EP2893056B1 - Galvanische beschichtung von behandlungsgut unter verwendung einer innenanode - Google Patents

Galvanische beschichtung von behandlungsgut unter verwendung einer innenanode Download PDF

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Publication number
EP2893056B1
EP2893056B1 EP13750886.7A EP13750886A EP2893056B1 EP 2893056 B1 EP2893056 B1 EP 2893056B1 EP 13750886 A EP13750886 A EP 13750886A EP 2893056 B1 EP2893056 B1 EP 2893056B1
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EP
European Patent Office
Prior art keywords
electrode
treated
contact
carrier
frame part
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.)
Active
Application number
EP13750886.7A
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German (de)
English (en)
French (fr)
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EP2893056A2 (de
Inventor
Roberto Lodici
Guenther Tratz
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.)
Atotech Deutschland GmbH and Co KG
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Atotech Deutschland GmbH and Co KG
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Publication of EP2893056A2 publication Critical patent/EP2893056A2/de
Application granted granted Critical
Publication of EP2893056B1 publication Critical patent/EP2893056B1/de
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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
    • C25D17/005—Contacting 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
    • C25D17/007—Current directing 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
    • C25D17/00—Constructional parts, or assemblies thereof, of cells for electrolytic coating
    • C25D17/10—Electrodes, e.g. composition, counter electrode
    • C25D17/12—Shape or form
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/02—Electroplating of selected surface areas
    • 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 invention relates to a device, a system and a method for electroplating articles to be treated which has a cavity, in particular for electroplating using an acidic electrolyte, more particularly using an acidic electrolyte for depositing an alloy, e.g. an acid zinc-nickel electrolyte.
  • the item to be treated is introduced into a galvanic bath which is located in a treatment container.
  • metal anodes are arranged opposite the material to be treated.
  • a galvanic deposition of metal takes place on the item to be treated.
  • the geometry of the material to be treated can lead to a lower current density within the cavity of the material to be treated than at the outer surface, so that the amount of material or material thickness deposited on the inner surface of the material to be treated per area and time is smaller than on the outer surface of the material to be treated .
  • a varying thickness of the coating may be undesirable for the subsequent use of the material to be treated.
  • the JP S59 43899 A which serves as a basis for the preamble of the independent claims, discloses coating apparatuses and coating methods using a replaceable auxiliary anode.
  • the JP S59 43896 A , the DE 35 19 906 C1 , the US 6 103 076 A , the DE 103 08 731 A1 and the JP 2001 335993 A disclose further examples of coating devices and coating methods in which an electrode is arranged so that it at least partially protrudes into a cavity of a material to be treated.
  • a device for the galvanic coating of a material to be treated which has a cavity with an inner surface to be coated, is specified.
  • the device is adapted for releasable coupling to a treatment tank.
  • the device comprises a first frame part with a first electrode for holding and electrically contacting the material to be treated.
  • the device comprises a support for a second electrode which projects into the cavity of the material to be treated held by the first electrode.
  • the carrier is mechanically connected to the first frame part such that the carrier is electrically insulated from the first frame part.
  • the carrier can be located on a second frame part, wherein the first and the second frame part are mechanically connected to each other and electrically isolated from each other.
  • the first and second electrodes are electrically isolated from each other.
  • the first electrode can be cathodically polarized and the second electrode can be anodically polarized, at least in the time average.
  • the device can be designed so that a contact of the second electrode is avoided with the material to be treated.
  • the device is preferably designed as a frame with the first frame part and the second frame part.
  • the device is adapted for releasable coupling by suitable receptacles for holding the device to a treatment container. For treatment, the device is lowered with the material held thereon in the electrolyte-filled treatment container. It is held during the treatment of suitable shots and is contacted electrically.
  • the material to be treated can be positioned in a galvanic bath, wherein an inner anode in the cavity comes into effect during the treatment. Through the inner anode, an efficient coating of the inner surface can be achieved.
  • the carrier is attached to a second frame part.
  • the first frame part and the second frame part can be mechanically rigidly connected to each other.
  • the device may comprise electrically insulating connecting pieces, which the first frame part and the connect the second frame part rigidly together.
  • the frame parts and the carrier may consist of electrically conductive material and are electrically insulated from the bath electrolyte, for example by a coating.
  • the second electrode is a soluble anode.
  • the anode is attached to the carrier.
  • the anode is attached to the carrier so that it can be easily inserted, e.g. with the help of pliers, assembled and disassembled, in particular destructive can be dismantled to allow quick and cost-effective installation and removal.
