CN110962381A - Tire turn-up capsule and preparation method thereof - Google Patents
Tire turn-up capsule and preparation method thereof Download PDFInfo
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- CN110962381A CN110962381A CN201911358049.3A CN201911358049A CN110962381A CN 110962381 A CN110962381 A CN 110962381A CN 201911358049 A CN201911358049 A CN 201911358049A CN 110962381 A CN110962381 A CN 110962381A
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- outer layer
- tire
- sub
- opening end
- turn
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/08—Building tyres
- B29D30/20—Building tyres by the flat-tyre method, i.e. building on cylindrical drums
- B29D30/24—Drums
- B29D30/26—Accessories or details, e.g. membranes, transfer rings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/08—Building tyres
- B29D30/20—Building tyres by the flat-tyre method, i.e. building on cylindrical drums
- B29D30/24—Drums
- B29D30/26—Accessories or details, e.g. membranes, transfer rings
- B29D2030/2614—Bladders associated with the building drum, e.g. bladders used for the toroidal expansion, bladders for turning-up the plies
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tyre Moulding (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention discloses a tire turn-up bladder and a preparation method thereof, and relates to the technical field of tire turn-up bladders. The middle body is of a double-layer structure, the inner layer is of an integral structure, the outer layer is formed by splicing a first outer layer and a second outer layer at a connecting part and is attached to the outer side of the inner layer, the first outer layer is connected to the first sub-opening end from the connecting part through a first bending part, the second outer layer is connected to the second sub-opening end from the connecting part through a second bending part, and the connecting part is arranged on the middle body which is far away from the first sub-opening end and is close to the first bending part; the first outer layer and the second outer layer are connected by inclined planes. Compared with the prior art, the invention has the beneficial effects that: combining the structure with the performance of the rubber sheet, changing the profile track of the tire turn-up bladder when inflated and expanded, realizing that the tire turn-up bladder close to one side of the green tire continuously bulges, always keeps contact with the tire body cord fabric, and gradually presses the tire body cord fabric to the tire bead to be attached; the air exhaust is thorough, and the fitting degree between the steel wire ring and the cord fabric layer is enhanced.
Description
Technical Field
The invention relates to the technical field of tire turn-up capsules, in particular to a tire turn-up capsule and a preparation method thereof.
Background
The tire forming mode comprises one-time forming and secondary forming, wherein the tire body cord fabric of the tire can be reversely wrapped by the tire reverse wrapping capsule in the secondary forming; the general process is that the tire turn-up bladder is inflated to be expanded, meanwhile, the booster acts to push the tire turn-up bladder to the green tire, the gradually expanded tire turn-up bladder contacts the green tire and generates a pressing acting force to the green tire, gas between the steel wire ring at the tire bead part of the tire and the cord fabric layer can be discharged, the attaching degree between the steel wire ring and the cord fabric layer is enhanced, and further the effects of avoiding the phenomena of bubbles and delamination between the steel wire ring and the cord fabric layer are achieved.
According to the use feedback of customers, the tire turn-up bladder has the following problems that when the ① tire turn-up bladder is inflated and expanded, the progressive property is poor when the tire turn-up bladder is contacted with the tire bead part, the gas expelling effect is still to be improved, and when the ② tire turn-up bladder is arranged on a forming machine for inflation, the sealing of the assembly part is difficult.
Disclosure of Invention
The invention provides a tire turn-up bladder and a preparation method thereof, which improve the structure of the tire turn-up bladder and solve the technical problems by combining the preparation method of the tire turn-up bladder.
The specific technical scheme is that the tire turn-up capsule comprises: the middle body, the first bending part, the second bending part, the first sub-opening end and the second sub-opening end; the two end parts of the middle body are respectively a first sub-opening end and a second sub-opening end, and the first sub-opening end and the second sub-opening end are both connected with a clamping edge block; a first bending part is arranged between the middle body and the first seam allowance end, and a second bending part is arranged between the middle body and the second seam allowance end;
the middle body is of a double-layer structure, the inner layer is of an integral structure, the outer layer is formed by splicing a first outer layer and a second outer layer at a connecting part and is attached to the outer side of the inner layer, the first outer layer is connected to the first sub-opening end from the connecting part through a first bending part, the second outer layer is connected to the second sub-opening end from the connecting part through a second bending part, and the connecting part is arranged on the middle body which is far away from the first sub-opening end and is close to the first bending part; the first outer layer and the second outer layer are connected by inclined planes.
