Rubber mixing and extruding device

Abstract

The invention discloses a rubber mixing and extruding device which comprises a main extruder and an auxiliary extruder, the main extruder and the auxiliary extruder are in right-angle butt joint, and the main extruder fully mixes a rubber compound with a vulcanizing agent and an accelerant or sulfur-containing rubber master batch which are uniformly compacted by the auxiliary extruder and then mixes the rubber compound at a low temperature; the main screw is composed of a main mandrel and a main screw head, and the auxiliary screw is composed of an auxiliary mandrel and an auxiliary screw head. The feeding section and the mixing section are of single-head thread structures with the same thread section and are large in thread pitch, the compaction section is of a single-head thread structure with the small thread pitch, the transmission pressurization section and the transmission pressure reduction section are each of a gradual change type thread structure, the depth of a thread groove of the mixing section is small, two-way threads are machined on the surface of the mixing section, and the reverse mixing section is of a double-head two-way thread structure. The spiral groove depth of the reverse mixing section is deeper than that of the mixing section; the main extruder compacts materials through the small-pitch compaction section, the auxiliary extruder is pressurized and compacted through the flow channel with the flow decreasing gradually, and the mixing effect is enhanced through the combination mode of the gradually-changed threads of the transmission pressurization section, the pin and the internal threads of the machine barrel.

Description

technical field [0001] The invention relates to the technical field of rubber extrusion molding equipment, in particular to a rubber mixing extrusion device. Background technique [0002] At present, the final mixing of rubber is an indispensable and important step in rubber processing, which is to add sulfur and accelerator to the rubber compound without adding sulfur and accelerator after mixing by internal mixer or open mill, and make it evenly mixed After the film. [0003] At present, the final refining of rubber is mainly carried out on open mills or internal mixers. The factory is often a relatively closed and limited space. When adding vulcanization, powdery sulfur will diffuse into the air and explode when it reaches a certain concentration. Has a greater security risk. At the same time, sulfur is toxic. Long-term exposure to sulfur-filled air will cause various adverse reactions, such as cough, sore throat, and skin inflammation, after the human body has inhaled ...

AI Technical Summary

Problems solved by technology

[0003] At present, the final refining of rubber is mainly carried out on open mills or internal mixers. The factory is often a relatively closed and limited space. When adding vulcanization, powdery sulfur will diffuse into the air and explode when it reaches a certain concentration. Has a greater security risk

At the same time, sulfur is toxic. Long-term exposure to sulfur-filled air will cause various adverse reactions, such as cough, sore throat, skin inflammation, etc.

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