CN112078306A - Tire and belted layer design structure - Google Patents
Tire and belted layer design structure Download PDFInfo
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- CN112078306A CN112078306A CN202010790954.2A CN202010790954A CN112078306A CN 112078306 A CN112078306 A CN 112078306A CN 202010790954 A CN202010790954 A CN 202010790954A CN 112078306 A CN112078306 A CN 112078306A
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- 238000013461 design Methods 0.000 title claims abstract description 24
- 238000004073 vulcanization Methods 0.000 claims abstract description 35
- 238000007493 shaping process Methods 0.000 claims description 22
- 238000010030 laminating Methods 0.000 claims description 7
- 238000005096 rolling process Methods 0.000 abstract description 9
- 239000011159 matrix material Substances 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 7
- 239000004744 fabric Substances 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 238000003825 pressing Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 238000004804 winding Methods 0.000 description 4
- 238000009826 distribution Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 238000005336 cracking Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000001131 transforming effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Classifications
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- 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
- B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
- B60C9/18—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers
- B60C9/20—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel
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- 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
- B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
- B60C9/18—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers
- B60C9/20—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel
- B60C2009/2012—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel with particular configuration of the belt cords in the respective belt layers
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
Abstract
The invention relates to the technical field of heavy-duty tires, and discloses a tire which comprises: the layer is restrainted to child hat, matrix and four layers, and the four layers are restrainted the layer and are set up between child hat and matrix, and the four layers are restrainted the layer and include: the invention also provides a belt layer design structure which improves the grounding performance, rolling resistance and durability of the tire and has no damage to the crack resistance performance of an edge ditch, the belt layer design structure utilizes adjustment of belt layer rubber or rubber sheets to adjust the crack rate of the vulcanization forming of the zero belt position, and the belt layer design structure ensures that the vulcanization forming crack rate of the zero belt position is uniform, and the inflation of the tire crown is optimized.
Description
Technical Field
The invention relates to the technical field of heavy-duty tires, in particular to a tire and a belted layer design structure.
Background
The existing truck tire in the overload market mostly adopts a 3-layer belt ply and zero-degree winding double-endurance belt ply design, the design requires that the zero-degree belt ply outer end point is consistent with the edge width of a 1# belt ply so as to control the inflation and expansion of the tire shoulder position under the high air pressure condition, and the increase of the tire shoulder mark length in the use process of the tire is limited so as to prolong the service life of the tire.
In order to match with the increase of the outer diameter of the tire blank during vulcanization and shaping, the zero-degree winding mostly adopts a high-elongation cord so as to utilize the low-stress elongation characteristic of the cord, so that the tire can finish the shaping of the tire blank under the lower cord tension, and the risk of uneven tire inside is reduced.
Because the conventional belted layer laminating drum is a plane drum, a running surface of a tire model has a certain radian, the elongation of a crown high-elongation cord thread is uneven, if the problem of uneven tire inside is prevented, the elongation of the high-elongation cord thread at the position of the crown close to the crown needs to be controlled so as to reduce the tension of the high-elongation cord thread at the position of the crown during shaping, the elongation of the high-elongation cord thread at the position close to a tire shoulder is insufficient, the inflation and expansion of the tire shoulder position under the high-air pressure condition are difficult to control, so that the uneven inflation and expansion of the running surface at the zero-degree belted tire shoulder position occurs, the distribution of the pressure of a footprint is uneven, and the. And if differential inflation occurs at the shoulder groove locations, this will cause the groove bottom splits to grow faster, resulting in a reduction in the resistance of the tire to side-groove splits.
The zero-degree monofilaments are wound and matched with the curved belt ply fitting drum, so that the problem of uneven deformation of inflation of the crown part of the tire can be controlled, but the method needs to transform forming equipment, and meets the requirement on the design of the crown arc line of the mold, so that the method is difficult to popularize.
Disclosure of Invention
In some embodiments of the present application, a tire is provided, wherein the belt design is composed of a 1# belt, a 2# belt, a 3# belt and a zero-degree belt to solve the problems of uneven inflation of the driving surface at the zero-degree belt shoulder position, uneven distribution of footprint pressure, resulting in rolling resistance and reduction of durability, and reduction of the split resistance of the tire.
