CN211416378U

CN211416378U - Tire curing bladder

Info

Publication number: CN211416378U
Application number: CN201922354087.3U
Authority: CN
Inventors: 赵会岩; 刘海军; 赵海林; 张学永; 刘涛
Original assignee: Yongyi Rubber Co ltd
Current assignee: Yongyi Rubber Co ltd
Priority date: 2019-12-23
Filing date: 2019-12-23
Publication date: 2020-09-04
Anticipated expiration: 2029-12-23

Abstract

The utility model discloses a tire vulcanization capsule relates to tire vulcanization capsule technical field. Comprises a middle body, capsule shoulder parts, capsule side parts, capsule neck parts and clamping edge parts which are sequentially and symmetrically distributed on two sides of the middle body; the outer wall of the neck of the capsule is outwards protruded to form a first protrusion and a second protrusion, a concave part between the first protrusion and the second protrusion is called a first groove, and a concave part between the second protrusion and the edge clamping part is called a second groove; the clamping edge part is provided with a front contraction end, an expansion part and a cone part. When the tire vulcanizing machine is used, the sealing ring is arranged in the groove, so that the strength of the tire vulcanizing bladder at the neck part and the edge clamping part of the bladder is improved, the contact area between the tire vulcanizing bladder and the tire vulcanizing machine is increased, the assembling stability and the sealing property of the tire vulcanizing bladder and the tire vulcanizing machine can be improved, and the failure rate caused by the damage of the tire vulcanizing bladder at the assembling part of the tire vulcanizing machine in use is further reduced.

Description

Tire curing bladder

Technical Field

The utility model relates to a tire vulcanization capsule technical field, in particular to tire vulcanization capsule.

Background

The tire vulcanization capsule is a hollow thin-wall rubber product, and is installed inside a tire vulcanizer to be used as an inner mold for tire shaping in the tire vulcanization molding process. The tire vulcanization capsule comprises a middle body playing a main expansion role, and capsule shoulder parts, capsule side parts, a capsule neck part and a clamping edge part which are sequentially and symmetrically distributed on two sides of the middle body; wherein the bladder neck and the clamping edge are matched with the tire vulcanizer. Media such as superheated water or compressed air are filled into the tire curing bladder, so that the tire curing bladder stretches to support the tire rubber blank, the tire rubber blank is attached to the tire inner liner, the temperature is kept relatively balanced in the tire curing process by utilizing the flowing heat transfer characteristic of the media fluid in the tire curing bladder, the effect of uniform tire curing is achieved, and the balance performance of the tire is improved.

The tire curing bladder is a product which can be repeatedly used for many times, the number of times of repeated use is closely related to the material and the structure of the tire curing bladder, and the tire curing bladder is also influenced by a tire curing machine assembled with the tire curing bladder and tire curing process parameters during use. In continuous research and practice, the structural size of the tire curing bladder is designed according to the structural size of the tire to be cured and molded according to a certain proportion, and one-to-one corresponding production application between the tire curing bladder and the tire is basically realized. Recent production practices have found that tire curing bladders that fail due to failure occurring at the point of assembly with a tire curing press account for up to 30%. To solve this problem, we propose the present invention.

Chinese patent CN101462329B discloses an expandable bladder for shaping a pneumatic tire to be installed in a tire curing press, which is improved mainly on the intermediate body of the tire curing bladder to more closely match the green tire geometry and prevent deformation of the cured tire; the improvement on the neck part and the clamping edge part of the tire curing bladder at the assembling position of the tire curing bladder and the tire curing machine is not made, and the technical scheme for solving the problem of the damage of the tire curing bladder at the assembling position of the tire curing machine is not provided.

SUMMERY OF THE UTILITY MODEL

The utility model provides a tire vulcanization capsule improves the structure of tire vulcanization capsule, combines the preparation method of tire vulcanization capsule, solves above-mentioned technical problem.

