JPS5818998B2 - Anode body for plating - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in an anode body for plating, which includes a plurality of anodes supported by a conductive support.

It has been conventionally practiced to use a plurality of anodes to simultaneously plate the same number of objects as the anodes.

For example, as shown in FIG. 1, two parallel cylindrical anodes 11.1□ are supported by both poles of a conductive anode support 2 in a plating tank (not shown), and each of these anodes 11.
．． Cylinder 3, which is a cathode or object to be plated, is arranged concentrically around cylinder 12, and composite plating is applied to the inner peripheral surfaces of both cylinders 3 at the same time.

In this case, the lengths of the electrical paths from the power feeding section 4 provided at the center of the support 2 to the anodes 1□, 1□ are approximately equal, and therefore the electrical resistances of both types of paths are approximately equal.

As a result, the values of the currents flowing through both the anodes 11.1□ are set to 11 and 2, respectively.

The relationship l1=I2=1/2 (It + I2) holds true.

In other words, both mold flows 11 and 12 have the same value.

Therefore, the inner peripheral surface of each cylinder 3 corresponding to the anode 11, 12 is subjected to composite plating under similar conditions.

However, as shown in FIG. 2, when another anode 13 is supported at the center of the electrode support 2 and three cylinders 3 are subjected to composite plating at the same time, the anode 1 is removed from the power supply part 4 of the support 2. Although the lengths of the electric paths leading to □ and 1□ are equal to each other, the electric path from the power supply section 4 to the anode 13 is extremely short compared to both types of paths.

Therefore, the current flowing through the anodes 1□ and 1□ and the anode 1
As a result, the current flowing through the anode 11 is different in magnitude from the current flowing through the anode 11.
, 12 and the degree of plating progress in the cylinders 3 arranged around the anode 13 are different from each other.

In particular, when plating is performed by arranging ten or more anodes 1 in parallel as shown in FIG. Since the length of the electrical path from the power supply section 4 to the anode 1 differs greatly, there is a considerable difference in the progress of plating in the cylinders (not shown) disposed thereon.

In view of the above, an object of the present invention is to provide an anode body for plating that can uniformly plate a plurality of objects to be plated. In the anode body for plating, which is supported by a circular support, the support is formed in a circular shape, and a power feeding part is provided at the center of the support, and the power supply part is provided on the circumference of a circle centered on the center of the circular support. The anode body for plating is characterized in that each anode rod is arranged in the anode body.

The present invention will be described in detail below with reference to embodiments shown in the drawings.

FIG. 4 shows an embodiment of the present invention in which three anodes 1 are used.

In the anode body according to this embodiment, the three anodes 1 are positioned in parallel so that their upper ends form an interval of 120° on the same circumference, and the upper ends of each anode 1 are fed with power to the center. Part 4
It has a configuration in which it is supported by an electrically conductive disc-shaped support body 2 equipped with.

FIG. 5 shows an embodiment in which 12 anodes 1 are arranged, and in this case, the upper ends of each anode 1 are 300 mm apart from each other on the same circumference.
They are spaced at intervals of °.

According to the anode body configured as described above, the lengths of the electric paths from the power supply section 4 to the individual anodes 1 are all equal, so the electric resistances of these electric paths are equal.

Therefore, when plating is applied to an object to be plated, such as the cylinder 3 shown in FIGS. 1 and 2, arranged around each of the anodes 1, an equal current flows through each of the anodes 1, and as a result, The progress of plating on each of the objects to be plated is equal.

In this way, a plurality of plated products having uniform quality can be obtained at the same time.

The anode body according to the present invention can be effectively applied to plating not only the cylinder described above but also mechanical parts having a complicated structure.

For example, in a clutch housing having the structure shown in FIG. 7, a clutch plate (not shown) contacts each inner surface 6a of a large number of slits 6 provided on the outer periphery of the clutch housing. Composite plating is applied to the side surface 6a for the purpose of imparting wear resistance.

In such a case, as shown in FIG.
A plate-shaped anode 1' placed at a position corresponding to the slit 6 and the disc-shaped anode support 2 constitute an anode body, which is arranged in the form shown in FIG. By fitting into the clutch housing 5 and applying composite plating, an even composite plating layer can be formed on the inner surface 6a of each of the slits.

As described above, since the anode body for plating according to the present invention is capable of passing an equal current to a plurality of anodes, it is possible to apply uniform plating to the objects to be plated arranged on each of the anodes. It is possible to obtain plated products with consistent quality.

Further, the clutch housing and the like shown in the embodiments can also be plated with good quality.

[Brief explanation of the drawing]

1, 2, and 3 are perspective views conceptually showing an example of a conventional anode body having a plurality of anodes, and FIG.
Figure ■ is a plan view conceptually showing an embodiment of the present invention;
5 is a perspective view of the same, FIG. 5 1 is a plan view conceptually showing another embodiment of the present invention, ■ is a perspective view thereof, and FIG. FIG. 7 is a conceptual perspective view of another embodiment of the invention, FIG. 7 is a conceptual perspective view of the clutch housing, and FIG. 8 is a case in which the clutch housing is plated with the anode body shown in FIG. 6. FIG. 1.1'...Anode, 2...Anode support, 4...°. Power supply unit, 5...Kratschino Uzing, 6.
...Slit, 6a...Inner surface of the slit.

Claims (1)

[Claims] 1. In an anode body for plating in which a plurality of anode rods are supported by a conductive support, the support is formed into a circular shape,
An anode body for plating, characterized in that a power feeding part is provided at the center of the support, and each anode rod is arranged on the circumference of a circle centered on the center of the circular support.