CN110194028B

CN110194028B - UHP tyre with steel wire carcass and manufacturing process thereof

Info

Publication number: CN110194028B
Application number: CN201910560707.0A
Authority: CN
Inventors: 徐伟; 王君; 刘杰; 李勇; 戚顺青; 刘继发; 任振兴; 张晨曦; 唐效蕾; 张琳; 王伟; 邢正涛; 赵翔; 李园园; 赵玉娜; 梁垂燕
Original assignee: Qingdao Doublestar Tire Industry Co Ltd
Current assignee: Qingdao Doublestar Tire Industry Co Ltd
Priority date: 2019-06-26
Filing date: 2019-06-26
Publication date: 2023-06-06
Anticipated expiration: 2039-06-26
Also published as: CN110194028A

Abstract

The invention discloses a steel wire carcass UHP tire and a manufacturing process thereof, belonging to the field of steel wire carcass tires. The UHP tire with steel wire tyre body comprises a tyre crown arranged on the outer side of the upper part, a tyre shoulder connected with the tyre crown, a tyre side connected with the tyre shoulder, a tyre bead connected with the lower part of the tyre side, and a tyre body arranged on the inner side of the tyre section, wherein the tyre body comprises a tyre body cord, the tyre body cord is made of a single-layer steel wire cord, the steel wire cord comprises a plurality of steel wires, the strength index of the tyre body cord is 30000-50000N/dm, the breaking force of the steel wire cord is 350-850N, and the bending rigidity of the steel wire cord is 70Nmm ² ‑130Nmm ² The diameter of the steel wire cord is between 0.5mm and 0.8mm, and the diameter of the steel wire is less than 0.3mm. The invention solves the problems that the prior art can not solve the problems of seam allowance void and stress concentration when the steel wire is used for the tire carcass and can not realize the industrial production of the tire with the steel wire carcass, and the product has the characteristics of high strength, good operability and comfort performance, small rolling resistance, good durability and industrialized production.

Description

UHP tyre with steel wire carcass and manufacturing process thereof

Technical Field

The invention belongs to the field of steel wire carcass tires, and particularly relates to a steel wire carcass UHP tire and a manufacturing process thereof.

Background

UHP tires, colloquially referred to as high performance tires, are primarily tires having a tire aspect ratio of less than 55 series, and speed levels of V and above. Currently, carcass materials such as polyester fiber, nylon, rayon, aramid and the like are commonly used in UHP tire carcass structures, which provide superior handling of the tire. However, the UHP tire sidewall has low height and poor comfort, and meanwhile, the existing UHP tire sidewall only has one or two layers of carcass ply as a support, so that the tire has weak impact resistance and is easy to generate the problem of collision bulge.

Chinese patent CN201610951286 discloses an all-steel mud tire, which replaces the three layers of nylon or polyester materials of the existing mud tire with a layer of steel cord, improving the strength, impact resistance and durability of the tire.

However, when the steel wire is used for tire carcass materials, the problems of seam allowance void and stress concentration are easily caused due to the problems of high bending rigidity and high rebound resilience of the steel wire, and the service life of the tire is affected.

Disclosure of Invention

Aiming at the defects existing in the prior art, the technical problem to be solved by the invention is that the prior art cannot solve the problems of seam allowance void and stress concentration existing when the steel wire is used for a tire carcass and cannot realize the industrial production of the tire with the steel wire carcass, and the steel wire carcass UHP tire and the manufacturing process thereof are provided with high strength, good operability, good comfort performance, small rolling resistance, good durability and industrial production.

In order to solve the technical problems, the invention adopts the following technical scheme:

the invention provides a steel wire carcass UHP tire, the longitudinal section of the tire comprises a crown positioned at the outer side of the upper part, a tire shoulder connected with the crown, a tire side connected with the tire shoulder, a tire bead connected with the lower part of the tire side, and a tire body positioned at the inner side of the section of the tire, the tire body comprises a tire body cord fabric, the tire body cord fabric is made of single-layer steel cord, the steel cord comprises a plurality of steel wires, the strength index of the tire body cord fabric is 30000-50000N/dm, the breaking force of the steel cord is 350-850N, and the bending rigidity of the steel cord is 70Nmm ² -130Nmm ² The diameter of the steel wire cord is between 0.5mm and 0.8mm, and the diameter of the steel wire is smaller than 0.3mm.

Preferably, the tire bead comprises a bead ring, a bead ring is coated with a bead ring, the bead ring extends from a bead ring lower end point to a bead ring upper end point along a radial direction, the tire body bypasses the bottom of the bead ring and turns over to a tire side and then extends to a tire body turn-up end point along a radial direction, a tackifying film is arranged between the tire body and the bead ring, and the tire body turn-up end point is connected with the bead ring through the tackifying film.

Preferably, the tackifying sheet comprises an inner end point of the tackifying sheet positioned at the inner side of the triangular glue and an outer end point of the tackifying sheet positioned at the outer side of the triangular glue, wherein the radial height of the inner end point of the tackifying sheet is higher than that of the outer end point of the triangular glue, the radial distance between the inner end point of the tackifying sheet and the lower end point of the triangular glue is not less than 5mm, and the radial distance between the inner end point of the tackifying sheet and the outer end point of the triangular glue is not less than 10mm; the radial height of the outer side end point of the tackifying sheet is not lower than that of the carcass turn-up end point.

Preferably, a reinforcing layer is arranged between the tire body and the tire side, the lower end of the reinforcing layer is positioned at a lower positioning point of the reinforcing layer, the upper end of the reinforcing layer is positioned at an upper positioning point of the reinforcing layer, and the tire body anti-wrapping end point is positioned between the lower positioning point of the reinforcing layer and the upper positioning point of the reinforcing layer along the radial direction; the radial distance between the locating point below the reinforcing layer and the carcass turn-up end point is 10-20mm; the radial height of the locating point on the reinforcing layer is higher than the radial height of the endpoint of the triangular glue, and the radial distance between the locating point on the reinforcing layer and the endpoint of the triangular glue is greater than 10mm; the reinforcing layer makes an angle of 0-55 degrees with the circumference of the tire.

Preferably, the radial height of the end point on the triangular glue is higher than the radial height of the end point of the carcass turn-up, the radial distance between the end point on the triangular glue and the end point of the carcass turn-up is greater than 10mm, the thickness of the triangular glue at the joint of the end point on the triangular glue and the end point of the carcass turn-up is not less than 2mm, and the thickness of the tackifying film is 0.5-2mm.

Preferably, the tire further comprises a rim protection lower end point positioned on the sidewall and connected with the rim, and the radial distance between the tire body turnup end point and the rim protection lower end point is smaller than 15mm.

Preferably, the radial height of the end point on the apex is lower than the radial height of the end point of the carcass turnup, the radial distance between the end point on the apex and the end point of the carcass turnup is greater than 10mm, and the thickness of the tackifying film is 1.0-4.0mm.

Preferably, the distance between the inner surfaces of the carcass at both sides of the bead ring and the carcass turn-up end point is 2.0-5.0mm; the distance between the outer surface of the carcass located outside the bead ring and the outer surface of the sidewall at the carcass turn-up end is 2.5-10mm.

The invention also provides a manufacturing process for the steel wire carcass UHP tyre according to any one of the technical schemes, comprising a cutting process and a forming process,

The cutting process comprises opening, cutting and jointing;

the cutting includes: the cloth presser presses the wirecord fabric, and then the rectangular knife cuts the wirecord fabric; the rectangular knife comprises an upper rectangular cutting knife and a lower rectangular cutting knife; the rectangular knife surface is an alloy knife surface; the Rockwell hardness of the rectangular knife surface is HRC28-HRC45; the horizontal clearance between the upper rectangular cutter and the lower rectangular cutter is smaller than 1.5 wires;

the joint includes: the cut wirecord fabric is adsorbed by a magnet clamp to turn, and is conveyed to a splicing device to be spliced; the gap between the feeding and the delivering is adjusted to 1.5-2.5mm, and the sewing pressure of the upper connector and the lower connector is adjusted to 0.15-0.25Mpa;

the forming process comprises the following steps: attaching, buckling rings, presetting, reversely wrapping a carcass and unloading the carcass;

the lamination comprises PA component lamination, reinforcement layer lamination and steel wire carcass lamination; after the steel wire tire body is attached and the joint is completed, the rear press roller extends to a designated position to compress the steel wire tire body, the tire body drum rotates at the rotating speed of 80+/-10 r/min, the pressure of the rear press roller is kept at 2-2.5bar, and translational rolling is performed outwards according to the transverse speed of 5-15mm/sec, until the rolling at the end point of the tire body is finished.

Preferably, the buckling ring comprises a bead locking block locking buckling ring; after the bead locking block locks the bead, the high pressure of the bead locking block is kept to be more than 5.5 bar;

The pre-shaping includes carcass drum inflation; wherein said carcass drum is inflated at a pressure of 1.1-1.3 bar;

the carcass turnup comprises turnup rod turnup; when the unpacking rod unpacks, the pressure of the unpacking rod is not lower than 3.5bar; and after the package is turned over, the rolling roller swings and rotates to keep the rolling pressure of 2-3bar for rolling.

The invention also provides another manufacturing process for the UHP tire with the steel wire carcass, which comprises a cutting process and a forming process and is characterized in that,

the cutting process comprises opening, cutting and jointing;

the forming process comprises the following steps: the inner liner and the tyre body are attached, the buckling ring, the tyre body is reversely wrapped, the reversely wrapped and pressed, the bead cloth and the tyre side are attached, and the tyre blank is molded;

The lining layer and the carcass lamination comprise lining layer lamination and steel wire carcass lamination; after the steel wire carcass is attached and the joint is completed, the lower pressing roller is lifted to contact with the steel wire carcass, the pressure is kept at 1-2bar, the carcass drum rotates at a speed of 600-800mm/s, and the lower pressing roller translates and rolls from the middle position of the steel wire carcass to the end point of the carcass drum at a speed of 5-30 mm/s.