In some embodiments of the present application, a tire is disclosed, comprising: the layer is restrainted to child hat, matrix and four layers, and the four layers are restrainted the layer and are set up between child hat and matrix, and the four layers are restrainted the layer and include: the tire comprises a 1# belt ply, a 2# belt ply, a 3# belt ply and two zero belt plies symmetrically arranged on the shoulder parts of a tire, wherein the 1# belt ply, the 2# belt ply and the 3# belt ply are sequentially attached and connected to each other from a tire body to the tire crown direction in the middle of the tire crown along the radial direction, and the zero belt plies are arranged at two axial ends of the 3# belt ply and are connected with the 2# belt ply in a laminating manner.
In some embodiments of the present application, to solve the above technical problem, the present invention adopts the following technical solutions: the 2# belt ply extends to a vertical line from a shoulder point to a main curtain cloth layer of the tire, the distance from the outer end point of the 2# belt ply to the outer end point of the 1# belt ply is set as a, the distance from the outer end point of the 1# belt ply to the inner end point of a zero-degree belt ply is set as b, the distance from the outer end point of the 2# belt ply to the outer end point of the zero-degree belt ply is set as c, the width of the zero-degree belt ply is set as d, wherein a is more than or equal to 20mm and less than or equal to 25mm, c is more than or equal to 8mm and less: b/d is more than or equal to 0.5 and less than or equal to 0.66, the design of the belted layer can homogenize the stretching rate of vulcanization molding at the zero-degree belted position under the condition of not transforming molding equipment, optimize inflation and expansion of the crown of the tire, further improve the grounding performance, rolling resistance performance and durability of the tire, and improve the performance of resisting the crack of the side ditch. And the degree of freedom in tire design is also increased.
In some embodiments of the present application, the # 1 belt layer is disposed on the carcass in a fitting manner, and a main ply is disposed between the # 1 belt layer and the carcass, the # 2 belt layer is disposed on an upper end surface of the # 1 belt layer, a width of the # 2 belt layer is greater than a width of the # 1 belt layer, the # 3 belt layer is disposed on the # 2 belt layer, and a width of the # 3 belt layer is less than a width of the # 3 belt layer;
two tire shoulders of tire all are provided with the one deck zero degree area is restrainted the layer or radially sets gradually from inside to outside two-layer zero degree area is restrainted the layer, zero degree area is restrainted the layer and is all followed tire shoulder circumference encircles, 3# is restrainted the layer and two tire shoulder zero degree area is restrainted the layer and all is laid in the surface of 2# area and is restrainted the layer.
In some embodiments of the present application, the 1# belt layer edge is wrapped with a film, and the film is used for adjusting the stretch rate of the zero-degree belt position vulcanization setting.
In some embodiments of the present application, the two ends of the # 2 belt extend to the shoulder point of the tire, respectively, and the two ends of the # 2 belt are aligned with the vertical line of the main ply.
In some embodiments of the present application, the zero degree belt is provided as a high elongation cord.
In some embodiments of the present application, the crown outer surface is provided with a plurality of inward recessed grooves along the tire circumferential direction, the groove bottom of the groove is to the zero belt inner end point is not less than 5 mm.
In some embodiments of the present application, a tire belt design structure includes a # 1 belt, a # 2 belt, a # 3 belt, and a zero belt, the No. 1 belted layer, the No. 2 belted layer and the No. 3 belted layer are sequentially connected with the two axial ends of the No. 3 belted layer in a pressing way from inside to outside along the radial direction of the tire, zero belted layers are respectively paved on the two axial ends of the No. 3 belted layer, the zero-degree belt layer and the No. 2 belt layer are combined and connected, the axial end points of the No. 2 belt layer protrude out of the No. 1 belt layer and the zero-degree belt layer along the direction departing from the center of the tire, the distance from the outer end point of the No. 2 belt layer to the outer end point of the No. 1 belt layer is set as a, the distance from the outer end point of the No. 1 belt layer to the inner end point of the zero-degree belt layer is set as b, the distance from the outer end point of the No. 2 belted layer to the outer end point of the zero-degree belted layer is set as c, and the width of the zero-degree belted layer is set as d; wherein a is more than or equal to 20mm and less than or equal to 25mm, c is more than or equal to 8mm and less than or equal to 12mm, d is more than or equal to 25mm and less than or equal to 34mm, and the ratio of b to d satisfies the following conditions: b/d is more than or equal to 0.5 and less than or equal to 0.66.
