CN117002187A - Triangular rubber core with exhaust line structure and manufacturing method thereof - Google Patents
Triangular rubber core with exhaust line structure and manufacturing method thereof Download PDFInfo
- Publication number
- CN117002187A CN117002187A CN202310829033.6A CN202310829033A CN117002187A CN 117002187 A CN117002187 A CN 117002187A CN 202310829033 A CN202310829033 A CN 202310829033A CN 117002187 A CN117002187 A CN 117002187A
- Authority
- CN
- China
- Prior art keywords
- rubber core
- apex
- exhaust line
- hard
- soft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 17
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 23
- 239000010959 steel Substances 0.000 claims abstract description 23
- 239000004744 fabric Substances 0.000 claims abstract description 11
- 238000010618 wire wrap Methods 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 7
- 150000001875 compounds Chemical class 0.000 claims description 17
- 238000013329 compounding Methods 0.000 claims description 9
- 239000011324 bead Substances 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 6
- 239000011159 matrix material Substances 0.000 claims 4
- 239000002131 composite material Substances 0.000 abstract description 14
- 230000032798 delamination Effects 0.000 abstract description 9
- 230000008569 process Effects 0.000 abstract description 2
- 238000013461 design Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000013022 venting Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000004886 process control Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C15/00—Tyre beads, e.g. ply turn-up or overlap
- B60C15/04—Bead cores
- B60C15/05—Bead cores multiple, i.e. with two or more cores in each bead
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C15/00—Tyre beads, e.g. ply turn-up or overlap
- B60C15/04—Bead cores
- B60C2015/044—Bead cores characterised by a wrapping layer
Abstract
The invention relates to a triangular rubber core with an exhaust line structure and a manufacturing method thereof, wherein the triangular rubber core with the exhaust line structure comprises a steel ring and a rubber core base arranged at the upper part of the steel ring, the rubber core base is provided with a composite rubber core, the outer sides of the steel ring and the composite rubber ring are sequentially wrapped with a carcass layer and steel wire wrapping cloth, the composite rubber core comprises a soft triangular rubber core and a hard triangular rubber core, the inner sides of the soft triangular rubber core and the hard triangular rubber core are also provided with exhaust lines, the exhaust lines are composed of a plurality of raised semicircular exhaust line segments, the raised semicircular exhaust line segments are arranged at intervals, the exhaust lines extend along the circumferential direction of the carcass layer, and the raised parts of the exhaust lines are embedded into the carcass layer. In the production process of the tire, redundant gas in the apex can be discharged into an exhaust line, so that the delamination problem between the apex and a tire body in the production process is solved under the condition of not changing the existing technological process, and the delamination failure rate between the apex and the tire body cord fabric in the production process is reduced.
Description
Technical Field
The invention relates to the technical field of tire structures, in particular to a triangular rubber core with an exhaust line structure and a manufacturing method thereof.
Background
The existing wheeled vehicle runs on a highway, and the tire is used as the only contact part between the vehicle and the road surface, so that the tire plays a very important role, particularly, the truck and passenger car truck tire is used for transmitting driving force and braking force to the ground while bearing the whole load of the vehicle, changing and maintaining the running direction of the vehicle, absorbing the ground shock and the like.
This objective places particularly high demands on the tire, the key points of tire performance being mainly contour design, component design, carcass selection and process control. The component design and the process control complement each other, and in the component design, particularly the triangular rubber core, the reasonable triangular rubber core not only can improve the tire bead performance of the tire, but also can be matched with the process, so that the ring defect in the production process of the tire is reduced.
At present, the traditional triangular rubber core design is particularly suitable for the problem that the triangular rubber core is difficult to press from the bottom when the small-size partial vacuum tire is produced by a three-drum molding machine by a one-step method, and air bubbles and delamination are easy to occur between the triangular rubber core, particularly between a hard triangular rubber core and an inner tire body cord line.
Disclosure of Invention
In order to solve the problem that bubbles and delamination are easy to occur between a triangular rubber core, particularly a hard triangular rubber core and an inner tire body cord line, the invention provides a triangular rubber core with an exhaust line structure and a manufacturing method thereof.
The invention provides a triangular rubber core with an exhaust line structure, which comprises a steel ring and a rubber core base arranged at the upper part of the steel ring, wherein a composite rubber core is arranged on the rubber core base, the outer sides of the steel ring and the composite rubber ring are sequentially wrapped with a carcass layer and steel wire wrapping cloth, a filling rubber sheet is contacted with the outer sides of the carcass layer and the steel wire wrapping cloth, the composite rubber core comprises a soft triangular rubber core and a hard triangular rubber core, the hard triangular rubber core is tightly attached to the rubber core base, the bottom of the soft triangular rubber core is tightly attached to the top of the hard triangular rubber core, an exhaust line is further arranged at the inner sides of the soft triangular rubber core and the hard triangular rubber core, the exhaust line consists of a plurality of raised semicircular exhaust line segments, the raised semicircular exhaust line segments are arranged at intervals, the exhaust line extends along the circumferential direction of the carcass layer, and the raised part of the exhaust line is embedded into the carcass layer.
