Preparation method and production device of high-speed rail sealing element

Abstract

The invention discloses a preparation method and a production device of a high-speed rail sealing element. The preparation method comprises the following steps: preparing raw materials; carrying out open mixing on methyl vinyl silicone rubber and fluorinated silicone rubber in an open mill, and uniformly conducting mixing to obtain mixed silicone rubber, feeding the mixed silicone rubber into an internal mixer, adding hydroxyl-terminated polydimethylsiloxane, a silane coupling agent, white carbon black, fumed silica, zinc oxide, an anti-aging agent and a heat stabilizer, conducting mixing for 10-15 minutes at the temperature of 100-105 DEG C, continuously conducting mixing for 8-12 minutes, conducting cooling to the temperature of 105-108 DEG C, adding toluene diisocyanate and a cross-linking agent, continuously conducting mixing for 7-10 minutes, then discharging the rubber, conducting overturning by an open mill, and conducting discharging and cooling; and 2) carrying out calendering molding on the cooled rubber material through a calendering machine, cutting and processing the calendered semi-finished product to form rubber particles with regular shapes, feeding the rubber particles into a mold cavity of a mold, and conducting vulcanizing by a vulcanizing machine to obtain a finished product of a sealing ring.

Description

technical field [0001] The invention relates to the technical field of high-speed iron seal materials, in particular to a preparation method and production device for high-speed iron seals. Background technique [0002] Rubber is the latex taken from plants such as rubber trees and rubber grasses. After processing, it is a material with elasticity, insulation, and impermeability to water and air. High elastic polymer compound. Divided into two kinds of natural rubber and synthetic rubber. Natural rubber is processed by extracting gum from rubber trees, rubber grass and other plants; synthetic rubber is obtained by polymerization of various monomers. Rubber products have unique properties, so rubber is a good raw material for making sealing rings. [0003] Rubber seals are a general basic component in sealing devices. Rubber seals are a type of rubber products widely used in sealing technology. They are widely used due to their small elastic modulus, high elongation, and a...

AI Technical Summary

Problems solved by technology

[0005] 1. The sealing performance is poor, the aging resistance is poor, and it is difficult to achieve both good sealing performance and aging resistance. It is easy to cause poor sealing due to corrosion and aging, and then material waste, mechanical equipment corrosion and other problems, causing major safety issues Hidden dangers, even accidents, cannot meet the performance requirements of high-speed rail seals and other fields;

[0006] 2. Poor elasticity, high compression set rate, poor high temperature resistance and mechanical properties, poor comprehensive performance

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