Extrusion molding and presulfurization integrated device for short fiber radial orientation strengthened annular tread

Abstract

The invention discloses an extrusion molding and presulfurization integrated device for a short fiber radial orientation strengthened annular tread. The extrusion molding and presulfurization integrated device comprises an inlet section, a transition section, a flow dividing section, a setting section and a presulfurization device. A cylindrical runner in the flow dividing section is subjected to 90 degrees of deformation firstly, and a flow dividing column with the cross section being hexagonal is arranged in the deformed center of the runner of the flow dividing section. The tail end of the flow dividing column is connected with the setting section. The setting section is composed of an upper setting plate, a lower setting plate and an interplate die cavity. Runners in the setting section take the center of the setting section as a starting point. Rubber is extruded along the six runners with the equal cross sections, runner openings are opposite to the edges of the hexagon, and the cross sectional area of the flow dividing column is one half of that of a cylindrical structure. The presulfurization device with the partitioning tyre pattern face is arranged outside the setting section in a matched mode. According to the extrusion molding and presulfurization integrated device for the short fiber radial orientation strengthened annular tread, the technical problem that in the prior art, when the short fiber rubber is vulcanized in a tyre segment mould, the short fiber movement direction is changed, so that the orientation degree is reduced is solved, the radial orientation degree of fiber strengthened thread rubber is increased, and a novel method for the short fiber radial orientation is put forward.

Description

technical field [0001] The invention relates to an integrated device for extrusion molding and pre-vulcanization of fiber orientation reinforced remanufactured tire tread, especially for short fiber radial orientation reinforced annular tread extrusion molding pre-vulcanization integrated device Background technique [0002] With the rapid development of the automobile industry, my country's annual output of waste tires is also the largest in the world. As solid waste, waste tires are a kind of "black pollution". How to clean and recycle waste tires with high value has become a major issue. At present, the recycling of waste tires mainly includes tire retreading, production of rubber powder, production of reclaimed rubber, and cracking of waste tires. Among them, tire retreading is the preferred method of waste tire recycling, which has the advantages of being the most environmentally friendly and resource-saving, and has become a waste tire recycling method commonly used i...

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Problems solved by technology

[0006] The method and principle of radial orientation of short fibers in the above invention patents are all based on the characteristics of rubber extrusion expansion, so that the short fibers in the tread rubber roll along the expansion direction during the expansion process of the rubber material, showing a tendency to tilt , and finally make the radial orientation of the short fibers; but even if the extruded rubber can be better radially oriented, if the general extruded rubber strips in the prior art are to be vulcanized, the extruder needs to be connected to the tire through a pipeline. Mold, the extruded rubber strip passes through the mold sleeve or the upper and lower molds of the tire active mold, and slowly fills the entire tire mold cavity. The short fibers in the rubber material change in the moving direction of the tire active mold, and its orientation state changes. In actual production There is no meaning in it, and it cannot be applied to large-scale industrial production, and the original radial orientation head has high requirements for machining accuracy and high manufacturing cost

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