JPH10289809A - Surge absorber having non-combustibility and explosionproof effect and manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to enable a surge absorber to have a non-combustibility and an explosionproof effect by a method wherein the absorber consists of an insulating layer, which contains a silicone paint, silicone rubber or silicone resin as its main component and is formed on the surface of a surge absorption element main body, and a high heat-resistant protective film for covering the surface of the insulating layer and a bent hole is formed in the protective film. SOLUTION: A silicone resin and an epoxy resin are uniformly stirred and mixed with each other in a weight ratio of 100:0 to 50:50 and thereafter, a catalyst for solidification use is added to the mixed resin and while the mixed solution is stirred, it is deaerated by a vacuum suction unit. A bare surge absorption element main body 20 is temporarily stirred in the deaerated mixed solution and thereafter, is subjected to natural drying. The one subjected to natural drying is roasted to make the one age and solidify and a non-cmobustible insulating layer 30 is formed on the surface of the main body 20. The main body 20 with the layer 30 is covered with a bag made of a high heat-resistant and heat-shrinkable material from its outer surface. After that, this bag is made to thermally shrink to make the bag adhere exactly to the surface of the main body 20. Moreover, a bent hole 41 is formed in a protective film 40.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a surge absorber and a method of manufacturing the same, and more particularly, to a surge absorber having nonflammability and explosion-proof effect and a method of manufacturing the same.

[0002]

2. Description of the Related Art As shown in an explanatory diagram of FIG. 1, in an electric circuit, a surge absorber 10 is sometimes installed in parallel between respective phase contacts of a power supply in order to prevent a power supply surge. Protects load elements and other electrical elements in the circuit.
However, as shown in FIG. 2, the conventional surge absorber 10 usually has a bare surge absorbing element body 11.
, An epoxy resin is applied directly to the surge absorbing element body 1
1 has an insulating layer 12 formed on the surface.

[0003] The conventional surge absorber 10 as described above,
Although the insulating layer 12 is formed, the insulating layer 12 is flammable and has no explosion-proof effect. Therefore, when the surge absorber 10 receives an excessive surge current or surge voltage, the surge absorbing element body 11 is ruptured. In addition, current leaks due to deterioration and the temperature of the surge absorbing element main body 11 rises, and the epoxy insulating layer 12 on the surface ignites and burns, so that the load element and other electric elements are destroyed or used. May affect the safety of the vehicle.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned drawbacks of the conventional surge absorber, an object of the present invention is to provide a surge absorber having nonflammability and explosion-proof effect.

Another object is to provide a method for manufacturing the surge absorber.

[0006]

Means for Solving the Problems In order to achieve the above object, the inventor of the present invention has made a main component of silicone paint, silicone rubber or silicone resin so as to make the surge absorbing element body and the surge absorber nonflammable. An insulating layer formed on the surface of the surge absorbing element body, and a high heat-resistant protective film further covering the surface of the insulating layer so that the surge absorber has explosion-proof properties, and Provided is a surge absorber characterized in that a vent hole is formed in a protective film.

Further, in the method of manufacturing the surge absorber, first, the surge absorbing element main body is formed by (a) 100: 0 to 100:
After uniformly mixing and mixing the silicone and the epoxy resin in a weight ratio of 50:50, a solidification catalyst is added, and the mixture is temporarily immersed in a degassed mixed solution with stirring, air-dried, and then roasted. Baking and aging and solidifying to form a non-combustible insulating layer on the surface of the surge absorbing element body; and forming the surge absorbing element body with the insulating layer from (b) a high heat resistant and heat shrinkable material. After the surface is covered with the coated film, a method of manufacturing a surge absorber is provided, in which the film is heat-shrinked and adheres tightly to the surface as a protective film.

[0008]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 3 is a partially cutaway perspective view of an embodiment of the surge absorber according to the present invention. In the figure, 20
Denotes a substantially disk-shaped surge absorbing element body,
Is an insulating layer formed on the surface of the surge absorbing element main body with silicone paint, silicone rubber or silicone resin as a main component so that the surge absorber has noncombustibility. A high heat-resistant protective film further covering the surface of the insulating layer so as to have a property, and 41 is a vent hole formed in the protective film 40.