The specific technical scheme is that the tire curing bladder comprises a middle body playing a main expansion role, and bladder shoulder parts, bladder side parts, a bladder neck part and a clamping edge part which are sequentially and symmetrically distributed on two sides of the middle body; a first bulge is formed on the outer wall of the capsule neck part close to the side part of the capsule in an outward protruding mode, a second bulge is formed on the outer wall of the capsule neck part close to the clamping edge part in an outward protruding mode, the concave part between the first bulge and the second bulge is called a first groove, and the concave part between the second bulge and the clamping edge part is called a second groove;

the end part of the clamping edge part close to the central line of the middle body forms a tapered front-shrinking end which gradually shrinks from a position far away from the central line of the middle body to a position close to the central line of the middle body; the clamping edge part is outwards protruded at each position of the outer side perpendicular to the central line of the middle body to form a conical expanding part which gradually shrinks from inside to outside; a tapered cone part gradually enlarging from the second groove to the clamping edge part is formed at the joint of the second groove and the clamping edge part.

Further, the cross sections of the first protrusion and the second protrusion are arc-shaped. First arch and second are protruding to be set up along the capsule neck, have first recess between the two, when assembling with the tire vulcanizer, the annular seal ring can be placed to first recess inside, and the tire vulcanizer can be protruding to form certain fastening force to first arch and second to reach good fixed and sealed effect. When the arc-shaped first protrusion and the arc-shaped second protrusion are stressed, the deformation bearing capacity is high, and no glue is arranged on the edge part to provide a deformation space at the highest protruding part.

Further, the height of the second protrusion is larger than or equal to that of the first protrusion.

Further, the height of the first protrusions is 10% -50% of the thickness of the neck of the capsule, and the height of the second protrusions is 10% -80% of the thickness of the neck of the capsule.

Further, the width of the front end is 10% -50% of the width of the edge clamping part.

It should be noted that the height of the first protrusion is the distance between the highest point of the first protrusion and the outer wall of the neck of the capsule; the height of the second bulge is the distance between the highest point of the second bulge and the outer wall of the neck of the capsule; the width of the front shrinkage end is the distance between the left surface and the right surface of the conical body of the front shrinkage end in the direction vertical to the central line of the middle body; the width of the clamping edge part refers to the distance between the left and right surfaces of the clamping edge part in the direction perpendicular to the central line of the middle body.

The damage to the tire curing bladder assembled with the tire curing machine is caused by mechanical damage, flex damage, poor sealing, premature aging damage and the like, and is related to unstable assembly, poor sealing and material quality. In the utility model, the capsule neck and the clamping edge are structurally improved, the clamping edge is thickened by the whole design expanding part, the contact area between the clamping edge and the assembly of the tire vulcanizer is increased, and the stability of matching is improved; the front end of the clamping edge part is designed with a tapered front contraction end, so that a space is provided for the deformation of the clamping edge part when the tire vulcanizing machine compresses, and the taper part enhances the combination between the clamping edge part and the neck part of the bladder. When the tire is vulcanized and the neck of the bladder is in contact with a tire vulcanizing machine, the first groove and the second groove are cavities, and the annular sealing ring is assembled at the positions of the first groove and the second groove during installation, so that a sealing effect can be achieved; when the mold is closed and pressed, the arc-shaped first protrusion and the arc-shaped second protrusion are stressed, the deformation bearing capacity is high, no glue is arranged on the edge parts, a deformation space at the highest protruding part is provided, and the integrity of the tire curing bladder is guaranteed. In addition, the design enlarges the sizes of the neck part and the clamping edge part of the bladder, improves the strength of the tire curing bladder at the neck part and the clamping edge part of the bladder, and also increases the contact area between the tire curing bladder and the tire curing machine.

