Manufacturing method of pneumatic tire

A manufacturing method and technology for pneumatic tires, which can be applied to tires, other household appliances, household appliances, etc., can solve the problems of difficult to extrude conductive layers, difficult to control the volume of each layer, etc., and achieve the effect of ensuring electrical conductivity

CN104890214BActive Publication Date: 2017-04-26TOYO TIRE & RUBBER CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2017-04-26

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Abstract

The invention provides a manufacture method for an inflation tyre which is capable of stably manufacturing a annular tyre side rubber member having the conductive layer clamped between the nonconductive layers and guarantees the conductivity. The manufacture method comprises steps of squeezing out the rubber material from the port die (72) from the extruder to the support face, enabling the support face to rotate relative to the die port, extruding the rubber material on the layer-by-layer basis and thus forming an annular tyre side rubber member on the support face, extruding a single structure of the non-conductive layer (54) from the port die (72) in the first coil, extruding the two layers constructed by the non-conductive layer (52) and the conductive layer (54) from the die port and forming the tyre side member (50) which has the conductive layer (54) and is clamped between the non-conductive (52,52).
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Description

technical field

[0001] The invention relates to a method for manufacturing a pneumatic tire. Background technique

[0002] For the purpose of reducing the rolling resistance of a pneumatic tire, it is known to use a non-conductive rubber material mixed with silica in a high proportion to form rubber members such as tread rubber and sidewall rubber. Tires made of this kind of non-conductive rubber are prone to malfunctions such as radio noise, so it is necessary to ensure electrical conductivity.

[0003] As a technique for securing electrical conductivity of tires, in Patent Document 1, it is proposed that the sidewall rubber is formed into a two-layer structure having an inner layer rubber and an outer layer rubber, and these inner layer rubber and outer layer rubber are made Either one of them is formed of conductive rubber, thereby ensuring a conductive path in the sidewall portion. However, in the case of a two-layer structure, for example, if the inner layer rubber is...

Examples

Embodiment Construction

[0056] Embodiments of the present invention will be described below with reference to the drawings.

[0057] like figure 1 As shown, the pneumatic tire 10 of the present embodiment includes: a pair of bead portions 12; a pair of sidewall portions 14 extending from the bead portions 12 outward in the tire radial direction; and a tread portion 16 connecting the two tires. The radially outer ends of the side portions 14 are disposed between the two sidewall portions 14 in relation to each other.

[0058]An annular ply 18 extending across a pair of bead portions 12 is buried inside the tire. The carcass ply 18 is composed of at least one carcass ply, and both ends of the carcass ply 18 are locked to the bead portions 12 . The carcass ply is formed by covering cords arranged in a direction substantially perpendicular to the tire circumferential direction with a topping rubber composed of non-conductive rubber. Inside the carcass 18, an inner liner 20 for maintaining air pressure...