JPS61266594A - Partial plating method - Google Patents

Abstract

PURPOSE:To simultaneously plate the required parts of a member of a complex shape by immersing part of a roll coated with a permeable substance in a plating soln., rotating the roll, and bringing the member into contact with the roll. CONSTITUTION:A prescribed cathode 2 is placed at the bottom of a plating tank 4 contg. a plating soln. 5, and part of a roll 3 coated with a permeable substance 6 such as sponge is immersed in the plating soln. 5. The roll 3 is rotated at 1-200r.p.m., a member 1 to be partially plated is brought into contact with the permeable substance 6 on the surface of the roll 3, and electric current is supplied to plate only the parts which are in contact with the substance 6 by electrolysis. The fresh plating soln. 5 is always fed to the surface of the roll 3, and plating giving high quality films is simply carried out with a small loss of the plating soln. 5.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for partial plating of parts using a plating solution.

[Summary of the invention]

The present invention is a method for partial plating parts using a plating solution, in which a permeable substance is attached to two surfaces, and a part of the part is immersed in the plating solution, and the part is brought into contact with a rotating roller. By doing so, even parts with complex shapes can be partially plated at the necessary locations at the same time.

[Conventional technology]

Conventionally, when plating a part of a part, etc., the part that is not to be plated is protected by masking it with a synthetic resin, etc., and then immersed in a plating solution and plated. In the past, plating was done by immersing a portion in a plating solution.

However, as described above, the method of protecting the unplated portion with a mask or the method of immersing a portion in a plating solution requires a lot of man-hours and makes the product expensive.

2. The plating range is unstable and it is impossible to plate minute parts.

There are other problems.

[Problems and objects to be solved by the invention]
It is intended to solve the above-mentioned problems, and is aimed at multiple locations such as protrusions and cross-sections of parts with complex shapes? Is there an economical and effective partial plating method for plating expensive precious metals at the same time? There is a lot to offer.

Means for Solving Problem C] The partial plating method of the present invention involves plating a part of a roller which is attached to a plating tank and has a permeable material attached to its surface and whose speed can be varied within a range of 1 to 200 depm. It is characterized by plating by immersing the parts in a liquid and bringing the parts into contact with the roller surface.

[Effect]

According to the method of the present invention, the plating quality is good because a fresh plating solution is constantly supplied to the roller surface, and the plating area is brought into contact with the roller, so it is simple and there is little loss of the plating solution.

〔Example〕

FIG. 1 is a sectional view showing an embodiment j of the present invention.

A plating tank 4 containing a plating solution 5 has a metal of the same type as the metal to be plated which will become the cathode 2, an insoluble metal such as platinum, or carbon attached to the bottom. A permeable material 6 such as cloth or trousers is attached to the surface of the roller 3.
It is connected to a motor whose rotational speed can be arbitrarily set within the range of pm, and is rotated by being attached to a mounting part (not shown).

Reference numeral 1 denotes a part to be plated, and by bringing it into contact with a permeable substance 6 attached to the surface of a roller 3 and electrolyzing the electrode by energizing it, partial plating can be applied only to the contact area.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to plate a large number of protruding parts and certain cross-sectional parts of complex-shaped parts at the same time without having to protect important parts with masks or the like. In addition, since the entire part is plated without being immersed in the plating solution, there is no leakage or contamination of the plating solution, which is particularly advantageous when using expensive plating solutions such as precious metal plating. It is effective.

[Brief explanation of drawings]

Figure 1 is a sectional view showing Embodiment 1 of the present invention. １＠・Parts 2...Cathode 3IIe*Roller 4...Plating liquid tank 5...Plating solution 6... Permeable substance that's all

Claims (1)

[Claims] It is attached to the plating tank and a permeable substance is attached to the surface.
A partial plating apparatus characterized in that a part of a roller capable of rotating at a variable speed within a range of 200 γ pm is immersed in a plating solution, and a part is brought into contact with the roller surface to perform plating.