WO2012043513A1 - シリンダ用メッキ装置 - Google Patents
シリンダ用メッキ装置 Download PDFInfo
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- WO2012043513A1 WO2012043513A1 PCT/JP2011/071960 JP2011071960W WO2012043513A1 WO 2012043513 A1 WO2012043513 A1 WO 2012043513A1 JP 2011071960 W JP2011071960 W JP 2011071960W WO 2012043513 A1 WO2012043513 A1 WO 2012043513A1
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- Prior art keywords
- cylinder
- plating
- cooling medium
- flow path
- chuck means
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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
- C25D21/00—Processes for servicing or operating cells for electrolytic coating
- C25D21/02—Heating or cooling
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D17/00—Constructional parts, or assemblies thereof, of cells for electrolytic coating
- C25D17/005—Contacting devices
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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
- C25D17/06—Suspending or supporting devices for articles to be coated
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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
- C25D17/06—Suspending or supporting devices for articles to be coated
- C25D17/08—Supporting racks, i.e. not for suspending
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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
- C25D17/10—Electrodes, e.g. composition, counter electrode
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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
- C25D7/00—Electroplating characterised by the article coated
- C25D7/04—Tubes; Rings; Hollow bodies
Definitions
- the present invention relates to plating using an insoluble electrode as a plate material for forming a plate surface on the outer peripheral surface of a long cylinder, for example, a hollow cylindrical gravure cylinder (also called a plate-making roll) used for gravure printing, such as copper plating or chromium plating.
- the cooling means is provided in the chuck means for gripping the cylinder, and the cylinder, particularly the cylinder end portion and the cylinder gripping portion of the chuck means are cooled during the plating process.
- the present invention relates to a cylinder plating apparatus that makes uniform the plating process on the outer peripheral surface of the cylinder by eliminating heat accumulation at the cylinder end and the cylinder gripping portion of the chuck means.
- a fine concave portion (cell) corresponding to plate making information is formed on a gravure cylinder to produce a plate surface, and the cell is filled with ink and transferred to a printing material.
- a general gravure cylinder uses a cylindrical iron core or aluminum core (hollow roll) as a base material, and forms a plurality of layers such as a base layer and a release layer on the outer peripheral surface of the base material, and a printing plate on the surface.
- a copper plating layer (plate material) for forming is formed. Then, a cell corresponding to the plate making information is formed on the copper plating layer by a laser exposure apparatus, and then chrome plating for increasing the printing durability of the gravure cylinder is applied to complete the plate making (plate surface production).
- the phosphorus-containing copper balls generally used in the copper plating method and apparatus for gravure cylinders contain phosphorus: 350 to 700 ppm, oxygen: 2 to 5 ppm, and the remainder consists of copper and impurities. Due to impurities inevitably contained, anode sludge is generated during the plating process, which causes defects such as bumps (microprojections) and pits (pinholes) on the outer peripheral surface of the gravure cylinder. High purity phosphorus-containing copper balls are also used for semiconductor manufacturing and the like, but because of their high cost, they have not been adopted for gravure cylinders in terms of cost.
- the plating solution is periodically withdrawn and diluted. It is also necessary to adjust to an appropriate copper ion concentration or to treat the waste liquid.
- the peripheral surface near both ends is thicker than the straight body, and there is a separate process to make the plating thickness uniform by ex-post polishing. It is necessary.
- a copper plating method using an insoluble anode is known, and as a copper plating method and apparatus for a gravure cylinder by this, as an insoluble anode, for example, the surface of a titanium plate Prepare a plating tank and a copper dissolution tank using a material coated with iridium oxide, and dissolve the copper plating material (such as copper oxide or copper carbonate) in the dissolution tank.
- an insoluble anode for example, the surface of a titanium plate Prepare a plating tank and a copper dissolution tank using a material coated with iridium oxide, and dissolve the copper plating material (such as copper oxide or copper carbonate) in the dissolution tank.
- copper plating is performed by supplying current between the insoluble anode and the gravure cylinder forming the cathode (see, for example, Patent Document 3).