In some embodiments of the application, the 1# belt layer edge uses the film with the thickness of 0.6-0.8 mm and the width of 20-30 mm to cover the edge, and when the relation is satisfied, the tire can obtain the uniform zero-degree belt position vulcanization shaping elongation and has enough manufacturability.
When the thickness of the rubber sheet is more than 0.8mm, the air pocket phenomenon exists in the process of attaching the belt ply, and the requirement of production manufacturability is difficult to meet; when the thickness of the rubber sheet is less than 0.6mm, the uniform vulcanization shaping elongation at the zero-degree belt bundle position is difficult to obtain.
In some embodiments of the present application, the zero degree belt is provided as a high elongation cord structure characterized in that the cord structure has an elongation in the range of 1.5% to 2.2%; the vulcanization shaping elongation rate range of the zero-degree belted beam is 0.8% -1.3%, and when the relation is met, the zero-degree belted beam can balance the prevention of uneven tire inner and the optimization of inflation and expansion of the crown part of the tire.
When the elongation of the cord structure is less than 1.5%, the total elongation of the inner zero-degree belt layer exceeds the elongation of the cord structure in consideration of the stretching in the high zero-degree belt processing process, so that the problem of uneven tire inner easily occurs; when the elongation of the cord structure is more than 2.2 percent, the total elongation of the outer zero-degree belt ply is insufficient, and uneven inflation expansion is easy to occur on the driving surface.
When the vulcanization shaping elongation of the zero-degree belt is less than 0.8%, the total elongation of the outer zero-degree belt layer is insufficient, and uneven inflation expansion of a driving surface is easy to occur; when the vulcanization shaping elongation of the zero-degree belt is more than 1.3 percent, the total elongation of the inner zero-degree belt layer exceeds the elongation of the cord structure of the high-zero-degree belt layer in consideration of the stretching in the processing process of the high-zero-degree belt, so that the problem of uneven tire inner surface is easily caused.
The invention aims to uniformize the elongation of vulcanization shaping at the zero-degree belt position through design adjustment of a belt layer of the tire, optimize inflation expansion of a crown part of the tire, further improve the grounding performance, rolling resistance performance and durability of the tire, and improve the anti-ditch crack performance without damage.
The invention can homogenize the stretching rate of the vulcanization molding of the zero-degree belt at the position without transforming the molding equipment, optimize the inflation expansion of the crown part of the tire, further improve the grounding performance, the rolling resistance performance and the durability of the tire, improve the performance of resisting the cracking of the side ditch without damage, and simultaneously increase the degree of freedom of the design of the tire.
Drawings
FIG. 1 is a radial cross-sectional view of a tire of an embodiment of the present invention;
FIG. 2 is an enlarged view of the bead portion A shown in FIG. 1;
FIG. 3 is a radially exploded cross-sectional view of a tire in accordance with an embodiment of the present invention;
in the figure, 100, four layers of belt layers; 200. a crown; 201. a trench; 300. a carcass;
1. 1# belt layer; 2. a No. 2 belt layer; 3. 3# belted layer; 4. a zero degree belt ply; 5. a primary ply; 6. film.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.
In the present application, the direction or positional relationship indicated by "inner" is a side closer to the geometric center of the tire based on the drawings, and the direction or positional relationship indicated by "outer" is a side away from the geometric center of the tire based on the drawings.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
When the term "radial" is used, the expression relates to the radial direction of the tyre, if closer to the rotation axis of the tyre, the expression "radially inside"; when the term "circumferential" is used, it is expressed as the tire rolling direction; when the term "inner" is used, it is stated that the tire is on the side near the geometric center of the tire.
When the term "tire shoulder" or "shoulder" is used, it is stated that the tire surface has a curvature in the axial direction, and the end positions of the tire lower on both sides of the tire surface at the curvature of the tire surface are the "tire shoulder" or "shoulder".
The following is a description of preferred embodiments of the present invention with reference to the accompanying drawings.
