Reinforcing material layer for pneumatic tire, method of manufacture of said layer and method of manufacture of pneumatic tire

FIELD: automotive industry; tire industry.

SUBSTANCE: reinforcing members of reinforcing material layer are provided with separate coating made of rubber mixture of preset composition and physical properties. Reinforcing members arranged parallel to each other are coated at one side with first rubber layer or so-called first lining layer featuring constant composition and properties, while on opposite side, members are coated with second lining rubber layer of composition and properties changing as a function of meridional position on said layer in pneumatic tire.

EFFECT: increased strength of tire.

29 cl, 5 dwg

 

The present invention relates to a reinforcing layer for a pneumatic tire, as well as a pneumatic tire using, as a reinforcement layer. In addition, this invention relates to a method of manufacturing such a layer, and a method of manufacturing a pneumatic tire, which uses the above-mentioned layer.

Reinforcing layer for a pneumatic tire formed of reinforcing elements, which are usually covered on either side by layers of rubber mixture of the so-called cladding layers or layers calendering, so that these elements could not be in direct contact with the external environment. For these purposes usually use the same rubber mixture having the same composition and constant properties.

However, in some cases, it appears highly desirable that the same layer has been facing a mix depending on the localization layer in the pneumatic tire, in which this layer is used, whether the layer of reinforcement of the frame, the layer of reinforcement ridge or any other reinforcing layer. In accordance with the patent FR 2351810 fittings ridge with several layers of reinforcing elements parallel to each other in each layer and crossed from one layer to another, to raise the Oia life of this pneumatic tyres must have different characteristics in its Central zone and in their marginal zones. According to the mentioned document, a pneumatic tire containing the valve casing and the valve of crest, consisting of several layers, characterized in that the cladding rubber compound reinforcement layers of the comb has a modulus of elasticity in tension at a relative elongation of 100%, greater than 70 kg/cm2in the middle zone of the valve of the ridge, and this area is determined by the ratio of the width mentioned zone to the total width of the reinforcement of the ridge, and also the fact that facing the rubber mixture of the same layer has a modulus of elasticity in tension at a relative elongation of 100% less than 40 kg/cm2the remaining two edge zones of this valve crest.

Patent FR 1331934 relates to pneumatic tires with radial reinforcement of the frame, and the invention consists in providing additional stiffness in the lower part of the sidewalls, giving these side walls is slightly less rigid than it allows commonly used technical solution, i.e. the overlay in the lateral direction intersecting cord yarns on the radial reinforcement frame. The achievement of this goal increase the rigidity of the side walls in the area enclosed between the Board and essentially half the height of the sidewall by at least one layer of longitudinal reinforcing elements embedded in the facing mixture of the valve frame. One is C describes ways to implement the valve frame formed of a single layer of metal radial cord yarns or wires, wrapped around the side of the ring and pinned to this Board, and these cord thread or wire covered in the area enclosed between the Board and essentially the middle of the sidewall, facing layers of rubber compound, the elastic modulus which is not less than 350 g/mm2moreover , this module has a higher value compared to the modulus of elasticity for the rest of the facing mixture.

Patent document FR 2075851 recalls that in some pneumatic tire with radial reinforcement frame choice of rubber for communication between the supporting elements is a main factor determining the occurrence or absence of certain defects after this motion pneumatic tyres. So, the choice of binder rubber with a low value of the modulus of elasticity contributes to the separation of the cord threads of the valve frame at the end of the reverse side of this valve, in the sides and in the zones of the sidewalls adjacent to the sides, especially for the reinforcement layer frame, which has a high turnover in the sidewalls. At the same time, the choice of binder rubber with a high value of the modulus of elasticity helps to break this binding rubber cord between the threads of the valve frame along radial lines in the upper zone of the side walls.

For best results in the patent FR 2075851 serves, in particular, to a pneumatic tire with radial the second valve frame, cover cord thread made from a relatively elastic material, a rubber mixture coating

with a relatively high value of the modulus of elasticity, and cord thread separated intermediate rubber mixture, which is characterized by a relatively low value of modulus of elasticity in the upper zone of the side walls and a relatively high value of the modulus of elasticity in the lower zone of these sides, and in this case, the layer covering the rubber mixture layer and the intermediate rubber mixture have the same value of the modulus of elasticity in said lower zone. As for the method, designed to ensure that in the upper zone of the sidewalls of the rubber cover cord yarns and the intermediate rubber cord between threads in the same layer had different properties if these properties are identical in the lower zone of these sides, it is in the process of making this pneumatic tire, in the radial direction from the inside of the layer of cord yarns, coated with a layer of rubber of the first quality layer of rubber of the second quality, and, in the process of vulcanization of this pneumatic tire, in the implementation of pull cord yarns of the reinforcement frame.

For any of the known and the preceding technical solutions and as for the valve cage and the valve of the ridge, the methods used to obtain the above-described reinforcing layer, do not allow as numerous dispersion affect the quality of the semifinished product, which is the layer in not volcanoserver.com condition to obtain the optimal structure mentioned layer, given the fact that this layer is used in the valve cage or valve of the ridge, and even less able to ensure its effective use in the process of manufacturing pneumatic tires.

The task of the invention is to eliminate the above-mentioned disadvantages. The present invention proposes a pneumatic tire having at least one reinforcing layer formed by the supporting elements, immersed in vulkanisierung rubber compound, characterized in that the reinforcing elements of the layer has an individual coating of the so-called covering rubber mixture having a given composition and physical properties, with reinforcing elements arranged parallel to each other, covered on one side of the first rubber layer or so-called first cladding layer having a constant composition and properties, while at its opposite side elements are covered with the second cladding rubber layer having the composition and properties varying as a function of the meridional position e is ω reinforcing layer in this pneumatic tire.

