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Rigid model core and tyre manufacturing method

A technology of rigid core and manufacturing method, which is applied to tires, other household appliances, household appliances, etc., can solve the problems of consuming a lot of time and achieve the effect of shortening the time

Inactive Publication Date: 2014-04-09
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in the extraction process, there is a problem that it takes a lot of time to extract the rigid core from the tire with the rigid core.

Method used

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  • Rigid model core and tyre manufacturing method
  • Rigid model core and tyre manufacturing method
  • Rigid model core and tyre manufacturing method

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Experimental program
Comparison scheme
Effect test

Embodiment

[0095] In order to confirm the effect of the present invention, according to the specifications shown in Table 1, a high-pressure fluid was supplied to a rigid core with a tire vulcanized by a vulcanization mold using a supply device, and the rigid core with a tire was removed from the rigid core with a tire. The core, to make the tire. The size of the tires made in this embodiment are all 235 / 45R17. Also, in this embodiment, compressed air is used as the high-pressure fluid. And, the working time required to remove the rigid core from the rigid core with the tire was measured, respectively. Table 1 shows the measurement results.

[0096] In addition, for comparison, a tire was produced by removing the rigid core from the rigid core with tire without supplying high-pressure fluid to the rigid core with tire after vulcanization molding. Also, the work time required to detach the rigid core from the rigid core with the tire was measured. Table 1 shows the measurement results...

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Abstract

The invention provides a rigid model core and a tyre manufacturing method. High pressure fluid is supplied to a position between the external surface of the rigid model core and the inner cavity surface of a vulcanized tyre to highly effectively pull out rigid model cores. In the tyre (T) manufacturing method, the rigid model core (1) which has a rigid external surface (7a) and of which the inner cavity surface is vulcanized. The tyre manufacturing method comprises a green tyre forming step, where unvulcanized rubber parts are pasted to the external surface of the rigid model core to shaping the green tyre (t), a sulfuration step (S1), wherein the green tyre and the rigid model core are vulcanized and shaped, and a taking out step, where the rigid model core (1) is taken out from a vulcanized tyre. The taking out step comprises a high pressure fluid supplying step(S2), where high pressure fluid is supplied to a position between the external surface of the rigid model core and the inner cavity surface of the tyre.

Description

technical field [0001] The present invention relates to a rigid core capable of efficiently taking out a rigid core from a vulcanized tire and a tire manufacturing method. Background technique [0002] In recent years, in order to improve the forming accuracy of tires, a rigid core including a rigid outer surface has been used. The inner surface of the tire is vulcanized on the outer surface of the rigid core. In the method of manufacturing a tire using such a rigid core, a raw tire molding process is first carried out. The outer surface of the core is used to shape the green tire. Then, a taking-out step is performed in which the rigid core is taken out from the vulcanization-molded tire with the rigid core. [0003] The rigid core includes, for example, a core body formed into an annular shape by connecting a plurality of core segments in the tire circumferential direction, and a core fitted to a center hole of the core body. In the extraction step, first, the core is ...

Claims

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Application Information

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IPC IPC(8): B29D30/08B29C33/76
Inventor 坂本雅之
Owner SUMITOMO RUBBER IND LTD