KR102348083B1 - Cathode drum for electrolytic deposition and method for assembling the same - Google Patents

Abstract

The present invention relates to a negative electrode drum for electrolytic deposition, and a method for assembling the same, which can increase conductivity. The negative electrode drum for electrolytic deposition of the present invention comprises: a multi-stepped axis including a large-diameter part and a small-diameter part; a titanium lining; a pair of copper linings provided with a gold-plated layer; and a pair of circular bars provided to be inserted into a hollow part of each of the copper linings.

Description

Cathode drum for electrolytic deposition and method for assembling the same

The present invention relates to a cathode drum for electrolytic deposition for obtaining an electrolytic thin plate from an electrolytic cell and a method for assembling the same.

In more detail, the point where the potential difference and contact failure are attenuated by simplifying the contact path, the conductivity is increased by plating the inside of the copper lining, which is one contact, and the conductivity is increased. It relates to a cathode drum for electrolytic deposition, characterized by standardizing the precipitation width of the copper foil deposited on the outer circumferential surface, and enhancing corrosion resistance to electrolyte by installing a non-ferrous metal side ring on the outer surface of the titanium side ring, and a method for manufacturing the same. .

Light, thin, compact, and lightweight electrical and electronic devices are accelerating, and accordingly, circuits built into the devices are also being miniaturized.

Accordingly, circuits formed on the PCB are also becoming thinner and thinner. Accordingly, the thin electrodeposited copper plate is also being made into an ultra-thin plate, and accordingly, the importance of the high-quality electrodeposited copper plate is increasing.

In order to obtain an electrolytic thin plate made of iron, copper, chromium, nickel, etc., the thin electrolytic plate is manufactured by an anode drum and an anode drum together with an anode electrode at regular intervals and including an anode electrode placed in an electrolytic cell, an insoluble drum-type cathode Between the ash and the insoluble anode material, an electrolytic reaction is performed while supplying an electrolytic solution containing metal ions, thereby electrolytically depositing a target thickness on the surface of the drum-type anode material to form a thin metal plate. Then, the formed thin metal plate is peeled off from the surface of the drum-type negative electrode material to prepare it.

That is, in the manufacture of an electrolytic thin plate, an electrolytic reaction of iron, copper, chromium, nickel, etc. is passed between a rotating cathode having a drum shape and a lead-based anode, etc. disposed opposite to each other according to the shape of the rotating cathode drum, and the electrolytic reaction is carried out. Copper is deposited on the surface of the rotating cathode drum by using the copper, and when the deposited copper is in a thin state, it is continuously peeled off from the rotating cathode drum and wound up.

As shown in FIGS. 1 and 2 , the apparatus for manufacturing an electrolytic thin plate includes an electrolytic cell 1 to which an electrolyte 2 is continuously supplied, and a cathode rotating with a part submerged in the electrolyte 2 of the electrolytic cell 1 . It includes a drum (4) and an anode electrode (3) arranged along the shape of the cathode drum (4).

For example, the electrolyte solution 2 is a copper sulfate solution containing sulfuric acid, copper ions and chlorine ions, and has strong acid properties. The electrolyte (2) is supplied and circulated in the electrolytic cell (1) at a relatively high speed in order to prevent a deficiency of copper ions in the vicinity of the cathode drum (4).

In addition, the surface material of the negative electrode drum (4) is composed of titanium that maintains acid resistance to the electrolyte (2) and facilitates the peeling of the thin metal plate (5). In this configuration, when a high-density current is applied between the negative electrode drum 4 charged to the negative potential and the positive electrode 3 charged to the positive potential using the electrolyte 2 as a medium, the positive ions contained in the electrolyte 2 Copper in the state of being fused to the cathode drum, and thus solidified and precipitated as a solid.

The deposited copper is made into a thin electrodeposited copper plate 5 in the form of a metal thin plate along the surface of the rotating negative electrode drum 4, and the thin electrodeposited copper plate 5 is guided by guide rollers 6 and a bobbin 7 ) will be caught in Both ends of the rotating shaft 8 are supported by bearings 9 and a DC power supply 11 for supplying electricity and a energizing ring 10 through which DC current is conducted are shown.

The cathode drum (4) has an inner cylinder and an outer cylinder around the rotating shaft (8), and the inner cylinder is manufactured and machined into a cylindrical shape using iron or carbon steel, etc., and then mounted, The outer cylinder is formed by forming a titanium rolled plate with a thickness of about 5 to 8 mm into a cylindrical shape, and is press-fitted by shrink fit to the inner cylinder. In addition, the surface of the outer cylinder is machined and polished. In particular, since titanium has superior properties such as corrosion resistance, wear resistance, and heat resistance compared to other functional metals, it is used as the outer cylinder of the negative electrode drum.