In some embodiments, a plurality of semicircular exhaust line segments are uniformly arranged, and the distance H1 between two adjacent exhaust line segments satisfies: h1 is more than or equal to 0.5mm and less than or equal to 1mm.
In some of these embodiments, the exhaust line segment height h satisfies: h is more than or equal to 0.5mm and less than or equal to 2mm.
In some embodiments, the distance H2 between the vent line and the core base satisfies: h2 is more than or equal to 5mm and less than or equal to 10mm.
In some of these embodiments, the distance H3 between the vent line and the end point of the hard triangular core remote from the core base satisfies: h3 is less than or equal to 10mm and less than or equal to 20mm.
The manufacturing method of the triangular rubber core with the exhaust line structure based on the same conception comprises the following steps: and (3) passing the corresponding rubber composition through a first die to form an uncured strip-shaped hard apex, passing the corresponding rubber composition through the first die to form an uncured strip-shaped soft apex, compounding the hard apex and the soft apex through compounding equipment to form a compound apex, extruding the compound apex from a second die on the compounding equipment, arranging a pressure exhaust line device at a corresponding position of the second die, extruding the compound apex, passing through the exhaust line device, forming an exhaust line on the inner side of the compound apex, and finally encircling the strip-shaped compound apex along the outer circumference of the tire bead to form a closed state.
In some embodiments, after the hard apex and the soft apex are compounded, the bottom of the soft apex is in close contact with the top of the hard apex.
In some embodiments, the top of the tire bead is further provided with a rubber core base, and the hard apex and the soft apex after compounding are surrounded to form a closed state along the outer circumference of the rubber core base.
In some embodiments, the hard apex is in close proximity to the apex base.
In some embodiments, the distance H2 between the vent line and the core base satisfies: h2 is more than or equal to 5mm and less than or equal to 10mm.
The invention has the beneficial effects that:
according to the invention, the exhaust line is arranged on the inner sides of the hard triangular rubber core and the soft triangular rubber core, most of the exhaust line is positioned on the inner side of the hard triangular rubber core, the exhaust line consists of a plurality of raised semicircular exhaust line segments, and the raised parts of the exhaust line are embedded into the tire body layer, so that a part of exhaust line capable of storing gas is formed between the triangular rubber core and the tire body, and in the tire production process, redundant gas in the triangular rubber core can be discharged into the exhaust line.
Drawings
FIG. 1 is a schematic illustration of a apex with vent line structure according to the present invention;
FIG. 2 is a schematic view of a triangular rubber core with an exhaust line structure according to another view angle of the present invention;
fig. 3 is an enlarged view of the structure of the region a shown in fig. 2.
110, steel ring in the attached drawing; 120. a rubber core base; 130. a composite rubber core; 131. a hard delta rubber core; 132. a soft triangle rubber core; 140. a carcass layer; 150. steel wire wrapping cloth; 160. filling the film; 170. an exhaust line; 180. an exhaust line segment.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
Examples of the embodiments are illustrated in the accompanying drawings, wherein like or similar symbols indicate like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
In the description of the present invention, it should be understood that the terms "top," "bottom," "inner," "outer," "axis," "circumferential," and the like indicate an orientation or a positional relationship based on that shown in the drawings, and are merely for convenience in describing the present invention or simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," "engaged," "hinged," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
Referring to fig. 1, 2 and 3, a triangle rubber core with an exhaust line 170 structure comprises a steel ring 110 and a rubber core base 120 arranged on the upper portion of the steel ring 110, wherein a composite rubber core 130 is arranged on the rubber core base 120, a carcass layer 140 and a steel wire wrapping cloth 150 are sequentially wrapped on the outer sides of the steel ring 110 and the composite rubber ring, a filling rubber sheet 160 is contacted on the outer sides of the carcass layer 140 and the steel wire wrapping cloth 150, the filling rubber sheet 160 is used for reinforcing firmness among the carcass layer 140, the steel wire wrapping cloth 150 and the composite rubber core 130, the carcass layer 140, the steel wire wrapping cloth 150 and the composite rubber core 130 in the production process of a tire are prevented from being deviated, the tire molding is affected, the composite rubber core 130 comprises a soft triangle rubber core 132 and a hard triangle rubber core 131, the hard triangle rubber core 131 is clung to the rubber core base 120, and the bottom of the soft triangle rubber core 132 is clung to the top of the hard triangle rubber core 131.
