KR102241023B1 - Multi-layered composite rubber hose comprising beaded band and manufacturing method thereof - Google Patents

Abstract

Provided is a multi-layer composite rubber hose comprising a bead band. In one embodiment of the multi-layer composite rubber hose, the multi-layer composite rubber hose comprises: a cylindrical inner rubber layer; a bead band layer formed on the inner rubber layer and having a bead band disposed therein; a reinforcing fabric layer formed on the bead band layer; and an outer surface rubber layer formed on the reinforcing fabric layer, wherein the bead band may comprise a band threaded through the through-hole so that the beads and a plurality of beads having the through-hole formed therein are sequentially disposed. Therefore, the present invention is capable of improving an abrasion resistance, a heat resistance, a chemical resistance, and an electrical insulation of the rubber hose.

Description

A multi-layered composite rubber hose including a bead band, and a manufacturing method thereof TECHNICAL FIELD [MULTI-LAYERED COMPOSITE RUBBER HOSE COMPRISING BEADED BAND AND MANUFACTURING METHOD THEREOF}

The present invention relates to a multilayer composite rubber hose and a manufacturing method thereof, and specifically, a multilayer composite rubber hose with improved abrasion resistance, heat resistance, chemical resistance, and electrical insulation, including a bead band, for example, a ceramic ball elastic band, and a manufacturing method thereof It's about the method.

Rubber hoses are mainly used as a passage for fluid in engines, pneumatic facilities, hydraulic facilities, etc. used in automobiles, ships, or industrial facilities. The rubber hose may be manufactured by forming a rubber layer on the outer and/or inner surface of a reinforcing layer made of high-tensile fibers or the like, and extruded in an extruder or spirally molded.

Meanwhile, there have been attempts to insert a reinforcing material into the rubber hose to improve abrasion resistance, heat resistance, chemical resistance, and electrical insulation so that the rubber hose can be applied in steel mills, cement factories, and coal-fired power plants.

However, when a conventional rubber hose includes a material for improving abrasion resistance, the flexibility of the rubber hose is significantly lowered, or when a material for not affecting the bendability is included, abrasion resistance, heat resistance, chemical resistance, etc. are remarkable. There was a problem that was degraded.

Accordingly, there is a need to develop a multilayer composite rubber hose including a reinforcing material capable of improving abrasion resistance, heat resistance, chemical resistance, and electrical insulation while maintaining the flexibility of the rubber hose.

Republic of Korea Patent Publication No. 10-2015-0020572 (published on February 26, 2015)

The present invention is to solve the above problems, to provide a multi-layered composite rubber hose capable of improving abrasion resistance, heat resistance, chemical resistance, and electrical insulation while maintaining the flexibility of the rubber hose and a method of manufacturing the same.

The present invention, in order to solve the above problems, in a multi-layered composite rubber hose, the cylindrical inner rubber layer; A bead band layer formed on the inner rubber layer and having a bead band disposed therein; A reinforcing fabric layer formed on the bead band layer; And an outer rubber layer formed on the reinforcing fabric layer, wherein the bead band includes a bead having a through hole therein and a band pierced through the through hole so that a plurality of the beads are continuously disposed. To provide a multi-layer composite rubber hose.

For example, the reinforcement fabric layer includes a lower reinforcement fabric layer formed on the bead band layer and a complementary reinforcement fabric layer formed on the lower reinforcement fabric layer, wherein a hard steel wire is formed between the lower reinforcement fabric layer and the complementary reinforcement fabric layer. It may further include a hard steel wire layer disposed therein.

For example, a life check member may be disposed on the bead band layer.

At this time, the life check member may include an optical cable.

In addition, the bead may include a straight portion and a pair of arc portions extending from the straight portion and formed so as to correspond between the straight portion, and the through hole may be formed to penetrate the pair of arc portions.

The present invention also provides a method for manufacturing a multilayer composite rubber hose, comprising: manufacturing a bead band; Inserting the bead band on a mandrel in which the inner rubber is disposed on the outer circumferential surface; Forming a rubber hose by winding a reinforcing cloth and an outer rubber on the bead band; Curing the molded rubber hose; And extracting the mandrel; Including, manufacturing the bead band, comprising a through hole formed inside the bead through a band so that a plurality of the beads are arranged in succession, including a bead band It provides a method of manufacturing a multilayer composite rubber hose.

