EP0445120A1 - Vorrichtung zum auf- und/oder abtragen von überzügen bei werkstücken. - Google Patents
Vorrichtung zum auf- und/oder abtragen von überzügen bei werkstücken.Info
- Publication number
- EP0445120A1 EP0445120A1 EP89910421A EP89910421A EP0445120A1 EP 0445120 A1 EP0445120 A1 EP 0445120A1 EP 89910421 A EP89910421 A EP 89910421A EP 89910421 A EP89910421 A EP 89910421A EP 0445120 A1 EP0445120 A1 EP 0445120A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- container
- workpieces
- anode
- cprocess
- space
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D21/00—Processes for servicing or operating cells for electrolytic coating
-
- 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
- C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
- C25F5/00—Electrolytic stripping of metallic layers or coatings
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
- C25F7/00—Constructional parts, or assemblies thereof, of cells for electrolytic removal of material from objects; Servicing or operating
-
- 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
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S204/00—Chemistry: electrical and wave energy
- Y10S204/13—Purification and treatment of electroplating baths and plating wastes
Definitions
- the invention relates to a device for applying and / or removing coatings on workpieces with a conveying device and a container (process space) receiving the workpieces with an incoming line that can be connected to at least one medium source and an outgoing line that connects the container to the medium source. wherein the connection between the lines and the medium source takes place by means of at least one control device.
- Devices of this type are e.g. described in DE-OS 26 19 987.
- the media are fed into the container (process space) from the side, while several multi-way valves are used to control the medium flow.
- the result of this is that several depots are formed in the circuits, so that media which are incompatible with one another can mix.
- Another disadvantage, with which the known device is afflicted is that if it is used for the production of coatings which can be produced electrolytically, the coatings are removed and removed slowly.
- Another device is described in DE 26 60 711 C2. These are devices for the electrochemical treatment of surfaces in the absence of air. Several lines, valves and a pressure medium reservoir (protective gas) are required to fill or empty the container holding the workpieces.
- E RSA TZBLATT The disadvantage of this known device is that special measures must be taken to ensure operation that does not pollute the environment. If, for example, a leak occurs in one of the containers or one of the lines, the liquid in this container or this line escapes into the open in an uncontrolled manner. Since the most varied and very aggressive chemicals are regularly used in such devices, these devices are usually arranged in special rooms or containers to prevent the escaping liquids or gases from polluting the environment. This makes the whole device expensive.
- the invention has for its object to further develop the generic device without undue design effort so that it " works without a deposit and can be used in particular for incompatible liquids.
- control device can be connected to at least three different media l len and is arranged below the container (process space) and in that the conveying device is switched in the outgoing line of the container (process space).
- the invention is at least achieved when the circulation of the liquid, i.e. their movement
- E RS ATZBLATT from the medium sources to the container (process space) and from there back to the medium sources, expediently by means of negative pressure, so that there may be an implosion in the lines or the containers if leaks cannot be excluded. In this case, the medium never escapes to the outside, rather it flows back alone and completely back into the associated medium container. During operation there are also no significant interruptions in operation, since the switchover can take place very quickly. Thus, one continuous cycle is replaced by the other continuous cycle, and in an extremely short time.
- a particularly expedient measure of the invention provides that the conveying device is arranged above the medium sources.
- the invention takes advantage of the fact that all the lines and the control device, e.g. Radial or axial slides can be emptied without leaving any residue if there is no pressure in them and they are connected to the assigned medium containers to carry the medium.
- a further expedient embodiment of the invention provides that at least one opening for a holder carrying at least one workpiece is formed in the wall of the container (process space). It is particularly expedient here if the holder has an elastically deformable sealing section which is in pressure connection with the wall. In the context of this inventive concept, it is particularly advantageous if the casing of the opening is frustoconical and if it tapers inwards.
- E RSA TZBLATT Such a device can be used and used in particular in the medical and here in the dental field.
- the container (process room) consists of a material that is resistant to the media. Since there is negative pressure in the container (process space), the plugs need not have any threads; it is rather sufficient if they are inserted into the openings after they have been fitted with the workpieces. Due to the negative pressure, a force is exerted on the stoppers in the interior of the container, thereby preventing them from detaching from the container.
- the solenoid valve l (V) which is located between the conveyor and the container (process room) and is used for ventilation, then pressure equalization occurs, so that the liquid from the container (process room) and the lines flow into the responsible medium container can, and that completely.