Further, the distance between the first bending part and the first sub-opening end is smaller than the distance between the second bending part and the second sub-opening end. When the tire is installed on a forming machine, the first bead end is close to one side of a green tire, the distance between the first bending part and the first bead end is short, and in the initial inflation stage, the first bending part is firstly bulged and contacts the tire body cord fabric at the lower position to press the tire body cord fabric to the tire bead, so that the gas is more thoroughly exhausted.
Furthermore, a convex structure is arranged on the outer wall of the joint of the first sub-port end and the edge clamping block, a first protrusion is close to the edge clamping block, a second protrusion is far away from the edge clamping block, a concave structure formed between the edge clamping block and the first protrusion is called a first groove, and a concave structure formed between the first protrusion and the second protrusion is called a second groove. Annular sealing rings are embedded in the first groove and the second groove, so that the mounting firmness and the sealing performance of the tire turn-up bladder are improved.
Further, the cross sections of the first protrusion and the second protrusion are arc-shaped. There is the second recess between first arch and the second arch, when assembling with the make-up machine, the annular seal ring can be placed to second recess inside, and the shaping chance forms certain fastening power to first arch and second arch 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 first protrusion is larger than or equal to that of the second protrusion. Annular sealing rings are embedded in the first groove and the second groove so as to improve the mounting firmness and the sealing property of the tire turn-up bladder; when the second bulge is damaged after being used for multiple times, the higher first bulge cannot be easily separated. The device is checked regularly in production, and when the second bulge is found to be damaged, the use safety of the tire turn-up bladder can be reminded in advance.
A preparation method of a tire turn-up bladder comprises the steps of preparing the tire turn-up bladder; the first outer layer and the second outer layer are different in film, and the elasticity of the film used for the first outer layer is larger than that of the film used for the second outer layer; the film used for the second outer layer is different from the film used for the inner layer, and the elasticity of the film used for the inner layer is larger than that of the film used for the second outer layer. The inlayer material is unanimous, and the second skin plays certain constraint effect to the inflation of the inlayer of its inboard, and first outer flexible ability is stronger than the second skin simultaneously.
Further, the films used for the first outer layer and the inner layer are the same.
Further, the films used in the first outer layer and the inner layer are different, and the elasticity of the film used in the first outer layer is larger than that of the film used in the inner layer.
Furthermore, the films used for the first outer layer and the inner layer are different, and the elasticity of the film used for the first outer layer is smaller than that of the film used for the inner layer. The first outer layer plays a certain role in restraining the swelling of the inner layer on the inner side.
If the outer layer does not exist, namely the existing tire turn-up bladder is the same in the expansion degree of each part of the tire turn-up bladder during inflation, the tire turn-up bladder is poor in progressiveness when contacting with the tire bead part, the tire body cord fabric cannot be continuously pressed, and gas between the steel wire ring and the cord fabric layer at the tire bead part is continuously expelled. In the invention, the middle body is designed into a double-layer structure, the inner layer is an integral structure, the outer layer is a structure formed by splicing different films, and the elasticity of the film used by the first outer layer is greater than that of the film used by the second outer layer; when the tire is inflated, the tire turn-up bladder close to one side of the green tire is better than the tire turn-up bladder far away from one side of the green tire to bulge, and the expansion degree of the tire turn-up bladder close to one side of the green tire is larger than that of the tire turn-up bladder far away from one side of the green tire; when the first bending part is firstly bulged and contacts with the tire body cord fabric at a lower position, the side can be continuously bulged and always keeps contact with the tire body cord fabric and gradually presses the tire body cord fabric to the tire bead to enable the tire body cord fabric to be attached, and in the process, the air between the steel wire ring and the cord fabric layer at the tire bead part of the tire is continuously expelled without the opportunity of returning inwards; the exhaust is more thorough.
