JPH0239945B2 - HODENKYOKUBANNOSEIZOHOHO - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a method of manufacturing a discharge electrode plate, and more specifically, to a method for manufacturing a discharge electrode plate, and more specifically, a method for manufacturing a discharge electrode plate, and more specifically, a method for manufacturing a discharge electrode plate, and more specifically, a method for manufacturing a discharge electrode plate, and more specifically, a method for manufacturing a discharge electrode plate, and more specifically, a method for manufacturing a discharge electrode plate, and more specifically, a method for manufacturing a discharge electrode plate. The present invention relates to a method of manufacturing a discharge electrode plate.

[Prior Art] In general, Kottle dust collectors and electrostatic air cleaners used in production are known to utilize the phenomenon of charging dust due to corona discharge. It is said that the sharper the discharge electrode for performing corona discharge in these dust collectors, the better the discharge efficiency, that is, the dust collection efficiency. Therefore, conventionally, two types of discharge electrodes have been employed: a wire discharge electrode and a needle discharge electrode.

[Problems to be Solved by the Invention] However, although the former, that is, the wire discharge electrode, is easy to process and has a simple structure, it has the disadvantage of inferior performance because there is a limit to the thinness of the wire in terms of strength. The latter, that is, the needle-shaped discharge electrode, has excellent performance because the tip of the discharge part a can be made very sharp as shown in FIG. 13, but in order to make the tip of the discharge part a sharp, The drawbacks were that the processing was troublesome, required skill, and the overall structure was complicated.

In addition to the above-mentioned wire discharge electrode and needle-shaped discharge electrode, there is also a discharge electrode plate d in which a pointed discharge projection C is protruded from a metal plate b as shown in FIG. 14 by punching it with a die. However, in the conventional discharge electrode plate d of this type, the tip of the discharge protrusion C is rounded, and it is impossible to form it sharply, making it difficult to improve the dust collection efficiency. I couldn't do it.

[Means for solving the problem] This invention was made in view of the above circumstances, and
In order to solve the above-mentioned technical problem, the first step is to form a concavo-convex portion continuous on one side in the longitudinal direction of the metal substrate by shearing, and to Provided is a method for manufacturing a discharge electrode plate, characterized in that a second step of shearing in the same direction as the shearing direction of the step forms a discharge portion that has an acute angle and becomes thinner toward the tip of the first convex portion. That is.

Specifically, a metal with good conductivity such as iron, stainless steel, aluminum, or galvanized steel plate is used for the metal substrate, and the concave and convex portions that are continuous on one longitudinal side of this metal substrate are cut using an NC cutter. It is formed by shearing or punching.

[Effect] The above technical means works as follows.

By performing the first step of forming continuous uneven parts on one longitudinal side of the metal substrate by shearing or the like, tensile deformation occurs in the protruding parts along the shearing direction,
By performing the second step of shearing in the same direction as the shearing direction of the first step with a cutting line that intersects at an acute angle with one side of the convex portion, tensile deformation occurs in the same direction in conjunction with the above-mentioned tensile deformation, A discharge portion is formed in the convex portion at an acute angle and becomes thinner toward the tip.

[Embodiments] Examples of the present invention will be described in detail below with reference to the accompanying drawings.

1A to 1D are schematic front views showing the steps of the first embodiment of the present invention. In manufacturing a discharge electrode plate, first, a conductive metal substrate 1 as shown in FIG. and after performing a pre-process of forming a continuous rectangular uneven portion 20 on one longitudinal side of the substrate 1 using an NC cutter (not shown), as shown in FIG. This is a case where the manufacturing method of this invention is carried out. That is, first, c
When the inclined shearing process (first step) is performed across the two adjacent sides of the tip side of the convex part 30 as shown in Fig. 3, the sheared part 4 is pulled in the shearing direction of the NC cutter. A tensile deformation 5 as shown in FIG. In this state, as shown in FIG. 2a, a second step is performed in which shearing is performed in the same direction as the shearing direction in the first step with a straight cutting line 6 that intersects at an acute angle with one side of the convex portion 30, that is, with the shearing portion 4. When the process is performed,
In conjunction with the tensile deformation 5 in the first step, a tensile deformation 7 occurs in the same direction, and a discharge portion 10 having an acute angle and becoming thinner toward the tip is formed in the convex portion 30 (FIG. 1d, (See Figure 4). In this case, both the shearing process in the first step and the shearing process in the second step are performed in a straight line, but it is not always necessary to shear in a straight line. A gentle curve with a large radius of curvature 6
Similarly, the convex portion 30 is
The discharge part 10 has an acute angle and becomes thinner toward the tip.
can be formed.

Therefore, according to the manufacturing method of the present invention, the discharge electrode plate 8 having the discharge portion 10 continuous from the metal substrate 1 on one longitudinal side can be formed by a simple operation.

In this case, the metal substrate 1 is made of a metal with good conductivity, such as iron, stainless steel, aluminum, or galvanized steel plate, and the substrate has a thickness of about 0.05 to 3 mm. be done. Also, the angle of the tip of the discharge section 10 is 45
degree or less is preferable. The reason for this is to prevent unnecessary discharge phenomena from occurring in the middle of the discharge section 10.

Figures 5a and 5b are schematic front views of a manufacturing method showing a second embodiment of the present invention, in which the pre-process and the first process of the first embodiment are performed simultaneously to simplify the work process. It is. That is, as shown in FIG.
After performing a punching process such as a press (first step) so that a pair of continuous rectangular uneven portions 20 are formed at the center of the convex portion 30, as shown in FIG. A shearing process (second step) is performed in the same direction as the above-mentioned punching process direction with an inclined cutting line 6 from the base side of one opposing side 3a to the other side 3b toward the tip side. This is the case.

