Turn-up capsule capable of ensuring uniform stretching of sidewall

Abstract

The invention belongs to the technical field of tire forming, and particularly relates to a turn-up capsule capable of ensuring uniform stretching of a sidewall, the turn-up capsule sequentially comprises a first rubber sheet, a second rubber sheet, a first cord fabric, a first vulcanizing rubber sheet, a second cord fabric, a third rubber sheet, a second vulcanizing rubber sheet and a fourth rubber sheet from outside to inside; according to the capsule, material distribution of all parts of the capsule is adjusted, the purpose of changing the shape of the capsule after inflation is achieved, and therefore the purpose that under the condition that the design size of the tire side is not changed, the size of the capsule is changed, and the size of the capsule is changed is achieved. Materials at all parts of the tire side wall are uniformly stretched, and the stress balance of the shoulder part and the ring part of the tire is ensured, so that the service life of the tire is prolonged, and early damage of the tire is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of tire molding, and in particular relates to an inverted bladder for ensuring uniform stretching of a tire sidewall. Background Art

[0002] Tires are essential components for vehicles such as cars and trucks, and the performance of these vehicles is closely related to the characteristics of the tires.

[0003] The sidewall is located on the side of the tire, outside the carcass, and its main function is to protect the carcass and prevent corrosion and scratches. At the same time, because the sidewall is located in the main deformation area of ​​the tire, the rationality of the material distribution affects the position of the horizontal axis of the tire. If the horizontal axis is located upward, the tire shoulder is subjected to great force, and it is easy to have quality problems such as shoulder hollowing and cracking, causing early damage to the tire. On the contrary, if the horizontal axis is located downward, the tire rim is subjected to great force, and it is easy to have quality problems such as rim hollowing and cracking, which will also cause early damage to the tire. It is an important component for tire safety.

[0004] The molding process is the process of combining various semi-finished parts. According to the requirements of the construction table, the semi-finished parts are laminated layer by layer on the laminating drum and the belt drum according to the positioning of the light markers, and then combined and shaped on the molding drum and pressed into the shape of the tire blank. The sidewalls are pushed and pulled up by the inflation bladder (or mechanical finger-shaped pieces) and attached to the tire body.

[0005] The shape of the capsule after inflation is determined by the distribution of the materials in each part of the capsule. The shape of the capsule after inflation is the key to whether the sidewall is stretched evenly and whether the materials in each part of the sidewall are reasonably distributed. If the capsule is small, the capsule cannot touch the top of the sidewall after inflation, and the top of the sidewall is not stretched, which is prone to pleating and thicker thickness. If the capsule is large, the capsule and the sidewall cannot be evenly covered together after inflation, the capsule cannot support the sidewall, and the sidewall slides off the capsule. It cannot ensure that the sidewall is stretched evenly from the bottom of the tire bead, and pleating and air pockets are prone to occur at the bottom of the sidewall. At present, the design of the capsule only considers different sizes, and does not take into account the influence of different sidewall widths and thicknesses. For example, the sidewall widths of the 11R22.5 series and the 13R22.5 series differ by about 50mm. Obviously, the same capsule design cannot meet both specifications at the same time. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides an inverted bladder that ensures uniform stretching of the tire sidewall.

[0007] The present invention is achieved in this way.

[0008] An inverted bladder for ensuring uniform stretching of the sidewall, the bladder comprises, from outside to inside, a first film, a second film, a first cord, a first vulcanized film, a second cord, a third film, a second vulcanized film, and a fourth film; a fifth film, a sixth film, a seventh film, an eighth film, a first high-elastic fabric, and a second high-elastic fabric are sequentially attached to the outer side of the first film, wherein:

[0009] The width of the first film is 1470±10mm; the width of the second film is 340±10mm; the width of the first curtain cloth is 1420±10mm; the width of the first vulcanized film is 90±10mm, the width of the second curtain cloth is 1440±10mm, the width of the third film is 470±10mm, the width of the second vulcanized film is 90±10mm, the width of the fourth film is 1470±10mm, the width of the fifth film is 320±10mm, the width of the sixth film is 310±10mm, the width of the seventh film is 310±10mm, the width of the eighth film is 470±10mm, the width of the first high-elastic cloth is 130±10mm and the width of the second high-elastic cloth is 70±10mm.

