EP0070011B1 - Dispositif de galvanisation - Google Patents

Dispositif de galvanisation Download PDF

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Publication number
EP0070011B1
EP0070011B1 EP82106169A EP82106169A EP0070011B1 EP 0070011 B1 EP0070011 B1 EP 0070011B1 EP 82106169 A EP82106169 A EP 82106169A EP 82106169 A EP82106169 A EP 82106169A EP 0070011 B1 EP0070011 B1 EP 0070011B1
Authority
EP
European Patent Office
Prior art keywords
drum
liquid
station
electrolyte
partition wall
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
Application number
EP82106169A
Other languages
German (de)
English (en)
Other versions
EP0070011A1 (fr
Inventor
Hans De Vries
Siegfried Dr. Birkle
Klaus Stöger
Johann Gehring
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.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to AT82106169T priority Critical patent/ATE11433T1/de
Publication of EP0070011A1 publication Critical patent/EP0070011A1/fr
Application granted granted Critical
Publication of EP0070011B1 publication Critical patent/EP0070011B1/fr
Expired legal-status Critical Current

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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
    • C25D17/16—Apparatus for electrolytic coating of small objects in bulk
    • C25D17/18—Apparatus for electrolytic coating of small objects in bulk having closed containers
    • C25D17/20—Horizontal barrels

