JPH08372Y2 - Dialysis electrode device - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention is for dialysis used to remove unnecessary ionic substances from the electrodeposition bath or plating bath in electrodeposition coating or electroplating. The present invention relates to an electrode device.

(Prior Art) Electrodeposition is performed by using an aqueous solution of an anion type coating or a cation type coating as an electrodeposition bath, immersing the electrodeposition target and the electrode therein, and energizing the space between the electrodes. It is a coating method in which an anionic paint or a cationic paint is electrodeposited on the surface. An acid or an alkali is added to the above electrodeposition bath as a neutralizing agent together with the anion type coating or the cation type coating to control the electric conductivity of the electrodeposition bath.
However, as the paint components are consumed during the electrodeposition coating, the paint components and their corresponding acids or alkalis are replenished, so that the acids or alkalis are accumulated in the electrodeposition bath. The acid or alkali thus accumulated affects the electric conductivity and the like and hinders the formation of a good coating film.

For this reason, a method has been adopted in which another electrode for the electrodeposited object is covered with an ion exchange membrane and the acid or alkali in the electrodeposition bath is dialyzed and removed by the ion exchange membrane. For example, Japanese Unexamined Patent Publication (Kokai) No. 2-163399 discloses a dialysis electrode device including a cylindrical ion exchanger having lids at both ends and electrodes installed inside the tubular ion exchanger.

(Problems to be Solved by the Invention) In the above dialysis electrode device, when performing electrodeposition coating of an electrodeposition object, the entire dialysis electrode device is electrodeposited vertically, or inclined, and further horizontally. It is submerged in the bath, or only the ion exchange membrane portion is submerged in the electrodeposition bath for use. At this time, during the operation of immersing the dialysis electrode device in the electrodeposition bath or due to vibration during electrodeposition coating, the electrode installed inside the dialysis electrode device moves axially and destroys the ion exchange membrane. There was a fear.

(Means for Solving the Problems) Therefore, the inventors of the present invention have made various studies in order to prevent the internal electrodes from moving in the above-mentioned dialysis electrode device and to make the structure easy to disassemble and assemble. result,
The present invention has been proposed. That is, the present invention is a dialysis electrode device comprising a tubular ion exchanger having lids at both ends and electrodes installed therein, wherein one lid is constructed by joining a pair of flanges through a frame body. Has been done
The flanges are frame bodies in a state in which a projection provided on the electrodes inside the flanges that reaches the inner diameter of the flange but does not reach the outer diameter of the flange and a notch provided inside the frame are fitted. It is an electrode device for dialysis that is joined by sandwiching it.

The dialysis electrode device of the present invention will be described below with reference to the drawings.

FIG. 1 is a cross-sectional view of the dialysis electrode device of the present invention.
The long tubular ion exchanger 1 has lids 2 and 2'on both ends thereof, and a long electrode 3 is installed therein. The lids 2 and 2'are attached to both ends of the tubular ion exchanger 1 so that the acid and alkali collected in the tubular ion exchanger by dialysis using the tubular ion exchanger 1 do not leak. There is. The electrode 3 is longer than the tubular ion exchanger in order to effectively utilize the entire surface of the tubular ion exchanger for dialysis, and its shape is arbitrary such as rod-shaped, tubular, columnar or plate-shaped. The shape of is adopted.

One of the lids 2 in the present invention is constructed by joining a pair of flanges 5 and 5'through a frame body 4.

FIG. 2 is an exploded perspective view of the lid 2. The electrode 3 installed inside the flange 5 is provided with a protrusion 6 that reaches the inner diameter of the flange 5 but does not reach the outer diameter. The protrusion 6 may be a pin that penetrates a through hole 7 provided in the electrode 3 as shown in FIG. 2, and the above-mentioned pin may be fixed by welding. The electrode 3 may be integrally formed with the electrode 3 and protruded from the electrode surface by a cutting process during manufacturing. Also,
The protrusion 6 reaches the inner diameter of the flange 5, but does not reach the outer diameter. If the protrusion 6 does not reach the inner diameter of the flange 5, the axial movement of the electrode 3 cannot be prevented even by joining the flanges 5 and 5 ′, and the protrusion 6 does not have the outer diameter of the flange 5. In the case of reaching up to, it is not preferable because the frame body 4 is divided by the projecting portion and the liquid inside the tubular ion exchanger leaks to the outside.

On the other hand, inside the frame body 4, a notch 8 into which the protruding portion 6 of the electrode 3 is fitted is provided. The notch 8 is provided for preventing the liquid inside the tubular ion exchanger from leaking to the outside.
Never reach outside. It is preferable that the projection 6 and the notch 8 of the electrode 3 are fitted together without a gap to prevent rattling of the electrode when the dialysis electrode device is transported or submerged in the electrodeposition bath, but some play is required. Sometimes it is easier to disassemble and assemble.

The thickness of the frame body 4 in the axial direction of the dialysis electrode device is the same as or slightly thicker than the axial thickness of the protrusion provided on the electrode.

The flanges 5 and 5 ′ are joined via the frame body 4 in a state where the projecting portion 6 of the electrode 3 and the notch 8 of the frame body 4 are fitted together. Further, in FIG. 2, the flanges 5 and 5 '
Packings 9 and 9'are used on both sides of the frame body 4 in order to prevent liquid leakage from the joint part of the frame body. Needless to say, if a material having a packing function is used for the frame body 4, the packing is unnecessary.

The dialysis electrode device of the present invention is used as follows. A tube 11 having an opening 10 above the liquid surface of the electrodeposition bath is connected to the flange 5 ', and an electrolytic solution supply hose 12 is introduced into the tube 11 to reach the position of the lid 2'at the other end of the dialysis electrode device. When the electrolytic solution is supplied from the electrolytic solution supply hose 12, the acid and alkali collected inside the dialysis electrode device through the ion exchange membrane pass through the tube 11 from the dialysis electrode device together with the electrolytic solution,
It is removed by overflow from the opening 10 of 11. In this way, acids and alkalis in the electrodeposition bath can be easily removed.

(Effect) In the dialysis electrode device of the present invention, since the internal electrode is fixed at one end, the ion exchange membrane is not damaged by the movement of the electrode during transportation or handling. Further, since the structure for fixing the electrodes is simple, there is an advantage that the dialysis electrode device can be easily disassembled and assembled.

[Brief description of drawings]

FIG. 1 is a sectional view of the dialysis electrode device of the present invention, and FIG. 2 is an exploded perspective view of the lid 2. In the figure, 1 is a cylindrical ion exchange membrane, 2 and 2'is a lid, 3 is an electrode, 4 is a frame, 5 and 5'is a flange, 6 is a projection of the electrode, 7 is a through hole of the electrode, 8 is a notch, 9 and 9'are packings, 10 is an opening of a tube, 11 is a tube, and 12 is an electrolyte supply hose.

Claims (1)

[Scope of utility model registration request] 1. A dialysis electrode device comprising a tubular ion exchange membrane having lids at both ends and electrodes installed inside the membrane. One lid is formed by joining a pair of flanges through a frame. The flanges are in a state in which a protrusion provided on the electrode inside the flange that reaches the inner diameter of the flange but does not reach the outer diameter of the flange and a notch provided inside the frame are fitted together. An electrode device for dialysis, which is joined by sandwiching the frame body with.