- the opening of the venti les to the outside takes place regularly shortly before the end of an operation with a certain liquid. After that, when the valve is closed again, new and different liquid flows into the container (process space). After completing the entire work process, the plugs can be removed from the openings.
- the entire wall it is also possible to design the entire wall as a plate which can be detachably connected to the container (process space), which is equipped with the plugs and workpieces and then connected to the container (process space).
- REPLACEMENT LEAF Workpieces are designed as cathodes or anodes if an anode or cathode is arranged opposite the workpieces and if an electrolyte flows between the electrodes. In order to ensure that the inflowing liquid also rinses the workpieces sufficiently, it is expedient if a device influencing the flow direction of the liquid is arranged within the container (process space).
- the device consists of two at a distance from the floor or ceiling of the container (Process room) arranged plates, which cover the floor or the ceiling except for a gap or slot in the wall area of the wall carrying the workpieces. This ensures that the inflowing liquid flows along the inside of the wall carrying the workpieces and optimally rinses the workpieces.
- an ion exchanger for regeneration of the rinse water is arranged in the pre-rinse and the rinse water tank. It is particularly expedient here if two ion exchangers are arranged in each container.
- Such an ion exchanger can consist of a hollow body which can be detachably connected to the inlet or outlet opening of the container and has an inlet and an outlet opening, means for receiving ions being arranged between these openings.
- REPLACEMENT LEAF can be removed and replaced with new ones. The operator of the device does not come into contact with any liquid.
- the invention also relates to a method for applying and / or removing coatings on workpieces by means of a device according to the above measures.
- the procedure is such that the workpieces are arranged in the interior of the container (process space), that the workpieces are then, if necessary, pretreated so that the control device is actuated so that the container (process space) flows through an electrolyte or another chemical liquid and that after formation of a certain coating layer, the control device connects the lines to a rinsing liquid, which is then transported through the container (process chamber).
- FIG. 3 shows a container for a medium source, shown enlarged
- Fig. 5 shows a spatial arrangement of an anode with respect to a workpiece
- REPLACEMENT LEAF 6 shows a further container for a media source.
- FIG. 1 shows a device for applying and / or removing coatings on workpieces 10 and 12 r ⁇ i '.
- a the workpieces 10 and 12 holding container (process room) 14 with an incoming, at least.:; e ne medium source 18 connectable and an outgoing, the container CProcess chamber 14 with the medium source.
- 18, 19 and 21 connectable lines 16 and 20 are shown, the connection between the lines 16 and 20 and the medium sources 18, 19 and 21 being carried out by means of a control device 24, here a radial slide valve.
- the control device 24 is a valve which consists of two circular disks 1 and 2, which can be rotated relative to one another about a common axis, and which is arranged on the one hand below the container (process chamber) 14 and on the other hand above the medium sources 18, 19 and 21 is, the lines 18 and 20 are essentially vertical so that no depots are formed in them.
- the radial slide 24 allows the lines 16 and 20 to be connected to more than two containers 18, 19 and 21.
- a vacuum delivery device 26 is connected in the outgoing line 20, in the present exemplary embodiment a vacuum pump.
- the liquid is therefore e.g. conveyed from the container 18 into the line 16 and from there into the container C process room) 14. Since there is negative pressure in the container (process chamber) 14, the liquid flows via the line 20 into the radial slide valve 24 and from there back into the container 18.
- Fig. 1 also shows that in the wall 28 of the container (CProcess) 14 two openings 30 and 32 for the
- REPLACEMENT LEAF Workpieces 10 and 12 supporting brackets 40 and 42 are formed.
- the brackets 40 and 42 have an elastically deformable sealing section which is connected to the wall 28 in pressure.
- the cladding of the openings 30 and 32 is frustoconical and tapers inwards. If the device shown in FIG. 1 is to be used for producing electrolytically producible coatings on metallic bodies, then the surface of the section of the workpieces 10 and 12 protruding into the interior of the container CProcess space) is designed as a cathode or anode , while an anode 44 or cathode is arranged opposite workpieces 10 and 12. The liquid flows between these electrodes.
- a device 50 and 52 influencing the direction of flow of the liquid 46 is arranged within the container CProcess space 14.