Definitions

  • the invention relates to a device for the electrolytic deposition of metals on objects, consisting of a galvanizing trough, in which an electrolyte is located during operation, a drum arranged in this galvanizing trough and connected to the one pole of a voltage source, in which the galvanizing objects are in operation, as well as an anode, which is connected to the other pole of the voltage source.
  • Such a device is already known, in particular for the electroplating of small objects.
  • the fully lockable drum is filled with a batch of the items to be electroplated, then placed in the electrolyte bath and rotated for a predetermined time.
  • Such devices are unsuitable for carrying out a continuous electroplating process. They are also unsuitable when it comes to the electrodeposition of metal from an oxygen-free and water-free electrolyte, an atmosphere of inert gas preferably having to be maintained over the electrolyte during the entire process.
  • a device is now known from German Patent 25 37 256, in which a galvanizing trough with an annular electrolyte trough is used, the annular inner wall of which is closed by a disk-shaped wall part above the electrolyte, while on the outer wall, which extends to a higher level, a closing cover is attached.
  • a contacting device is provided between the disk-shaped wall part and the cover, which has a series of support arms which are connected at their inner end to the axis of rotation of a drive mechanism. The other ends of the support arms, which protrude above the electrolyte in the annular trough, serve as a base for hanging goods racks to which the objects to be galvanized must be attached.
  • These goods racks are first placed in a lock chamber which is arranged above the lid of the electrolyte trough and which can be filled with an inert gas. From there, the goods racks are lowered through a lockable door into the electroplating trough and hung on one of the support arms. The removal of the goods racks is done in reverse order.
  • This known device is only suitable for the electroplating of objects that can be attached to racks.
  • This device is uneconomical for the electroplating of small objects with large quantities, such as bolts, nuts, screws, spacer bushings and the like, because the clamping of such objects would be very labor intensive and therefore very expensive.
  • the present invention has for its object to provide a device with which it is possible to galvanize even small objects in a continuous process without these having to be clamped.
  • the drum is designed as a cylinder rotatable about its longitudinal axis with open ends and in that the drum with guide means for moving the objects to be galvanized through the drum from an entrance station provided with transport means one open end to a transport station at the other open end of the drum.
  • the objects to be electroplated are then brought into one open end of the rotatable drum by the transport means mentioned in the entry station.
  • the guide means in the drum Through the guide means in the drum, the objects are gradually conveyed to the other open end of the drum, where the transport means present there ensure the delivery of the galvanized objects to the outside of the facility.
  • the electroplating trough is designed to be gas-tightly lockable, an inert gas being insertable above the electrolyte and the entrance station and the exit station contain liquid locks.
  • both the entrance station and the exit station are each provided with a partition projecting above the level of the electrolyte between the electroplating trough in which the drum is located and the liquid locks of the entrance station and the exit station, the Liquid locks of the entrance station and the exit station are filled with liquid up to a level below the edge of the partition and are provided with a further partition extending from the upper housing part down into the liquid.
  • the device consists of an elongated electroplating trough 1, which at one end by an entrance station 2 arranged mainly transversely to the longitudinal direction of this electroplating trough 1 and at the other end also by an also mainly transversely to the longitudinal direction the electroplating tub 1 arranged output station 3 is completed.
  • the electroplating trough 1 and the input and output stations 2 and 3 are arranged on a foundation 9, which is indicated schematically in the figures.
  • an elongated drum 4 which is rotatably mounted on a number of pairs of rollers 5, 6, 7 and 8.
  • each of these pairs of rollers is provided with 2 wheels or rollers 5a and 5b, which are fastened at some distance from one another in the electroplating trough.
  • the corresponding rollers 5a, 6a, 7a and 8a like the corresponding rollers 5b, 6b, 7b and 8b, are aligned with one another in such a way that drum 4 provided with a number of reinforcing and guide rings 10 to 13 on these pairs of rollers 5 to 8 is rotatably mounted.
  • the drum 4 is provided with guide means 15 in the form of ribs which are spirally attached to the inner surface and extend over this inner surface. When the drum 4 rotates, these ribs ensure that the small objects to be electroplated in the drum 4 are gradually conveyed from the entry station 2 to the exit station 3.
