JPH09210949A - Manufacture of ion electrode - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the costs of an ion electrode and prevent poor workmanship in adhesion by forming a work for electrode having a specific configuration from a porous synthetic resin sheet, immersing the work in an ion sensitive solution contained in a vessel, and evacuating inside the vessel. SOLUTION: A synthetic resin sheet made of porous polypropylene or nylon having a thickness of 1mm is blanked with a die for press working so that a work 2 for electrode of 2mm in diameter is prepared. This work 2 for electrode is immersed in a pre-adjusted ion sensitive solution 3 contained in a vessel 4, which is shut with a lid 5, and inside the vessel 4 is evacuated by a vacuum pump 6, thereby impregnating the capillary part of the immersed porous work 2 and its whole surfaces with the ion sensitive solution 3, and thus the intended ion electrode is completed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing an ion electrode used for a hardness leak sensor attached to a water softener or the like.

[0002]

2. Description of the Related Art A conventional method for producing an ion electrode is to inject an ion-sensitive solution into a predetermined container (for example, a container having a diameter of 150 mm) and immerse a resin net having a predetermined thickness (1 mm) in the ion-sensitive solution. Then, after the ion-sensitive solution is attached to the entire net, the net is dried to form an ion-sensitive film. And this ion-sensitive membrane (diameter 15
An ion electrode having a predetermined shape (for example, a diameter of 10 mm) is cut out from a circular sheet having a thickness of 0 mm and a thickness of 1 mm. Therefore, the yield of the expensive ion-sensitive film is poor and the cost is high. Further, since the ion electrode is formed by cutting out from a dry ion-sensitive film, when it is inserted into the electrode fitting portion of the hardness leak sensor, adhesion failure easily occurs at the end portion, which is a problem.

[0003]

SUMMARY OF THE INVENTION In view of the above problems, it is an object of the present invention to provide an ion electrode manufacturing method which can reduce the cost of the ion electrode and eliminate defective adhesion.

[0004]

The present invention has been made to solve the above problems, and is a method for producing an ion electrode used in a hardness leak sensor, which comprises a porous synthetic resin sheet. The electrode base material having a predetermined shape is formed, the electrode base material is immersed in a container containing an ion-sensitive solution, the inside of the container is vacuum-sucked, and the electrode base material is impregnated with the ion-sensitive solution. There is.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of the present invention will be described. In the method of manufacturing an ion electrode of the present invention, first, a cheap synthetic resin sheet such as porous polypropylene or nylon (thickness: 1 mm)
An electrode substrate having a predetermined shape (for example, a diameter of 10 mm) is punched out with a press die, the electrode substrate is immersed in a container containing an ion-sensitive solution that has been adjusted in advance, the container is sealed, and a vacuum pump is provided inside the container. Vacuum suction using. By this vacuum suction, the entire surface of the capillary part and the electrode base of the porous material is impregnated with the ion-sensitive solution to form an ion electrode.

Then, this ion electrode is inserted into the electrode fitting portion of the main body of the hardness / leakage sensor, and a weight is applied and bonded, and then dried. As described above, according to the present invention, the expensive ion-sensitive solution is impregnated and coated on the electrode base without waste, so that the yield is good, and therefore the production cost of the ion electrode can be reduced. Also, since the ion electrode is inserted into the electrode fitting portion of the hardness leak sensor main body and then dried, adhesion failure is eliminated and efficiency is improved.

[0007]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 to 4 are explanatory views showing an outline of a method for manufacturing an ion electrode according to the present invention.

FIG. 1 is an explanation of the first step showing a state in which an electrode substrate 2 (diameter 10 mm) is punched from a synthetic resin sheet 1 (thickness 1 mm) such as porous polypropylene or nylon with a pressing die. It is a figure. The porous synthetic resin sheet 1 has marketability, so the price is low and the handling is easy. FIG. 2 shows that the electrode substrate 2 is immersed in a container 4 containing a preliminarily prepared ion-sensitive solution 3, the container 4 is sealed with a lid member 5, and the inside of the sealed container 4 is vacuumed by a vacuum pump 6. It is explanatory drawing of the 2nd process which shows the state which attracts | sucks. By the vacuum suction in the second step, the electrode base material 2 immersed in the container 4 is impregnated with the ion-sensitive solution 3 on the entire surfaces of the porous capillary portion 2a and the electrode base material 2 as shown in FIG. As a result, the ion electrode 7 is formed.

As the ion-sensitive solution 3, for example, a solution in which a vinyl chloride resin powder is dissolved in a solvent such as THF (tetrohydrofuran) and a proper amount of a plasticizer and an organic phosphate calcium salt is mixed is applied. . However, the ion-sensitive solution 3 is not limited to this example,
It can be appropriately selected depending on the implementation.

Then, the ion electrode 7 is inserted into the electrode fitting portion 9 of the body 8 of the hardness leak sensor as shown in FIG. 4, and pressure (for example, weight) is applied from the outer surface of the ion electrode 7.
After applying the adhesive, it is dried. Therefore, since the ion electrode 7 can be completely adhered to the electrode fitting portion 9, the trouble due to the adhesion failure as in the conventional case can be eliminated.

The hardness leak sensor is installed, for example, in the treated water outlet side flow path of the water softener to measure the calcium ion concentration in the treated water, and if there is hardness leak, an alarm device is used. Therefore, since the ion electrode 7 used for this hardness leak sensor is constantly immersed in the treated water, it is particularly necessary that it be completely bonded to the electrode fitting portion 9. Ion electrode 7 manufactured by the manufacturing method of the present invention
Since the ion electrode 7 is inserted into the electrode fitting portion 9 before the ion-sensitive solution 3 is completely dried, the adhesiveness is good and there is no adhesion failure.

[0012]

As described above, according to the present invention, an electrode base is formed from a porous synthetic resin sheet, the electrode base is immersed in a container containing an ion-sensitive solution, and the inside of the container is vacuumed. Since suction is performed and the electrode base material is impregnated with the ion-sensitive solution, the yield of expensive ion-sensitive solution can be improved and the manufacturing cost can be significantly reduced as compared with the conventional method for manufacturing an ion electrode.

[Brief description of drawings]

FIG. 1 is an explanatory view of a first step of the present invention, and is an explanatory view of a state where an electrode base material is punched out from a synthetic resin sheet.

FIG. 2 is an explanatory view of a second step of the present invention, and is an explanatory view of a state in which the electrode base material is immersed in a container containing an ion-sensitive solution and the inside of the container is vacuumed.

FIG. 3 is an enlarged cross-sectional explanatory view showing an ion electrode manufactured according to the present invention.

FIG. 4 is an explanatory view showing a state in which the ion electrode of the present invention is attached to the body of the hardness leak sensor, and a part of the hardness leak sensor is shown in cross section.

[Explanation of symbols]

 1 synthetic resin sheet 2 electrode substrate 3 ion sensitive solution 4 container 7 ion electrode

Claims (1)

[Claims] 1. A method for manufacturing an ion electrode used for a hardness leak sensor, comprising forming an electrode base 2 having a predetermined shape from a porous synthetic resin sheet 1, and then forming the electrode base 2 with an ion-sensitive solution 3. The container 4 is immersed in the container 4
A method for producing an ion electrode, characterized in that the inside of the electrode is vacuum-evacuated and the electrode base 2 is impregnated with the ion-sensitive solution 3.