- the incoming line 16 is connected in the bottom area, which can preferably be funnel-shaped, and the outgoing line 20 is connected in the top area of the container (process room 14).
- the device 50 and 52 influencing the liquid flow consists of two plates which are arranged at a distance from the floor 54 or from the ceiling 56 of the container (process room) 14 and which cover the floor 54 or the ceiling 56 apart from a gap 60 and 62 in the wall area of each Cover workpieces 10 and 12 bearing wall 28.
- Fig. 1 also shows a valve CV), which is connected in the line 20 and between the conveyor 26 and the container CProcess space).
- the valve CV designed as a solenoid valve for ventilation is always then
- REPLACEMENT LEAF actuated when the container (process space) 14 is emptied and the medium located there is to get into the responsible medium container 18, 19 and 21. In this case, a pressure equalization takes place in the container (process space) 14, so that the liquid can flow down via the line 16. The conveyor 26 does not have to be switched off.
- FIG. 2 shows that the workpieces 10 and 12 can be acted upon by the inflowing electrolyte also by means of a mixing device, propeller 3, arranged inside the container (process space) 14.
- FIG. 3 shows particularly well that two ion exchangers 64 and 66 are arranged in the rinsing water container 19 for the regeneration of the rinsing water.
- the ion exchangers 64 and 66 each consist of a hollow body detachably connectable to the inlet or outlet opening 70 or 72 of the container (process space) 14 with an inlet and an outlet opening 74, 78 or 76 and 80. Between these openings are means 82, here resin, arranged to receive ions.
- an ion-containing liquid e.g. Water
- a hollow body 90 of the ion exchanger 66 This higher Izylindri see hollow body 90 has a plurality of radially aligned openings 91 and 92.
- the liquid flowing out of the hollow body 90 is pressed by the ion receiving means 82 and reaches through the opening 76 into the interior of the container (process space) 14.
- the liquid flowing out of the opening 76 into the interior is essentially free of cathions or anions. From there, the liquid passes through d. ⁇ - opening 78 in the
- REPLACEMENT LEAF Interior of the second ion exchanger 64 which is constructed essentially in the same way as the first ion exchanger 66, but which catches cathions or anions. The liquid flowing out of line 7 is thus freed of ions. If the ion exchangers 64 and 66 are inoperable, they are removed from the container 14 and replaced by others.
- the wall 28 of the container 14 can also be formed as a raw li ngmagazi n.
- the particular advantage of the invention is therefore that not only large systems such as pipes with a length of several meters can be coated in the same way, but also small objects such as screws, rings or dentures.
- the electrolyte can e.g. be mixed with nitrogen.
- the electrolyte can e.g. can be swirled by stirring or ultrasound. It has proven to be particularly expedient to use insoluble anodes or electrodes here. It is also ensured that no evaporation losses of the liquids occur.
- the distance between the anode and the cathode (workpieces) has a decisive influence on the thickness of the coating layer.
- the thickness depends on the current density and the exposure time. Because of the different currents at the edges, recesses and indentations in the workpieces, the layer thickness is not quite uniform. This results from the fact that the recesses are at a greater distance from the anode than the end face of the workpiece facing the anode.
- REPLACEMENT LEAF Remedy can be achieved in part by removing the anode from the workpieces to such an extent that the depth of the recesses is negligibly small with respect to the distance of the anode from the cathode.
- this has the disadvantage that the container must be built significantly larger on a regular basis.
- Anode 104 and the workpieces 10 and 12 is relatively small.
- the anode 104 is accommodated in a receptacle 100, whose distance from the workpiece 10 is significantly less than the length of the field lines 110 and 111 between the anode 104 and the cathode 10.
- the receptacle 100 whose distance from the workpiece 10 is significantly less than the length of the field lines 110 and 111 between the anode 104 and the cathode 10.
- This is a stretched body, the open side 120 of which communicates with the container (process space) 14. Between the open side 120 and the anode
- baffles 106 and 107 are arranged.
- Baffles 106 and 107 are designed as guide plates, so that the field lines 110 and 111 are serpentine and serpentine. This increases the length of the field lines from the anode 104 to the workpiece 10 - so that the bottom side 116, which is an amount x further away from the anode, is approximately as far away from the anode as the face 115 of
- apertures 108 and 109 are also provided, by means of which it is to be achieved that the streamlines 110 and 111 leave the outlet 120 with approximately the same density.