  • the input station 2 contains a liquid lock which directly adjoins the electroplating trough 1. Its housing 20 runs perpendicular to the longitudinal direction of the electroplating trough 1, as shown in FIG. 2.
  • a partition 21 is attached in the housing 20 of the input station 2, the upper edge 22 of which extends over the level 23 of the electrolyte 16 in the electroplating trough 1. The space on the other side of the partition 21 is to form a liquid lock up to the edge 22 of the partition 21 with liquid 17, for. B. toluene filled.
  • a further partition wall 24 extends from the upper housing part 28 of the input station 2 into this liquid 17. As shown in FIG.
  • an insertion funnel 29 is located to the left of this further partition wall 24, through which the objects to be galvanized can be introduced into the input station 2 .
  • the partition wall 24 extending into the liquid 17 ensures that the space above the liquid 17 and above the electrolyte 16 in the electroplating trough 1, in which there is an inert gas, is closed off from the outside world, so that on the one hand via the input station 2 no inert gas can escape and on the other hand no oxygen can enter this space.
  • the objects to be electroplated are fed to the introduction funnel 29 shown schematically in FIG.
  • the articles are gradually conveyed from the input station 2 to the output station 3 by the rib-shaped guide means 15 during the rotation of the drum 4.
  • the output station 3 like the input station 2, consists of a self-contained housing 30 which connects to the electroplating trough 1. As FIG. 3 shows in more detail, there is also a partition 31 in the housing 30 of the starting station 3, the upper edge 32 of which protrudes above the level 23 of the electrolyte 17 in the electroplating trough 1.
  • the exit station 3 also contains a liquid lock.
  • this partition 31 which is filled with liquid 18, e.g. B. toluene is filled.
  • a further partition wall 34 extends from the upper housing part 19 of the exit station 3 into this liquid 18.
  • This further partition wall 34 has the same function as the further partition wall 24 in the entrance station 2.
  • the galvanized objects emerging from the drum 4 are via a funnel-shaped outlet 35 directed in the direction of the lower end of a conveyor belt 36, the other end of which is led out of the electrolyte and extends up to or past the edge 32 of the partition 31.
  • the galvanized objects transported out of the electrolyte 16 via this conveyor belt 36 are removed from the adhering electrolyte by means of a series of. Before they leave this conveyor belt 36 Spray nozzles 37, with which a liquid (for example toluene) is sprayed, which preferably itself forms part of the electrolyte, are cleaned.
  • a liquid for example toluene
  • the cleaned objects pass via a funnel-shaped component 38 to a part of another conveyor belt 39 immersed in the liquid 18, the other end of which ends on the other side of the further partition 34 of the liquid lock above this liquid 18 and up to Exit opening runs in the exit station 3, which in the present case is a funnel-shaped nozzle 40.
  • an elongated anode 50 is located centrally in the drum 4, the ends of which are supported in an insulating manner.
  • the drum 4 is made of perforated material, and there are further curved plate-shaped anodes 51, 52 and 53 on the outside of the drum 4.
  • These curved plate-shaped anodes 51, 52 and 53 preferably extend at an angle a (see Fig. 2), which is chosen so that these plate-shaped anodes are very close during the electroplating process in the vicinity of the objects to be electroplated because of the rotation of the drum 4 slightly creeping up the drum wall.
  • the device described above is particularly suitable for the galvanic deposition of aluminum from an oxygen-free and water-free aluminum-organic electrolyte. However, it is easy to see that the device according to the invention can also be used for the deposition of other metals from a corresponding electrolyte.
  • the device according to the invention can be used for all galvanic processes in which the access of oxygen must be avoided during the process, for example because the electrolyte is thereby deteriorated or because vapors are released during the electroplating process which can form an undesired connection with oxygen.
  • the invention is not limited to the embodiment of the device described above, but that various modifications and changes can be made without departing from the scope of the invention.
  • the hopper with metering shaker channel at the entrance to the entrance station can be replaced by another type of transport mechanism, for example by a conveyor belt or a screw conveyor or the like lie, which leads to a different form of space in which the system must be accommodated.
  • the guide means in the drum can also be designed as a loose blade, which are arranged relative to one another so that when the drum rotates, the parts to be treated move in the axial direction.
  • liquid locks in the entrance and exit station instead of the liquid locks in the entrance and exit station, other locks, e.g. B. gas locks can be used.
  • a liquid which is compatible with the electrolyte, for example toluene, is preferably used for the liquid locks.

