EP1606436B1 - Dispositif et partie de ce dispositif pour la formation par depot galvanique de pieces faconnees dentaires - Google Patents

Dispositif et partie de ce dispositif pour la formation par depot galvanique de pieces faconnees dentaires Download PDF

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Publication number
EP1606436B1
EP1606436B1 EP04722179A EP04722179A EP1606436B1 EP 1606436 B1 EP1606436 B1 EP 1606436B1 EP 04722179 A EP04722179 A EP 04722179A EP 04722179 A EP04722179 A EP 04722179A EP 1606436 B1 EP1606436 B1 EP 1606436B1
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EP
European Patent Office
Prior art keywords
electrode
connecting means
magnetic connecting
magnet
current
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.)
Expired - Lifetime
Application number
EP04722179A
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German (de)
English (en)
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EP1606436A1 (fr
Inventor
Alexander SCHRÖCK
Ralf Hornung
Jürgen Laubersheimer
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.)
Wieland Dental and Technik GmbH and Co KG
Original Assignee
Wieland Dental and Technik GmbH and Co KG
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Publication of EP1606436A1 publication Critical patent/EP1606436A1/fr
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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
    • 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
    • C25D17/10—Electrodes, e.g. composition, counter electrode
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49567—Dental appliance making

Definitions

  • the invention relates to a device and an electrode for the electrodeposition, in particular for the electrodeposition of dental moldings such as frameworks for crowns, inlays, bridges and the like.
  • the galvanic deposition, d. H. the deposition under current flow, metallic layers has been known for a long time. If moldings are formed, that is, stable bodies in themselves, this is called electroforming.
  • Galvanically deposited gold layers have a much higher hardness than cast ones, which is between 60-80 HV or between 100-130 HV, depending on the electrolyte composition.
  • These electroplated gold layers are generally free of voids, inhomogeneities and impurities that are unavoidable during casting. Nevertheless, it may be due to improper work and thereby introduced impurities or due to manufacturer-specific device-related process fluctuations to separation problems. These show up z.
  • impurities, bud formation, layering or holes in the layer By plating impurities, bud formation, layering or holes in the layer. Such disturbances can in the worst case lead to the loss of burning stability and thus render the resulting layers / shaped bodies unsuitable for further dental processing.
  • These devices can usually be placed and operated on a simple workbench, usually with a usable volume of electrolyte about a liter or less, and a capacity of a few dental prostheses, e.g. B. Kronenhimppchen that can be produced therein in a process.
  • the contacting is also to be seen.
  • "Galvanisier réelle” is an electrolyte (eg. As the AGC ® gold bath of the applicant), an anode, and (at least) one provided with a conductive silver duplicate model of a tooth or the oral situation, which is connected as the cathode.
  • the duplicate model is connected to the current / voltage source in the device via a holding rod / wire, which usually acts as an electrical contact at the same time.
  • This support rod may be a stainless steel rod or, for example, a copper / titanium rod, and may be simple or reusable.
  • the contact rods / support rods are then connected via a plug contact (eg a socket), through a metallic collet or a crimp contact with the current / voltage source in the device. It is also important for contact with the device that it has a long life and, if it is inside the galvanizing cell, that it is not susceptible to corrosion. Corrosion products can contaminate the electrolyte and endanger the entire function of the process. The preparation of the contact, so the equipment of the device with duplicate models and the electrical contact is made by the operator.
  • EP-A-0690151 a special electrode for hard chrome plating is shown, which consists essentially of an electrically conductive, hollow component carrier, which is provided for contacting a plurality of components to be coated. Inside the component carrier is provided over the entire length of the carrier extending dust-shaped magnet.
  • the invention therefore has the task of avoiding the problems encountered in the prior art in the contacting or at least largely rule out.