The composition and properties of the first cladding layer can be identical to the composition and properties of the mixture coating the reinforcing elements. However, the preferred, the composition and properties of this first layer will differ from the composition and properties of the mixture coating.

Reinforcing layer may be a layer of reinforcement of the frame, for example, radial reinforcing elements which may be metal and/or textile. In this case, the meridional position is calculated on the meridional length of the layer.

Reinforcing layer may be a layer of reinforcement ridge formed by, for example, reinforcing elements parallel to each other in the above-mentioned layer and forming with the circumferential direction of this pneumatic tyres some acute angle, or educated by the district elements. Thus, the meridional position is measured on the axial width of the layer.

It can also represent any other reinforcing layer used usually, or often, in the pneumatic tire, for example layers of the reinforcement Board or layers of reinforcement sidewalls. In this case, the meridional position can be likened to a radial height.

Method of manufacturing vulcanized reinforcing layer required to obtain a layer in accordance with the proposed the first invention as an intermediate product, is the manufacturer in the first stage, the intermediate product or the so-called “coated on one side of the layer obtained by individual cover many of the reinforcing elements to rubber mixture using an extruder with multiple nozzles and subsequent sequencing, using specially adapted for that purpose, these reinforcing elements that already have coverage, along parallel lines, maintaining between two adjacent elements a certain distance.

After that one of the parties thus obtained system with floor elements provided with first non-vulcanised cladding layer, also called the base layer, by introducing a cap layer in contact with the system elements.

Introduction to the contact cap layer system having a coating of the reinforcing elements can be done either by simple styling of this system to the facing layer, or by simply laying cladding layer in this system of reinforcing elements, but in both these cases, the preferred way with the application of a small pressure to one or both of the input in the contact components, which in this case is the system of the reinforcing elements and cladding layer.

Mentioned uncured “faced with on the side of the layer can be used with reinforcing elements, with individual coverage, which is implemented based or not vulcanized or pre-vulcanized rubber mixture. The method pertaining to the second possibility includes an additional step consisting in pre-vulcanization at a given temperature of the mixture coating using a suitable means of heating.

Continuously formed “coated on one side of the layer is known, it may be wound on itself through the introduction of a cushioning layer, made of, for example, or from a fabric or polyethylene, and is used to prevent sticking, with the aim of forming rolls “coated on one side of the layer. These rolls serve to feed on the technological style of cooking casing plies or layers of the ridge.

As is known, the preparation layer of the framework requires cutting of the layer of reinforcing elements perpendicular to their common direction, thus to obtain the desired longitudinal length, then as a preparation layer of the ridge requires cutting of the layer of reinforcing elements at a certain angle and splicing received portions of the layer to get the layer of the ridge at the desired circumferential length.

Manufacturing a reinforcing layer, intended for use in the pneumatic tire, supplemented and sewershed is added on the second side of the mentioned coated on one side of the layer having a floor and cut accordingly reinforcing elements of the second cladding layer, this second cladding layer has a volatile composition and changing properties.

Mentioned adding can be done in several different ways:

or by bringing into contact “coated on one side of the layer after cutting with the second cladding layer, the composition and properties of which vary in function of the longitudinal position and which is formed in advance, for example, on hardware that is independent of the cores or reels Assembly and/or finishing is not vulcanized billet valve frame and/or pneumatic tires (for example, on the table cooking layers), and the operation of introducing into contact can be realized either by stacking “coated on one side of the layer on the second cladding layer or by stacking the second cladding layer on the appropriate side, where you see has an individual coating of the reinforcing elements of this “coated on one side of the layer, and the second cladding layer can be made in the form of strips of rubber mixtures with different composition and properties from one page to the other, adjoining in the axial direction of the strip, or in the form of a single layer, in which the transition from one part of the strip to the other part of this band is a gradual manner and/or continuous clicks the zoom;

any preferred way, by bringing into contact “coated on one side of the layer after cutting with the second cladding layer having the composition and properties varying as a function of longitudinal position, and cooked on the equipment used for Assembly and/or finishing is not vulcanized billet valve frame and/or pneumatic tires (cylindrical drum Assembly billet valve frame, the drum of the finishing of the workpiece pneumatic tyres, made in the shape of a torus), and the introduction of the contact can be carried out either by stacking the other side “coated on one side of the layer, where visible has an individual coating of the reinforcing elements on the second cladding layer, originally located on not vulcanized to the workpiece during the manufacturing process, or by stacking the second cladding layer on the “coated on one side of the layer, pre-placed on the workpiece during the manufacturing process, and the second cladding layer can be presented in the two above-mentioned forms.

Other characteristics and advantages of the invention will be better understood from the following description of non-restrictive examples of its implementation, where references are given in Appendix figures, the Redi:

- Figure 1 is a schematic view in longitudinal section of a pneumatic tire containing layers of the ridge and the carcass layer in accordance with a variant implementation of the invention;

- Figure 2 represents a schematic view in section along the line a-a shown in Fig 1;

- Figure 3 is a schematic view in section along the line B-B, shown in figure 1;

- Figure 4 represents a schematic view in longitudinal section of the valve of the ridge, formed of two layers;

- Figure 5 is a schematic view of the different stages of producing coated on one side of the layer.