As shown in fig. 1, a tire of the present invention includes: the tyre comprises a tyre crown 200, a tyre body 300 and four layers of belted layers, wherein the four layers of belted layers are arranged between the tyre crown 200 and the tyre body 300, and a plurality of inwards concave grooves 201 are formed in the outer surface of the tyre crown 200 along the circumferential direction of the tyre and are used for preventing the tyre from skidding and increasing the ground gripping force of the tyre.
As shown in fig. 2 and 3, the four-layered belt layer includes: the tire comprises a 1# belt layer 1, a 2# belt layer 2 and a 3# belt layer 3 which are arranged in the middle of a tire crown 200 of a tire, and two zero-degree belt layers 4 which are symmetrically arranged on the shoulder portions of the tire, wherein the 1# belt layer 1 is attached to a tire body 300, a main curtain layer 5 is arranged between the 1# belt layer and the tire body 300, the 1# belt layer 1, the 2# belt layer 2 and the 3# belt layer 3 are sequentially attached and connected from the tire body 300 to the direction of the tire crown 200 in the middle of the tire crown 200 along the radial direction, the 2# belt layer 2 is attached to the upper end face of the 1# belt layer 1, the width of the 2# belt layer 2 is larger than that of the 1# belt layer 1, the 3# belt layer 3 is arranged on the 2# belt layer 2, the width of the 3# belt layer 3 is smaller than that of the 2# belt layer 2, the zero-degree belt layers 4 are all circumferentially wound along the shoulder portions, and the zero, the zero-degree belted layer 4 is connected with the 2# belted layer in a pressing mode, and the zero-degree belted layer 4 is arranged at two axial ends of the 3# belted layer 3.
In an embodiment of the present invention, two tire shoulders of the tire may be provided with one zero-degree belt 4 or two zero-degree belt 4 layers arranged in sequence from inside to outside along the radial direction.
It should be noted that, three belted layers are arranged in the middle of the tire crown, the tire shoulder is provided with the zero belted layer 4, the zero belted layer 4 can improve the strength of the tire shoulder, the problems of shoulder hollowness and tire burst can be avoided, and the tire tread is flat.
As shown in fig. 1, both ends of the # 2 belt layer 2 extend to the shoulder points of the tire, respectively, and both ends of the # 2 belt layer 2 are aligned with the vertical line of the main ply 5.
It should be noted that the 2# belt 2 has the largest axial width, so that the 1# belt 1 and the 3# belt 3 can be better displaced to suppress heat generation and reinforce the tire, and at the same time, the following 1# belt 1 and the carcass 300 can be protected to prevent damage to the following belt.
As shown in FIG. 3, the edge of the No. 1 belt layer 1 is covered with a rubber sheet 6, and the rubber sheet 6 is used to adjust the elongation of the vulcanization setting at the zero-degree belt position.
The 1# belt ply 1 is wrapped at the axial end part, so that the deformation of the axial end part of the tire belt ply can be reduced, the adhesion between layers in the tire belt ply is improved, the shearing action between the layers is reduced, the phenomena of shoulder hollowness, shoulder cracks and the like can be effectively relieved, the durability of the tire is improved, the service life of the tire is prolonged, and the tire is particularly suitable for heavy-duty tires.
This application technical personnel discover, because tire vulcanization mould driving surface has certain radian, under the condition that uses conventional belted layer laminating drum, inboard zero degree belted vulcanization design elongation is naturally higher than the inboard zero degree belted of outside, and this problem can be aggravated in conventional design for it can't obtain even zero degree belted position vulcanization design elongation, and then makes to prevent that the child is uneven and optimize and be difficult to gain balance between the inflation of tire crown 200.
The reason is that:
1. the zero-degree belted cord vulcanization shaping elongation rate is insufficient, the finished zero-degree belted cord has high residual structure elongation, and the performance of the zero-degree belted cord is not fully utilized.
2. The zero-degree belted layer vulcanization shaping expansion rate is insufficient, the inflation expansion of the position of the zero-degree belted layer 4 is obviously higher than that of the crown, and the position is positioned at the bottom of a gutter, so that the risk of the gutter crack is brought.
3. The zero-degree belted layer 4 is not uniformly stretched, and the expansion nonuniformity of the inflatable driving surface is improved.
