TH34685B - Pneumatic Tires and Methods for Manufacturing Pneumatic Tires - Google Patents

Abstract

DC60. The purpose of the invention is to prepare a pneumatic tire and a method for manufacturing it. The pneumatic tire 1 comprises a frame, consisting of a frame 10, in which the radially arranged strips of rubber are coated on the top and the road surface of the tire. The frame 10 includes a center member 11, which is wound around the road surface of the tire 2 in the radial direction of the tire, and the starting and ending ends in the radial direction of the tire are joined together with each other, and a longitudinal rectangle 12 is used on the opposite side of the center member 11. Each member uses a longitudinal rectangle 12, a longitudinal rectangle 12a formed by cutting the top of the tire with a longitudinal rubber sheet 13, and a longitudinal rectangle 12 is curved radially in such a way that the sidewall 3 is formed, in such a manner that the adjacent longitudinal rectangle 12a is specially bonded to each other. By forming the side portions 6S of the frame, it is the object of the invention to prepare a pneumatic tire and a method of manufacturing, the capability of which is the same reinforcement. The pneumatic tire 1 comprises a frame, using a frame 10, in which the radial strips of the frame are coated with rubber on the top and the road surface of the tire. The frame 10 includes a center portion 11 which is coiled around the road surface portion 2 in the radial direction of the tire and in which the starting and ending ends in the radial direction of the tire are joined to each other, and a longitudinal rectangle portion 12 is used on the side opposite to the center portion 11, in each of which a longitudinal rectangle 12 is used, a longitudinal rectangle 12a is formed by cutting the top of the tire by a longitudinal sheet 13, and a longitudinal rectangle portion 12 is curved radially in such a way that the adjacent longitudinal rectangle portion 12a is specially bonded on each other by forming the side portions 6S of the frame.

Claims (3)