  • the attachment between anode and carrier is well electrically conductive.
  • the anode may have a connecting piece and the carrier may have the matching counterpart.
  • the attachment between anode and carrier can be a threaded connection.
  • the connector may have an internal thread and the counterpart an external thread.
  • Other attachment mechanisms such as a bayonet mechanism or detent locking mechanism, may also be used to secure the soluble anode to the second frame member in a non-destructively releasable manner.
  • the second electrode is made up of several segments.
  • the plurality of segments of a second electrode are held by a common contact pin and electrically contacted.
  • the contact pin is the carrier for the second electrode.
  • the plurality of segments may be made of a soluble material that dissolves in the electrolyte.
  • new segments may be affixed to the contact post after the segments most recently attached to the contact post have dissolved or dissolved so far that they must be replaced.
  • the contact pin may be configured so that it does not dissolve in the operation of the device or dissolves more slowly than the plurality of segments attached to the second electrode.
  • the contact pin may consist of a material which does not dissolve in anodic polarization.
  • the plurality of segments may be made of the soluble metal material with which the material to be treated is to be coated. At least two of the plurality of segments attached to the same contact pin may be made of different materials.
  • the plurality of segments may be rotationally symmetric about an axis.
  • the plurality of segments may be spherical, disc-shaped or cylindrical.
  • the plurality of segments may have a through hole or through hole for attachment to the contact pin, through which a portion of the contact pin may be performed.
  • a securing device may be attached to the contact pin to secure the plurality of segments to the contact pin.
  • a spacer may be coupled to at least one of the segments, or a plurality of spacers may be coupled to provide a clearance between the segment and the second frame member and / or a gap between the segment and another segment.
  • the spacer may be arranged on the contact pin.
  • the spacer may have a through hole or a through bore for attachment to the contact pin through which a portion of the contact pin may be made.
  • the soluble anode and the carrier may be arranged to prevent liquid entry of the electrolyte into the counterpart of the carrier when mounted.
  • the soluble anode and the carrier may have sealing surfaces which, upon attachment of the soluble anode to the carrier, engage each other such that passage of liquid of the electrolyte through the mutually coupled sealing surfaces is inhibited.
  • the device can be used for the galvanic coating of the material to be treated with a metal, e.g. Copper, nickel, zinc and tin.
  • a metal e.g. Copper, nickel, zinc and tin.
  • the device can be used for the galvanic coating of the material to be treated with only one metal.
  • the soluble anode can then consist of the metal.
  • the device can be used for a galvanic coating of the material to be treated with an alloy comprising at least a first metal and a second metal.
  • a larger amount of the first metal than the second metal can be deposited on the material to be treated.
  • the soluble anode may then consist of the second metal.
  • the first metal can be zinc (Zn).
  • the second metal may be nickel (Ni).
  • outer anodes can be mounted in the treatment container, for example at the edge of the treatment container.
  • outer anodes of the first metal and outer anodes of the second metal may be mounted in the treatment vessel.
  • the first electrode may have a first longitudinal axis and the second electrode may have a second longitudinal axis.
  • the direction of the first longitudinal axis may deviate from the horizontal such that the first electrode is directed obliquely upward in the treatment state. This allows a wedging of the material to be treated on the first electrode and thus a tight fit and a good electrical contact.
  • the direction of the second longitudinal axis may be different from the direction of the first longitudinal axis. It is such that a homogeneous electric field is achieved at the cavity surface.
  • the first electrode may have a portion with a conical outer surface.
  • a holding opening of the material to be treated can be guided over the conical outer surface of the first electrode.
  • the second electrode and the support for the second electrode may be dimensioned so that the electrically conductive surface of the second electrode extends out of the cavity of the material to be treated.
  • An edge of the cavity may define a plane from which the electrically conductive surface of the second electrode protrudes outwardly by 10 to 30 mm, for example by 20 mm.
  • the carrier may be designed so that it does not protrude into the cavity of the material to be treated.
  • the first frame part may comprise a first contact section electrically connected to the first electrode and configured for releasable coupling to a first mating contact.
  • the second frame member may include a second contact portion configured for releasable coupling with a second mating contact, wherein the second contact portion is spaced from the first contact portion and electrically insulated from the first contact portion.
  • the first frame part may comprise a plurality of first electrodes.
  • the plurality of first electrodes may each have the same orientation.
  • a plurality of second electrodes, each acting as an inner anode, may be secured to the second frame member.