The inner sides of the soft triangular rubber core 132 and the hard triangular rubber core 131 are also connected with an exhaust line 170, the exhaust line 170 is composed of a plurality of raised semicircular exhaust line segments 180, the raised semicircular exhaust line segments 180 are arranged at intervals, the exhaust line 170 extends along the circumferential direction of the carcass layer 140, a groove is further formed at one side of the carcass layer 140, which is in contact with the composite rubber core 130, the raised part of the carcass layer 140 exhaust line 170 is embedded into the groove of the carcass layer 140, so that a part of the exhaust line 170 capable of storing gas is formed between the triangular rubber core and the carcass, and redundant gas in the triangular rubber core can be discharged into the exhaust line 170 in the tire production process.
In some embodiments of the present invention, the plurality of semicircular air discharge line segments 180 are uniformly arranged, and the distance between the air discharge line segments 180 is not too far or too close, which may result in too small a number of air discharge line segments 180, so that the air discharge line 170 may not hold the air in the hard apex 131 and the soft apex 132, and delamination may occur between the carcass layer 140 and the soft apex 132 and the hard apex 131. If too close, too many vent segments 180 between carcass layer 140 and soft apex 132 and hard apex 131 may result, as well as delamination between carcass layer 140 and soft apex 132 and hard apex 131. Therefore, the distance between the air exhaust line segments 180 is extremely important, and after multiple tests, when the distance H1 between two adjacent air exhaust line segments 180 is smaller than or equal to 0.5mm and smaller than or equal to 1mm, the air exhaust effect of the air exhaust line 170 is better, the firmness degree between the carcass layer 140 and the soft apex 132 and the hard apex 131 is stronger, and when the distance H1 between the air exhaust line segments 180 is 0.75mm, the optimal distance is obtained.
In some embodiments of the present invention, the height of the air discharge line segment 180 is also important, and the height h of the air discharge line segment 180 satisfies: when h is equal to or greater than 0.5mm and equal to or less than 2mm, the optimal data value range of the height of the air exhaust line segment 180 is that the height of the air exhaust line segment 180 is too large or too small, and delamination phenomenon exists between the carcass layer 140 and the soft apex 132 and the hard apex 131, wherein when the height h of the air exhaust line segment 180 is 1.25, the air exhaust effect of the air exhaust line 170 is optimal.
In some embodiments of the present invention, the distance H2 of the vent line 170 from the core base 120 at the bottom of the hard triangular core 131 is as follows: the distance H3 between the exhaust line 170 and the end point of the hard triangle rubber core 131 far from the rubber core base 120 is equal to or less than 5mm and equal to or less than 10mm, and the distance H3 is as follows: h3 is less than or equal to 10mm and less than or equal to 20mm. So that the exhaust line 170 can be well laid on the hard apex 131.
The application effect is as follows:
the applicant has applied to the exquisite 255/70R22.5 specification tire, can reduce the delamination problem between triangular rubber core and carcass effectively, the durable lathe detection of tire indoor bead promotes more than 6% (the indoor lathe test is in the harsh driving condition of indoor simulation. The final result of driving is regarded as the important index to measure the crown portion performance of the wheel, the higher the speed of passing, the more superior its performance embodiment), specifically as follows:
table 1 delamination problem improvement effect contrast:
table 2 machine tool comparison:
the invention also provides a manufacturing method of the triangular rubber core with the exhaust line 170 structure, which comprises the following steps: the corresponding rubber composition is passed through a first die to form an uncured strip-shaped hard apex 131, the corresponding rubber composition is passed through the first die to form an uncured strip-shaped soft apex 132, after the hard apex 131 and the soft apex 132 are compounded by compounding equipment to form a compound apex 130, the compound apex is extruded from a second die on the compounding equipment, a venting line 170 is arranged at a corresponding position of the second die, after the compound apex 130 is extruded, the venting line 170 is arranged through the venting line 170, the inner side of the compound apex 130 is formed into a venting line 170, and finally the strip-shaped compound apex 130 is formed to be closed along the outer circumference of the tire bead, wherein a carcass layer 140 laid on the side surface of the compound apex 130 is provided with a groove for placing the venting line 170. The exhaust line 170 is composed of a plurality of raised semicircular exhaust line segments 180, the plurality of raised semicircular exhaust line segments 180 are arranged at intervals, the exhaust line 170 extends along the circumferential direction of the carcass layer 140, a groove is further formed on one side, in contact with the composite rubber core 130, of the carcass layer 140, a raised portion of the exhaust line 170 of the carcass layer 140 is embedded into the groove of the carcass layer 140, so that a part of the exhaust line 170 capable of storing gas is formed between the triangular rubber core and the carcass layer 140, and in the tire production process, redundant gas in the triangular rubber core can be discharged into the exhaust line 170.
