JP2002363800A - Electrode, and ultrasonic electrolytic cleaning device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ultrasonic electrolytic cleaning device in which a work to be cleaned and the electrode are electrically connected to each other automatically only by charging the work into a cleaning tank, without needing any operation of connecting them and the power consumption can be reduced, and to provide the electrode therefor. SOLUTION: Only a lower surface of an electrode plate 28 of an anode electrode 4 being the electrode is exposed from an insulating film and brought into contact with an electrolytic cleaning solution in the cleaning tank 2, and a conductive net-like body 3 functioning as another electrode is placed in the electrolytic cleaning solution in a facing manner via the electrolytic cleaning solution in the cleaning tank 2. The work placed on the conductive net-like body is electrically brought into contact with a part not covered by the non- conductive, insulating film of the conductive net-like body 3 naturally in the electrolytic cleaning solution. The work of connecting the work to the conductive net-like body 3 as a cathode electrode body becomes unnecessary, and since the contact area of the anode electrode with the electrolytic cleaning solution is small, the power consumption can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ultrasonic electrolytic cleaning apparatus and an electrode used for the apparatus.

[0002]

2. Description of the Related Art Conventionally, a technique called ultrasonic electrolytic cleaning is a known technique as disclosed in, for example, Japanese Utility Model Laid-Open No. 5-81278, and is generally practiced.

In the ultrasonic electrolytic cleaning apparatus disclosed in the publication, as a means for cleaning metal products, degreasing and derusting are caused by a reduction reaction occurring on the surface of the object to be cleaned due to a potential difference between the two electrodes, and hydrogen gas generated is generated. By using the effect of raising dirt by using the ultrasonic wave together, a higher cleaning effect is aimed at. In this case, as a method of electrically connecting the object to be cleaned with the cathode, a method of contacting the object to be cleaned with the cathode using a clip or the like is adopted.

[0004]

However, if the means for connecting the object to be cleaned and the cathode is a clip or the like, each object to be cleaned must be connected to the electrode. In the case of an object to be cleaned having a shape (for example, a sphere) in which the electrode cannot be fixed with the clip by such means, the connection itself becomes difficult, and when a large number of objects to be cleaned are processed at the same time, the operation becomes extremely complicated. In addition, it is necessary to provide a large number of electrodes on the cleaning tank side of the ultrasonic electrolytic cleaning apparatus. Also, power consumption is increased due to a large contact area between the electrolytic cleaning solution in the cleaning tank and the anode.

The present invention solves the conventional problems, eliminates the need for an operation of connecting the electrode and the object to be cleaned, and allows the object to be cleaned and the electrode to be electrically connected simply by putting the object into the cleaning tank. It is an object of the present invention to provide an ultrasonic electrolytic cleaning apparatus capable of being connected and further reducing power consumption, and an electrode body used in the cleaning apparatus.

[0006]

According to a first aspect of the present invention, there is provided an electrode body having a dimension longer than the dimension of an upper opening of a cleaning tank, and a hook piece for hanging both ends on an upper edge of the opening. Both a hanging piece hanging down from the stop piece and a projecting end side are bent downward, and a holding piece electrically connected to the hanging piece via the hanging piece, and a projecting end of the holding piece. Each of the attached electrode plates and a portion to be immersed in an electrolytic cleaning solution in the cleaning tank and a portion to be connected to a power supply provided on the latching piece so as to supply current to the electrode plates during electrolytic cleaning, and confronting the object to be cleaned. And a non-conductive insulating coating covering other than the lower surface of the electrode plate.

According to a second aspect of the present invention, there is provided an electrode body having a dimension longer than an upper opening dimension of the cleaning tank and hanging both ends on an upper edge portion of the opening, and a hanging piece hanging down from the hanging piece. A piece, an electrode plate attached to an end of the hanging piece so as to be electrically connected to the hanging piece through the hanging piece, and provided on the hanging piece so as to supply current to the electrode plate during electrolytic cleaning. And a non-conductive insulating film that covers a part other than the lower surface of the electrode plate facing the object to be cleaned immersed in the electrolytic cleaning solution in the cleaning tank.

According to a third aspect of the present invention, there is provided an ultrasonic electrolytic cleaning apparatus comprising:
A cleaning tank having an upper edge formed by opening an upper portion and containing an electrolytic cleaning liquid therein; and a hooking piece of an electrode body being hung on the upper edge of the cleaning tank and arranged in the cleaning tank. And contacting the electrode body according to claim 1 by placing an object to be cleaned which is disposed in the cleaning tank in a state of being opposed to an electrode plate of the electrode body via an electrolytic cleaning solution and which is placed in the electrolytic cleaning solution. And a conductive mesh functioning as the other electrode body.