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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)
  • Manufacturing Of Magnetic Record Carriers (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Surgical Instruments (AREA)
  • Glass Compositions (AREA)
  • Electrolytic Production Of Metals (AREA)
  • Secondary Cells (AREA)
  • Analysing Materials By The Use Of Radiation (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Encapsulation Of And Coatings For Semiconductor Or Solid State Devices (AREA)
  • Mechanical Treatment Of Semiconductor (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)

Claims (17)

1. Dispositif pour le dépôt électrolytique de métaux sur des objets, constitué d'une cuve de galvanisation dans laquelle se trouve un électrolyte pendant le fonctionnement, un tambour disposé dans cette cuve de galvanisation, relié à une borne d'une source de tension et dans lequel les objets à galvaniser se trouvent pendant le fonctionnement, ainsi qu'une anode qui est reliée à l'autre borne de la source de tension, caractérisé en ce que le tambour (4) est agencé en un cylindre tournant autour de son axe longitudinal et à extrémités ouvertes, et en ce que le tambour (4) est muni de moyens de guidage (15) pour faire passer les objets à galvaniser dans le tambour (4) d'un poste d'entrée (2) muni de moyens de transport (26) à l'extrémité ouverte, à un poste de sortie (3) muni de moyens de transport (36, 39) à l'autre extrémité ouverte du tambour (4).
2. Dispositif suivant la revendication 1, caractérisé en ce que la cuve de galvanisation (1) est agencée de manière à pouvoir être fermée de façon étanche aux gaz, pour le dépôt galvanique de l'aluminium, à partir d'un électrolyte organo- aluminique, anhydre et exempt d'oxygène, un gaz inerte pouvant être introduit dans la cuve, au-dessus de l'électrolyte (16), et en ce que le poste d'entrée (2) et le poste de sortie (3) contiennent des sas à liquide.
3. Dispositif suivant la revendication 2, caractérisé en ce que, aussi bien le poste d'entrée (2) que le poste de sortie (3) sont munis, respectivement, d'une cloison de séparation (21 et 31) dépassant le niveau (23) de l'électrolyte (16), entre la cuve de galvanisation (1) dans laquelle se trouve le tambour (4) et les sas à liquide du poste d'entrée (2) et du poste de sortie (3), les sas à liquide du poste d'entrée (2) et du poste de sortie (3) étant emplis de liquide (17 et 18) jusqu'à un niveau (23) situé endessous du bord (22 à 32) de la cloison de séparation (21 à 31) et étant munis d'une autre cloison de séparation (24 à 34) s'étendant vers le bas jusque dans le liquide (17 et 18), à partir de la partie supérieure formant enveloppe (28 et 19).
4. Dispositif suivant l'une des revendications 1 à 3, caractérisé en ce que fait partie des moyens de transport du poste d'entrée (2) une bande transporteuse (26) qui est disposée de manière à ce que l'une de ses extrémités s'étende dans le liquide (17) sur l'un des côtés d'une autre cloison de séparation (24), et de manière à ce que l'autre extrémité sorte au-dessus du liquide (17) du sas à liquide de l'autre côté de la cloison de séparation (24), et s'étende jusqu'au bord (22) de la cloison de séparation (21).
5. Dispositif suivant la revendication 4, caractérisé en ce que les objets à galvaniseur peuvent être transportés par un distributeur de dosage à secousses (25), et en passant par une ouverture d'entrée du poste d'entrée (2), jusqu'au-dessus de l'extrémité de la bande transporteuse (26).
6. Dispositif suivant la revendication 4 ou 5, caractérisé en ce que l'autre extrémité de la bande transporteuse (26) se termine au-dessus d'une trémie dont l'extrémité inférieure s'étend dans l'une des extrémités du tambour (4).
7. Dispositif suivant l'une des revendications 1 à 6, caractérisé en ce que fait partie des moyens de transport du poste de sortie (3) une bande transporteuse (39) qui est disposée de manière à ce que l'une de ses extrémités se trouve dans le liquide, sur l'un des côtés de l'autre cloison de séparation (34), et que son autre extrémité se trouve au-dessus du liquide du sas à liquide, de l'autre côté de l'autre cloison de séparation (34) et s'étende jusqu'à l'ouverture de sortie du poste de sortie (3).
8. Dispositif suivant l'une des revendications 1 à 7, caractérisé en ce que les objets à galvaniser peuvent être transportés de l'autre extrémité du tambour (4) au sas à liquide du poste de sortie (3), par une autre bande transporteuse (36) dont l'une des extrémités s'étend dans l'électrolyte (16) jusqu'en-dessous de l'extrémité concernée du tambour (4), tandis que son autre extrémité s'étend de l'autre côté de la cloison de séparation (31) jusqu'au-dessus du liquide (18) du sas à liquide du poste de sortie (3).
9. Dispositif suivant la revendication 8, caractérisé en ce qu'entre l'extrémité de l'autre bande transporteuse (36) faisant saillie au-dessus du liquide (18) et l'extrémité de la bande transporteuse (39) faisant saillie dans le liquide (18) se trouve un élément constitutif en forme de trémie (38).
10. Dispositif suivant la revendication 9, caractérisé en ce que, dans le poste de sortie (3) sont fixées, au-dessus de la bande transporteuse (36) et de la cuve de galvanisation (1), des buses de projection (37) pour chasser l'électrolyte des objets galvanisés.
11. Dispositif suivant l'une des revendications 1 à 10, caractérisé en ce que les bandes transporteuses (26, 36 et 39) s'étendent suivant une direction perpendiculaire à l'axe longitudinal du tambour (4).
12. Dispositif suivant l'une des revendications 1 à 11, caractérisé en ce que les moyens de guidage (15) sont constitués d'une ou de plusieurs nervures en saillie disposées en forme hélicoidales sur la paroi intérieure du tambour (4).
13. Dispositif suivant l'une des revendications 1 à 12, caractérisé en ce qu'une anode (50) est disposée dans le tambour (4).
14. Dispositif suivant l'une des revendications 1 à 13, caractérisé en ce que le tambour (4) est fabriqué en un matériau perforé.
15. Dispositif suivant la revendication 14, caractérisé en ce que d'autres anodes (51 à 53), de préférence sous forme de plaques, sont disposées parallèlement au tambour (4) et en-dehors de celui-ci dans la cuve de galvanisation (1).
16. Dispositif suivant l'une des revendications 1 à 15, caractérisé en ce que le tambour (4) est en matière plastique et en ce que la liaison électrique avec les objets à galvaniser s'effectue, notamment, par des éléments de contact disposés sur la paroi intérieure du tambour (4).
17. Dispositif suivant la revendication 16, en se référant à la revendication 12, caractérisé en ce que la nervure ou les nervures ménagées en forme hélicoidales sur la paroi intérieure du tambour (4) servent en même temps d'éléments de contact.
EP82106169A 1981-07-10 1982-07-09 Dispositif de galvanisation Expired EP0070011B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82106169T ATE11433T1 (de) 1981-07-10 1982-07-09 Galvanisiereinrichtung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813127390 DE3127390A1 (de) 1981-07-10 1981-07-10 Galvanisiereinrichtung
DE3127390 1981-07-10

