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rigid core

A technology of rigid cores and rigid balls, applied in the field of rigid cores, can solve the problems of difficult to achieve high precision and high stability assembly of rigid cores, difficult to determine the positioning of core segments, and impractical

Active Publication Date: 2016-01-20
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in this structure, the automatic removal of the bolt (e) is not easy to achieve, there must be many bolts that need to be tightened
Therefore, the operation of disassembly and assembly of the rigid core (a) requires a lot of work, and it is not very feasible
Furthermore, it is difficult to decide on the positioning of each of the core segments (c), and this is less precise
Therefore, it is difficult to realize the assembly of the rigid core with high precision and high stability (a)

Method used

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Embodiment Construction

[0035] Hereinafter, embodiments of the present invention will be described.

[0036] Such as figure 1 As shown, the rigid core 1 of this embodiment includes an annular core body 3 . This core main body 3 is provided with a molding surface 2 for forming a cavity surface Ts of the pneumatic tire T on the outer surface. On the molding surface 2 of the rigid core 3, the constituent members are adhered in sequence so as to form an unvulcanized tire. Tire components include inner liner, carcass ply, belt layer, sidewall rubber, tread rubber, etc. Then, the unvulcanized tire is put into a vulcanization mold together with the rigid core 1 for vulcanization. figure 1 A state is shown in which the rigid core 1 is removed from the vulcanization mold together with the vulcanized pneumatic tire T and transferred onto the holding shaft 4 .

[0037] The rigid core 1 includes a core main body 3, a cylindrical core 5, and a pair of side plates 6L, 6U. The cylindrical core 5 is inserted ...

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Abstract

A rigid core (1) is efficiently, stably and very accurately assembled and disassembled without using a bolt. The rigid core (1) is provided with: a core body (3) comprising a plurality of core segments (9) divided in the circumferential direction of the tire; a cylindrical core (5) for preventing the movement of each core segment (9) toward the inside in the radial direction, and inserted into the center hole of the core body (3); and a pair of side plates (6L, 6U) for preventing the movement of each core segment (9) in the axial direction thereof, by being positioned on both sides in the axial direction of the core body (3), and by sandwiching and holding the core body (3) between the inside surfaces thereof. A first dovetail part (16) is formed on the outer circumferential surface of the core (5), and a second dovetail part (17) for engaging with the first dovetail part (16) is formed on the inner circumferential surface of each core segment (9). The side plate (6L, 6U) on one side is fixed to the end of the core (5) on one side thereof, and the side plate (6L, 6U) on the other side is detachably joined to the core (5) by a joining mechanism (23) having a ball lock mechanism.

Description

technical field [0001] The present invention relates to a rigid core that is detachable from a pneumatic tire and remountable with high precision and efficiency. Background technique [0002] Recently, such as Figure 11 As shown in (A), in order to improve the forming accuracy of a pneumatic tire, there is a proposed vulcanization method for a pneumatic tire (for example, Patent Document 1). The method uses a rigid core (a) having an outer shape corresponding to the shape of the tire inner surface of the finished vulcanized tire. On the rigid core (a), tire constituent members such as the inner liner, carcass ply, belt layer, sidewall rubber, and tread rubber are sequentially adhered to the rigid core (a) to form an unvulcanized tire (t). An unvulcanized tire (t) is put into a vulcanization mold (b) together with a rigid core (a), and the tire ( t) Vulcanization is carried out. [0003] Such as Figure 11 As shown in (B), in order to divide the rigid core (a) into sever...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29D30/12B29C33/02B29C35/02B29L30/00
CPCB29D30/0661B29D30/12
Inventor 鬼松博幸
Owner SUMITOMO RUBBER IND LTD