According to a fourth aspect of the present invention, there is provided an ultrasonic electrolytic cleaning apparatus comprising:
A cleaning tank having an upper edge formed by opening an upper portion and containing an electrolytic cleaning liquid therein; and a hooking piece of an electrode body being hung on the upper edge of the cleaning tank and arranged in the cleaning tank. 3. The electrode body according to claim 2, which is placed in a state of being opposed to the electrode plate of the electrode body via the electrolytic cleaning solution in the cleaning tank, and is placed in contact with the cleaning object by being placed in the electrolytic cleaning solution. And a conductive mesh functioning as the other electrode body.

The operation of the present invention will be described below.

According to the electrode plate according to the first and second aspects of the present invention, in the cleaning tank containing the electrolytic cleaning liquid, a portion other than the lower surface of the electrode plate facing the object to be cleaned is covered with a nonconductive insulating film. As a result, the contact area between the electrode body and the electrolytic cleaning liquid is reduced, and power consumption is reduced.

According to the ultrasonic electrolytic cleaning apparatus according to the third and fourth aspects of the present invention, power consumption is reduced by using the electrode plate, and at the same time, the object to be cleaned comes into contact with the other to be cleaned. Since the conductive mesh functioning as an electrode body is used, the washing object and the conductive mesh can be brought into electrical contact just by putting the object to be washed in the electrolytic cleaning solution, and the electrode plate of the electrode body can be cleaned. Since the objects are opposed to each other, ultrasonic cleaning can be performed on the object to be cleaned, so that the operation of connecting the object to be cleaned to the electrode body can be eliminated.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An ultrasonic electrolytic cleaning apparatus according to an embodiment of the present invention and an electrode body used in the cleaning apparatus will be described below.

(Embodiment 1) The ultrasonic electrolytic cleaning apparatus shown in FIGS. 1 and 2 comprises a rectangular parallelepiped main body 1 having an open top.
A cleaning tank 2 provided inside the main body 1 and containing an electrolytic cleaning liquid L and having an open top, and a cathode disposed in the cleaning tank 2 so as to be immersed in the electrolytic cleaning liquid L and detachably attached to the cleaning tank 2. A conductive mesh body 3 functioning as an electrode body;
An anode electrode body 4 as one electrode body which is disposed in a state in which it is in contact with the electrolytic cleaning solution L and faces the conductive net 3 and is detachably mounted on the cleaning tank 2.
A circulating system 5 using a pump 6 and a filter 7 for forcibly circulating the electrolytic cleaning solution L in the cleaning tank 2;
Ultrasonic generating means 10 for generating cavitation in the electrolytic cleaning liquid L disposed on the bottom rear surface of the anode electrode body 4
And a power source 8 connected to the anode terminal 4 and the conductive net 3 with a positive terminal connected thereto and a negative terminal connected to the conductive net 3.

At the upper edge of the main body 1, an insulating cover (shown by cross-hatched lines in FIG. 1) 30 made of a sheet of Teflon (registered trademark) or vinyl chloride is arranged over the entire periphery. The safety in use is enhanced by preventing short circuit between the reticulated body 3 and the anode electrode body 4 and the main body 1.

The washing tank 2 is partitioned by a partition wall 9 on one end side of the main body 1 and has a circulation auxiliary tank 2a on a side of the partition wall 9, and circulates through the circulation auxiliary tank 2a. One end of the pipe 11 of the system 5 is attached, and the other end of the pipe 11 connecting the pump 6 and the filter 7 in the middle faces the cleaning tank 2 on the other end side of the main body 1.

As shown in FIGS. 1 and 2, the conductive mesh 3 does not prevent the convection of the electrolytic cleaning solution L and has a large number of meshes smaller than the object to be cleaned. The mounting portion 12 is provided on the bottom portion, and the supporting pieces 13 are erected from the four corners of the mounting portion 12, and the upper end portion of each supporting piece 13 is bent at a substantially right angle to form the claw piece 14, and the four pieces are formed. The claw piece 14 is hung on the upper edge of the cleaning tank 2, and the conductive net 3 is arranged at a fixed position inside the cleaning tank 2. A cathode connecting piece 15 is erected from any one of the nail pieces 14, and a cathode cable 16 connected to the negative terminal of the power supply 8 is connected to the cathode connecting piece 15 using a conductive clip 17. are doing.