- the insoluble anode located below the gravure cylinder is configured to be movable up and down in the plating tank.
- current concentration does not occur in the vicinity of both ends of the gravure cylinder
- plating with a substantially uniform thickness can be applied over the entire length of the gravure cylinder, and the copper concentration and sulfuric acid of the plating solution can be applied.
- the present applicant has proposed a copper plating method and apparatus for a gravure cylinder capable of automatically adjusting the concentration (see Patent Document 4).
- the insoluble anode is directly installed in the plating solution, the consumption of additives such as brighteners and anti-kogation agents is remarkably increased, and the current density is 15 to 20 A to prevent kogation. / Dm 2 and a voltage of about 10 to 15 V, so it takes a long time for the plating process and power supply costs are inadequate, the plating thickness is insufficiently uniform, and the insoluble anode is located below the gravure cylinder.
- the hollow gravure cylinder is gripped at both ends in the longitudinal direction, and is accommodated in a plating tank filled with a copper plating solution at a predetermined speed.
- a pair of non-conductive anodes that are slidably suspended on both sides of the gravure cylinder in the plating tank and energized so as to be anodes are provided in the plating tank.
- the present applicant has already disclosed a copper plating method and apparatus for a gravure cylinder in which a long box-shaped anode chamber is placed close to both sides of the gravure cylinder at a predetermined interval, and the outer peripheral surface of the gravure cylinder is plated with copper. Proposed (Patent Document 5).
- the applicant of the present application has made further intensive research to divide the insoluble electrodes and adjust the electric potential of each divided electrode, thereby effectively preventing current concentration at the cylinder end.
- copper plating with a more uniform thickness can be applied over the entire length of the cylinder without causing defects such as bumps and pits regardless of the size of the cylinder, and the automatic concentration of the copper plating solution
- reduces the consumption of additives reduces the consumption of additives, enables plating in a short time, reduces power supply costs, and is easy to handle with good visibility. It is possible to significantly prevent the vicinity of both ends of the plating from being thicker than the straight body portion, and to eliminate or simplify the processing such as polishing to make the plating thickness uniform after the fact. It proposed a plating method and apparatus for a cylinder (Patent Document 6).
- the long cylinder is gripped at both ends in the longitudinal direction, accommodated in a plating tank filled with a plating solution, and energized to become a cathode while rotating at a predetermined speed.
- a pair of elongate box-shaped electrode chambers which are slidably slidable on both sides of the cylinder in the plating tank and are provided with a predetermined energization, are provided at predetermined intervals on both sides of the cylinder.
- a cylinder plating method in which the outer peripheral surface of the cylinder is plated, and the insoluble electrode is divided into a plurality of divided electrodes and corresponds to at least the vicinity of both ends in the longitudinal direction of the cylinder.
- Each of the insoluble electrode portions is divided into at least three divided electrode groups, and each divided electrode group has one or more divided electrodes, and the potentials of the divided electrode groups are controlled to control both of the cylinders. It is obtained so as to adjust the thickness of the plating layer of Part periphery surface (Patent Document 6, claim 1).
- the above-described cylinder plating apparatus includes a plating tank filled with a plating solution, chuck means for gripping both ends in the longitudinal direction so that a long cylinder can be rotated and energized, and accommodated in the plating tank, and the plating
- a pair of elongate box-shaped electrode chambers provided with insoluble electrodes that are slidably slidable on both sides of the cylinder in the tank and in which predetermined energization is performed, and the electrode chambers are disposed on both sides of the cylinder.
- a plating apparatus for a cylinder which is arranged close to a surface at a predetermined interval and plating the outer peripheral surface of the cylinder, wherein the insoluble electrode is divided into a plurality of divided electrodes and at least both ends in the longitudinal direction of the cylinder
- the insoluble electrode portion corresponding to the vicinity of each part is divided into at least three divided electrode groups, and each divided electrode group has one or more divided electrodes, and the potential of the divided electrode group is controlled.
