EP2105521A1 - Flexible Abdeckung für galvanischen Träger, Träger und Einbauverfahren - Google Patents

Flexible Abdeckung für galvanischen Träger, Träger und Einbauverfahren Download PDF

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Publication number
EP2105521A1
EP2105521A1 EP09156368A EP09156368A EP2105521A1 EP 2105521 A1 EP2105521 A1 EP 2105521A1 EP 09156368 A EP09156368 A EP 09156368A EP 09156368 A EP09156368 A EP 09156368A EP 2105521 A1 EP2105521 A1 EP 2105521A1
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EP
European Patent Office
Prior art keywords
support
galvanic
galvanic support
cover
objects
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
EP09156368A
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English (en)
French (fr)
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EP2105521B1 (de
Inventor
Gilles Renaud
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Serme
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Serme
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    • 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
    • C25D17/008—Current shielding devices
    • 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
    • C25D17/06—Suspending or supporting devices for articles to be coated
    • 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
    • C25D17/06—Suspending or supporting devices for articles to be coated
    • C25D17/08—Supporting racks, i.e. not for suspending
    • 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
    • C25D21/12—Process control or regulation

Definitions

  • the present patent application for an electrolysis current line guide cover for a galvanic support concerns the field of electroplating tools and more particularly a new system of covers intended for galvanic supports and whose purpose is to channel the current lines. in the electrolysis baths.
  • the invention thus relates to a new technique for producing these covers. Suitable galvanic supports and methods of implementation complete the invention.
  • a galvanic support is a conductive metal frame, made of metal elements (steel, brass, copper, aluminum, titanium) welded and intended to receive fastening systems: conductive fixing means to the type of clamps, clips or springs, intended to maintain the objects or parts to be electrolyzed.
  • This galvanic support is intended to form a cathode and one or more copper current flows are fixed on a cathode bar of this galvanic support, the whole being coated with a suitable vinyl plastisol to protect it from galvanic or chemical corrosive baths encountered in electrolytic surface treatment units.
  • the materials and the thickness of the treatment on the parts correspond to the specifications or norms of the customers according to the field of use of these processed parts: specifications for automobile, specifications for the cosmetic perfumery, notebook of the loads for industrial parts, specifications for telephony, specifications for sanitary for example.
  • the electroplating devices can adjust the current intensities on the power supply rectifiers of the electrolysis cells according to their specifications.
  • the laws of electrolysis make the regularity of the deposits is not respected since the parts or parts of room (s) located around the galvanic supports will have deposition thicknesses greater than those of the middle parts. This is due to one of the fundamental laws of electroplating: the law of dispersion of the current lines.
  • the objects to be treated in such a way that those who are towards the periphery
  • the galvanic support is further away from the anode than the objects located towards the center of the galvanic support forming the cathode.
  • the objects placed on the supports are all at a substantially identical distance from the anode.
  • the parts of the perimeter of the galvanic support have greater thicknesses of deposits, and possibly appearance burns, budding (tip effect) and cracks on the deposit. And, that, to have a deposit on the central parts respecting the specifications.
  • overthicknesses can have detrimental consequences for some parts, especially in perfumery, where the range of thicknesses is rigorous because of the assembly of several parts together (pump mechanisms in particular), or the strict automobile standards as regards the thicknesses for corrosion of parts.
  • a first possibility, active, is to have on the periphery galvanic supports, conductive metal elements (stainless steel or titanium) or metallizable plastic, called pull-current, arranged at a distance from objects and which are intended to attract metal ions during the electrolytic treatment of objects. Surplus copper and nickel are then deposited on these elements pulled current around. This prevents overthickness and burns objects, but it results in unnecessary consumption of metals and the possible creation of pulverulent grains of metals, non-adherent and finally cause asperities on objects.
  • a second possibility, passive, is to have between the two electrodes caches made of strips metallic (steel, stainless steel, aluminum or titanium) plasticized for electrical insulation. These covers can hide the entire galvanic support and have openings of different shapes and sizes according to the parts in order to channel the current lines and distribute them for all the objects to be treated. This results in a minimized metal deposition but these caches however have various drawbacks. Among these drawbacks may be mentioned: the excessive weight of the caches, their fragility in a context of repeated handling resulting in a risk of cracks in the plasticization and deterioration.
  • each blow or impact destroying the insulation on the cover causes a sprouting of the metal, the progressive degradation of the cache and the inconveniences of the type of those of the current-pullers.
  • these caches also cause handling difficulties for assembly and disassembly of objects with risks of accidents or occupational diseases.
  • Plastisol is typically a mixture (emulsion or suspension) of a resin of an organic polymer (usually polyvinyl chloride) with a plasticizer and which can be en masse, for example, under the action of heat.
  • the present invention provides a cover which consists of a stretched flexible sheet comprising an impermeable plastic material which advantageously replaces the known metal or rigid plastic plates. This results in particular a weight gain.
  • it becomes easier and less risky to manipulate the cache which can therefore be implemented only during the electrolysis steps for implementing its guidance function of the current lines and which can be retracted in the other steps (In particular prior chemical treatment initiation metallization), thus avoiding its activation and the electrolytic deposition of metal on its surface.