As shown in the enlarged view of FIG. 3, the cathode connection piece 15 of the conductive mesh 3 and the support piece 13 and the claw piece 14 excluding the mounting portion 12 are made of a non-conductive resin film (FIG. 3). (Indicated by a dotted line in FIG. 3) 40 is insulated so as not to close the mesh, preventing the washing tank 2 from being charged, eliminating the danger of short-circuit and the like, and reducing power consumption.

The non-conductive resin film 40 is, for example, a film having a thickness of 2 to 4 mm containing a nylon-based resin (polyamide resin) as a main component and a hardener, and a hardener containing a polyester-based resin as a main component. Thickness 1-2m added
m is adopted.

As the non-conductive resin film 40,
In addition to the cases described above, an insulating tape, an insulating tube, or the like can be used.

The anode electrode body 4 is made of a conductive material such as iron or carbon. As shown in FIGS. 1 and 2, a straight hook having a size slightly longer than the size of the upper opening of the cleaning tank 2 is used. A stop piece 21, two hanging pieces 22 suspended at predetermined intervals from the hanging piece 21, a straight connecting piece 23 erected at each lower end of the two hanging pieces 22, and a connecting piece 23 6 holding pieces 24 which are attached to the projecting end side at predetermined intervals and are bent downward, and a total of 6 disk-like pieces (for example, a thickness of 1 mm and a diameter of 20 mm) attached to the projecting end of each holding piece 24. The electrode plate 28) and the anode connecting piece 25 erected from one end of the hooking piece 21 are integrally formed by a welding technique. The anode cable 2 connected to the positive terminal of the power supply 8 with respect to the anode connection piece 25
6 are connected using a clip 27 having conductivity.

The anode electrode body 4 is also connected to the anode connecting piece 25.
The other than the lower surface of the electrode plate 28 is insulated by a non-conductive resin film 40 as in the case of the conductive net 3. As a method of forming the non-conductive resin film 40 on the electrode plate 28, a resin film that covers the entire lower surface of the electrode plate 28 with a non-conductive resin film, A method of cutting with a knife or the like can be given.

The electrolytic cleaning liquid L injected into the cleaning tank 2 and used for ultrasonic cleaning is, for example, 75 g of caustic soda.
/ L, tertiary sodium phosphate 10g / l, sodium phosphate 14
g / l, surfactant / g / l composition, liquid temperature 8
In this embodiment, it is preferable to set cleaning conditions of 0 to 90 ° C., a voltage of 5 to 7 V, and a current of 20 to 50 A.

The level of the electrolytic cleaning liquid L in the cleaning tank 2 is regulated by the partition plate 9 in the cleaning tank 2 so that the electrode plate 28 is sufficiently in contact with the electrolytic cleaning liquid L and the pump is used. The electrolytic cleaning liquid L is forcibly circulated by the filter 6 and the filter 7 to prevent re-adhesion of dirt, and to enhance the cleaning effect by causing convection in the electrolytic cleaning liquid L.

Next, the operation of the ultrasonic electrolytic cleaning apparatus having the above configuration will be described below.

The four claws 14 of the conductive mesh 3 are hung on the edge of the cleaning tank 2 to dispose the placing portion 12 on the bottom side of the cleaning tank 2, and the object 50 to be cleaned is moved to the cleaning tank 2. The object 50 to be cleaned sinks in the electrolytic cleaning liquid L and comes into contact with the mounting portion 12 which is not covered with the non-conductive resin film 40 of the conductive network 3.

The anode electrode body 4 is placed on the edge of the cleaning tank 2 after the object 50 to be cleaned is put into the cleaning layer 2.

Then, the cathode connecting piece 15 of the conductive mesh 3
Is connected to the cathode cable 16 using the clip 17,
The other end of the cathode cable 16 is connected to the negative terminal of the power supply 8. Further, the anode connection piece 25 of the anode electrode body 4 is connected to the anode cable 26 using the clip 27, and the other end of the anode cable 26 is connected to the plus terminal of the power supply 8. Then, a driving voltage is applied from the power source 8 to the electrode plate 28 of the anode electrode body 4 and the object 50 to be cleaned which is in contact with the conductive mesh 3, and cavitation is applied to the electrolytic cleaning liquid L by the ultrasonic wave generating means 10. Generate.