- Te is obtained so as to adjust the thickness of the plating layer of both end portions the outer peripheral surface of the cylinder (Patent Documents 6, claim 10).
- the polishing that surely suppresses the plating of the vicinity of both end portions of the cylinder thicker than the straight body portion and makes the plating thickness uniform after the fact.
- it is still not perfect from the viewpoint of making the thickness of the plating layer uniform.
- the applicant of the present application was continuously pursuing a technique capable of forming a plating layer having a uniform thickness in the cylinder plating technique, and heat was accumulated in the cylinder during the plating process.
- the grip side end of the chuck means for gripping the cylinder also becomes high temperature, the gripping function is lowered, the uniformity of rotation of the cylinder is lowered, and the thickness uniformity of the plating layer is lowered. I got the knowledge that this would invite the situation.
- the applicant of the present invention has further studied to solve the above-described problems of the prior art, and as a result, by providing a heat cooling means in the chuck means for gripping the cylinder, the cylinder, particularly the cylinder end and The cylinder gripping part of the chuck means is cooled, the heat accumulation in the cylinder, particularly the cylinder end and the cylinder gripping part of the chuck means, is eliminated, the heat accumulation in the cylinder during the plating process is made uniform, and the chuck means It has been found that the oxidation of the front end portion of the resin is suppressed, and the present invention has been achieved.
- the present invention can improve the life of the entire apparatus in the cylinder plating technology, achieve uniform hardness of the plating layer on the cylinder surface, eliminate the unevenness of the hardness, and improve the tip of the chuck means. Oxidation can be suppressed, and a vicious cycle in which an oxide film is formed on the tip of the chuck means described above can be suppressed, and the overall length of the cylinder can be obtained without causing defects such as bumps and pits regardless of the size of the cylinder. It is an object of the present invention to provide a cylinder plating apparatus capable of performing plating with a more uniform thickness over a wide range.
- the cylinder plating apparatus of the present invention includes a plating tank filled with a plating solution, chuck means for gripping both ends in the longitudinal direction so that a long cylinder can be rotated and energized and accommodated in the plating tank, and the plating tank A pair of insoluble electrodes facing each other on both sides of the cylinder and receiving a predetermined energization, and the pair of insoluble electrodes are brought close to both sides of the cylinder at a predetermined interval.
- a cylinder plating apparatus for plating the outer peripheral surface of the cylinder,
- the chuck means is provided with a heat cooling means, and the heat cooling means has a cooling medium and circulates the cooling medium to cool the cylinder gripping portion of the chuck means, and the cylinder, particularly the cylinder end and the chuck means. It is characterized by eliminating heat accumulation in the cylinder gripping portion.
- the thermal cooling means includes a main pipe portion provided adjacent to a cylinder grip portion of the chuck means, a cooling medium flow path for circulating a cooling medium formed inside the main pipe portion, An external flow path communicating with the inlet and outlet of the cooling medium flow path, a cooling medium sealed in the cooling medium flow path and the external flow path, and the cooling medium flow installed in the external flow path
- the cooling medium sealed in the channel and the external flow path flows into the cooling medium flow path from the external flow path through the inlet, and from the cooling medium flow path through the outlet to the external flow path
- the insoluble electrode has a shape in which a lower portion is bent inward, and the insoluble electrode is configured to be rotatable about the upper end portion of the insoluble electrode. It is preferable to adjust the thickness of the plating layer on the outer peripheral surface of the cylinder by controlling the proximity distance to.
- the curved shape of the lower part of the insoluble electrode is improved if it is curved inward, but is curved so as to correspond to the curved surface of the outer peripheral surface of the cylinder. Is preferred.
- the interval at which the insoluble electrode is brought close to the side surface of the cylinder is about 1 mm to 50 mm, preferably about 3 mm to 40 mm, and most preferably about 5 mm to 30 mm.
- the plating solution may be a copper plating solution, and the cylinder may be a gravure cylinder.