  • Models should be easily connectable to the power / voltage source, and this connection should be reliably maintained throughout the process time. Furthermore, the electrical contact should also be able to be interrupted again in a simple manner in order to be able to introduce new parts / models into the electroplating apparatus.
  • the device according to the invention has at least one current / voltage source and electrodes which can be arranged in a vessel which can be filled with an electrolyte. At least one magnetic connection means is provided between at least one electrode and the current / voltage source for producing the electrical contact for the electrodeposition.
  • the essence of the invention is based on the fact that a magnetic contact for the preparation of the electrical contact between the electrode and the current / voltage source is provided.
  • the magnetic adhesive force of two standing under electrical voltage magnetic metal parts causes, that an electric circuit is closed by the corresponding contact of these parts.
  • the inventively provided magnetic connecting means is formed in two parts.
  • such a two-part design of a Magnet as the first part and a second part made of a magnetizable metal.
  • the two-part magnetic connection means consists of two magnets which establish the necessary contact by their attraction. When using two magnets, a particularly good holding force and minimal contact resistance are achieved.
  • the magnets mentioned are preferably so-called permanent magnets or permanent magnets, as known from the prior art. These provide the required holding force on the magnetizable metal or on each other without the use of other tools. Furthermore, the magnets used preferably have a circular cross-section. Such magnets can be referred to as round magnets.
  • a magnet is assigned to the current / voltage source.
  • the invention is realized in conjunction with the electroplating devices mentioned above, such devices often have a so-called head or cover part, which is arranged when carrying out the electrodeposition over the vessel which receives the electrolyte.
  • the magnet associated with the current / voltage source is preferably arranged on this head or cover part. In this way, the contact with the electrodes can then be produced particularly easily.
  • the mentioned embodiments in particular at the current / voltage source, preferably at the head or cover part, there is a sleeve which receives the magnet. Such a particularly preferred embodiment will be explained later in connection with the drawing.
  • a magnet is assigned to the electrode or a part of the electrode.
  • the magnet is preferably attached to these rod-shaped components.
  • the invention also includes a new electrode for the electrodeposition of dental moldings.
  • This electrode according to the invention is designed so that it has at least one magnetic connection means, in particular at least part of a two-part magnetic connection means.
  • This electrode has the shape of a rod, as it basically corresponds to the shape of the previously known contact bars / support rods.
  • the magnetic connection means or its part is provided at one end of the electrode. This is usually the end that is associated with the galvanic deposition after making the electrical contact of the current / voltage source.
  • the magnetic connection means may be a magnetizable metal, which then interacts with a magnet which is associated with the current / voltage source.
  • the magnetic connection means on the electrode is a magnet as already described above.
  • a magnet is preferably a permanent or permanent magnet. Magnets with a round cross section (round magnets) are preferred.
  • the magnet is in a sleeve-like receptacle at one end of the (preferably rod-like) electrode.
  • this recording is preferably closed with a lid part.
  • This cover part is preferably flat. In this case, the upper side of the cover forms the contact surface which cooperates with the other part of the magnetic connection means assigned to the current / voltage source.
  • the electrode itself can basically be constructed of any conductive material. However, it is preferred if the electrode and also an optional cover part for closing the receptacle receiving the magnet is made of stainless steel. This material offers good protection against corrosion. If appropriate, the entire outer surface of the electrode, or preferably at least the upper surface of the cover part forming the contact surface, may be coated with another metal. Such a metal coating may serve to further increase corrosion resistance or electrical conductivity. Emphasizing here are coatings of gold or gold alloys, which can preferably be deposited galvanically on the electrode or only on the cover part.