When the current is supplied to the energizing ring 10 for supplying electricity to the left and right, it is supplied to the outer cylinder made of titanium through the inner cylinder made of iron or carbon steel through the rotating shaft 9 .

In such a conventional negative electrode drum, a potential difference is likely to occur, and contact failure may occur because the current must pass through many contacts in the process of transferring current from the energizing ring 10 to the rotating shaft 9, the inner cylinder and the outer cylinder.

In addition, in the conventional negative electrode drum, the surface material of the negative electrode drum 4 can maintain acid resistance to the electrolyte 2 and is composed of titanium that facilitates the peeling of the thin metal plate 5, but titanium is also Since it is a metal, corrosion is inevitable due to the strong acidity of the electrolyte over time, so countermeasures are required.

In addition, since the conventional negative electrode drum has a smooth structure on the outer peripheral surface of the outer cylinder, a problem in that the width of the copper foil fused to the surface is not uniformly precipitated is also pointed out.

Document 1: Domestic Patent Publication No. 10-1126969 Document 2: Korean Patent Publication No. 10-2018-0105476

An object of the present invention is to provide a cathode drum for electrolytic deposition capable of attenuating a potential difference and a contact defect by simplifying a contact path.

Another object of the present invention is to provide a cathode drum for electrolytic deposition capable of increasing conductivity by plating the inside of a copper lining, which is a contact point, with gold.

Another object of the present invention is to provide a cathode drum for electrolytic deposition capable of standardizing the precipitation width of copper foil deposited on the outer circumferential surface of the outer drum by laying a width limiting ring on the outer circumferential surface of the non-ferrous metal side ring.

Another object of the present invention is to provide a cathode drum for electrolytic deposition capable of enhancing corrosion resistance to electrolyte by installing a non-ferrous metal side ring on the outer surface of the titanium side ring.

Another object of the present invention is to provide a method for assembling a cathode drum for electrolytic deposition for the above purpose.

The technical problems to be achieved by the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned can be clearly understood by those of ordinary skill in the art to which the present invention belongs from the description below. There will be.

One aspect of the present invention is a cathode drum for electrolytic deposition of a cathode drum comprising a shaft, a cathode drum coupled to the center of the shaft, and an electric wire for applying a current from the shaft to the cathode drum, the shaft comprising a large diameter part; a multi-stage shaft provided on both sides of the large-diameter portion and comprising a small-diameter portion having an outer diameter smaller than that of the large-diameter portion; Titanium linings provided in-line at both ends of the multi-speed shaft; a pair of copper linings provided in-line at the distal end of each titanium lining and provided with a high-conductivity gold plated layer forming a first contact point on an inner circumferential surface; and a pair of round rods provided to be inserted into the hollow portion of each copper lining, wherein the negative electrode drum is provided with a fitting hole to be fitted on the outer peripheral surface of the small-diameter portion of the multi-axis at the center, and spaced apart from each other A pair of steel side plates arranged in a state; A pair of titanium side plates provided with a fitting hole fitted to the outer circumferential surface of the titanium lining in the center and spaced apart from the steel side plate; a steel bar passing through the steel side plate to interconnect the pair of titanium side plates; a titanium side ring disposed in close contact with an outer edge portion of the titanium side plate; a non-ferrous metal side ring disposed in close contact with the outer surface of the titanium side ring; an inner drum disposed on the edge side between the titanium side plates, the inner circumferential surface of which is in close contact with the outer circumferential surface of the steel side plates, and having a second contact point through which current is conducted; and an outer drum disposed on the edge side between the non-ferrous metal side rings, the inner circumferential surface of which is in close contact with the outer circumferential surfaces of the titanium side ring, the titanium side plate, and the inner drum, wherein the electric wire is the first contact point It provides a cathode drum for electrolytic deposition further comprising connecting between the and the second contact point.

Preferably, it stacked on at least the outer peripheral surface of the non-ferrous metal side ring, it may further include a width limiting ring having an outer diameter larger than the outer diameter of the outer drum.

Preferably, while being interposed between the steel side plates, it may further include a wire support ring for supporting the wire.

