Manufacturing method of pneumatic tire
A technology for a pneumatic tire and a manufacturing method, which can be applied to tires, other household appliances, household appliances, etc., can solve the problems such as the decrease of the detachability of the rigid core a, and achieve the effects of preventing peeling and improving the detachability.
Active Publication Date: 2017-11-17
SUMITOMO RUBBER IND LTD
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- Application Information
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Problems solved by technology
Due to such a large friction, the rubber strip g forming the lining d of the inner cavity surface h tends to be peeled off, and there is a problem that the detachability of the rigid core a tends to decrease.
Method used
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Embodiment
[0070] Based on the manufacturing method of the present invention, tires using the rubber strips shown in Table 1 were produced, and the detachability of their rigid cores and the productivity of the inner liner were evaluated. In addition, for comparison, such as Picture 11 As shown in (a), the same evaluation was performed on a tire in which a rubber strip was pasted in a spiral shape from the inner side to the outer side in the tire radial direction to form an inner liner. Among them, the common specifications are as follows.
[0071] Tire size: 235 / 40R19
[0072] Number of sectors of rigid core: 8
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Abstract
The present invention provides a method of manufacturing a pneumatic tire capable of improving the detachability of a rigid core. This method manufactures a pneumatic tire (1) by core forming. This manufacturing method includes: a green tire forming step (S1) of attaching tire components to the outer surface (18) of the rigid core (10) to form a green tire (1L); and a vulcanization step of vulcanizing the green tire (1L) ( S2 ); a rigid core removal process ( S3 ) of removing the rigid core ( 10 ) from the vulcanized tire ( 1 ). The raw tire forming process (S1) includes an inner liner forming process (S11), at least a pair of bead forming surfaces (18c, 18c) in the outer surface (18) of the rigid core (10), respectively forming strip-shaped rubber The side edges (24t) of the strip (24) overlap each other, and the rubber strip (24) is pasted in a spiral form from the outer side toward the inner side in the tire radial direction, thereby forming the bead portion side area (9c) of the inner liner (9). ).
Description
Technical field [0001] The present invention relates to a method for manufacturing a pneumatic tire capable of improving the detachability of a rigid core. Background technique [0002] In recent years, in order to improve the uniformity of tires, proposals have been made to manufacture pneumatic tires using a rigid core, which has an outer surface that shapes the inner cavity surface of the tire (see Patent Document 1 below) . For example, a plurality of sectors are connected along the tire circumferential direction to assemble a rigid core. By sequentially moving the sectors of the rigid core toward the inner side in the tire radial direction, the sectors can be detached from the pneumatic tire. [0003] In the method of manufacturing a pneumatic tire using a rigid core, first, a green tire forming step is performed in which tire components are adhered to the outer surface of the rigid core to form a green tire. Next, a vulcanization process of vulcanizing the green tire toget...
Claims
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IPC IPC(8): B29D30/16B29D30/10
Inventor 坂本雅之
Owner SUMITOMO RUBBER IND LTD
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