Compared with the prior art, the invention has the beneficial effects that: the structure of the tire turn-up bladder is improved, the structure is combined with the performance of the rubber sheet, the profile track of the tire turn-up bladder during inflation and expansion is changed, the tire turn-up bladder close to one side of the green tire is continuously expanded, the tire turn-up bladder is always kept in contact with the tire body cord fabric, and the tire body cord fabric is gradually pressed to the tire bead to be attached; the exhaust is thorough, the fitting degree between the steel wire ring and the cord fabric layer is enhanced, and the effects of avoiding the phenomena of bubbles and delamination between the steel wire ring and the cord fabric layer are further achieved; the design is carried out to the macrostoma end, can improve the steadiness and the leakproofness of tire turn-up bladder and make-up machine assembly.
Drawings
FIG. 1 is a schematic cross-sectional view of a turn-up bladder of a tire according to the present invention;
FIG. 2 is a schematic view of the structure of the connection part;
FIG. 3 is a schematic view showing the effect of the tire turn-up bladder in the present invention.
1. The tyre comprises a middle body, 2, a first bent part, 3, a second bent part, 4, a first sub-opening end, 5, a second sub-opening end, 6, a connecting part, 7, an inner layer, 8, a first outer layer, 9, a second outer layer, 10, a first protrusion, 11, a second protrusion, 12, a first groove, 13, a second groove, 14, a clamping edge block, 15, a tyre turn-up capsule, 16, turn-up glue, 17, a steel wire ring, 18 and a forming machine.
Detailed Description
The following description of the embodiments of the present invention refers to the accompanying drawings and examples:
it should be noted that the structures, proportions, sizes, and other dimensions shown in the drawings and described in the specification are only for the purpose of understanding and reading the present disclosure, and are not intended to limit the scope of the present disclosure, which is defined by the following claims, and all modifications, proportions, changes, and variations of the structures, and dimensions which are within the scope of the present disclosure are not to be considered as limiting the present disclosure.
In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
Referring to fig. 1-2, a tire turn-up bladder comprises: the middle body 1, the first bent part 2, the second bent part 3, the first sub-opening end 4 and the second sub-opening end 5; the two end parts of the middle body 1 are respectively a first sub-opening end 4 and a second sub-opening end 5, and the first sub-opening end 4 and the second sub-opening end 5 are both connected with a clamping edge block 14; a first bent part 2 is arranged between the middle body 1 and the first sub-opening end 4, and a second bent part 3 is arranged between the middle body 1 and the second sub-opening end 5;
the middle body 1 has a double-layer structure, the inner layer 7 is an integral structure, the outer layer is formed by splicing a first outer layer 8 and a second outer layer 9 at a connecting part 6 and is attached to the outer side of the inner layer 7, the first outer layer 8 is connected to the first sub-mouth end 4 from the connecting part 6 through a first bending part 2, the second outer layer 9 is connected to the second sub-mouth end 5 from the connecting part 6 through a second bending part 3, and the connecting part 6 is arranged on the middle body 1 which is far away from the first sub-mouth end 4 and is close to the first bending part 2; the first outer layer 8 and the second outer layer 9 are connected in a bevel manner. The connecting portion 6 is circled in fig. 1, and fig. 2 is an enlarged structure diagram thereof.
The distance between the first bending part 2 and the first sub-opening end 4 is smaller than the distance between the second bending part 3 and the second sub-opening end 5. When the tire is installed on a forming machine, the first sub-opening end 4 is close to one side of a green tire, the distance between the first bent part 2 and the first sub-opening end 4 is short, in the initial inflation stage, the first bent part 2 is firstly bulged and contacts the tire body cord fabric at the lower position to compress the tire body cord fabric to the tire bead, and the gas is discharged more thoroughly.
