Engineering tire forming turn-up capsule

Abstract

The utility model discloses an engineering tire building turn-up capsule which comprises a head chuck and a tail chuck, a head bayonet is arranged at the end of the head chuck, a tail bayonet is arranged at the end of the tail chuck, the head bayonet and the tail bayonet are connected with a capsule body, and a telescopic capsule opening is arranged at one end, close to the head bayonet, of the capsule body. A seam allowance is formed in the other end of the telescopic capsule opening, a capsule body is arranged on the other side of the seam allowance, the telescopic capsule opening comprises an acute-angle bent part and a first arc-shaped bent part, the first arc-shaped bent part is arranged between the acute-angle bent part and the seam allowance, and the telescopic capsule opening can effectively guarantee that the formed reverse wrapping capsule can play a role in sufficient buffering after being stretched for a long time. The problem that in the long-time forming process, the formed turn-up capsule is clamped and cracked by the forming drum fan-shaped blocks is effectively solved, the service life of the formed turn-up capsule is prolonged, the capsule body has excellent stretching and sucking performance, and the formed turn-up capsule can provide enough expansion to guarantee rapid turn-up of the tire side part during inflation.

Description

Technical Field

[0001] The utility model relates to the technical field of tire molding, in particular to an engineering tire molding reverse-wrapped capsule. Background Art

[0002] Molding is a process in the tire production process. The tire molding drum is a crucial tool in the tire molding process, and the molding turn-up capsule is a major auxiliary material in the molding process. The quality of the turn-up capsule directly affects the molding quality of the tire. In the prior art, a forming turn-up capsule is usually installed on a forming drum. When the fan-shaped block of the forming drum expands, the capsule is driven to expand together to cooperate in realizing tire forming. The turn-up capsule relies on the elastic properties of its own rubber and elastic fiber to achieve expansion and stretching. For example, patent CN217803470U discloses a load-bearing radial tire forming turn-up capsule, which discloses that a capsule body is sequentially provided with an inner rubber layer, a skeleton layer, an outer rubber layer and an anti-sticking layer from the inside to the outside, and the skeleton layer is made of a weft cord fabric made of a polyester material. However, conventional turn-up capsules rely on the elastic properties of their own rubber and elastic fiber to achieve expansion and stretching. The reciprocating expansion and contraction of the turn-up capsule has high requirements on the service life of the turn-up capsule. Moreover, since the diameter of engineering tires is larger than that of ordinary tires, as the number of expansion and contraction of the turn-up capsule increases, the rubber and elastic fiber of the turn-up capsule itself may experience fatigue aging, thereby causing problems such as breakage of the elastic fiber and cracking of the capsule, which is not conducive to further improving the service life of the capsule. Utility Model Content

[0003] The purpose of the utility model is to overcome the above-mentioned defects or problems existing in the background technology and provide an engineering tire molding reverse bag capsule.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A reversed capsule for forming an engineering tire comprises a head chuck and a tail chuck, wherein the outer end of the head chuck is provided with a head snap-in, the outer end of the tail chuck is provided with a tail snap-in, a capsule body is installed with the head snap-in and the tail snap-in, a telescopic bag opening is provided at one end of the capsule body close to the head snap-in, a sub-opening is provided at the other end of the telescopic bag opening, a capsule body is provided on the other side of the sub-opening, the telescopic bag opening comprises an acute-angle bending portion and a first arc-shaped bending portion, and the first arc-shaped bending portion is provided between the acute-angle bending portion and the sub-opening.

[0006] In certain embodiments of the present invention, a second arc-shaped bending portion is provided between the capsule body and the tail clip.

[0007] In certain embodiments of the utility model, the sub-opening is arranged obliquely, the capsule body is arranged horizontally, and the sub-opening is inclined outwardly relative to the capsule body.

[0008] In certain embodiments of the present invention, the tail bayonet is located below the sub-mouth.

[0009] In some embodiments of the utility model, the capsule body is made of rubber, and a fiber skeleton is embedded in the capsule body.

[0010] In some embodiments of the present invention, the sub-port is provided with an anti-sticking layer.

[0011] In certain embodiments of the present invention, a knurled pattern layer is provided on the capsule.

[0012] In certain embodiments of the present invention, the head chuck and the tail chuck are sequentially mounted on the side drum of the forming drum.