  • the plurality of second electrodes may each have the same orientation. In this way, the simultaneous galvanic coating of several components is facilitated.
  • the relative positions of the first electrode and associated second electrode on the device may vary to facilitate the treatment of different components.
  • a system for the galvanic coating of a material to be treated which comprises the device according to an embodiment of the invention and a treatment container.
  • the treatment container comprises a device for mechanically supporting and electrically contacting the device with the material to be treated held thereon.
  • the first and / or second mating contact may be attached.
  • the first and / or second mating contact may be elastically deformable to ensure good electrical contact with the current / voltage feed.
  • outer anodes other than the inner anode may be attached.
  • the outer anodes can be mounted completely outside the cavity of the material to be treated.
  • External anodes of a first metal and outer anodes of a different second metal may be used.
  • the first metal can be zinc (Zn).
  • the second metal may be nickel (Ni).
  • a number of outer anodes of the first metal may be larger than a number of outer anodes of the second metal.
  • the second electrodes may be made of the second metal.
  • the outer anodes attached to the treatment tank and the second electrodes fixed to the second frame part and acting as inner anodes may be configured such that a surface area of the inner anodes is from 3 to 30%, more preferably from 5 to 20%, and most preferably from 7 to 15 % of the total surface area of the anodes used on the treatment tank.
  • the system may be configured such that, during operation, a current flowing through the second electrodes accounts for 3 to 30% of the total current flowing through the various anodes (inner anodes and outer anodes), in particular from 5 to 20% of the total across the various anodes flowing current and in particular from 7 to 15% of the total current flowing through the various anodes current.
  • the treatment tank may include means for circulating the galvanic bath in the treatment tank.
  • the device may be configured to be time sequentially attached to a plurality of treatment containers of the system. Several of the treatment tanks can be configured to be time sequentially attached to a plurality of treatment containers of the system. Several of the treatment tanks can be configured to be time sequentially attached to a plurality of treatment containers of the system. Several of the treatment tanks can be configured to be time sequentially attached to a plurality of treatment containers of the system. Several of the treatment tanks can be used.
  • the system may comprise the item to be treated, which is held on the device so that the second electrode protrudes into the cavity of the material to be treated, without touching the item to be treated.
  • a method for the galvanic coating of a material to be treated which has a cavity with an inner surface to be coated, is specified.
  • the material to be treated is attached to a device.
  • the device comprises a first frame part having a first electrode and a support for a second electrode mechanically connected to the first frame part, the first electrode and the second electrode being electrically insulated from one another on the device.
  • the material to be treated is attached to the device so that it is held by the first electrode and that the second electrode protrudes into the cavity of the material to be treated.
  • the device with the material to be treated held thereon is detachably attached to a treatment container such that the material to be treated is immersed in a galvanic bath.
  • a first voltage can be applied between the second electrode and the first electrode, or a first current can be fed in.
  • a second voltage may be applied between outer anodes and the first electrode, or a second current may be supplied.
  • First and second current or first and second voltage can be adjusted independently of each other via different power or voltage sources.
  • Embodiments of the invention may generally be used to coat metal parts or parts having a conductive surface.
  • the embodiments are described in the context of a system for treating laundry in which several pieces of parts having a conductive surface are immersed in a galvanic bath.
  • the devices, Systems and methods may generally be used to coat laundry having a cavity with an interior surface, and to provide not only an exterior surface but also the interior surface with a coating.
  • the coating may be a coating of a metal or an alloy of several metals.
  • the material to be treated can be provided with a coating of zinc (Zn) and nickel (Ni), preferably out of an acidic electrolyte, wherein a larger proportion of Zn is contained in the coating.
  • Zn zinc
  • Ni nickel
  • devices, systems and methods are not limited to coating with these materials.
  • identical reference numerals denote identical elements.
  • FIG. 1 Figure 3 is a perspective view of a system 1 for electroplating laundry according to an embodiment.
  • the system 1 comprises a treatment container 2 and a device 10.
  • the device 10 is designed as a frame on which the material to be treated is held and, moreover, also acts as a carrier for one or more inner anodes, which protrude into a cavity of the material to be treated.
  • the treatment tank 2 is filled during operation with a galvanic bath.
  • Outer anodes 3, z. B. soluble anodes are mounted in the treatment tank 2.
  • the outer anodes 3 may be attached to an edge of the treatment tank.
  • some of the outer anodes 3 may be made of the first metal and the remaining outer anodes 3 may be made of the second metal.