  • the flexibility of the cache allows embodiments for retraction or easy implementation with roller blind type mechanisms.
  • the material of the sheet may advantageously comprise a plastisol and, in particular, the one that avoids any metallic deposition thanks to its inhibitor, which facilitates even more the treatments since it is no longer necessary to retract the cache at certain stages of the treatment.
  • the sheet can be structured in many ways from the single sheet (single component), associations between materials or even combinations including stratified.
  • the invention therefore relates to an electrolysis current line guide cover for galvanic support, the galvanic support comprising conductive fixing means for objects to receive at least one electrolysis metal deposit in an electrolytic cell, the support galvanic and the objects forming a first extended electrode generally substantially parallel to a second electrode (the term electrode must be understood as functional and may physically correspond to an electrode or a group of electrodes), said cache being intended to be put in place between the two electrodes and having openings in relation to the objects.
  • the cover is a flexible sheet comprising an impastable plastic material of plastisol type taken in mass, the flexible sheet in place being stretched by at least one tensioning means to be substantially parallel to the electrodes.
  • stretched can be understood as a consequence of a means for rendering the sheet substantially flat and avoiding its subsidence under its own weight or significant deformation at least when it is set up to ensure its cache operation.
  • the term "installation” is used to designate the fact that the cache is placed in relation to the galvanic support (fixed or not on the galvanic support) , this relation may or may not be functional, that is to say that the cache is or not in front of the objects although being installed in connection with the galvanic support.
  • placement is used to signify the functional relationship of the cache with the galvanic support. Indeed, in the case of a sheet of plastisol in a rigid frame, the installation of the frame in front of the galvanic support ipso facto leads to the establishment functional (in consideration of the fact that to be functional the cache must be between the electrodes ).
  • the installation does not necessarily correspond to a functional installation since the installation of the cover can be made in retracted position. (above the galvanic support) of the cover. It is the same for a cache in a roll-up blind configuration, the installation of the winding mechanism cover over the galvanic support can be done in the retracted position (wound) of the cache sheet.
  • the installation can be made on the galvanic support by direct or indirect fixation, but it can also be made on a separate element of the galvanic support but which is in the vicinity of the galvanic support at least when the cache must be in place. and therefore functional.
  • This distinct element may be a holding structure, possibly mobile for placement / retraction, disposed above the electrolysis cell.
  • the invention also relates to a galvanic support comprising elements specially configured to adapt to a cache having one or more of the features described.
  • the galvanic support comprising conductive fixing means for objects to receive at least one electrolysis metal deposit in an electrolytic cell, the galvanic support and the objects forming a first extended electrode generally substantially parallel to a second electrode, an electrolysis current line guiding cover which can be placed between the two electrodes and having openings in relation to the objects, the support can have a roller blind type mechanism for the corresponding cache described.
  • the invention also relates to a method of implementing an electrolysis current line guide cover for a galvanic support, the galvanic support comprising conductive fixing means for objects to receive at least one electrolytic metal deposit in an electrolytic cell, the galvanic support and the objects forming a first extended electrode generally substantially parallel to a second electrode, said cover being intended to be placed between the two electrodes and having openings in relation to the objects, the objects undergoing treatments in chemical and electrolytic ranges, in which process, after installation of the objects on the galvanic support, is installed on the galvanic support a retractable cover as described and is left said cache in the retracted position in chemical range and is implemented said cache electrolytic range.
  • the invention also relates to a method of implementing an electrolysis current line guide cover for a galvanic support, the galvanic support comprising conductive fixing means for objects to receive at least one electrolytic metal deposit in an electrolytic cell, the galvanic support and the objects forming a first extended electrode generally substantially parallel to a second electrode, said cover being intended to be placed between the two electrodes and having openings in relation to the objects, the objects undergoing treatments in chemical and electrolytic ranges, in which process, after installation of the objects on the galvanic support, is installed and set up on the galvanic support a cache as described, the flexible sheet of said cache comprising an anti-metallization plastisol.
  • a conventional plasticized metal cover weighs about 11 to 15 kg / m 2
  • a cover according to the invention made of coated fabric weighs about 500 to 600 g / m 2 .
  • Caches made are fast use, both in individual and store version. Storage is reduced in individual or even non-existent in store version. The risks of accidents at work or occupational diseases are reduced. They also contribute to sustainable development (ISO 14000) due to the non-pollution of treatment baths by their design (plastisol anti-metallization) and / or implementation (non functional implementation of the cache in chemical range).
  • the fabric is coated on both sides with vinyl plastisol.
  • the plasticized Plastisol fabric thus obtained is fixed stretched on a light plasticized stainless steel frame which can be mounted / removed from the galvanic support.
  • the plasticized fabric thus obtained without frame or with a simple peripheral reinforcement (an extra thickness or a stainless steel or plastic rod also coated for example) can also be mounted quickly on the galvanic supports by four hooking tabs (elastics / springs for tightening the cover ) of the support, at its corners, being captured / clipped in four openings with stainless eyelets at the corners of the plasticized fabric.