Preferably, the buckling ring comprises finger-shaped sheet grabbing and buckling ring disc buckling rings; the time for the finger-shaped sheet to grasp the steel wire carcass is 2-4s; when the buckling ring disc buckles the ring, the pause time is 1-2s when the buckling ring disc moves to the appointed position;

the carcass turnup comprises turnup bladder inflation; wherein the counter-encapsulated inflation is specifically counter-encapsulated inflation for 2-4s, and the pressure is kept at 3.5-4.5bar; after the reverse encapsulation bag is stopped for 2-4s after being reversely wrapped in place, the reverse encapsulation bag is deflated;

the reverse wrapping pressing comprises rolling; the rolling is that the lower press roller is raised to contact with the steel wire tyre body and the pressure is kept at 2-3bar, the tyre body drum rotates at 600-800mm/s, and the lower press roller rolls from the end point of the tyre body drum to the anti-wrapping end point of the steel wire tyre body at 10-30 mm/s.

Compared with the prior art, the invention has the beneficial effects that:

1. the invention provides a steel wire carcass UHP tire, which can obviously improve the safety strength of the UHP tire, thereby further reducing the risk of damage of the tire after collision in running;

2. Compared with tires made of other fiber materials, the UHP tire provided by the invention has the advantages that the material cost is lower, the rolling resistance is reduced, the oil consumption is reduced by 2% -4% in hundred kilometers, and the UHP tire is beneficial to low carbon and environmental protection;

3. the invention provides a steel wire matrix UHP tyre, which is made of steel wires instead of other fiber materials, so that the comfort and the control performance are improved in the running process, and the dry braking distance and the noise level are improved;

4. the invention provides a manufacturing process of a steel wire matrix UHP tire, overcomes the defects of the prior art, realizes the industrial production of the steel wire matrix UHP tire, has the comprehensive qualification rate of the product quality reaching 99.6 percent, and greatly improves the production performance.

Drawings

Fig. 1 is a schematic view of the structure of a steel wire carcass UHP tire provided in example 1 of the present invention;

FIG. 2 is a schematic view of the shoulder portion of a UHP tire with a steel wire carcass according to example 1 of the present invention;

FIG. 3 is a schematic view of the bead structure of a steel wire carcass UHP tire provided in example 1 of the present invention;

fig. 4 is a schematic view of the bead structure of a steel wire carcass UHP tire provided with a reinforcing layer according to example 1 of the present invention;

fig. 5 is a schematic view of the bead structure of a steel wire carcass UHP tire provided in example 2 of the present invention;

Fig. 6 is a schematic view of the bead structure of a steel wire carcass UHP tire provided in example 3 of the present invention;

fig. 7 is a partial enlarged view of a bead structure a of a steel wire carcass UHP tire provided in example 3 of the present invention;

FIG. 8 is a schematic diagram of the process flow of forming a UHP tire with a steel wire carcass according to the present invention in examples 4-5;

FIG. 9 is a schematic diagram of the process flow of forming a UHP tire with a steel wire carcass according to the present invention in examples 6-7;

in the above figures: 1. a crown; 2. shoulder; 3. a sidewall; 4. a bead; 41. a bead ring; 42. triangular glue; 421. a lower end point of the triangular glue; 422. the end points of the triangular glue; 43. a tackifying film; 431. an inner end point of the tackifying adhesive sheet; 432. an outer end point of the tackifying adhesive sheet; 44. a reinforcing layer; 441. locating points below the reinforcing layer; 442. positioning points on the reinforcing layer; 45. the rim protects the lower end point; 5. a carcass; 51. carcass turnup end points; 6. an inner liner layer; 7. a belt layer; 8. a crown strap; 9. forming glue; 10. a carcass drum; 11. a reverse wrapping rod; 12. finger-shaped sheets; 13. a buckling ring disk; 14. capsule for reverse packaging; 15. PA component.

Detailed Description

The present invention will be specifically described below by way of exemplary embodiments. It is to be understood that elements, structures, and features of one embodiment may be beneficially incorporated in other embodiments without further recitation.

In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "bottom", "inner", "outer", etc. are based on the directions or positional relationships shown in fig. 1, are merely for convenience of describing the present invention and 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.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "connected," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

Example 1: as shown in FIG. 1, the present invention provides a steel wire carcass UHP tire, the tire longitudinal section comprising a crown 1 located at the upper outer side, a shoulder 2 connected to the crown 1, a sidewall 3 connected to the shoulder 2, a bead 4 connected to the lower portion of the sidewall 3, and a carcass 5 located at the inner side of the tire section, the carcass 5 comprising a carcass ply made of a single layer steel cord, the steel cord comprising a plurality of steel wires, the carcass ply having a strength index of 30000-50000N/dm, the steel cord breaking force of 350-850N, the steel cord having a bending rigidity of 70Nmm ² -130Nmm ² The diameter of the steel wire cord is between 0.5mm and 0.8mm, and the diameter of the steel wire is less than 0.3mm. As shown in fig. 2, the tyre further comprises a belt layer 7, a rubber 9 is arranged between the belt layer 7 and the tyre body 5, and a crown strip 8 is arranged on the inner side of the tyre crown 1.

The steel wire is used as the material of the tire body 5, so that the strength of the tire can be enhanced, the impact resistance of the tire can be improved, and the service life of the tire body 5 can be prolonged. However, because the steel wire has the characteristics of larger bending rigidity and high rebound resilience, the steel wire carcass 5 tire obtained by the existing tire structure and the production process has the problems of high production and manufacturing difficulty, low yield and poor comfort. Therefore, in order to obtain a steel wire carcass UHP tire excellent in performance and capable of realizing industrial production, high in yield, it is required to overcome a number of technical difficulties. In terms of material selection, the selection of breaking force, bending stiffness and strength index of the steel cord is specifically included.

Regarding the breaking force, the breaking force of the steel wire determines the strength of the carcass 5 made of the steel wire, and the higher the breaking force is, theoretically, the higher the load the tire made cannot fail; under the same wire diameter, the breaking force of a general steel wire is about 3-6 times that of polyester, so that if the single-layer steel wire carcass 5 is used on the passenger tire from the breaking force alone, the 1-3-layer polyester carcass 5 can be replaced; because TBR (radial ply-yarn tire) is mainly used for bearing and wearing, and PCR (radial ply-yarn tire) is mainly used for pursuing comfort, control, movement and safety performance, the product performance requirement is ensured as much as possible, and meanwhile, the basic requirement of the product on strength is considered to reduce the breaking force of steel wires; reducing the breaking force means that the wire diameter of the steel cord is required to be thin, because the carbon content of the raw material wire rod of the steel cord is substantially fixed, approximately between 0.6% and 0.9%.

Regarding bending stiffness, the bending stiffness of the steel cord has a relation with the wire diameter and the strand number of the steel wire, and has no direct corresponding relation with the carbon content of the steel wire itself; bending rigidity, namely the difficulty of bending the steel wire, is important for cutting in the cutting process and reverse wrapping in the forming process; the bending rigidity determines the possibility that the steel wire can realize normal mass production in a factory, and the normal mass production of products cannot be realized due to the fact that the bending rigidity is too large or too small.

Regarding the strength index, the strength index in the invention refers to the product of breaking force and rolling density, and different strength indexes can be used for limiting different products, such as HP, UHP, SUV, AT, MT and other series tires; the strength index is too small, the safety performance of the product cannot be ensured, the strength index is too large, the performance is wasted, and the cost is wasted.

In this example, the carcass ply is specifically limited to a strength index of 30000-50000N/dm, a breaking force of 350-850N, and a bending rigidity of 70Nmm ² -130Nmm ² The diameter of the steel wire cord is between 0.5mm and 0.8mm, the diameter of the steel wire is less than 0.3mm, and the comfort, the control, the movement and the safety of the UHP tire of the steel wire carcass are ensured on the premise of improving the strength, the impact resistance and the load carrying performance of the UHP tire of the steel wire carcass Performance properties. The determination of the parameters realizes the material selection standard in the industrial production process of the UHP tire with the steel wire carcass, and has important significance for the industrial production of the UHP tire with the steel wire carcass.

As shown in fig. 3, the bead 4 includes a bead ring 41, a bead ring 42 is coated on the circumference of the bead ring 41, the bead ring 42 extends from a bead ring lower end 421 to a bead ring upper end 422 in the radial direction, a carcass 5 turns around the bottom of the bead ring 41 to a sidewall 3 and then extends to a carcass turn-up end 51 in the radial direction, a tackifying sheet 43 is arranged between the carcass 5 and the bead ring 42, and the carcass turn-up end 51 is connected with the bead ring 42 through the tackifying sheet 43. When the steel wire is used as a material of the tire body 5, the steel wire has the problems of large bending rigidity and high rebound resilience, and meanwhile, the problem of poor viscosity between the tire body 5 and the bead ring 41 is solved, so that the phenomenon of seam allowance void is easily caused, and the quality of the tire is influenced. By arranging the tackifying sheet 43 between the tire body 5 and the apex 42, the difficulty of steel wire rebound is increased, meanwhile, the adhesiveness between the apex 42 and the tire body 5 is increased, the tire has the function of low heat generation and deflection resistance, and the service performance of the tire under complex conditions is improved. It should be noted that, in this embodiment, the carcass turn-up end 51 is further defined to be connected to the apex 42 through the adhesion promoting sheet 43, because the carcass 5 has the problems of large bending rigidity and high rebound resilience when being turned up, if the carcass 5 is directly contacted with the apex 42, the problem of void occurs at the seam allowance position of 2-6h of the carcass under the conditions of constant temperature and constant humidity, which is not beneficial to the storage of the carcass; by adding the tackifying film 43 between the apex 42 and the tire body 5, the storage time of the tire blank is prolonged to 16-20 hours, the storage time of the tire blank is prolonged, the appearance quality of the tire blank is improved, and the problem of seam allowance void is relieved.