  • the first metal Zn and the second metal may be Ni.
  • the material to be treated can be coated so that the coating comprises a larger amount of Zn and a smaller amount of Ni, for example 10% Ni.
  • the system 1 uses one or more inner anodes.
  • the inner anode protrudes into a cavity of the material to be treated.
  • the inner anode is attached to the device 10, which also has a first electrode serving as a cathode, on which the material to be treated is held.
  • the device 10 can be reversibly detachably coupled to the treatment container 2, which comprises a receiving device for holding and contacting the device 10.
  • the treatment container 2 which comprises a receiving device for holding and contacting the device 10.
  • the device 10 can be placed on the treatment container 2, so that the material to be treated held on the device 10 is immersed in the galvanic bath.
  • a receiving device 4 of the treatment container 2 can Have contact surfaces 5, on which the device 10 can be placed.
  • a voltage supply can take place via contacts on the device 10 and corresponding mating contacts 6, 7 on the treatment container 2.
  • a power feed can be made to the device 10 at two spatially separated locations. In this case, a potential difference between the inner anode, which is attached to the device 10, and the cathode, which holds the material to be treated generated.
  • the mating contact 6, with which, for example, the cathode of the device 10 can be pulled to a negative potential, and the mating contact 7, with which, for example, the inner anode can be pulled to a positive potential, can be attached to the treatment vessel 2.
  • the power supply of the external anodes is not shown.
  • Embodiments of the apparatus 10 will be described with reference to FIG FIG. 2 to FIG. 12 described in more detail, with reference to FIG. 10 an embodiment in which the second electrode consists of a plurality of segments, which are independently attachable to and removable from a carrier, will be described according to the claimed embodiments.
  • FIG. 2 shows a plan view of the device 10 and FIG. 3 shows a side view of the device 10.
  • the device 10 acts as a frame for used as cathodes first electrodes that hold the material to be treated, and used as inner anodes second electrodes, which protrude into a cavity of the material to be treated.
  • the device 10 has a support beam 13.
  • the support beam 13 has bearing surfaces 14 which can be placed on contact surfaces 5 of the receiving device 4.
  • Contacts 16, 17 for current injection are provided on the device 10.
  • the device 10 comprises a first frame part 11 and a second frame part 12.
  • the first frame part 11 and the second frame part 12 are mechanically connected to each other.
  • the first frame part 11 and the second frame part 12 can be rigidly connected to each other.
  • the device 10 may comprise a plurality of connecting pieces 15, which rigidly connect the first frame part 11 and the second frame part 12 with each other.
  • the connecting pieces 15 may consist of an electrically insulating material.
  • the first frame part 11 and the second frame part 12 may have on their surface an electrically insulating coating, for example based on PTFE. However, such a coating leaves exposed surfaces of the first electrodes 21 and second electrodes 22 described below.
  • the first frame part 11 and the second frame part 12 each have an electrically conductive material, eg copper, brass, titanium, which has an electrically conductive connection between the first contact 16 and the first electrodes 21 acting as cathodes or an electrically conductive one Connection between the second contact 17 and acting as inner anode second electrodes 22 produces.
  • the first electrode 21 may be made of stainless steel. It can be soldered to the first frame.
  • the first frame part 11 has a first electrode 21.
  • the first frame part 11 may have a plurality of first electrodes 21.
  • the first electrodes 21 are each arranged to hold a material to be treated 8.
  • a first electrode 21 can be inserted into a corresponding passage opening or another recess of the material to be treated 8, so that the material to be treated 8 is held on the first electrode 21.
  • the material to be treated can be polarized negatively, ie cathodically, via the first electrode 21 in order to carry out a galvanic coating process.
  • At least a second electrode 22 is attached to the second frame part 12.
  • the second frame part 12 has at least one carrier 23.
  • the second frame part 12 may have a plurality of carriers 23.
  • a plurality of second electrodes 22 may be attached to the second frame part 12.
  • Each second electrode 22 may be associated with a first electrode 21.
  • the second electrodes 22 act during operation as inner anodes.
  • the second electrodes 22 are arranged so that a second electrode 22 in each case protrudes into a cavity of the material to be treated 8, which is held on an associated first electrode 21.
  • a power supply takes place during operation via the contacts 16, 17 on the device and the associated mating contacts 6, 7 on the treatment vessel.