Pneumatic tyre, schematically depicted in figure 1, is a pneumatic tire of the type “Poids-Lourds” (that is, the pneumatic tire designed for use on heavy vehicles or road-building machines) relatively small size 9.00/20X.

This pneumatic tire includes a radial valve frame formed of a single layer 1 of the reinforcing elements, in this case a layer of inextensible metal cord threads are fixed in each side of the annular reinforcement element side, in this case, the side ring 2 to form a turnover of 10.

On top of the valve frame in the radial direction is located the Armat is and ridge 3, formed, on the one hand, the two working layers of the ridge 31, 32, formed of inextensible metal cord threads, parallel to each other in each layer and crossed from one layer 31 to the other layer 32, forming with the circumferential direction angles, the value of which lies in the range from 10 to 45°and in the example considered here the implementation is respectively 26 and 18°and, on the other hand, from the outside in the radial direction, one layer of metallic elastic cord yarns oriented in relation to the district the same direction angle as the angle of orientation of the cord threads of the working layer of the ridge 32, the most outside in the radial direction.

Fittings ridge 3 in the radial direction is connected to the fitting frame 1 by means of a layer 8 of rubber mixture having a constant thickness in its Central part and increasing in thickness as it approaches the edges of the reinforcement ridge 3.

On top of this fixture ridge 3 in the radial direction is located treadmill tread 9, connected on either side of the Equatorial plane of this pneumatic tire rubber mixture sidewall 7, covering the sidewall of this pneumatic tire valve frame 1 and providing the mate, on the one hand, with mixes 40, 41, 42, supporting the Board, and on the other the hand, with a mixture of 11 protecting the Board and its contact with a mounting rim.

The inner layer of the coating 5 of the cavity of the pneumatic tire and various rubber reinforcing elements between the said layer and the reinforcement frame complements the structure of this pneumatic tyres.

Layer 1 of the valve frame in the example considered here the implementation of the established made of steel inextensible metal cord threads having a coating of rubber compound In which structure is adapted so that the said mixture in volcanoserver.com condition perfectly meshed with a thin layer of brass, covering steel, which are made of the reinforcing cord thread.

Mentioned cord thread having a coating of rubber mixture In lined throughout its longitudinal length of the outer side of the layer 1 frame, including momentum reinforcement layer frame, a layer of rubber mixture a, that is, the first cladding layer or reference layer, because we are talking about the layer on which or under which are cord thread reinforcement layer, stacked in the process of producing coated on one side of the layer.

As for the inner cladding layer for layer 1 reinforcement of the frame, which is the second cladding layer, it is formed by several circumferential bands is mi or layers of rubber mixtures having the composition and properties different from one lane to the next, and the composition and properties of one strip are selected in accordance with the meridional position of this band in the meridional length of the frame.

For point T on-Board ring 2 that is closest in the radial direction to the axis of rotation to the point S of intersection between the Central axis of the meridional profile of the reinforcement layer frame 1 and perpendicular to this profile, is omitted from the end of the turnover of the 10 layer 1, and the area TS is a so-called bead area, the facing layer is formed of the first strip S1 rubber mixture.

On the way from point T to point R representing the end of the turnover of the 10 layers of the frame 1, and this area TR is called the zone of circulation, a facing layer formed With the second strip S2 rubber mixture (figure 2 schematically presents the different layers, which are located in the bead area of this pneumatic tires).

For between the point S and the point V is the intersection of the center line of the meridional profile of the reinforcement layer frame 1 with the straight line parallel to the Equatorial plane and spaced from this plane at a distance, the value of which can be made in the range from 30% to 45% of the axial width of the tread 9 and in the example considered here the implementation is 35% of the axial ø the doctrine of the tread, moreover, this area SV is called the zone of the sidewall and shoulder, facing layer formed of the third stripe C3 rubber mixture.

For reinforcement of the frame between the point V and the Equatorial plane XX’, forming the so-called zone of the ridge, the fourth band C4 rubber mixture forms a cladding layer C.

In the example implementation, schematically illustrated in Fig.1-3, layers or strips a, b, C1, C2 and C4 are formed of the same rubber mixture, which in volcanoserver.com state has a secant modulus of elasticity in tension, measured at a relative elongation ε0.1 (defined in this way, the elastic modulus is normalized in accordance with standard AFNOR-NF-T46-002 in normal conditions the temperature and humidity of the environment in accordance with standard AFNOR-NF-T40-101, and this value later to be simplify referred to as the module), has a value in the range from 6 MPa to 12 MPa, while the rubber compound cap layer C3 for part of the bed frame 1, which is located in the zone of the sidewall and shoulder, is a rubber compound, a module of the same name which, measured in the same conditions, is definitely a smaller value, because its value lies in the range from 3.5 MPa to 5 MPa.

The first of the above-mentioned rubber mixtures in n volcanoserver.com state has a sufficiently high plasticity Mooney, the value of which lies in the range from 60 Mooney units to 90 units Mooney, while the rubber compound layer C3 has a lower ductility of the same name, because its value lies in the range from 55 Mooney units to 75 units Mooney plasticity of the rubber Mooney is measured in accordance with standard AFNOR-NF-T43-005).

For pneumatic tyres of a different size and functions of violations of the resistance encountered in the pneumatic tire this size, the layer of the coating is made of a rubber mixture with a very high modulus having a value in the range of 27 MPa to 45 MPa, and with a very high plasticity Mooney, having a value in the range from 70 Mooney units to 100 units Mooney, whereas the mentioned support layer And is made of a rubber mixture with a somewhat lower value of modulus of elasticity than the previous rubber mixture, but, nevertheless, a sufficiently high value, because here the modulus of elasticity has a value in the range from 10 MPa to 15 MPa, and with a sufficiently high plasticity Mooney, having a value in the range from 60 Mooney units to 90 units Mooney.

