HU218199B - Pneumatic tire and an unvulcanizated carcass as an intermediate article in its manufacture - Google Patents

Abstract

FIELD OF THE INVENTION The present invention relates to an inflatable tire and an unvulcanized jacket as a semi-finished product of a tire. According to the invention, the unvulcanized jacket frame as a tire is a semi-finished inflatable tire with an inflatable textile insert, which is composed of a substantially entoroidal layered casing, tread, reinforcing lining, and characterized in that the sheath frame (10) has a width Wp and two frame ends and is defined by the distance between these frame ends. a corded web (24) stiffened with longitudinal weft yarns (22), embedded in a textile insert (24) having a cord yarn (22) at an angle of between 65 ° and 90 ° to the longitudinal direction (LI) of the textile insert (20), at least one of the saddles (20) attached to the textile insert (20) 30), a cushion (60), a liner (50), a side wall (70), a white wall strip, a support strip and a binder strip (40), and - a textile insert (20) and its components having joint ends and a skeleton; the burner is assembled along a parallel plane extending parallel to the threads (22) of the textile insert at the axial width of the article. The radial tire according to the invention is in the form of a textile insert, in the form of an inflatable toroid having a running surface and at least two textile inserts, which, in contrast to the plane of the equatorial plane of the tire, is at an angle of 17 ° to 30 °, and is characterized in that the jacket frame (10) is at least one consisting of a textile insert (20) containing radially oriented cord yarns (22) and other cladding elements, the casing frame being formed by fitting the textile insert (20) and at least two cladding portions along a single surface or plane. ŕ

Description

The radial tire of the present invention is in the form of a textile inflatable toroidal tire having a tread and at least two textile inserts, which is of a contoured, contoured angle with respect to the tire's equatorial plane, characterized by 10) comprising at least one textile insert (20) and other casing members comprising radially oriented cord yarns (22), the semi-finished casing being formed by joining the textile casing (20) and at least two casing members along a single surface or plane.

The present invention relates to an inflatable tire and an unvulcanized casing as a semi-finished tire. The cylindrical casing, when unvulcanized, is formed into a cylindrical shape at a casing forming station and thus forms an integral part of a radial textile inflatable tire. The present invention is described as a radial inflatable tire for automotive tires, but is also applicable to light duty vehicles, medium trucks, agricultural machinery, off-road vehicles and other radial textile tires.

The pneumatic tire consists essentially of toroidal, plywood beads, treads, and stiffener. Each component is placed on a jacket-forming drum and cut to length so that the ends of the component overlap or overlap to form a joint.

In the first stage of the assembly, the casing comprises one or more textile inserts, a pair of sidewalls, a pair of saddles (in the case of tubeless tires), an inner lining, a pair of boots and possibly a pair of rubber shoulder straps. At this stage of the tire construction, annular bead cores may be added and the textile insert or textile inserts may be wrapped around the bead cores to form a "recycled part of the textile insert".

The components of the sheathing body (with the exception of the bead cores) are either "dull-fitting" or "overlapping-fitting". In the case of a blunt fitting, the ends of the component come into contact but do not overlap. In case of overlapping, the ends overlap.

At this point in the first stage of the assembly, this semi-finished product is shaped into a cylinder. After completion of the first stage of tire construction, the cylindrical casing is expanded to a toroidal shape to form a cylindrical semi-finished product. In the second stage of tire production, for which the same tire-forming drum or workstation can be used, the reinforcing thread inserts and tread are added to the semi-finished product.

When the casing is expanded, tensile stresses are applied to the assembled and unvulcanized components of the casing.

Overlapping joints were preferred for textile inserts because the joint remained intact, while the butt joints often had openings or malfunctions. Despite the good adhesion of the overlapping joint yarns adjacent to the stitching, there is a tendency to elongate, which creates an equalization between the two overlapping layers of corded yarn. This localized swelling causes unevenness, which can be well detected by X-ray or ultrasound. A solution to overlapping joining along an oblique guide is the development under patent LU 41755.

