JPS6028920B2 - Horizontal electroplating equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a continuous horizontal electroplating installation equipped with a self-fusing anode device for continuously electroplating metals such as zinc onto the surface of metal strips.

Continuous horizontal electroplating equipment equipped with this type of soluble anode device normally introduces a plating tank 1 and a metal strip A into the plating tank 1 continuously, as shown in Figure 1, and exits the tank after plating. Seal roll 2 and plating tank 1
An anode electrode 3 for electroplating the surface of the metal strip in the bath, a current-carrying rod 5 for supporting and energizing the anode electrode, and a conductor roll 6 for negatively charging the metal strip at the entrance side of the bath. It is configured.

When the anode electrode 3 is an eye-soluble anode electrode, the anode electrode part 30 is made of the same type of metal as the plated or metal as shown in FIG.
The metal strip is divided into a plurality of pieces, and a plurality of pieces are placed in contact with the current-carrying bar 5 so as to be located in the middle of the metal strip.
In this case, handles 4 are formed on the shoulder portions of both ends of the upper anode electrode member 3, and the upper anode electrode member 3 is suspended and supported in contact with two current-carrying rods 5. The lower anode electrode member is supported so as to be in contact with two energizing rods 5 placed in the money bath.
The split-type easily soluble anode electrode member 3 differs slightly depending on the usage conditions, but for example, when performing electrolytic zinc plating, 70
A plurality of prismatic columns each having a size of 0 (length) x 50 (medium) x 60 to 100 ribs (thickness) are arranged and supported on a current-carrying rod so as to be applied in the metal strip (600 to 230 ribs). The anode electrodes configured in this manner are arranged in two to three groups in one plating tank along the running direction of the metal strip.

In a practical line, this plating tank is usually connected in series from 7 to 7 times.
1 position is provided. Such self-fusing anodes consume about 1 side/2 hr of thickness in practical electrogalvanizing lines, but due to non-uniformity of elution, etc.
The reality is that all self-fusing anode electrode members are replaced every ~12 Mr.

The replacement work for these self-fusing anodes is usually done manually because the work is done inside the plating bath, which is not only complicated but also takes a long time. This is a major problem when performing electroplating. One object of the present invention is to easily replace the self-fusing anode member, which is a problem when performing continuous horizontal electroplating using the above-mentioned self-fusing anode electrode. It is an object of the present invention to provide electroplating equipment that can minimize the time required for these processes.

Furthermore, when performing electroplating using an eye-soluble anode electrode,
It is necessary to uniformly elute the plating and metal from the surface of the self-soluble anode electrode, but 02 gas is generated on the surface of the self-soluble anode electrode. The 02 gas adhering to the surface of the positive anode locally passivates the surface, thereby inhibiting plating and metal elution from the surface of the positive anode.

Therefore, it becomes difficult to control the concentration of the metal during plating, and as a result, there are problems such as the inability to uniformly plate the metal strip, and this is an attempt to solve this problem.
Still another object of the present invention is to provide electroplating equipment that can uniformly elute plating and metal from the surface of a self-fusing anode electrode during electroplating.

This invention was made in order to solve the above problems of the present invention, and includes an energizing belt for supporting the anode electrode, which is arranged endlessly so as to almost intersect with the metal strip passing through the plating bath at predetermined intervals. , a split-type easily soluble anode electrode member detachably attached to the nuclear belt, a pair of belt wheels that support and rotate the nuclear belt, a drive mechanism that drives the nuclear belt wheels, and a type that contacts the nuclear belt. The basic feature is that a conductive layer is attached to a plating bath.

The present invention will be explained below with reference to embodiments of the drawings.

As shown in the schematic side view of FIG. 3, the horizontal electroplating equipment to which this invention is applied is arranged so that a metal strip A As the metal strip A passes through, the surface of the metal strip A is plated.