In order to further increase the steel wire rebound difficulty and improve the adhesiveness between the apex 42 and the carcass 5, the tackifying sheet 43 comprises an inner end 431 of the tackifying sheet located at the inner side of the apex 42 and an outer end 432 of the tackifying sheet located at the outer side of the apex 42, the radial height of the inner end 431 of the tackifying sheet is higher than the radial height of the outer end 422 of the apex, the radial distance between the inner end 431 of the tackifying sheet and the lower end 421 of the apex is not less than 5mm, and the radial distance between the inner end 431 of the tackifying sheet and the outer end 422 of the apex is not less than 10mm; the radial height of the outer end 432 of the tackifying sheet is not lower than the radial height of the carcass turnup end 51. The arrangement of the outer end point 432 of the tackifying film ensures that the tackifying film 43 is attached to or wrapped on the trimming edge of the carcass 5, is favorable for increasing the rebound difficulty of steel wires and prevents the phenomenon of seam allowance void. In order to ensure dimensional stability of the tackifying film 43 during production and to have a stronger tackifying effect, the tackifying film 43 has a shore hardness of 65-78.

As shown in fig. 4, in order to ensure smooth stress-strain transition at the carcass turn-up end point 51 and improve the durability of the tire, a reinforcing layer 44 is provided between the carcass 5 and the sidewall 3, the lower end of the reinforcing layer 44 is located at a reinforcing layer lower anchor point 441, the upper end of the reinforcing layer 44 is located at a reinforcing layer upper anchor point 442, and the carcass turn-up end point 51 is located between the reinforcing layer lower anchor point 441 and the reinforcing layer upper anchor point 442 in the radial direction; the radial distance between the anchor point 441 under the reinforcing layer and the carcass turn-up end point 51 is 10-20mm; the radial height of the locating point 442 on the reinforcing layer is higher than that of the endpoint 422 on the triangular glue, and the radial distance between the locating point 442 on the reinforcing layer and the endpoint 422 on the triangular glue is greater than 10mm; the reinforcing layer 44 makes an angle of 0-55 deg. with the circumference of the tire. In the tire, if the hardness or stress transition of the product is uneven, damage easily occurs at the uneven transition point, the tire is repeatedly deformed during running, and early damage easily occurs at the uneven stress transition point. The carcass turnup end 51 of the steel wire carcass 5 belongs to a stress concentration point, and the hardness difference between the steel wire and surrounding materials is large, so that the reinforcing layer 44 is required for hardness transition. In addition, the embodiment specifically defines the end point position of the reinforcing layer 44, because the arrangement mode of the end point of the reinforcing layer 44 directly affects whether the reinforcing layer 44 can smooth the key factor of stress-strain transition at the carcass turn-up end point 51, the embodiment specifically defines the end point position of the reinforcing layer 44, on one hand, the scheme is implemented, on the other hand, the scheme is beneficial to tightening the carcass turn-up end point 51, rebound is relieved, the steel wire carcass turn-up end point 51 is wrapped by the reinforcing layer 44, shear stress is reduced, early damage of the tire is prevented, and the service life of the tire is prolonged. As the material of the reinforcing layer 44, a material such as nylon 6, nylon 66, polyester, or steel wire may be used. The present embodiment achieves the realisation of the tyre building process by defining the reinforcing layer 44 at an angle of 0-55 ° to the tyre circumference, since in practical applications, if the angle is 90 °, the turn-up cannot be achieved on a one-shot building machine due to too great circumferential tightening force.

Example 2: as shown in fig. 5, this embodiment provides a steel wire carcass UHP tire, the radial height of the apex 422 is higher than the radial height of the carcass turn-up end 51, the radial distance between the apex 422 and the carcass turn-up end 51 is greater than 10mm, the thickness of the apex 42 at the junction with the carcass turn-up end 51 is not less than 2mm, and the thickness of the tackifying sheet 43 is 0.5-2mm. Considering that the carcass turnup end 51 has large transverse shear force, this embodiment defines the thickness of the apex 422, the carcass turnup end 51, and the apex 42 where the carcass turnup end 51 is connected, avoiding cutting the inner side compound under the action of stress strain. Through the design, the tire for the steel wire carcass 5 can be ensured to avoid the fracture of the triangular rubber 42 under the hard impact under the high-speed running condition, and the running safety of the tire is improved. In order to meet the thickness requirement of the apex 42, the cutting of the inner side rubber material under the stress effect is avoided, and the Shore hardness of the apex 42 is 72-92. In order to avoid premature failure of the seam allowance due to excessive shearing force of the carcass turnup end 51 and the ply, the thickness of the tackifier sheet 43 is limited to 0.5 to 2mm.

Further, the tire further comprises a rim protection lower end point 45 which is positioned on the sidewall 3 and connected with the rim, and the radial distance between the tire body turnup end point 51 and the rim protection lower end point 45 is less than 15mm. The bead 4 structure in the wire carcass UHP tire of this embodiment is a wire carcass UHP tire bead 4 structure for rim protection, and by defining the radial distance between the carcass turnup point 51 and the rim protection lower point 45 to be less than 15mm, the cutting of the outer side compound under the action of stress strain is avoided. Through the design, the inner side of the carcass turn-up end point 51 is ensured to be the triangular rubber 42, the outer side is the composite point of the wear-resistant rubber and the side wall 3 rubber, the transition of stress from hard to soft is beneficial to stress dispersion, and the service life of the tire is prolonged.

Example 3: as shown in fig. 6, this embodiment provides another steel wire carcass UHP tire, the radial height of the apex 422 is lower than the radial height of the carcass turn-up end 51, the radial distance between the apex 422 and the carcass turn-up end 51 is greater than 10mm, and the thickness of the tackifying sheet 43 is 1.0-4.0mm. Considering that the carcass turnup end 51 has large transverse shearing force, this embodiment defines the apex end 422 and the steel wire carcass turnup end 51, avoiding cutting the inner side rubber under the action of stress strain. Through the design, the inner side of the carcass turn-up end point 51 is ensured to be the triangular rubber 42, the outer side is the composite point of the wear-resistant rubber and the side wall 3 rubber, the transition of stress from hard to soft is beneficial to stress dispersion, and the service life of the tire is prolonged. In order to avoid premature failure of the seam due to excessive shearing force of the carcass turnup end 51 and the ply, the thickness of the tackifier sheet 43 is limited to 1.0 to 4.0mm.

As shown in fig. 7, the distance between the inner surfaces of the carcass 5 located on both sides of the bead ring 41 at the carcass turn-up end 51 is 2.0 to 5.0mm; the distance between the outer surface of the carcass 5 outside the bead ring 41 and the outer surface of the sidewall 3 at the carcass turn-up end 51 is 2.5-10mm. The distance between the inner surfaces of the carcass 5 on both sides of the bead ring 41 at the carcass turnup end 51 is d in the figure ₁ The distance shown is d in the figure between the outer surface of the carcass 5 outside the bead ring 41 and the outer surface of the sidewall 3 at the carcass turn-up end 51 ₂ The distance represented.

Example 4: as shown in fig. 8, the present invention also provides a process for manufacturing a wire carcass UHP tire, as described in any of the above embodiments, including a cutting process and a shaping process,

the cutting process comprises opening, cutting and jointing;

the forming process comprises the following steps: attaching, buckling rings, presetting, reversely wrapping and unloading the tyre body 5;

the lamination comprises lamination of the PA component 15, lamination of the reinforcing layer 44 and lamination of the steel wire carcass 5; after the steel wire tire body 5 is attached and the joint is completed, the rear press roller extends to a designated position to press the steel wire tire body 5, the tire body drum 10 rotates at the rotating speed of 80+/-10 r/min, the pressure of the rear press roller is kept at 2-2.5bar, and translational rolling is performed outwards according to the transverse speed which is set to be 5-15mm/sec until the rolling at the end point of the tire body 5 is finished.

The cutting procedure is realized by mutually shearing the steel cords of the upper guillotine and the lower guillotine (similar to scissors), the diameter of the steel wire is thicker, and the rigidity of the steel wire is high, so that the cutting is facilitated; conversely, it is difficult; the requirements of different procedures on the steel cord are different during the molding, firstly, when the carcass 5 is connected, the carcass 5 is connected through a special carcass 5 stitching instrument (similar to a zipper); the thicker the wire diameter of the steel cord, the larger the rigidity, the easier the joint, otherwise, the difficult the joint; the process is consistent with the requirement of cutting on the steel wire; secondly, the requirements of the turn-up process on the wire diameter and the rigidity of the steel wire are opposite, the thicker the wire diameter is, the larger the rigidity is, the higher the bending rigidity is, the more difficult the turn-up is, and meanwhile, after the turn-up, the rebound resilience of the steel wire can cause delamination of the steel wire carcass 5, the triangular glue 42 and other parts to form defective products; the thinner the wire diameter is, the smaller the rigidity is, the lower the bending rigidity is, the easier the reverse wrapping is, the longer the storage period of the embryo is, and the stability of the quality of the molded embryo is facilitated.

