Flake graphite composite sealing plate and manufacturing method

A flake graphite and composite sealing technology, which is applied in the manufacture of tools, engine seals, ceramic molding machines, etc., can solve the problems of high content of harmful elements, poor air tightness, poor forming process, etc., and achieve simple forming process and low cost. Low cost, simple and easy controllable forming process parameters

Active Publication Date: 2014-09-10
宜昌星锐烯碳科技有限责任公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Traditional sealing plates are mostly made of asbestos, rubber, metal, polytetrafluoroethylene and other materials. Due to the defects of the materials themselves, the sealing plates made cannot meet the harsh working environment and sealing performance requirements
The flexible graphite plate has good sealing performance and can adapt to a variety of harsh working environments and is favored. However, due to the expansion treatment, the content of harmful elements such as sulfur and chlorine is high, which will inevitably cause galvanic corrosion to the sealing part. In addition, flexible graphite The production cost of the sealing plate is high
Fine flake graphite has many advantages such as high thermal conductivity, low coefficient of friction, low coefficient of linear expansion, high heat resistance, high thermal shock resistance, good chemical stability, good corrosion resistance, etc., but its The disadvantage is poor air tightness and poor forming process, which greatly limits its development and utilization. At present, it is mainly used as raw materials for low value-added industrial products such as graphite crucibles, graphite dishes, lubricants, coatings, etc., and its economic value is low.

Method used

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  • Flake graphite composite sealing plate and manufacturing method
  • Flake graphite composite sealing plate and manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Preparation of flake graphite slurry

[0028] Prepare fine flake graphite slurry with good fluidity, the mass fraction of the slurry is: 25 parts of fine flake graphite powder (this fine flake graphite powder is 200 mesh sieve), 25 parts of organic binder, plasticizer 2.4 parts, 47.6 parts of solvent.

[0029] The above organic binder is: polyvinyl butyral powder and liquid phenolic resin, the mass ratio of which is 3:1.

[0030] Above-mentioned solvent is dehydrated alcohol, and plasticizer is dibutyl phthalate.

[0031] According to the above ratio, put the polyvinyl butyral powder into the liquid absolute ethanol at a speed of 200r / min while stirring, and try to avoid forming agglomerated polyvinyl butyral (due to the formation of agglomerated After polyvinyl butyral, the dissolution time will increase several times), stir on a magnetic stirrer for 35 minutes to completely dissolve the polyvinyl butyral powder, then add liquid phenolic resin and continue for 15...

Embodiment 2

[0039] (1) Preparation of fine flake graphite slurry

[0040] Prepare fine flake graphite slurry with good fluidity. The mass fraction of the slurry consists of: 24.5 parts of fine flake graphite powder (this fine flake graphite powder is a 300 mesh sieve), 19.6 parts of organic binder, plasticizer 1.9 parts, 54 parts of solvent.

[0041] The above organic binder is: polyvinyl butyral powder and liquid phenolic resin, the mass ratio of which is 2:1.

[0042] The above-mentioned solvent is absolute ethanol and acetone, and its composition mass ratio is 3:1, and the plasticizer is dioctyl phthalate.

[0043] According to the above ratio, put polyvinyl butyral powder into absolute ethanol and acetone at an appropriate speed while stirring, and try to avoid agglomerated polyvinyl butyral (due to the formation of agglomerated polyethylene After alcohol butyral, the dissolution time will increase several times), stir on a magnetic stirrer for 30 minutes to completely dissolve the ...

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Abstract

The invention relates to a flake graphite composite sealing plate and a manufacturing method thereof. The flake graphite composite sealing plate has a sandwich type composite structure, and belongs to the technical field of shaping and manufacturing of non-metal materials. The composite sealing plate comprises graphite flake powder, an organic bonding agent, a plasticizer and a solvent. The method comprises multiple process links of preparation of a fine flake graphite sizing agent, removal of the solvent, hot-pressing curing molding and the like. The composite sealing plate is environmental friendly and safe, and is low in cost. The manufacturing method is simple, and can be applied to large-scale production.

Description

technical field [0001] The invention relates to a flake graphite composite sealing plate and a manufacturing method thereof. It belongs to the technical field of non-metallic material forming and manufacturing, and specifically includes the preparation of fine flake graphite slurry, solvent removal, hot-pressing solidification molding and other process links. Background technique [0002] Most of the traditional sealing plates are made of asbestos, rubber, metal, polytetrafluoroethylene and other materials. Due to the defects of the materials themselves, the sealing plates made cannot meet the harsh working environment and sealing performance requirements. The flexible graphite plate has good sealing performance and can adapt to a variety of harsh working environments and is favored. However, due to the expansion treatment, the content of harmful elements such as sulfur and chlorine is high, which will inevitably cause galvanic corrosion to the sealing part. In addition, fle...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16J15/10B28B1/16B28B3/02
Inventor 吴海华李厅黄川刘富林
Owner 宜昌星锐烯碳科技有限责任公司
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