At both ends of the metal strip A in the plating tank 11 in the advancing direction,
A pair of sealing rolls 13 are provided, each of which allows the metal strip to pass through. Further, a conductor roll 14 is provided on the entrance side of the plating bath 11 in order to negatively charge the metal strip. The self-soluble anode electrode of this invention is
As shown in FIGS. 3 and 4, the self-fusing anode electrodes 12 arranged at intervals on the metal strip A are connected to an endless current-carrying belt 15 by a split type lacquer anode electrode member I20. It is supported in contact with the top. The pair of belt wheels 16 that rotate the endless energized belt 15 are as follows:
It is a wheel-type belt pulley that makes contact only near both ends of the core belt. This is to prevent the self-binding anode electrode member 120 attached to the inside of the current-carrying belt from coming into contact with the belt pulley 16 when passing through it. The belt pulley 16 contacts only the vicinity of both ends of the current-carrying belt 15, and a predetermined gap is formed between the self-fusing anode electrode member 120 and the shaft 18 of the belt pulley 16. Belt wheel 16 Bevel gear 1 provided at both ends
It is connected to a drive shaft 20 that hangs down from above the plating tank via a shaft 9 . Electricity is supplied to the current-carrying belt 15 continuously by means of a rotating current-carrying belt 151 using a contact-type conductive device 22 such as a carbon brush. In FIG. 3, this is done near both ends of the belt. In addition, numeral 17 in the figure is a tension adjustment roll for the energized belt, which can be raised and lowered. Further, 21 is a bearing, and 23 is a haze electrode shield and plate for preventing plating on the end of the metal strip. An example of attachment and detachment of the self-fusing anode electrode member 120 to and from the current-carrying belt and its shape are shown in FIGS. 5, 6, and 7.

FIG. 5 is a detailed view of one section of the endless current-carrying belt 15, spaced apart from and substantially perpendicular to the metal strip. Here, endless energized belt 1
A plurality of open square portions 24 are provided in the central portion of the belt 5 at intervals along the longitudinal direction of the belt to the extent that strength is not lost. Further, near both ends of the current-carrying belt 15, through holes 25 are provided to engage with the convex portions 160 of the belt pulley 16. 6th
The figure is an enlarged detailed view showing an example of a device including a current-carrying belt and a dissolvable anode electrode member 120. FIG. 7 is a perspective view showing an example of the self-lacquering anode electrode member 120. A split-type eye-soluble anode electrode section 120 having a shape as shown in FIGS. 6 and 7 is attached to the belt opening 24. As shown in FIG.

In this case, the self-fusing anode electrode section 120 is connected to the current-carrying belt 15
The length L of the split-type eye-soluble anode electrode member 120 is made longer than the horizontal length W of the closing portion 24 of the anode member 120, and the shoulder portions at both ends thereof are provided with groove portions 26 that compete with the inner edge of the entrance portion of the energizing belt 15. . Therefore, the self-portable anode electrode member can be easily attached or removed through this closing portion 24 by hand or using a jig or the like. Next, a specific example will be described in which electroplating is performed using the electroplating equipment according to the present invention.

The electrode members shown in FIGS. 5, 6, and 7 were used. The energizing belt is made of Ti with a diameter of 70 mm and a thickness of approximately 1 mm.
A type alloy plate was used. Self-fusing anode electrode member is 500 x 50
×30 (thickness) side, and grooves with a height of 23 ribs and a height of 13 (medium) and 20 (depth) (depth R = 8) were formed on both ends of the upper part as shoulders. It was manufactured by casting plated metal into a mold. The weight of the electrodes in this case was 5 to 6k9/piece, and the electrodes were sequentially attached at high positions on the upper side while manually rotating the energizing belt little by little. For electroplating, use 30A/1 as an anode electrode.
Electrolysis was carried out as dm2, during which time the energizing belt was slowly and continuously rotated.