At this time, forming a hose by winding the reinforcing fabric and the outer rubber may include winding the lower reinforcing fabric on the bead band; Winding a hard steel wire on the lower reinforcement fabric; And winding a complementary steel cloth on the hard steel wire.

In addition, the bead may include a straight portion and a pair of arc portions extending from the straight portion and formed so as to correspond between the straight portion, and the through hole may be formed to penetrate the pair of arc portions.

On the other hand, manufacturing the bead band may include attaching a plurality of beads into a band through a hole formed inside the bead, and then bonding both ends of the band to each other to form a circular shape.

At this time, the band includes an elastic material, and fitting the bead band to the mandrel in which the inner rubber is disposed on the outer circumferential surface includes expanding the bead band and inserting the bead band into a hollow forming pipe; Inserting the mandrel into the forming pipe; And moving the bead band to the mandrill so that the bead band is disposed on the inner rubber.

According to an embodiment of the present invention, by applying the bead band according to an embodiment of the present invention to a rubber hose, while preventing deterioration in flexural properties compared to a rubber hose to which the bead band is not applied, the abrasion resistance, heat resistance, and resistance of the rubber hose Chemical and electrical insulation properties can be improved.

1 shows a multi-layered composite rubber hose including a bead band according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along AA of FIG. 1.
3 shows a bead according to an embodiment of the present invention, and FIG. 4 shows a form in which a band according to an embodiment of the present invention is attached to a bead.
5 to 8 show a method of manufacturing a multi-layered composite rubber hose including a bead band according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in a variety of different forms. However, this embodiment makes the disclosure of the present invention complete, and the contents of the present invention are disclosed to those of ordinary skill in the art. It is provided to inform you more completely.

In this specification, when an element is referred to as being positioned'above' or'below' another element, it means that the element is positioned directly above or'below' another element, or an additional element is placed between those elements. It includes all meanings that can be intervened. In this specification, the term'upper' or'lower' is a relative concept set at the observer's point of view, and when the observer's point of view is different,'upper' may mean'lower', and'lower' refers to'upper'. It could mean.

The same reference numerals in the plurality of drawings refer to elements that are substantially the same as each other. In addition, terms such as'include' or'have' are intended to designate the existence of a feature, number, step, action, component, part, or a combination of the described features, and one or more other features, numbers, or steps. It is to be understood that it does not preclude the possibility of addition or presence of, operations, components, parts, or combinations thereof.

1 shows a multi-layered composite rubber hose including a bead band according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along AA of FIG. 1.

1 and 2, a multi-layered composite rubber hose (hereinafter referred to as'rubber hose') 1 including a bead band 300, an inner rubber layer 10, a bead band layer 20, a reinforcing fabric layer ( 80), a hard steel wire layer 40, and an outer rubber layer 60.

The rubber hose 1 is for transporting metal castings, steel, stone, concrete, and the like, and the type of the object to be transported is not limited thereto, and may be formed in an approximately cylindrical shape.

At least one end of the rubber hose 1, a flange, for example, a flange made of STS 304 may be firmly bonded to the rubber hose 1.

The inner rubber layer 10 is a layer that is bonded to the object to be transported, and serves as an artery to prevent leakage of fluid by maintaining the airtightness of the rubber hose 1. For example, the inner rubber layer 10 may include 55 to 65 parts by weight of a polymer per 100 parts by weight of the rubber composition of the inner rubber layer.

The polymer may include 25 parts by weight to 30 parts by weight of natural rubber (NR) and 30 to 35 parts by weight of BR (Butadiene Rubber) per 100 parts by weight of the rubber composition of the inner rubber layer. Within the above composition range, even when the bead band layer 20 is included, high mechanical properties and abrasion resistance can be maintained.

The reinforcing material may include 30 parts by weight to 35 parts by weight per 100 parts by weight of the rubber composition of the inner rubber layer. For example, the reinforcing material may include carbon black, for example, ISAF (Intermediate super abrasion furnance) grade N220 may be included. Even when the bead band layer 20 is included within the composition range, high wear resistance can be maintained.

