EP1195453A2 - Dispositif d'un bain pour cylindre de machine à graver - Google Patents

Dispositif d'un bain pour cylindre de machine à graver Download PDF

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Publication number
EP1195453A2
EP1195453A2 EP01120089A EP01120089A EP1195453A2 EP 1195453 A2 EP1195453 A2 EP 1195453A2 EP 01120089 A EP01120089 A EP 01120089A EP 01120089 A EP01120089 A EP 01120089A EP 1195453 A2 EP1195453 A2 EP 1195453A2
Authority
EP
European Patent Office
Prior art keywords
cylinder
electrolyte
gravure cylinder
anode
metal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP01120089A
Other languages
German (de)
English (en)
Other versions
EP1195453A3 (fr
EP1195453B1 (fr
Inventor
Max Rid
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.)
Kaspar Walter GmbH and Co KG
Original Assignee
Kaspar Walter GmbH and Co KG
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 Kaspar Walter GmbH and Co KG filed Critical Kaspar Walter GmbH and Co KG
Publication of EP1195453A2 publication Critical patent/EP1195453A2/fr
Publication of EP1195453A3 publication Critical patent/EP1195453A3/fr
Application granted granted Critical
Publication of EP1195453B1 publication Critical patent/EP1195453B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • C25D7/04—Tubes; Rings; Hollow bodies

