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Arc extinguishing material for fuse and preparation method of arc extinguishing material

A technology of arc extinguishing materials and fuses, which is applied in the manufacture of fuses, electrical components, circuits, etc., can solve the problems of affecting the breaking effect, difficulty in controlling the uniformity of filling density, and high production costs, so as to speed up the arc extinguishing process and contribute to Extinguishing the arc and highlighting the effect of electrical insulation

Active Publication Date: 2018-03-27
东莞市博钺电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since surface mount miniature fuses all have halogen-free requirements, and halogen salts have strong moisture absorption properties, they have a greater impact on the reliability of metal melts during long-term use, so the application range of this improvement is extremely limited. big limit
At the same time, there are still the following problems in using quartz sand as the filler of the fuse: (1) Quartz sand is a mineral, which is greatly affected by the place of origin, and metal impurities such as iron are difficult to remove; It is difficult to control the uniformity of filling density, which affects the breaking effect; (3) The thermal conductivity is large and the heat dissipation is fast, making it difficult for the fuse to break low-power overload
At present, some researchers use arc-extinguishing resins with heat resistance, pressure resistance and molding processability as arc-extinguishing materials. Although such arc-extinguishing materials have relatively high arc-extinguishing properties, they are usually molded, extruded It is difficult to make a slurry into a surface-mounted miniature fuse because it is pressed into a fuse case. At the same time, the arc-extinguishing material has very high requirements on the resin, resulting in high cost of the composition, and the extrusion molding process is used. Equipment such as extruders are required, resulting in high production costs and complicated processes

Method used

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  • Arc extinguishing material for fuse and preparation method of arc extinguishing material
  • Arc extinguishing material for fuse and preparation method of arc extinguishing material
  • Arc extinguishing material for fuse and preparation method of arc extinguishing material

Examples

Experimental program
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Effect test

Embodiment 1

[0029] An arc extinguishing material for a fuse, comprising 0.3 parts of microcrystalline silicon dioxide, 1.2 parts of silicon rubber and 0.5 parts of melamine.

[0030] Method for preparing silicone rubber:

[0031] a. Carry out pretreatment to the microcrystalline silica and melamine of formula quantity, specifically, pass through respectively first

[0032] The upper sieve, and then through the lower sieve, enters the collection tray, the pore size of the upper sieve is 20μ, and the lower sieve

[0033] The aperture of the sieve is 10μ;

[0034] b. Stir the silicone rubber in the formula amount with the microcrystalline silicon dioxide and melamine treated in step a to obtain mixture A. Specifically, put the ultrasonic stirring needle into the collection tray, turn on the power, and stir for 5 minutes to obtain mixture A ;

[0035] c. Put the collection tray containing the mixture A into an oven at 100° C. for 4-4.5 hours to dry to obtain the arc extinguishing material,...

Embodiment 2

[0038] An arc extinguishing material for a fuse, comprising 0.8 parts of amorphous silicon dioxide, 1.0 parts of silicon rubber and 1.0 parts of melamine.

[0039] The preparation method of the arc extinguishing material is the same as that of Example 1.

[0040] The fuse product prepared by using the arc extinguishing material of this embodiment is subjected to a 250Vac / 50A breaking capacity test. The product size is 2.8mm×6.5mm, and the amperage of the product can reach 7A or higher. After the breaking test, the product mark is clear, and the porcelain tube There is no obvious cracking, no continuous arcing phenomenon, and the cotton adhered around the fuse will not be ignited.

Embodiment 3

[0042] An arc extinguishing material for a fuse, comprising 0.6 parts of amorphous silicon dioxide, 0.2 parts of microcrystalline silicon dioxide, 1.0 parts of silicon rubber and 1.0 parts of melamine.

[0043]The preparation method of the arc extinguishing material is the same as that of Example 1.

[0044] The fuse product prepared by using the arc extinguishing material of this embodiment is subjected to a 250Vac / 50A breaking capacity test. The product size is 2.8mm×6.5mm, and the amperage of the product can reach 7A or higher. After the breaking test, the product mark is clear, and the porcelain tube There is no obvious cracking, no continuous arcing phenomenon, and the cotton adhered around the fuse will not be ignited.

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Abstract

The invention belongs to the arc extinguishing material technical field and relates to an arc extinguishing material for a fuse and a preparation method of the arc extinguishing material. The arc extinguishing material provided by the invention includes 0.3 to 1.2 parts by weight of silicon dioxide, 0.6 to 1.2 parts by weight of silicon rubber and 0.1 to 1.0 part by weight of melamine. The components of the arc extinguishing material are simple, easily available, and low in cost; and the arc extinguishing material does not contain water, has moisture-proof performance, and will not affect thelong-term use of a metal melt, and therefore, the service life of the arc extinguishing material can be prolonged, the anti-aging performance of the arc extinguishing material is high, and the formation and diffusion of electric arcs can be well inhibited. When fuses prepared by using the arc extinguishing material are subjected to breaking capacity tests, the amperage of a product of a size of 2.8 mm*6.5 mm can reach 7 A or higher, and the product can meet 250Vac / 50A breaking capacity tests.

Description

technical field [0001] The invention relates to the technical field of arc extinguishing materials, in particular to an arc extinguishing material used for fuses and a preparation method thereof. Background technique [0002] A fuse (fuse) refers to an electrical appliance that fuses the melt with the heat generated by itself and disconnects the circuit when the current exceeds the specified value. It is a current protector. The heat generated by itself melts the melt, thereby disconnecting the circuit. Fuses are widely used in high and low voltage power distribution systems, control systems, and electrical equipment. As short circuit and overcurrent protectors, fuses are the most commonly used protection. One of the devices. [0003] The fuse is mainly composed of melt, fuse tube and external filler. CN102122595A discloses an arc extinguishing agent for fuses. The arc extinguishing agent adds chlorides, such as sodium chloride, potassium chloride, calcium chloride, barium...

Claims

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Application Information

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IPC IPC(8): H01H85/38H01H85/18H01H69/02
CPCH01H69/02H01H85/18H01H85/38H01H2085/388
Inventor 姚明朗
Owner 东莞市博钺电子有限公司
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