WO2021196804A1

WO2021196804A1 - Tire with different upper and lower mold bead diameters and manufacturing method therefor

Info

Publication number: WO2021196804A1
Application number: PCT/CN2020/142353
Authority: WO
Inventors: 王�锋; 滕雷; 杨德建; 杨才欣; 陈雪梅; 朱丽艳; 陈东; 吕建强
Original assignee: 山东玲珑轮胎股份有限公司
Priority date: 2020-04-03
Filing date: 2020-12-31
Publication date: 2021-10-07
Also published as: CN111439071A

Abstract

Disclosed are a tire with different upper and lower mold bead diameters and a manufacturing method therefor. The tire comprises a tire body (1), the tire body (1) comprising a tire crown (30), a tire sidewall (50) and tire beads (60), wherein the tire crown (30) comprises a tread rubber layer (38) and tire crown reinforcements (40), the tire sidewall (50) extends radially outward from the tire beads (60) to the tire crown (30), the tire beads (60) are externally connected to mounting rims, the tire beads (60) comprise a first tire bead (61) and a second tire bead (62) that have different sizes, and the first bead (61) and the second bead (62) are in contact with corresponding mounting rims, such that the tire body (1) is fixed to the mounting rims; and a plurality of the tire crown reinforcements (40) are arranged in the tire crown (30), and the tire crown reinforcements (40) are anchored on the tire beads (60) at corresponding positions by means of surrounding an annular steel wire reinforcement structure. The problem of a common tire being limited by the size of the tire bead part is effectively solved, the aim of locking the tire beads on two sides of the tire is achieved, and therefore, tire production is achieved.

Description

Tire with different bead diameters of upper and lower molds and manufacturing method thereof

Technical field

The invention relates to the technical field of bead processing, in particular to a tire with different bead diameters of upper and lower molds and a manufacturing method thereof.

Background technique

The bead is also called the spigot, which refers to the part of the tire installed on the rim, which is composed of a bead core and chafer. It can withstand the tension caused by the internal pressure, and at the same time overcome the lateral force of the tire during cornering, so that the tire will not fall out of the rim. Therefore, it must have high strength, the structure should be tight and firm, and not easy to deform.

The bead has a generatrix whose axial inner end is located on a ring with a larger diameter than the axial outer end of the bead. This type of structure is particularly suitable for new tires, which can be used for low pressure within a certain limit, even The use of zero pressure and virtually zero pressure eliminates the risk of the tire being separated from the rim on which it is installed.

technical problem

The Chinese Patent (Authorized Announcement Number: CN1176816C) discloses a tire bead with increased flexibility, and the carcass-type structure is optimized to form an elongated portion that exceeds the base of the cord laminate toward the axis of rotation of the tire. In this case, since the overturning of the carcass type structure is not indispensable for fixing purposes, the overturning may not overlap the annular cords along the structure, so that the type of the whole carcass is strengthened. But usually the size of the bead on both sides of the tire is the same. This tire can be mounted on a conventional rim. But for some rims with special market demand, the diameters of the rims on both sides are different. Ordinary tires cannot be installed normally due to the limitation of the size of the bead. Therefore, on the basis of this patent, a certain optimization design can be carried out on the radial tire.

Technical solutions

The purpose of the present invention is to provide a tire with different bead diameters on the upper and lower molds and a manufacturing method thereof, so as to solve the problems raised in the background art.

