Pressure Mixing Process of Internal Mixer Changing Top Bolt

Abstract

The invention relates to a ram piston pressure variable mixing process of an internal mixer, and belongs to the technical field of tire production and manufacture. The ram piston pressure variable mixing process comprises the steps that feeding is carried out, the ram piston pressure of the internal mixer is constant within 0.1 MPa-0.4 MPa at the beginning, the ram piston pressure is changed to 0.5 MPa-0.6 MPa 1-3 minutes after mixing, the ram piston pressure is changed to 0.1 MPa-0.4 MPa after final discharging, that is, in the mixing process, the ram piston pressure is small, then big and finally is changed to be small, and the rotating speed range of a rotor is 15 rpm-35 rpm. On the premise of not changing an existing production equipment structure, by carrying out pressure changing adjustment on the ram piston pressure of the internal mixer in the mixing process, the problem that when an internal mixer which is provided with a 4WH rotor (a four-edge efficient rotor) and a ZZ2 rotor produces final mixing sizing materials, the rotor and the sizing materials slide is solved. By means of the ram piston pressure variable mixing process, the scrappage caused by scorching of the sizing materials is greatly reduced, the production cost is reduced, and meanwhile the process passing ability of the special sizing materials and the production efficiency are improved.

Description

technical field [0001] The invention relates to a pressure mixing process with an internal mixer variable top bolt, in particular a mixing process invented to meet the design requirements of tire rubber formula, and belongs to the technical field of tire manufacturing. Background technique [0002] In the prior art, in the mixing process of the all-steel radial tire rubber compound internal mixer, the pressure of the top bolt for the final rubber mixing is generally set at 0.5-0.6Mpa, and the set value of the top bolt pressure during the mixing process is constant No change, such a pressure setting can make the mixing achieve the highest production efficiency, but for some specific internal mixers (such as internal mixers equipped with 4WH, ZZ2 rotors) and some special rubber types (ESBR, hard apex rubber) During the final mixing of rubber, there are often problems such as low power, uneven mixing, and loose rubber caused by the slipping of the rotor and the rubber. After th...

AI Technical Summary

Problems solved by technology

[0004] The technical solution of the present invention, on the premise of not changing the structure of the existing production equipment, the present invention solves the problem of equipping 4WH (square high-efficiency rotor), ZZ2 The internal mixer of the rotor has the problem of slipping between the rotor and the rubber material when producing some final mixing rubber, which is all-steel radial tire mining tread with more than 60 parts of ESBR (emulsion polystyrene butadiene) Formula and all-steel radial tire hard apex rubber material, etc., the invention solves the problems of rubber discharge, uneven mixing, and rubber material scorching caused by the slipping of the rotor and the rubber material, and greatly reduces the amount of scrap caused by the rubber material scorching , reduce the production cost, and at the same time improve the process passability and production efficiency of some special rubber types