By arranging a plurality of anode electrode members 5 on either side, it was possible to rotate smoothly without applying any force when passing through a belt pulley. The consumption of the anode electrode is 25m/
This was done to a thickness of m, and the remaining 5 ribs were discarded. When used for longer than that, the contact with the current-carrying belt mainly utilizes the weight of the self-fusing anode electrode member, so if it becomes too thin, the contact will be affected by the liquid flow of the tsuki-solution, etc., and the contact will deteriorate. become.

After that, the self-soluble anode electrodes were replaced manually, but each one is light and easy to handle, and they can be removed and installed in a single position, making the work extremely easy. As a result, the replacement time per tank could be shortened to 1/6 to 1/10 hr compared to a conventional tank.

In addition, since the self-fusing anode electrode member does not need to change its shape depending on the upper and lower sides of the metal strip, it is reasonable to have a small amount of inventory. In addition, in the present invention, the anode electrode is constantly moving due to the rotation of the belt, so even if there are bubbles of 02 gas on the surface of the anode electrode, the nuclear bubbles will be removed as a counter electrode of the metal strip and go around the belt wheel. Since it is removed almost cleanly, there is no passivation and the elution can be carried out uniformly.

Therefore, while the secondary self-fusing anode electrode member is discarded with approximately 30 to 4 pieces remaining, only about 5 pieces are left.
Therefore, it is not necessary to increase the thickness of the self-fusing anode electrode to be efficient. This is particularly a contributing factor to ease of handling. In addition, although the above description has been mainly made of electrolytic galvanizing, it goes without saying that this is applicable not only to zinc but also to any material that can use a self-fusing anode electrode such as Sn. In the present invention, the case has been described in which the anode electrode member is attached to the inside of the energized belt, but it is also possible to mount the anode electrode to the outside of the energized belt and run a metal strip on the outside of the energized belt. In some cases, it can be applied to single-sided electroplating.

Furthermore, the attachment of the self-fusing anode electrode member to the current-carrying belt is not limited to the method described above, and simple fixing may be used, but it is more practical if simple physical attachment as described above is possible. It is true.

As described above, the present invention has encountered a major problem when electroplating the surface of a metal strip using an easily soluble anode electrode in a horizontal electroplating facility. By making it possible to easily attach or remove the nuclear electrode member from the current-carrying belt, this will reduce the time required to replace the nuclear electrode, and at the same time prevent localized passivation on the surface of the anode electrode, preventing plated metal. It has excellent effects such as uniform elution and effective use of the self-fusing anode electrode member.

[Brief explanation of the drawing]

FIG. 1 is a schematic side sectional view of a conventional horizontal electroplating equipment, FIG. 2 is a sectional view taken along the line X-X in FIG. 1, FIG. 3 is a side sectional view showing an embodiment of the present invention, and FIG. The figure shows Y in Figure 3.
FIG. 5 is a perspective view showing one embodiment of the configuration of an electrode member and a current-carrying belt, FIG. 6 is a side view thereof, and FIG. 7 is a perspective view of the electrode member. 11... Plating tank, 12... Self-fusing uniform anode electrode, 1
3... Seal roll, 14... Conductor roll, 15...
・Electricity belt, 16... Belt wheel, 17... Tension adjustment roll, 18... Shaft, 19... Bevel gear, 20...
Drive shaft, 21... Bearing, 22... Conductive equipment, 23.
・Raikoku Shiyahesh, board, 24...opening part, 25...
Through hole, 26...groove. Figure 1 Figure 2 Figure 3 Figure 4 Figure 6 Figure 5 Figure 7

Claims (1)

[Claims] 1. An energizing bell for supporting the anode electrode arranged endlessly at predetermined intervals and almost orthogonal to the metal strip running through the plating tank, a pair of belt wheels that support and rotate the core bell, and a drive for driving the core belt wheel. Horizontal electroplating equipment characterized by having a mechanism and a contact-type conductive device for a nuclear belt attached to a plating tank.