In order to achieve the above objectives, the present invention provides the following technical solutions:

A tire with different bead diameters for upper and lower molds, including a tire, the tire including a crown, a sidewall and a bead, the bottom of the crown is provided with a belt zone, and the belt zone includes a zero-degree belt Layer and small-angle belt layer, the outer side of the bead is provided with a sidewall connecting layer, the inner area of the belt area is provided with a carcass, the base of the carcass is a bead, and the bead The inner and outer sides are respectively provided with an upper filling rubber and a lower filling rubber, the rubber surface layers of the upper filling rubber and the lower filling rubber are provided with a steel wire spigot covering cloth, and the outer side of the bead is provided with a wear-resistant rubber strip, The tire crown includes a tread rubber layer and a crown reinforcement, the sidewall extends radially outward from the bead to the crown, the bead is circumscribed with a mounting rim, and the bead includes two different sizes The first bead and the second bead are in contact with the corresponding mounting rim, thereby fixing the tire to the mounting rim, and a number of crowns are arranged in the crown Reinforcement, the carcass reinforcement is anchored on the bead at the corresponding position by surrounding the ring-shaped steel wire reinforcement structure.

As a further solution of the present invention: the crown reinforcement is composed of steel wire and nylon fiber and covers the tire in a circumferential direction along the tire track.

As a further solution of the present invention: the tread rubber layer includes a tread layer, the tread layer is provided with a tread pattern, a buffer rubber layer is provided below the tread layer, and the buffer rubber layer A rubber protective layer is provided, a crown connecting layer is arranged below the rubber protective layer, a carcass protective layer is arranged on the lower outer ring of the crown connecting layer, and the inner cavity of the carcass protective layer is provided with a corresponding Bead protection layer.

As a further solution of the present invention, a corresponding forming drum is arranged on the inner side of the bead, and forming blocks of different sizes are provided on both sides of the forming drum to meet the requirements of different diameter traveler buckles.

As a further solution of the present invention: the chamfers on both sides of the forming drum are of different sizes, the radius of the chamfer on one side is in the range of 0.1mm to 70mm, and the radius of the chamfer on the other side is in the range Within the range of 0.1mm to 50mm.

As a further solution of the present invention: the tire is externally provided with a buckle disk, and the size of the buckle disk corresponds to the cinch on both sides of the tire.

As a further solution of the present invention: the first bead and the second bead provided in the tire have different diameters, and the diameters of the first bead and the second bead on the left and right sides are different between 0.5 inch and 1 inch.

The invention also discloses a method for manufacturing tires with different bead diameters on the upper and lower molds, which includes the following steps:

Step 1: Prepare the building drum and buckle plate of the corresponding size according to the size of the bead. The building drum has different chamfer sizes on the left and right. The radius of side chamfer R1 is in the range of 0.1mm to 70mm, and Ⅱ The radius of the side chamfer R2 is in the range of 0.1mm to 50mm, and the size of the buckle plate used corresponds to the size of the first and second bead used by the tire;

Step 2: During forming, the second bead with a smaller diameter corresponds to the side I with a larger chamfer, and the first bead with a larger diameter corresponds to the side II with a smaller chamfer;

Step 3: When forming, the bead is pushed by the buckle plate to hit the building drum, and the left and right collisions are synchronized. It is necessary to ensure that the bead is fixed on the chamfers R1 and R2 of the building drum after the collision. There is no loosening and falling off of the beads. The rest of the molding steps are the same as those of conventional tires.

Beneficial effect

Compared with the prior art, the beneficial effects of the present invention are:

one. The most significant feature of the present invention is that the design is a tire with different bead diameters on both sides. The bead includes two first bead and second bead with different sizes. The first bead and the second bead The ring is in contact with the corresponding mounting rim, thereby fixing the tire to the mounting rim, which effectively solves the problem that ordinary tires cannot be installed normally due to the limitation of the size of the bead part.

two. This application is designed with corresponding building drums and buckle disks to form and assemble the first bead and second bead mechanism. Through the tire building process, the building drums, buckle disks, etc., are involved in the manufacture of the bead part. The corresponding size design and improvement of the equipment have achieved the purpose of locking the bead on both sides of the tire, thus realizing the production of the tire.

three. This application is designed with multiple protection mechanisms from inside to outside, and the carcass and the bead area are designed as a corresponding wrapped structure, thereby reducing and improving the overall stability effect and effectively protecting the inner bead area.

It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the application.