Definitions

  • the invention relates to a bath device according to the preamble of claim 1 for the galvanic coating of gravure cylinders with one Metal.
  • Gravure cylinders especially for illustration or packaging printing are galvanically coated with a metal coating as part of a print preparation stage, z. B. made of copper, into which the engraving is then introduced can be, which corresponds to the later printed image.
  • a metal coating as part of a print preparation stage, z. B. made of copper, into which the engraving is then introduced can be, which corresponds to the later printed image.
  • For the galvanic Appropriate baths are known for coating, which are sometimes very large and heavy gravure cylinders (up to 2,500 kg, 3,700 mm bale length, 1,530 mm circumference) can be used in a liquid electrolyte.
  • the Electrolyte will continue to be an anode, e.g. B. a copper wire sections or Titanium basket containing copper granules, used. Subsequent current flow the anode-side copper dissolves and strikes on the Surface of the rotogravure cylinder serving as the cathode, whereby the Desired galvanic coating
  • Fig. 4 shows an example of such a known fully immersed bath.
  • Gravure cylinder 1 is almost completely in an electrolyte liquid 2 in one Upper tub 3 immersed.
  • Below the upper trough 3 is a lower trough 4 arranged in which the electrolyte liquid for installing and removing the gravure cylinder 1 2 can be drained.
  • two anode baskets 5 are arranged in which copper wire sections are held are and which can be moved horizontally to the gravure cylinder 1.
  • an intaglio cylinder 1 is more than half immersed in electrolyte liquid 2.
  • anode baskets 6 are provided, which are essentially below of the gravure cylinder 1 are arranged and pulled up to the side a largely constant distance from the surface to be coated Gravure cylinder 1 must be observed.
  • the anode baskets 6 are with anode rails 7 connected and vertically movable together with them.
  • the fully immersed bath is advantageous because of the large immersion depth much current can be passed through the gravure cylinder, so the plating process expires quickly.
  • the specific cathodic current load i.e. H. the amount of electricity based on the area of the electrolyte immersed in the electrolyte Pressure cylinder, is not larger than in comparison to baths in which the gravure cylinder is not full, but z. B. is only half immersed. It it is obvious that the greater the immersion depth, the greater the amount of electricity can be transmitted, resulting in a proportional reduction in the Electroplating time leads.
  • a disadvantage of fully immersing bathrooms is that they can be installed and removed the gravure cylinder, the electrolyte from the upper trough into a usually lower sump located below must be drained because the operator the gravure cylinder held by the storage device in a crane device must transfer and do not come into contact with the electrolyte may.
  • the gravure cylinder is newly inserted, the electrolyte from the lower trough is restored pumped into the upper tub and accordingly flows through the Anode baskets.
  • the copper oxide layers are due to the flow effect detached the copper wire sections and get into the as dirt particles Electrolyte. When the power is switched on, these dirt particles build up the surface of the gravure cylinder to be coated and form nuclei, which can lead to a "spotty" copper precipitation.
  • a so-called is therefore usually used for the galvanization of gravure cylinders semi-submerged bath used in which the gravure cylinder independently maximum of about half of its size in the electrolyte liquid is immersed.
  • the anode basket containing the copper wire sections becomes delivered vertically from below.
  • the dimensions of the upper hull chosen so that the anode baskets in the upper trough moved down as far that the copper wire sections are still fully covered with electrolyte even if the gravure cylinder is in due to the discharge of electrolyte the lower trough is no longer immersed in the electrolyte.
  • the gravure cylinder can be installed and removed accordingly without the Copper anodes are exposed and can oxidize.
  • the semi-submerged bath therefore has the same as the fully submerged bath Advantage that the cleanliness in the upper tub due to much less copper oxidation is larger, resulting in a higher quality of the copper deposit the gravure cylinder can be reached. Conversely, there is opposite the immersing bathroom the disadvantage that due to the lower Immersion depth the electroplating speed is slower.
  • This semi-cylindrical shape of the anode basket has the consequence that the Anode basket extends far up in the vertical direction and thus when draining of the electrolyte for changing the copper wire sections in the Anode baskets are no longer completely covered by electrolyte. A corresponding The result would be contamination of the electrolyte by copper oxides.
  • Fig. 6 shows an example of a semi-submerged bath in which the gravure cylinder 1 about half immersed in the electrolyte liquid 2 in the upper tub 3 is.
  • Anode baskets 8 are arranged below the gravure cylinder 1, which can be moved vertically to a small extent together with anode rails 9.
  • the rotogravure cylinder 1 is held by a storage device which in the Essentially consists of two bearing bridges 10, of which only one in FIG. 6 is recognizable.
  • the bearing bridges 10 are on rails 11 with the aid of spindles 12 movable in the axial direction of the gravure cylinder 1, so that the two opposite bearing bridges 10 axially tension the gravure cylinder 1 can after the gravure cylinder 1 by means of a not shown Crane was lifted into the upper trough 3.
  • FIG. 6 is the way for the due to the bearing bracket 10 vertical travel of the anode rails 9 and the anode baskets 8 limited.
  • An increase in the vertical path could only be increased by Cross members 13 of the bearing brackets 10 and thus an increase in height of the entire bath device, which is due to the usual spatial limitations existing at the user, in particular due to the fact that a crane and gravure cylinder are located above the bath device must be movable, is not possible.
  • the anode baskets 8 arranged largely flat so that even after draining the electrolyte liquid 2 remain completely covered by electrolyte 2 in the lower trough 4.
  • An enlargement of the anode baskets 8 in the horizontal plane is possible, but due to the growing distance to the surface of the gravure cylinder no improvement in terms of greater amperage.
  • the invention has for its object a bath device for galvanic Coating of gravure cylinders with a metal to specify on the one hand a reduction in the galvanization time as with fully immersed ones Bathrooms, on the other hand a higher quality due to greater cleanliness of the semi-submerged baths can be reached.
  • the bath device combines the advantages of the previously known full diving and semi-diving baths. This is how the gravure cylinder becomes more than half immersed in the electrolyte, so that larger currents and a reduction in processing times is possible.
  • the im Metal holding device essentially forming the anode baskets during the Galvanization phase at least a third of the lateral surface of the gravure cylinder faces at a short distance, thus on the outer surface of the rotogravure cylinder is pulled up sideways and thus a vertical extension it remains in the cylinder change phase, i.e. when installing or removing of the rotogravure cylinder completely covered with electrolyte, as has been the case up to now was only the case with semi-submerged baths.