[0010] Further, the left end of the first film is 0-20mm away from the leftmost end point of the capsule; the left end of the second film is 510±10mm away from the leftmost end point of the capsule; the left end of the first curtain is 0-20mm away from the leftmost end point of the capsule; the left end of the first vulcanized film is 530±10mm away from the leftmost end point of the capsule, the left end of the second curtain is 0-20mm away from the leftmost end point of the capsule, the left end of the third film is 490±10mm away from the leftmost end point of the capsule, the left end of the second vulcanized film is 550±10mm away from the leftmost end point of the capsule, and the left end of the third film is 490±10mm away from the leftmost end point of the capsule. The left end of the fourth film is 0-20mm away from the leftmost end point of the capsule, the right end of the fifth film is 60±10mm away from the inverted part of the capsule, the right end of the sixth film is 70±10mm away from the inverted part of the capsule, the right end of the seventh film is 80±10mm away from the inverted part of the capsule, the right end of the eighth film is 380±10mm away from the inverted part of the capsule, the right end of the first high-elastic cloth is 0-20mm away from the inverted part of the capsule, and the left end of the second high-elastic cloth is 330±10mm away from the leftmost end point of the capsule.

[0011] Further, the thickness of the first film is 1.2±0.2mm; the thickness of the second film is 1.0±0.2mm; the thickness of the first curtain is 1.2±0.2mm; the thickness of the first vulcanized film is 1,0±0.2mm, the thickness of the second curtain is 1.2±0.2mm, the thickness of the third film is 1.0±0.2mm, the thickness of the second vulcanized film is 1.0±0.2mm, the thickness of the fourth film is 1.2±0.2mm, the thickness of the fifth film is 1.0±0.2mm, the thickness of the sixth film is 1.5±0.2mm, the thickness of the seventh film is 1.5±0.2mm, the thickness of the eighth film is 1.0±0.2mm, the thickness of the first high-elastic cloth is 1.0±0.2mm, and the thickness of the second high-elastic cloth is 1.0±0.2mm.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] The capsule of the present invention adjusts the material distribution of various parts of the capsule to achieve the purpose of changing the shape of the capsule after inflation, thereby ensuring uniform stretching of materials in various parts of the sidewall while keeping the design size of the sidewall unchanged, ensuring balanced stress on the shoulder and rim of the tire, thereby increasing the service life of the tire and avoiding early damage to the tire. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic diagram of the structure of a capsule provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0016] See also Figure 1 As shown, a reversed capsule for ensuring uniform stretching of the sidewall, the width between the leftmost end point A and the reversed part B of the capsule is 800±50mm, and the capsule includes from the outside to the inside: a first film 1, a second film 2, a first cord 3, a first vulcanized film 4, a second cord 5, a third film 6, a second vulcanized film 7, and a fourth film 8; the outer side of the first film 1, a fifth film 9, a sixth film 10, a seventh film 11, an eighth film 12, a first high-elastic fabric 13, and a second high-elastic fabric 14 are sequentially attached to the width between 670±30mm from the reversed part, wherein:

[0017] The width of the first film 1 is 1470±10mm; the width of the second film 2 is 340±10mm; the width of the first curtain 3 is 1420±10mm; the width of the first vulcanized film 4 is 90±10mm, the width of the second curtain 5 is 1440±10mm, the width of the third film 6 is 470±10mm, the width of the second vulcanized film 7 is 90±10mm, the width of the fourth film 8 is 1470±10mm, the width of the fifth film 9 is 320±10mm, the width of the sixth film 10 is 310±10mm, the width of the seventh film 11 is 310±10mm, the width of the eighth film 12 is 470±10mm, the width of the first high-elastic cloth 13 is 130±10mm and the width of the second high-elastic cloth 14 is 70±10mm.

[0018] Further, the left end of the first film is 0-20mm away from the leftmost end point of the capsule; the left end of the second film is 510±10mm away from the leftmost end point of the capsule; the left end of the first curtain is 0-20mm away from the leftmost end point of the capsule; the left end of the first vulcanized film is 530±10mm away from the leftmost end point of the capsule, the left end of the second curtain is 0-20mm away from the leftmost end point of the capsule, the left end of the third film is 490±10mm away from the leftmost end point of the capsule, the left end of the second vulcanized film is 550±10mm away from the leftmost end point of the capsule, and the left end of the third film is 490±10mm away from the leftmost end point of the capsule. The left end of the fourth film is 0-20mm away from the leftmost end point of the capsule, the right end of the fifth film is 60±10mm away from the inverted part of the capsule, the right end of the sixth film is 70±10mm away from the inverted part of the capsule, the right end of the seventh film is 80±10mm away from the inverted part of the capsule, the right end of the eighth film is 380±10mm away from the inverted part of the capsule, the right end of the first high-elastic cloth is 0-20mm away from the inverted part of the capsule, and the left end of the second high-elastic cloth is 330±10mm away from the leftmost end point of the capsule.