Compared with the prior art, the beneficial effects of the utility model provide a, make the improvement to the capsule neck and the contained edge portion of tire curing bladder and tire vulcanizer assembly department, set up arch and recess at the capsule neck, install the sealing washer in the recess during use, contained edge portion sets up preceding tip of contracting, expand portion and pyramis, the intensity of tire curing bladder at capsule neck and contained edge portion has been improved, the area of contact between tire curing bladder and tire vulcanizer has also been increased, can improve the steadiness and the leakproofness of tire curing bladder and tire vulcanizer assembly, and then reduce the failure rate that leads to because of arousing tire curing bladder to destroy with tire vulcanizer assembly department during the use.

Drawings

FIG. 1 is a schematic cross-sectional structural view of a prior art tire curing bladder;

fig. 2 is a schematic sectional structure view of the tire curing bladder of the present invention.

1. The capsule comprises a middle body, 2 capsule shoulders, 3 capsule side parts, 4 capsule neck parts, 5 capsule clamping edge parts;

11. upper neck portion, 12, lower neck portion, 13, first protrusion, 14, second protrusion, 15, first groove, 16, second groove, 17, upper clamping edge, 18, lower clamping edge, 19, front end, 20, flared portion, 21, tapered portion.

Detailed Description

The following description of the embodiments of the present invention will be made with reference to the accompanying drawings and examples:

it should be noted that the structure, ratio, size and the like shown in the drawings of the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions, modification of any structure, ratio relationship, change or size adjustment, without affecting the function and the achievable purpose of the present invention, all should fall within the scope covered by the technical content disclosed in the present invention.

Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be made without substantial technical changes, and the present invention is also regarded as the scope of the present invention.

Referring to fig. 1-2, a tire curing bladder comprises a middle body 1 playing a main expansion role, a bladder shoulder 2, a bladder side 3, a bladder neck 4 and a clamping edge 5, wherein the bladder shoulder 2, the bladder side 3, the bladder neck 4 and the clamping edge 5 are sequentially and symmetrically distributed on two sides of the middle body 1;

a first protrusion 13 is formed to protrude outward on the outer wall of the capsule neck 4 near the capsule side 3, a second protrusion 14 is formed to protrude outward on the outer wall of the capsule neck 4 near the clamping edge 5, the depression between the first protrusion 13 and the second protrusion 14 is called a first groove 15, and the depression between the second protrusion 14 and the clamping edge 5 is called a second groove 16; the first projection 13, the second projection 14, the first recess 15 and the second recess 16 are all annular along the capsule neck 4; the capsule neck 4 comprises an upper neck 11 and a lower neck 12, the description being made with the upper neck 11, both being structurally symmetrical.

The end of the clamping edge part 5 close to the central line of the middle body 1 forms a tapered front contraction end 19 which gradually contracts from a position far away from the central line of the middle body 1 to a position close to the central line of the middle body 1; the clamping edge part 5 is outwards protruded at each position of the outer side perpendicular to the central line of the middle body 1 to form a tapered expanding part 20 which gradually shrinks from inside to outside; a tapered portion 21 which gradually expands from the second groove 16 to the clip edge portion 5 is formed at the joint of the second groove 16 and the clip edge portion 5; the clamping edge portion 5 comprises an upper clamping edge 17 and a lower clamping edge 18, which are depicted as being made with the upper clamping edge 17, which are structurally symmetrical.

The first protrusion 13 and the second protrusion 14 have an arc-shaped cross section. First arch 13 and second arch 14 set up along capsule neck 4, have first recess 15 between the two, when assembling with the tire vulcanizer, the annular seal ring will be placed to first recess 15 inside, and the tire vulcanizer can form certain fastening force to first arch 13 and second arch 14 to reach good fixed and sealed effect. When the arc-shaped first bulge 13 and the arc-shaped second bulge 14 are stressed, the capacity of bearing deformation is strong, and no glue is arranged on the edge part to provide a deformation space at the highest bulge part. The height of the second protrusions 14 is greater than or equal to the height of the first protrusions 13. The height of the first protrusions 13 is 10% -50% of the thickness of the capsule neck 4, and the height of the second protrusions 14 is 10% -80% of the thickness of the capsule neck 4.

