JPH05132795A - Partial plating apparatus - Google Patents

Abstract

PURPOSE:To efficiently applying partial plating with uniform thickness to an area requiring plating at low cost and to improve the productivity, as for a partial plating apparatus of a pinch brush system. CONSTITUTION:The plating head part 6 of a partial plating apparatus, in which prescribed plating treatment is executed to an area requiring plating in the member to be plated formed on a hoop material in such a manner that the above hoop material is moved in a state in which it is brought into contact with a net wetted by a plating liq. discharged from a fixed nozzle, is constituted of a plating head 61 having a recessed part 61b connected to a nozzle 61c, a porous elastic sheet 62 fitted to the recessed part 61b and plural plating nozzles 63 formed by individually rolling and coating plural anode rays 63b diverged parallel from an anode 63a from the free edge to a length at which they can be inserted into the recessed part 61b with the net 63c. The plural plating nozzles 63 are disposed in such a manner that they are brought into contact with the surface of the porous elastic sheet 62 fitted to the recessed part 61b of the plating head 61.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pinch brush type partial plating apparatus for performing partial plating processing on a member to be plated formed on a hoop material, and particularly to a partial plating processing of uniform thickness in a required plating area. The present invention relates to a partial plating device that improves productivity by applying it efficiently and inexpensively.

In the process of manufacturing a tongue-shaped connection terminal such as a connector terminal, for example, an electrode film for improving connection characteristics in a required region of a connection terminal base material formed continuously on a strip-shaped hoop material in a comb blade shape. The means for forming a continuous partial plating method is often used.

Various methods have been put into practical use as means for performing such partial plating treatment, and one of them has been moved by contacting a member to be plated with a net moistened with a plating solution having a potential. There is a system (pinch brush system) in which a required plating treatment is continuously applied to the plated member.

[0004]

2. Description of the Related Art In the drawings, as an example, a case where a member to be plated is a connector terminal continuously formed in a comb shape like a hoop material, and a part of its free end side is plated with gold (Au) will be described.

FIG. 2 is a diagram showing a required plating area of a member to be plated, FIG. 3 is a conceptual diagram for explaining a conventional partial plating apparatus and its plating method, and FIG. 4 is a diagram for explaining problems. In FIG. 2, a comb blade-shaped terminal member 1a, which is connected to the hoop material 1 by a connecting portion 1'and is bent and protrudes to one side, is punched and formed at a constant pitch interval p by, for example, a continuous press machine.

A shaded area A on the curved outer surface side represents a required gold (Au) plating area. FIG. 3 shows an apparatus and a plating method for applying a plating treatment to the terminal member 1a of the hoop material 1, (3-1) is a perspective external view showing a plating head portion as a main part of the apparatus, and (3-2) is a perspective view thereof. FIG. 3C is a sectional view of the plating head section viewed from the direction of arrow B, and (3-3) is a view showing a state during plating.

In (3-1) and (3-2) of the figure, in the plating head section 2 of the partial plating apparatus relating to the present invention, the width direction orthogonal to the longitudinal direction of the upper surface is the terminal member 1a explained in FIG. Of the slit-shaped nozzle for discharging the plating liquid on the center line in the width direction, which is formed on the concave curved surface 21a according to the curvature of the required plating surface side.
21b, and the nozzle 21b of the space 21 'formed inside the plating head 21.
From the Saran resin fiber attached to the plating head 21 so as to cover the anode 22 made of a platinum (Pt) rod or the like arranged along the longitudinal direction in the vicinity of and the outer surface including the curved surface 21a of the plating head 21. And a saran net 23 in the form of a woven fabric.

In this case, the space 2 of the plating head 21
When a plating solution 3 such as a cyan-gold solution is injected as shown by an arrow C from a plating solution supply unit (not shown) at 1 ', the plating solution 3 with the anode 22 wound therein is discharged from the slit-shaped nozzle 21b. The upper part of the nozzle 21b of the plating head 21 is covered with the above-mentioned saran net 23 having chemical resistance.