- the copper plating solution contains copper sulfate, sulfuric acid, chlorine and additives, and the specific gravity and sulfuric acid concentration of the copper plating solution are measured. If the specific gravity is too high, water is replenished and the sulfuric acid concentration is too high. In some cases, it is preferable to replenish cupric oxide powder. This eliminates the need for conventional periodic copper plating solution maintenance and waste liquid treatment.
- the copper plating solution is preferably formed by removing impurities with a filter. It is also possible to perform chrome plating by using the plating solution as a chrome plating solution.
- the present invention cools a cylinder, particularly the cylinder end of the cylinder and the chuck means of the chuck means during the plating process by providing a heat cooling means in the chuck means for holding the cylinder, and the cylinder, particularly the cylinder end and the chuck means.
- the life of the entire device can be improved by the cylinder plating technology, and the hardness of the plating layer on the cylinder surface can be made uniform to reduce the unevenness of the hardness. It is possible to suppress the oxidation of the tip of the chuck means and suppress the vicious circle that the oxide film is formed on the tip of the chuck means described above, and it is particularly suitable for the gravure cylinder plating process. It achieves a great effect of being able to.
- FIG. 3 is a schematic side view showing an example of the basic configuration of the cylinder plating apparatus of the present invention.
- reference numeral 2 denotes a cylinder plating apparatus of the present invention.
- the copper plating apparatus 2 for a gravure cylinder of the present invention is an apparatus for performing copper plating on the outer peripheral surface of a long hollow cylindrical gravure cylinder 300, and a pair of chuck means 14 for supporting the plating tank 10 and the gravure cylinder 300. , 14 and a pair of insoluble electrodes 22, 22 suspended from the plating tank 10 through bus bars 20, 20.
- the plating tank 10 has a configuration that is almost the same as that of a conventional apparatus (see Patent Documents 1 to 3, 5, and 6), and repeated description is omitted.
- 304 is a tank for plating treatment, and the gravure cylinder 300 can be immersed in the copper plating solution 304 so as to be completely immersed.
- a recovery port 12 for recovering the overflowed copper plating solution 304 is provided around the plating tank 10 (see FIGS. 3 to 5), and a copper plating solution is communicated with the recovery port 12 below the plating tank 10.
- a storage tank 70 is provided for storing 304 (see FIG. 3).
- the storage tank 70 is provided with a heater 86 and a heat exchanger 88 for keeping the copper plating solution 304 at a predetermined liquid temperature (for example, about 40 ° C.), and filtration for removing impurities of the copper plating solution 304.
- a pump 80 or the like that pumps up the copper plating solution 304 from the storage tank 70 and circulates in the plating tank 10 is provided (see FIG. 3).
- the chuck means 14, 14 is a roll chuck device that grips both longitudinal ends of the gravure cylinder 300 and accommodates the gravure cylinder 300 in the plating tank 10, and includes a spindle 16 that is supported by a bearing 6. 306 is driven to rotate at a predetermined speed (for example, about 120 rpm) via the chain C and the sprocket 18 and can be energized so that the gravure cylinder 300 becomes a cathode (see FIG. 3).
- a lid plate 8 and an exhaust duct 11 that can be freely opened and closed above the plating tank 10 are provided as appropriate (see FIG. 3).
- a feature of the present invention is that the cooling means is provided in the chuck means for gripping the cylinder to cool the cylinder, particularly the cylinder end portion and the cylinder gripping portion of the chuck means, during the plating process.
- the heat accumulation in the cylinder gripping portion of the chuck means is eliminated, the heat accumulation in the cylinder during the plating process is made uniform, and the thickness of the plating layer is further made uniform in the cylinder plating.
- FIG. 1 is a schematic front view showing an example of a configuration in which a thermal cooling means is provided in a chuck means of a cylinder in a cylinder plating apparatus of the present invention.
- FIG. 3 is a schematic side view showing an example of the basic configuration of the cylinder plating apparatus of the present invention.
- the pair of chuck means 14 for gripping the cylinder 300 at both ends thereof are provided with thermal cooling means 100 (only one chuck means 14 is shown in FIG. 1).