  • a voltage applied between the mating contacts 6, 7 can cause a potential difference between the first electrodes 21 and the second electrodes 22 associated therewith via the first frame part 11 and the second frame part 12. All first electrodes 21 may be maintained at the same negative electrical potential. All second electrodes 22 may be maintained at the same positive electrical potential.
  • the second electrode 22 which protrudes into the cavity of the material to be treated 8
  • a higher current density in the cavity of the material to be treated 8 can be achieved in the galvanic coating. It can also be a more uniform thickness of the coating on the inner and outer surfaces of the material to be treated 8 can be achieved.
  • the arrangement of the first electrode 21 and the second electrode 22 is for the region 19 of FIG FIG. 3 in FIG. 4 and FIG. 5 more clearly shown in enlarged perspective views.
  • the item to be treated 8 has a cavity 9, the surface of which is also to be provided with a coating.
  • a recess 25 of the material to be treated 8 can be guided over the first electrode 21.
  • the material to be treated 8 is held by the first electrode 21 and electrically contacted.
  • the first electrode 21 may have a portion with a cone-shaped outer surface 24.
  • the item to be treated 8 can be held so that it is keyed to the cone-shaped outer surface 24.
  • the material to be treated 8 can be held by the first electrode 21 such that a longitudinal axis of the recess 25 is tilted against a first longitudinal axis 31 of the first electrode 21.
  • the carrier 23 and the attached second electrode 22 are arranged so that the second electrode 22 protrudes into the cavity 9.
  • the second electrode 22 is arranged so as not to touch the material to be treated 8 held by the associated first electrode 21.
  • the second electrode 22 may protrude substantially centrally into the cavity 9. But there are also other spatial arrangements possible.
  • the first electrode 21 may have a first longitudinal axis 31.
  • the second electrode 22 may be the (in FIG. 7 shown) second longitudinal axis 32 have.
  • both the first longitudinal axis 31 and the second longitudinal axis 32 may be tilted relative to a horizontal direction.
  • the first longitudinal axis 31 and the second longitudinal axis 32 may have different directions.
  • the second electrode 22 may be made of the first metal or the second metal. If the material to be treated 8 is to be coated so that the coating comprises a larger proportion of the first metal and a smaller proportion of the second metal, the second electrode 22 can be made of the second metal.
  • the treatment tank 2 may have a larger number of outer anodes 3 made of the first metal than the second metal.
  • the second electrode 22 used as the inner anode may be made of the metal for which a smaller number of outer anodes 3 are attached to the treatment tank.
  • the first metal may be, for example, Zn.
  • the second metal may be Ni, for example.
  • the surface of the outer anodes 3 and the surface of the second electrodes 22 acting as inner anodes may be matched to one another in the system 1.
  • the outer anodes 3 and the second electrodes 22 fixed to the second frame part 12 may be configured such that a surface area of the inner anodes 22 is from 3 to 30% of the total surface area of the anodes.
  • the system 1 may be configured such that, in operation, a current flowing through the second electrodes 22 is a proportion of 3 to 30% of the total current flowing through the various anodes (inner anodes 22 and outer anodes 3).
  • the second electrodes 22 may be soluble in the electrolyte when the material to be treated is coated.
  • the second electrodes 22 may be connected to the beams 23 of the second frame member 12 such that they can be non-destructively releasably coupled to the beams 23 and attached thereto by simple means such as pliers. This will be exemplified for a second electrode 22 with reference to FIG FIG. 6 to FIG. 8th described in more detail.
  • a corresponding configuration can be used several times.
  • FIG. 6 shows a perspective view of a portion of the first frame part 11.
  • a surface of the first frame part 11 has an electrically insulating coating 18.
  • the coating 18 may also cover an outer surface of the carrier 23.
  • the carrier 23 has an electrically conductive surface for coupling to the second electrode 22.
  • One end 26 of the carrier 23 may be positioned so that the end 26 does not protrude into the cavity 9.
  • FIG. 7 shows a sectional view along a longitudinal axis 32 of the second electrode 22 and the carrier 23, when the second electrode 22 is fixed to the carrier 23.
  • FIG. 8th shows an enlarged view in a state in which the second electrode 22 is not attached to the carrier 23.
  • the second electrode 22 and the carrier 23 have coupling means with which the second electrode 22 can be fixed to the carrier 23 in such a way that it can be detached again from the carrier 23 in a non-destructive manner.
  • the second electrode 22 may have an internal thread 33, and the carrier 23 may have a matching external thread 34.
  • the second electrode 22 may have an external thread and the carrier 23 may have a corresponding thereto Have internal thread.
