KR20230007740A - Tires that prevent separation between belts - Google Patents

Abstract

Disclosed is a tire for preventing separation between belts. According to the present invention, the tire for preventing separation between belts includes: a crown which is formed by stacking an inner liner, a carcass, a plurality of belts, and a tread in order from an inner rim thereof; a side wall which supports both side surfaces of the crown; and a bead which is coupled to a wheel. The tire for preventing separation between belts includes a separation prevention member configured to be interposed between adjacent belts along both side edges in a widthwise direction of the belts, respectively, to seal a gap between the belts to prevent the belts from being separated from each other and include a thermally conductive material. According to the present invention, the tire for preventing separation between belts can block moisture or inflow of air between the belts as the separation prevention member, made of the thermally conductive material and interposed between adjacent belts along both side edges in the widthwise direction of the belt, respectively, performs strong adhesion and sealing between the belts and can reduce heating at a belt surrounding portion generated during driving of the tire, thereby effectively preventing separation between the belts or relative flow between the belts and, furthermore, promoting improvement of durability of the tire.

Description

Belt separation prevention type tires {TIRES THAT PREVENT SEPARATION BETWEEN BELTS}

The present invention relates to a separation prevention type tire between belts, and more particularly, to prevent separation between a plurality of belts provided to support the inside of a tread through which a road surface impact is transmitted, while preventing separation between belts that occur during tire driving. It relates to a tire capable of reducing heat generation.

As shown in FIG. 4, a general pneumatic tire includes an inner liner forming an airtight space around the inner circumference of the tire, a carcass 1 stacked on the outer circumference, and at least one belt 3 stacked on the outer circumference. ), a tread 4 laminated on the outer circumference and substantially in contact with the ground, and an edge cap ply 11 reinforcing both edges of the belt 3 in the width direction between the belt 3 and the tread 4 , Sidewall 2 constituting both sides of the tire, and a bead 7 coupled to the wheel to seal the inside of the tire.

The above technology for general tires is disclosed in detail in Korean Patent Registration No. 10-0291495 (published on March 13, 2001).

At this time, the edge edge cap ply 11 is molded into a thin strip-shaped rubber composition having a certain width in a rolling mill or extruder, continuously wound around a winding roll and stored, then taken out from the winding roll in the molding process and placed on a drum belt ( It is fixed in the form of being wound several times to cover both ends of 3) to support the belt (3).

However, the conventional edge cap ply 11 as described above has a low thermal conductivity or heat dissipation capacity due to the nature of the composition constituting it, and is vulnerable to tire heat generated due to high-speed driving of a high-performance vehicle, insufficient tire pressure, or overloading of a vehicle. .

In addition, it is not disposed between a plurality of belts 3, but is installed in a form that simply wraps the outer surface of the stacked belts 3, so that separation between the plurality of belts 3 or belts 3 There is a problem of not firmly holding the relative flow between the liver.

In order to solve the problem of excessive heat generation or separation of the tire, various researches and developments have been conducted on the addition of fiber cords to the edge cap ply 11 or the content of raw rubber or carbon black as a reinforcing material, but the flow between the belts 3 Alternatively, there is still a lack of specific research on a technical method for effectively suppressing the separation phenomenon and at the same time significantly improving the heat dissipation or heat shielding ability around the belt 3.

Korean Registered Patent No. 10-0291495 (published on March 13, 2001)

An object of the present invention is to separate belts or relative flow between belts caused by moisture or air flowing in between a plurality of belts to support the inside of a tread through which road impact is transmitted, or heat generated in the periphery of the belt generated during tire driving. It is to provide a belt-to-belt separation prevention type tire capable of preventing or reducing the

The above object is a tire including a crown stacked in the order of an inner liner, a carcass, a plurality of belts, and a tread from the lumen, a sidewall supporting both sides of the crown, and a bead coupled to a wheel, and separation between the belts Between the belts, characterized in that, in order to prevent the belts, a separation preventing member is interposed between the belts adjacent to each other along both edges in the width direction of the belts to seal the belts and to include a thermally conductive material. This is achieved by anti-separation tires.

The separation preventing member,

It can be made by processing a composite material containing a thermally conductive filler forming a heat transfer path in a polyurethane resin into a strip shape.

The separation preventing member,

It can be made by topping the composite material on a thermally conductive wire cord.

On the upper and lower surfaces of the separation preventing member,

In order to increase the contact area with the belt interposed therebetween, hemispherical or triangular pyramidal concavo-convex portions may be provided.