- the chuck means 14 and 14 grip both ends of the cylinder 300 by cylinder gripping portions (generally called chuck cones) 14a and 14a, respectively.
- the thermal cooling means 100 is provided with a main pipe portion 102 adjacent to the cylinder gripping portion 14 a of the chuck means 14.
- a cooling medium flow path 106 for circulating the cooling medium 104 is formed inside the main pipe portion 102.
- An inlet 108 and an outlet 110 are formed at the rear end portion 14 b of the chuck means 14 so as to communicate with the cooling medium flow path 106 and allow the cooling medium 104 to flow in and out.
- An external flow path 112 is provided outside the main pipe portion 102 and communicates with the inflow port 108 and the outflow port 110.
- As the cooling medium 104 a gas-liquid two-phase cooling medium, such as distilled water, is preferably used, but it goes without saying that other known cooling media can be used.
- the cooling medium 104 is enclosed in the cooling medium flow path 106 and the external flow path 112.
- Reference numeral 114 denotes a circulation pump means, which is installed in the external flow path 112.
- the cooling medium 104 sealed in the cooling medium flow path 106 and the external flow path 112 flows into the cooling medium flow path 106 from the external flow path 112 through the inlet 108. At the same time, it acts to flow out from the cooling medium channel 106 to the external channel 112 through the outlet 110.
- a cooling device 116 is installed in the external flow path 112 and acts to cool the cooling medium 104 flowing out from the outlet 110.
- the heat accumulation in the cylinder gripping portion of the chuck portion and the chuck means is eliminated, so that an extreme temperature rise of the cylinder 300 is avoided and a temperature rise of the cylinder gripping portion 14a is also avoided.
- the thickness of the plating layer can be further uniformized in the cylinder plating process.
- FIG. 8 is a schematic front view showing an example of installation of insoluble electrodes in the cylinder plating apparatus of the present invention.
- FIG. 2 is an enlarged perspective view of the essential part of the cylinder plating apparatus of the present invention.
- bus bars 20 and 20 are attached to support bars 23 and 23 via auxiliary members 21, and the bus bars 20 and 20 are attached to the bus bars 20 and 20.
- Insoluble electrodes 22 and 22 are suspended from opposite sides of the gravure cylinder 300 held by the chuck means 14 in the plating tank 10, and the surface of the titanium plate is coated with iridium oxide or the like. Is used.
- the insoluble electrodes 22 and 22 have a shape in which lower portions thereof are bent inward.
- the curved shape of the lower part of the insoluble electrodes 22, 22 the effect is improved if it is curved inward, but a curved shape corresponding to the curved surface of the outer peripheral surface of the gravure cylinder 300 is preferable.
- the insoluble electrodes 22 and 22 are configured such that the insoluble electrodes 22 and 22 can be rotated around the upper end portions thereof as rotation centers, and the outer periphery of the gravure cylinder is controlled by controlling the proximity distance to the gravure cylinder 300. The thickness of the plating layer on the surface can be adjusted.
- FIG. 7 is a front explanatory view showing an operation example of the insoluble electrode in the present invention.
- 300A is a virtual cylinder of the maximum diameter
- 300B is a virtual cylinder of the minimum diameter.
- Reference numeral 64 denotes a rotating shaft attached to the plating tank 10.
- a bus bar 20 is attached to the rotary shaft 10
- an insoluble electrode 22 is attached to the tip of the bus bar 20.
- the insoluble electrode 22 is rotated in accordance with the diameters of the cylinders 300, 300A, and 300B, and the proximity distance to the surface of the cylinders 300, 300A, and 300B is set to the optimum position.
- Plating can be performed under control.
- FIG. 4 is an explanatory plan view showing an example of the insoluble electrode sliding mechanism in the present invention.
- FIG. 5 is an explanatory side view showing an example of the sliding mechanism of the insoluble electrode in the present invention.
- FIG. 6 is a front explanatory view showing an example of the insoluble electrode sliding mechanism in the present invention.