[0013] From the above description of the utility model, it can be seen that compared with the prior art, the utility model has the following beneficial effects:

[0014] 1. The engineering tire molding reverse capsule has a simple structure, convenient installation and long service life. The capsule body has excellent stretching, extension and suction performance. The molding reverse capsule can provide sufficient expansion diameter when inflated to ensure the rapid reverse packaging of the engineering tire sidewall components, which helps to assist the tire in completing molding and effectively reduce the early damage of the capsule caused by rubber fatigue and clamping rupture.

[0015] 2. The telescopic bladder mouth can effectively ensure that the molding capsule can provide sufficient cushioning under long-term extension, effectively reduce the twitching of component materials during the molding process of engineering tires, help extend the service life of the molding capsule, and effectively reduce the problem of molding capsule cracking caused by long-term molding process.

[0016] 3. A knurled pattern layer is provided on the bladder body, so that the sidewall of the tire can have sufficient friction with the bladder when it is turned up, ensuring that the sidewall can be stretched and extended accordingly; an anti-sticking layer is provided at the sub-mouth to effectively avoid the situation in which the tire bead is stuck for a long time by the forming drum during the tire forming process, causing difficulty in unloading the tire and damage to the forming turn-up bladder and the tire embryo. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 It is a schematic diagram of the capsule body of the utility model;

[0019] Figure 2 For the utility model Figure 1 A magnified view of;

[0020] Figure 3 It is a structural schematic diagram of the utility model;

[0021] Description of main reference numerals:

[0022] 1. Head chuck, 10. Head snap-on, 2. Tail chuck, 20. Tail snap-on, 3. Main shaft, 30. Side drum, 31. Fan-shaped block, 4. Capsule body, 40. Sharp-angle bending portion, 41. First arc-shaped bending portion, 42. Sub-mouth, 43. Capsule body, 44. Second arc-shaped bending portion. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are preferred embodiments of the utility model and should not be regarded as excluding other embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0024] In the claims, specification and the above-mentioned drawings of the utility model, unless otherwise clearly defined, the use of terms such as "first", "second" or "third" etc. is to distinguish different objects rather than to describe a specific order.

[0025] In the claims, specification and the above-mentioned drawings of the utility model, unless otherwise explicitly defined, directional words, such as the terms "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inside", "outside", "up", "down", "front", "back", "left", "right", "clockwise", "counterclockwise", etc., indicating directions or positional relationships are based on the directions and positional relationships shown in the drawings, and are only for the convenience of describing the invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the specific protection scope of the invention.

[0026] In the claims, specification and the above drawings of the utility model, unless otherwise clearly defined, if the term "fixed connection" or "fixed connection" is used, it should be understood in a broad sense, that is, any connection method without a displacement relationship and relative rotation relationship between the two, that is to say, including non-detachable fixed connection, detachable fixed connection, integrated connection and fixed connection through other devices or elements.

[0027] In the claims, specification and drawings of the present utility model, if the terms "include", "have" and their variations are used, they are intended to mean "including but not limited to".

[0028] See also Figure 1-3 :

[0029] A reverse-wrapped capsule for forming an engineering tire comprises a head chuck 1 and a tail chuck 2, wherein the head chuck 1 and the tail chuck 2 are sequentially mounted on a side drum 30 of a forming drum, a plurality of head snap-ons 10 are arranged at the outer end of the head chuck 1, and a plurality of tail snap-ons 20 are arranged at the outer end of the tail chuck 2, the head snap-ons 10 and the tail snap-ons 20 are connected with a capsule body 4, the head snap-ons 10 and the tail snap-ons 20 are used to ensure a tight fit between the capsule body 4 and the forming drum, and to ensure that the capsule body 4 will not fall off during the production process; the forming drum is a common forming drum in the prior art, and the forming drum comprises a main shaft 3, a side drum 30 and a fan-shaped block 31, wherein the side drum 30 is mounted on the main shaft 3, and the fan-shaped block 31 is mounted on the side drum 30, and when working, the expansion of the fan-shaped block 31 drives the reverse-wrapped capsule to expand.

[0030] As an embodiment, the capsule body 4 is made of natural rubber, and a fiber skeleton is embedded in the capsule body 4, so that the capsule body 4 has excellent stretching and extensibility. The molded inverted capsule can provide a sufficient expansion diameter when inflated to ensure the rapid inverting of the tire sidewall components. It can be understood that the fiber skeleton is made of elastic fiber.

[0031] As an embodiment, the tail chuck 2 has the same structure as the head chuck 1; in some other embodiments, the tail chuck 2 includes a mounting plate, a mounting ring is provided at the end of the mounting plate along the circumferential direction, and the tail bayonet 20 is provided on the outside of the mounting ring and away from one end of the mounting plate.

