Radial Orientation Molding Method of Short Fibers in Tire Tread Rubber

Abstract

The invention discloses a radial orientation forming method of short fiber in tire tread rubber. A device for achieving the radial orientation forming method of the short fiber in the tire tread rubber comprises an inlet section, a transition section, a flow distributing section and a shaping section. A cylindrical flow channel in the flow distributing section is deformed at 90 degrees, a flow distributing column is arranged at center of the deformed flow channel in the flow distributing section, and the cross section of the flow distributing column is a hexagon. The tail end of the flow distributing column is connected with the shaping section. The shaping section is composed of an upper shaping plate, a lower shaping plate and an inter-plate mold cavity. A flow channel in the shaping section starts from the center, rubber materials are extruded along six equal-cross-section flow channels, and flow channel openings are opposite to the edges of the hexagon. The cross section area of the flow distributing column is one second that of a cylindrical structure. A pre-vulcanizing device which partitions the tire pattern tread is arranged outside the shaping section in a matched manner. The device for achieving the radial orientation forming method of the short fiber in the tire tread rubber solves the technological problem that in the prior art, when the short fiber rubber materials are vulcanized in a tire segmented mold, the movement direction of the short fiber changes, and then the orientation degree is lowered; and the radial orientation degree of the fiber-reinforced tread rubber is improved, and the novel radial orientation forming method of the short fiber is put forward.

Description

technical field [0001] The invention relates to a fiber orientation reinforced remanufactured tire tread extrusion molding pre-vulcanization integrated device, in particular to a radial orientation molding method for short fibers in tire tread rubber realized in the 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 in developed countries....

AI Technical Summary

Problems solved by technology

[0007] In order to change the traditional method and principle of short fiber radial orientation, and overcome the technical problem in the prior art that the short fiber rubber compound is vulcanized in the tire active mold, the short fiber movement direction changes, the present invention provides a short fiber diameter An integrated device for extrusion molding and pre-vulcanization of orientation reinforced annular tread and a molding method for radial orientation of short fibers in tire tread rubber realized in this device, the device includes an inlet section, a transition section, a split section, a shaping section, The end of the section is connected with the splitter section. The cylindrical flow channel in the splitter section is deformed at 90 degrees first. A splitter column with a hexagonal cross section is installed in the deformed splitter section. The splitter column is fixed at the center of the shaping section, and the shaping section passes through The hexagonal stud is connected with the splitter section, the splitter column and the center part of the shaped section have a smooth transition, the end of the splitter column is connected with the shaped section, and the shaped section has six equal-section flow channels, the flow channel opening is opposite to the hexagonal side, and the cross-section of the splitter column The area is 1 / 2 of the cross-sectional area of ​​the cylindrical structure. There is a pre-vulcanization device for the tire pattern surface outside the shaping plate. The pre-vulcanization device is fitted with the upper shaping plate and the lower shaping plate; Pyramid, which is convenient for the rubber material to be evenly guided into each flow channel of the shaping section by the splitter column. The end of the transition section is connected to the splitter section. The cylindrical flow channel in the splitter section is deformed at 90 degrees first, and smoothly transitions from horizontal extrusion to longitudinal extrusion. During the extrusion process, the rubber will be burned due to material accumulation

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