  • the plasticized canvas of the cover is anti-metallization (but not necessarily if one can avoid the chemical range by using it only in electrolytic range).
  • One embodiment of the invention with a system for retraction / installation of the winding cover, roller shutter type, is possible.
  • These blinds plasticized canvas are embedded on the cathode bars of the treatment units or, then, on the galvanic supports. Just pull on the blinds after installing the objects on the galvanic brackets to put them in place.
  • the retraction / setting up can be motorized.
  • the implementation of the blind entails a higher cost of installation, but the very fast use for setting up / retracting and saving space for the storage of the covers which are directly wound in stainless steel boxes on the top of the bars. cathodic compensates for this.
  • this type of cache can be easily cut on demand for each type of object and galvanic support by laser or jet processes water or other, or even by hand.
  • the number of openings, their shapes and their arrangements are calculated by appropriate software for a substantially uniform distribution of electrolytic deposits.
  • the objects pass into electrolytic tanks for deposition of copper, nickel and final deposition (chromium, gold, bronze, etc.).
  • the cover is present electrolytic range and having openings cut according to the needs, it channels the current lines so as to concentrate them on the parts for the desired thicknesses, preserving the sensitive parts (points or rear parts for example) ) thus minimizing copper and nickel deposits.
  • the cover is simply in connection with the galvanic support.
  • the cover is permanently in the electrolysis station and it is when the galvanic support arrives in said station that the cache is in connection with the galvanic support.
  • the insertion of the galvanic support into the electrolysis bath is generally done at the top by a vertical translation of the galvanic support, the latter can for example with its latching lugs which are engaged with the cover during the arrival of the support above the bath, carry with it said cache during its descent (translation of a frame cache or unwinding a cache of a blind mechanism).
  • the cover will also come up again and can then be unhooked from the hooking tabs.
  • a galvanic support 1 forming a conductive metal grid and covered with an electrical insulating coating, plastisol preferably anti-metallization, is represented in a simplified manner because only a fastening means 3 to an object (not shown) is shown.
  • the insulating coating is absent / removed at the level of the current supply pads 2 of the galvanic cathode support. It is the same for the ends of the fastening means which are in contact with objects to be metallized.
  • At the four corners of the galvanic support are fixed four attachment tabs 4 for fixing the cover on the galvanic support.
  • these hooking lugs are resilient and form springs for tensioning a cover 7 which does not have a means of its own intended to stretch it.
  • This cover 7 (the guiding apertures of the electric current lines are schematized in a simplified manner under the reference 11) has openings with eyelets 8 stainless at its four corners and the hook ends of the hooking lugs 4 are passed through. These openings with eyelets.
  • the attachment tabs do not need to be elastic / springs.
  • These attachment lugs which are preferably metallic for reasons of mechanical strength, are also covered with an electrical insulating coating, that of the galvanic support in practice. In this example, the installation or retraction of the cover is done by installation or complete disassembly of the cover of the galvanic support.
  • the cover is shown permanently installed (while can be preferably interchangeable) on the galvanic support but not put in place (it is in the retracted position) wound in a mechanism 5 of the type store disposed above the galvanic support.
  • the mechanism 5 is arranged in height so as to be out of any bath of the chemical range and electrolytic range processing steps.
  • the cache 7 which is flexible enough to be wound on itself in the retracted position, around an axis 6 symbolized on the visible side of the mechanism 5 of the Figure 2 has two stainless steel eyelet openings 8 at its two lower corners.
  • the cover When the cover is put in place, the latter is unwound and the ends of the attachment tabs 4 fixed to the two lower corners of the galvanic support are passed through the openings with eyelets in order to immobilize the said cover in the unwrapped position. prevent the winding up in the mechanism 5.
  • the cover is plastisol coated canvas. Since the cover can be set up and retracted in a relatively simple manner, it can be set up only in electrolytic range and can then choose a conventional plastisol (untreated anti-metallization) since it will not be in contact with the baths of the chemical range.
  • the blind type mechanism can be made removable globally or in part (for example, the winding axis with the sheet) in particular for cache exchange.
  • the Figure 3 a part of cache 7 plastisol coated canvas schematically, by a cutaway view (hypothetical view in practice because the coating of the canvas allows for a coherent laminated sheet which, moreover in the case where the canvas is a woven or non-woven, causes the plastisol interpenetrating the web), the distribution of its constituents.
  • the plastisol 9 has come to coat both sides of the fabric 10.
  • the caches can be put in place, that is to say rendered functional, either during their installation (with setting up a frame with a cover or a leaf with eyelets that is stretched by elastic fastening tabs / springs of the galvanic support for example), or by setting up a cache already installed (for example the cache being already installed but wound in the manner of a blind above the support galvanic, the operator pulling it down for it to be put in place).
  • These installations, set up and retraction can be manual or automated (motorized).
  • the moments of placement of the cache may be different.
  • the cache can be put in place at the very beginning of the treatment process (after the installation of the objects on the galvanic support), from the chemical range.
  • either an anti-metallisation plastisol cover is used and it can then be put in place at any useful moment, even at the beginning of the treatment process, or, in the opposite case, sets up the cache only in the electrolytic range.
EP09156368A 2008-02-26 2009-03-26 Flexible Abdeckung für galvanischen Träger, Träger und Einbauverfahren Not-in-force EP2105521B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0851928A FR2927909B1 (fr) 2008-02-26 2008-02-26 Cache souple pour support galvanique, support et procede de mise en oeuvre