Layer C1 there will be formed of the same rubber mixture, and layer A. layer But C2 will be a strip of rubber compound having a low value of modulus of elasticity, because its value is in the range from 3.5 the PA to 5 MPa, slightly lower Mooney plasticity, the value of which lies in the range from 55 Mooney units to 75 units Mooney.

If this is the same rubber mixture to form a band C3, whereas the layer C4 will be implemented from a rubber mixture having an intermediate value of the modulus of elasticity, the value of which in this case lies in the range from 6 MPa to 12 MPa, and plasticity, the value of which lies in the range from 60 Mooney units to 90 units Mooney.

Another favorable technical solution consists in choosing as the rubber mixture for the layer As a mixture with a low value of the modulus of elasticity in volcanoserver.com condition and in use supporting layer as the inner lining layer of the frame 1, and the layers’1, C’3 and C’4 is formed with a layer’ of the outer lining of this layer of frame 1.

This rubber compound layer will be identical to the rubber mixture from the previous example implementation and the rubber compound layer And will be a rubber compound forming the layer C2 in the previous example, implement and having a modulus of elasticity, the value of which lies in the range from 3.5 MPa to 5 MPa and ductility has a value in the range from 55 Mooney units to 75 units Mooney.

From the point U turnover reinforcement layer frame, which is located in the radial direction essentially at Polo is ine height turnover 10, to the point S, defined in the preceding statement, and passing under the tail ring 2, the strip’1 is formed of a rubber mixture with a high value of the modulus of elasticity, the value of which lies in the range from 10 MPa to 15 MPa, and high ductility, the value of which lies in the range from 60 Mooney units to 90 units Mooney, whereas from the point U to the point R of the end of the turnover of the 10 lane’2 is formed of the same rubber mixture, and the rubber compound, forming a support layer A.

Similarly is the case for the layer’3 in the area from point S to point V, whereas the layer’4 is formed of the same rubber mixture as the mixture, forming a layer of C4 in the above-described example implementation.

Outside the scope of the present invention is not released and the case where the layer, regardless of whether he / she appears as an internal or external cladding layer, formed by winding strips of rubber mixtures, the composition and properties of which are changed in a continuous manner, and/or the transition from one composition of the rubber mixture in the same zone reinforcement layer frame to a different composition of the rubber mixture adjacent to another zone of this layer is a gradual manner (e.g., the transition from the rubber mix forming the layer C3, the rubber mix forming the layer C4).

When this strip forming layer is in a known manner can be obtained by kneading and/or mixing apparatus of the grinding and mixing of one or two types of rubber granules (in the example considered here the realization of mixing pellets of the two rubber mixtures forming layers C3 and C4).

This machine grinding and mixing when it is powered from the several bins, each of which contains a rubber mixture of a given composition and properties in the form of granules, and the required properties of the obtained mixture is provided by opening the chutes power of these bunkers, controlled by valve power control, which allows to obtain the transition zone between layers C3 and C4, where the rubber compound forming the layer C3, gradually changes its composition in order to eventually turn into a rubber compound, forming a layer C4.

Figure 4 shows schematically the working valves of the ridge 3, formed by two layers 31 and 32. Working layer 31 of this reinforcement of the ridge closest to the radial direction to the axis of rotation of this pneumatic tire is formed by a set made of steel metal cord threads with individual coating of rubber compound B1, which in the example considered here the implementation has a very high value of modulus of elasticity in tension, because its value lies in the range from 15 MPa to 30 MPa, and an equally high plasticity Mooney, having a value in the range from 65 units Mooney to 95 units Mooney.

Inside in the radial direction is located in the first cladding layer or support layer A1, educated IU the Noah rubber mixture, the composition and properties of which are identical composition and properties of the rubber compound coating B1.

Outside in the radial direction is located the second cladding layer D formed in several areas of rubber mixtures with different compositions and properties:

- Central area D1 having an axial width 1, the value of which lies in the range from 70% to 90% of the total axial width Ls for two working layers 31 and 32, formed of a rubber mixture with a relatively high modulus of elasticity, the value of which lies in the range from 15 MPa to 30 MPa and ductility, the value of which lies in the range from 65 units Mooney to 95 units Mooney, and this rubber compound is identical rubber mixtures, forming a support layer A1 and the coating layer cord yarns B1;

two sidebands D2, are identical in the example considered here the implementation and educated rubber mixture with a relatively low value of the modulus of elasticity, because its value lies in the range of from 3 MPa to 9 MPa, and the value of the Mooney plasticity enclosed in the range from 50 units Mooney to 85 units Mooney.

With regard to the working layer of the ridge 32, more remote in the radial direction from the axis of rotation of this pneumatic tyres than the working layer 31, and having an axial width smaller than that of the layer 31, it has a structure identical article is ucture this layer 31, but support layer A1 in this case is located in the radial direction from outside this layer, and three zones D1 and D2 of the layer D are arranged in the radial direction from the inside of said layer D so that the three zones of the layer 32 are positioned against the three zones of the first working layer 31, in particular, the lateral zone D2 rubber mixture with a relatively small value of the modulus of elasticity, which allows to significantly reduce the thickness of the rubber wedge 12, which is located between the two edges of the above-mentioned layers, and put them in the Assembly in the form of flat strips.