- anode 104 is surrounded by granular particles 121, which may consist of copper, nickel, gold, silver, chromium or the like.
- the particles 121 are accommodated in a collecting container 102 which communicates with the receiving container 100.
- the receptacle 100 and the collecting container 102 are formed in one piece and are essentially L-shaped, the lower end of the collecting container 102 surrounding the anode.
- Galvanic coatings are produced by electrolytic decomposition of metal salt solutions.
- a copper plating on the metal article 10 can be made by hanging the article as a cathode in a copper sulfate solution and using an anode consisting of a circuit board as an anode, which is surrounded by copper particles, for example granules, small spheres, etc.
- the Cu ++ ions go to the negatively charged object and form the coating there, while the residual acid ions SO4 release new Cu ++ ions from the Cu anode, so that the concentration of the solution is maintained.
- the current density must be kept sufficiently low, otherwise the Cu coating becomes porous and spongy.
- the result of the granules is that the distance of the anode 104 from the workpiece 10 is kept constant, since the used granules arranged in the bottom area of the anode 104 can be replaced by new granules which extend to the cover 103.
- FIG. 6 shows a container 200 which corresponds approximately to the media container 19 according to FIG. 1. The main difference between the container 200 and the
- REPLACEMENT LEAF Med um container 19 is that the entire container 200 is designed as an ion exchanger, which can be connected through connections 212 and 214 to the lines 16 and 20 via the radial slide 24.
- the container (ion exchanger) 200 has three filters 202, 204 and 206, which are arranged ion receiving means for cations 208 and anions 210, for example in Fo of resin. This ion exchanger 200 can be operated in both directions.
Landscapes
- 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)
- Coating Apparatus (AREA)
- Removal Of Insulation Or Armoring From Wires Or Cables (AREA)
Description
Claims
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3839755 | 1988-11-24 | ||
DE3839755 | 1988-11-24 | ||
DE19893903696 DE3903696A1 (de) | 1989-02-08 | 1989-02-08 | Vorrichtung zum auf- und/oder abtragen von ueberzuegen bei werkstuecken |
DE3903696 | 1989-02-08 | ||
PCT/DE1989/000600 WO1990005801A1 (de) | 1988-11-24 | 1989-09-22 | Vorrichtung zum auf- und/oder abtragen von überzügen bei werkstücken |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0445120A1 true EP0445120A1 (de) | 1991-09-11 |
EP0445120B1 EP0445120B1 (de) | 1995-09-13 |
Family
ID=25874515
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP89910421A Expired - Lifetime EP0445120B1 (de) | 1988-11-24 | 1989-09-22 | Vorrichtung zum auf- und/oder abtragen von überzügen bei werkstücken |
Country Status (6)
Country | Link |
---|---|
US (1) | US5173161A (de) |
EP (1) | EP0445120B1 (de) |
JP (1) | JPH03505348A (de) |
AT (1) | ATE127865T1 (de) |
DE (1) | DE58909438D1 (de) |
WO (1) | WO1990005801A1 (de) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE69533245D1 (de) * | 1994-03-25 | 2004-08-19 | Nec Electronics Corp | Vorrichtung zur elektrolytischen Behandlung |
US5750014A (en) * | 1995-02-09 | 1998-05-12 | International Hardcoat, Inc. | Apparatus for selectively coating metal parts |
US6126808A (en) * | 1998-03-23 | 2000-10-03 | Pioneer Metal Finishing | Method and apparatus for anodizing objects |
DE10004740C1 (de) * | 2000-01-28 | 2001-06-28 | Siemens Ag | Verfahren und Vorrichtung zum Bearbeiten von kleinteiligen Werkstücken durch Auf- und/oder Abtragen von Schichten mittels einer Behandlungsflüssigkeit |
