Rubber fender mold-free extrusion method

Abstract

The invention discloses a rubber fender mold-free extrusion method. The raw materials include 80-90 parts of styrene-butadiene rubber (SBR), 10-20 parts of CPE (chlorinated polyethylene), 150-160 parts of regenerated rubber, 5-6.5 parts of zinc oxide, 2 parts of light magnesia, 2.6 parts of stearic acid, 1 part of anti-aging agent 4010NA, 1 part of anti-aging agent RD, 8-10 parts of dioctyl phthalate, 1.6 parts of sulfur, 1.3 parts of accelerator NS, 0.4-0.5 parts of accelerator BF, 0.5-0.6 parts of vulcanizer TDDS, 0.4 parts of anti-coking agent CTP, 47 parts of carbon black, 35 parts of light calcium carbonate, 35 parts of sericite powder and15 parts of aromatic oil. The preparation process includes first-stage blending, second-stage blending, sulfur addition, extrusion, vulcanizing and forming. The method adopts novel material proportions and process parameters, to satisfy requirements of shape stability of extruded semi-finished fender product for the extrusion material.

Description

technical field

[0001] The invention relates to a forming method of a rubber fender, in particular to a dieless extrusion method of a rubber fender. Background technique

[0002] Rubber fenders are generally molded. The main disadvantages are: first, the mold investment is large, and a single set of mold generally requires investment

[0003] Hundreds of thousands or even hundreds of thousands of RMB. Second, the molding efficiency is low. It needs to go through mold assembly, molding processing and mold unloading. The production cycle is long. Each set of molds can only process three molds (9-10 meters of rubber fenders) per day. Third, high energy consumption. Since the fender and the metal mold are heated by steam in the vulcanization tank, there are problems of low heating efficiency and large steam consumption.

[0004] If the extrusion method is used instead of compression molding, and the extruded rubber fender is vulcanized at high temperature, it will show a huge...