Another aspect of the present invention is the method of assembling the cathode drum for electrolytic deposition described above, wherein the steel side plate assembly step of fitting the fitting holes of each steel side plate to the outer circumferential surface of each small diameter part of the multi-axis and fixing it by welding ( S100); an inner drum assembly step (S200) of inserting the inner circumferential surface of the inner drum into close contact with the outer circumferential surface of the pair of steel side plates; a steel bar assembling step (S300) of assembling the steel bar through the pair of steel side plates; introducing the assembly in which the steel side plate, the inner drum and the steel rod are assembled into the outer drum (S400); A titanium lining assembly step (S500) of inserting the fitting hole of each titanium side plate into the outer circumferential surface of each titanium lining, inserting it into the outer drum, and assembling the end of the steel bar and bolts; A titanium side ring assembling step (S600) of assembling each of the titanium side rings into the inside of the outer drum, but in close contact with the outer surface of each of the titanium linings; and a non-ferrous metal side ring assembly step (S700) of attaching each non-ferrous metal side ring to the outer surface of each titanium side ring, and then bolting the side ring (S700).

According to an embodiment of the present invention, it is possible to attenuate a potential difference and a contact defect by simplifying a contact path for applying a current.

In addition, the present invention can improve the conductivity by performing a gold plating treatment with the highest electrical conductivity inside the copper lining, which is a contact point for applying a current.

In addition, the present invention can standardize the precipitation width of the copper foil deposited on the outer circumferential surface of the outer drum by laying the width limiting ring on the outer circumferential surface of the non-ferrous metal side ring, thereby improving the standard quality of the precipitating copper foil.

In addition, the present invention can strengthen the corrosion resistance to the electrolyte by installing a non-ferrous metal side ring on the outer surface of the titanium side ring. Therefore, the life span of the negative electrode drum is contributed.

In addition, the present invention contributes to productivity improvement by an efficient assembly method.

It should be understood that the effects of the present invention are not limited to the above-described effects, and include all effects that can be inferred from the configuration of the invention described in the detailed description or claims of the present invention.

1 is a schematic diagram of a conventional cathode drum for electrolytic deposition;
Fig. 2 is a schematic longitudinal cross-sectional view of Fig. 1;
3 is a perspective view of an assembled state of the cathode drum for electrolytic deposition according to the present invention;
4 is an exploded perspective view of FIG. 3
5 is a cross-sectional view taken along line AA of FIG.
6 is a flowchart for explaining the assembly process of the cathode drum for electrolytic deposition according to the present invention.

The present invention may be embodied in several different forms, and thus is not limited to the embodiments described herein. And in order to clearly explain the present invention in the drawings, parts irrelevant to the description are omitted, and similar reference numerals are assigned to similar parts throughout the specification.

Throughout the specification, when a part is said to be “connected (connected, contacted, coupled)” with another part, it is not only “directly connected” but also “indirectly connected” with another member interposed therebetween. "Including cases where In addition, when a part "includes" a certain component, this means that other components may be further provided without excluding other components unless otherwise stated.

The terminology used herein is used only to describe specific embodiments, and is not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present specification, terms such as “comprise” or “have” are intended to designate that a feature, number, step, operation, component, part, or a combination thereof described in the specification exists, but one or more other features It should be understood that this does not preclude the existence or addition of numbers, steps, operations, components, parts, or combinations thereof.

3 is a perspective view of an assembled state of the anode drum for electrolytic deposition according to the present invention, FIG. 4 is an exploded perspective view of FIG. 3, and FIG. 5 is a cross-sectional view taken along line A-A of FIG.

Referring to the drawings above, the anode drum 100 for electrolytic deposition according to the present invention is a shaft 200, a cathode drum 300 which is rotated by the shaft 200 and installed so as to be partially submerged in the electrolyte of the electrolytic cell, the It may be composed of a wire 400 for applying a current from the shaft 200 to the cathode drum 300 .

The shaft 200 includes a multi-stage shaft 210 forming a central portion thereof. The multi-stage shaft may include a large-diameter portion 211 having a relatively large outer diameter and a pair of small-diameter portions 212 having a relatively small outer diameter compared to the large-diameter portion, and the multi-stage shaft 210 is the wire ( 400) may be hollow so that it can be wired.

The shaft 200 may include a pair of titanium linings 220 provided in-line at both ends of the multi-stage shaft 210 . Since the titanium lining 220 is located close to the cathode drum 300, it is preferable to use a titanium material having excellent corrosion resistance in consideration of the possibility of being corroded by the electrolyte during the electrolytic deposition operation.

The shaft 200 is provided in-line at the distal end of each titanium lining 220 and may include a pair of copper linings 230 forming the first contact point C1 on the inner circumferential surface. Here, on the inner peripheral surface of the copper lining 230 , at least a portion in contact with the first contact C1 may be provided with a gold plating layer 231 plated with gold to improve conductivity.