As a process oil, the softener may be included in an amount of 1 to 5 parts by weight per 100 parts by weight of the rubber composition of the inner rubber layer. For example, the emollient may include Aromatic Oil.

As other processing aids, organic/inorganic materials may be included in an amount of 5 to 10 parts by weight per 100 parts by weight of the rubber composition for the inner rubber layer.

The bead band layer 20 may be formed on the inner rubber layer 10.

For example, the bead band layer 20 may refer to a layer formed as a separate layer on the inner rubber layer 10, or refers to a region in which the bead band 300 is formed on the inner rubber layer 10 can do.

Conventionally, a ceramic ball sheet was manufactured by bonding a ceramic ball on a rubber sheet and then molding it. However, in the case of such a method, the manufacturing process is complicated and it takes a long time to manufacture, and there is a problem that the flexibility between the ceramic balls is not exhibited, and thus the flexibility of the rubber hose is lowered.

Accordingly, the inventors of the present invention have attempted to improve the abrasion resistance of the rubber hose 1 by applying the bead band 300, that is, the ceramic ball elastic band, while greatly improving the bendability, and propose a new manufacturing method for manufacturing the same. Came to develop. This will be described below.

3 shows a bead according to an embodiment of the present invention, and FIG. 4 shows a form in which a band according to an embodiment of the present invention has a bead.

3 and 4, the bead band 300 may include a bead 100 and a band 200.

The bead 100 has a through hole 130 formed therein, and may be made of a material such as metal, polymer, or ceramic, and may be made of, for example, a ceramic material. For example, a ceramic material may be pressed to be manufactured, thereby improving abrasion resistance compared to an assembled form.

For example, as the bead 100 is applied with an alumina content of 95% or more, the wear resistance of the rubber hose 1 is improved, so that even when the rubber hose 1 is used in a harsh friction environment, the service life will be improved. I can.

The bead 100 may have a spherical shape or a rugby ball shape, and as an example, a rugby ball shape may be applied.

For example, the bead 100 is extended from the straight portion 110 and the straight portion 110, and includes a pair of arc portions 120 formed to correspond to the straight portion 110 between, and the through hole 130 ) May be formed to penetrate the pair of arc portions 120, for example, the through hole 130 may pass through the pair of arc portions 120 in a straight line. In this case, the straight portion 110 may refer to a cylindrical cross-section, and the arc portion 120 may refer to a spherical cross-section.

Accordingly, abrasion resistance and bendability may be improved compared to a case in which a conventional simple spherical ceramic ball is attached to a sheet to be molded.

The band 200 is pierced through the through hole 130 so that the plurality of beads 100 are continuously arranged, and may include an elastic material. For example, by including a material such as urethane, the stretching, stretching, and elastic properties of the band 200 may be improved.

The bead band 300 may be formed by attaching the band 200 through the through hole 130 so that the plurality of beads 100 are arranged in a row, and then both ends of the band 200 are heat-sealed.

For example, one bead band 300 may form one row on the inner rubber layer 10, and the bead band layer 20 may be formed so that the plurality of bead bands 300 form a plurality of rows.

For example, the bead band layer 20 may be formed so that one bead band 300 surrounds the inner rubber layer 10 in a spiral shape.

As an example, the bead band layer 20 is formed in a form in which the bead band 300 is disposed on the inner rubber layer 10, and then the bead band 300 is wrapped with 1 ply of inner rubber made of the above-described inner rubber layer composition. Can be.

That is, the present invention includes a separate bead band layer 20 formed on the inner rubber layer 10 or a bead band layer 20 constituting the upper portion of the inner rubber layer 10, thereby passing through the inside of the rubber hose 1 Resistance to fluid can be greatly improved. In addition, in the present invention, the bead 100 is manufactured in a form in which the bead 100 is threaded by the elastic band 200, that is, a bead-like shape, so that the ceramic plate or the bead 100 is simply inserted into the inner rubber layer 10. Compared to the case, a uniform spacing is provided between the beads 100 and the beads 100, and the beads 100 can be moved up and down by the elastic band 200, so that the flexibility of the rubber hose 1 is increased. It can be improved, and accordingly, the structure of the rubber hose 1 can be prevented from being deformed or damaged.