Publications (2)

Publication Number Publication Date
EP2105521A1 true EP2105521A1 (de) 2009-09-30
EP2105521B1 EP2105521B1 (de) 2011-08-31

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP09156368A Not-in-force EP2105521B1 (de) 2008-02-26 2009-03-26 Flexible Abdeckung für galvanischen Träger, Träger und Einbauverfahren

Country Status (4)

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EP (1) EP2105521B1 (de)
AT (1) ATE522641T1 (de)
ES (1) ES2371526T3 (de)
FR (1) FR2927909B1 (de)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US299802A (en) * 1884-06-03 Process of and apparatus for making solid rings of plastic compo
GB1204701A (en) * 1967-08-09 1970-09-09 Howson Algraphy Ltd Improvements in and relating to electrolytic cells and to processes of electrolysis
US4297197A (en) * 1980-11-13 1981-10-27 International Telephone And Telegraph Corp. Electroplating rack
EP0607717A2 (de) 1992-12-17 1994-07-27 Dicoplast Geschütztes Gerät für die Galvanik, Verfahren zum Schützen und Anlage zur Verwendung dieses Verfahrens
WO1998049375A2 (de) * 1997-04-25 1998-11-05 Atotech Deutschland Gmbh Vorrichtung zum elektrolytischen behandeln von plattenförmigem behandlungsgut und verfahren zum elektrischen abschirmen von randbereichen des behandlungsgutes bei der elektrolytischen behandlung
JPH11246999A (ja) * 1998-03-03 1999-09-14 Ebara Corp ウエハのメッキ方法及び装置
WO2004059045A2 (de) * 2002-12-23 2004-07-15 METAKEM Gesellschaft für Schichtchemie der Metalle mbH Anode zur galvanisierung

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3210288A1 (de) * 1982-03-20 1983-09-29 Beiersdorf Ag, 2000 Hamburg Abdeckband fuer galvanische prozesse
FR2857367B1 (fr) * 2003-07-11 2005-10-07 Dicoplast Nouveau plastisol destine a revetir des outillages de galvanoplastie, enrichi d'un inhibiteur de catalyse

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US299802A (en) * 1884-06-03 Process of and apparatus for making solid rings of plastic compo
GB1204701A (en) * 1967-08-09 1970-09-09 Howson Algraphy Ltd Improvements in and relating to electrolytic cells and to processes of electrolysis
US4297197A (en) * 1980-11-13 1981-10-27 International Telephone And Telegraph Corp. Electroplating rack
EP0607717A2 (de) 1992-12-17 1994-07-27 Dicoplast Geschütztes Gerät für die Galvanik, Verfahren zum Schützen und Anlage zur Verwendung dieses Verfahrens
WO1998049375A2 (de) * 1997-04-25 1998-11-05 Atotech Deutschland Gmbh Vorrichtung zum elektrolytischen behandeln von plattenförmigem behandlungsgut und verfahren zum elektrischen abschirmen von randbereichen des behandlungsgutes bei der elektrolytischen behandlung
JPH11246999A (ja) * 1998-03-03 1999-09-14 Ebara Corp ウエハのメッキ方法及び装置
WO2004059045A2 (de) * 2002-12-23 2004-07-15 METAKEM Gesellschaft für Schichtchemie der Metalle mbH Anode zur galvanisierung

Also Published As

Publication number Publication date
ATE522641T1 (de) 2011-09-15
ES2371526T3 (es) 2012-01-04
FR2927909B1 (fr) 2010-03-26
FR2927909A1 (fr) 2009-08-28
EP2105521B1 (de) 2011-08-31

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