The manufacture of pneumatic tires in accordance with the proposed invention requires several preliminary steps before this vulcanization of pneumatic tires and, in particular, Assembly, or manufacture “coated on one side of the layer.

Figure 5 shows schematically the system of the coils 100, which wound metal cord thread intended for use as reinforcing elements in the underlying manufacturing a reinforcing layer.

A lot of these cord yarns are directed to the extruder 200, the working cylinder, which contains a number of nozzles adapted to cover the cord yarns layer, B1 rubber compound coating having a predetermined thickness.

the ATEM cord thread, already have the floor, go in the machine, in this case representing a roller with grooves 210, which provides the possibility of separating each cord thread from adjacent in the axial direction of the cord thread to the desired length or step, then these cord thread arrives at the calender 300 with two rollers 310 and 320.

While some amount of rubber mixture, which should form a support layer And, A1 coated on one side of the layer, pre-heated to a temperature that allows you to soften the mixture, but without the exercise of its vulcanization or pre-vulcanization, is introduced between the two rollers 310 and 320.

The passage of the softened rubber mixture between these two rollers results in flat strip of this rubber mixture, in contact with which is at the top in the radial direction of the upper roller 320 will be introduced with individual floor cord thread.

Auxiliary roller 330, or so-called pressure roller, allows you to attach, if necessary, a constant pressure on the cord thread, and this pressure is regulated in function of the desired depth of immersion of these cord yarns in a flat strip of rubber compound A.

Roller 340 provides the proper laying of the plug intermediate band, which provides pre is disgusted bonding and usually made of polyethylene, or on the surface where it is visible having individual coverage cord thread, or on the opposite surface, thereby to enable winding of the famous “coated on one side of the layer at the receiving roller 350, intended for subsequent supply of cutting machines and tables preparation of the reinforcing layers, and the reinforcing elements are arranged in the direction of the length of the layer.

As you know, is faced on one side of the layer, depending on whether the preparation of a panel for the layer frame or the preparation of a panel for the layer of the ridge, cut or perpendicular to the General direction of the reinforcing elements, or at some angle α in relation to the General direction of the reinforcing elements, which will be finally manufactured pneumatic tire to provide an orientation angle of these reinforcing elements with respect to the district direction of the pneumatic tire.

Then, the thus obtained cloth together and spliced or end-to-end, if we are talking about the metal reinforcing elements, or with some overlap one end to the other, if we are talking about the textile reinforcing elements. In the case of butt splicing such connection may be effected by adding the Oia small flat, the so-called connective layer of rubber mixture, placed on a joint or stacked on one of the joined edges, in order then to pass under the other end.

United thus the panels form a “coated on one side of the layer, ready for use, for example, by means of making partial and not vulcanized billet pneumatic tyres.

Full implementation layer frame is carried out, for example, by stacking “coated on one side of the layer at different layers of rubber mixes and the different layers of the reinforcement Board, previously placed on a cylindrical drum Assembly of a cylindrical billet frame, so that the support layer And located inside in the radial direction.

Visible reinforcing elements coated on one side of the layer” at the same time fit different circumferential layers C1, C2, C3, etc. required for the formation of the outer cladding layer, and mentioned layers not volcanoserver.com condition have a thickness selected so as to provide the desired thickness of these layers in volcanoserver.com condition, taking into account the impact on the workpiece reinforcement frame, ensuring the transformation of this cylindrical workpiece in the workpiece reinforcement frame of the doughnut is enoi form.

As the finishing layer of the reinforcement frame is implemented on a cylindrical drum Assembly, the subsequent Assembly steps are known and commonly used stages: laying bead rings fixing reinforcement layer frame, laying various rubber items populate the boards, rubber framing elements or other elements, the execution of the turnover of the edges of the reinforcement layer of the carcass around the bead rings and elements filling etc.

Implementation of a full layer of reinforcement ridge 31 also ends the same way, that is the drum production is not vulcanized billet pneumatic tyres: after laying on not vulkanisierung and already having a toroidal shape of the workpiece reinforcement frame different layers 8 rubber mixtures, separating in the radial direction of the valve frame 1 and the armature of the ridge 3, placed uncured “coated on one side of the layer formed of reinforcing elements has an individual coating of rubber

a mixture of B1, having a given composition and properties, and reinforcing elements arranged parallel among themselves, covered on one side of the first rubber layer A1 or support layer of constant composition and properties, and coated on one side of the layer is put into contact with the second oblitsevat the second layer D, having the composition and properties varying as a function of the axial width of the layer of the ridge 31 in this pneumatic tire.

With regard to the production of a working valve crest 3 with two layers 31 and 32, it is possible to put on layers 8 first coated on one side of the layer and support layer A1 coated on one side of the layer is located inside in the radial direction, and then visible reinforcing elements of the first coated on one side of the layer to fit the different layers of rubber mixes D1 and D2, forming a second cladding layer of the first layer of the ridge 31 that is located closest in the radial direction of the valve frame.

Fabrication of the second layer of the ridge 32 is carried out in the same way, however, it begins with the stacking of the layers D1 and D2, which are then covered in a radial direction of the second coated on one side of the layer situated so that the visible reinforcing elements of the second layer was in a radial direction from the inside of this layer. After that the usual and known way to continue the operation finishes and vulcanization toroidal billet this pneumatic tyres.

1. Pneumatic tire having at least one reinforcing layer (1, 31, 32)formed of reinforcing elements embedded in vulkanisierung to acucobol mixture, characterized in that the reinforcing elements mentioned layers have individual coverage of the so-called rubber compound coating (b, B1)having a given composition and physical properties, with reinforcing elements arranged parallel to each other, covered on one side of the first rubber layer (a, A1) or the so-called first cladding layer having a constant composition and properties, while at its opposite side elements are covered with the second cladding rubber layer (C, D)having the composition and properties varying as a function of longitudinal position on this layer in this pneumatic tire.