The width of the leading end 19 is 10% to 50% of the width of the clamping lip 5.

A preparation method of a tire curing bladder is provided, which comprises the steps of preparing the tire curing bladder; in the tire curing bladder raw material, 60-80 parts of butyl rubber, 20-40 parts of chlorinated butyl rubber, 20-30 parts of common carbon black, 20-30 parts of acetylene carbon black, 5-10 parts of aluminum oxide, 3-5 parts of zinc oxide master colloidal particles, 1-2 parts of stearic acid, 1-3 parts of paraffin, 2-4 parts of vulcanized resin and 1-3 parts of sulfur;

ordinary carbon black refers to reinforcing carbon black commonly used for rubber, such as N330, N550.

The method comprises the following steps:

s1, weighing the materials according to the formula in parts by weight;

s2, rubber sheets are processed through rubber mixing;

s3, injection vulcanization: placing the film obtained in the step S24 into an injection vulcanizing machine, controlling the temperature of a screw at 70-90 ℃ and controlling the pressure at 16-18 MPa; the injection vulcanization temperature is 180 ℃ and 200 ℃, and the vulcanization time is 30-42 min; and after vulcanization, the injection vulcanizing machine ejects the tire bladder out of the mold cavity, and the high-strength tire vulcanizing bladder is prepared.

With above-mentioned preparation method, adopt the utility model discloses in the tire vulcanization capsule that the structure after the improvement produced, the tire vulcanization capsule that loses efficacy because of destroying at the assembly department with tire vulcanizer during the use accounts for and reduces to 3%.

Many other changes and modifications can be made without departing from the spirit and scope of the invention. It is to be understood that the invention is not to be limited to the specific embodiments, and that the scope of the invention is defined by the appended claims.

Claims

1. A tire curing bladder comprises a middle body (1) playing a main expansion role, bladder shoulder parts (2), bladder side parts (3), a bladder neck part (4) and a clamping edge part (5), wherein the bladder shoulder parts (2), the bladder side parts (3), the bladder neck part (4) and the clamping edge part are sequentially and symmetrically distributed on two sides of the middle body (1); it is characterized in that the preparation method is characterized in that,

a first bulge (13) is formed on the outer wall of the capsule neck part (4) close to the capsule side part (3) in an outward protruding way, a second bulge (14) is formed on the outer wall of the capsule neck part (4) close to the clamping edge part (5) in an outward protruding way, the sunken part between the first bulge (13) and the second bulge (14) is called a first groove (15), and the sunken part between the second bulge (14) and the clamping edge part (5) is called a second groove (16);

the end part of the clamping edge part (5) close to the central line of the middle body (1) is provided with a tapered front contraction end (19) which gradually contracts from a position far away from the central line of the middle body (1) to a position close to the central line of the middle body (1); the clamping edge part (5) is outwards protruded at each position of the outer side perpendicular to the central line of the middle body (1) to form a conical expanding part (20) which gradually shrinks from inside to outside; a tapered portion (21) which gradually expands from the second groove (16) to the grip edge portion (5) is formed at the contact portion between the second groove (16) and the grip edge portion (5).

2. A tyre vulcanisation capsule according to claim 1, wherein the first (13) and second (14) bulges are arcuate in cross-section.

3. A tyre curing bladder as claimed in claim 1, wherein the height of the second protrusions (14) is greater than or equal to the height of the first protrusions (13).

4. A tyre curing bladder according to claim 1, wherein the height of the first protrusions (13) is 10-50% of the thickness of the bladder neck (4) and the height of the second protrusions (14) is 10-80% of the thickness of the bladder neck (4).

5. A tyre curing bladder according to claim 1, wherein the width of the leading end (19) is 10-50% of the width of the gripping rim portion (5).