As described above, by forming continuous rectangular concavo-convex portions 20 on the metal substrate 1 in the first step, that is, punching, each side of the convex portions 30 undergoes tensile deformation 5 along the shearing direction, By performing the next shearing in the second step, a tensile deformation 7 is generated in the same direction as the tensile deformation 5 in the first step, and the convex portion 30 has an acute angle and a discharge that becomes thinner toward the tip. A portion 12 is formed (see FIG. 7), and
The discharge electrode plate 8 can be formed with fewer man-hours than in the first embodiment.

FIGS. 8a and 8b are schematic front views of a manufacturing method showing a third embodiment of the present invention, in which sawtooth-shaped uneven portions 22 are added in the first step in place of the rectangular uneven portions 20 of the second embodiment. This is a case where the discharge portion 14 is formed by shearing in the second step after the formation. That is, as shown in FIG. After performing step 1), as shown in FIG. By performing shearing (second step) in the same direction as the punching direction, the convex portion 32 has an acute angle and becomes thinner toward the tip, as in the first and second embodiments. This is the case when forming the portion 14 (see FIG. 10).

In the third embodiment, other parts are the same as those in the second embodiment, so the same parts are given the same reference numerals and the explanation thereof will be omitted.

The discharge electrode plate 8 formed as described above is used, for example, in the charging section 9 of an air purifier as shown in FIG. is installed on the upstream side of the air passage in a state where it is located at the center of the through hole 13 made in the metal plate-shaped discharge counter electrode 11, and the charged electrode plate 15 and the charged counter electrode 17 are placed on the downstream side of the air passage. A dust collection section 19 consisting of
A fan 40 is installed downstream of the fan 9 . In the air cleaner configured as described above, when the fan 40 is driven and a voltage from the power source 50 is applied to the discharge electrode plate 8, the discharge counter electrode 11, and the dust collecting section 19, the contaminated air A in the atmosphere is Dust in the air is charged by the corona discharge caused by the discharge electrode plate 8 and the discharge counter electrode 11, and when this air A passes through the dust collection section 19 on the downstream side, the dust is captured by the charge on the charged electrode plate 15. Only collected and purified air is released into the atmosphere.

In the air purifier described above, a comparative experiment was conducted in which a commercially available needle-shaped discharge electrode, a wire discharge electrode, and a discharge electrode plate manufactured according to the present invention were used in the charging section, respectively, and the dust collection performance was measured. The results shown in FIG. 12 were obtained, and a high dust collection rate was obtained at a low discharge voltage using the discharge electrode plate manufactured according to the present invention.

[Effects of the Invention] As explained above, according to the method for manufacturing a discharge electrode plate of the present invention, the first step of forming a concavo-convex portion continuous on one side in the longitudinal direction of a metal substrate by shearing; A second step of shearing in the same direction as the shearing direction of the first step with a cutting line that intersects one side of the portion at an acute angle forms a discharge portion that has an acute angle and becomes thinner toward the tip of the convex portion. Therefore, a discharge electrode plate having an extremely sharp tip shape can be manufactured quickly, easily, and at low cost.
The manufactured discharge electrode plate has high dust collection performance at a lower discharge voltage than conventional discharge electrodes, and has excellent effects such as simplifying the structure of air purifiers, etc., so its use is highly recommended. The value is outstanding.

[Brief explanation of drawings]

Figures 1 a to d are schematic front views showing the steps of the first embodiment of the method for producing a discharge electrode plate of the present invention, and Figures 2 a and b are enlarged front views showing the second step of the first embodiment, respectively. Figure 3 shows the first example of the first embodiment.
FIG. 4 is a perspective view showing the second step of the first embodiment, FIGS. 5 a and b are schematic front views showing the manufacturing process of the second embodiment of the present invention, and FIG. FIG. 7 is an enlarged front view showing the second step of the second embodiment, FIG. 8 is a perspective view showing the second step of the second embodiment, FIG.
b is a schematic front view showing the manufacturing process of the third embodiment of the present invention, FIG. 9 is an enlarged front view showing the second step of the third embodiment, and FIG. 10 is a schematic front view showing the second step of the third embodiment. FIG. 11 is an exploded perspective view showing how the discharge electrode plate manufactured by the manufacturing method of the present invention is used, and FIG. 12 is a comparison of the discharge electrode plate manufactured by the present invention and a conventional discharge electrode. 13 and 14 are perspective views showing conventional discharge electrodes, respectively. Description of symbols, 1... Metal substrate, 3a to 3c...
One side of the convex part, 4... Shearing part, 5, 7... Tensile deformation, 6, 6a... Cutting line, 8... Discharge electrode plate, 1
0, 12, 14...Discharge portion, 20...Rectangular uneven portion, 22... Serrated uneven portion, 30, 32... Convex portion.

Claims (1)

[Scope of Claims] 1. A first step of forming a concavo-convex portion continuous on one side in the longitudinal direction of a metal substrate by shearing; A method for manufacturing a discharge electrode plate, characterized in that a second step of shearing in the same direction as the second step forms a discharge portion having an acute angle and becoming thinner toward the tip of the convex portion. 2. The method for manufacturing a discharge electrode plate according to claim 1, wherein the first step is a punching process for forming rectangular uneven portions. 3. The method of manufacturing a discharge electrode plate according to claim 1, wherein the first step is a punching process to form sawtooth-like uneven portions. 4. The method for manufacturing a discharge electrode plate according to claim 1, wherein the acute angle is 45 degrees or less.