JPS5871396A - Anode-current carrying structure in horizontal electroplating equipment - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an anode-conductor structure in a Fi horizontal electroplating apparatus, and relates to a 4IK sliding anode-conductor structure.

When a self-fusing anode is used in a structural electroplating device, it is usually operated in a stationary manner, but in a halogen type Suzmetuki line, etc., the operation is carried out with the anode sliding.

When using such a sliding type anode, there was a problem that the anode and the current-carrying body caused a 1ikML failure while sliding the anode, and sparks were generated between them. Also, it was difficult to slide the anode in parallel. It was difficult and had the disadvantage of creating a zigzag pattern.

The present invention has been made to improve these drawbacks, and is to provide an anode slide guide device *ft.
iihO This prevents poor contact and allows the anode to slide in parallel.

Embodiments of the present invention will be described below based on the drawings.

In Figure 3111, I/-m-C (7) is a plating tank, αp is a seal roll, (4) is a steel plate to be plated, 1 (1) is an anode, and (2) is a wire current carrying body. In this embodiment, - Guides (3 bars 3) for the development key lid are provided before and after the positive 1i (1). - This guide (3) (3) extends in the width direction of the plating tank. ), the anode (1) is attached to this guide (3
According to such a configuration, the anode (l) slides along the guide (bar 3JK).
) is guided by the anode (1
), and the current-carrying body (2), there is no contact failure or the like, and no sparks are generated. Further, the arrangement of the anodes (1) does not become zigzag.

FIG. 2 shows another embodiment of the present invention, in which a groove (4) with a rectangular cross section is formed in the anode (1) in the width direction of the plating bath. A circular current carrying body (25) is fitted into the groove (4), and the Q1 anode (1) slides along the current carrying body (2) K. Therefore, in this embodiment, the groove ( 4) and the current-carrying body (2) also serve as a guide mechanism.

In the embodiment shown in FIG. 3, similar to the embodiment shown in FIG. The structure is such that it serves both as a holding current carrying body and a guide ◎ Even if the slide guides of the above-mentioned embodiments are used, phenomena such as welding between the anode and the current carrying body may occur if the slide pitch of the anode exceeds 2 hours. occurs, and a spark is generated during the slide. FIG. 4 shows the relationship between this welding phenomenon and operating time. This graph shows ZnSO4: 50Gf
/L t PH=4 eCurrent density 60 A/dm” O
The welding phenomenon obtained under the plating conditions is caused by a decrease in the current-carrying area and a decrease in contact pressure, and this decrease in the current-carrying area also occurs in the gap between the contact area between the anode and the current-carrying body. For alloy plating baths that form an oxide film or an anion complex, this is due to the precipitation of metal oxides due to depolarization.

The risk of preventing welding between the anode and the current-carrying body, which can cause sparks if the slide pitch exceeds 2 hours, is to ensure that the structure of the guide mechanism is such that the anode and the current-carrying body have a high contact pressure and a high contact surface. ◎＠＠The figure shows an example for the purpose of preventing such welding, in which a groove (4) with a triangular cross section is formed in the anode (1) in the plating bath. Form this groove in the width direction.
- The current carrying body 4 also has a protrusion (3) with a triangular cross section, and this central part 410 is fitted with a groove (45K). ) and
(4) contacts under high pressure and the contact area becomes large, so in alloy plating baths where oxide films are formed in the gaps between the contact surfaces and complexes of 7 ions are formed, depolarization occurs. Precipitation of metal oxides can be prevented. Therefore,
It is also possible to suppress sparks caused by sloshing. In this embodiment, the current-carrying body (
A nozzle (5) is provided near the contact part of the
A jet of plating solution is applied to the contact portion from the contact point 5, thereby further preventing the depolarization phenomenon described above.

As described above, in the single VSO anode-conductor structure, since a mechanism is provided to guide the anode when sliding the anode, the anode slides smoothly and in parallel. This prevents accidental contact between the anode and the current-carrying body.
Sparks that occur between these can be prevented.
Since the next slide is performed in parallel, the arrangement of the anodes is not disturbed, which has the following effects.

[Brief explanation of drawings]

Fig. 1 is a front sectional view showing one embodiment of the anode-current carrying body structure of the present invention, 11X2m is a front sectional view showing another embodiment, and Fig. 3
The figure is a front sectional view showing still another embodiment, FIG. 4 is a diagram 27 showing the relationship between operating time and occurrence of welding, and FIG. 5 is a front sectional view showing still another embodiment. (1)...anode, (2)<2J<I>...current carrying body,
(3 bars...Guide% (4) (4)...Groove, (5)
...Nozzle, ■...Protrusion. Patent applicant Nippon Kokan Co., Ltd.

Claims (1)

[Claims] 1. An anode-current carrying body structure in an overflow electroplating apparatus characterized by having a guide mechanism for sliding the anode when sliding the anode.