4. The uniformity of the vulcanization shaping expansion rate of the zero-degree belt is increased, the inflation expansion difference of the crown/zero-degree belt is smaller, the drop amount of the tire shoulder part of the driving surface is relatively reduced, and the inflated driving surface is smoother.
5. The improvement of the vulcanization shaping expansion rate of the inner zero-degree belt, the non-uniformity of the tire impression pressure distribution is increased, and further the loss of the tire rolling resistance is caused.
According to the repeated experiments of the technical personnel of the application, a tire belted layer design structure is designed, as shown in fig. 2, the belted layer structure comprises a 1# belted layer 1, a 2# belted layer 2, a 3# belted layer 3 and a zero-degree belted layer 4, the 1# belted layer 1, the 2# belted layer 2 and the 3# belted layer 3 are sequentially connected with the two axial ends of the 3# belted layer 3 in a pressing mode from inside to outside along the tire radial direction, the zero-degree belted layer 4 is respectively paved on the two axial ends of the 3# belted layer 3, the zero-degree belted layer 4 is connected with the 2# belted layer 2 in a pressing mode, and the axial end point of the 2# belted layer 2 protrudes out of the 1# belt.
The distance from the outer end point of the No. 2 belted layer to the outer end point of the No. 1 belted layer is set as A, the distance from the outer end point of the No. 1 belted layer to the zero-degree belted inner end point is set as B, the distance from the outer end point of the No. 2 belted layer to the zero-degree belted outer end point is set as C, and the width of the zero-degree belted layer 4 is set as D;
wherein A is more than or equal to 20MM and less than or equal to 25MM, C is more than or equal to 8MM and less than or equal to 12MM, D is more than or equal to 25MM and less than or equal to 34MM, and the ratio of B to D satisfies the following conditions: B/D is more than or equal to 0.5 and less than or equal to 0.66.
According to one embodiment of the invention, as shown in fig. 2, the outer surface of the tire crown 200 is provided with a plurality of grooves 201 which are inwards sunken along the axial direction of the tire, and the groove bottoms of the grooves 201 to the zero-degree belt inner end points are not less than 5MM, so that the anti-edge-groove-crack performance is improved.
According to an embodiment of the invention, as shown in fig. 2, the edge of the 1# belt ply 1 uses a rubber sheet 6 with the thickness of 0.6-0.8 MM and the width of 20-30 MM for edge covering, and because the edge of the 1# belt ply 1 for edge covering is positioned at the inner side of the zero-degree belt ply, the joint diameter of the zero-degree belt ply can be increased when the belt ply is jointed, and further the vulcanization shaping elongation of the inner zero-degree belt ply is reduced. Because the outside position of zero degree area restraints staggers with 1# area and restraints layer 1 rubber piece 6 of borduring, reduce zero degree area and restraint laminating diameter than conventional product, and then improve outside zero degree area and restraint vulcanization design elongation. The embodiment can obtain more uniform zero-degree belt vulcanization setting elongation than the conventional product.
In the 1# belt 1 of the belt of the examples, a film 6 having a thickness of 0.6 to 0.8MM and a width of 20 to 30MM was used for edge wrapping. When the relation is met, the tire can obtain uniform zero-degree belt harness position vulcanization shaping elongation and has enough manufacturability, and when the thickness of the rubber sheet 6 is more than 0.8MM, the belt harness layer has air pocket phenomenon in the laminating process, so that the production manufacturability requirement is difficult to meet; when the thickness of the rubber sheet 6 is less than 0.6MM, it is difficult to obtain uniform vulcanization setting elongation at the zero belt position.
In one embodiment of the present invention, as shown in FIG. 2, the zero degree belt is provided as a high elongation cord structure having an elongation in the range of 1.5% to 2.2%; the range of the vulcanization shaping elongation of the zero-degree belt is 0.8-1.3%, the more uniform vulcanization shaping elongation of the zero-degree belt not only improves the rolling resistance, but also obviously improves the durability of the tire compared with a comparative example.