  • the bearing device has two bearing bridges, the only outside of the upper hull on a substantially parallel to an axial direction of the gravure cylinder extending wall, e.g. B. supported on a front wall of the upper trough are, but not on an opposite with respect to the upper trough Wall, e.g. B. the rear wall of the upper hull.
  • the bearing bridges in contrast to the z. B. explained in connection with FIG. 5 double-sided support, it is possible that half of the upper hull is not covered by the cross members of the associated bearing brackets.
  • the upper trough in its lower area is tapered. This makes it possible to change the volume of the To reduce the upper trough or the amount of electrolyte in the upper trough or to be kept constant even though the depth of the upper hull is increased. Because it is If the volume of the upper trough is too large, there is a risk that so much electrolyte from the lower tub arranged below the upper tub until it is reached an overflow in the upper tub is pumped into the upper tub that the Pump runs dry.
  • the volume of the lower hull is not arbitrary enlargeable, since an increase in their height corresponds to the total height of the Bath fixture would impact, which is not for the reasons mentioned above is desirable while increasing the width of the underpan Transportability of the bath device, especially when transporting trucks severely restricted. It should be noted that the bathroom fixtures of the State of the art the limit values with regard to length and width for one Have already fully exhausted transport with reasonable effort. A further enlargement of the bath device and in particular the length and The width of the lower trough is therefore not desirable.
  • the outer wall adapts the upper hull essentially the required space of Anode baskets and rotogravure cylinders, so that despite the greater upper trough depth there is no or only a slight increase in the upper trough volume.
  • FIGS. 1 and 2 show a bath device according to the invention in different Process states, namely on the one hand at the time of a cylinder change (Fig. 1) when an intaglio cylinder 21 just by means of a not shown Crane inserted into the bath device and through to a storage facility associated bearing brackets 22 is held and in a galvanization phase (Fig. 2). Since the components in FIGS. 1 and 2 essentially are identical, they are identified by the same reference numerals.
  • the bath device has an upper trough 23 and a lower one Under pan 24 on. Located in the upper tub 23 and in the lower tub 24 there is a liquid electrolyte 25 which is pumped out of the lower tub 24 is pumped into the upper tub 23 and at least one vertically two positions movable overflow 27 back into the lower pan 24th flows. Alternatively, it is also possible to open two mutually open overflows to arrange different heights.
  • anode basket 29 In the upper tub 23 there is also a vertically movable anode device arranged, which consists essentially of an anode rail 28 and one with the Anode rail 28 electrically and mechanically coupled and as a metal holding device serving anode basket 29 there.
  • the anode basket 29 can also consist of several composite anode baskets or grids.
  • the anode basket 29 is made of titanium and with copper wire sections or copper granules filled as metal elements 29a. When current is applied the copper decomposes so that copper ions pass through the electrolyte 25 migrate to the surface of the gravure cylinder 21 connected as cathode and settle there in the form of a copper coating.
  • An exact description of the anode basket 29 takes place later with reference to FIG. 3.
  • FIGS. 1 and 2 Only one of the bearing bridges 22 is shown in FIGS. 1 and 2.
  • the two Bearing bridges 22 are on rails 30a, 30b in the axial direction of the gravure cylinder 21 by means of spindles or other suitable adjustment mechanisms movable so that they clamp the gravure cylinder 21 between them and keep it rotatable.
  • the bearing bridges 22 are only one-sided, namely supported on the front of the upper trough 23. Accordingly two sets of rails 30a, 30b are required to absorb the moment.
  • the one-sided bearing remains Bearing bridges 22 about half of the upper trough 23 freely accessible at the top, see above that there extending parallel to the axial direction of the gravure cylinder 21
  • Anode rail 28 is freely vertically movable.
  • the vertical movement of the Anode rail 28 with the anode basket 29 is also known, so that a further description and presentation is not required.
  • the degree of filling of the electrolyte 25 in the upper tub 23, i. that is, the height level of the electrolyte 25, can be adjusted using the vertically movable overflow 27 adjust between a height level 31 in the cylinder change phase and a level 32 in the electroplating phase.
  • Fig. 2 shows the bath device in the electroplating phase, in which the gravure cylinder 21 is almost completely submerged.
  • the anode basket 29 is pulled up laterally, so that it is compared to the known one semi-submerged bath forms an approximately 50% larger basket surface.
  • the anode bar 28 is connected to the Move the anode basket 29 down into the upper trough 23, as shown in FIG. 1.
  • the overflow 27 is lowered so that the electrolyte 25 flows down to the level 31 in the lower trough 24.
  • the upper tub 23 tapers in the lower area.
  • the taper can e.g. B. with additional help used sheets 33 or by appropriate adjustment of the walls of the Upper tub done. It is also possible to use blocks or boxes to displace volume. Limiting or reducing the volume the upper trough 23 has the advantage that the lower trough 24 does not become excessive much electrolyte 25 has to be pumped up. Accordingly there is no risk that the lower trough 24 is completely emptied and the Pump 26 runs dry.
  • Fig. 3 shows the anode basket 29, the anode rail 28 and one with the anode rail 28 connected anode brackets 34 in relation to the gravure cylinder 21st
  • the anode bracket 34 is connected to the anode bar 28 and provides one Bracket for the anode basket 29.
  • the anode basket 29 consists of a titanium mesh material and takes the Metal elements 29a as copper wire sections or copper granules.
  • the anode basket 29 rests on the anode bracket 34. Its underside becomes complete formed by the mesh material, with partitions in certain sections 35 are pulled up, the excessively slipping of the otherwise loose overlying metal elements 29a, d. H. prevent the copper granulate.
  • Two steep sections 36 of the anode basket 29 additionally have on their top Covers 37 to prevent the loose metal elements 29a can fall out of the basket.
  • the covers 37 are permeable, so that the copper ions can pass through it. Even the covers 37 and the partition walls 35 are made of titanium material. Otherwise, especially in the flat sections, the top of the anode basket 29 is free accessible.
  • the design of the anode basket 29 enables the anode basket 29 largely adapt to the shape of the gravure cylinder 21 and its sides have risen sharply.
  • the side climb is stronger than one Angle of repose of the metal elements 29a to be held on the anode basket 29.
  • On Falling out of the metal elements 29a - in particular from the steep sections 36 can only be prevented by the covers 37.