- a gantry 4 is erected outside the front surface of the plating tank 10, and linear rails 50 and 52 are provided on the inner wall surface of the gantry 4.
- racks 60 and 62 are provided so as to reciprocate by forward and reverse rotation of the spur gears 35 and 38, and with the linear rails 50 and 52 via the mounting frames 58 and 59, respectively.
- the guide members 54 and 55 are slidably engaged with each other.
- the spur gears 35 and 38 for reciprocating the racks 60 and 62 are fixed to the gantry 4 with the mounting bracket 40 so that the spur gear 35 rotates coaxially with the sprocket 45 on the outer wall surface side of the gantry 4,
- the spur gear 38 is fixed to the gantry 4 with a mounting bracket 39 so as to rotate coaxially with the sprocket 48 on the outer wall surface side of the gantry 4.
- a sprocket 44 is provided directly below the sprocket 45 so as to rotate coaxially with the spur gear 34, and a sprocket 47 is provided directly below the other sprocket 48 so as to rotate coaxially with the sprocket 46. ing.
- a geared motor 30 is installed on the outer wall surface of the gantry 4 via a mounting angle 31, and a spur gear 32 is provided.
- a spur gear 33 is provided so as to rotate coaxially with the sprocket 43 so as to engage with the spur gear 32, and a chain C ⁇ b> 1 is engaged between the sprockets 43, 46, and between the sprockets 44, 45. Engages the chain C2 and engages the chain C3 between the sprockets 47,48.
- the interval at which the insoluble electrodes 22 and 22 are brought close to the side surface of the gravure cylinder 300 is about 1 mm to 50 mm, preferably about 3 mm to 40 mm, and most preferably about 5 mm to 30 mm. From the viewpoint of uniform plating thickness, it can be said that the insoluble electrodes 22 and 22 are closer to each other. However, if they are too close, the insoluble electrodes 22 and 22 and the gravure cylinder 300 come into contact with each other during the copper plating process. This is because there is a risk of end.
- the copper plating apparatus 2 for a gravure cylinder of the present invention preferably further includes a copper plating solution automatic management mechanism as described in Patent Document 5, but detailed description thereof is omitted.
- the copper plating solution automatic management mechanism is a management mechanism for adjusting the copper concentration and sulfuric acid concentration of the copper plating solution stored in the storage tank.
- Copper plating solution for example, copper sulfate (CuSO 4 ⁇ 5H 2 O) Concentration: 200 ⁇ 250g / L, sulfuric acid (H 2 SO 4) concentration: 50 ⁇ 70g / L, chlorine (Cl) concentration: 50 ⁇ 200 ppm and gloss
- concentration of the additive such as an agent and a kogation inhibitor
- the reduced copper ion concentration is the automatic management of the copper plating solution to adjust the copper ion concentration by causing a reaction of CuO + H 2 SO 4 ⁇ CuSO 4 + H 2 O by adding cupric oxide (CuO).
- a mechanism is introduced. This is preferable because it eliminates the need for conventional regular copper plating solution maintenance and waste liquid treatment.
- Example 1 to 3 An apparatus having the configuration shown in FIG. 3 was used as the plating apparatus.
- the copper plating solution copper sulfate concentration 220 g / L, sulfuric acid concentration 60 g / L, chlorine concentration 120 ppm, additive “Cosmo RS-MU” (manufactured and sold by Daiwa Special Co., Ltd.) 5 mL / L, “Cosmo RS-1” ”(Manufactured and sold by Daiwa Special Co., Ltd.) was used as a copper sulfate plating solution containing 2 mL / L.
- Example 1 As the gravure cylinder, an aluminum core cylindrical substrate having a circumference of 500 mm and a total length of 1100 mm is used, and both ends of the gravure cylinder are chucked by a chuck means provided with a heat cooling means as shown in FIG.
- the insoluble electrode was brought close to the side surface of the gravure cylinder up to 30 mm by a computer-controlled slide mechanism, the copper plating solution was overflowed, and the gravure cylinder was completely submerged.