[0032] The capsule body 4 is provided with a telescopic bag opening at one end close to the head bayonet 10, and a sub-opening 42 is provided at the other end of the telescopic bag opening. The telescopic bag opening includes an acute angle bending portion 40 and a first arcuate bending portion 41, and the first arcuate bending portion 41 is provided between the acute angle bending portion 40 and the sub-opening 42. A capsule body 43 is provided on the other side of the sub-opening 42, and a second arcuate bending portion 44 is provided between the capsule body 43 and the tail bayonet 20. The telescopic bag opening can effectively ensure that the formed reversed capsule can play a sufficient buffer under long-term stretching, effectively reduce the situation of the formed reversed capsule being stuck and cracked during the long-term molding process, and is conducive to extending the service life of the formed reversed capsule.

[0033] In one embodiment, a molding turn-up capsule is used in a molding process of an R25 engineering tire. When the molding turn-up capsule is expanded, the distance between the inner expanded sector block 31 and the axis center of the main shaft 3 increases by about 20% compared to the sector block 31 in the contracted static state. The expansion length of the telescopic bag opening is set to 15% to 18% of the distance between the sector block 31 and the axis center of the main shaft 3 of the molding drum in the contracted static state. Therefore, when the capsule body 4 is expanded, the telescopic bag opening is expanded, thereby delaying the fatigue performance of the rubber and elastic fiber of the capsule body 4 and increasing the service life of the turn-up capsule.

[0034] In some embodiments, the sub-mouth 42 is tilted, the tail bayonet 20 is located below the sub-mouth 42, the bladder body 43 is horizontally arranged, the sub-mouth 42 is tilted outward relative to the bladder body 43, and the tilt angle range is 2-10°. Preferably, the tilt angle is 4.5°; further, the sub-mouth 42 is provided with an anti-sticking layer, and the bladder body 43 is provided with a knurled pattern layer. The sub-mouth 42 provided with the anti-sticking layer is used to effectively avoid the situation in which the tire bead is stuck by the forming drum for a long time during the tire forming process, causing difficulty in unloading the tire, damaging the forming turn-up capsule and the tire embryo, and the bladder body 43 provided with the knurled pattern layer can make the sidewall of the tire have sufficient friction with the capsule when it is turned up, ensuring that the sidewall can be stretched and extended accordingly, thereby ensuring that the sidewall can be turned up to the shoulder position of the tire.

[0035] The description of the above specification and embodiments is used to explain the protection scope of the utility model, but does not constitute a limitation on the protection scope of the utility model. Through the enlightenment of the utility model or the above embodiments, ordinary technicians in this field can obtain modifications, equivalent replacements or other improvements to the embodiments of the utility model or part of the technical features thereof through logical analysis, reasoning or limited experiments, which should be included in the protection scope of the utility model.

Claims

1. An engineering tire molding reverse bag, characterized in that: It includes a head chuck and a tail chuck, the outer end of the head chuck is provided with a head snap-in, the outer end of the tail chuck is provided with a tail snap-in, the head snap-in and the tail snap-in are installed with a capsule body, one end of the capsule body close to the head snap-in is provided with a telescopic bag opening, the other end of the telescopic bag opening is provided with a sub-opening, and the other side of the sub-opening is provided with a capsule body, the telescopic bag opening includes an acute-angle bending portion and a first arc-shaped bending portion, and the first arc-shaped bending portion is provided between the acute-angle bending portion and the sub-opening.

2. The engineering tire molding reverse bag according to claim 1, characterized in that: A second arc-shaped bending portion is arranged between the capsule body and the tail clip.

3. The engineering tire molding reverse bag according to claim 2, characterized in that: The sub-opening is arranged obliquely, the capsule body is arranged horizontally, and the sub-opening is inclined outwardly relative to the capsule body.

4. The engineering tire molding reverse bag according to claim 2, characterized in that: The tail bayonet is located below the sub-mouth.

5. The engineering tire molding reverse bag according to claim 1, characterized in that: The capsule body is made of rubber, and a fiber skeleton is embedded in the capsule body.

6. The engineering tire molding reverse bag according to claim 1, characterized in that: The sub-port is provided with an anti-sticking layer.

7. The engineering tire molding reverse bag according to claim 1, characterized in that: The capsule body is provided with a knurled pattern layer.

8. The engineering tire molding reverse bag according to claim 1, characterized in that: The head chuck and the tail chuck are sequentially mounted on the side drums of the forming drum.

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