As a result, an electrolytic current flows from the electrode plate 28 of the anode electrode body 4 toward the object 50 to be cleaned.
Cleaning can be performed efficiently. At this time, the electrolytic cleaning solution L is forcibly circulated by the pump 6 and the filter 7 to prevent re-adhesion of dirt and to cause convection in the electrolytic cleaning solution L, thereby improving the cleaning effect of the object 50 to be cleaned. it can.

The object 50 to be cleaned, which has been cleaned in this manner, is taken out of the cleaning tank 2 and placed in a rinsing tank (not shown) to be washed with water or warm water. The processing is performed, and further, a drying processing using air, a dryer, a cloth, or the like is performed.

As described above, according to the ultrasonic electrolytic cleaning apparatus of the present embodiment, merely by putting the object to be cleaned 50 in the electrolytic cleaning liquid L, the object to be cleaned sinks in the electrolytic cleaning liquid L to form a conductive mesh. The mounting part 12 of the body 3 which is not covered with the non-conductive insulating film 40 is electrically contacted with itself, so that the object 50 can be subjected to ultrasonic electrolytic cleaning. The work of connecting to the reticulated body 3 can be eliminated, and the workability can be improved particularly when the object 50 to be cleaned is small and large in number.

Further, except for the contact portion of the electrode plate 28 of the anode electrode body 4 which is the electrode body of the first embodiment with the electrolytic cleaning liquid L and the anode connection piece 25 which is the conduction portion with the power supply 8, a non-conductive insulating material is used. The conductive mesh 3 is covered with a non-conductive insulating film 40 except for the mounting portion 12 which is in contact with the object 50 to be cleaned and the cathode connection piece 15 which is a conductive portion with the power supply 8. Therefore, the cleaning tank 2 is prevented from being charged, the danger of a short circuit or the like is eliminated, and unnecessary power consumption is eliminated, so that power consumption can be reduced.

(Embodiment 2) Next, Embodiment 2 of the present invention will be described with reference to FIG.

FIG. 4 shows that, instead of the anode electrode body 4, an anode electrode body 4A having one plate-like electrode plate 28a which can be arranged in the cleaning tank 2 is used as one electrode body. Is the feature.

That is, this anode electrode body 4A includes a hooking piece 21, a hanging piece 22, and an anode connecting piece 25 having the same shape as that of the anode electrode body 4, and one disk is provided at the lower end of the hanging piece 22. An electrode plate 28a made of a plate-like body is integrally attached by a welding technique. The hanging piece 2
1. The entire outer periphery of the hanging piece 22 and the upper and outer side surfaces of the electrode plate 28a are formed of a non-conductive resin film 40.

As for the method of forming the non-conductive resin film 40 on the electrode plate 28a, the entire outer periphery of the electrode plate 28a is covered with the non-conductive resin film 40, and A method of cutting off the resin film 40 covering the lower surface portion in contact with the cleaning liquid L with a knife or the like can be given.

The ultrasonic electrolytic cleaning using the anode electrode body 4A of the second embodiment is the same as that of the first embodiment, and the electrode plate 28 of the anode electrode body 4A as shown in FIG.
a, oxygen (O ₂ ) is generated on the lower surface, and hydrogen (H ₂ ) is generated on the outer peripheral surface of the object 50 to be cleaned connected to the conductive network 3, and is electrolyzed from the electrode plate 28a toward the object 50 to be cleaned. The electric current I flows, and the ultrasonic cleaning of the object 50 can be performed.

In FIG. 4, the electrode plate 28a has been described as a single disk-shaped plate. However, the present invention is not limited to this, and a plurality of wires as shown in FIG. An electrode plate 28b made of a rectangular mesh or an electrode plate 28c made of a mesh obtained by forming a hole 28d in a single rectangular plate (iron plate) as shown in FIG. 6 may be used. In the case of these nets, the cost of the anode plate can be reduced. As a method of forming the non-conductive resin film, for example, the lower surface portion of the mesh body is pressed against a viscous clay plate to cover the portion, the upper surface portion is coated with a resin film and cured, and then, It can also be formed by separating a clay plate.

The first and second embodiments described above.
The coating of the non-conductive resin film 40 on the support pieces 13 of the conductive mesh body 3 can be omitted except for the portions of the support pieces 13 immersed in the electrolytic cleaning liquid L.