The protective film 40 is formed by covering the surface of the insulating layer with a heat-shrinkable bag or a heat-shrinkable film made of a composition comprising polybutylene terephthalate, bakelite and glass fiber, and then heat shrinking. It becomes. With this protective film 40, the surge absorber becomes explosion-proof. The surge absorbing element body 20 is of a zinc oxide type, like the conventional surge absorber 10.

[0010]

[Production Example] A production example of the embodiment of the surge absorber will be described with reference to FIG. As shown in the figure, to manufacture the surge absorber, (a) 10
After uniformly mixing and mixing the silicone and the epoxy resin in a weight ratio of 0: 0 to 50:50, (b) a solidification catalyst is added, and while stirring, (c) deaeration is performed by a vacuum suction device.
(D) Then, the naked surge absorbing element body 20 is temporarily immersed in the degassed mixture, and (e) air-dried.
(F) Then, the air-dried product is roasted and aged and solidified to form a non-combustible insulating layer 30 on the surface of the surge absorbing element main body 20. (g) Then, the surge absorbing with the insulating layer is performed. After the element body is covered from its outer surface with a bag made of a high heat-resistant and heat-shrinkable material, (h) the bag is heat-shrinked and adhered to the surface as a protective film 40 exactly. Can be manufactured.

The above steps (d) and (e) can be repeated twice by repeating the immersion and natural drying.

[0012]

According to the embodiment of the surge absorber manufactured through the steps (a) to (h), an insulating layer mainly composed of nonflammable silicone is provided on the surface of the surge absorbing element body. Even if the surge absorber receives an excessive surge current or surge voltage, or if the current leaks due to deterioration and the temperature of the surge absorbing element body rises excessively, the insulation layer will ignite. There is no danger of burning.
In addition, since the outer surface of the insulating layer is covered with a protective film having high heat resistance, when the surge absorbing element body explodes due to a surge current or a surge voltage, the protective film shields the explosion and reduces personnel. Can be protected. In addition, by the above-described process, it is possible to provide a composite device that is configured by integrating the surge absorbing element body and other electric elements and is integrated, so that it is possible to reduce the man-hour or cost when assembling the printed circuit board. it can.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram for illustrating an application example of a conventional surge absorber.

FIG. 2 is a partially cutaway perspective view of a conventional surge absorber.

FIG. 3 is a partially cutaway perspective view of an embodiment of the surge absorber according to the present invention.

FIG. 4 is a block diagram showing a method of manufacturing the embodiment of the surge absorber of FIG. 3;

[Explanation of symbols]

 Reference Signs List 20: Surge absorbing element body 30: Insulating layer 40: Protective film 41: Vent hole

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Juan Yui Chang Taiwan, Taoyuan Xian, Tashiyen, Kancho Anru, 3 Toan, 10 Cyan, 9 Non, 27 Howe

Claims (6)

[Claims] 1. A surge absorber having non-combustibility and explosion-proof effect, comprising: a surge absorbing element main body; and a silicone paint, silicone rubber or silicone resin as a main component so that the surge absorber has non-combustibility. An insulating layer formed on the surface of the surge absorbing element body, and a high heat resistant protective film further covering the surface of the insulating layer so that the surge absorber has explosion-proof properties; and A surge absorber, characterized in that a vent hole is formed in the surge absorber. 2. The surge absorber according to claim 1, wherein the protection film is formed by covering the surface of the insulating layer with a heat-shrinkable film and then heat-shrinking the insulation layer. 3. The surge absorber according to claim 1, wherein the heat-shrinkable film is a wrapper made of a composition comprising polybutylene terephthalate, bakelite and glass fiber. 4. A surge absorber wherein the surge absorbing element body is of a zinc oxide type. 5. The method of manufacturing a surge absorber according to claim 1, wherein the surge absorbing element body is first prepared by: (a) uniformizing a silicone and an epoxy resin in a weight ratio of 100: 0 to 50:50. After stirring and mixing, a solidification catalyst was added, and the mixture was temporarily immersed in a degassed mixture with stirring and air-dried, and then roasted and aged and solidified,
Forming a non-combustible insulating layer on the surface of the surge absorbing element body; and covering the surface of the surge absorbing element body with the insulating layer with a coating made of a high heat resistant and heat shrinkable material. After that, a method of manufacturing a surge absorber in which this film is heat-shrinked and adhered to the surface as a protective film exactly. 6. A method for manufacturing a surge absorbing element, wherein the immersion or natural drying in the step (a) is repeated twice.