The requirements on the steel cord in the cutting process, the carcass 5 joint process and the turn-up process are integrated, and in order to improve the overall performance of tire molding, the wire diameter of the carcass 5 steel cord selected in the embodiment is below 0.8 mm; the steel cord of the carcass 5 is difficult to cut and has low production stability, and automatic production is difficult to realize, but if the steel cord with the wire diameter of more than 0.8mm is used as the carcass 5, the production cost is high, the reverse wrapping is difficult, the product performance is excessive, and meanwhile, the fatigue and the comfort are poor due to the high rigidity of the steel cord, so that the performance of the PCR product is affected.

The wire diameter of the wire cord is below 0.8 mm; the embodiment provides a cutting process of a steel wire cord fabric with the wire diameter below 0.8mm, when the steel wire cord fabric formed by the steel wire cord fabric with the wire diameter below 0.8mm is cut, a rectangular cutter with the Rockwell hardness of the cutter face of HRC28-HRC45 is selected for cutting, so that the smoothness of a cut is effectively ensured; preferably, the rectangular knife is a titanium alloy cutter with Rockwell hardness HRC 30. The reason for selecting the titanium alloy cutter is that: the titanium alloy has high strength, the tensile strength is 686-1176MPa, and the density is only about 60% of steel; the hardness is higher; the elastic modulus is low, which is about half of that of a common steel knife; the titanium alloy cutter has the following outstanding advantages when applied to cutting wirecord fabric: the deformation coefficient is small, the deformation coefficient is smaller than or close to 1, the sliding friction of the steel wire on the cutter surface is greatly increased, and the cutting effect is enhanced; the shearing force on the unit area is large, and the shearing force on the unit contact area is greatly increased due to the extremely short contact length of the steel wire and the cutter surface, so that the cutting quality is ensured. In addition, when cutting is performed in the embodiment, the horizontal clearance between the upper rectangular cutting knife and the lower rectangular cutting knife is smaller than 1.5 wires; the horizontal gap between the upper rectangular cutting knife and the lower rectangular cutting knife is controlled, so that the shearing force of the curtain cloth in unit area can be increased, smooth cutting of the steel wire curtain wires is ensured, and the notch is smooth; so as to avoid the phenomenon of cutting burrs of the curtain cloth and affecting the quality of products. Furthermore, when in joint, the gap between feeding and delivering is adjusted to 1.5-2.5mm, and the sewing pressure of the upper joint device and the lower joint device is adjusted to 0.15-0.25Mpa; the control of the clearance between the feeding and the delivering during the joint can effectively control the joint quality, avoid the occurrence of the problem of thin wires and wire doubling, and influence the dynamic balance and uniformity qualification rate of the product. The control of the stitching pressure ensures that the joints of the steel cord are stitched smoothly, and the steel cord at the joints are arranged uniformly, so that the quality problems of thin threads, doubling and the like are avoided.

At present, two forms of reverse wrapping are adopted for the reverse wrapping of the forming machine, one form is that a reverse wrapping rod 11 is adopted for reverse wrapping, and when the reverse wrapping rod 11 is used for reverse wrapping, the reverse wrapping is not tight due to gaps between the reverse wrapping rods 11, but the reverse wrapping pressure is large; therefore, the problems of rebound of the steel wire and blank opening are easy to occur, and the storage period of the embryo is short.

In this embodiment, as shown in fig. 8, the molding process includes: attaching, buckling rings, presetting, reversely wrapping and unloading the tyre body 5; wherein the attaching comprises attaching the PA component 15, attaching the reinforcing layer 44 and attaching the steel wire carcass 5; the PA component 15 is an innerliner sidewall 3 composite. After the steel wire carcass 5 is attached and the joint is completed, a rolling step is added; when the rear press roller rolls the steel wire carcass 5, the carcass drum 10 rotates at a rotating speed of 80+/-10 r/min, the pressure of the rear press roller 9 is kept at 2-2.5bar, and translational rolling is performed outwards according to a set transverse speed of 5-15 mm/sec; the rolling step and the rolling parameter setting can effectively exhaust the gas between the tyre body 5 and the airtight layer, the bubble rate of the tyre blank is reduced by more than 85%, the labor intensity of manually puncturing and repairing the tyre blank is greatly reduced, and the appearance quality of the tyre blank is greatly improved.

Wherein, when the PA component 15 is jointed, the reinforcing layer 44 is jointed and the steel wire carcass 5 is jointed, the carcass drum 10 rotates by an angle every jointing one component, thereby the joints of the components are in a staggered mode, on one hand, the overall strength of the tire is improved, and on the other hand, the gravity distribution of the tire is balanced.

Further, the buckling ring comprises a bead locking block locking buckling ring; after the bead locking block locks the bead 4, the high pressure of the bead locking block is kept above 5.5 bar;

the pre-shaping comprises inflation of the carcass drum 10; wherein the carcass drum 10 is inflated at a pressure of 1.1-1.3 bar;

the reverse wrapping of the carcass 5 comprises the reverse wrapping of a reverse wrapping rod 11; when the turnup rod 11 turnup, the pressure of the turnup rod 11 is not lower than 3.5bar; and after the package is turned over, the rolling roller swings and rotates to keep the rolling pressure of 2-3bar for rolling.

In order to further avoid the problems of short storage period of the embryo, rebound of the steel wire and empty seam allowance, the embodiment carries out the following restrictions on the buckling ring, the pre-shaping and the reverse wrapping process of the carcass 5. In this embodiment, after the tire bead 4 is locked by the tire bead locking block during the buckling of the ring, the high pressure of the tire bead locking block is kept to be more than 5.5bar, the tire bead 4 can be effectively and accurately positioned, the tire bead 4 is not easy to shift during the forming, and meanwhile, the tire bead 4 and the steel wire tire body are tightly attached to each other at the seam allowance through the adhesion effect of the tackifying piece.

The carcass drum 10 is inflated at a pressure of 1.1-1.3bar during the pre-shaping to effectively ensure complete contact of the composite with the steel cords of the carcass 5 and tight connection; thereby improving the bonding strength of the carcass 5. Because the steel wire is strong relative to materials such as polyester, the rigidity is strong, and the increase preshaping pressure can guarantee that matrix 5 cord fully stretches before contacting with the complex, avoids because of insufficient stretching causes matrix cord crooked, forms unqualified product. In addition, the carcass drum 10 is inflated for 2-5s at the time of the pre-shaping to stabilize the inflation effect.

When the carcass 5 is reversely wrapped, the anti-wrapping rod 11 can effectively realize the anti-wrapping of the steel wire carcass ply at the pressure of not lower than 3.5bar, so that the problems of non-real anti-wrapping, blank mouth and the like in the initial anti-wrapping process are avoided; at the same time, the interface element is given a certain pre-load force, providing good rolling conditions for the subsequent rolling. In addition, after the turn-up is finished, the swing press roller rolls under the condition of rolling pressure of 2-3bar from the bottom of the seam allowance to the end point of the side wall 3, so that the turn-up quality is improved.

Example 5: as shown in fig. 9, the present invention also provides a process for manufacturing a wire carcass UHP tire, as described in any of the above embodiments, including a cutting process and a shaping process,

the cutting process comprises opening, cutting and jointing;

The forming process comprises the following steps: the inner liner 6 is attached to the tire body 5, the buckling ring, the tire body 5 is reversely wrapped, the reversely wrapped and pressed, the bead cloth and the tire side 3 are attached, and the tire blank is molded;

the bonding of the inner liner 6 and the carcass 5 comprises bonding of the inner liner 6 and bonding of the steel wire carcass 5; wherein after the steel wire carcass 5 is attached and the joint is completed, a lower pressing roller is lifted to contact with the steel wire carcass 5, the pressure is kept at 1-2bar, the carcass drum 10 rotates at a speed of 600-800mm/s, and translational rolling is carried out from the middle position of the steel wire carcass 5 to the end point of the carcass drum 10 at a speed of 5-30 mm/s.

The wire diameter of the wire cord is below 0.8 mm; the embodiment provides a cutting process of a steel wire cord fabric with the wire diameter of less than 0.8mm, when the steel wire cord fabric formed by the steel wire cord fabric with the wire diameter of 0.8mm is cut, a rectangular cutter with the Rockwell hardness of the cutter face of HRC28-HRC45 is selected for cutting, so that the smoothness of a cut is effectively ensured; preferably, the rectangular knife is a titanium alloy cutter with Rockwell hardness HRC 30. The reason for selecting the titanium alloy cutter is that: the titanium alloy has high strength, the tensile strength is 686-1176MPa, and the density is only about 60% of steel; the hardness is higher; the elastic modulus is low, which is about half of that of a common steel knife; the titanium alloy cutter has the following outstanding advantages when applied to cutting wirecord fabric: the deformation coefficient is small, the deformation coefficient is smaller than or close to 1, the sliding friction of the steel wire on the cutter surface is greatly increased, and the cutting effect is enhanced; the shearing force on the unit area is large, and the shearing force on the unit contact area is greatly increased due to the extremely short contact length of the steel wire and the cutter surface, so that the cutting quality is ensured. In addition, when cutting is performed in the embodiment, the horizontal clearance between the upper rectangular cutting knife and the lower rectangular cutting knife is smaller than 1.5 wires; the horizontal gap between the upper rectangular cutting knife and the lower rectangular cutting knife is controlled, so that the shearing force of the curtain cloth in unit area can be increased, smooth cutting of the steel wire curtain wires is ensured, and the notch is smooth; so as to avoid the phenomenon of cutting burrs of the curtain cloth and affecting the quality of products. Furthermore, when in joint, the gap between feeding and delivering is adjusted to 1.5-2.5mm, and the sewing pressure of the upper joint device and the lower joint device is adjusted to 0.15-0.25Mpa; the control of the clearance between the feeding and the delivering during the joint can effectively control the joint quality, avoid the occurrence of the problem of thin wires and wire doubling, and influence the dynamic balance and uniformity qualification rate of the product. The control of the stitching pressure ensures that the joints of the steel cord are stitched smoothly, and the steel cord at the joints are arranged uniformly, so that the quality problems of thin threads, doubling and the like are avoided.

