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Pneumatic tire forming device and forming method

A technology for pneumatic tires and supports, which is applied to tire parts, tires, tire edges, etc., can solve the problems of increased radial deviation and deterioration of durability, and achieve the effect of improving high-speed durability

Active Publication Date: 2017-01-18
TOYO TIRE & RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, with this strip combination method, at the end of winding, the joint 13 is close to the forming drum 2, so the joint 13 contacts the rubber strip S already wound on the forming drum 2 and crushes the rubber strip, thus becoming RFV (radial Force variation) or RRO (radial runout) increase, the main cause of deterioration of high-speed durability

Method used

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  • Pneumatic tire forming device and forming method
  • Pneumatic tire forming device and forming method
  • Pneumatic tire forming device and forming method

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Embodiment Construction

[0031] Hereinafter, embodiments of the present invention will be described with reference to the drawings. figure 1 It is a cross-sectional view schematically showing an example of a molding apparatus for a pneumatic tire of the present invention. This forming device includes an extruding device 1 , a forming drum 2 (corresponding to a rotating support in the present application) around which a rubber strip S discharged from the extruding device 1 is wound, and a control device 3 .

[0032] The extruder 1 includes: an extruder 11 for kneading and conveying a rubber material; a gear pump 12 connected to the front end side of the extruder 11 in the extrusion direction; and a joint 13 connected to the further front end side. The extruder 11 has a cylindrical column 11a, a hopper 11b connected to the supply port of the column 11a, a screw 11c for kneading rubber materials and conveying them to the front end, and a third servo as a driving device for rotating the screw 11c. Motor...

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Abstract

The present invention provides a molding device and molding method of a pneumatic tire capable of molding a pneumatic tire with improved high-speed durability while limiting increases in RFV and RRO. The forming device of the pneumatic tire of the present invention comprises: an extruder (11), kneading and conveying rubber materials; a joint (13), installed at the front end of the extruder (11); ) of the rubber strip (S) discharged from the discharge port (131); wherein the joint (13) is on the end face (13a) opposite to the rotating surface (2a) of the forming drum (2) and is closer to the forming than the discharge port (131) A receiving part (132) capable of receiving the rubber strip (S) that has been wound on the forming drum (2) is formed on the rear side in the rotation direction (R) of the drum (2).

Description

technical field [0001] The present invention relates to a forming device and forming method of a pneumatic tire, which are used to form a pneumatic tire by winding a rubber strip discharged from a joint installed at the front end of an extruder on a rotating support. Background technique [0002] like Figure 9 As shown, the pneumatic tire is constituted by combining various rubber components such as sidewall rubber 7 , tread rubber 8 , and inner liner rubber 9 . [0003] As a method of molding these rubber members, a so-called strip-forming method in which a rubber strip is wound in a circumferential direction to form rubber members is known (for example, Patent Documents 1 and 2 below). According to the above-mentioned strip assembly method, rubber strips having a desired cross-sectional shape can be molded by winding rubber strips around a rotating support such as a forming drum and stacking them sequentially. [0004] In the following patent document 3, the following ti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29D30/20B60C15/00B29C48/30
CPCB29D30/0016B29D30/60B29D2030/0038B29C48/0021B29C48/07B29C48/387
Inventor 西川修一
Owner TOYO TIRE & RUBBER CO LTD