JPS6221878B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a barrel device for plating a barrel.

An example of a conventional barrel plating device is as shown in FIG. 1, in which a barrel 1 contains an electrode lead 2a and a cathode plating electrode 2 fixed to the tip thereof. As the motor 3 rotates, a gear 6 fixed to the body of the barrel 1 rotates via gears 4 and 5, and the barrel 1 rotates. When the part to be plated is a thin precision part, deformation may occur due to the clean part becoming entangled with the above-mentioned plating electrode 2 or the electrode lead 2a being sprung while the barrel 1 is rotating. It was hot.

The present invention solves these drawbacks in the conventional example.

Next, embodiments of the present invention will be described.

In FIG. 2, the body 8 of the barrel 7 has a hexagonal shape and is provided with a number of small holes 9 to allow the plating liquid to enter the barrel. The above-mentioned 10 is fixed to the side surface of this barrel 7. The rotation of the motor 11 is transmitted to the gear 10 via gears 12 and 13, causing the barrel 7 to rotate. Barrel 7 has bearings 14 and 15
It is rotatably supported by the frame 16. The electrode lead 17 is connected to an electrode lead 20 via an electrode bearing 19 in a sealed chamber 18, and this electrode lead 20 is divided into four parts and connected to four plating electrodes 21. These plating electrodes 21
is embedded in the inner surface of the barrel 8, and its surface is flush with the inner surface of the barrel 7, so that no protrusion is formed. Barrel 7 as mentioned above
The body has a hexagonal shape, and the plating electrodes 21 are fitted into two pairs of opposing faces, that is, four faces. Note that although the electrode lead 20 rotates as the barrel 7 rotates, the rotation is not transmitted to the electrode lead 17 due to the electrode bearing 19. Since this electrode bearing 19 cannot be immersed in plating liquid, it is kept in a closed chamber 18.

When plating precision parts for watches using such a barrel device, the deformation defect rate was 0.5%. When the same part was plated using the conventional apparatus shown in Figure 1, the deformation failure rate was 5%.

In addition, in the above-mentioned embodiment, 4 of the hexagonal barrels are
Electrodes for plating are provided on the surface, but other polygons,
Alternatively, even if a cylindrical barrel is used, it goes without saying that plating electrodes may be similarly provided at appropriate locations.

Furthermore, in the embodiment shown in FIG. 2, since the plating electrode is structured to rotate, an electrode bearing 19 is used to prevent the rotation of the electrode lead 20 from being transmitted.
Alternatively, as shown in the third figure, mercury 23 may be placed in the sealed chamber 22 to establish electrical connection between the electrode leads 17 and 20.

In the barrel device according to the present invention having the above-described structure, since there are no protrusions or the like protruding inside the barrel, it is possible to reduce the occurrence of deformation defects in the product to be plated.

Furthermore, by embedding a mesh-shaped plating electrode, it is possible to reduce the amount of plating material such as gold or silver that adheres to the electrode.

[Brief explanation of the drawing]

FIG. 1 is an explanatory cross-sectional view of a conventional method, FIG. 2 is an explanatory cross-sectional view of an embodiment of the present invention, and FIG. 3 is a cross-sectional view showing another rotational connection mechanism for electrode leads. 7... Barrel, 8... Body, 21... Electrode for plating.

Claims (1)

[Claims] 1. A barrel plating device for plating a barrel, characterized in that a mesh-shaped plating electrode is embedded in the inner surface of the body of the barrel, so that the surface of the plating electrode is flush with the inner surface of the barrel body.