At present, two forms of reverse wrapping are adopted for the forming machine, one is to adopt capsule reverse wrapping, the capsule reverse wrapping is relatively uniform, but the reverse wrapping pressure is small; therefore, the problems of rebound of the steel wire and blank opening are easy to occur, and the storage period of the embryo is short.

In the present embodiment, as shown in fig. 9, the molding process includes: the inner liner 6 is attached to the tire body 5, the buckling ring, the tire body 5 is reversely wrapped, the reversely wrapped and pressed, the bead cloth and the tire side 3 are attached, and the tire blank is molded; the bonding of the inner liner 6 and the carcass 5 comprises bonding of the inner liner 6 and bonding of the steel wire carcass 5; wherein, after the steel wire carcass 5 is attached and the joint is completed, a rolling step is added; in addition, when the lower press roller rolls the steel wire carcass 5, the carcass drum 10 rotates at a rotating speed of 600-800mm/s, the pressure of the lower press roller is kept at 1-2bar, and translational rolling is carried out from the middle position of the steel wire carcass 5 to the end point of the carcass drum 10 at a speed of 5-30 mm/s; the rolling step and the rolling parameter setting can effectively exhaust the gas between the tyre body 5 and the airtight layer, the bubble rate of the tyre blank is reduced by more than 85%, the labor intensity of manually puncturing and repairing the tyre blank is greatly reduced, and the appearance quality of the tyre blank is greatly improved.

Further, the buckling ring comprises a finger-shaped sheet 12 for grabbing and a buckling ring disk 13 for buckling the buckling ring; the time for the finger-shaped sheet 12 to grasp the steel wire carcass 5 is 2-4s; when the buckling ring disk 13 buckles rings, the pause time is 1-2s when the buckling ring disk 13 moves to a designated position;

the reverse wrapping of the carcass 5 comprises the inflation of the reverse wrapping capsule 14; wherein the aeration of the anti-capsulated capsule 14 is specifically that of the anti-capsulated capsule 14 for 2-4s, and the pressure is kept at 3.5-4.5bar; the anti-pack capsule 14 is stopped for 2 to 4 seconds after the anti-pack capsule 14 is in place, and the anti-pack capsule 14 is deflated;

the reverse wrapping and pressing comprises rolling; the rolling is specifically that a lower pressing roller is in rising contact with the steel wire carcass 5 and keeps the pressure at 2-3bar, the carcass drum 10 rotates at a speed of 600-800mm/s, and the lower pressing roller rolls from the end point of the carcass drum 10 to the steel wire carcass turn-up end point 51 at a speed of 10-30 mm/s.

In order to further avoid the problems of short storage period of the embryo, easy rebound of steel wires and empty seam allowance, the embodiment limits the buckling ring, the reverse wrapping and reverse wrapping pressing process of the carcass 5.

The clasp in this embodiment includes a finger tab 12 for grasping; the time for the finger-shaped sheet 12 to grasp the steel wire carcass 5 is 2-4s; when the ring buckling disc 13 buckles rings, the stop time of the ring buckling disc 13 when moving to a specified position is 1-2s, and the arrangement of the ring buckling time can effectively ensure that the steel wire ring is positioned accurately, and the steel wire ring is in complete contact with the carcass steel wire 5 and is compact;

When the turn-up capsule 14 is inflated in the turn-up process of the carcass 5, the turn-up capsule 14 is inflated for 2-4s, and the pressure is kept at 3.5-4.5bar; the anti-pack capsule 14 is stopped for 2 to 4 seconds after the anti-pack capsule 14 is in place, and the anti-pack capsule 14 is deflated; the setting of the turn-up time and the pressure can ensure the turn-up quality, especially the compactness of the bead ring and the steel wire tire body at the seam allowance, and prolong the storage period of the tire blank.

The reverse wrapping pressing comprises rolling; the rolling is specifically that a lower pressing roller is in rising contact with the steel wire carcass 5 and keeps the pressure at 2-3bar, the carcass drum 10 rotates at a speed of 600-800mm/s, and the lower pressing roller rolls from the end point of the carcass drum 10 to the steel wire carcass turn-up end point 51 at a speed of 10-30 mm/s. The arrangement of pressure and rotating speed during the reverse wrapping rolling can effectively exhaust the gas between the tire body 5 and the airtight layer, the bubble rate of the tire blank is reduced by more than 85%, the labor intensity of manually puncturing and repairing the tire blank is greatly reduced, and the appearance quality of the tire blank is greatly improved.

In addition, the embryo molding comprises low-pressure inflation, the transfer ring is used for holding the composite part to move right after the low-pressure inflation, the PU drum is contracted to the width of the shaping position, and the machine head is inflated with high pressure; wherein the low-pressure aeration is carried out, and the low-pressure aeration pressure is 0.3-0.8bar; the head is charged with high pressure 1-1.3bar.

Specific case and Performance test

To illustrate the performance comparison of the wire carcass UHP tire bead 4 provided by the examples of the invention with the prior art bead 4 by way of specific examples, case 1, comparative example 1 and related performance testing sections are provided below as follows:

case 1

Selecting 245/45ZR18 specification for development and research, wherein the steel wire carcass 5 ply adopts 3+9 x 0.175NT steel wires, the rolling density is 60EPD, the rolling thickness is 1.8mm, the design width of the steel wire carcass 5 ply 2 is 480mm, and the falling point position of the steel wire carcass turn-up end point 51 is ensured to be lower than the position of the vertical distance 3mm of the rim protection lower end point 45;

the tackifying sheet 43 is made of a rubber material with Shore hardness of 69, the thickness of the rubber sheet is 0.7mm, the width of the rubber sheet is 80mm, the outer end point 432 of the tackifying sheet is attached to the steel wire carcass anti-wrapping end point 51 in a flush manner, and the inner end point 431 of the tackifying sheet is higher than the triangular adhesive end point 422 by a vertical distance of 5mm after being reversely wrapped;

the triangular glue 42 is made of glue material with Shore hardness of 90, the design height is 35mm, the falling point of the steel wire carcass turn-up end 51 is lower than the vertical distance 13mm of the triangular glue end 422 after the steel wire carcass 5-ply turn-up, and meanwhile, the thickness of the triangular glue 42 at the steel wire carcass turn-up end 51 is 3mm;

the nylon 66 material is used as the reinforcing layer 44, the rolling thickness is 1.15mm, the cutting angle is 50 degrees, the cutting width is 55mm, the single-layer is attached, the internal positioning in the attaching is 215mm, the external positioning is 270mm, the fact that the lower positioning point 441 of the reinforcing layer is lower than 15mm at the steel wire carcass turn-up end point 51 is ensured, and the upper positioning point 442 of the reinforcing layer is higher than 15mm at the upper end point 422 of the triangular glue is ensured.

Comparative example 1

The tire bead structure of the steel wire tire body 5 is the same as that of the tire bead structure of the steel wire tire body 5 provided by the invention, and the difference is that: the adhesive sheet 43 is not provided in the sub-aperture structure.

According to the invention, the tackifying film 43 is added between the steel wire carcass 5 ply and the bead ring 41, so that the purposes of improving the shearing between the bead ring 41 and the steel wire carcass 5 ply, improving the adhesiveness and prolonging the storage period of the green tire are achieved. The problem of the sub-opening void occurs only after the 245/45R18 (steel wire carcass) embryo is stored for 16-20h in the case 1 of the invention, while the phenomenon of the sub-opening void occurs after the 245/45R18 (steel wire carcass) embryo without the tackifying film 43 is stored for 2-6h in the comparative case.

Machine tool test:

machine tool tests were performed on steel wire carcasses of the sub-mouth structure of case 1 and comparative case, and on the existing 245/45R18 polyester carcasses, and the test results are shown in Table 1:

table 1 carcass machine tool test results

According to the test analysis of the machine tool, various indexes of the steel wire carcass passenger tire are improved relative to those of a normal semisteel tire, the bead structure of the steel wire carcass passenger tire is reasonable and feasible in design, and the product of the invention can be suitable for various road conditions, and is longer in service life and higher in safety.

To illustrate the structure of the steel carcass UHP tire provided by the examples of the invention and the performance comparison with existing tires by way of specific examples, examples 2-4 and related performance testing sections are provided below as follows:

case 2

205/45ZR17 88W is selected, the skeleton of the UHP product carcass 5 is a single-layer 1500D/2 polyester cord fabric, a single-layer 1500D/2 polyester cord is replaced by a single-layer steel wire carcass 2 x 0.25UT, and specific material information is shown in Table 2.

Table 2 case 2 wire carcass material information

Indoor test

Case 2 tire room test results are shown in table 3:

table 3 case 2 tire indoor test results

Outdoor evaluation test

The results of the outdoor evaluation test are shown in Table 4.

Table 4 case 2 tire outdoor evaluation test results

Conclusion: the UHP tire manufactured by the steel wire tire body UHP and the polyester tire body UHP has great advantages in comfort and operability as well as all improvement and improvement of the performances in terms of dry braking and noise through subjective evaluation, test and comparison results.

Case 3

245/45ZR20 103Y is selected, the UHP product carcass framework is 2 layers of 1500D/2 polyester curtain cloth, a layer of steel wire carcass 0.19+5 x 0.19NT replaces 2 layers of 1500D/2 polyester curtain cloth, the curtain cloth strength is equal, and specific material information is shown in Table 5.