The outer wall of the joint of the first sub-mouth end 4 and the clamping edge block 14 is provided with a convex structure, a first protrusion 10 is arranged close to the clamping edge block 14, a second protrusion 11 is arranged far away from the clamping edge block 14, a concave structure formed between the clamping edge block 14 and the first protrusion 10 is called a first groove 12, and a concave structure formed between the first protrusion 10 and the second protrusion 11 is called a second groove 13. Annular sealing rings are embedded in the first groove 12 and the second groove 13, so that the installation firmness and the sealing performance of the tire turn-up bladder are improved.
The first protrusion 10 and the second protrusion 11 have an arc-shaped cross section. There is the second recess between first arch and the second arch, when assembling with the make-up machine, the annular seal ring can be placed to second recess inside, and the shaping chance forms certain fastening power to first arch and second arch 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.
The height of the first protrusion 10 is greater than or equal to the height of the second protrusion 11. Annular sealing rings are embedded in the first groove 12 and the second groove 13, so that the mounting firmness and the sealing performance of the tire turn-up bladder are improved; when the second protrusion 11 is damaged after multiple uses, the higher first protrusion 10 will not easily fall off. The device is checked regularly in production, and when the second bulge 11 is found to be damaged, the use safety of the tire turn-up bladder can be reminded in advance.
A preparation method of a tire turn-up bladder comprises the steps of preparing the tire turn-up bladder; the films used for the first outer layer 8 and the second outer layer 9 are different, and the elasticity of the film used for the first outer layer 8 is larger than that of the film used for the second outer layer 9; the second outer layer 9 is made of a film different from the film used for the inner layer 7, and the film used for the inner layer 7 has elasticity greater than that of the film used for the second outer layer 9. The inner layer 7 is made of the same material, the second outer layer 9 plays a certain binding role in the expansion of the inner layer 7 on the inner side, and meanwhile, the telescopic capacity of the first outer layer 8 is stronger than that of the second outer layer 9.
On the basis of the above, the films used for the first outer layer 8 and the inner layer 7 can be the same; it may be different that the first outer layer 8 and the inner layer 7 are made of different films, and the elasticity of the film used for the first outer layer 8 is larger than that of the film used for the inner layer 7, or the elasticity of the film used for the first outer layer 8 is smaller than that of the film used for the inner layer 7, and the film used for the first outer layer 8 is different from that of the inner layer 7.
If the outer layer does not exist, namely the existing tire turn-up bladder is the same in the expansion degree of each part of the tire turn-up bladder during inflation, the tire turn-up bladder is poor in progressiveness when contacting with the tire bead part, the tire body cord fabric cannot be continuously pressed, and gas between the steel wire ring and the cord fabric layer at the tire bead part is continuously expelled. In the invention, the middle body 1 is designed into a double-layer structure, the inner layer 7 is an integral structure, the outer layer is a structure formed by splicing different films, and the elasticity of the film used by the first outer layer 8 is greater than that of the film used by the second outer layer 9; FIG. 3 is a schematic view showing the effect of the tire turn-up bladder in the present invention; the tire turn-up bladder 15 is arranged on a forming machine 18, is close to the turn-up bladder 16 under the action of a booster, inflates the interior of the tire turn-up bladder 15, the tire turn-up bladder close to one side of the green tire is better than the tire turn-up bladder far away from one side of the green tire, and the expansion degree of the tire turn-up bladder close to one side of the green tire is larger than that of the tire turn-up bladder far away from one side of the green tire; when the first bending part 2 is firstly bulged and contacts the turn-up rubber 16 at a lower position, the side can be continuously bulged and always keeps contact with the turn-up rubber 16 and gradually presses the turn-up rubber 16 to the tire bead to be attached, and in the process, the gas between the steel wire ring 17 and the cord fabric layer at the tire bead part is continuously expelled without the opportunity of returning inwards; the exhaust is more thorough.
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, but only by the scope of the appended claims.