  • the attachment mechanism is configured to make an electrically conductive connection.
  • the carrier 23 and the second electrode 22 may be configured to form a seal 24 when the second electrode 22 is attached to the carrier 23.
  • the second electrode 22 may have a sealing surface 35 at one axial end.
  • the carrier 23 may have a corresponding sealing surface 36 at one axial end. When the second electrode 22 is connected to the carrier 23, the sealing surfaces 35, 36 may come into abutment with one another such that a seal 24 is formed to prevent ingress of electrolyte.
  • the detachable attachment mechanism for attaching a soluble anode allows easy replacement of the soluble anode when needed.
  • the second electrodes 22 of the device 10 can be replaced by new soluble anodes.
  • the second electrode 22 does not have to be arranged completely in the cavity 9 of the material to be treated 8, but can protrude outward from the cavity 9.
  • FIG. 9 shows a sectional view along the longitudinal axis of the second electrode 22.
  • the second electrode 22 protrudes into the cavity 9.
  • the cavity 9 has an inner surface 51 of the material to be treated as a lateral edge.
  • the second electrode 22 is arranged so that it is spaced from the material to be treated 8 and this does not touch.
  • a portion of the second electrode 22 adjacent to the carrier 23 may be disposed outside the cavity 9.
  • the second electrode 22 may project outwardly from the cavity 9 by a length 53.
  • the length 53 may be determined as a distance between an end of the second electrode 22 and a plane 52.
  • the length 53 may be, for example, 10 to 30 mm.
  • the carrier and / or the second electrode have in devices according to embodiments other embodiments than those with reference to FIG. 6 to FIG. 8th described embodiments.
  • the second electrode consists of a plurality of individual segments that are independently removable from the carrier and / or attachable to the carrier.
  • the coupling between the second electrode and the carrier can be realized other than by a threaded connection.
  • FIG. 10 shows a side view along the longitudinal axis of a second electrode 42.
  • An embodiment of the carrier and the second electrode 42, as described with reference to FIG. 10 can be described in the device 10 of FIG. 2 be used.
  • At least a second electrode 42 is attached to the second frame part 12 of the device 2.
  • the second frame part 12 has at least one carrier, which is a contact pin 43.
  • the second frame part 12 may have a plurality of contact pins 43 which each act as a support for a second electrode.
  • the second electrode 42 is attached to the contact pin 43.
  • a plurality of second electrodes 42 may be attached to the second frame part 12.
  • the contact pin 43 and the second electrode 42 attached thereto are arranged so that the second electrode 42 protrudes into the cavity 9 when the material to be treated is held by the first electrode 21.
  • the second electrode 42 is arranged so as not to touch the material to be treated 8 held by the associated first electrode 21.
  • the second electrode 42 is constructed of a plurality of segments 45-48.
  • the plurality of segments 45-48 are independently attachable to the contact pin 43. and removable from the contact pin 43.
  • the plurality of segments 45-48 may abut each other when attached to the contact pin 43.
  • the plurality of segments 45-48 of the second electrode 42 may be held over the common contact pin 43 and electrically contacted.
  • the plurality of segments 45-48 and the contact pin 43 are configured such that the contact pin 43 contacts and electrically contacts each of the plurality of segments 45-48 when the plurality of segments 45-48 are attached to the contact pin 43.
  • the contact pin 43 may be designed so that it does not dissolve in the operation of the device 10 in the electrolyte.
  • the contact pin 43 may be configured such that it dissolves more slowly, in particular much slower, during operation of the device 10 than at least one of the plurality of segments 45-48.
  • the contact pin 43 may be straight or curved.
  • the plurality of segments 45-48 of the second electrode 42 may each consist of a soluble material with which the material to be treated 8 is to be coated. In operation of the device 10, the plurality of segments 45-48 resolve.
  • the multiple segments 45-48 may all be made of a metal material which is soluble in the electrolyte when the material to be treated 8 is coated.
  • the plurality of segments 45-48 of the second electrode 42 which are mounted on the same contact pin 43, may be made of different materials.
  • the material may be different from at least two of the plurality of segments 45-48.
  • At least two of the segments 45-48 may be made of different metals.
  • the contact pin 43, to which the plurality of segments 45-48 are attached, may be made of a material that is different than the material of at least one of the plurality of segments 45-48.
  • the contact pin 43 may consist of a material which does not dissolve in anodic polarization.
  • the contact pin 43 may be made of titanium or niobium, for example.