TABLE 5 case 3 Steel wire matrix Material information

Indoor test

Case 3 tire room test results are shown in table 6:

table 6 case 3 tire indoor test results

Outdoor evaluation test

The results of the outdoor evaluation test are shown in Table 7.

Table 7 case 3 results of outdoor evaluation test of tire

Case 4

275/45R20 110W is selected, the UHP product carcass skeleton is two layers of 1500D/2 polyester cords, one layer of steel wire carcass 3+9 x 0.175T is used for replacing the two layers of 1500D/2 polyester cords, the equal cord strength is replaced, and specific material information is shown in Table 8.

Table 8 case 4 wire carcass material information

Indoor test

Case 4 the results of the tire room test are shown in table 9.

Table 9 case 4 tire indoor test results

Outdoor evaluation test

The results of the outdoor evaluation test are shown in Table 10.

Table 10 case 4 outdoor evaluation test results of tire

Conclusion: compared with a polyester matrix UHP tire, the steel matrix UHP tire is more excellent in comfort, handling and grip, and the noise level is also obviously reduced.

The process for manufacturing a steel wire carcass UHP tire according to the examples of the invention is described below in a specific case.

Case 5

The forming process of the steel wire carcass passenger tire comprises the following steps:

in the embodiment, 245/45ZR18 specification is selected for development and research, a matrix 5 adopts 3+9 x 0.175NT steel wire, the rolling density is 60EPD, and the rolling thickness is 1.8mm; nylon 66 material is used as the reinforcing layer 44, the calendaring thickness is 1.15mm, the cutting angle is 50 degrees, the cutting width is 55mm, the inner positioning is 215mm, and the outer positioning is 270mm.

The one-step molding process of the steel wire carcass 5 passenger tire comprises the following steps: fitting, buckling rings, presetting, reversely wrapping the tyre body 5 and unloading the tyre body. Wherein the attaching includes attaching the PA component 15, attaching the reinforcing layer 44, and attaching the steel wire carcass 5. The one-step molding process comprises the following steps:

(1) PA part 15 lamination (fig. 1): the main feeding template extends out, the carcass drum 10 rotates to 180 degrees+/-10 degrees, in the embodiment, the conveyor belt rotates synchronously, the front section of the PA component 15 (the lining sidewall composite part) is attached to the carcass drum 10, the press roller descends, swings and rotates to press the material head, the carcass drum 10 rotates, and the joint part is automatically pressed after the PA component 15 is attached;

(2) stiffening layer 44 is applied (fig. 2): the reinforcing layer 44 is previously adhered to the bead filler fitting device, and the carcass drum 10 is rotated to 135 deg. + -10 deg., in this embodiment, rotated by 135 deg.. The sub-mouth cloth attaching device translates to a designated position, the attaching device stretches out to be close to the carcass drum 10, the carcass drum 10 rotates to attach the reinforcing layer 44 to the carcass drum 10, and then the joint is automatically pressed;

(3) Steel wire carcass 5 is bonded (fig. 3): the main feed template is extended and the carcass drum 10 is rotated to 90 deg. + -5 deg., in this embodiment 90 deg.. The conveyor belt synchronously rotates, the front section of the steel wire carcass 5 is attached to the carcass drum 10, the thousand-layer roller lowers the pressure to tightly press materials, the carcass drum 10 rotates, the thousand-layer roller lifts after the steel wire carcass 5 is attached, and automatic stitching joint is carried out on the carcass 5;

in order to solve the problem of bubbles between the tire body 5 and the inner liner, a rolling step of the tire body 5 is added: the rear press roller stretches out to a designated position to press the carcass 5, the carcass drum 10 rotates at a rotating speed of 80+/-10 r/min, the pressure of the rear press roller is kept at 2-2.5bar, and translational rolling is performed outwards according to a preset transverse speed of 5-15mm/sec until the rolling at the end point of the carcass 5 is finished; through the rolling step, the air between the tire body 5 and the airtight layer can be effectively discharged, the air bubble rate of the tire blank is reduced by more than 85%, the labor intensity of manually puncturing and repairing the tire blank is greatly reduced, and the appearance quality of the tire blank is greatly improved.

In this example, the rotating carcass drum 10 was rotated at 80r/min, the post-press roll pressure was maintained at 2bar, and the translational rolling was performed outwardly at a set lateral speed of 10mm/sec until the rolling at the end point of the carcass 5 was completed.

(4) Clasp (fig. 4): the tire body drum 10 rotates to an angle of 180 degrees+/-10 degrees of the upper tire bead 4, the tire bead 4 transfer ring moves to a designated position of the tire body drum 10, the tire bead locking block is lifted to lock the tire bead 4, the high pressure of the tire bead 4 locking block is kept above 5.5bar, and the high pressure of the tire bead locking block is kept at 5.5bar in the embodiment; the bead 4 transfer ring is opened and translated to the other side for preparation for the next action; the high pressure of the tire bead locking block is kept above 5.5bar, the tire bead 4 can be effectively and accurately positioned, the tire bead 4 is not easy to shift during molding, and meanwhile, the tire bead 4 and the steel wire tire body are tightly attached to the seam allowance through the function of the tackifying sheet.

(5) Preformed (fig. 5): the tire body drum 10 rotates to an angle of 0 degrees+/-10 degrees of the upper tire crown 1, the tire crown 1 clamping ring translates to a tire body drum 10 forming position, the tire body drum 10 contracts to a preset forming position, the tire body drum 10 is inflated at a pressure of 1.1-1.3bar, the tire body drum 10 is inflated for 2-5s, after the steel wire tire body 5 is completely inflated, the holding blocks are loosened, the composite piece is completely contacted with the steel wire tire body 5 cords, the tread press roller stretches out of the middle part of the pressed tread, and the swinging press roller swings and rolls the shoulder parts and the wing parts of the tire crown 1 according to original parameters; the carcass drum 10 is inflated at a pressure of 1.3bar in this embodiment, and inflated at the carcass drum 10 for 2s. The carcass drum 10 is inflated at a pressure of 1.1-1.3bar to effectively ensure complete contact of the composite with the steel cords of the carcass 5 and tight connection; thereby improving the bonding strength of the carcass 5. Because the steel wire is strong relative to materials such as polyester, the rigidity is strong, and the increase preshaping pressure can guarantee that matrix 5 cord fully stretches before contacting with the complex, avoids because of insufficient stretching causes matrix cord crooked, forms unqualified product.

(6) Carcass 5 turnup (fig. 6): the mechanical turn-up lever 11 is under a pressure of not less than 3.5bar, in this embodiment the turn-up lever 11 is under a pressure of 3.5bar; the turnup bar 11 supports and presses the components of the sidewall 3, the carcass 5, the reinforcing layer 44, and the like from the bead portion to the end of the sidewall 3. In order to ensure that the end points of the steel wire anti-wrapping are tight, the problem that the seam allowance is free in the process of storing the tire blanks is solved, the rolling procedure of the pressing roller is adjusted, and the rolling is performed by swinging the pressing roller under the condition that the rolling pressure is 2-3bar from the bottom of the seam allowance to the end point of the tire sidewall 3. In this example the rotating press roll was set to a rolling pressure of 2.5bar. Through the rolling process, the anti-bag end points are tightly combined, so that the problem that the seam allowance is free in the process of storing the embryo is avoided. The turnup rod 11 can effectively realize turnup of the steel wire carcass cord fabric under the pressure of not lower than 3.5bar, and the problems of incomplete turnup, blank mouth and the like are avoided in the initial turnup process; at the same time, the interface element is given a certain pre-load force, providing good rolling conditions for the subsequent rolling.

(7) Tire unloading: the clamping blocks hold the tyre crown 1, the tyre bead locking blocks fall, the tyre shoulder 2 is exhausted, the middle drum is stopped, the tyre body drum 10 stretches to the position of the interval between the sucking discs, and the clamping blocks hold the tyre embryo to translate to the middle position and release.

The molding process has the following beneficial effects:

by using the forming process, the production efficiency of the UHP tire with the steel wire carcass is high, the production beat of each tire at the present stage is 2-2.5 min, and the production per shift reaches 190-240 per shift;

by using the molding process, the bonding effect is good, the quality comprehensive qualification rate of the UHP tire with the steel wire carcass reaches 99.6%, the factory internal control level is reached, and the quality index is superior to that of part of common semisteel tire products.

Case 6

The forming process of the steel wire carcass 5 passenger tire is specifically a secondary forming process:

in the embodiment, 245/45ZR18 specification is selected for development and research, 3+9 x 0.175NT steel wires are adopted for the matrix 5, the rolling density is 60EPD, and the rolling thickness is 1.8mm; nylon 66 material was used as the reinforcing layer 44, and the thickness was 1.15mm, and the cutting angle was 50 ° and the cutting width was 55mm.

The secondary method molding process of the steel wire carcass 5 passenger tire comprises the following steps: the lining layer 6 is attached to the tyre body 5, the buckling ring, the tyre body 5 is reversely wrapped, the reversely wrapped stitching is performed, the sub-mouth cloth and the tyre side 3 are attached, and the tyre blank is formed. Wherein the bonding of the inner liner 6 and the carcass 5 comprises bonding of the inner liner 6 and bonding of the steel wire carcass 5; the attaching of the sub-mouth cloth and the side wall 3 comprises attaching of the sub-mouth cloth and attaching of the side wall 3. The secondary method forming process comprises the following steps:

(1) And (3) laminating the inner liner 6: stepping on the automatic step foot pedal, the carcass drum 10 rotates to 0 ° ± 10 °, in this embodiment to 0 °; the inner liner feeding frame stretches out, the inner liner 6 is attached to the carcass drum 10 (attached according to the positioning line), the automatic stepping foot pedal switch is stepped on, the carcass drum 10 rotates for 1 week, the inner liner 6 cutter cuts at a fixed length, the inner liner 6 feeding frame retreats, and the inner liner 6 is connected and rolled.