The shaft 200 may include a pair of round bars 240 provided to be inserted into the hollow portion of each copper lining 230 .

The negative electrode drum 300 is provided with a fitting hole 311 fitted on the outer circumferential surface of the small-diameter portion 212 of the multi-stage shaft 210 in the center, and a pair of steel side plates 310 spaced apart from each other. may include Here, the fitting hole 311 may be coupled to the small-diameter portion 212 by welding.

The negative electrode drum 300 is provided with a fitting hole 321 fitted to the outer circumferential surface of the titanium lining 220 in the center, and a pair of titanium side surfaces disposed on the outside of the steel side plate 310 to be spaced apart. A plate 320 may be included. Here, since the titanium side plate 320 is a portion in contact with the electrolyte when the negative electrode drum 300 is partially immersed in the electrolyte of the electrolytic cell, it is preferable to be made of a titanium material having excellent corrosion resistance to prevent corrosion.

The negative electrode drum 300 may include a steel rod 330 penetrating through the steel side plate 310 to interconnect the pair of titanium side plates 320 . Both ends of the steel rod 330 may be bolted to the titanium side plate 320 . Accordingly, the pair of titanium side plates 320 can be firmly coupled while maintaining a predetermined distance.

The negative electrode drum 300 may include a pair of titanium side rings 340 disposed in close contact with the outer edge of the titanium side plate 320 . Here, since the titanium side ring 340 also comes into contact with the electrolyte when the cathode drum 300 is partially immersed in the electrolyte of the electrolytic cell, it is preferable to be made of a titanium material with excellent corrosion resistance to prevent corrosion.

The negative electrode drum 300 may include a pair of non-ferrous metal side rings 350 that are disposed in close contact with the outer surface of the titanium side ring 340 . Since the non-ferrous metal side ring 350 is assembled in close contact with the outer surface of each titanium side ring 340 , it is possible to delay or prevent corrosion of at least the outer surface of the titanium side ring 340 by the electrolyte.

The anode drum 300 is disposed on the edge side between the titanium side plates 320, the inner peripheral surface of which is in close contact with the outer peripheral surface of the steel side plate 310, and has a second contact point C2 through which current is conducted. An inner drum 350 may be included. Since the inner drum 350 does not come into contact with the electrolyte, it may be made of an iron material to reduce costs. In addition, the second contact point C2 is made of a conductor and, for example, may be formed in the form of a headless bolt.

The negative electrode drum 300 is disposed on the edge side between the non-ferrous metal side rings 350, and the inner peripheral surface is in close contact with the outer peripheral surface of the titanium side ring 340, the titanium side plate 320 and the inner drum 350 It may include an external drum 360 that is. Here, since the outer drum 360 is a portion in contact with the electrolyte, it is preferable to be made of a titanium material having excellent corrosion resistance in order to prevent corrosion.

The negative electrode drum 300 may further include a width limiting ring 370 that is stacked on at least the outer peripheral surface of the non-ferrous metal side ring 350 and has an outer diameter larger than the outer diameter of the outer drum. The width limiting ring 370 can maintain a constant precipitation width of the copper foil deposited on the outer circumferential surface of the outer drum by forming an edge chin of the outer drum 360, so that a standardized copper foil of a certain width can be deposited. Thereby, the standard quality of copper foil can be improved.

The electric wire 400 serves to apply a current from the shaft 200 to the cathode drum 300 by electrically connecting the first contact point C1 and the second contact point C2, and directly connect the two contacts. Since it is connected, it is possible to solve the problem of the existing contact structure in which a potential difference occurred while passing through a number of contacts.

6 is a flowchart for explaining the assembly process of the cathode drum for electrolytic deposition according to the present invention. 6, the assembly sequence of the cathode drum for electrolytic deposition according to the present invention is as follows.

Step 1, assembling the steel side plate (S100)

The first step is a process of inserting the fitting hole 311 of each steel side plate 310 into the outer peripheral surface of each small-diameter portion 212 of the multi-speed shaft 210 and fixing it by welding (w).

Step 2, assembling the inner drum (S200)

Step 2 is a process of inserting the inner circumferential surface of the inner drum into close contact with the outer circumferential surface of the pair of steel side plates 310 .

Step 3, assembling the steel bar (S300)

Step 3 is a process of assembling the steel bar 330 through the pair of steel side plates 310 .

Step 4, assembly inlet step (S400)

Step 4 is a process of inserting the assembly in which the steel side plate 310 , the inner drum 350 and the steel rod 330 are assembled into the outer drum 360 .