[0040]

According to the electrode plate of the first and second aspects of the present invention, in the cleaning tank containing the electrolytic cleaning liquid, the lower surface of the electrode plate facing the object to be cleaned is covered with a non-conductive insulating film. As a result, the contact area between the electrode body and the electrolytic cleaning liquid can be reduced, thereby reducing power consumption.

According to the ultrasonic electrolytic cleaning apparatus according to the third and fourth aspects of the present invention, the power consumption can be reduced by using the electrode plate, and at the same time, the object to be cleaned comes into contact with the other electrode body to be brought into contact therewith. Since a conductive mesh that functions is used, the object to be washed can be brought into electrical contact with the conductive mesh simply by putting the object into the electrolytic cleaning solution. Since the object to be cleaned can be subjected to ultrasonic electrolytic cleaning by confronting, the operation of connecting the object to be cleaned to the electrode body can be eliminated. As a result, workability can be improved particularly when the object to be cleaned is small and the number of objects is large.

[Brief description of the drawings]

FIG. 1 is a cutaway perspective view showing an anode electrode body and a part of an ultrasonic electrolytic cleaning apparatus according to Embodiment 1 of the present invention.

FIG. 2 is a sectional view of the anode electrode body and the main body of the ultrasonic electrolytic cleaning apparatus according to Embodiment 1 of the present invention.

FIG. 3 is an enlarged cross-sectional view of a cleaning tank, an anode electrode body, and a conductive mesh in the ultrasonic electrolytic cleaning apparatus according to Embodiment 1 of the present invention.

FIG. 4 is an enlarged cross-sectional view of a cleaning tank, an anode electrode body, and a conductive mesh in the ultrasonic electrolytic cleaning apparatus according to Embodiment 2 of the present invention.

FIG. 5 is a diagram showing a modification of the electrode plate according to the second embodiment of the present invention.

FIG. 6 is a diagram showing another modification of the electrode plate according to the second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 2 Cleaning tank 3 Conductive mesh 4 Anode electrode body 5 Circulation system 6 Pump 7 Filter 8 Power supply 12 Mounting part 13 Support piece 14 Claw piece 15 Cathode connection piece 16 Cathode cable 21 Hanging piece 22 Hanging piece 23 Connection Piece 24 holding piece 28 electrode plate 28a electrode plate 40 resin coating L electrolytic cleaning liquid

Claims (4)

[Claims] 1. A hanging piece having a dimension longer than an upper opening dimension of a washing tank and hanging both ends on an upper edge portion of the opening, a hanging piece hanging down from the hanging piece, and both a protruding end side. Are bent downward and are electrically connected to the hanging piece via the hanging piece; electrode plates respectively attached to the protruding ends of the holding piece; and the electrode plate during electrolytic cleaning. A non-conductive insulating film covering portions other than the conductive portion provided on the hooking piece to be energized with the power supply and the lower surface of the electrode plate facing the object to be cleaned immersed in the electrolytic cleaning solution in the cleaning tank. An electrode body, comprising: 2. A hanging piece having a dimension longer than an upper opening dimension of the cleaning tank and hanging both ends on an upper edge portion of the opening, a hanging piece hanging down from the hanging piece, and a hanging piece extending through the hanging piece. An electrode plate attached to the end of the hanging piece so as to be electrically connected to the hanging piece, and a conductive portion provided with the power supply provided on the hanging piece so as to energize the electrode plate during electrolytic cleaning. A non-conductive insulating coating covering a part other than the lower surface of the electrode plate facing the object to be cleaned immersed in the electrolytic cleaning solution in the cleaning tank. 3. A cleaning tank having an upper edge formed by opening an upper portion and containing an electrolytic cleaning liquid therein; and a hook for an electrode body being hung on the upper edge of the cleaning tank. An electrode body according to claim 1, which is disposed in a tank, and an object to be cleaned which is disposed in the cleaning tank so as to be opposed to an electrode plate of the electrode body via an electrolytic cleaning liquid and which is placed in the electrolytic cleaning liquid. And a conductive mesh that functions as the other electrode body by contacting when placed. 4. A cleaning tank having an upper edge formed by opening an upper portion and containing an electrolytic cleaning liquid therein; and a cleaning piece of an electrode body being hung on the upper edge of the cleaning tank. 3. The electrode body according to claim 2, which is disposed in a tank, and an object to be cleaned which is disposed in the cleaning tank so as to face an electrode plate of the electrode body via an electrolytic cleaning liquid and is placed in the electrolytic cleaning liquid. And a conductive mesh that functions as the other electrode body by contacting when placed.