Description of the drawings

The drawings herein are incorporated into the specification and constitute a part of the specification to show embodiments in accordance with the application, and together with the specification are used to explain the principle of the application. At the same time, these drawings and text description are not intended to limit the scope of the concept of the present application in any way, but to explain the concept of the present application for those skilled in the art by referring to specific embodiments.

Figure 1 is a schematic diagram of the tire structure of the present invention.

Figure 2 is a schematic diagram of the structure of the bead in the present invention.

Fig. 3 is a schematic diagram of the structure of the tire crown in the present invention.

Fig. 4 is a schematic diagram 1 of the assembly operation of the forming equipment in the present invention.

Fig. 5 is a first schematic diagram of the assembly of the forming equipment in the present invention.

Figure 6 is a schematic diagram of the size matching of the forming drum in the present invention.

In the picture: 1-tire, 10-building drum, 20-buckle plate, 30-crown, 40-crown reinforcement, 50-sidewall, 60-bead, 11-belt zone, 12-zero angle Belt layer, 13-small-angle belt layer, 14-carcass, 15-side connecting layer, 16-steel splint covering, 17-filler, 18-filler, 19-wear-resistant rubber strip , 31-Tread layer, 32-Tread pattern, 33-Buffer rubber layer, 34-Rubber protective layer, 35-Crown connecting layer, 36-Carcass protective layer, 37-Bead protective layer, 61-First Bead, 62-second bead.

Embodiments of the present invention

The technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the accompanying drawings in the embodiments of the present invention, and examples thereof are shown in the accompanying drawings. When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or same elements.

Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

Example one:

1 and 2, a tire with different bead diameters in the upper and lower molds includes a tire 1, and the tire 1 includes a crown 30, a sidewall 50 and a bead 60.

The bottom of the tire crown 30 is provided with a belt zone 11, the belt zone 11 includes a zero-angle belt layer 12 and a small-angle belt layer 13, and the outer side of the bead 60 is provided with a sidewall connecting layer 15. A carcass 14 is provided in the inner region of the belt zone 11, and the base of the carcass 14 is a bead 60. The inner and outer sides of the bead 60 are respectively provided with an upper filler 17 and a lower filler 18 , The upper and lower filling rubber 17 and the lower filling rubber 18 are provided with a steel wire spigot covering cloth 16, the outer side of the bead 60 is provided with a wear-resistant rubber strip 19, the upper filling rubber 17 and the lower filling rubber 18 is used to effectively protect and cushion the carcass 14 and the bead 60, and the steel wire splint 16 and the wear-resistant rubber strip 19 are used to improve the practical life of the tire.

The crown 30 includes a tread rubber layer 38 and a crown reinforcement 40. The sidewalls 50 extend radially outward from the bead to the crown 30. The bead 60 is circumscribed with a mounting rim, and the bead 60 includes two first beads 61 and second beads 62 with different sizes, said first beads 61 and second beads 62 are in contact with the corresponding mounting rim, thereby fixing the tire to the mounting rim, A number of crown reinforcements 40 are arranged in the crown 30, and the carcass reinforcement 40 is anchored to the bead 60 at the corresponding position by surrounding the ring-shaped steel wire reinforcement structure. The crown reinforcement 40 is formed by It is composed of steel wire and nylon fiber and covers the tire 1 track in the circumferential direction.

The most significant feature of the present invention is that the design is a tire with different bead diameters on both sides. The bead 60 includes two first bead 61 and a second bead 62 with different sizes. The first bead 61 And the second bead 62 is in contact with the corresponding mounting rim, thereby fixing the tire to the mounting rim, which effectively solves the problem that ordinary tires cannot be installed normally due to the limitation of the size of the bead part, so as to achieve the realization of tires on both sides of the tire. The purpose of locking the ring, so as to achieve the production of tires.