Step 5, assembling the titanium lining (S500)

In step 5, after fitting the fitting hole 321 of each titanium side plate 320 to the outer circumferential surface of each titanium lining 220, it is introduced into the outer drum 360, and the steel rod 330 ) is the process of assembling the ends and bolts.

Step 6, assembling the titanium side ring (S600)

Step 6 is a process of assembling each of the titanium side rings 340 into the inside of the outer drum 360 to be in close contact with the outer surface of each titanium lining 220 .

Step 7, non-ferrous metal side ring assembly step (S700)

Step 7 is a process of attaching each of the non-ferrous metal side rings 350 to the outer surface of each titanium side ring 340, and then bolting.

Although the above-described embodiment has been described with respect to a preferred embodiment of the present invention, the present invention is not limited thereto, and it is specified that it can be changed and implemented in various forms without departing from the technical spirit of the present invention.

100: cathode drum for electrolytic deposition 200: shaft
210: multi-axis 220: titanium lining
230: copper lining 240: round bar
300: negative drum 310: steel side plate
320: titanium side plate 330: steel bar
340: titanium side ring 350: non-ferrous metal side ring
360: outer drum 370: width limiting ring
400: wire C1, C2: contact

Claims (4)

A cathode drum for electrolytic deposition of a cathode including a shaft, a cathode drum coupled to the center of the shaft, and an electric wire for applying a current from the shaft to the cathode drum,
The shaft includes a multi-stage shaft including a large-diameter portion and a small-diameter portion provided on both sides of the large-diameter portion and having an outer diameter smaller than that of the large-diameter portion; Titanium linings provided in-line at both ends of the multi-speed shaft; a pair of copper linings provided in-line at the distal end of each titanium lining and provided with a high-conductivity gold plated layer forming a first contact point on an inner circumferential surface; and a pair of round bars provided to be inserted into the hollow portion of each copper lining;
The negative drum includes a pair of steel side plates having a fitting hole fitted on the outer circumferential surface of the small-diameter portion of the multi-short shaft in the center and disposed to be spaced apart from each other; A pair of titanium side plates provided with a fitting hole fitted to the outer circumferential surface of the titanium lining in the center and spaced apart from the steel side plate; a steel bar passing through the steel side plate to interconnect the pair of titanium side plates; a titanium side ring disposed in close contact with an outer edge portion of the titanium side plate; a non-ferrous metal side ring disposed in close contact with the outer surface of the titanium side ring; an inner drum disposed on the edge side between the titanium side plates, the inner circumferential surface of which is in close contact with the outer circumferential surface of the steel side plates, and having a second contact point through which current is conducted; and an outer drum disposed on the edge side between the non-ferrous metal side rings, the inner circumferential surface of which is in close contact with the outer circumferential surfaces of the titanium side ring, the titanium side plate, and the inner drum;
The electric wire further comprises connecting between the first contact point and the second contact point,
Cathode drum for electrolytic deposition.
The method according to claim 1,
The cathode drum for electrolytic deposition according to claim 1, further comprising a width limiting ring laminated on at least the outer circumferential surface of the non-ferrous metal side ring, the width limiting ring having an outer diameter larger than the outer diameter of the outer drum.
The method according to claim 1,
While interposed between the steel side plates, the cathode drum for electrolytic deposition further comprises a wire support ring for supporting the wire.
The method of assembling the negative electrode drum for electrolytic deposition according to any one of claims 1 to 3,
A steel side plate assembly step (S100) of fitting the fitting holes of each of the steel side plates to the outer peripheral surface of each small-diameter part of the multi-axis and fixing them by welding;
an inner drum assembly step (S200) of inserting the inner circumferential surface of the inner drum into close contact with the outer circumferential surface of the pair of steel side plates;
a steel bar assembling step (S300) of assembling the steel bar through the pair of steel side plates;
introducing the assembly in which the steel side plate, the inner drum and the steel rod are assembled into the outer drum (S400);
A titanium lining assembly step (S500) of inserting the fitting hole of each titanium side plate into the outer circumferential surface of each titanium lining, then inserting it into the outer drum, and assembling a bolt with the end of the steel rod;
A titanium side ring assembling step (S600) of assembling each of the titanium side rings into the inside of the outer drum, but in close contact with the outer surface of each of the titanium linings; and
Assembling a non-ferrous metal side ring assembly step (S700) of attaching each of the non-ferrous metal side rings to the outer surface of each titanium side ring, and then bolting them together (S700).

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