The zero degree belt of the belt layer of the embodiment adopts a high elongation cord, the structural elongation of the cord is 1.5 to 2.2 percent, and the vulcanization setting elongation of the zero degree belt is kept between 0.8 and 1.3 percent. When the above relationship is satisfied, the zero degree belt provides a balance between preventing the tire cavity from becoming uneven and optimizing inflation of the crown 200 portion of the tire.
When the elongation of the cord structure is less than 1.5%, the total elongation of the inner zero-degree belt ply 4 exceeds the elongation of the cord structure in consideration of the stretching in the high zero-degree belt processing process, so that the problem of uneven tire inner easily occurs; when the elongation of the cord structure is more than 2.2 percent, the total elongation of the outer zero-degree belt layer 4 is insufficient, and uneven inflation expansion is easy to occur on the driving surface.
When the vulcanization shaping elongation of the zero-degree belt is less than 0.8%, the total elongation of the outer zero-degree belt layer 4 is insufficient, and uneven inflation expansion of a driving surface is easy to occur; when the vulcanization shaping elongation of the zero-degree belt is more than 1.3%, the total elongation of the inner zero-degree belt layer 4 exceeds the elongation of the cord structure thereof in consideration of the stretching in the processing process of the high-zero-degree belt, so that the problem of uneven tire inside is easily caused.
In one embodiment of the present application, during the tire manufacturing process, the following steps are included:
s1: normally attaching a main curtain fabric layer 5 on a belt layer attaching drum of a forming machine, then attaching a 1# belt layer 1 on the main curtain fabric layer 5, winding rubber sheets 6 at two ends of the 1# belt layer 1, and respectively overlapping the rubber sheets 6 at two axial ends of the 1# belt layer 1 with the main curtain fabric layer 5.
S2, normally attaching the 2# belt layer 2 and the 3# belt layer 3 on the 1# belt layer 1, and respectively winding two zero-degree belt layers 4 at two ends of the 3# belt layer 3;
s3: the main ply 5 is turned over so that the main ply 5 wraps the axial ends of the 1# belt 1, the 2# belt 2 and the zero-degree belt 4, and the main ply 5 is overlapped with the zero-degree belt 4.
It should be noted that the widths and angles of the four belt layers are different, and each belt layer has different functions. After the belt layers are provided, other components such as the crown 200 are applied.
The invention discloses a tire belt design, which consists of a 1# belt layer 1, a 2# belt layer 2, a 3# belt layer 3 and a zero-degree belt layer 4. Under the condition that forming equipment is not transformed, the stretching rate of vulcanization forming of the zero-degree belted position can be uniformized by the design of the belted layer, the inflation expansion of the tire crown 200 part is optimized, the grounding performance, rolling resistance performance and durability of the tire are further improved, the anti-edge-groove-cracking performance is improved, and meanwhile, the degree of freedom of tire design is increased.
According to a first concept of the present application, the inventive # 2 belt extends to a shoulder point on a vertical line to the main ply of the tire; the distance c from the No. 2 belted layer to the zero-degree belted outer end point is 8-12 mm; the distance a from the No. 2 belted layer to the No. 1 belted layer is 20-25 mm; the 1# belt to zero degree belt inner end point distance b and the zero degree belt width d should satisfy the following relationship: b/d is more than or equal to 0.5 and less than or equal to 0.66; the width d of the zero-degree belt ply is 25-34 mm; the distance e from the pattern groove bottom to the zero-degree belt inner end point is not less than 5 mm.
According to the second concept of the present application, the zero-degree belt uses a high elongation cord, and the elongation of the zero-degree belt vulcanization setting is maintained at 0.8% to 1.3%.
According to the third concept of the application, the 1# belt ply edge uses a film with the thickness of 0.6-0.8 mm and the width of 20-30 mm for edge covering, the stretching rate of the zero-degree belt ply position vulcanization shaping is adjusted by adjusting the film, and when the relation is met, the tire can obtain the uniform zero-degree belt ply position vulcanization shaping stretching rate and has enough manufacturability.