- the rotation speed of the gravure cylinder was 120 rpm, the liquid temperature was 40 ° C., and the current density was 16 A / dm 2 (total current 890 A, voltage 7 V). As shown in FIGS.
- an electrode having a shape in which a lower end portion is curved inward is used. Copper plating was performed until the thickness became 100 ⁇ m under these conditions. The time required for the plating process was about 20 minutes. The end face shape of the plated cylinder was measured with a laser measuring instrument. The plating surface was free of bumps and pits and could be plated with a uniform thickness over the entire length of the gravure cylinder. In particular, the uniformity of the plating thickness is maintained at both ends of the gravure cylinder, and the vicinity of both ends of the gravure cylinder can be largely prevented from being plated thicker than the straight body portion.
- Example 2 A plating process was performed in the same manner as in Example 1 except that an aluminum core cylindrical substrate having a circumference of 430 mm and a total length of 1100 mm was used as the gravure cylinder, and the same results as in Example 1 were obtained.
- Example 3 A plating process was performed in the same manner as in Example 1 except that an aluminum core cylindrical substrate having a circumference of 920 mm and a total length of 1100 mm was used as the gravure cylinder, and the same results as in Example 1 were obtained.
- the present invention is not limited to this example, and the case where the chrome plating is applied to the gravure cylinder is also described. It can also be applied when plating other than copper plating on other cylindrical objects to be plated, for example, when nickel plating is applied to a printing cylinder for rotary screen printing. Applicable to.
- FIG. 1 the structure shown in FIG. 1 as the heat cooling means 100 has been described.
- a known heat cooling means such as a heat pipe means may be applied.
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Abstract
Description
前記チャック手段に熱冷却手段を設け、該熱冷却手段が冷却媒体を有し該冷却媒体を循環させることによって該チャック手段のシリンダ把持部を冷却し該シリンダ、特にシリンダ端部及び該チャック手段のシリンダ把持部における熱の蓄積を解消するようにしたことを特徴とする。
本発明のグラビアシリンダ用銅メッキ装置2は、長尺中空円筒状のグラビアシリンダ300の外周表面に銅メッキを施すための装置であり、メッキ槽10、グラビアシリンダ300を支持する一対のチャック手段14,14、ブスバー20,20を介して該メッキ槽10に垂設される一対の不溶性電極22,22を備えるものである。メッキ槽10については、従来の装置(特許文献1~3、5、6参照)と略同様の常用の構成を有するものであり、重複した説明は省略するが、メッキ槽10は、銅メッキ液304が満たされるメッキ処理用の槽であり、グラビアシリンダ300を銅メッキ液304中に全没するように浸漬可能とされている。メッキ槽10の周囲には、オーバーフローした銅メッキ液304を回収する回収口12が設けられ(図3~図5参照)、メッキ槽10の下方には、回収口12と連通して銅メッキ液304を溜めておく貯留槽70を備える(図3参照)。貯留槽70には、銅メッキ液304を所定の液温(例えば40℃程度)に保つためのヒータ86及び熱交換器88が内設され、銅メッキ液304の不純物の除去を行うための濾過器80や、貯留槽70から銅メッキ液304を汲み上げてメッキ槽10に循環せしめるポンプP1等が設けられている(図3参照)。