Therefore, the plating liquid 3 discharged from the nozzle 21b wets the saran net 23 while the saran net 23 is being wetted.
It flows down 23 and flows down from both sides of the plating head 21.
On the other hand, the hoop material 1 has its terminal member 1a as the plating head.
When the plating head 21 is set so as to match the curved surface 21a of 21, the terminal member 1a is set on the plating head 21 via the salan net 23 as shown in (3-3). The net 23 is wet with the plating solution 3 as described above.

Therefore, the hoop material 1 at ground potential is applied to the anode 22 by a moving mechanism (not shown) in the longitudinal direction "(3-3)" while a potential of about several V is applied from a controller (not shown). By moving in the thickness direction ", the required gold plating treatment can be performed on the required plating area of the terminal member 1a, that is, the area A described in FIG. 2, due to the potential difference between the hoop material 1 and the plating solution 3.

The roller 4 arranged at the base side of the terminal member 1a, that is, on the side of the connecting portion 1 ', has the curved surface 21a of the plating head 21 in the curved plating required area A of each comb-shaped terminal member 1a. It is for pressing with a constant pressure, and is configured to be freely rotatable with the movement of the hoop material 1 in the longitudinal direction.

Therefore, even when the plurality of comb-shaped terminal members 1a are bent or tilted, the required plating area of each terminal member 1a is curved through the net 23 to the curved surface.
21a can be brought into close contact and efficient plating processing work can be realized.

[0013]

However, in the partial plating apparatus having such a configuration, the nozzle 21b at one location near the anode is provided.
The salan net 23 is wetted with the plating liquid 3 discharged from the above to supply the plating liquid 3 to the required plating area A of the terminal member 1a.

This means that as the distance from the nozzle 21b increases, the supply amount of the plating solution 3 decreases, and at the same time, the distance from the anode increases, so that the wetting degree of the saran net 23 decreases and the current density decreases. And
As shown in FIG. 4A, in the required plating area A of the terminal member 1a, the plating thickness becomes thicker in the central portion closer to the nozzle 21b as indicated by a.

The upper surface of the plating head 21 is formed into the concave curved surface 21a as described above, which means that the plating solution 3 is likely to collect on the curved surface 21a. Therefore, as shown by b in FIG. 4 (b), the plating liquid 3 that has flowed from the gap between the adjacent terminal members 1a to the back surface side of the terminal member 1a is applied to the back surface side of the terminal member 1a which is a plating unnecessary area. Will also be plated.

Further, the concave curved surface of the plating head 21.
21a must be formed according to the required plating area of the target plated member. Therefore, as a result, there is a problem that it is not possible to perform a plating treatment with a uniform thickness over the entire required plating area. In addition, a plating treatment may be performed up to the unnecessary plating area, or the plating head may be adjusted according to the target plating member. There was a problem that productivity could not be expected to improve due to the need to prepare.

[0017]

SUMMARY OF THE INVENTION The above object is to provide a slit-shaped nozzle along a longitudinal direction of the hoop material of a fixed plating head in a required area on one side of a member to be plated formed in a comb shape on the hoop material. In a partial plating device that moves in the longitudinal direction of the hoop material while in contact with a net moistened with a plating solution having a higher potential than the hoop material discharged from The plating head portion, which is in contact with the required plating area of the member to be plated, has a concave portion having a peripheral wall of a predetermined height formed on the upper surface, and a slit-shaped nozzle is formed on the center line of the concave portion along the longitudinal direction. Plating head, a porous elastic plate having a thickness lower than the height of the peripheral wall to be fitted and mounted in the recess of the plating head, and a width of the anode connected to the control unit and orthogonal to the nozzle of the recess. With a plurality of plating nozzles formed by individually winding-coating a plurality of anode wires branched in a direction parallel to the nozzle within the range from the free end to a length that can be fitted in the recess with a net. This is achieved by a partial plating apparatus configured so that the plurality of plating nozzles are arranged so as to contact the surface of the porous elastic plate located in the recess of the plating head.

[0018]

When the plating head is constructed so that the curved surface located on the upper surface of the plating head can be displaced in accordance with the curvature of the required plating area of the member to be plated and the anode is arranged in a wide area, It is possible to suppress both the variation in the plating thickness within the required plating area and the adhesion of the plating to the unnecessary plating area described above, and to eliminate the trouble of changing the plating head for each target member to be plated.