The product of the invention can better inhibit the deformation of the tire and run at higher speed through tire indoor machine tool experiments and external road surface tests. The product of the invention is easy to realize, can be produced without changing the existing tool, is suitable for all heavy-duty tires, is particularly suitable for wheeled vehicles with high bearing capacity and high-speed running, and can be well popularized and utilized.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (9)
1. A tire, comprising: a crown, a carcass, and four belts disposed between the crown and the carcass;
the four-ply belt layer includes: the tire comprises a 1# belt ply, a 2# belt ply, a 3# belt ply and two zero-degree belt plies, wherein the 1# belt ply, the 2# belt ply and the 3# belt ply are arranged in the middle of a tire crown of the tire;
the 1# belt ply, the 2# belt ply and the 3# belt ply are sequentially attached and connected from the tire body to the tire crown direction along the radial direction in the middle of the tire crown;
the zero-degree belted layer is connected with the No. 2 belted layer in a laminating mode, and the zero-degree belted layer is arranged at two axial ends of the No. 3 belted layer.
2. The tire of claim 1, wherein the # 1 belt is disposed on the carcass with a main ply disposed therebetween, the # 2 belt is disposed on the # 1 belt upper end face, and the width of the # 2 belt is greater than the width of the # 1 belt, the # 3 belt is disposed on the # 2 belt, and the width of the # 3 belt is less than the width of the # 3 belt;
two tire shoulders of tire all are provided with the one deck zero degree area is restrainted the layer or radially sets gradually from inside to outside two-layer zero degree area is restrainted the layer, zero degree area is restrainted the layer and is all followed tire shoulder circumference encircles, 3# is restrainted the layer and two tire shoulder zero degree area is restrainted the layer and all is laid in the surface of 2# area and is restrainted the layer.
3. The tire of claim 1 wherein said 1# belt edge is hemmed with a film that is utilized to adjust the stretch of said zero degree belt position cure profile.
4. The tire of claim 1 wherein said # 2 belt ends each extend to a shoulder point of said tire, said # 2 belt ends being aligned with a vertical line of said primary ply.
5. The tire of claim 1, wherein said zero degree belt is provided as a high elongation cord.
6. The tire of claim 1 wherein said outer crown surface is provided with a plurality of inwardly recessed grooves in the circumferential direction of said tire, the bottoms of said grooves being no less than 5mm from said zero degree belt inner end.
7. The utility model provides a tire belted layer design structure, includes 1# belted layer, 2# belted layer, 3# belted layer and zero degree belted layer, 1# belted layer, 2# belted layer and 3# belted layer along the child radial from inside to outside in proper order the pressfitting connection zero degree belted layer has been laid respectively to the axial both ends of 3# belted layer, zero degree belted layer with 2# belted layer laminating is connected, the axial extreme point of 2# belted layer along deviating from the direction of the center of tire all outstanding in 1# belted layer with zero degree belted layer.
Characterized by being applied to a tyre according to claims 1 to 5;
the distance from the outer end point of the No. 2 belt ply to the outer end point of the No. 1 belt ply is set as a, the distance from the outer end point of the No. 1 belt ply to the inner end point of the zero-degree belt ply is set as b, the distance from the outer end point of the No. 2 belt ply to the outer end point of the zero-degree belt ply is set as c, and the width of the zero-degree belt ply is set as d;
wherein a is more than or equal to 20mm and less than or equal to 25mm, c is more than or equal to 8mm and less than or equal to 12mm, d is more than or equal to 25mm and less than or equal to 34mm, and the ratio of b to d satisfies the following conditions: b/d is more than or equal to 0.5 and less than or equal to 0.66.
8. The tire of claim 7, wherein the No. 1 belt edge is hemmed using a film having a thickness of 0.6 to 0.8mm and a width of 20 to 30 mm.
9. The tire of claim 7, said zero degree belt being provided as a high elongation cord structure, wherein said cord structure has an elongation in the range of 1.5% to 2.2%; the range of the zero-degree belt vulcanization shaping elongation is 0.8% -1.3%.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010790954.2A CN112078306A (en) | 2020-08-07 | 2020-08-07 | Tire and belted layer design structure |
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| CN202010790954.2A CN112078306A (en) | 2020-08-07 | 2020-08-07 | Tire and belted layer design structure |
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| CN112078306A true CN112078306A (en) | 2020-12-15 |
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| CN112848807A (en) * | 2021-01-29 | 2021-05-28 | 山东玲珑轮胎股份有限公司 | Curved surface laminating drum design method and curved surface laminating drum |
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Application publication date: 20201215 |