Claims (all of which will not appear on the advertisement page): 1. A pneumatic tire (1) comprises a frame (6) extending from the tread portion (2) to the bead portion (4) on the opposite side through the sidewall portion (3) in sequence, and which employs a series of frame canvas plies (10) arranged radially, the chords of the frame being coated with rubber at the upper part (16), and a tread reinforcement layer (8) including a band ply (7) arranged inside the tread portion (2) and radially outside the frame (6), wherein the frame canvas ply (10) includes a center canvas ply (11) wrapped continuously around the tread portion (2) in the circumferential direction of the tire and wherein the starting ends (lla) and terminating ends (llb) in the circumferential direction of the tire are connected, and a long rectangular canvas ply section (12) located opposite the center canvas ply section (11), in each long rectangular canvas ply section (12). (12a) formed by cutting the rubber at the upper part around the extension (13) between the chords of the frame (15) from the side edge of the canvas ply of the frame (10) to the center canvas ply section (11) is arranged in a circumferential direction, characterized by each said rectangular canvas ply section (12) being bent along an internal radius following the shape of each sidewall section (3) such that adjacent long rectangular pieces (12a) are overlaid, thereby forming the side sections (6S) of the frame (6). 2. A pneumatic tire of claim 1, wherein the center canvas ply section (11) includes a continuous strand (17) extending from the starting end (11a) to the terminating end (11b) in a direction that intersects the chords of the frame (15) at right angles. 3. A pneumatic tire of any one of claims 1 and 2, wherein the length of the piece The long rectangle (12a) in the circumferential direction of the tire is 10 to 30 mm. 4. A pneumatic tire according to any one of claims 1 to 3, wherein the long rectangle (12a) includes a first long rectangle (12a) and a second long rectangular canvas piece (12a) alternately arranged in the circumferential direction of the tire, and the side portions (6S) of the frame (6) are formed by bending the first long rectangle (12a) along its inner radius before the second long rectangle (12a) and by gluing. A second elongated rectangular piece (12a) is mounted on the axially oriented outer face of the first elongated rectangular piece (12a) in every other piece. 5. A pneumatic tire of any one of claims 1 to 3, wherein the side portions (6S) of the frame (6) are formed by bending the elongated rectangular piece (12a) along its inner radius, each of which overlaps the axially oriented outer face of the previously bent adjacent elongated rectangular piece (12a). 6. A pneumatic tire of any one of claims 1 to 5, wherein each bead portion (4) includes a bead core (5) provided on at least one of its inner and outer faces. In the axial direction of the tire of each rectangular piece (12a), the bead core (5) is a non-expanding bead wire (5a) wound at least once around the circumference of the tire. 7. A method of manufacturing a pneumatic tire comprising a frame (6) extending from the tread member (2) to the bead member (4) on the opposite side through the cheek member (3) in sequence and employing a canvas layer of the frame (10) with radially arranged chord rows of the frame coated with rubber on the upper part (16), and a tread reinforcement layer (8) including a band layer (7) arranged inside the tread member (2) and outside the radially arranged frame (6), wherein the manufacturing method includes a frame forming process for forming a ring-shaped frame using a mold, the frame forming process includes a step of supplying it to the mold. The canvas ply of the frame (10) having a center canvas ply section (11) which is continuous with the rubber at the top part (16) in the circumferential direction of the tire, and the rectangular canvas ply sections (12), each including a rectangular canvas ply (12a) formed by cutting the rubber at the top part (16), whereby a joint (13) between the chords of the frame (15) from the side edge (10E) of the canvas ply of the frame (10) to the center canvas ply section (11) is arranged along the side of the center canvas ply section (11) in the circumferential direction of the tire, the procedure of wrapping the center canvas ply section (11) of the canvas ply of the frame (10) around the tread area on the outside of the mold in the circumferential direction of the tire, and of the overhang connecting the starting end (11a) and the terminating end (11b) of the center canvas ply section (11) in the circumferential direction of the tire, and the characteristics are as follows: The process of bending each long rectangular piece (12a) of the layer section, the long rectangular canvas (12) along the inner radius following the shape of the rubber cheek (3) section, while stacking the long rectangular piece (12a) next to each other, thus forming the side sections of the frame 8. A manufacturing method for a pneumatic tire comprising a frame (6) extending from the tread (2) to the bead (4) on the opposite side through the cheek (3) in sequence and employing a ply of frame fabric (10) such that the radial array of frame chords is coated with rubber on the upper part (16) and a tread reinforcement layer including a band (7) arranged inside the tread (2) and radially outside the frame (6), wherein the manufacturing method includes a frame forming process for forming a circular frame using a shaping mold. The frame forming process includes the step of supplying the ply of frame fabric (10) to the shaping mold, the step of forming a joint (13) in which the rubber is cut at the upper part (16) between the chords of frame (15) for a predetermined length from the opposite edge (10E) of the ply of frame fabric (10) arranged on the shaping mold. To this end, a center canvas section (11) is formed, which is continuous with the upper part (16) in the circumferential direction of the tire, and a long rectangular canvas section (12), each including a long rectangular piece (12a) formed around (13) and arranged along the side of the center canvas section (11) in the circumferential direction of the tire, the process of wrapping the center canvas section (11) of the frame canvas section (10) around in the circumferential direction of the tire, and of the overhang connecting the starting end (11a) and the ending end (11b) of the center canvas section (11) in the circumferential direction of the tire, and characterized by the process of bending each long rectangular piece (12a) of the long rectangular canvas section (12) along an inner radius following the shape of the rubber cheek section (3), each while stacking adjacent long rectangular pieces (12a) on top of each other. 9. A method of manufacturing a pneumatic tire according to any one of claims 7 to 8, wherein the mold has an outer face which approximates the inner face shape of the tire when a 5% internal pressure is applied. 1 0. A method of manufacturing a pneumatic tire according to any one of claims 7 to 9, wherein the mold has an outer face which is smaller than the inner face shape of the tire when a 5% internal pressure is applied. 1 1. A method of manufacturing an animatronic tire according to any one of claims 7 to 10, further including a process of forming a raw cover including a ring-shaped frame on the outside of the mold, shaping and vulcanizing, and a process of forming the vulcanizing and shaping, using a mold for vulcanizing, the raw cover after the mold is removed. 1 2. A method of manufacturing a pneumatic tire according to claim 11, wherein, in the vulcanizing and forming process, the raw cover is vulcanized such that the radial stretch is 0.1% to 2.0% by means of an expansion of the inner tube arranged on the side of the inner face of the raw cover 1. 3. A method of manufacturing a pneumatic tire according to any one of claims 11 to 12, wherein the vulcanizing and forming process of the raw cover is vulcanized, with the directional fibers compressed along the meridian to a level of 0.1% to 2.0% by the expansion of the inner tube arranged on the inside face of the raw cover.