Radial ply tyre carcass tyre facing stepwise molding sulfuration process

A technology for radial tires and treads, which is applied in the field of step-by-step molding and vulcanization of radial tire carcass treads, can solve problems such as tread pattern molding, and achieve the effects of improved tread rubber performance, simple manufacturing process, and easy selection

Inactive Publication Date: 2007-11-28
HAOHUA SOUTH CHINAGUILIN RUBBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to design a radial tire carcass tread step-by-step forming vulcanization process to solve the problem of large construction machinery tire tread pattern forming

Method used

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  • Radial ply tyre carcass tyre facing stepwise molding sulfuration process
  • Radial ply tyre carcass tyre facing stepwise molding sulfuration process
  • Radial ply tyre carcass tyre facing stepwise molding sulfuration process

Examples

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Embodiment 1

[0021] Taking the 36.00R51 giant off-road tire as an example, in the current general production situation, after the carcass is formed, 800kg of tread rubber is pasted, and a flexible mold is used for forming and vulcanization. It is 2900-3000mm, and the tread rubber and belt layer need to stretch 115-165mm outward in the diameter direction, so as to reach the surface of the pattern module of the flexible mold and form the pattern block. After the belt layer is expanded in this way, it is difficult to ensure the performance of the belt layer.

[0022] The step-by-step molding vulcanization process embodiment 1 step of this radial tire carcass tread is as follows:

[0023] I. Tire carcass 1 is formed according to the common production method, but it does not fit 800kg of tread rubber. The weight of the green tire is 2200kg. The outer diameter is 3030mm and the two halves of the mold without pattern are used for pre-vulcanization. The schematic diagram of the green tire is shown...

Embodiment 2

[0029] The procedure of this example is the same as that of Example 1, but in step II, the tread is divided into two types of tread rubber blocks 2 with different sizes, wherein the small blocks contain One pattern weekly section, the large block contains two pattern weekly sections, each with 12 pieces, the dividing line of the tread is a broken line or a curve, that is to say, the dividing surface is a folded surface or a curved surface. The dividing line is located on the tread blocks to increase the bonding area between the tread rubber blocks 2 and increase the mutual bonding force, as shown in FIG. 4 .

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Abstract

The stepped forming and vulcanizing process of producing radial tyre carcass tread for large engineering machine includes the following steps: 1. forming radial tyre carcass without rubber tread conventionally and vulcanizing in no pattern molds; 2. forming 4-40 rubber tread blocks in a hydraulic plate vulcanizing machine and pre-vulcanizing; 3. adhering buffering rubber sheets to the carcass crown; 4. adhering the rubber tread blocks based on the required pattern; and 5. vulcanizing the tyre in a vulcanizing tank at low temperature for long time for combining the tread with the carcass tightly. The present invention has relaxed requirement on the vulcanizing apparatus, simple making process, short production period, high product performance and other advantages.

Description

(1) Technical field [0001] The invention relates to a tire molding vulcanization process, in particular to a step-by-step molding vulcanization process for a carcass tread of a radial tire. (2) Background technology [0002] When ordinary tires are vulcanized, the semi-finished tire blank with tread rubber is placed in the outer tire mold, and under the action of high temperature and high pressure of the inner mold (capsule, water tire, wind tire, etc.), the tire green rubber softens into a viscous fluid state and fully It penetrates into the grooves of the tire mold, and after final vulcanization, it forms a tread pattern that can improve the handling and braking of the tire. For radial tires, in order to ensure that the green tire can be molded smoothly and the mold can be closed smoothly, the diameter of the semi-finished green tire is usually slightly smaller than the diameter of the groove bottom. Therefore, the outer diameter of the green tire should expand by 2 times ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29D30/06B29C35/02B29C65/48
Inventor 蒙毅钊许光明秦明灿
Owner HAOHUA SOUTH CHINAGUILIN RUBBER
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