  • the electrode according to the invention preferably has a smaller cross-section at its "lower” end, which carries the parts / models to be coated during the electrodeposition, than at its "upper" end facing the current / voltage source or the head or cover part.
  • the electrode tapers at its "lower” end or runs there pointedly. In this way, the parts / models to be coated easier to attach to the same time serving as a holding electrode electrode.
  • the electrode according to the invention is characterized in that it is provided on its outer surfaces with an electrically non-conductive coating, wherein the intended for contact with the current / voltage source surface and the end of the electrode without magnetic connection means are free of such a coating.
  • the coating may in particular be a plastic coating.
  • the coating in particular plastic coating, prevents galvanic deposition of metal there and / or that the electrode is attacked by corrosion and damaged.
  • the device according to the invention or the electrode according to the invention have a whole series of advantages over those with the previously known contacts.
  • the required electrical contact is made by a directional magnetic force. This is strong enough to maintain this contact throughout the galvanic deposition process. If the aforementioned embodiments with two cooperating parts of the magnetic connection means, in particular the two magnets mentioned, used, this advantage is particularly evident. By the directed magnetic force, the two cooperating parts are inevitably pulled into the correct position to each other, so that the two parts, in particular the two magnets, opaque one above the other. In this way it is ensured that there is always a defined contact surface and a bad Galvanisierieri by undefined high contact resistance is virtually eliminated.
  • a further advantage of the invention is that the electrical contact can be made quickly and easily by the operator.
  • the electrode / the contact bar is easily replaceable, which significantly increases the working efficiency for the operator.
  • no maintenance of the components is necessary because, for example, contamination of the contact surfaces is largely excluded. Should a cleaning be necessary, it can be done simply by wiping.
  • Yet another advantage of the embodiments according to the invention is shown by taking into account the process temperatures of conventional galvanic deposits, in particular in the dental field.
  • Such process temperatures are usually in the range between 50 ° C and 70 ° C, usually at about 65 ° C.
  • condensation products usually collect from the electrolyte in the upper part of the vessel or the galvanizing cell. Due to their chemical composition, such condensation products can lead to corrosion of the parts which make the electrical contact. The products resulting from the corrosion can then in turn enter the electrolyte and contaminate it.
  • Such impurities can then be co-deposited, for example, together with the gold, and thus greatly deteriorate the quality of the electrodeposited molded parts, in particular the denture scaffolds. By contacting the invention caused by this can be almost certainly excluded.
  • This relates in particular to the embodiments in which the magnets are located in a sleeve-like component, which is securely closed with a cover part.
  • the advantages according to the invention are particularly apparent.
  • the magnet is completely protected by this jacket construction.
  • a corrosion-resistant stainless steel is preferably used as the material for such constructions. Corrosion of the electrical contact is therefore excluded. Bringing on the stainless steel electrode / stainless steel rod, at least on the contact surfaces such as the lid part, in addition to a gold layer, this corrosion resistance is on the one hand further increased, and on the other hand, an excellent electrical conductivity is achieved. This, together with the other design features, becomes an outstanding permanent and reproducible good electrical transition at the contact points between electrode / support rod and power / voltage source or head or cover part created.
  • the electrode according to the invention or the holding / contact rod according to the invention is permanently reusable. This is especially true because it additionally on its surface with a protective layer, preferably a non-conductive protective layer such. B. a plastic coated.
  • the device essentially consists of a housing that contains the current / voltage source and picks up the control.
  • the device has an electrolyte container with a head or lid part, to which the anode and the cathode, which is provided with the part to be coated / model to be attached.
