Heat sensitive rubber mixing method

Abstract

The invention belongs to the technical field of rubber and tire product production, and in particular relates to a novel mixing method suitable for heat sensitive rubber, according to the specific model of an internal mixer and the production formula of the heat sensitive rubber, mass of each material and working parameters of the internal mixer are calculated; base glue and various coordination agents are added into the internal mixer for mixing to form primary mixed glue, and the primary mixed glue is discharged into a storage hopper; the primary mixed glue is pressed into a lump, and pressed into a counter-direction twin-rotor continuous mixer by a feeding port, temperature controlled second section mixing is performed by five section cooling water channels for forming a semi-finished product film, and the semi-finished product film is discharged from a discharge port; finally the semi-finished product film is repeatedly pressed by an open mill, then the semi-finished product film is taken down for subsequent relative process for production of finished product rubber; the method can effectively avoid the coke burning phenomenon, the prepared product has high Mooney viscosity, good carbon black dispersion property, and excellent rubber material comprehensive performance, and the whole method has the advantages of good manufacturability, high degree of automation, simple operation, good process stability, high efficiency and wide application range.

Description

Technical field: [0001] The invention belongs to the technical field of rubber and tire product production, and in particular relates to a novel mixing method suitable for heat-sensitive rubber. Background technique: [0002] Neoprene is a synthetic rubber made of chloroprene as the main raw material through homopolymerization or copolymerization of a small amount of other monomers. It has good physical and mechanical properties, oil resistance, heat resistance, flame resistance, sunlight resistance, ozone resistance, and Acid and alkali resistance, oil resistance, high tensile strength, elongation and reversible crystallinity, good adhesion, excellent comprehensive performance, unmatched by natural rubber and other synthetic rubber, so it is widely used Used in general industrial products, auto parts, wire and cable sheaths and adhesives, etc. The molecular main chain of general-purpose neoprene rubber contains unstable polysulfide segments, which are characterized by easy...

AI Technical Summary

Problems solved by technology

The mixing equipment of chloroprene rubber in the prior art is mainly an open mill and an internal mixer. When using an open mill to mix rubber, because chloroprene rubber is very sensitive to temperature, when the roller temperature exceeds 70 ° C, it will produce Severe sticking of rollers and viscous flow state, the compounding agent is not easy to disperse during mixing, and the labor intensity is high, the mixing time is long and the efficiency is low; when mixing rubber with an internal mixer, due to the large heat generation of neoprene mixing, The temperature is not easy to control, so the temperature in the mixing room will rise quickly, which is easy to cause scorching; therefore, the refining of heat-sensitive rubber materials such as neoprene needs to be carried out at low temperature to ensure the quality and production efficiency of the mixed rubber ; Chinese patent 201310450781.X discloses a neoprene production process, which specifically includes five processes of rubber drying, plasticizing, mixing, semi-finished product cutting and vulcanization. time to ensure the quality of rubber after baking, it adopts two-stage mixing process in the mixing process, and controls the mixing time and discharge temperature to reduce the scorch phenomenon of neoprene; but the method adopts two Intermittent batch mixing needs to be cooled and parked in the middle process, so that the production efficiency is greatly reduced, and there is still a certain scorching phenomenon. Therefore, the present invention researches and designs a new type of heat-sensitive rubber mixing method, which can realize continuous mixing. And effectively avoid the scorching phenomenon, with good market benefits and application value

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