In the belts adjacent to each other in which the separation prevention part is interposed,

A groove formed by compression in a shape corresponding to the protrusion may be provided.

According to the present invention, the inflow of moisture or air between the belts is achieved as the belts are firmly bonded and sealed due to separation preventing members made of thermally conductive material and interposed between belts adjacent to each other along both edges in the width direction of the belts. This can be blocked, and heat generated around the belt during tire driving can be reduced, so separation between belts or relative flow between belts can be effectively prevented, and furthermore, the durability of the tire can be improved.

1 is a partially cut-away perspective view of a belt-to-belt separation prevention tire according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view illustrating a stacked arrangement and structure of the tire shown in FIG. 1 .
3 is a view schematically illustrating a process of manufacturing a separation preventing member according to an embodiment of the present invention of FIG. 1 .
4 is a cross-sectional view showing an edge cap ply installed to supplement a belt structure of a conventional tire.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, in describing the present invention, descriptions of already known functions or configurations will be omitted to clarify the gist of the present invention.

1 is a partially cut-away perspective view of a belt-to-belt separation prevention tire according to an embodiment of the present invention, FIG. 2 is a cross-sectional view showing the stacked arrangement and structure of the tire shown in FIG. 1, and FIG. It is a diagram briefly showing a process of manufacturing a separation preventing member according to an embodiment of the present invention, and FIG. 4 is a cross-sectional view showing an edge cap ply installed to supplement a belt structure of a conventional tire.

Top (top), bottom (bottom), left and right (side or side), front (front, front), back (back, back), etc., which refer to directions in the description and claims of the invention, etc., are not intended to limit the use of rights. For convenience of description, the relative position between the drawings and configurations is determined as a standard, and the three axes may be rotated and changed to correspond to each other, and this is followed unless otherwise specifically defined.

The inter-belt separation prevention tire 100 according to the present invention is an invention devised to improve tire durability by preventing separation between the belts 30a and 30b or relative flow between the belts 30a and 30b. to be.

As will be described later, the function or operation of the present invention described above is to firmly bond and seal between the plurality of belts 30a and 30b stacked under the tread 40 through the separation preventing member 120, and during tire driving. This can be achieved by reducing the heat generated around the belts 30a and 30b.

In order to implement the above functions or actions, the tire 100 according to the embodiment of the present invention, as specifically shown in FIGS. 1 to 3, the inner liner 10, the carcass 20, It may include a plurality of belts 30a and 30b, a crown 110 stacked in the order of the tread 40, a sidewall 130, a bead 140, and a separation preventing member 120.

Here, the inner liner 10, the carcass 20, the plurality of belts 30a and 30b, the tread 40, the sidewall 130, and the bead 140 are sequentially laminated and molded in the tire molding process, and conventionally As a general component constituting a tire, since each shape or material is not particularly limited in relation to the separation preventing member 120, which is a technical feature of the present invention, it will be briefly mentioned below.

First, the inner liner 10 is a component made of rubber material that forms an airtight space filled with air injected from the outside, and the carcass 20 supports the strong air pressure in the lumen and forms the skeleton of the tire. It is a component made of topped cord fiber or cord steel and laminated on the outside of the inner liner 10.

In addition, the plurality of belts 30a and 30b are stacked on the outside of the carcass 20 in the required number according to the purpose or use of the tire as a component made of cord steel topped with a rubber material for driving stability. It serves to keep (40) flat.

At this time, the plurality of belts 30a and 30b stacked may be manufactured in a form in which the length in the width direction of the tire decreases as it approaches the tread 40, as shown in FIGS. 1 and 2, and unlike the shown It can be manufactured with the same length in the width direction.

In addition, the tread 40 is a component that is laminated on the outside of the belts 30a and 30b to contact the ground and form frictional force, and the sidewall 130 supports both sides of the crown 110 and protects against road impact during driving. It is a component that generates heat according to the stretching movement, and the bead 140 is located at one end of the sidewall 130 to seal the lumen and is a component coupled to the wheel.

In addition, the cap ply 35 is an auxiliary component provided to prevent separation of the plurality of belts 30a and 30b, and is provided between the belts 30a and 30b and the tread 40, and the belts 30a and 30b ) may be wound and laminated to cover the entirety or both edges in the width direction.

The separation preventing member 120 according to the present invention is made of a thermally conductive material and reduces heat generated around the belts 30a and 30b generated during tire driving, and seals between the plurality of belts 30a and 30b stacked to form a belt. As a component specially designed in the present invention to block the inflow of moisture or air between (30a, 30b), this prevents separation between the belts (30a, 30b), ultimately improving tire durability. .

