Composite seal ring and manufacturing process thereof

Abstract

The invention discloses a composite seal ring and a manufacturing process of the composite seal ring, and belongs to the field of manufacturing of a rubber seal ring. The composite seal ring comprises the materials of 10-100 parts of natural rubber, 10-100 parts of butadiene styrene rubber, 10-100 parts of high styrene resin, 2-10 parts of zinc oxide, 1-3 parts of stearic acid, 0.5-2 parts of accelerant DM, 0.5-2 parts of accelerant CBS, 1-3 parts of antiager RD, 1-3 parts of antiager 4010NA, 2-10 parts of petroleum resin, 20-100 parts of high abrasion furnace black, 20-100 parts of general purpose furnace black, 0.5-4 parts of sulphur, and 3-20 parts of vinylon cut fiber masterbatch. The manufacturing process provided by the invention innovatively manufactures the vinylon cut fiber masterbatch first, and additionally uses a short fiber to directionally arranged in the rubber during extruding formation, so that a working surface has a higher tear strength, and the subsection sulfuration in the sulfuration process leads to uniform and consistent sulfuration degree. The seal ring manufactured by using the manufacturing process has the effects of low compression deformation, excellent elasticity, high hardness, excellent tearing strength, and good sealing effect.

Description

technical field [0001] The invention relates to the manufacturing field of sealing rings made of rubber materials, in particular to a composite material sealing ring and a manufacturing process thereof. Background technique [0002] Domestic ductile iron pipe enterprises need to carry out hydrostatic test for each cast pipe during factory inspection. Both ends of the cast pipe socket should be sealed with sealing rings, and water should be injected into the cast pipe to reach the specified nominal pressure for a period of time. The contact area at the spigot end of the cast pipe is very small, so it needs to bear a large mechanical shear force. The currently used sealing ring products cannot meet the needs of such production operations, and often appear tearing, deformation, etc. within a short period of time and lose their use value. The main reason is that the formula design is unreasonable: the original product rubber formula design Ordinary rubber is generally used, whi...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems existing in the prior art that the rubber sealing ring used for hydrostatic testing has poor tear resistance, low hardness, large compression set and aging resistance, the present invention provides a composite material sealing ring and its manufacturing process