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A vacuum casting mold material for electrical insulating parts and a method for preparing the mold

A technology of vacuum casting and electrical insulation, applied in the field of electrical manufacturing and electrical equipment, can solve the problem of no mold application example, and achieve the effects of significant comprehensive economic benefits, low cost, and reduced labor intensity

Active Publication Date: 2017-02-15
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the medium and low voltage insulation products industry, there is no application example of this type of mold in China

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The vacuum casting mold material for electrical insulating parts in this embodiment is composed of the following raw materials in parts by weight: 100 parts of bisphenol A epoxy resin, the viscosity at 25°C is 6500mPas, and the glass transition temperature is 135°C; 30 parts of tetrahydrophthalic anhydride, the viscosity at 25°C is 2900mPas; 120 parts of metal aluminum powder, the particle size is 4 microns, purchased from Yuanyang Aluminum Co., Ltd., which is the finished product of aluminum powder after silane treatment; 80 parts of alumina powder , the particle size is 320 mesh; 2 parts of black color paste.

[0028] The preparation method of the vacuum casting mold for electrical insulating parts in this embodiment comprises the following steps:

[0029] (1) Preparation of castable:

[0030] Preheat the alumina powder at 110°C for 5 hours, then cool it to 45°C with the furnace temperature for standby; take bisphenol A epoxy resin, metal aluminum powder, methyltetra...

Embodiment 2

[0041] The vacuum casting mold material for electrical insulating parts in this embodiment is composed of the following raw materials in parts by weight: 95 parts of bisphenol A epoxy resin, the viscosity at 25°C is 5800mPas, and the glass transition temperature is 132°C; 25 parts of tetrahydrophthalic anhydride, the viscosity at 25°C is 2700mPas; 110 parts of metal aluminum powder, the particle size is 4 microns, purchased from Yuanyang Aluminum Co., Ltd., which is the finished product of aluminum powder after silane treatment; 60 parts of alumina powder , the particle size is 320 mesh; 2 parts of black color paste.

[0042] The preparation method of the vacuum casting mold for electrical insulating parts in this embodiment comprises the following steps:

[0043] (1) Preparation of castable:

[0044] Preheat the alumina powder at 100°C for 5 hours, then cool it to 40°C with the furnace temperature for standby; take bisphenol A epoxy resin, metal aluminum powder, methyltetrah...

Embodiment 3

[0055] The vacuum casting mold material for electrical insulating parts in this embodiment is composed of the following raw materials in parts by weight: 110 parts of bisphenol A epoxy resin, the viscosity at 25°C is 6800mPas, and the glass transition temperature is 136°C; 35 parts of hexahydrophthalic anhydride, the viscosity at 25°C is 2500mPas; 130 parts of metal aluminum powder, the particle size is 4 microns, purchased from Yuanyang Aluminum Co., Ltd., which is the finished aluminum powder after silane treatment; 80 parts of alumina powder , the particle size is 320 mesh; 2 parts of black color paste.

[0056] The preparation method of the vacuum casting mold for electrical insulating parts in this embodiment comprises the following steps:

[0057] (1) Preparation of castable:

[0058] Preheat the alumina powder at 120°C for 5 hours, and then cool it to 50°C with the furnace temperature for standby; take bisphenol A epoxy resin, metal aluminum powder, methyl tetrahydroph...

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Abstract

The invention discloses a vacuum casting mold material used for electrical insulation parts, and a preparation method of a mold, and belongs to the technical field of electrical manufacturing and power equipment. The mold material is mainly composed of the following raw materials by weight: 95-110 parts of bisphenol-A type epoxy resin, 25-35 parts of an anhydride curing agent, 110-130 parts of metal aluminium powder and 60-80 parts of alumina powder. According to the invention, an epoxy resin casting material is adopted; a conventional casting technology and a rapid forming technology are combined; the time required by the method is about 1 / 3 of a conventional mold processing method; and the method has the characteristics of short mold preparation period, low cost, high precision and long service life. Besides, the mold has light weight, can be repaired easily, can meet production and use requirements well, can reduce labor intensity significantly and has significant economic benefits. Thermal conductivity, and mechanical and technological performances of the mold can meet requirements for a manufacturing process of the electrical insulation parts; heat conductivity coefficient of the mold is 2.5-5.4 W.m<-1>K<-1>; a tensile strength is 75-105 MPa; and a compression strength is 180-220 MPa.

Description

technical field [0001] The invention specifically relates to a vacuum casting mold material for electrical insulating parts and a preparation method of the mold, belonging to the technical field of electrical manufacturing and power equipment. Background technique [0002] With the gradual development of industrial production in the direction of multi-variety, small batch, high-quality, and low-cost, people began to require control of the development cycle and manufacturing cost of molds (key process equipment for manufacturing various products). Epoxy resin casting molds are classified according to different structures and uses, such as insulation products for switch cabinets. Due to their small size, the number of molds for the same type of products in mass production is large, and the precision requirements are not too high, epoxy resin casting molds are used. The molding cycle can be shortened, repetitive molds can be produced in batches, and the raw materials used in ep...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L63/02C08G59/42C08K9/06C08K3/08C08K3/22
Inventor 陈晓丽史鸿威陈延辉龚浩李杏龙宋晓光王茂玉
Owner STATE GRID CORP OF CHINA
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