Tire manufacturers have so far ensured that the joints of the various layers of components do not overlap to prevent unevenness in the tire. It was believed that this shifting of the joint joints improves the overall durability of the casing, as measured by the maximum fracture toughness of the tire. Tire engineers also believed that the smoothness of the tire could be improved by deliberately locating these discontinuities around the casing frame.

The subject matter of this patent application completely reverses this conventional view of the casing structure. The mantle frame is formed by a plurality of components having common assembly lines.

It is an object of the present invention to increase the breaking strength of a tire, and thereby to reduce or eliminate unevenness in the fitting.

The object of the present invention is achieved by a cylindrical or toroidal, unvulcanized casing frame having a semi-finished cylindrical or toroidal shape for a radial inflatable tire having a casing having a length Wp and a length of meridian defined by the distance between these ends. at least two of the embedded textile insert, the cord of which has an angle of 65 ° to 90 ° with the length of the textile insert, made up of one or more saddlery, pawl, liner, sidewall, white stripe, support strip and binder strip and bonded to each other, its components have common skeleton ends and the skeleton ends have a plane extending substantially parallel to the axial width (W) of the article, substantially parallel to the textile thread cords with it together.

In a preferred embodiment of the casing according to the invention, the plane passes through the textile insert at an angle Θ, parallel to the cord yarn, where the plane forms an angle perpendicular to the textile insert between 90 ° and 60 °, preferably 80 ° Θ. in.

In another preferred embodiment of the casing according to the invention, the components connected to the textile insert are formed by a lining and two sidewalls.

HU 218 199 Β

The invention further provides a radial tire in the form of an inflatable toroidal textile insert having a tread and at least two textile inserts, the textile insert having an angle of 17 ° to 30 ° with respect to the plane of alignment of the tire, consisting of at least one textile insert containing radially oriented cord yarn and other mantle elements, the semi-finished article being manufactured by assembling the mantle and at least two mantle elements along a single surface or plane.

In a preferred embodiment of the radial tire according to the invention, the casing frame has a defined width and two frame ends and is provided with a non-vulcanized rubber textile insert reinforced with cord yarns having a length determined by the distance between the frame ends. have at least two tablecloths made of one or more saddles, cushion belt, lining, sidewall, white stripe, cover strip and binder strip, and have a textile insert and a laminate overlapping substantially across the axial width of the article, is formed by common frame ends joined along a plane. The angle sik is inclined at an angle Θ through the textile insert, parallel to the cord yarn and perpendicular to the normal plane of the textile insert, the angle Θ is less than 90 ° and greater than 60 °, preferably Θ 80, radial tire The components connected to the textile insert are formed of a single lining and two sidewalls.

The tire according to the invention will be described in detail with reference to the accompanying drawings, in which:

FIG. Fig. 1-1 is a cross-sectional view of the sheath drum (not shown) prior to forming it into a cylindrical shape,

2A. Figure 3A is a partial plan view of the inside surface of the jacket frame with the components connected;

2B. Fig. 4A is a partial plan view of the outer surface of the jacket frame with the attached components; both 2A, 2B, and 2B. Figure 3A is slightly inclined to illustrate the skeleton ends;

Fig. 3 is an enlarged transverse sectional view of one of the skeleton ends of the jacket skeleton; figure

3- 3 according to the pruning shear, a

Fig. 4 is an enlarged transverse sectional view of the opposite end of the sheath frame; figure

4-4, according to

Figure 5 is a detail view of the jacket skeleton showing the attachment joint of the jacket skeleton before expanding to the toroidal shape,

Fig. 6 is a detail view of the mantle frame showing the assembly of the mantle after the tubular member has been cylindrical in shape on a toroidal jacket-forming drum;

7A. Fig. 4A is a perspective view of a casing frame formed into a cylindrical casing, a

7B. another perspective view of a jacket frame formed on a roller drum,

7C. Fig. 4A is a cross-sectional view of an expanded and toroidal shell;

7D. Figure 4a is a sectional view of a tire made with a casing;

8A. Fig. 4A is a device for forming and assembling a saddle-less casing,

8B. Fig. 4A is a device for forming and assembling a saddle frame with a saddle.