Therefore, in the present invention, after the porous elastic plate is attached to the nozzle opening surrounded by the peripheral wall, the surface of the elastic plate is covered with the saran net explained in FIG. The partial plating apparatus is configured by replacing the conventional plating head section with the plating head section configured by arranging a plurality of anode wires having free ends in parallel.

In this case, the plating solution discharged from the nozzle flows out from the upper side of the peripheral wall while wetting the saran nets covering the plurality of anode wires while being diffused by the porous elastic plate. Since the one end of the anode wire covered with the saran net is a free end, the anode wire can be displaced while pressing the porous elastic plate, following the shape of the member to be plated in contact with the saran net.

Further, a plurality of anode wires arranged in parallel can form an anode having an area spread, and the distance between each anode wire and the plating member can be made constant at all times.
Therefore, it is possible to perform the plating process with a uniform thickness over the entire required plating area, and to suppress the plating process on the back side of the plating member and improve the productivity by generalizing the plating head.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a diagram for explaining a configuration example of a partial plating apparatus according to the present invention, (1-1) is a perspective external view showing a plating head portion, and (1-2) is an arrow showing the plating head portion. A cross-sectional view seen from the direction B, (1-3) shows the state during plating.

Since the terminal member 1a described in FIG. 2 is the member to be plated in the drawing, the same reference numerals are given to the same target members as in FIGS. 2 and 3. (1-1) in the figure,
In (1-2), the plating head portion 6 of the partial plating apparatus 5 relating to the present invention is provided with a recess 61b having a peripheral wall 61a on the upper surface and a slit-shaped nozzle 61c formed on the longitudinal centerline of the recess 61b. A plating head 61, a sponge rubber plate 62 fitted and mounted in the recess 61b of the plating head 61, and an anode 63 connected to a control unit (not shown).
The saran net described in FIG. 3 is from the free end of a plurality of anode wires 63b branched in parallel to each other within the width of the recess 61b (five in the figure) to the recess 61b. 63c and a plurality of plating nozzles 63 formed by individually winding coating.

The region branched from the anode 63a to the anode wire 63b is covered with a cover 63d made of an insulating material so that the member to be plated does not come into contact with the anode wire 63b.
The upper surface 61a 'of the peripheral wall 61a of the plating head 61 is set at a position slightly higher than the anode wire 63b when the plating nozzles 63 are placed on the sponge rubber plate 62,
The surface connecting the outermost diameter lines of the plating nozzles 63 is the peripheral wall 61 described above.
It is located higher than the upper surface 61a 'of a.

When the plurality of plating nozzles 63 are placed together with their respective free ends so as to come into contact with the upper surface of the sponge rubber plate 62 fitted in the recess 61b of the plating head 61.
It will be in the state shown in (1-1), but each plating nozzle in this case
Since 63 is connected to the anode 63a only at one end of the anode wire 63b buried in each central portion, the upper surface of the sponge rubber plate 62 can be pressed down individually by pressing from above.

Therefore, when a plating solution 3 such as a cyan gold solution is injected as shown by an arrow C into a space 61c 'provided under the nozzle 61c of the plating head 61 from a plating solution supply unit (not shown) as in FIG. The plating liquid 3 discharged from the nozzle 61c is diffused and absorbed by the sponge rubber plate 62 as shown by an arrow D, and then flows out from the upper surface 61a 'of the peripheral wall 61a of the plating head 61. Each of the coated plating nozzles 63 is also wetted with the plating solution 3 together with the anode wire 63b.

When the hoop material 1 is pressed against the upper surface of each plating nozzle 63 together with each terminal member 1a, the plural plating nozzles 63 follow the curvature of the terminal member 1a as shown in (1-3). Although the sponge rubber plate 62 is displaced while being pushed down, the space E between the adjacent nozzles 63 is filled with the plating solution 3 as a pool of the plating solution, so that the entire surface of the terminal member 1a required for plating is plated. At the same time as it is covered with, the wraparound of the plating solution to the back surface side of the terminal member 1a is suppressed, so that the back surface side is not covered with the plating solution.