2. Pneumatic tire according to claim 1, characterized in that the composition and properties mentioned first layer (A1) are identical composition and properties of the rubber compound coating (b, B1) of the reinforcing elements of the layer.

3. Pneumatic tire according to claim 2, characterized in that the reinforcing layer is a layer (1) reinforcement of the frame.

4. Pneumatic tire according to claim 3, characterized in that the layer (1) armature armature in its main part on its outer side and wrapped his part at its inner axial side of the coated first layer And the constant composition and properties, while its opposite side is covered with the second ablezova the th layer, the composition and properties of which change in the function of the meridional length of the layer (1) in this pneumatic tire.

5. Pneumatic tire according to claim 4, characterized in that the mixture of the coating has the same composition and characteristics as the composition and characteristics of the first cladding layer And, moreover, the secant modulus of elasticity in tension for the mentioned mixture in volcanoserver.com condition, measured with a relative elongation at the level of 0.1, has a value in the range from 6 to 12 MPa, while the Mooney plasticity of the mixture in not volcanoserver.com condition has a value in the range from 60 Mooney units to 90 units Mooney.

6. Pneumatic tire according to claim 4, characterized in that the second layer is formed:

the first strip S1 rubber mixture, ranging from point T side rings (2), the closest in the radial direction to the axis of rotation to the point S of intersection between the Central axis in the meridional profile of the layer frame (1) and perpendicular to the profile, omitted from the end of the turn (10) layer (1), and this area TS is called the bead area,

the second strip S2 rubber mixture, ranging from point T to point R representing the end of the turn (10) layers of the frame (1), and area TR is called zone turnover

third stripe C3 rubber mixtures, which are located between the point S and the point V is the intersection of the middle axis measures dianalove profile layer frame (1) with a straight, parallel to the Equatorial plane and spaced from this plane at a distance, the value of which can be made in the range from 30 to 45% of the axial width of the tread (9), and area SV is called the zone of the sidewall and shoulder,

- fourth stripe C4 rubber mixtures, which are located between the point V and the Equatorial plane XX’, forming a so-called zone of the ridge, and strips C1, C2 and C4 are formed of the same rubber mixture, the modulus of elasticity which has a value in the range from 6 MPa to 12 MPa, and the Mooney plasticity which has a value in the range from 60 Mooney units to 90 units Mooney, whereas the band C3 is formed of a rubber mixture, the modulus of elasticity which has a value in the range from 3.5 to 5 MPa and a Mooney plasticity which has a value in the range 55 Mooney units to 75 units Mooney.

7. Pneumatic tire according to claim 2, characterized in that the reinforcing layer is a layer (31, 32) of the valve crest (3), formed of reinforcing elements parallel to each other in the above-mentioned layer and forming with the circumferential direction of this pneumatic tyres some acute angle, and the meridional position is measured on the axial width of the layer (31, 32).

8. Pneumatic tire according to claim 7, characterized in that it contains a reinforcement ridge (3), formed by at least two working layers ridge (31, 32), and layer (31), the closest in the radial direction to the valve frame, coated on its inner radial direction side of the first cladding rubber layer A1 with constant composition and properties and coated on its outer radial side of the second cladding rubber layer D, the composition and properties of which vary in function of the axial width of the mentioned layer (31), while the layer (32)that is positioned outside in the radial direction from the layer (31), coated on its outer radial direction side of the first cladding rubber layer A1 with constant composition and properties and coated on its inner radial direction side of the second cladding rubber layer D, the composition and properties of which vary in function of the axial width of this layer (32).

9. Pneumatic tire of claim 8, wherein the rubber mixture, forming, on the one hand, the first facing layer A1, and on the other hand, the mixture of the coating B1 reinforcing elements of the layer of the ridge (31, 32), has not volcanoserver.com state Mooney plasticity in the range from 65 units Mooney to 95 units Mooney and has volcanoserver.com condition measured at a relative elongation of 10% zechusim elastic modulus in tension in the range from 15 to 30 MPa.

10. Pneumatic tyre at p., wherein the second cladding layers D are formed by at least three zones, namely a Central zone D1 formed by a rubber mixture having volcanoserver.com state high modulus of tensile elasticity, the value of which lies in the range from 15 to 30 MPa, and has not volcanoserver.com state Mooney plasticity in the range from 65 units Mooney to 95 units Mooney, and two side zones D2 formed of a rubber mixture having volcanoserver.com state low value of the modulus of tensile elasticity, which is contained in the range from 3 to 9 MPa, and having not volcanoserver.com state-of-the Mooney plasticity, which is contained in the range from 50 units Mooney to 85 units Mooney.

11. Pneumatic tire according to claim 1, characterized in that the composition and properties of the first rubber compound (A1) are different from the structure and properties of rubber compound coating (b, B1) of the reinforcing elements of the layer.

12. A pneumatic tyre according to claim 11, characterized in that the reinforcing layer is a layer (1) reinforcement of the frame.

13. Pneumatic tire according to item 12, characterized in that the layer (1) armature armature in its main part on its outer side and wrapped his part at its inner axial side faced the first rubber mixture And with a constant composition and with what properties, while the opposite side of this layer is covered with the second cladding rubber layer, the composition and properties of which change in the function of the meridional length of this layer (1) in this pneumatic tire.