(2) And (5) attaching the steel wire carcass 5: stepping on the automatic step foot pedal, the carcass drum 10 rotates to 90 ° ± 10 °, in this embodiment to 90 °; simultaneously, the steel wire carcass 5 is delivered from a feeding frame, the steel wire carcass cord is attached to the inner liner 6 according to a positioning line, an automatic stepping foot switch is stepped on, the carcass drum 10 rotates for one circle, and an automatic stitching instrument is used for jointing the steel wire carcass 5; the automatic stepping pedal switch is stepped on, the lower pressing roller is lifted to contact with the steel wire carcass 5, the pressure is kept at 1-2bar, the carcass drum 10 rotates at 600-800mm/s, and translational rolling is carried out from the middle position of the steel wire carcass 5 to the end point of the carcass drum 10 at 5-30 mm/s; through the rolling step, the air between the tire body 5 and the airtight layer can be effectively discharged, the air bubble rate of the tire blank is reduced by more than 85%, the labor intensity of manually puncturing and repairing the tire blank is greatly reduced, and the appearance quality of the tire blank is greatly improved.

In this embodiment, the lower press roll is raised to contact the wire carcass 5 and maintain the pressure at 1.5bar, the carcass drum 10 is rotated at 600mm/s, and the lower press roll is translationally rolled from the middle position of the wire carcass 5 to the end point of the carcass drum 10 at 10 mm/s.

(3) Bead ring 41 buckle: when the automatic step pedal switch is stepped on, the carcass drum 10 rotates to a specified angle, the finger-shaped sheet 12 stretches out, the buckling ring disk 13 on the headstock and the tailstock moves, the finger-shaped sheet 12 grabs the steel wire carcass 5 and bends inwards for 2-4s, the buckling ring disk 13 on the headstock and the tailstock continues to move until the steel wire ring 41 is buckled on the steel wire carcass 5, the buckling ring disk 13 stops for 1-2s, and the buckling ring disk 13 retreats; in this embodiment, the gripping time of the finger tab 12 is 2.5s and the pause time of the tucking disk 13 is 1.2s. The finger-shaped sheet 12 is grabbed for 2-4s, and the stop time of the ring buckling disk 13 to the designated position is 1-2s, so that the steel wire ring can be effectively ensured to be positioned accurately, and the steel wire ring is in complete contact and compaction with the carcass steel wire 5.

(4) And (5) reversely wrapping the carcass 5: the anti-package capsule 14 is inflated for 2-4s, the pressure is kept at 3.5-4.5bar, the headstock and the tailstock are moved to push the buckling ring disk 13 to squeeze the anti-package capsule 14 to move inwards, the anti-package capsule 14 is extruded by the steel wire matrix 5 to deform inwards, after the anti-package capsule 14 is stopped for 2-4s after being in place, the anti-package capsule 14 is deflated, meanwhile, the headstock and the tailstock are translated outwards, and the capsule is restored to finish the anti-package process. In this embodiment the pressure of the de-capsulated capsule 14 is kept at 3.5bar, and after the de-capsulated capsule 14 is left in place for 3s, the de-capsulated capsule 14 is deflated. The reverse osmosis capsule 14 is inflated for 2-4s and maintained at a pressure of 3.5-4.5bar when inflated; and the anti-package capsule 14 is stopped for 2-4s after being wrapped in place, and then is deflated, so that the anti-package quality can be effectively ensured, and the bonding stability of the carcass 5 is enhanced. The setting of the turn-up time and the pressure can ensure the turn-up quality, especially the compactness of the bead ring and the steel wire tire body at the seam allowance, and prolong the storage period of the tire blank.

(5) And (5) reversely packaging and pressing: the automatic step pedal switch is stepped on, the lower pressing roller is lifted to contact with the steel wire carcass 5, the pressure is kept at 2-3bar, the carcass drum 10 rotates at the speed of 600-800mm/s, and the lower pressing roller rolls from the end point of the carcass drum 10 to the steel wire carcass anti-wrapping end point 51 at the speed of 10-30 mm/s; in this example, the pressure of the lower press roll was 2.5bar and the rotational speed was 20mm/s; the carcass drum 10 is rotated at 800mm/s. The pressure of the lower pressing roller is 2-3bar when the reverse package is pressed, the carcass drum 10 rotates at the speed of 600-800mm/s, the lower pressing roller rolls at the speed of 10-30mm/s, the pressing effect can be effectively improved, and the combination stability of the carcass 5 is enhanced. The arrangement of pressure and rotating speed during the reverse wrapping rolling can effectively exhaust the gas between the tire body 5 and the airtight layer, the bubble rate of the tire blank is reduced by more than 85%, the labor intensity of manually puncturing and repairing the tire blank is greatly reduced, and the appearance quality of the tire blank is greatly improved.

(6) Attaching the sub-mouth cloth: stepping on the automatic step foot pedal, the carcass drum 10 rotates to 215 ° ± 10 °, in this embodiment to 215 °; the reinforcing layer feeding frame extends out, the reinforcing layer 44 is attached according to the positioning line, and the joint of the reinforcing layer 44 is rolled;

(7) and (3) attaching the side wall: stepping on the automatic step foot pedal, the carcass drum 10 rotates to 270 ° ± 10 °, in this embodiment to 270 °; the sidewall feeding frame extends out, the sidewall 3 is attached according to the positioning line, the joint of the sidewall 3 is rolled, an automatic stepping pedal switch is stepped on, the lower pressing roller and the rear pressing roller simultaneously extend out, and the sidewall 3 and the seam allowance part are rolled;

(8) Forming a embryo: the method comprises the steps of sleeving a section of tire blank, stepping an automatic step foot switch, separating a machine head to a stretching position positioning width, inflating at low pressure, enabling the pressure of low-pressure inflation to be 0.3-0.8bar, enabling a transfer ring to clamp a compound piece to move right, enabling a PU drum to shrink to a shaping position width, enabling the machine head to fill high pressure to be 1-1.3bar, enabling the transfer ring to open and move left after the compound piece is completely contacted with the section of tire blank, enabling the PU drum to rotate, enabling a crown 1 to imitate a compression roller and a rear compression roller to roll the center and the shoulder of the crown 1 respectively, enabling the compression rollers of the rear sections to reset, enabling the PU drum to shrink and deflate to unload the tire.

In the embodiment, the low-pressure inflation pressure is 0.4bar, the transfer ring is used for holding the composite part to move right, the PU drum is contracted to the width of the shaping position, and the machine head is inflated to 1.2bar.

The molding process solves the problems of empty seam and split of the side wall 3 and the like in the application of the steel wire tire body 5 on the passenger tire, ensures that the comprehensive qualification rate of the quality of the passenger tire of the steel wire tire body 5 reaches 99.6 percent, reaches the factory internal control level, and has better quality index than that of part of common semisteel tire products.

Case 7

In the embodiment, 245/45R18 specification is selected for concrete description, the carcass 5 of the tire adopts a steel cord with a 3+9 x 0.175NT structure, the diameter of the steel wire is 0.728mm, the rolling density is 60EPD, the rolling thickness is 1.8mm, and the design width of the steel wire carcass 5 is 480mm;

The diameter of the steel cord is only 0.728mm, and the NT steel cord is low in breaking force and rigidity of the steel cord, so that the steel cord is comprehensively evaluated to be thin and soft, and the cutting and the joint of the steel cord cannot be realized by using a conventional cutting process;

through comparative rigidity analysis, the cutting process of the steel wire cord fabric formed by the steel wire cord with the diameter of less than 0.8mm can be realized, and the following four conditions are required to be satisfied:

(1) the cutter surface is made of titanium alloy or other alloy with Rockwell hardness of HRC28-HRC45, and in the embodiment, a 3+9 x 0.175NT steel wire cord is cut at the moment, and a titanium alloy cutter with Rockwell hardness of HRC30 is selected;

(2) the cutting process requires that the gap between the cutting knives is controlled within 1.5 wires (0.015 mm); because the gap is too large to cut the steel cord smoothly, the cutter is easily damaged due to too small gap, and the service life is influenced; in this example, for this time 3+9×0.175nt steel cord was cut, the cutter gap was adjusted to 1.5 filaments; the steel wire cord can be cut smoothly, and the incision is smooth and free of burrs;

(3) the cutting process requires that the gap between the feeding and the delivering of the steel wire carcass 5 at the head and the tail is controlled within the range of 1.5-2.5mm during automatic joint; in this example, for this time 3+9×0.175nt steel cord cut, the gap between the feed and delivery carcass 5 was adjusted to 2.2mm; the gap between the feeding and the delivering of the steel wire carcass 5 at the head and the tail can be controlled within the range of 1.5-2.5mm during automatic joint, the joint quality can be effectively controlled, the problem of thin wire and wire doubling is avoided, and the dynamic balance and uniformity qualification rate of products are affected.

(4) The cutting process requires that the sewing pressure of the upper connector and the lower connector is regulated to 0.15-0.25MPa during automatic connector; in this example, the 3+9×0.175nt steel cord was cut, and the upper and lower splicer stitching pressures were adjusted to 0.2MPa. When the joint is automatically connected, the sewing pressure of the upper and lower joint devices is regulated to 0.15-0.25MPa, so that the joint of the steel cord is smoothly sewn, the steel cord at the joint is uniformly arranged, and the quality problems of thin wires, doubling and the like are avoided.

