A rotor combined mixing device

Abstract

The invention belongs to the technical field of rubber mixing, and specifically relates to a rotor combined device, which is composed of two upper and lower internal mixers of different sizes connected in series. The upstream internal mixer is a small internal mixer equipped with an automatic cleaning device, equipped with high Dispersed, low-temperature meshing rotor; the downstream internal mixer is a large internal mixer without upper top bolt, equipped with a reaction quadrilateral rotor that not only has the strong shearing effect of the shearing rotor, but also has the distributed mixing effect of the meshing rotor; When refining, the rubber material is first sheared and kneaded at high speed by the meshing rotor of the upstream internal mixer to achieve rapid dispersion, and then the rubber material is secondarily processed by the larger internal mixing chamber and the reaction square rotor of the downstream internal mixer. Secondary mixing, so as to ensure that the silanization reaction is fully and uniformly completed at a constant temperature; the device has a scientific design, simple structure, easy assembly, easy temperature control, safe operation, good mixing effect, and good quality of finished products.

Description

technical field [0001] The invention belongs to the technical field of rubber mixing, and specifically relates to a rotor combined device, which realizes uniform and high-efficiency continuous mixing through the mutual cooperation of the meshing rotor in the upstream internal mixer and the reaction square rotor in the downstream internal mixer. It solves the technical problems such as the difficulty in controlling the temperature of the traditional internal mixer, the uneven proportioning caused by the flying of small materials, and the low efficiency of secondary mixing. Background technique [0002] The internal mixer is one of the most important rubber mixing equipment in the modern rubber industry. Since the real Banbury (Benbury) type internal mixer appeared in 1916, it has a series of features superior to the open mixer, such as Large mixing capacity, short time, high production efficiency, better overcome dust flying, reduce the loss of compounding agents, improve pro...

AI Technical Summary

Problems solved by technology

At present, the main problem of the internal mixer in the prior art is that it is difficult to control the temperature during rubber mixing, and it is necessary to repeatedly cool the rubber material through deceleration or debinding, especially for rubber materials containing white carbon black formula, temperature control is very important. Its silane coupling reaction is extremely important. If the temperature is low, the silane reaction will be very slow, resulting in a decrease in mixing efficiency; and if the mixing temperature is too high, the silane reaction speed will be faster than the dispersion speed of white carbon black, resulting in silanization. Uneven treatment, increased silica network structure, reduced reinforcement, and even scorch; therefore, most internal mixers usually need to redesign the temperature control system, increase the number of rubber mixing times, and lift the bolt many times. Ensure the smooth completion of the silane coupling reaction and the uniform mixing of the rubber

[0003] However, there are also some novel internal mixers in the prior art that can better solve the above problems, such as a double-station series combined internal mixer disclosed in Chinese patent 200710116412.1, which combines the complete internal mixer of the upper station with the lower one The internal mixer with the top bolt removed is connected with the connecting section barrel, which solves the exhaust problem of the single-station internal mixer, but in actual operation, the carbon black, white carbon black, etc. added to the upper station Due to the low density and easy flying of small materials, part of them is sucked out through the exhaust pipe, and the other part is scattered on the upper part of the top bolt, so that the proportion is uneven, which affects the quality of the mixed rubber. Although the fast-feeding type low-temperature rotor adopted by the machine solves the problem of feeding materials, it does not have an efficient secondary mixing function, which affects the efficiency of the entire mixing process; a rubber mixing production line disclosed in Chinese patent 201310058124.0 And the rubber mixing method, it connects the small-scale internal mixer, the large-scale internal mixer, the first open mill, multiple second open-rollers in parallel, and the tablet machine in series to form a flow-type production line. The continuous mixing from addition to sheet discharge also fails to solve the problem of uneven proportioning caused by flying and scattering of small materials during feeding, and the rotor is not optimized for design, making the mixing efficiency still relatively low

We know that the performance of the tandem internal mixer mainly depends on the overall continuity and respective division of labor, as well as the good dispersion of the upstream internal mixer, the good cooling efficiency of the downstream internal mixer, the distribution performance of the rubber material and the ability to eat materials, etc. , the upper internal mixer requires a high-dispersion rotor, and the lower one requires a fast-eating low-temperature rotor. Therefore, after long-term painstaking research, the inventor has designed a tandem type that is composed of an upstream meshing rotor and a downstream reaction quadrilateral rotor. The mixing device is used to solve the problems of uneven proportioning and inaccurate temperature control caused by flying and scattering of small materials, which has good application value and market prospect

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