14. Pneumatic tire according to item 13, wherein the rubber compound coating in volcanoserver.com the state has a modulus of elasticity in the range from 27 to 45 MPa and has not volcanoserver.com state-of-the Mooney plasticity in the range from 70 Mooney units to 100 units Mooney, whereas the modulus of elasticity in volcanoserver.com the condition of the rubber mixture of the first cladding layer And has a value in the range from 10 to 15 MPa and has a Mooney plasticity in not volcanoserver.com condition in the range from 60 Mooney units to 90 units Mooney.

15. Pneumatic tire according to claim 4, characterized in that the second layer is formed

the first strip S1 rubber mixture, ranging from point T side rings (2), the closest in the radial direction to the axis of rotation to the point S of intersection between the Central axis in the meridional profile of the layer frame (1) and perpendicular to the profile, is omitted from the end of the turn (10) of this layer (1), and this area TS is called the bead area,

the second strip S2 rubber mixture, ranging from point T to point R representing the end of the turn (10) layers of the frame (1), and the area TR area turnover

third stripe C3 rubber mixtures, which are located between the point S and the point V is the intersection of the center line of the meridional profile of the layer frame (1) with the straight line parallel to the Equatorial plane and spaced from this plane at a distance, the value of which can be made in the range from 30 to 45% of the axial width of the tread (9), and the area SV area called sidewall and shoulder, fourth stripe C4 rubber mixtures, which are located between the point V and the Equatorial plane XX’, forming a so-called zone of the ridge, with bands of C2 and C3 are formed of one and the same rubber mixture, the modulus of elasticity which has a value in the range from 3.5 to 5 MPa and a Mooney plasticity which has a value in the range from 55 Mooney units to 75 units Mooney, whereas the strip S1 is formed of a rubber mixture, the modulus of elasticity which has a value in the range from 10 to 15 MPa and a Mooney plasticity which has a value in the range from 60 Mooney units to 90 units Mooney, and band C4 is formed of a rubber mixture, the modulus of elasticity which has a value in the range from 6 to 12 MPa and ductility Mooney has a value in the range from 60 Mooney units to 90 units Mooney.

16. Pneumatic tire according to item 12, characterized in that the layer (1) armature armature in its main part on its inner side and its about Motoi part on its outer axial side faced the first rubber mixture And with a constant composition and properties, while the opposite side of this layer is covered with the second cladding rubber layer’, the composition and properties of which change in the function of the meridional length of this layer (1) in this pneumatic tire.

17. Pneumatic tire according to item 16, wherein the rubber compound coating in volcanoserver.com the state has a modulus of elasticity in the range from 27 to 45 MPa and has not volcanoserver.com state-of-the Mooney plasticity in the range from 70 Mooney units to 100 units Mooney, whereas the modulus of elasticity in volcanoserver.com the condition of the rubber mixture of the first cladding layer And has a value in the range from 3.5 to 5 MPa and has a Mooney plasticity for the mentioned mixture And its not volcanoserver.com condition in the range from 55 Mooney units to 75 units Mooney.

18. Pneumatic tire according to claim 4, characterized in that the second layer is formed

the first strip With’1 rubber mixture, ranging from point U turn (10) layers of the frame (1), which is essentially half the height of turnover (10), to the point S of intersection between the Central axis in the meridional profile of the layer frame (1) and perpendicular to the profile, omitted from the end of the turn (10) layer (1),

the second strip With’2 rubber mixture, ranging from point U to point R representing the end of the turn (10) layers of the frame (1),

third stripe C3 to acucobol mixture, located between the point S and the point V is the intersection of the center line of the meridional profile of the layer frame (1) with the straight line parallel to the Equatorial plane and spaced from this plane at a distance, the value of which can be made in the range from 30 to 45% of the axial width of the tread (9), and the area SV area called sidewall and shoulder,

- fourth stripe C4 rubber mixtures, which are located between the point V and the Equatorial plane XX’, forming a so-called zone of the ridge, and bands With’2 and’3 are formed of the same rubber mixture, the modulus of elasticity which has a value in the range from 3.5 to 5 MPa and a Mooney plasticity which has a value in the range from 55 Mooney units to 75 units Mooney, whereas the band With’1 is formed of a rubber mixture, the modulus of elasticity which has a value in the range from 10 to 15 MPa and a Mooney plasticity which has value in the range from 60 Mooney units to 90 units Mooney, and strip’4 is formed of a rubber mixture, the modulus of elasticity which has a value in the range from 6 to 12 MPa and for which the Mooney plasticity has a value in the range from 60 Mooney units to 90 units Mooney.

19. Pneumatic tire according to claim 1, characterized in that the reinforcing layer is a layer of reinforcement ridge formed by the elements.

20. P is emotionsa tire according to claim 1, characterized in that the reinforcing layer is a layer of reinforcement Board.

21. Pneumatic tire according to claim 1, characterized in that the reinforcing layer is a layer of reinforcement sides.

22. A method of manufacturing a pneumatic tire according to any one of claim 3 or 12, comprising, at the first stage in the Assembly on the drum is not vulcanized cylindrical billet valve frame containing at least one layer of the carcass (1), characterized in that when assembling the layers of the frame (1), after laying on the cylindrical drum Assembly of a cylindrical billet valve frame different layers of rubber mixes and the different layers of the reinforcement Board, carry out the laying of the intermediate product, the so-called not vulcanized “coated on one side of the layer formed of reinforcing elements having individual coverage of the so-called rubber mixture coating that has a specified composition and specified physical properties, and reinforcing elements arranged parallel between a cover on one side of the first rubber layer And the so-called first cladding layer or a reference layer having a constant composition and properties, and is faced on one side of the layer is introduced into contact with the second cladding layer, the composition and properties to the which vary as a function of position in the meridional length of the layer (1) in this pneumatic tire.