Therefore, after a potential of about several V is applied to each anode wire 63b from a control unit (not shown) through the anode 63a, the hoop material 1 at ground potential is plated as shown in (1-3). By moving it in the longitudinal direction, that is, in the thickness direction of the paper in (1-3) by a moving mechanism part (not shown) while pressing it against the upper surface of the nozzle 63, the hoop material 1 and hence the terminal member 1a and the plating solution 3 are moved. The required gold plating treatment can be applied only to the required plating area (area A in FIG. 2) of the terminal member 1a due to the potential difference.

The roller 4 arranged on the base side of the terminal member 1a is the one described with reference to FIG. In the partial plating apparatus 5 having the plating head portion 6 having such a configuration, since the plurality of plating nozzles 63 are displaced in accordance with the curvature of the plating member, it can be applied to a member to be plated having any curvature. Since the anode wire located close to the plating member is arranged with an area spread, it is possible to easily realize a partial plating apparatus capable of performing a plating treatment with a uniform thickness only in a required area.

[0030]

As described above, according to the present invention, it is possible to provide a partial plating apparatus which improves the productivity by efficiently and inexpensively performing the partial plating treatment with a uniform thickness on the required plating area.

In the above embodiment, the case where the outer surface of the terminal base material, which is formed by bending the hoop material into a comb-like shape, is plated, is used as an example. However, even when the curved inner surface is plated. Alternatively, the same effect can be obtained even when one surface of the straight terminal base material is plated.

Further, in the case where the plating thickness in the required plating area is partially different, there is also an advantage that it can be easily realized by changing the length of the corresponding plating nozzle including the anode wire of the corresponding plating nozzle. is there.

[Brief description of drawings]

FIG. 1 is a diagram illustrating a configuration example of a partial plating apparatus according to the present invention.

FIG. 2 is a diagram showing a required plating area of a member to be plated.

FIG. 3 is a conceptual diagram illustrating a conventional partial plating apparatus and a plating method therefor.

FIG. 4 is a diagram illustrating a problem.

[Explanation of symbols]

1 Hoop material 1a Plated member (terminal member) 3 Plating liquid 4 Roller 5 Partial plating device 6 Plating head 61 Plating head 61a Peripheral wall 61a 'Upper surface 61b Recess 61c Nozzle 61c' Space 62 Porous elastic plate (sponge rubber plate) 63 Plating nozzle 63a Anode 63b Anode wire 63c Net (Saran net) 63d Cover

Claims (3)

[Claims] 1. A required area for one-sided plating of a member to be plated formed in a comb shape on the hoop material is higher than the hoop material discharged from a slit-shaped nozzle of the fixed plating head portion along the longitudinal direction of the hoop material. A partial plating apparatus for performing a predetermined plating treatment on the required plating area by moving the hoop material in the longitudinal direction in a state of being in contact with a net wet with a plating liquid having an electric potential. ), The plating head part (6) that comes in contact with the required plating area has a recess (6) having a peripheral wall (61a) of a predetermined height on the upper surface.
1b) and a slit-shaped nozzle (61c) is formed on the center line of the recess (61a) along the longitudinal direction, and the recess (6) of the plating head (61).
Within the range of the width perpendicular to the nozzle (61c) of the recess (61b) from the porous elastic plate (62) having a thickness lower than the height of the peripheral wall to be fitted and mounted in 1b), and the anode (63a) connected to the control unit. nozzle
A plurality of anode wires (63b) branched parallel to the direction parallel to (61c) are individually wound and covered with a net (63c) from the free end to a length that allows them to fit in the recesses (61b). It is composed of a plurality of formed plating nozzles (63), and the plurality of plating nozzles (63) come into contact with the surface of the porous elastic plate (62) located in the recess (61b) of the plating head (61). A partial plating device characterized in that it is arranged as described above. 2. A partial plating apparatus characterized in that the porous elastic plate fitted and mounted in the recess of the plating head according to claim 1 is made of a sponge rubber plate. 3. A partial plating apparatus, wherein the net for winding-coating the anode wire according to claim 1 is a woven cloth-like saran net made of saran resin fiber.