  • the plurality of segments 45-48 of the second electrode 42 may be attached to the contact pin 43 in different ways. At least one of the segments 45-48 of the second electrode 42 may have a recess 49 through which the contact pin 43 can pass.
  • the recess 49 may be formed as a through hole or bore in the corresponding segments 45-48.
  • An inner diameter of the recess 49 may each be adapted to the outer diameter of the contact pin 43.
  • the second electrode 42 may be configured such that each of the plurality of segments 45-48 attached to a contact pin 43 has the recess 49 through which the contact pin 43 is passed.
  • connections may be used to attach at least one of the plurality of segments 45-48 to the contact pin.
  • at least one of the segments 45-48 may be threadedly attached to the contact pin 43, similarly as with reference to FIG FIG. 8th has been described.
  • the plurality of segments 45-48 may each have an identical geometry.
  • the plurality of segments 45-48 may be rotationally symmetric about a central axis of the recess 49.
  • the plurality of segments 45-48 may be, for example, spherical, disc-shaped or cylindrical.
  • the device 10 may include a securing device 44.
  • the securing device 44 can at the
  • Contact pin 43 may be attached to prevent inadvertent removal of the plurality of segments 45-48 of the contact pin 43.
  • the securing device 44 may be non-destructively releasably fastenable to a free end of the contact pin 43, which is not attached to the second frame part 12.
  • the securing device 44 may comprise, for example, a nut in a threaded engagement with a thread of the contact pin 43 or a splint lock.
  • the non-destructively releasable attachment mechanism for attaching the plurality of segments 45-48 of the soluble second electrode 43 the plurality of segments 45-48 can be easily replaced as needed.
  • at least one or all of the plurality of segments 45-48 may be replaced for each second electrode 42 of the device 10.
  • new segments 45-48 can be attached to the corresponding contact pin 43.
  • a spacer may be coupled to at least one of the segments 45-48, or a plurality of spacers may be coupled.
  • a spacer may be provided to provide a clearance between the segment 45 and the second frame member 12.
  • a spacer may be provided to adjust a distance between one of the segments 45-48 and an immediately adjacent segment 45-48.
  • the spacer may be attached to the contact pin 43.
  • the spacer may have for attachment to the contact pin 43 has a through hole or a through hole through which a portion of the contact pin 43 may be performed.
  • FIG. 11 1 illustrates an embodiment of an electrically conductive connection between the contacts 16, 17 of the device 10 and the mating contacts 6, 7.
  • a voltage is applied between the second electrodes 22 used as inner anodes and the first electrodes 21 used as cathodes, which are the Keep the material to be treated, created on the device 10.
  • the contacts 16, 17 of the device 10 are electrically conductively coupled to the mating contacts 6, 7, which may be attached to the treatment tank 2.
  • the mating contacts 6, 7 may each be formed by resilient metal parts, such as spring-loaded contact jaws 55-58, to compensate for dimensional inaccuracies of the contacts 16, 17.
  • Devices with a first frame part 11 and a carrier 23 for an inner anode, as described with reference to FIG. 1 to FIG. 11 can be used in a variety of systems for electroplating.
  • the Device 10 may be used in systems comprising multiple treatment vessels.
  • the device 10 with the material to be treated held thereon can be lifted from a treatment container to a further treatment container.
  • FIG. 12 is a schematic representation of a system 61 for electroplating.
  • the system 61 comprises the treatment tank 2 and a further treatment tank 62.
  • the further treatment tank 62 may have a voltage supply for the apparatus 10.
  • the further treatment tank 62 may include outer anodes 63.
  • the further treatment tank 62 can be used for rinsing the material to be treated or for purely chemical treatment of the material to be treated. Additional treatment containers may be provided.
  • the apparatus 10 is attached to the treatment tank 2.
  • a galvanic bath 64 is up to a level 65.
  • the device 10 is lifted to the further treatment tank 62.
  • a treatment liquid 66 is accumulated up to a level 67.
  • the device 10 is attached to the further treatment tank 62 so that the material to be treated 8 is immersed in the treatment liquid 66.
  • the device can also be configured such that it has only one second electrode acting as an inner anode and an associated first electrode.
  • the cavity of the material to be treated may have a cylindrical shape, the devices and methods can also be used in other shaped cavities.
  • the shape of the second electrode may be adapted to the shape of the cavity to produce a homogeneous current density in the cavity. So the electrode rod a Have thickening or bent. Also, two or more second electrodes may be disposed in a cavity. Furthermore, the second electrode may also be partially surrounded by an insulating layer in order to reduce deposition at specific locations of the cavity.