SE0001369L (sv) * | 2000-04-13 | 2001-10-14 | Obducat Ab | Förfarande vid samt apparat för bearbetning av substrat |
DE10107674C2 (de) * | 2001-02-19 | 2003-04-30 | Fraunhofer Ges Forschung | Gekapselter, mehrstufiger Prozeßreaktor in der Galvanotechnik |
US20030122292A1 (en) * | 2001-10-09 | 2003-07-03 | Michael Waring | Chemical processing system |
US20110284385A1 (en) | 2010-05-21 | 2011-11-24 | Pioneer Metal Finishing | Method and Apparatus For Anodizing Objects |
DE102011110086A1 (de) | 2010-08-20 | 2012-02-23 | Gramm Technik Gmbh | Vorrichtung und Verfahren zur Herstellung galvanischer Überzüge |
DE102012107393A1 (de) | 2011-08-12 | 2013-02-14 | Gramm Technik Gmbh | Vorrichtung und Verfahren zur Herstellung galvanischer Überzüge |
DE102013112302A1 (de) | 2013-11-08 | 2015-05-13 | Gramm Technik Gmbh | Vorrichtung zur Herstellung galvanischer Überzüge |
ES2816180T3 (es) | 2018-02-26 | 2021-03-31 | Cockerill Maintenance & Ingenierie Sa | Instalación y método de tratamiento superficial localizado para piezas industriales |
EP3569742A1 (de) * | 2018-05-15 | 2019-11-20 | Gramm Technik GmbH | Hochgeschwindigkeitsbeschichtungsvorrichtung und verfahren |
EP3805433A1 (de) * | 2019-10-08 | 2021-04-14 | Gramm Technik GmbH | Hochgeschwindigkeitsbeschichtungsvorrichtung und verfahren |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1034447B (de) * | 1955-04-09 | 1958-07-17 | Benteler Werke Ag | Einrichtung fuer die gleichzeitige elektrolytische Behandlung der Innen- und Aussenwandungen mehrerer metallischer Hohlkoerper grosser Laenge, insbesondere von Rohren |
NL244636A (de) * | 1958-12-19 | |||
US3640331A (en) * | 1966-10-18 | 1972-02-08 | Aisaburo Yagishita | Heating and concentrating tower for plating waste recovery unit |
DE1816141A1 (de) * | 1968-12-20 | 1970-06-25 | Gottlieb Guehrung Fa | Verfahren zum Festlegen von stabfoermigen Teilen in bezug auf eine Halteplatte |
US3658470A (en) * | 1969-06-16 | 1972-04-25 | Industrial Filter Pump Mfg Co | Metal ion recovery system |
FI53841C (fi) * | 1975-05-07 | 1978-08-10 | Teuvo Tapio Korpi | Elektrolytisk ytbelaeggningsanordning |
CH613880A5 (de) * | 1975-09-29 | 1979-10-31 | Emile Steiger | |
CH623499A5 (de) * | 1976-07-13 | 1981-06-15 | Nii Avtom Upravlenia I Proizv | |
FR2398124A1 (fr) * | 1977-07-20 | 1979-02-16 | Neiman Sa | Procede et dispositif de traitement electrolytique |
US4337134A (en) * | 1980-02-27 | 1982-06-29 | Elfab Corporation | Continuous truck mounted printed circuit board plating system |
JPS57145999A (en) * | 1981-03-03 | 1982-09-09 | Yamaha Motor Co Ltd | Plating device |
JPS57198298A (en) * | 1981-05-29 | 1982-12-04 | Nippon Steel Corp | Production of electroplated steel plate |
JPS609893A (ja) * | 1983-06-29 | 1985-01-18 | Sumitomo Metal Ind Ltd | 長尺管の局部的自動めっき装置 |
DE3576370D1 (de) * | 1985-01-17 | 1990-04-12 | Alusuisse | Vorrichtung zum galvanischen abscheiden einer dispersionsschicht. |
-
1989
- 1989-09-22 WO PCT/DE1989/000600 patent/WO1990005801A1/de active IP Right Grant
- 1989-09-22 US US07/700,130 patent/US5173161A/en not_active Expired - Fee Related
- 1989-09-22 DE DE58909438T patent/DE58909438D1/de not_active Expired - Lifetime
- 1989-09-22 EP EP89910421A patent/EP0445120B1/de not_active Expired - Lifetime
- 1989-09-22 JP JP1509737A patent/JPH03505348A/ja active Pending
- 1989-09-22 AT AT89910421T patent/ATE127865T1/de not_active IP Right Cessation
Non-Patent Citations (1)
Title |
---|
See references of WO9005801A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE58909438D1 (de) | 1995-10-19 |
ATE127865T1 (de) | 1995-09-15 |
WO1990005801A1 (de) | 1990-05-31 |
US5173161A (en) | 1992-12-22 |
JPH03505348A (ja) | 1991-11-21 |
EP0445120B1 (de) | 1995-09-13 |
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