As shown in FIGS. 1 to 3, the separation preventing member 120 according to an embodiment of the present invention is between the belts 30a and 30b adjacent to each other along both edges in the width direction of the belts 30a and 30b. It may be made of a thin strip shape interposed therebetween, and may be made of a structure including, specifically, a thermally conductive wire cord 122, a composite material 124, a protrusion 126 and a groove 128.

Here, the thermally conductive wire cord 122 is a component provided to further improve the heat dissipation performance of the separation preventing member 120 itself while enhancing the rigidity of the separation preventing member 120, and as shown in FIG. 3, a thin wire The core material of the separation preventing member 120 is formed in the form of a single cord in which thermally conductive metal materials drawn into a shape are arranged in parallel.

At this time, the thermal conductive wire cord 122 is copper (specific weight (kg / m 3): 8300, thermal conductivity (k / ° C): 320) or aluminum (specific weight (kg / m 3): 2710, thermal conductivity (k / ° C) ): 196), etc., it may be desirable to fabricate a metal having excellent workability, relatively light weight and excellent thermal conductivity.

Of course, the thermally conductive wire cord 122 may be formed in the form of a woven or braided fiber cord, unlike the single cord shown in FIGS. 2 and 3 .

The composite material 124 is firmly cross-linked with the belts 30a and 30b stacked up and down through the vulcanization process during the tire manufacturing process, and forms a sealing force between the belts 30a and 30b, while the belt 30a generated while driving the tire , 30b) As a component for reducing heat generation in the peripheral area, it can be made by processing a thermally conductive material into a band shape.

At this time, in the curing process, after inserting the green tire, which has been temporarily molded into a tire shape through the tire molding process, into the tread 40 mold, heat and pressure are applied to form a chemical bond between the laminated crown 110 and the sidewall 130 material. It refers to the process of giving a unique tread pattern and elasticity by inducing it.

As described above, the composite material 124 made of a thermally conductive material is configured to include a thermally conductive filler forming a heat transfer path in the polyurethane resin.

Specifically, the polyurethane resin used in the embodiments of the present invention is a soft polyurethane resin containing isocyanate and polyol, and may be a resin made of a water-initiating urethane monomer that generates gas such as carbon dioxide during polymerization.

In addition, the thermally conductive filler may be formed by mixing an additive including any one of metal, ceramic, and carbon.

At this time, the metal may be composed of at least one of gold (Au), aluminum (Al), copper (Cu), or silver (Ag) in the form of a fine powder.

Ceramics are made of boron nitride, aluminum nitride, lumina, silicon carbide, aluminum oxide, magnesium oxide, and oxide, which have excellent insulation and thermal conductivity. It may be zinc oxide or the like.

Carbon may be graphite, graphene, grapheme oxide, single and multi-walled carbon nanotubes (CNTs), carbon fibers, etc. having excellent thermal conductivity.

The thermally conductive filler as described above is composed of particles of 1 μm to several tens of μm for excellent thermal conductivity, and is surface-modified to improve dispersion properties during the manufacture of the composite material 124. Reaction with isocyanate of polyurethane resin This forms a covalent bond that produces a carbamate ester.

The composite material 124 may contain about 1% to 80% by weight of a thermally conductive filler based on the weight of the polyurethane resin, and the content of the thermally conductive filler is about the degree of heat dissipation characteristics of the composite material 124 to be implemented. It can be easily changed within the corresponding range according to.

The thermally conductive filler dispersed in water (50% to 100% by weight relative to the weight of the polyurethane resin) in the above content and the urethane monomer or polyurethane resin are mixed and polymerized to form a covalent bond through air layers or pores. By forming a heat transfer path of, a porous composite material 124 having a three-dimensional network structure is formed.

The porous composite material 124 formed in this way has the required high stiffness and air voids by appropriately removing the internal air layer or pores through the control of the drying process at a temperature of about 150 ° C and the thermocompression bonding process at a temperature of about 200 ° C. It is possible to maintain high flexibility and secure excellent thermal conductivity.

As an example, water and boron nitride (8μm, 30% by weight) 3g put into a beaker are dispersed using an ultrasonic disperser for 30 minutes, and a seal-type urethane single monomer (HYPOL series) that forms a three-dimensional pore structure by polymerization with water ) After putting 10 g in a beaker, it is stirred at room temperature for several minutes to prepare a porous mixture.