[0019] Further, the thickness of the first film is 1.2±0.2mm; the thickness of the second film is 1.0±0.2mm; the thickness of the first curtain is 1.2±0.2mm; the thickness of the first vulcanized film is 1.0±0.2mm, the thickness of the second curtain is 1.2±0.2mm, the thickness of the third film is 1.0±0.2mm, the thickness of the second vulcanized film is 1.0±0.2mm, the thickness of the fourth film is 1.2±0.2mm, the thickness of the fifth film is 1.0±0.2mm, the thickness of the sixth film is 1.5±0.2mm, the thickness of the seventh film is 1.5±0.2mm, the thickness of the eighth film is 1.0±0.2mm, the thickness of the first high-elastic cloth is 1.0±0.2mm, and the thickness of the second high-elastic cloth is 1.0±0.2mm.

[0020] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A reversed bladder for ensuring uniform stretching of the sidewall, characterized in that: The capsule includes, from outside to inside, a first film, a second film, a first curtain fabric, a first vulcanized film, a second curtain fabric, a third film, a second vulcanized film, and a fourth film; a fifth film, a sixth film, a seventh film, an eighth film, a first high-elastic fabric, and a second high-elastic fabric are attached to the outside of the first film in sequence, wherein: The width of the first film is 1470±10mm; the width of the second film is 340±10mm; the width of the first curtain cloth is 1420±10mm; the width of the first vulcanized film is 90±10mm, the width of the second curtain cloth is 1440±10mm, the width of the third film is 470±10mm, the width of the second vulcanized film is 90±10mm, the width of the fourth film is 1470±10mm, the width of the fifth film is 320±10mm, the width of the sixth film is 310±10mm, the width of the seventh film is 310±10mm, the width of the eighth film is 470±10mm, the width of the first high-elastic cloth is 130±10mm and the width of the second high-elastic cloth is 70±10mm.

2. The reversed bladder for ensuring uniform stretching of the sidewall according to claim 1, characterized in that: The left end of the first film is 0-20mm away from the leftmost end point of the capsule; the left end of the second film is 510±10mm away from the leftmost end point of the capsule; the left end of the first curtain is 0-20mm away from the leftmost end point of the capsule; the left end of the first vulcanized film is 530±10mm away from the leftmost end point of the capsule, the left end of the second curtain is 0-20mm away from the leftmost end point of the capsule, the left end of the third film is 490±10mm away from the leftmost end point of the capsule, the left end of the second vulcanized film is 550±10mm away from the leftmost end point of the capsule, and the fourth film is The left end of the film is 0-20mm away from the leftmost end of the capsule, the right end of the fifth film is 60±10mm away from the reversed part of the capsule, the right end of the sixth film is 70±10mm away from the reversed part of the capsule, the right end of the seventh film is 80±10mm away from the reversed part of the capsule, the right end of the eighth film is 380±10mm away from the reversed part of the capsule, the right end of the first high-elastic cloth is 0-20mm away from the reversed part of the capsule, and the left end of the second high-elastic cloth is 330±10mm away from the leftmost end of the capsule.

3. The reversed bladder for ensuring uniform stretching of the sidewall according to claim 1 or 2, characterized in that: The thickness of the first film is 1.2±0.2mm; the thickness of the second film is 1.0±0.2mm; the thickness of the first curtain is 1.2±0.2mm; the thickness of the first vulcanized film is 1,0±0.2mm, the thickness of the second curtain is 1.2±0.2mm, the thickness of the third film is 1.0±0.2mm, the thickness of the second vulcanized film is 1.0±0.2mm, the thickness of the fourth film is 1.2±0.2mm, the thickness of the fifth film is 1.0±0.2mm, the thickness of the sixth film is 1.5±0.2mm, the thickness of the seventh film is 1.5±0.2mm, the thickness of the eighth film is 1.0±0.2mm, the thickness of the first high-elastic cloth is 1.0±0.2mm, and the thickness of the second high-elastic cloth is 1.0±0.2mm.

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