  • the AGC® Speed device of the applicant the complete electrolyte container with head or cover part can be removed from the device. This simplifies the introduction of the parts / models to be coated in the electrolyte container and protects the other components of the device from contamination, for example by the electrolyte.
  • FIG. 1 shows an electrode 1 according to the invention in the manner of a holding or contact rod.
  • This electrode 1 is made of stainless steel and has at its one end 2 a smaller cross-sectional area than at its other end 3.
  • the end 2 is formed in the manner of a tip, which for fixing the electrode to an in FIG. 1 not shown part or model is used, which is to be electroplated. This will be explained in more detail below.
  • a sleeve-like receptacle / recess 4 is provided, in which a magnet 5 is introduced.
  • This magnet 5 is a permanent magnet with a round cross-sectional area, i. H. a so-called round magnet.
  • a cover part 6 is provided on the electrode 1, which is also made of stainless steel and the receptacle 4 seals.
  • the surface 7 present on the outside of the cover part 6 forms the contact surface, via which the magnet 5 can cooperate as a part of the two-part magnetic connection means with a second part.
  • the surface 7 or possibly also the entire outer surface of the electrode 1 may be gold-plated. This is in FIG. 1 not shown in detail.
  • the outer surfaces of the electrode 1, except for the surface 7 serving as the contact surface may be provided with a plastic coating. This then prevents that takes place on the electrode itself unwanted galvanic deposition. If the plastic coating is not present, this deposition is prevented by the operator by other measures, for example by wrapping the electrode 1 with a shrink tube.
  • FIG. 2 shows a sleeve-like member 11 with a round cross section, which is also made of stainless steel.
  • This component 11 is the counterpart of serving as a holding / contact rod electrode 1 from FIG. 1 .
  • the component 11 may be introduced, for example in the above-explained head or cover part of the AGC ® speed device of the applicant or be otherwise associated with the current / voltage source, in another construction of a Galvanisier réelles.
  • the component 11 has at its one end 12 a receptacle / recess 13, in which a magnet 14 is introduced.
  • the magnet 14 is a permanent magnet with a round cross-section, d. H. a round magnet.
  • the receptacle 13 with the round magnet 14 is sealed with a lid part 15, which is also made of stainless steel. In this way, it is also prevented here that the magnet 14 is corroded by rising vapors from the electrolyte.
  • the existing on the cover part 15 outer surface 16 is in the component 11, the contact surface for the interaction of the magnet 14 with the other part of the two-part magnetic connection means.
  • the surface 16 and optionally the entire outer surface of the component 11 may be gold plated.
  • Corresponding plastic coatings are also possible.
  • example 1 Die material kind Plaster die; Repair kit Metallic primary crown; Repair kit MagnetAuthierung Contact in the device Magnet in stainless steel sleeve Magnet in stainless steel sleeve; gilded Contact staff Magnetic contact rod, E-steel sleeve; shrinkable tubing Magnetic contact rod, stainless steel sleeve; gold plated; shrinkable tubing Electric contact Magnet / stainless steel / stainless steel / magnet Magnet / stainless steel / gold / gold / stainless steel / magnet Galvanisierparameter Time 1.5 h 4h Average current density 2.5 A / dm 2 2 A / dm 2 current form pulse current pulse current temperature 65 ° C 65 ° C Galvanisier réelle kind AGC Speed AGC Speed description In the plaster die a 1.2 mm thick hole is drilled and glued the magnetic contact rod with its thin uninsulated side with superglue.
  • the surface to be plated is coated with conductive silver and a connection drawn from the surface to the rod.
  • the prepared part is placed on the magnetic mating contact in the placement head and this is introduced into the galvanizing cell.
  • the galvanizing cell is placed in the apparatus and the process is started.
  • the primary crown is filled with plastic and the magnetic contact rod with its thin uninsulated side embedded in the plastic.
  • the surface to be plated is coated with conductive silver and a connection drawn from the surface to the rod.
  • the prepared part is placed on the magnetic mating contact in the placement head and this is introduced into the galvanizing cell.
  • the galvanizing cell is placed in the apparatus and the process is started. Result
  • the Galvanokrone meets all quality requirements. Handling is extremely easy, safe and fast.
  • the Galvanokrone meets all quality requirements. Handling is extremely easy, safe and fast.

