006-01-26 EP EP06709195.9A patent/EP1851364B1/fr not_active Expired - Lifetime
• 2012
  • 2012-04-18 US US13/450,081 patent/US20120199489A1/en not_active Abandoned
• 2014
  • 2014-07-22 CY CY20141100548T patent/CY1115346T1/el unknown

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