23. The method according to item 22, wherein the uncured “coated on one side of the layer used with reinforcing elements having individual coverage from non-vulcanized rubber compound Century

24. The method according to item 23, wherein the uncured “coated on one side of the layer used with reinforcing elements has an individual coating of the rubber mixture In the pre-vulcanized at a given temperature by means of specially adapted heat.

25. The method according to any of PP-24, characterized in that the introduction of the contact is carried out by stacking various layers of rubber mixes and the different layers of the reinforcement Board covering the cylindrical drum Assembly of a cylindrical billet valve frame (1), “coated on one side of the layer having the coating of the reinforcing elements and laying on visible and having a floor supporting elements of this “coated on one side of the layer of the second cladding rubber layer having the composition and properties varying as a function of the meridional length of the layer (1) in this pneumatic tire.

26. The method according to any of PP-24, characterized in that the introduction of the contact is carried out by stacking various layers of rubber mixes and the different layers podkrepleni the Board, covering the cylindrical drum Assembly of a cylindrical billet valve frame, a second cladding layer having the composition and properties varying as a function of the meridional length of the layer (1) in this pneumatic tire, and laying on the second cladding layer coated on one side of the layer having the coating of the reinforcing elements, where elements are placed on the second layer C.

27. A method of manufacturing a pneumatic tire according to claim 7, consisting in placing at a given point on the toroidal and not vulcanized harvesting reinforcement frame (1) layer of the ridge (31, 32)formed of reinforcing elements parallel to each other in a single layer and forming with the circumferential direction of this pneumatic tyres some acute angle, wherein when the Assembly layer of the ridge (31, 32) after laying on the toroidal blank frame different layers (8) rubber mixtures, separating in the radial direction of the valve frame (1) from valve crest (3), carry styling intermediate the so-called “coated on one side of the layer, not vulcanized and formed reinforcing elements having individual coverage of the so-called rubber compound coating B1, having a given composition and specified physical properties, and reinforcing elements, loc is gaudiest parallel to each other, cover one side of the first rubber layer or reference layer A1 having a constant composition and properties, and is faced on one side of the layer is introduced into contact with the second cladding layer D having the composition and properties varying as a function of the axial width of the layer of the ridge (31, 32) in this pneumatic tire.

28. The method according to item 27, wherein the pneumatic tire has a valve crest (3), formed by two layers (31, 32), in paragraph 8, and in which the stack

a) on the toroidal and not vulkanisierung billet valve frame (1) “coated on one side of the layer and support layer A1 mentioned layer is located inside in the radial direction,

b) then, on visible reinforcing elements of this “coated on one side of the layer, the second cladding rubber layer D inner in the radial direction of the layer of the ridge (31), the composition and properties of which vary in function of the axial width of the layer of the ridge in this pneumatic tire, and the layers A1 and D form, together with having a floor supporting elements, a layer of the ridge (31)closest to the valve frame (1),

C) then the second cladding rubber layer (D) a layer of a ridge (32)adjacent in the radial direction to the inner layer (31), and the second cladding layer has a composition and properties, Esmeraldas is in function of the axial width of the layer of the ridge (32) in this pneumatic tire,

d) and then, from the outside in the radial direction, is faced on one side of the layer that is positioned so that its visible reinforcing elements are oriented inward in the radial direction.

29. Method of manufacturing vulcanized “coated on one side of the layer formed of reinforcing elements having individual coverage of pre-vulcanized rubber mixture (b, B1), characterized in that the reinforcing elements coming from the supply coil (100), is sent to the extruder (200), the head of which contains a number of nozzles adapted for the formation of the coating elements rubber mixture coating (b, B1) of a given thickness, then these elements are sent to the means (210)to separate each cord thread from neighboring in the axial direction of the cord thread to the desired length, then these cord thread arrives at the calender (300) with two rollers (310) and (320), providing the possibility of obtaining a flat strip facing the reference mixture (a, A1), into contact with which has a floor elements will be introduced at the top in the radial direction of the upper roller (310), and using the so-called auxiliary clamping device (330) applied to the coated elements pressure, which regulate function and the required depth of immersion of these elements in the base layer (A, A1), and roll (340) causes the intermediate plug strip that prevent bonding, to one side of the layer coming from the calender (300), thus, to be able to wind the said layer at the receiving drum (350), after which this layer perform incisions under the required angle for forming suitable for joining of panels and get “coated on one side of the layer.



 

Same patents:

FIELD: automotive industry.

SUBSTANCE: proposed elastic tire carrying load without internal air pressure includes tread in contact with ground and areas of side strips passing in radial direction inwards from tread area and secured in tire bead areas adapted for remaining connected with wheel when tire rolls. Reinforced ring strip is arranged inside tread in radial direction. Said contains elastomer layer working in shifting, at least first diaphragm connected with inner surface of elastomer layer working in shifting is radial direction, and at least second diaphragm connected with external surface of elastomer layer working in shafting in radial direction.

EFFECT: improved reliability of tire owing to possibility of its operation in deflated state.

27 cl, 1 tbl, 13 dwg

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EFFECT: improved performance characteristics of tires.

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FIELD: automotive industry; tyre industry.

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EFFECT: reduced materials usage, labour input and power consumption at production of tyre.

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