JPS61196501A - Insulation film former for non-linear resistor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention C: Technical Field of the Invention The present invention provides an insulating film forming apparatus for a non-linear resistor that is capable of coating a non-linear resistor with a uniform thickness in the manufacturing process of applying the insulating film to the non-linear resistor. It is something that depends on.

[Technical background of the invention and its problems] Various types of lightning arresters have been known for protecting electric appliances from abnormal voltages such as lightning surges, and one type of arrester is one in which multiple zinc oxide elements are stacked in series. Is it a predetermined release? I! There are some that are designed to obtain voltage.

As shown in FIG. 4, the configuration of such a conventional lightning arrester is that a terminal 2 is provided on the upper end surface of a closed case 1, a grounding terminal 3 is provided on the lower end surface, and a plurality of terminals are connected between these two terminals. The ceramic elements 4 are arranged in a stacked manner, and the ceramic elements 4 are further surrounded by a capacitor tube 5. This ceramic element 4 has a cylindrical shape as shown in FIGS. 5 and 6, and a special insulating paint 6 is applied to its outer peripheral surface in order to maintain the electrical characteristics of the outer peripheral surface. ing.

As shown in FIG. 7, a conventional method for applying the insulating paint 6 to the outer circumferential surface of the ceramic element 4 described above is to stack the ceramic elements 4 in several tiers on a workbench 7. The insulating paint 6 placed in a container 9 was applied by pouring it from the top.

However, the conventional method has the disadvantage that the thickness of the insulating paint 6 attached to the side surface of the ceramic element 4 is not constant, and as a result, the electrical characteristics on the outer peripheral surface of the ceramic element 4 are not uniform. Furthermore, since the insulating paint 6 also adheres to the top surface of the uppermost layer of the ceramic element 4, there is a drawback that the adhered paint must be removed.

[Object of the Invention] The present invention was proposed in order to eliminate the drawbacks of the conventional insulating coating forming apparatus as described above. It is an object of the present invention to provide an apparatus for forming an insulating film on a non-linear resistor, which makes it possible to obtain a highly reliable lightning arrester by making the thickness uniform and the electrical characteristics on the outer peripheral surface of a ceramic element uniform.

[Summary of the Invention: The insulating film forming apparatus for a non-linear resistor of the present invention includes two sets of tapered rollers arranged opposite each other on a push-up cylinder, and an upper part of the insulating film forming apparatus. A printing plate that is moved left and right by a plate feed cylinder is provided, and a paint supply pipe for supplying insulating paint is provided on this printing plate, and an ink returner and an ink returner for pushing insulating paint into the printing plate are installed in the front and rear clamps. A squeegee is provided for applying the paint to the ceramic element.

With this configuration, the ceramic element is supported on the tapered roller and brought into contact with the printing plate, and the ceramic element is rotated as the printing plate moves, and at this time, the insulating paint inside the printing plate is transferred to the ceramic element. It is designed so that it can be applied to the side surfaces with a uniform film thickness.

[Embodiment of the Invention] Hereinafter, an embodiment of the present invention will be specifically described based on FIGS. 1 to 3. Note that the same members as those of the conventional type shown in FIGS. 4 to 7 are designated by the same reference numerals, and the description thereof will be omitted.

In FIG. 1, an insulating film forming apparatus 10 is provided with a push-up cylinder 11, and four tapered rollers 12 are rotatably provided at the upper end of the push-up cylinder 11.

As shown in FIGS. 2 and 3, this tapered roller 12 has two tapered rows 512 disposed at an interval narrower than the length of the ceramic element 4 so that the tapered parts of the tips thereof face each other. has been done. Furthermore, two tapered rollers 12, which are also located opposite each other, are disposed adjacent to the two tapered rollers 12 with a spacing narrower than the diameter of the ceramic element 4, as shown in FIG. A ceramic element 4 is placed on these two sets of tapered rollers 12.
is set.

