Unlock instant, AI-driven research and patent intelligence for your innovation.

Processing method of sealing part resistant to acid and alkali

A processing method and technology for sealing parts, applied in the field of sealing parts processing, can solve the problems of sealing parts such as hardness, low temperature resistance, poor acid and alkali corrosion resistance, strong toxicity and pollution, etc., and achieve good flexibility and plasticity. Improve acid and alkali resistance and improve the effect of chemical stability

Inactive Publication Date: 2017-12-29
宁国市宁和密封件厂
View PDF0 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention addresses the existing problems: the environment used by the seal is relatively harsh, and it needs to withstand high temperature, high pressure, and acid-base corrosion. The seal is in a state of acid-base corrosion for a long time, which will cause the seal to gradually age and fall off. , and the hardness and high temperature resistance of the seal are gradually reduced; while the traditional natural rubber has poor acid and alkali corrosion resistance, while artificial rubber has strong corrosion resistance, but its hardness is too strong and its flexibility is poor. The machinery cannot play a buffer role, the plasticity is not strong, and it has strong toxicity and pollution

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A method for processing an acid and alkali resistant seal, comprising the following steps:

[0017] (1) Sol: Heat natural rubber, fluororubber and ethylene-propylene rubber to 220°C to blend and stir for 22 minutes, and keep the temperature at a constant temperature for 1.5 hours, then lower the temperature to 182°C and add carbonized fiber, stearic acid and other ingredients in turn, use Stir with a high-speed stirrer for 36 minutes, keep at a constant temperature for 52 minutes, and make a colloid after cooling;

[0018] (2) Masticating and mixing: plasticizing and mixing the colloids to obtain mixed rubber;

[0019] (3) Molding: Heat the mixed rubber to 172°C and inject it into the seal mold, then ultrasonically oscillate for 15 minutes, cool down to 89°C at a cooling rate of 3°C / min, press 0.46MPa, keep the constant temperature for 1.5h, and make the primary seal after cooling ;

[0020] (4) Vulcanization: Put the primary seal in a vulcanization tank for vulcaniza...

Embodiment 2

[0026] A method for processing an acid and alkali resistant seal, comprising the following steps:

[0027] (1) Sol: Heat natural rubber, fluororubber and ethylene-propylene rubber to 230°C to dissolve and stir for 24 minutes, and keep the temperature at a constant temperature for 2 hours, then lower the temperature to 185°C and add carbonized fiber, stearic acid, etc. Stir with a stirrer for 37 minutes, keep at a constant temperature for 54 minutes, and make a colloid after cooling;

[0028] (2) Masticating and mixing: plasticizing and mixing the colloids to obtain mixed rubber;

[0029] (3) Molding: Heat the mixed rubber to 175°C and inject it into the seal mold, then oscillate ultrasonically for 16 minutes, cool down to 91°C at a cooling rate of 3°C / min, press 0.56MPa, keep the temperature at a constant temperature for 2 hours, and make the primary seal after cooling;

[0030] (4) Vulcanization: Put the primary seal in a vulcanization tank for vulcanization treatment, the p...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a processing method of a sealing part resistant to acid and alkali. The processing method is characterized by comprising steps as follows: (1) rubber melting and mixing: natural rubber, fluororubber and ethylene propylene rubber are heated and mixed, and carbonized fibers, stearic acid and other preparation components are added; (2) plastication and mixing: rubber is processed with plastication and mixing processes, and mixed rubber is prepared; (3) forming: the mixed rubber is heated to 170-176 DEG C and injected into a sealing part mold, and the temperature is kept at 87-92 DEG C for 1-2 h; (4) vulcanization: a primary sealing part is put in a vulcanizing tank for vulcanizing treatment; (5) oxidation treatment: the vulcanized sealing part is put in a vacuum tank for oxidation treatment.

Description

technical field [0001] The invention belongs to the technical field of seal processing, and in particular relates to a processing method for acid and alkali resistant seals. Background technique [0002] The seal is used to fill the gap of the mechanical joint, which has the function of preventing internal oil or gas from leaking to the outside, and also isolates external gas, dust and other debris from entering the inside of the machine, resulting in a decrease in mechanical performance. It has waterproof, dustproof, and air leakage prevention. effect. Its main processing material is natural rubber or artificial synthetic rubber. Natural rubber is environmentally friendly, low in toxicity, less polluting, and has a good degradation effect; however, the environment used by the seal is relatively harsh, and it needs to withstand high temperature, high pressure and acid. Alkali corrosion, the seals are in acid and alkali corrosion for a long time, which will cause the seals t...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C08L7/00C08L27/12C08L23/16C08L101/02C08K13/04C08K7/06C08K5/09C08K3/16C08K3/36C08K3/34
CPCC08L7/00C08L2201/08C08L2205/035
Inventor 张文尧
Owner 宁国市宁和密封件厂