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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)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
  • Dental Preparations (AREA)

Claims (13)

  1. Dispositif de dépôt galvanique de pièces dentaires moulées, par exemple d'ossatures pour couronnes, inlays, bridges et similaires, qui présente au moins une source de courant et/ou de tension et des électrodes qui peuvent être disposées dans un récipient apte à être rempli d'électrolyte, et dans lequel
    - au moins un moyen magnétique de liaison constitué de deux parties (5; 14) qui coopèrent mutuellement par une force magnétique est prévu pour établir un contact électrique pour le dépôt galvanique entre au moins une électrode (1) et la source de tension et/ou de courant,
    - une partie (14) du moyen magnétique de liaison est associée à la source de courant et/ou de tension et une partie (5) du moyen magnétique de liaison est associée à une extrémité (3) d'une électrode (1) en barreau,
    - l'extrémité (2) de l'électrode (1) en barreau est prévue sans moyen magnétique de liaison pour être reliée à au moins une partie ou un modèle à revêtir et
    - l'électrode (1) est dotée à sa surface extérieure d'un revêtement électriquement non conducteur, la surface (7) prévue pour assurer le contact avec la source de courant et/ou de tension et l'extrémité (2) de l'électrode sans moyen magnétique de liaison étant exempte d'un tel revêtement.
  2. Dispositif selon la revendication 1, caractérisé en ce que la partie (5) du moyen magnétique de liaison est disposée dans l'électrode (1) dans un logement (4) en forme de douille.
  3. Dispositif selon la revendication 1 ou la revendication 2, caractérisé en ce que le moyen magnétique de liaison est constitué de deux aimants (5; 14).
  4. Dispositif selon la revendication 1 ou la revendication 2, caractérisé en ce que le moyen magnétique de liaison est constitué d'un aimant et d'une partie en métal magnétisable.
  5. Dispositif selon la revendication 3 ou la revendication 4, caractérisé en ce que la section transversale de l'aimant a une surface circulaire.
  6. Dispositif selon l'une des revendications précédentes, caractérisé en ce que la partie (14) du moyen magnétique de liaison associée à la source de courant et/ou de tension, en particulier l'aimant, est associée à une partie de tête ou de couvercle qui, lors du dépôt galvanique, est située au-dessus du récipient apte à être rempli d'électrolyte et sur laquelle les électrodes sont de préférence également disposées.
  7. Dispositif selon l'une des revendications précédentes, caractérisé en ce que l'aimant (14) est disposé dans un composant (11) en forme de douille.
  8. Electrode (1) pour le dépôt galvanique de pièces dentaires moulées telles que des ossatures de couronnes, inlays, bridges et similaires,
    caractérisée en ce que
    elle a la forme d'un barreau et une partie (5) d'un moyen magnétique de liaison en deux pièces est associée à une de ses extrémités (3),
    en ce que son extrémité (2) est prévue sans moyen magnétique de liaison pour être reliée à au moins une pièce ou un modèle à revêtir et
    en ce qu'elle est dotée à sa surface extérieure d'un revêtement électriquement non conducteur, la surface (7) prévue pour assurer le contact avec la source de courant et/ou de tension et l'extrémité de l'électrode sans moyen magnétique de liaison étant exempte d'un tel revêtement.
  9. Electrode selon la revendication 8, caractérisée en ce que l'extrémité (3) qui présente un moyen magnétique de liaison est l'extrémité associée à une source de courant et/ou de tension lors du dépôt galvanique.
  10. Electrode selon la revendication 8 ou la revendication 9, caractérisée en ce que la partie (5) du moyen magnétique de liaison est un aimant (5).
  11. Electrode selon la revendication 10, caractérisée en ce que l'aimant (5) est disposé dans un logement (4) en forme de douille ménagé dans l'électrode (1), ce logement pouvant être de préférence refermé par une partie (6) en couvercle.
  12. Electrode selon l'une des revendications 8 à 11, caractérisée en ce que l'extrémité (2) de l'électrode (1) sans moyen magnétique de liaison a une section transversale de superficie plus petite que l'extrémité (3) de l'électrode (1) dotée d'un moyen magnétique de liaison, l'extrémité sans moyen magnétique de liaison se rétrécissant de préférence, en cône ou en pointe.
  13. Electrode selon l'une des revendications 8 à 12, caractérisée en ce que le revêtement électriquement non conducteur est un revêtement en matière synthétique.
EP04722179A 2003-03-24 2004-03-20 Dispositif et partie de ce dispositif pour la formation par depot galvanique de pieces faconnees dentaires Expired - Lifetime EP1606436B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10313818 2003-03-24
DE10313818A DE10313818A1 (de) 2003-03-24 2003-03-24 Vorrichtung und deren Teile für die galvanische Abscheidung von dentalen Formteilen
PCT/EP2004/002955 WO2004085714A1 (fr) 2003-03-24 2004-03-20 Dispositif et partie de ce dispositif pour la formation par depot galvanique de pieces faconnees dentaires

Publications (2)

Publication Number Publication Date
EP1606436A1 EP1606436A1 (fr) 2005-12-21
EP1606436B1 true EP1606436B1 (fr) 2010-09-08

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EP04722179A Expired - Lifetime EP1606436B1 (fr) 2003-03-24 2004-03-20 Dispositif et partie de ce dispositif pour la formation par depot galvanique de pieces faconnees dentaires

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Country Link
US (1) US20060131162A1 (fr)
EP (1) EP1606436B1 (fr)
JP (1) JP2006521465A (fr)
CN (1) CN1791704A (fr)
AT (1) ATE480649T1 (fr)
CA (1) CA2519519A1 (fr)
DE (2) DE10313818A1 (fr)
WO (1) WO2004085714A1 (fr)

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KR102190642B1 (ko) * 2018-12-26 2020-12-14 주식회사 에스에프에이 고온 증착 소스

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Publication number Publication date
ATE480649T1 (de) 2010-09-15
DE10313818A1 (de) 2004-10-07
CN1791704A (zh) 2006-06-21
CA2519519A1 (fr) 2004-10-07
EP1606436A1 (fr) 2005-12-21
JP2006521465A (ja) 2006-09-21
WO2004085714A8 (fr) 2006-01-26
US20060131162A1 (en) 2006-06-22
DE502004011639D1 (de) 2010-10-21
WO2004085714A1 (fr) 2004-10-07

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