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Preparation and coating method of a fuse for a wire-wound fuse resistor

A fusing resistor and fusing technology, which is applied to other resistor networks, helical coil/spiral disk resistance elements, coatings, etc., can solve the problem that the fusing agent cannot meet the requirements of high-melting point fuses and fast fusing, and achieve good fusing effect, Excellent overall performance and reduced production costs

Inactive Publication Date: 2018-10-02
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the defect that the fuse used in the wirewound fuse resistor of the prior art cannot satisfy the fast fusing of the high melting point fuse wire, and to provide a 1.14I 0 , Fuse for wirewound fuse resistors that can blow quickly within 90s

Method used

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  • Preparation and coating method of a fuse for a wire-wound fuse resistor
  • Preparation and coating method of a fuse for a wire-wound fuse resistor
  • Preparation and coating method of a fuse for a wire-wound fuse resistor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The raw material components and mass percentages of the fusing agent are:

[0036] Phenolic resin 33.1%, ethylene glycol methyl ether 12.0%, tin powder (300 mesh) 44.5%, magnesium powder (1000 mesh) 3.2%, sulfur powder 4.2%, tributyl phosphate 3%.

[0037] The preparation method of fusing agent is as follows:

[0038] (1) According to the raw material components of the fuse agent, phenolic resin 33.1%, ethylene glycol methyl ether 12.0%, tin powder (300 mesh) 44.5%, magnesium powder (1000 mesh) 3.2%, sulfur powder 4.2%, tributyl phosphate 3 %, weighed separately, and set aside;

[0039] (2) Sulfur powder pretreatment

[0040] 1. The sulfur powder of step (1) is weighed respectively according to the proportioning of sulfur powder 12.5%, dehydrated alcohol 10%, ammoniacal liquor 20%, deionized water 15%, and tetraethyl orthosilicate 42.5%, for subsequent use;

[0041] ②Put the sulfur powder, absolute ethanol, ammonia water and deionized water weighed in step ① into a t...

Embodiment 2

[0053] The raw material components and mass percentages of the fusing agent are:

[0054] 30.3% phenolic resin, 10.8% ethylene glycol methyl ether, 48.8% tin powder (300 mesh), 2.4% magnesium powder (1000 mesh), 5.6% sulfur powder, 2.1% tributyl phosphate.

[0055] In this embodiment, except for the raw material formula of the fusing agent, other process steps are exactly the same as in Embodiment 1.

Embodiment 3

[0057] The raw material components and mass percentages of the fusing agent are:

[0058] 40% phenolic resin, 14% ethylene glycol methyl ether, 37% tin powder (300 mesh), 2% magnesium powder (1000 mesh), 3% sulfur powder, 4% tributyl phosphate.

[0059] In this embodiment, except for the raw material formula of the fusing agent, other process steps are exactly the same as in Embodiment 1.

[0060] The fuse performance test method is as follows:

[0061] The performance of the fuse is reflected by the performance of the wire-wound fuse resistor. The test process is carried out on the special test equipment of Tianjin Shimeite Electronics Co., Ltd. The test shows that, under the rated current of 1.14 times of the fuse resistor, the prepared fuse can make the nickel-iron wire or the nickel-chromium wire fuse resistor fuse within 90s. Afterwards, the 220AC V direct impact test and lightning strike test were carried out according to the company's standards, and the fuse resistors...

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Abstract

The invention discloses preparation and a coating method of a fusing agent for a wire-wound fusible resisto. The fusing agent comprises the raw materials in percentages by mass: 25-40% of phenolic resin, 5-15% of ethylene glycol monomethyl ether, 35-60% of tin powder, 2-10% of magnesium powder, 3-10% of sulfur powder and 2-10% of tributyl phosphate. The preparation method comprises the following steps: first, separately weighing the raw materials for later use; then pre-treating the sulfur powder, wherein the proportion of the pre-treatment is as follows: 12.5% of sulfur powder, 10% of anhydrous ethanol, 20% of ammonia water, 15% of deionized water and 42.5% of tetraethylorthosilicate; and then uniformly mixing the phenolic resin, the ethylene glycol monomethyl ether and the tributyl phosphate, adding the tin powder and the magnesium powder, adding a sulfur powder turbid liquid after being ball-milled, and mechanically mixing the mixture to obtain the fusing agent. The coating method comprises: finally, coating the fusing agent to 2-6 line widths in the middle position of a resistance wire on the resistor; and then drying and coating a heat-isolating layer and an insulating finishing coat. By virtue of the fusible resistor prepared by the invention, the resistance wire can be fused within 90s under a 1.14-time rated current, so that the technical requirements of a high performance charger on the fusible resistor are satisfied.

Description

technical field [0001] The present invention relates to a wire-wound fuse resistor, in particular to a wire-wound fuse resistor at a low rated current I 0 (i.e. 1.14I 0 ) under the preparation and coating method of the fusing agent that can be quickly blown. Background technique [0002] In today's information technology era, terminal electronic devices such as mobile phones, ipads, laptops, and routers are the basis for the realization of information technology, which has a great impact on people's lives and has become an indispensable tool in people's lives and work. The performance of modern electronic technology products is becoming more and more advanced. At the same time, consumers have higher and higher requirements for their performance and safety, because it is related to people's property and life safety. The recent recall of a certain brand of smartphones and the subsequent shutdown of production lines is illustrative of this. Safety determines the fate of an e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D161/06C09D7/61C09D7/63H01C3/20H01C1/16
CPCC08K3/06C08K3/08C08K5/521C08K9/06C08K13/06C08K2201/014C09D7/61C09D7/62C09D7/63C09D161/06H01C1/16H01C3/20
Inventor 王秀宇刘颜鹏丁伯楠李明秀陈同宁
Owner TIANJIN UNIV
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