Vacuum auxiliary exhausting type segmental mold

Abstract

The invention provides a vacuum auxiliary exhausting type segmental mold. The vacuum auxiliary exhausting type segmental mold comprises a bow-shaped seat and a pattern block. Multiple annular exhausting lines located at the various multiple heights and arranged coaxial with a molding cavity of the vacuum auxiliary exhausting type segmental mold and one or more flow collection exhausting lines arranged perpendicular to the annular exhausting lines are limited between the inner side face of the bow-shaped seat and the outer side face of the pattern block, wherein each flow collection exhausting line is communicated with the annular exhausting lines. The pattern block is provided with multiple air flow channel layers located at the various heights. One or more air flow channels are arranged in each air flow channel layer. The outer end of each air flow channel in each air flow channel layer is communicated with the annular exhausting line at the corresponding height and the inner end of each air flow channel in each air flow channel layer is communicated with the molding cavity. In the vulcanizing process, gas in the molding cavity, especially gas in dead corners of the mold can be exhausted smoothly. A vacuum pump is used, so that the pressure in the molding cavity is close to the vacuum degree, the shape of the molding cavity is not affected, and a formed tire can has have the advantages of being small in tire burr number and clear and attractive in pattern edge.

Description

technical field [0001] The invention relates to the technical field of tire manufacturing, in particular to a vacuum assisted exhaust type movable mold. Background technique [0002] The tire flexible mold is the necessary equipment for tire molding. At present, the molding process of automobile tires in the active mold is briefly summarized as follows: firstly, the tire blank is placed in the cavity of the active mold heated to about 180°C, and then inserted into the embryo by the molding bladder clamped in the center mechanism of the vulcanizer. Through gas inflation, the tire blank is pressed to the side wall of the mold cavity and the pattern block. The exhaust hole is passively discharged, so that the tire blank can fill the mold cavity, and the tire blank begins to vulcanize until the shape is completed. There are a large number of vent holes in the cavity pattern of the flexible mold. During the vulcanization molding process, the mold is naturally ventilated. Howeve...

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Problems solved by technology

[0003] The purpose of the present invention is to overcome at least one defect of the existing tire active mold, and provide a vacuum-assisted exhaust type active mold, which can make the cavity exhaust smoothly during the vulcanization process, especially the gas in the dead corner of the mold, Without affecting the shape of the cavity, it can solve defects such as unclear tire tread edges, abnormally large tire embryo size, open tire joints, and large tire rubber edges.

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