First, in order to better understand the invention, the terms used herein are defined.

By "axial" is meant a line or direction that is parallel to the axis of rotation of the jacket.

By "inner liner" is meant the layer (s) of elastomeric or other material forming the inner surface of a tubeless tire, which contains the inflation medium within the tire.

"Equatorial plane (EP)" means a plane perpendicular to the axis of rotation of the tire and passing through the center of its tread.

"Yarn insertion structure" or "stiffener yarns" are fabricated from at least two parallel layers of woven or nonwoven, annular textile fabric or textile insert which are located below the heating surface and are not fixed to the mantle flange and have both left and right cantilever angles relative to 17 ° to 27 °.

"Heating surface" means a rubber component which, when fitted to the tire casing, forms the part of the tire that comes into contact with the roadway when the tire is inflated and under normal load.

"Width of the heating surface" means the arcuate length of the surface of the heating surface which is parallel to the axis of rotation of the tire.

The "rubber shoulder strap" is an elastomeric stiffener located in the shoulder frame.

'Casing' means the unvulcanised ply material of a tire liner and other tire cut to length in a suitable fit or in a cylindrical or toroidal shape. Additional components may be added to the casing before it is vulcanized to form a pressed tire.

By "circumferential" is meant a line or direction which is perpendicular to the circumference of the annular heating surface.

"Cord yarn" is one of the reinforcing yarn strands which constitute the textile inlay of the tire.

"Tire rim" is that part of the tire which has an elongated ring-shaped stretching part which is covered with textile cord cords and is designed to be fitted with other stiffening elements such as cord 3.

EN 218 199 Β fits in with the designed tire soles, without saddles, sole supports, and lap belts - or other bracing elements.

'Tire height' means the radial distance between the nominal diameter of the outsole and the outer diameter of the tire in the plane of the tire flattening.

'Width of the tire section' means the maximum linear distance between the tire's geometric axis and the outside of the sidewalls of the tire when and after having been inflated for 24 hours but not loaded, excluding markings, trim or protective flaps on the sidewalls. .

The "saddle" is an elastomeric filler placed radially over the skirt edge, which is inserted between the textile inserts and the recycled portion of the textile inserts.

"Sidewall" means the part of the tire between the tread and the bead.

"Pampering belts" are narrow strips of material around the outside of the rim that protect the textile inserts from the tire sole, distribute the folding over the tire sole, and seal the tire.

"Radial" means direction in or out of the tire's axis of rotation.

"Radial ply tire" is an inflatable tire that has a stiffened or circumferential inflatable tire in which the ply cords extend from 65 to 90 ° to the flange of the tire.

"Textile insert" is a continuous layer of rubber-coated parallel cord yarn.

"Shoulder" means the upper part of the sidewall just below the edge of the tread.

Figures 1, 2 and 3 show the semi-finished product according to the invention. The semi-finished product is a casing 10 for an inflatable tire 100.

Figure 1 shows the semi-finished product, the casing 10. As shown, the casing 10 is a flat-layered composite structure having a first and a second longitudinal end of a plurality of components. As can be seen, all the components are sheets or strips of material of substantially the same length. Each of the components depicted is positioned laterally with respect to one another.

Made with the jacket assembly assembly 200 and shown in FIG. or 8B. 10A, the laminate material or casing material 10A can be wound into continuous rolls 210. Preferably, the laminate 10A or casing material is then stored in pre-assembled state in large rolls 210 pre-cut, which are cut to exact length L at the jacketing station with a unique cutting device. The casing 10 cut to length L is then shaped into a cylinder as described later in this application.