  • the devices, systems and methods of the various embodiments can be used in the treatment of metalware or other parts having a conductive surface that has a cavity.
  • An example of such items to be treated is a caliper.
  • Devices, systems and methods according to the various embodiments can be used in particular for the galvanic coating of material to be treated, which has an inner surface to be coated.

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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)
  • Electroplating Methods And Accessories (AREA)
EP13750886.7A 2012-09-04 2013-08-22 Galvanische beschichtung von behandlungsgut unter verwendung einer innenanode Active EP2893056B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012017493A DE102012017493B3 (de) 2012-09-04 2012-09-04 Vorrichtung, System und Verfahren zum galvanischen Beschichten von Behandlungsgut unter Verwendung einer Innenanode
PCT/EP2013/067471 WO2014037229A2 (de) 2012-09-04 2013-08-22 Galvanische beschichtung von behandlungsgut unter verwendung einer innenanode

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EP2893056A2 EP2893056A2 (de) 2015-07-15
EP2893056B1 true EP2893056B1 (de) 2016-11-16

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CN (1) CN104641023B (zh)
DE (1) DE102012017493B3 (zh)
ES (1) ES2613873T3 (zh)
MX (1) MX2015002837A (zh)
PT (1) PT2893056T (zh)
TW (1) TWI585243B (zh)
WO (1) WO2014037229A2 (zh)

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DE202015005883U1 (de) 2015-08-20 2016-11-23 Bertold Oberle Ohg Eintauchhalterung
DE102016119250B4 (de) 2016-10-10 2022-06-09 Bolta Werke Gmbh Galvanisiersystem und -verfahren
CN106435699A (zh) * 2016-11-09 2017-02-22 重庆长安工业(集团)有限责任公司 小直径薄壁开口环类零件镀锌挂具
CN106637369B (zh) * 2016-12-14 2018-09-25 淮海工业集团有限公司 一种碗型镀件电镀挂具
WO2019210264A1 (en) * 2018-04-27 2019-10-31 Modumetal, Inc. Apparatuses, systems, and methods for producing a plurality of articles with nanolaminated coatings using rotation
CN113106526B (zh) * 2021-04-02 2022-02-11 贵州航天风华精密设备有限公司 零件电镀快速装夹装置和方法

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JPS5943899A (ja) * 1982-09-07 1984-03-12 Kiyousan Denki Kk 内面メツキ装置に使用される補助陽極
JPS5943896A (ja) * 1982-09-07 1984-03-12 Kiyousan Denki Kk 金属物の内面メツキ方法及び装置
DE3519906C1 (de) * 1985-06-04 1986-05-07 Hubert Altehülshorst GmbH, 4835 Rietberg Verfahren und Vorrichtung zur galvanischen Beschichtung eines Hohlkörpers mit verschieden gerichteten Ausnehmungen oder Hinterschneidungen und die Anwendung des Verfahrens
DE4202408A1 (de) * 1991-05-21 1992-11-26 Schering Ag Aufhaengung fuer eine anodenanordnung zum einsatz in anlagen zur elektrolytischen behandlung von werkstuecken
DE4330346C1 (de) * 1993-09-08 1994-11-03 Stohrer Doduco Gmbh & Co Vorrichtung zum anodischen Oxidieren von Werkstücken
JP3081558B2 (ja) * 1997-04-30 2000-08-28 株式会社ダイワエクセル 内面めっき方法及び内面めっき用補助極
JP3586420B2 (ja) * 2000-03-21 2004-11-10 株式会社杉浦製作所 袋状ワークのめっき方法及びめっきライン
DE10308731B4 (de) * 2003-02-28 2005-09-01 Contitech Luftfedersysteme Gmbh Verfahren und Vorrichtung zur galvanischen Beschichtung von Hohlkörpern

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CN104641023A (zh) 2015-05-20
ES2613873T3 (es) 2017-05-26
WO2014037229A3 (de) 2014-10-16
MX2015002837A (es) 2015-05-15
DE102012017493B3 (de) 2013-09-19
PT2893056T (pt) 2017-02-01
TW201422851A (zh) 2014-06-16
TWI585243B (zh) 2017-06-01
CN104641023B (zh) 2017-05-31
WO2014037229A2 (de) 2014-03-13
EP2893056A2 (de) 2015-07-15

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