Embodiment two:

3, this embodiment is further optimized as the first embodiment. On the basis of this, the tread rubber layer 38 includes a tread layer 31, and the tread layer 31 is provided with a tread pattern 32. A buffer rubber layer 33 is provided below the tread layer 31, a rubber protective layer 34 is provided below the buffer rubber layer 33, and a crown connecting layer 35 is provided below the rubber protective layer 34. The lower outer ring of 35 is provided with a carcass protective layer 36, and the inner cavity of the carcass protective layer 36 is provided with a corresponding bead protective layer 37. In this application, the tread rubber layer 38 is designed to protect the tire, and the carcass and the bead area are designed as a corresponding wrapped structure, thereby reducing and improving the overall stability effect and effectively protecting the inner bead area.

Example three:

Please refer to Figures 3 to 6, this embodiment is further optimized as the first embodiment. On the basis of this, a corresponding forming drum 10 is provided on the inner side of the bead 60, and forming tiles of different sizes are provided on both sides of the forming drum 10 To meet the requirements of traveler buckles with different diameters, the chamfers on both sides of the forming drum are of different sizes. The radius of the chamfer on one side is in the range of 0.1mm to 70mm, and the chamfer on the other side The radius of is in the range of 0.1mm to 50mm.

The tire 1 is externally provided with a buckle disk 20. The size of the buckle disk 20 corresponds to the inch openings on both sides of the tire. The first bead 61 and the second bead 62 provided in the tire 1 have different diameters, and The diameters of the first bead 61 and the second bead 62 on both sides differ between 0.5 inch and 1 inch.

This application is designed with a corresponding building drum 10 and a buckle plate 20 to form and assemble the first bead 61 and the second bead 62 mechanism. Through the tire building process, the building drum, which is manufactured at the bead part, is involved. The corresponding size design and improvement of the buckle plate and other equipment have achieved the purpose of locking the bead on both sides of the tire, thereby realizing the production of the tire.

To further illustrate this application, the present invention also discloses a method for manufacturing tires with different bead diameters on the upper and lower molds, which includes the following steps:

Step 1: Prepare the building drum 10 and the buckle plate 20 of the corresponding size according to the size of the bead; the building drum 10 has different chamfer sizes on the left and right, and the radius of the chamfer R1 on the side I is in the range of 0.1mm to 70mm Inside, the radius of the Ⅱ side chamfer R2 is in the range of 0.1mm to 50mm. The size of the buckle disc 20 used corresponds to the size of the first bead 61 and the second bead 62 used in the tire 1 one-to-one.

Step 2: During forming, the second bead 62 with a smaller diameter corresponds to the side I with a larger chamfer, and the first bead 61 with a larger diameter corresponds to the side II with a smaller chamfer.

Step 3: When forming, the bead 60 is pushed by the buckle disk 20 and hits the forming drum 10, and the left and right ring hits are performed simultaneously. And it is necessary to ensure that the beads are fixed on the chamfers R1 and R2 of the forming drum after the ring is hit, and the beads are not loose and fall off. The rest of the molding steps are the same as those of conventional tires.

Industrial applicability

For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description, and therefore it is intended to fall within the claims. All changes within the meaning and scope of the equivalent elements of are included in the present invention. Any reference signs in the claims should not be regarded as limiting the claims involved.

In addition, it should be understood that although this specification is described in accordance with the implementation manners, not each implementation manner only includes an independent technical solution. This narration in the specification is only for the sake of clarity, and those skilled in the art should regard the specification as a whole The technical solutions in the various embodiments can also be appropriately combined to form other implementations that can be understood by those skilled in the art.