And when the mixture is dried in a vacuum oven at the above-described temperature for several hours and thermally compressed using a 150 ° C. thermocompressor, a thermal diffusivity of 1.45 X 10 ^-3 (m ² /s) and a thermal diffusivity of 15.8 (W / mK) It is possible to obtain a polyurethane-boron nitride composite material 124 having a compressed structure having planar thermal conductivity.

The composite material 124 manufactured as described above is dried in a strip shape (only the drying process is performed) or thermally compressed (up to the thermal compression bonding process), and then the forming roller of the rolling process as shown in FIG. 3 ( 1) is thermally pressed and topped on the above-described thermally conductive wire cord 122 to form the separation preventing member 120 according to an embodiment of the present invention.

Specific specifications of the separation preventing member 120 according to an embodiment of the present invention are not particularly limited, but may be manufactured to have a width of about 3 mm and a thickness of 1 mm for easy bonding with intervening belts 30a and 30b.

The protrusion 126 is a component provided to increase the sealing force and coupling force between the separation preventing member 120 and the belts 30a and 30b, and as shown in FIGS. 1 and 2, the upper surface of the separation preventing member 120. It may be formed by repeatedly forming hemispherical or triangular pyramidal irregularities on the lower surface and the lower surface, respectively.

As shown in FIG. 3, these protrusions 126 may be formed on both sides of the composite material 124 by being rolled by molding protrusions provided on a pair of forming rollers 1 arranged to face each other. .

The groove 128 is a component provided for smoother adhesion between the belts 30a and 30b and the separation preventing member 120 and for guiding the accurate coupling position between the above-described protrusions 126 and the belts 30a and 30b, The separation preventing member 120 may be formed by compression-molding, respectively, on adjacent belts 30a and 30b interposed therebetween.

The groove 128 is formed on a pair of compression rollers (not shown) having a predetermined projection on one side to form a shape corresponding to the projection 126 (interlocking structure), and the belts 30a and 30b. It can be formed by introducing

Due to these protrusions 126 and grooves 128, the separation preventing member 120 is interposed between the belts 30a and 30b and the separation preventing member 120, and the separation preventing member 120 having the same width and a flat shape. In comparison, as the contact area is greatly increased, both sides can form a sealing force by stronger crosslinking and chemical bonding through the vulcanization process.

As described above, according to the tire 100 according to the embodiment of the present invention, the inflow of moisture or air between the plurality of stacked belts 30a and 30b can be fundamentally blocked through the separation preventing member 120, , The heat generated in the periphery of the belts 30a and 30b generated during tire driving can be overlapped and reduced by the thermal conductive wire cord 122 and the composite material 124, resulting in separation between the belts 30a and 30b or Relative flow between the belts 30a and 30b can be effectively prevented, and furthermore, the durability of the tire can be improved.

In the foregoing, although specific embodiments of the present invention have been described and shown, the present invention is not limited to the described embodiments, and it is common knowledge in the art that various modifications and variations can be made without departing from the spirit and scope of the present invention. It is self-evident to those who have Therefore, such modifications or variations should not be individually understood from the technical spirit or viewpoint of the present invention, and modified embodiments should fall within the scope of the claims of the present invention.

1: forming roller 10: inner liner
20: carcass 30a, 30b: belt
35: cap ply 40: tread
100: Inter-belt separation prevention tire
110: crown 120: separation prevention member
122: thermal conductive wire cord 124: composite material
126: protrusion 128: groove
130: sidewall 140: bead

Claims (5)

A tire including a crown stacked in the order of an inner liner, a carcass, a plurality of belts, and a tread from the lumen, a sidewall supporting both sides of the crown, and a bead coupled to a wheel,
In order to prevent separation between the belts, it is interposed between the belts adjacent to each other along both edges of the belts in the width direction to seal the belts and to include a separation prevention member made of a thermal conductive material. A tire that prevents separation between belts. According to claim 1,
The separation preventing member,
An anti-separation tire between belts, characterized in that it is formed by processing a composite material containing a thermally conductive filler that forms a heat transfer path in a polyurethane resin into a belt shape. According to claim 2,
The separation preventing member,
An anti-separation tire between belts, characterized in that formed by topping the composite material on a thermally conductive wire cord. According to claim 2,
On the upper and lower surfaces of the separation preventing member,
An anti-separation tire between belts, characterized in that a protrusion in which hemispherical or triangular pyramidal irregularities are repeatedly formed is provided in order to increase a contact area with the belt interposed therebetween. According to claim 4,
In the belts adjacent to each other in which the separation prevention part is interposed,
An anti-separation tire between belts, characterized in that a groove formed by compression in a shape corresponding to the protrusion is provided.

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