Figure 1 shows a textile insert 20 reinforced with parallel cord yarns 22 encased in unvulcanized rubber. The cord yarns 22 are oriented at an angle of 65 ° to 90 ° with respect to the length L. An angle of 90 ° is preferably applied to the cord ribs of a tire having only one textile insert from the bead to the bead. The textile insert 20 has a width Wp of length L (see Figures 2A and 2B). The textile insert 20 has two recessed portions 26 disposed on the lateral edges of the textile insert 20. A pair of saddles 30 are attached to one of the outer sides 21 of the textile insert 20. The saddles 30 are located on the textile insert 20 in the vicinity of the recycled portion 26 and are positioned so as to subsequently wrap a skirt at an assembly station and preferably over the skirt. The extensible member used in the skirt flange is preferably a wire flange type skirt.

A pair of binder strips 40 is connected axially inwardly of the saddle 30 to an inner side 23 of the textile insert 20. The binder strip 40 serves as a rubber stiffener on the shoulder portion 27 of the casing 10.

A lining component 50 is connected to the textile insert 20 above the binder strips 40 of the shoulder portion 27. The liner component 50 is an air impermeable barrier to the radially inner air chamber of tubeless tires. The linings are usually made of halobutyl rubber. The liner 50 has an axial width less than the textile insert 20. The width of the liner 50 is sufficient to pass axially outwardly through the bead flanges when forming the tire, when the tire is formed into a toroidal form, thereby forming an airtight chamber between the tire 100 and the wheel when assembled.

The liner 50 is provided with a lateral belt 60 at each of its lateral sides, the liner glass 51, 52. The webbing belt 60 is attached to the lining 50 and to the inner side 23 of the textile insert 20 and slightly overlaps the sidewall component 70. The seat belt 60 is axially disposed so as to form a tight rubber stiffener between the tire 100 and the wheel rim. Accordingly, the webbing belt 60 is disposed within the bead section of the finished tire.

As shown in Figure 1, the sidewall component 70 is attached to the textile insert 20 and extends laterally outwardly from the side edges 29 of the textile insert. The side walls 70 are partially overlapped by the shoulder belts 60.

As an option, to form a tire with a white outline or a white tire, a white strip 80 and a cover strip 90 may be added to the casing material 10A or casing material as shown in FIG. 8A. and 8B. is shown. Note that, since the casing assembly equipment is not the subject of this application, detailed description thereof is omitted.

It is believed that in cases where a non-wire flange is used in the tire structure, it is advantageous to add the saddle at a later stage than this 8A. FIG. 4A is a view of the jacket assembly 200. This allows the 10A laminate or jacket frame material to be large without distorting the high profile extruded saddle components.

HU 218 199 Β

It is wound into 210 rolls. Alternatively, in cases where a saddle and a wire flange are used, 8B may be preferred. The jacket assembly assembly 200 of FIG. 2A is connected to one or more jacketing machines. In this case, the laminate material 10A or casing material does not need to be wound onto a coil body. This allows the saddle of the jacket frame 10 to be manufactured without distortion that may be caused by handling and storage.

The above description of the casing 10 includes all elastomeric components required to form the casing 10 of the tubeless tire. This is, in our opinion, the best way to carry out the present invention as it is the most efficient method for producing such a casing. As mentioned earlier, the tire engineer can choose another version. Accordingly, the saddles 30 will be added at a later stage of construction. This facilitates the use of sheath flanges of various structures, such as hexagonal or ribbon flange flanges.

In addition, within the scope of the invention, the semi-finished product may be constructed to include a textile insert 20 and at least two components selected from the group of components described above, each of which has a unique fitting feature, as will be described later.

