JPS5922113Y2 - Replenishment liquid supply device for plating liquid - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a plating solution replenishment liquid supply device used for automatic control of plating solutions.

When using a plating solution, especially an electroless plating solution, metal salts, reducing agents, etc. are consumed in a short period of time, and the composition of the solution fluctuates rapidly. An automatic control device or method has been proposed (Japanese Unexamined Patent Publication No. 53-44434, 53=4563
No. 1, No. 54-8123, etc.), but in these automatic control devices, a metering pump is used as a means for supplying replenishment liquid to the plating solution.

However, recently, more precise metering pumps have been proposed, but these are expensive, and the general-purpose ones tend to break down in the field, and their quantitative performance is not always satisfactory. In addition, careful attention must always be paid to the quantitative setting operation and its control, and there is a risk of mistakes occurring during the quantitative setting operation, which poses problems in handling.

If the metering pump malfunctions or if a mistake is made in the metering setting operation, there is a risk that too much or too little replenishment liquid will be added to the plating solution, damaging the plating solution and damaging the appearance, physical properties, etc. of the plated object. There is.

In addition, especially when the plating tank is large and the amount of replenishment liquid required at one time is large, a large metering pump must be used or a large number of metering pumps must be installed, resulting in extremely high equipment costs. It had the following drawbacks.

The present invention eliminates the above drawbacks and can always reliably supply a fixed amount of replenishment fluid, is easy to handle, has little risk of operational errors, and is relatively simple and inexpensive to construct. The present invention provides a supply device for supplying a plating solution that can be manufactured.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows an example of a replenishment liquid supply device 1, in which 2 is a replenishment liquid measuring cylinder whose lower side forms a small diameter pipe part 3, the upper end of this measuring cylinder 2 is closed, and the small diameter pipe part 3 is closed. A solenoid valve 4 is interposed therein.

This solenoid valve 4 opens and closes in response to signals from a limit switch or the like that is activated each time the object to be plated enters and exits the plating tank 5, or automatically senses the concentration of the plating solution and outputs an electric signal when the concentration reaches a predetermined concentration. The plating solution is replenished by opening and closing in response to the electrical signal of the plating wave motion control device, or by opening and closing at predetermined time intervals using a timer if the amount of replenishment solution per unit time is predetermined. It is constructed so that it opens when necessary to allow the entire amount of replenishment liquid in the measuring tube 2 to flow out.

Reference numeral 6 denotes a replenishment liquid introduction pipe in which a pump 7 is interposed, one end of which passes through the upper end wall 8 of the measuring cylinder 2 and communicates with the inside of the cylinder 2, and the other end of which is connected to the replenishment liquid in the replenishment liquid tank 9. is immersed in.

The pump 7 is set to operate immediately or at a predetermined interval after the valve 4 is closed by a timer or the like, and the operation time is determined by a timer 10 such that the replenishment liquid in the replenishment tank 9 is pumped from the introduction pipe 6. The time is set to be sufficient for the liquid to flow into the cylinder 2 and the liquid level in the cylinder 2 to rise above one end of the overflow pipe 11 inserted into the cylinder 2, which will be described later. After the temperature rises, the operation of the pump 7 is stopped and liquid feeding is stopped.

One end of the overflow pipe 11 liquid-tightly penetrates the side wall of the cylinder 2 and is bent upward within the cylinder 2, so that one end of the overflow pipe 11 faces upward. It is located below one end of the introduction tube 6.

The other end of the overflow pipe 11 is located slightly above the replenishment liquid tank 9, and the liquid in the cylinder 2 located above one end of the overflow pipe 11 overflows from one end of this pipe 11 and flows inside the pipe 11. , is returned to the replenishment liquid tank 9.

Further, an opening 12 is provided in a part of the upper end wall 8 of the cylinder 2, and a rod-shaped liquid volume adjusting member 13 made of plastic or the like can move forward and backward into the cylinder 2 through this opening 12 (in the axial direction). The liquid amount adjusting member 13 is fixed at a predetermined insertion position by a screw 15 passing through a protruding wall 14 protruding from the edge of the opening 12.

In the device 1 configured as described above, the pump 7 operates when the valve 4 is closed, and as a result, the replenishment liquid in the replenishment liquid tank 9 flows into the measuring cylinder 2 through the introduction pipe 6, and After the liquid level rises above one end of the overflow pipe 11 and the liquid begins to overflow from one end of this pipe 11, the operation of the pump 7 is stopped and the supply of replenishment liquid into the cylinder 2 is stopped. do.

Then, the liquid existing above the one end of the overflow pipe 11 protruding into the cylinder 2 overflows from this pipe 11 and is returned to the replenishment liquid tank 9, and the liquid level in the cylinder 2 reaches the one end position of the overflow pipe 11. When it descends, the overflow stops.

In this way, a certain amount of replenishment liquid is always stored between the solenoid valve 4 and one end of the overflow pipe 11, and when the plating liquid in the plating tank 5 needs replenishment, the solenoid valve 4 is activated. By opening, the predetermined amount of replenishment liquid is supplied into the plating tank 5.

In this case, if the installation position of the solenoid valve 4 is slightly changed when installing the device 1 at the site, the amount of replenishment liquid to be stored in the cylinder 2 will be inconsistent, but this device 1 15 to move the liquid volume adjustment member 13 in the axial direction, and adjust the length and therefore the volume of the liquid volume adjustment member 13 immersed in the replenishment liquid stored between the solenoid valve 4 and one end of the overflow pipe 11. Through this adjustment, the amount of replenishment liquid measured between the solenoid valve 4 and one end of the overflow pipe 11 can be adjusted very easily, which is very advantageous when the device 1 is installed at a site.