グラビアシリンダとして、円周500mm、全長1100mmのアルミ芯の円筒形基材を用い、グラビアシリンダの両端を図1に示したような熱冷却手段を設けたチャック手段によってチャックしてメッキ槽に装着し、不溶性電極をコンピュータ制御されたスライド機構により30mmまでグラビアシリンダ側面に近接させ、銅メッキ液をオーバーフローさせ、グラビアシリンダを全没させた。グラビアシリンダの回転速度を120rpmとし、液温40℃、電流密度16A/dm2(総電流890A、電圧7V)とした。図8及び図2に示したように、下端部分を内方に湾曲させた形状の電極を用いた。この条件で厚さ100μmとなるまで銅メッキした。メッキ処理に要した時間は約20分であった。メッキ処理されたシリンダの端面形状をレーザー計測器によって測定した。メッキ表面はブツやピットの発生がなく、グラビアシリンダの全長に亘って厚みの均一なメッキが可能であった。特に、グラビアシリンダの両端部においてもメッキの厚みの均一性は保たれており、グラビアシリンダの両端部近傍が直胴部に比べて厚くメッキされるのを大幅に抑止できていた。
グラビアシリンダとして、円周430mm、全長1100mmのアルミ芯の円筒形基材を用いた以外は、実施例1と同様にしてメッキ処理を行ったところ、実施例1と同様の結果を得た。
グラビアシリンダとして、円周920mm、全長1100mmのアルミ芯の円筒形基材を用いた以外は、実施例1と同様にしてメッキ処理を行ったところ、実施例1と同様の結果を得た。
Claims (3)
- メッキ液が満たされるメッキ槽と、長尺状のシリンダを回転可能且つ通電可能に長手方向両端を把持して該メッキ槽に収容するチャック手段と、該メッキ槽内でシリンダの両側面に対向して垂設され且つ所定の通電が行われる相対向する一対の不溶性電極とを備え、該一対の不溶性電極を該シリンダの両側面に所定間隔をおいて近接せしめ、該シリンダの外周表面にメッキを施すようにしたシリンダ用メッキ装置であって、
前記チャック手段に熱冷却手段を設け、該熱冷却手段が冷却媒体を有し該冷却媒体を循環させることによって該チャック手段のシリンダ把持部を冷却し該シリンダ、特にシリンダ端部及び該チャック手段のシリンダ把持部における熱の蓄積を解消するようにしたことを特徴とするシリンダ用メッキ装置。 - 前記熱冷却手段が、前記チャック手段のシリンダ把持部に隣接して設けられたメインパイプ部と、該メインパイプ部の内部に形成された冷却媒体を流通させるための冷却媒体用流路と、該冷却媒体用流路の流入口及び流出口に連通する外部流路と、該冷却媒体用流路及び外部流路に封入された冷却媒体と、該外部流路に設置されかつ該冷却媒体用流路及び外部流路に封入された冷却媒体が該外部流路から該流入口を介して該冷却媒体用流路に流入するとともに該冷却媒体用流路から該流出口を介して該外部流路に流出するように作用する循環ポンプ手段と、該外部流路に設置されかつ該流出口から流出する該冷却媒体を冷却するように作用する冷却装置と、を含むことを特徴とする請求項1記載のシリンダ用メッキ装置。
- 前記メッキ液が銅メッキ液又はクロムメッキ液であり、前記シリンダが中空円筒状のグラビアシリンダであることを特徴する請求項1又は2記載のシリンダ用メッキ装置。
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JP2012536456A JPWO2012043513A1 (ja) | 2010-10-01 | 2011-09-27 | シリンダ用メッキ装置 |
KR1020127031254A KR20130114573A (ko) | 2010-10-01 | 2011-09-27 | 실린더용 도금장치 |
EP11829066.7A EP2623646A4 (en) | 2010-10-01 | 2011-09-27 | DEVICE FOR PLATING A CYLINDER |
CN201180027638.9A CN102933751B (zh) | 2010-10-01 | 2011-09-27 | 滚筒用镀敷装置 |
US13/818,201 US20130153410A1 (en) | 2010-10-01 | 2011-09-27 | Apparatus for plating cylinder |
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WO2019176586A1 (ja) * | 2018-03-16 | 2019-09-19 | 株式会社シンク・ラボラトリー | シリンダ体メッキ装置用集電部材及びメッキ装置 |
WO2023167009A1 (ja) * | 2022-03-01 | 2023-09-07 | 株式会社シンク・ラボラトリー | シリンダ用3価クロムめっき装置及び方法 |
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ES2683243T3 (es) * | 2014-03-31 | 2018-09-25 | Think Laboratory Co., Ltd. | Aparato y método de chapar cilindros |
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US20130153410A1 (en) | 2013-06-20 |
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