2A. 2B and 2B. 1 to 4, the first frame end 12 and the second frame end 14 of the jacket frame 10 are shown, prior to forming into cylindrical form and joining the connecting frame ends 12, 14. Both ends 12 and 14 are cut along a substantially straight line substantially axial or lateral to the cord 22 of the textile insert 20. The cutting surfaces or the ends 12, 14 of the cord yarns 22 differ slightly from the plane P. This small deviation occurs when the cutting element is tilted slightly so that it passes through the cord yarns 22 without damaging them. The substantially straight cut forms a first frame end or surface portion 12 and a second surface portion. As best described in Figures 3-6. 2A, the two surface portions are inclined at an angle kisebb of less than 90 ° with respect to a normal NP plane which is perpendicular to the textile insert 20 and substantially parallel to the cord 22 in the textile insert 20. In order to have sufficiently large surfaces for fitting at the frame end 12, 14, it is desirable that the angle Θ be about 80 °. Some tires were constructed with a 82 ° Θ cut casing. This high angle of inclination provides a large adhesive surface area when the two frame ends 12 and 14 are assembled on a jacket-forming drum 5 as shown in FIG. 7A. is shown. 7A. It is further shown that the cut end 12, 14 has fine ribs 81 or ridges 81 and grooves 82 or trenches 82 formed during the cutting of the plywood material or sheath material. It is believed that these smeared surfaces further improve the adhesion of the joint.

The casing 10 is illustrated in FIG. FIG. 6B shows a wrapped drum 5 in a twisted state. A portion of the casing 10 is depicted in a pre-assembly state. The frame ends 12 and 14 have two inclined, substantially planar surfaces which fall in planes P. The body ends 12 and 14 are joined along the plane P as shown in FIG. 7B. is shown.

Figures 5 and 6 show the assembly of the jacket frame after being cut to length and wrapped around a cylindrical jacketing drum. Although the first end portions 12 and the second end portions 14 have almost the same fitting surface, it has been found empirically that the fitting of the shell 10 slightly overlaps, as shown in magnification in FIG. The preferred overlap is such that at least one cord 22 will fit radially, and preferably two cord 22 will also fit. This feature, together with the oblique surface of the body end 12, 14, allows the body 10 to extend at the point of expansion during expansion. As a result, the overlapping cord yarns 22 retract and evenly match the cord yarns 22 remaining in the textile insert 20. After vulcanization, the tires of the present invention should be inspected by X-ray, ultrasound, or polished to the cords 22 in the textile insert so that the fitting of the textile insert 20 can be visually detected. The assembly cannot be found by practically experienced professionals. The cord yarns 22 are evenly spaced, and the jacket frame 10 appears to be unmounted in all respects.

7C. Fig. 6A shows a cross-section of the jacket frame after expansion to a toroidal shape. Prior to expanding the jacket frame, the annular skirt flanges 120 are placed over the cylindrical jacket body, and the recycled ends 26 and sidewalls 21, 23 are rolled onto the jacket flange core and secured to the textile insert 20. The shell 10 is then expanded to a toroidal shape as shown.

7D. Figure 4a shows a cross-section of the finished tire. The finished, assembled and vulcanized tire 100 consists of a carcass 10, a textile reinforcement 110, an annular rim 120 and a tread 130. The casing 10 has a common joint. Occasionally, due to the fact that the fabric material of the textile insert 20 itself has a finite length, an additional textile insert interlacing may be provided in the casing 10. It is desirable to ensure that the casing 10, the additional textile inserts (if required), the reinforcing textile inserts 110, and the tread 130 are joined at a certain distance to each other during construction of the finished tire.

The invention described above not only enables more efficient manufacture of the tires, but also makes the tires much smoother and more durable.

The rupture strength of a tire 100 constructed in accordance with the present invention was compared with the rupture strength of a conventionally constructed tire of the same structure. The average tire fracture toughness of the test tires was higher than that of conventionally constructed tires. Otherwise, under the same conditions, the jacket frame 10 of the present invention is believed to be firmer.

HU 218 199 Β

Evenness! studies have shown that the tires 100 according to the invention exhibited improved traction and vibration behavior.