Publications (2)

Publication Number Publication Date
EP0070011A1 EP0070011A1 (fr) 1983-01-19
EP0070011B1 true EP0070011B1 (fr) 1985-01-23

Family

ID=6136663

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82106169A Expired EP0070011B1 (fr) 1981-07-10 1982-07-09 Dispositif de galvanisation

Country Status (13)

Country Link
US (1) US4427518A (fr)
EP (1) EP0070011B1 (fr)
JP (1) JPS5819495A (fr)
AT (1) ATE11433T1 (fr)
CA (1) CA1184531A (fr)
CS (1) CS236675B2 (fr)
DD (1) DD202462A5 (fr)
DE (2) DE3127390A1 (fr)
DK (1) DK157622C (fr)
FI (1) FI70602C (fr)
HU (1) HU183995B (fr)
NO (1) NO158756C (fr)
SU (1) SU1192629A3 (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3150545A1 (de) * 1981-07-10 1983-06-30 Siemens AG, 1000 Berlin und 8000 München Verfahren zum betreiben einer galvanisiereinrichtung
US4559122A (en) * 1983-11-07 1985-12-17 Luciano Folco Continuous-cycle electroplating plant
US4701248A (en) * 1985-07-09 1987-10-20 Siemens Aktiengesellschaft Apparatus for electrolytic surface treatment of bulk goods
US4670120A (en) * 1985-07-09 1987-06-02 Siemens Aktiengesellschaft Apparatus for electrolytic surface treatment of bulk goods
US4803811A (en) * 1985-07-09 1989-02-14 Siemens Aktiengesellschaft Lapping device for surface enhancement of bulk material
US4668367A (en) * 1985-07-09 1987-05-26 Siemens Aktiengesellschaft Lock for loading and unloading goods into a treatment apparatus having a protective atmosphere
US4876801A (en) * 1987-04-16 1989-10-31 Siemens Aktiengesellschaft Method and means for drying bulk goods
DE3836256A1 (de) * 1988-10-25 1990-04-26 Schering Ag Vorrichtung zum galvanisieren oder chemischen behandeln von metallischen teilen
US5608186A (en) * 1992-01-27 1997-03-04 Thomas & Betts Corporation Ground rod
DE19907863C1 (de) * 1999-02-23 2000-03-16 Doerken Ewald Ag Vorrichtung zur Elektrotauchlackierung
DE10011865C1 (de) * 2000-03-10 2001-06-07 Wilms Gmbh Einrichtung zur Beschichtung von Gegenständen, insbesondere Galvanisierung von Kleinteilen
TW557233B (en) * 2001-09-15 2003-10-11 Alois Muller Machine for treating bulk materials of industrial volume parts, and treatment plant for treating bulk materials of industrial volume parts in liquids
DE20122882U1 (de) 2001-09-15 2009-02-19 Müller, Alois Horizontalmaschine

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3941674A (en) * 1974-05-31 1976-03-02 Monroe Belgium N.V. Plating rack
US4062751A (en) * 1976-06-28 1977-12-13 Trw Inc. Electroplating drum for relatively large fasteners and the like
US4105526A (en) * 1977-04-28 1978-08-08 Imperial Industries, Inc. Processing barrel with stationary u-shaped hanger arm and collar bearing assemblies

Also Published As

Publication number Publication date
JPS5819495A (ja) 1983-02-04
DE3127390A1 (de) 1983-02-10
DK309482A (da) 1983-01-11
EP0070011A1 (fr) 1983-01-19
NO821788L (no) 1983-01-11
DE3262046D1 (en) 1985-03-07
FI822457A0 (fi) 1982-07-09
NO158756B (no) 1988-07-18
SU1192629A3 (ru) 1985-11-15
CA1184531A (fr) 1985-03-26
DD202462A5 (de) 1983-09-14
US4427518A (en) 1984-01-24
DK157622B (da) 1990-01-29
FI70602C (fi) 1986-09-24
FI70602B (fi) 1986-06-06
ATE11433T1 (de) 1985-02-15
FI822457L (fi) 1983-01-11
NO158756C (no) 1988-10-26
JPH0249400B2 (fr) 1990-10-30
HU183995B (en) 1984-06-28
CS236675B2 (en) 1985-05-15
DK157622C (da) 1990-06-18

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