Further, when changing the amount of liquid to be measured, the adjustment can be made in the same manner.

FIG. 2 shows another embodiment of the present invention, in which one end of the overflow pipe 11 is connected to the side wall of the measuring tube 2.

Further, in this example, the lower part of the liquid volume adjusting member 13 is formed to have a larger diameter, and the embodiment shown in FIG. 2 also has the same functions and effects as the embodiment shown in FIG. 1.

Moreover, FIG. 3 shows yet another embodiment of the present invention,
The overflow pipe 11 is passed through the lower tapered wall 16 of the cylinder 2 in a liquid-tight manner, and is projected into the cylinder 2 in an upright state.
One end of the overflow pipe 11 is arranged upward.

In addition, in this example, the overflow pipe 11 is located inside the cylinder 2.
A liquid level sensor 17 is disposed at a predetermined position above one end, and after the pump 7 starts operating, the replenishment liquid in the replenishment liquid tank 9 flows into the cylinder 2, and the liquid level is detected by this sensor. 17, the operation of the pump 7 is stopped by an electric signal.

In this case, the liquid level sensor 17 is as shown in FIGS. 1 and 2 described above.
It is also possible to provide a device as a safety device in which the stoppage of the pump 7 is controlled by a timer 10 as shown in the figure.

Furthermore, in this example, the liquid volume adjusting member 13 is configured in a shape in which large diameter portions and small diameter portions are alternately formed on the lower side thereof, and this example also has the same effect as the embodiment shown in FIG. .

In addition, in the above-mentioned embodiment, one liquid volume adjusting member 13 is provided, but the invention is not limited to this, and a plurality of members may be provided. There is no need to close it, and other configurations may be modified in various ways without departing from the gist of the present invention.

As explained above, the present invention includes a replenishment liquid measuring cylinder 2, a replenishment liquid introduction pipe 6 whose one end communicates with the inside of the cylinder 2, and an overflow whose one end communicates with the inside of the cylinder 2 below the one end of the introduction pipe 6. a pipe 11, a pump 7 that passes through the introduction pipe 6 and supplies the replenishment liquid in the replenishment tank 9 into the cylinder 2, and a pump 7 that opens when the plating solution needs to be replenished to supply the replenishment liquid in the cylinder 2. a valve 4 for supplying plating solution to the plating solution; and when the valve 4 is closed, the pump 7 is operated to supply the replenishing solution tank 9.
control means for introducing the replenishing liquid into the cylinder 2 and stopping the operation of the pump 7 after the liquid level in the cylinder 2 rises above one end of the overflow pipe 11. The liquid existing above one end of the overflow pipe 11 is discharged from the overflow pipe 11 to the outside of the cylinder 2, and the replenishing liquid is stored between one end of the overflow pipe 11 and the valve 4, so that the liquid inside the measuring cylinder is It is possible to always reliably measure and store a certain amount of replenishment liquid, so it is possible to always supply a certain amount of replenishment liquid to the plating solution, and when the amount of replenishment liquid at one time is large, the capacity of the measuring tube can be It is advantageous that a large one can be used, that it is easy to handle, there is little risk of operational errors, and that the structure is relatively simple and can be manufactured at low cost.

[Brief explanation of drawings]

Fig. 1 is a schematic cross-sectional view showing one embodiment of the present invention, Fig. 2 is a schematic cross-sectional view showing another embodiment of the present invention, and Fig. 3 is a schematic cross-sectional view showing yet another embodiment of the present invention. It is. DESCRIPTION OF SYMBOLS 1... Replenishment liquid supply device, 2... Measuring cylinder, 4... Valve, 6... Replenishment liquid introduction pipe, 7... Pump, 9...
- Replenishment liquid tank, 10... timer, 11... overflow pipe, 13... liquid level adjustment member, 17... liquid level sensing meter.

Claims (1)

[Claims for Utility Model Registration] ■ A replenishment liquid measuring cylinder 2, a replenishment liquid introduction pipe 6 whose one end communicates with the inside of the cylinder 2, and an overflow whose one end communicates with the inside of the cylinder 2 below the one end of the introduction pipe 6. a pipe 11, a pump 7 that passes through the introduction pipe 6 and supplies the replenishment liquid in the replenishment tank 9 into the cylinder 2, and a pump 7 that opens when the plating solution needs to be replenished to supply the replenishment liquid in the cylinder 2. a valve 4 for supplying plating solution to the plating solution, and when the valve 4 is closed, the pump 7 is operated to introduce the replenishment liquid in the replenishment liquid tank 9 into the cylinder 2, and to lower the liquid level in the cylinder 2. is the overflow pipe 11
control means for stopping the operation of the pump 7 after the overflow pipe 1 in the cylinder 2 rises above one end;
1. For plating liquid, the liquid existing above one end is discharged from the overflow pipe 11 to the outside of the cylinder 2, and the replenishing liquid is stored between the one end of the overflow pipe 11 and the valve 4. Replenishment fluid supply device. 2. The device according to claim 1, which is a registered utility model, in which a rod-shaped liquid volume adjusting member 13 is disposed within the cylinder 2 so as to be movable back and forth substantially along the axial direction thereof.