The radial inflatable tire 100 of the present invention is a toroidal tire having a tread 130 and at least two reinforcing textile inserts 110. In the reinforcing textile insert 110, the cord angles are oriented opposite to the plane of the tire 100. The reinforcing textile inserts 110 are oriented at an angle of 17 ° to 30 °. The tire casing 10 of the tire 100 comprises at least one textile insert having radial cord yarns and other casing members. The textile insert and at least two, preferably all, of these casing members are assembled along one surface or plane when the casing 10 is constructed as a semi-finished product. It is preferred that the additional textile inserts and the respective joined ends of the tread be circumferentially spaced from the joint of the jacket 10.

It has been found that in the construction of radial-ply tire tires, in multi-ply tire structures, the angles of the adjacent textile pads must be oriented opposite to the equatorial plane. If a second or more textile inserts are required for tire production, it is believed that additional textile inserts may be added to the casing in a separate operation at the tire forming station. In many tires, especially those reinforced with steel cord yarns, only one textile insert is required to produce the finished 100 tire. In these cases, the casing 10 may be stiffened by the casing flange cores 120, a stiffening textile insert 110 and a tread 130 for a complete tire 100.

Claims (9)

PATENT CLAIMS An unvulcanized tire casing as a semi-finished tire for an inflatable tire with radial textile inlays consisting essentially of toroidal plywood beads, treads, reinforcing yarn pads, characterized in that the casing (10 and 2) has a rim (10) of a textile insert embedded in an unvulcanized rubber (24) reinforced with cord yarns (22) having a length (L) defined by the distance between the ends (12, 14) of which the cord (22) has an angle of 65 ° to 90 ° lock me in, - at least two comprising one or more saddles (30) attached to the textile insert (20), a webbing (60), a lining (50), a sidewall (70), a white-walled strip (80), a support strip (90) and a binder strip (40), consisting of laminated components which are interlocked, and - the textile insert (20) and its components have common frame ends (12, 14), and the frame ends (12,14) are joined along a plane (P) substantially parallel to the axial width (W) of the article and the cord (22) of the textile insert. . Casing according to claim 1, characterized in that the plane (P) passes through the textile insert at an angle (?) Parallel to the cord yarn, wherein the plane (P) is less than 90 ° to the normal plane (NP) perpendicular to the textile insert. and at an angle (Θ) greater than 60 °. Sheath frame according to claim 2, characterized in that the angle Θ is 80 °. The jacket frame according to claim 1, characterized in that the components connected to the textile insert (20) comprise a lining (50) and two sidewalls (70). An inflatable tire in the form of a radial textile insert with a toroidal shape having a tread and at least two textile inserts, the cords of the textile inserts being formed at an angle of at least 17 ° to 30 ° with respect to the tire's equatorial plane, characterized in that consisting of a textile insert (20) having radially oriented cord yarns (22) and other casing members, the casing is formed by assembling the textile casing (20) and at least two casing members along a single surface or plane. Radial tire according to Claim 5, characterized in that the casing frame (10) has a defined width (Wp) and two frame ends (12, 14) and a length (L) defined by the distance between the frame ends (12, 14). a web insert (20) made of unvulcanized rubber (24), reinforced with cord yarns (22), the textile insert (20) having an angle of 65 ° to 90 ° with the longitudinal direction of the textile insert (20), - having at least two tablecloths made of one or more saddles (30), a cushion belt (60), a lining (50), a sidewall (70), a white-walled strip (80), a cover strip (90) and a binder strip (40), - the textile insert and the laminated component thereof being formed by common frame ends (12, 14) which are joined along the axial width of the article and substantially parallel to the ribs (22) of the textile insert (20). Radial tire according to claim 6, characterized in that the plane (P) is inclined at an angle © © through the textile insert (20), parallel to the cord yarn (22) and perpendicular to the textile insert (20), and the angle Θ is less than 90 ° and greater than 60 °. 8. The radial tire of claim 7, wherein the angle? Is 80 °. Radial tire according to Claim 6, characterized in that the components connected to the textile insert (20) are formed of a lining (50) and two sidewalls (70).