JPH0213037B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a plating solution cleaning and recovery method for an automatic partial plating device, and particularly to a plating solution cleaning and recovery method that improves recovery efficiency in the next step, for example, by using an electrolytic method. .

2. Description of the Related Art Items to be processed, such as connector contacts for electronic exchanges, are generally gold-plated because high reliability is required. However, applying gold plating to the entire surface of the connector contact increases the proportion of gold in the cost of the connector. Therefore, surface automatic partial plating is generally performed to minimize the gold plating of the connector contacts to the necessary minimum. FIG. 1 shows a side sectional view of a plating liquid cleaning and recovery tank of such a conventional automatic partial plating apparatus.
In the figure, 1 is a gold plating liquid collection tank made of synthetic resin, etc., 2 is a workpiece such as a connector contact for an electronic exchange, 3 is a residual gold plating liquid adhering to a part of the workpiece 2, and 4 is a gold plating liquid collection tank made of synthetic resin, etc. A nozzle 6 for injecting water 5 is a water supply pipe connected to the nozzle 4.

In this configuration, the workpiece 2 that has completed the final plating process, for example, a connector contact for an electronic exchange, is moved and guided to the gold plating liquid cleaning recovery tank 1, and the workpiece 2 is moved into the gold plating liquid cleaning recovery tank 1.
The remaining plating liquid 3 adhering to the plate is cleaned. However, in such a conventional cleaning and recovery method, the remaining gold plating solution 3 adhering to the workpiece 2 is washed from both sides with a large amount or a small amount of water 5 through the nozzle 4. There is a problem that the remaining gold plating solution 3 becomes diluted, reducing the efficiency of electrolytic recovery in the next step, and with a small amount of water 5, there is a problem that the gold plating solution is carried out due to wetting unnecessary parts due to full-surface cleaning, resulting in loss. Ta.

The purpose of the present invention was to solve the above-mentioned problems, and the purpose of the present invention is to clean only the minimum necessary surface with a small amount of water, thereby diluting the remaining gold plating solution and removing the gold plating solution by wetting unnecessary parts. The present invention provides a novel plating solution cleaning and recovery method that suppresses losses due to removal and improves the recovery efficiency of the gold plating solution. In order to achieve the above-mentioned object, the present invention provides a method for cleaning and recovering residual plating solution adhering to a workpiece whose protruding parts have been plated by an automatic partial plating apparatus, in which the protruding parts of the workpiece are The cleaning water is supplied to the cleaning container whose at least one side is cut below the position of , and overflows at the cutting part, so that the cleaning water swells only on one side of the object to be treated at the cutting part. The plating solution is brought into contact with the surface of the water for cleaning, and the plating solution after cleaning is collected in a collection tank.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the plating liquid cleaning and recovery method according to the present invention will be described in detail below with reference to the drawings.

FIG. 2 is a side sectional view for explaining one embodiment of the present invention, in which the same parts as in the previous figure are given the same reference numerals, and 7 is a gold plating liquid recovery tank made of synthetic resin or the like; Reference numeral 8 designates a cleaning container made of a cylinder made of synthetic resin or the like and having a stepped cutting portion 81 formed therein, and 9 designates a water supply pipe to the cleaning container.

In this configuration, the workpiece 2 that has been gold-plated, for example, a connector contact for an electronic exchange, is moved and guided to the stepped cutting part 81 of the cleaning container 8 for cleaning the gold plating solution, and is guided to the workpiece 2. The adhering remaining portion of the gold plating solution 3 is washed with water 5 supplied to the washing container 8 through the water supply pipe 9. Since it is sufficient to wash the protruding portion of the contact with the remaining gold plating liquid 3 with the water 5, the water 5 supplied from the water supply pipe 9 is supplied to the extent that it overflows from the stepped cutting portion 81. The protruding parts of the contacts placed close to the top of the cleaning container 8 with the remaining gold plating solution 3 are wetted by the rising water surface of the water stored in the cleaning container 8, so that only one side of the contacts is necessary. After being washed, the remaining gold plating solution 3 maintains a relatively high concentration in the water 5 and overflows into the gold plating solution recovery tank 7, and is sent to an electrolytic processing device (not shown) for recovering the plating solution and recycled as metal.

Therefore, according to the prior art, cleaning water is sprayed from above and below onto the gold-plated portion of the connector contact using spray nozzles, so it is necessary to increase the water pressure to at least hit the contacts. Let water overflow from the cutting part,
The remaining gold plating solution is recovered by contacting the protruding part of the contact with the surface and wetting it.
Even if the washing water is constantly supplied, it is sufficient to cause it to slightly overflow at the cut portion of the washing container, and the amount of washing water can be significantly reduced compared to the conventional method. Therefore, the efficiency of regenerating gold from the recovered liquid can also be improved.

FIG. 3 is a perspective view of essential parts of the present invention, in which the same parts as in FIG. 2 are given the same reference numerals.

The workpiece 2 that has been gold-plated is transported in the direction of the arrow and guided to the stepped cutting part 81 of the cleaning container 8, where the gold-plating liquid 3 adhering to the coated workpiece 2 is removed.
are washed and recovered using water supplied from the water supply pipe 9 in the order explained in FIG.

Although gold is used as the final plating process in this embodiment, it is not limited to gold, and silver or other noble metals may be used. Furthermore, although the cross-sectional shape of the cleaning container 8 has been described as being cylindrical, it is not limited to the cylindrical shape, but may be angular, trapezoidal, or any other shape.

As is clear from the above description, according to the plating liquid cleaning and recovery method according to the present invention, the amount of cleaning water used is extremely small compared to the conventional plating liquid cleaning and recovery method. It is possible to recover a high concentration of , and it is expected that the efficiency of electrolytic recovery in the next process will be improved, as well as economic effects.

[Brief explanation of drawings]

FIG. 1 is a side sectional view for explaining a conventional plating liquid cleaning and recovery tank, FIG. 2 is a side sectional view for explaining an embodiment of the plating liquid cleaning and recovery tank according to the present invention, and FIG. FIG. 2 is a perspective view of essential parts of the present invention. In the figure, 1 and 7 are gold plating liquid recovery tanks;
Reference numeral 2 indicates an object to be processed, 3 indicates a residual gold plating solution, 4 indicates a nozzle, 5 indicates water, 6 and 9 indicate water supply pipes, 8 indicates a cleaning container, and 81 indicates a stepped cutting section.

Claims (1)

[Scope of Claims] 1. A method for cleaning and recovering residual plating solution adhering to a workpiece whose protruding parts have been plated by an automatic partial plating device, comprising: washing below the position of the protruding parts of the workpiece; Cleaning water is supplied to the cleaning container which has been cut at least one side of the container, and overflows at the cutting part, and in the cutting part, only one protruding side of the object to be treated is brought into contact with the raised water surface of the washing water. A method for cleaning and collecting a plating solution, which comprises cleaning the plating solution by washing the plating solution, and collecting the plating solution after washing in a recovery pot.