Under the condition of meeting four conditions required by the cutting process, the cutting process of the wirecord fabric formed by the wirecord with the diameter of less than 0.8mm comprises opening, cutting and jointing; wherein the cutting comprises the following step (3), and the joint comprises the following step (4), in particular:

(1) The rolled wirecord fabric roll is fixed on a unwinding device of the cutting machine by a crane and is unwound by a traction roller;

(2) Cutting off 1-2 steel wires from two sides of the steel wire cord fabric respectively, exposing the edge ends of the steel wire cord fabric to a fresh surface, and feeding the steel wire cord fabric to a rectangular cutter table of a cutting device by a cloth length fixing device;

(3) The cloth presser presses the wirecord fabric and cuts the wirecord fabric by a rectangular knife; wherein the rectangular knife surface is a titanium alloy knife surface with Rockwell hardness HRC 30; the clearance of the rectangular knife is adjusted to 1.5 wires;

(4) The cut wirecord fabric is adsorbed by a magnet clamp to turn at 90 degrees, and is conveyed to a splicing device to be spliced, the gap between the feeding and delivering carcass 5 is adjusted to be 2.2mm, and the stitching pressure of the upper connector and the lower connector is adjusted to be 0.2MPa; when in splicing, the two groups of umbrella-shaped wheels move to two sides along the seam of the two pieces of wirecord fabric in a zipper type, splicing is carried out, and then film pasting or edge covering and coiling are carried out.

The cutting process has the following beneficial effects:

by using the cutting process, when the wirecord fabric is cut, smooth cutting and jointing of the wirecord with the diameter lower than 0.8mm can be ensured, the wirecord can be cut smoothly, and the incision is smooth and free of burrs; the joints are smoothly sewed, and the steel wires and the cord wires at the joints are uniformly arranged, so that the quality problems of thin wires, doubling and the like are avoided; in addition, the type of the steel cord is not limited to NT, HT, ST, UT, MT, and the steel cord can be cut smoothly, so that a foundation is provided for the application of the steel cord carcass 5 on passenger tires;

the cutting machine can realize cutting of more varieties of steel wire cords, and the production efficiency is not affected by different varieties of steel wires.

Claims

1. A steel wire carcass UHP tire, the longitudinal section of the tire comprises a crown (1) positioned at the outer side of the upper part, a tire shoulder (2) connected with the crown (1), a tire sidewall (3) connected with the tire shoulder (2), a tire bead (4) connected with the lower part of the tire sidewall (3), and a tire seat A carcass (5) inside a tire cut surface, the carcass (5) comprising a carcass ply made of a single layer of steel cord comprising a plurality of steel wires, characterized in that the carcass ply has a strength index of 30000-50000N/dm, the breaking force of the steel cord is 350-850N, and the bending stiffness of the steel cord is 70Nmm ² -130 Nmm ² The diameter of the steel wire cord is between 0.5mm and 0.8mm, and the diameter of the steel wire is smaller than 0.3mm;

the tire bead (4) comprises a bead ring (41), wherein the circumference of the bead ring (41) is coated with an apex (42), the apex (42) extends to an apex end point (422) along the radial direction from an apex lower end point (421), a tire body (5) extends to a tire body turn-up end point (51) along the radial direction after being turned over to a tire side (3) by bypassing the bottom of the bead ring (41), a tackifying film (43) is arranged between the tire body (5) and the apex (42), and the tire body turn-up end point (51) is connected with the apex (42) through the tackifying film (43);

the tackifying sheet (43) comprises a tackifying sheet inner end point (431) positioned on the inner side of the triangular glue (42) and a tackifying sheet outer end point (432) positioned on the outer side of the triangular glue (42), wherein the radial height of the tackifying sheet inner end point (431) is higher than that of the triangular glue end point (422), the radial distance between the tackifying sheet inner end point (431) and the triangular glue lower end point (421) is not less than 5mm, and the radial distance between the tackifying sheet inner end point (431) and the triangular glue end point (422) is not less than 10mm; the radial height of the outer end point (432) of the tackifying sheet is not lower than the radial height of the carcass turn-up end point (51).

2. A steel wire carcass UHP tyre according to claim 1, characterized in that a reinforcing layer (44) is provided between said carcass (5) and said sidewalls (3), the lower end of said reinforcing layer (44) being located at a reinforcing layer lower anchor point (441), the upper end of said reinforcing layer (44) being located at a reinforcing layer upper anchor point (442), said carcass turn-up end (51) being located radially between said reinforcing layer lower anchor point (441) and said reinforcing layer upper anchor point (442); the radial distance between the anchor point (441) under the reinforcing layer and the carcass turn-up end point (51) is 10-20mm; the radial height of the locating point (442) on the reinforcing layer is higher than that of the endpoint (422) on the apex, and the radial distance between the locating point (442) on the reinforcing layer and the endpoint (422) on the apex is greater than 10mm; the reinforcing layer (44) makes an angle of 0-55 DEG with the circumference of the tire.

3. A steel wire carcass UHP tyre as claimed in claim 2, wherein the radial height of said apex (422) is higher than the radial height of said carcass turn-up end (51), the radial distance of said apex (422) from said carcass turn-up end (51) is greater than 10mm, the thickness of said apex (42) at the junction with said carcass turn-up end (51) is not less than 2mm, and the thickness of said adhesion promoting film (43) is from 0.5 to 2mm.

4. A steel wire carcass UHP tyre as claimed in claim 3, further comprising a rim protection lower extremity (45) located at said sidewalls (3) and connected to the rim, the radial distance between said carcass turnup extremity (51) and said rim protection lower extremity (45) being less than 15mm.

5. A steel carcass UHP tyre as claimed in claim 2, wherein the radial height of said apex (422) is lower than the radial height of said carcass turn-up end (51), the radial distance of said apex (422) from said carcass turn-up end (51) is greater than 10mm, and the thickness of said tackifying film (43) is comprised between 1.0 and 4.0mm.

6. A wire carcass UHP tyre as claimed in claim 5, wherein the distance between the inner surfaces of said carcass (5) on either side of said bead ring (41) at said carcass turnup end (51) is comprised between 2.0 and 5.0mm; the distance between the outer surface of the carcass (5) located outside the bead ring (41) and the outer surface of the sidewall (3) at the carcass turn-up end (51) is 2.5-10mm.

7. Process for the manufacture of a steel wire carcass UHP tyre as claimed in any one of claims 1 to 6, comprising a cutting process and a shaping process, characterized in that,

The cutting process comprises opening, cutting and jointing;

the forming process comprises the following steps: attaching, buckling rings, presetting, reversely wrapping and unloading the tyre body (5);

the bonding comprises bonding of the PA component (15), bonding of the reinforcing layer (44) and bonding of the steel wire carcass (5); after the steel wire tire body (5) is attached and the joint is completed, the rear press roller extends to a designated position to press the steel wire tire body (5), the tire body drum (10) rotates at the rotating speed of 80+/-10 r/min, the rear press roller pressure is kept at 2-2.5bar, and translational rolling is performed outwards according to the transverse speed which is set to be 5-15mm/sec until the rolling at the end point of the tire body (5) is finished.

8. Process for manufacturing a steel carcass UHP tyre according to claim 7, characterized in that said bead comprises a bead (4) lock bead; wherein after the bead (4) locking block locks the bead (4), the high pressure of the bead (4) locking block is kept above 5.5 bar;

said pre-shaping comprising inflation of the carcass drum (10); wherein said carcass drum (10) is inflated at a pressure of 1.1-1.3 bar;

the reverse wrapping of the carcass (5) comprises a reverse wrapping rod (11); when the unpacking rod (11) unpacks, the pressure of the unpacking rod (11) is not lower than 3.5bar; and after the package is turned over, the rolling roller swings and rotates to keep the rolling pressure of 2-3bar for rolling.

9. Process for the manufacture of a steel wire carcass UHP tyre as claimed in any one of claims 1 to 6, comprising a cutting process and a shaping process, characterized in that,

the cutting process comprises opening, cutting and jointing;

The forming process comprises the following steps: the lining layer (6) is attached to the tyre body (5), the buckling ring, the tyre body (5) is reversely wrapped, the reversely wrapped and pressed, the rim cloth is attached to the tyre side (3), and the tyre blank is molded;

the bonding of the inner liner (6) and the carcass (5) comprises bonding of the inner liner (6) and bonding of the steel wire carcass (5); after the steel wire tire body (5) is attached and the joint is completed, the lower pressing roller is lifted to contact with the steel wire tire body (5), the pressure is kept at 1-2bar, the tire body drum (10) rotates at the speed of 600-800mm/s, and the lower pressing roller translates and rolls from the middle position of the steel wire tire body (5) to the end point of the tire body drum (10) at the speed of 5-30 mm/s.

10. Process for manufacturing a steel carcass UHP tyre according to claim 9, characterized in that said bead comprises a finger tab (12) gripping and bead disc (13) bead; the time for the finger-shaped sheet (12) to grasp the steel wire carcass (5) is 2-4s; when the ring buckling disc (13) buckles rings, the pause time is 1-2s when the ring buckling disc (13) moves to a designated position;

the reverse package of the carcass (5) comprises the inflation of a reverse package bag (14); wherein the inflation of the anti-encapsulation bag (14) is specifically that the anti-encapsulation bag (14) is inflated for 2-4s, and the pressure is kept at 3.5-4.5bar; the turn-up bladder (14) is deflated after being stopped for 2-4s after being turned up in place;

the reverse wrapping pressing comprises rolling; the rolling is specifically that a lower pressing roller is in rising contact with the steel wire carcass (5) and keeps the pressure at 2-3bar, the carcass drum (10) rotates at the speed of 600-800mm/s, and the lower pressing roller rolls from the end point of the carcass drum (10) to the anti-wrapping end point (51) of the steel wire carcass at the speed of 10-30 mm/s.