Butyronitrile canvas filler rubber and preparation method and application thereof

Abstract

The invention provides butyronitrile canvas filler rubber and a preparation method and application thereof. The butyronitrile canvas filler rubber is prepared by applying butyronitrile rubber mixture onto cotton canvas with the unit area weight of 550 to 600g/m<2> and the thickness of 0.62 to 0.66mm, the thickness of the butyronitrile canvas filler rubber is 0.8 to 0.85mm, and the content of the butyronitrile rubber mixture in percentage by mass is 38 to 42 percent. The method first prepares the butyronitrile rubber mixture, then dissolves the butyronitrile rubber mixture into solvent to prepare glue, and then applies the glue onto the cotton canvas to prepare the butyronitrile canvas filler rubber. The butyronitrile canvas filler rubber has high adhesive strength and good storage stability, and a V-shaped ring prepared form the rubber has the advantages of small single product height range and excellent size stability, and can be used for hydraulic cylinder pistons and piston rods with precise height size.

Description

technical field [0001] The invention belongs to the technical field of rubber seals, and in particular relates to a nitrile cloth-coated rubber and its preparation method and application. The nitrile interleaved rubber of the present invention is suitable for manufacturing a combined V-shaped ring that acts as a one-way seal on a hydraulic cylinder piston and a piston rod with a high degree of precision. Background technique [0002] The V-shaped combination ring is a seal with a V-shaped cross section. It is a combination of a pressure ring, several seal rings and a support ring. The seal ring acts as a seal. These three parts must be organically integrated during use. Combined, overlapping use. V-shaped combination rings are very versatile, can seal shafts or holes, and can be used in high and low pressure hydraulic and hydraulic machines, especially for harsh working conditions such as high pressure, large diameter, and long stroke. [0003] The commonly used materials ...

AI Technical Summary

Problems solved by technology

In this way, in the manufacturing process of the cloth V-shaped ring, there are two problems in the height dimension: one is that due to the large thickness of the flash, the height of the product will be higher than the matching height of the mold cavity, and the phenomenon of product padding occurs; Non-uniform flash edge thickness, the height of the entire product along the circumferential direction is not uniform

Since the height dimension of a single V-ring is difficult to control precisely, after multiple pieces are combined, the total height exceeds the design tolerance and the product has a large deviation in the circumferential direction of the combination.

The method of removing the tolerance pre-compensation in the design of the mold cavity height can alleviate some problems of the total height out-of-tolerance, but it cannot fundamentally solve the problem, and this mold compensation method cannot solve the problem that the product height is uniform along the circumferential direction problem, there will still be sites where unilateral or local heights are out of tolerance or insufficient

[0005] The patent application with the application number "200710031582.X" and the title of the invention "a V-shaped sealing ring with fluororubber cloth and its preparation method" introduces a V-shaped sealing ring with fluororubber cloth and its preparation method. The utility model patent ZL03221646.7 discloses a high-temperature and high-pressure-resistant fluororubber-cloth-combined V-ring, but none of these patents involves the issue of how to manufacture a high-precision cloth-clad V-ring

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