Claims (9)
1. A tire turn-up bladder comprising: a middle body (1), a first bending part (2), a second bending part (3), a first sub-opening end (4) and a second sub-opening end (5),
the two end parts of the middle body (1) are respectively provided with a first sub-opening end (4) and a second sub-opening end (5), and the first sub-opening end (4) and the second sub-opening end (5) are both connected with a clamping edge block (14); a first bent part (2) is arranged between the middle body (1) and the first sub-opening end (4), and a second bent part (3) is arranged between the middle body (1) and the second sub-opening end (5);
the middle body (1) is of a double-layer structure, the inner layer (7) is of an integral structure, the outer layer is formed by splicing a first outer layer (8) and a second outer layer (9) at a connecting part (6) and is attached to the outer side of the inner layer (7), the first outer layer (8) is connected with the connecting part (6) through a first bent part (2) to a first sub-opening end (4), the second outer layer (9) is connected with the connecting part (6) through a second bent part (3) to a second sub-opening end (5), and the connecting part (6) is arranged on the middle body (1) far away from the first sub-opening end (4) and close to the first bent part (2); the first outer layer (8) is connected with the second outer layer (9) in an inclined way.
2. The tire turn-up bladder according to claim 1, wherein the distance between the first bent portion (2) and the first sub-opening end (4) is smaller than the distance between the second bent portion (3) and the second sub-opening end (5).
3. A tyre turn-up bladder according to claim 1, wherein the outer wall of the junction of the first sub-mouth end (4) and the gripping edge block (14) has a raised structure, a first protrusion (10) is provided near the gripping edge block (14), a second protrusion (11) is provided far from the gripping edge block (14), a recessed structure is provided between the gripping edge block (14) and the first protrusion (10) and is referred to as a first groove (12), and a recessed structure is provided between the first protrusion (10) and the second protrusion (11) and is referred to as a second groove (13).
4. A tyre turn-up bladder according to claim 3, wherein the first (10) and second (11) protrusions are arcuate in cross-section.
5. A tyre turn-up bladder according to claim 3, wherein the height of the first protrusions (10) is greater than or equal to the height of the second protrusions (11).
6. A method for producing a tire turn-up bladder according to any one of claims 1 to 5, wherein the first outer layer (8) and the second outer layer (9) are made of different rubber sheets, and the rubber sheet for the first outer layer (8) has a greater elasticity than the rubber sheet for the second outer layer (9); the film used by the second outer layer (9) is different from the film used by the inner layer (7), and the elasticity of the film used by the inner layer (7) is larger than that of the film used by the second outer layer (9).
7. A method for preparing a tyre turn-up bladder as claimed in claim 6, wherein the first outer layer (8) and the inner layer (7) are made of the same rubber sheet.
8. The method for preparing a tire turn-up bladder according to claim 6, wherein the first outer layer (8) and the inner layer (7) are made of different rubber sheets, and the rubber sheet for the first outer layer (8) has elasticity greater than that of the rubber sheet for the inner layer (7).
9. The method for preparing a tire turn-up bladder according to claim 6, wherein the first outer layer (8) and the inner layer (7) are made of different rubber sheets, and the rubber sheet for the first outer layer (8) has a smaller elasticity than the rubber sheet for the inner layer (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911358049.3A CN110962381B (en) | 2019-12-25 | 2019-12-25 | Tire turn-up capsule and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911358049.3A CN110962381B (en) | 2019-12-25 | 2019-12-25 | Tire turn-up capsule and preparation method thereof |
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| CN110962381A true CN110962381A (en) | 2020-04-07 |
| CN110962381B CN110962381B (en) | 2022-03-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112140605A (en) * | 2020-09-21 | 2020-12-29 | 山东玲珑轮胎股份有限公司 | All-steel combined type capsule locking ring |
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| US5405484A (en) * | 1994-03-22 | 1995-04-11 | Bridgestone/Firestone, Inc. | Tire building drum |
| JP2004202992A (en) * | 2002-12-26 | 2004-07-22 | Bridgestone Corp | Tire molding side bladder |
| CN203792732U (en) * | 2014-04-30 | 2014-08-27 | 桦林佳通轮胎有限公司 | Tire forming reverse wrapping capsule with annular positioning reinforcing band |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112140605A (en) * | 2020-09-21 | 2020-12-29 | 山东玲珑轮胎股份有限公司 | All-steel combined type capsule locking ring |
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| Publication number | Publication date |
|---|---|
| CN110962381B (en) | 2022-03-01 |
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