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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)
EP20010120089 2000-10-04 2001-08-21 Dispositif d'un bain pour cylindre de machine à graver Expired - Lifetime EP1195453B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10049113 2000-10-04
DE2000149113 DE10049113C2 (de) 2000-10-04 2000-10-04 Badvorrichtung für Tiefdruckzylinder

Publications (3)

Publication Number Publication Date
EP1195453A2 true EP1195453A2 (fr) 2002-04-10
EP1195453A3 EP1195453A3 (fr) 2004-09-08
EP1195453B1 EP1195453B1 (fr) 2005-12-07

Family

ID=7658636

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20010120089 Expired - Lifetime EP1195453B1 (fr) 2000-10-04 2001-08-21 Dispositif d'un bain pour cylindre de machine à graver

Country Status (2)

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EP (1) EP1195453B1 (fr)
DE (2) DE10049113C2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015055537A1 (fr) * 2013-10-17 2015-04-23 Damm Oberflächentechnik Gmbh & Co. Kg Procédé et dispositif permettant de revêtir des étriers d'appuie-tête ou des tiges d'appuie-tête

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2309643A1 (de) * 1972-03-17 1973-09-27 Belgium Safan Verfahren zum elektrolytischen beschichten eines zylindrischen gegenstandes, vorrichtung zur durchfuehrung dieses verfahrens und nach ihm erhaltener gegenstand
DE2722857A1 (de) * 1977-04-27 1978-11-02 Graphicart Int Vorrichtung zur auftragung einer metallischen schicht durch elektrolyse auf einen zylindrischen koerper, insbesondere zur aufkupferung eines zylinders
DE3107101A1 (de) * 1981-02-20 1982-09-09 Schering Ag, 1000 Berlin Und 4619 Bergkamen Vorrichtung und verfahren zur galvanischen metallabscheidung auf gegenstaenden, deren reinigung von anhaftenden oberflaechenbehandlungsmitteln sowie deren rueckgewinnung
CH639431A5 (en) * 1979-05-14 1983-11-15 Graphicart Int Device for copper-plating bodies of rotation which are equipped with two journals, especially intaglio cylinders
DE4113361A1 (de) * 1990-04-26 1991-10-31 Daetwyler Ag Anlage zum galvanischen behandeln von drehkoerpern, insbesondere druckzylindern
DE4402437A1 (de) * 1993-02-01 1994-08-04 Quad Tech Galvanisiervorrichtung
EP0882817A2 (fr) * 1997-05-12 1998-12-09 Hubert F. Metzger Dispositif et procédé d'électroplacage d'un cylindre de rotogravure utilisant l'énergie ultrasonore

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3325316A1 (de) * 1983-07-13 1985-01-31 Maschinenfabrik Kaspar Walter GmbH & Co KG, 8000 München Verfahren und vorrichtung zum metallbeschichten, insbesondere zum verkupfern von zylindrischen koerpern

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2309643A1 (de) * 1972-03-17 1973-09-27 Belgium Safan Verfahren zum elektrolytischen beschichten eines zylindrischen gegenstandes, vorrichtung zur durchfuehrung dieses verfahrens und nach ihm erhaltener gegenstand
DE2722857A1 (de) * 1977-04-27 1978-11-02 Graphicart Int Vorrichtung zur auftragung einer metallischen schicht durch elektrolyse auf einen zylindrischen koerper, insbesondere zur aufkupferung eines zylinders
CH639431A5 (en) * 1979-05-14 1983-11-15 Graphicart Int Device for copper-plating bodies of rotation which are equipped with two journals, especially intaglio cylinders
DE3107101A1 (de) * 1981-02-20 1982-09-09 Schering Ag, 1000 Berlin Und 4619 Bergkamen Vorrichtung und verfahren zur galvanischen metallabscheidung auf gegenstaenden, deren reinigung von anhaftenden oberflaechenbehandlungsmitteln sowie deren rueckgewinnung
DE4113361A1 (de) * 1990-04-26 1991-10-31 Daetwyler Ag Anlage zum galvanischen behandeln von drehkoerpern, insbesondere druckzylindern
DE4402437A1 (de) * 1993-02-01 1994-08-04 Quad Tech Galvanisiervorrichtung
EP0882817A2 (fr) * 1997-05-12 1998-12-09 Hubert F. Metzger Dispositif et procédé d'électroplacage d'un cylindre de rotogravure utilisant l'énergie ultrasonore

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015055537A1 (fr) * 2013-10-17 2015-04-23 Damm Oberflächentechnik Gmbh & Co. Kg Procédé et dispositif permettant de revêtir des étriers d'appuie-tête ou des tiges d'appuie-tête

Also Published As

Publication number Publication date
DE10049113A1 (de) 2002-06-06
DE50108292D1 (de) 2006-01-12
EP1195453A3 (fr) 2004-09-08
EP1195453B1 (fr) 2005-12-07
DE10049113C2 (de) 2003-01-02

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