In some embodiments of the present invention, after the hard apex 131 and the soft apex 132 are compounded, the bottom of the soft apex 132 is tightly attached to the top of the hard apex 131. The top of the tire bead is also provided with a rubber core base 120, and the hard triangular rubber core 131 and the soft triangular rubber core 132 after being compounded are formed to be closed along the outer circumference of the rubber core base 120 in a surrounding mode. The hard triangular rubber core 131 is tightly attached to the rubber core base 120. The distance H2 between the exhaust wire 170 and the core base 120 satisfies: the air exhausting effect of the air exhausting line 170 is good, the firm degree between the carcass layer 140 and the soft triangle rubber core 132 and the hard triangle rubber core 131 is strong, and the distance H1 between the air exhausting line segments 180 is the optimal distance when the distance H1 is 0.75 mm.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "examples," "particular examples," "one particular embodiment," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The present invention is not limited to the above preferred embodiments, and any person skilled in the art, within the scope of the present invention, may apply to the present invention, and equivalents and modifications thereof are intended to be included in the scope of the present invention.
Claims (10)
1. The utility model provides a triangle rubber core with exhaust line structure, its characterized in that, including the steel ring with set up in the rubber core base of steel ring upper portion, be equipped with compound rubber core on the rubber core base, the steel ring with the outside of compound rubber ring is wrapped up in proper order has matrix layer and steel wire wrapping cloth, matrix layer with the outside contact of steel wire wrapping cloth has the filling film, compound rubber core includes soft triangle rubber core and hard triangle rubber core, hard triangle rubber core with the rubber core base is hugged closely, the bottom of soft triangle rubber core with the top of hard triangle rubber core is hugged closely, soft triangle rubber core with the inboard of hard triangle rubber core still is equipped with the exhaust line, the exhaust line comprises a plurality of bellied semicircular exhaust line sections, and a plurality of bellied semicircular exhaust line section interval sets up, the exhaust line extends along the circumference of matrix layer, the bellied part of exhaust line is embedded into in the matrix layer.
2. The tire apex with vent line structure of claim 1, wherein a plurality of semicircular vent line segments are uniformly arranged, and a distance H1 between two adjacent vent line segments satisfies: h1 is more than or equal to 0.5mm and less than or equal to 1mm.
3. The apex with vent line structure of claim 1, wherein the vent line segment height h satisfies: h is more than or equal to 0.5mm and less than or equal to 2mm.
4. The apex with vent line structure of claim 1, wherein the distance H2 of the vent line from the apex base satisfies: h2 is more than or equal to 5mm and less than or equal to 10mm.
5. The apex with vent wire structure of claim 1, wherein the distance H3 between the vent wire and the end point of the hard apex remote from the apex base satisfies: h3 is less than or equal to 10mm and less than or equal to 20mm.
6. The manufacturing method of the triangular rubber core with the exhaust line structure is characterized by comprising the following steps of: and (3) passing the corresponding rubber composition through a first die to form the hard apex rubber core in an uncured strip shape, passing the corresponding rubber composition through the first die to form the soft apex rubber core in an uncured strip shape, extruding the hard apex rubber core and the soft apex rubber core from a second die on the compounding equipment after compounding the hard apex rubber core and the soft apex rubber core through the compounding equipment, wherein a pressure exhaust line device is arranged at the corresponding position of the second die, and passing through the exhaust line device after extruding the compound rubber core to form an exhaust line on the inner side of the compound rubber core, and finally encircling the strip-shaped compound rubber core along the outer circumference of a tire bead to form a closed state.
7. The method of claim 6, wherein the bottom of the soft apex is in close contact with the top of the hard apex after the hard apex and the soft apex are combined.
8. The method of claim 6, wherein the bead is further provided with the core base at the top, and the hard apex and the soft apex after being combined are formed to be closed around the outer circumference of the core base.
9. The method of claim 8, wherein the hard apex is in close contact with the apex base.
10. The method for manufacturing a triangular rubber core with an exhaust line structure according to claim 9, wherein the distance H2 between the exhaust line and the rubber core base is as follows: h2 is more than or equal to 5mm and less than or equal to 10mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310829033.6A CN117002187A (en) | 2023-07-07 | 2023-07-07 | Triangular rubber core with exhaust line structure and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310829033.6A CN117002187A (en) | 2023-07-07 | 2023-07-07 | Triangular rubber core with exhaust line structure and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117002187A true CN117002187A (en) | 2023-11-07 |
Family
ID=88566516
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310829033.6A Pending CN117002187A (en) | 2023-07-07 | 2023-07-07 | Triangular rubber core with exhaust line structure and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117002187A (en) |
-
2023
- 2023-07-07 CN CN202310829033.6A patent/CN117002187A/en active Pending
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