Claims

A tire with different bead diameters for upper and lower molds, comprising a tire (1), the tire (1) comprising a crown (30), a sidewall (50) and a bead (60), the crown (30) A belt zone (11) is provided at the bottom. The belt zone (11) includes a zero-angle belt layer (12) and a small-angle belt layer (13). The outer side of the bead (60) is provided with The sidewall connecting layer (15), the inner region of the belt region (11) is provided with a carcass (14), characterized in that the foundation of the carcass (14) is a bead (60), and the tire The inner and outer sides of the ring (60) are respectively provided with an upper filling rubber (17) and a lower filling rubber (18), and steel wire spigots are provided on the rubber surface layers of the upper filling rubber (17) and the lower filling rubber (18) Wrapping cloth (16), the outer surface of the bead (60) is provided with a wear-resistant rubber strip (19);

The crown (30) includes a tread rubber layer (38) and a crown reinforcement (40), the sidewall (50) extends radially outward from the bead to the crown (30), and the bead (60) A mounting rim is connected externally, the bead (60) includes two first bead (61) and a second bead (62) with different sizes, the first bead (61) and the second bead The bead (62) is in contact with the corresponding mounting rim, thereby fixing the tire to the mounting rim. A number of crown reinforcements (40) are arranged in the crown (30), and the carcass reinforcement (40) ) It is anchored to the bead (60) at the corresponding position by surrounding the ring-shaped steel wire reinforcement structure.
The tire with different bead diameters from the upper and lower molds according to claim 1, wherein the crown reinforcement (40) is composed of steel wire and nylon fiber and covers the tire (1) in a circumferential direction along the track of the tire (1).
The tire with different bead diameters in the upper and lower molds according to claim 1, wherein the tread rubber layer (38) comprises a tread layer (31), and the tread layer (31) is provided with a tread A pattern (32), a buffer rubber layer (33) is provided under the tread layer (31), a rubber protective layer (34) is provided under the buffer rubber layer (33), and the rubber protective layer (34) ) Is provided with a crown connection layer (35), the lower outer ring of the crown connection layer (35) is provided with a carcass protective layer (36), and the inner cavity of the carcass protective layer (36) is provided with Corresponding bead protection layer (37).
The tire with different bead diameters in the upper and lower molds according to claim 1, characterized in that the inner side of the bead (60) is provided with a corresponding building drum (10), and the two sides of the building drum (10) have different sizes. Forming tiles to meet different diameter traveler buckles.
The tires with different bead diameters of the upper and lower molds according to claim 4, characterized in that the chamfer sizes of the two sides of the building drum (10) are different, and the radius of the chamfer on one side is 0.1mm to 70mm The radius of the chamfer on the other side is in the range of 0.1mm to 50mm.
The tires with different bead diameters in the upper and lower molds according to claim 5, characterized in that the tire (1) is externally connected with a buckle disk (20), and the size of the buckle disk (20) is the same as the size of the tire on both sides of the tire. Corresponding.
The tire with different bead diameters in the upper and lower molds according to claim 6, characterized in that the first bead (61) and the second bead (62) provided in the tire (1) have different diameters, and the left and right bead The diameter difference between the first bead (61) and the second bead (62) on the side is between 0.5 inch and 1 inch.
The method for manufacturing tires with different bead diameters in the upper and lower molds according to any one of claims 1-7, characterized in that it comprises the following steps:

Step 1: Prepare the building drum (10) and buckle plate (20) of the corresponding size according to the size of the bead. The building drum (10) has different chamfer sizes on the left and right. The radius of the chamfer R1 on the side I is set at In the range of 0.1mm to 70mm, the radius of side chamfer R2 is in the range of 0.1mm to 50mm. The size of the buckle disc (20) is the same as the first bead (61) and the first bead (61) used by the tire (1). The size of the two beads (62) corresponds one to one;

Step 2: During forming, the second bead (62) with a smaller diameter corresponds to the side I with a large chamfer, and the first bead (61) with a larger diameter corresponds to the side II with a small chamfer;

Step 3: When forming, the bead (60) is pushed by the buckle plate (20) and hits the building drum (10), and the left and right collisions are synchronized, and it is necessary to ensure that the bead is fixed in place after the collision. On the chamfers R1 and R2 of the forming drum, the beads are not loose and fall off.