On the other hand, a printing plate 13 is disposed above the insulating film forming apparatus 10 so as to be movable in the X-Y direction by a plate feed cylinder 14. This printing plate 13 is coated with insulating paint 6
It has a mesh wire shape and is configured to match the outer circumferential width and outer circumferential length of the ceramic element 4 so as to be able to hold it. Further, at the tip of the front and rear clamps 15, there is an ink returner 16 for pushing the insulating paint 6 supplied onto the printing plate 13 into the portion of the printing plate 13; $46
A squeegee 17 is provided for applying the powder onto the ceramic element 4. Furthermore, an insulating paint supply via 18 is provided next to the front and rear clamps 15, and its tip reaches above the printing plate 13.

The operation of the apparatus for forming an insulating film for a nonlinear resistor according to this embodiment having such a configuration will be described.

That is, the insulating paint 6 that is being supplied onto the printing plate by the paint supply pipe 18 is transferred to the printing plate by moving the plate feed cylinder 14 in the X direction; The amount of paint in 13 is pushed into the section. After the movement in the X direction is completed, the ink returner 16 is held at a position away from the printing plate 13.

Next, the ceramic element 4 is set on the tapered roller 12, and the ceramic element 4 is brought into contact with the lower surface of the printing plate 13 by the push-up cylinder 11. At this time, the squeegee 17 is pressed against the printing plate 13 to move the printing plate 13 in the Y direction. As the printing plate 13 moves, the ceramic element 4 is rotated by the tapered roller 12, and the insulating paint 6 that has been pressed into the printing plate 13 by the squeegee 17 forms a uniform film on the outer peripheral surface of the ceramic element 4. It is applied thickly. At this time, since the ceramic element 4 is supported by a part of the taper of the tapered roller 12,
The insulating paint applied to the outer peripheral surface will not be crushed, and the insulating paint will not adhere to the upper and lower flat parts of the ceramic element 4.

In this way, the insulating paint 6 can be uniformly applied to the outer circumferential surface of the ceramic element 4, so that the electrical characteristics on the outer circumferential surface of the ceramic element 4 can be made uniform, and a highly reliable FF 115t can be achieved. can be obtained.

In addition, in order to change the thickness of the insulating paint when applying the insulating paint to the ceramic element, the amount of paint in the printing plate can be changed by changing the shape of the mesh lines.

[More than the effects of the invention)! As described above, according to the present invention, by setting the ceramic element on a tapered roller and applying the insulating paint while rotating the ceramic element, it is possible to apply the insulating paint with a uniform film thickness, and the ceramic element can be coated with a uniform film thickness. This has the effect of providing an apparatus for forming an insulating film on a non-linear resistor that can even the electrical characteristics of the outer peripheral surface to be uniform.

[Brief explanation of drawings]

Fig. 1 is a front view showing one embodiment of the insulating film forming apparatus of the present invention, Fig. 2 is a side view thereof, Fig. 3 is an enlarged view of the main part of the tapered roller section, and Fig. 4 shows the structure of the lightning arrester. 5 is a side view of the ceramic element, FIG. 6 is a sectional view of FIG. 5, and FIG. 7 is a diagram showing a conventional method of applying an insulating paint. 1... Case, 2... Terminal, 3... Ground terminal, 4
... Ceramic element, 5... Condenser cylinder, 6.
...Insulating paint, 7.Workbench, 8.Case, 9.
... Container, 10 ... Insulating film forming device, 11 ... Push-up cylinder, 12 ... Tapered roller, 1
3... Printing plate, 14... Plate feeding cylinder, 15.
...Front and rear clamps, 16...Ink return, 17...
Squeegee, 18...Paint supply pipe. Figure 1 Figure 2 Figure 4

Claims (1)

[Claims] In an insulating film forming device for applying insulating paint to a non-linear resistor used in lightning arresters, etc., two sets of tapered rollers are disposed adjacent to each other on a push-up cylinder at opposite positions. On the other hand, a printing plate that is moved left and right by a plate feeding cylinder is provided above the insulating film forming device, and a paint supply pipe that supplies insulating paint to reach the top of the printing plate is provided, Further, the front and rear clamps are provided with an ink returner for pushing insulating paint into the paint receptacle network line shape provided in the printing plate and a squeegee for applying the paint to the ceramic element. An apparatus for forming an insulating film on a non-linear resistor, characterized in that an element is supported.