Referring back to FIGS. 1 and 2, the reinforcing fabric layer 80 is formed on the bead band layer 20.

The reinforcing fabric layer 80 can improve resistance to pressure, tensile force, bending, fatigue, etc. due to the fluid passing through the rubber hose 1, and the inner rubber layer 10, the bead band layer 20, and the outer rubber layer It performs the function of imparting a strong bonding force between (60).

For example, the reinforcing fabric layer 80 may include synthetic cords and fabrics.

For example, the reinforcing fabric layer 80 may include a steel-cord. For example, the reinforcing fabric layer 80 may include a plurality of steel-cords.

For example, the reinforcing fabric layer 80 may include reinforcing fibers. For example, the reinforcing fabric layer 80 may include any one or more reinforcing fibers selected from nylon fibers, rayon fibers, polyester fibers, and aramid fibers. As an example, the reinforcing fabric layer 80 may include a plurality of reinforcing fibers, and in one embodiment, 2 to 10 ply of reinforcing fibers are included, and depending on the number of reinforcing fiber ply, the overlapping width and forming angle during molding are determined. By changing, it is possible to improve the pressure resistance and flexibility of the rubber hose 1 including the bead band layer 20.

The reinforcing fabric layer 80 may contain 35 parts by weight to 45 parts by weight of a polymer per 100 parts by weight of the rubber composition for the reinforcing fabric layer, and the steel-cord or reinforcing fibers are extruded together to be formed after the reinforcing fabric layer rubber composition is polymerized. I can.

The polymer may include 25 to 30 parts by weight of NR and 10 to 15 parts by weight of SBR per 100 parts by weight of the rubber composition of the reinforcing fabric layer. Within the above numerical range, even if the bead band layer 20 is included in the rubber hose 1, high mechanical properties can be achieved.

The reinforcing material may include 15 parts by weight to 20 parts by weight per 100 parts by weight of the rubber composition of the inner rubber layer. For example, the reinforcing material may include carbon black, for example, HAF class N330 (High abrasion furnance) and/or FEF class N550 (Fast Extruding Furnace) may be included, and reinforcement and workability may be improved. .

The filler may be included in 25 to 30 parts by weight per 100 parts by weight of the rubber composition of the inner rubber layer. For example, the filler may include light calcium carbonate CaCO3 (Calcium carbonate) to reduce manufacturing cost.

As a process oil, the softener may be included in 5 to 10 parts by weight per 100 parts by weight of the rubber composition of the inner rubber layer. For example, the emollient may include Naphthenic Oil.

As other processing aids, 5 to 10 parts by weight of organic/inorganic materials per 100 parts by weight of the rubber composition for the inner rubber layer may be included to improve adhesion.

The reinforcing fabric layer 80 may include an upper reinforcing fabric layer 50 and a lower reinforcing fabric layer 30.

The lower reinforcement fabric layer 30 may be formed on the bead band layer 20, and a hard steel wire layer 40 may be formed between the lower reinforcement fabric layer 30 and the upper reinforcement fabric layer 50.

The hard steel wire layer 40 may have a span wire disposed therein.

For example, the hard steel wire may be formed in a spiral shape, and as an example, the hard steel wire may be formed once in a spiral shape.

Accordingly, it exhibits resistance to bending and folding due to bending of the rubber hose 1, and by maintaining the circular shape inside the rubber hose 1 under given conditions such as discharge pressure, suction pressure, and external force, it resists the movement of fluid. By not generating the fluid can be efficiently transported.

The hard steel wire layer 40 may include 40 parts by weight to 50 parts by weight of a polymer per 100 parts by weight of the hard steel wire layer rubber composition, and after the hard steel wire layer rubber composition is polymerized, the span wire may be extruded together to be formed.

The polymer may include 15 parts by weight to 20 parts by weight of NR and 25 to 30 parts by weight of SBR per 100 parts by weight of the hard steel wire layer rubber composition. Within the above numerical range, even if the bead band layer 20 is included in the rubber hose 1, high mechanical properties can be achieved.

The reinforcing material may include 25 parts by weight to 30 parts by weight per 100 parts by weight of the hard steel wire layer rubber composition. For example, the reinforcing material may include carbon black, and for example, HAF-class high abrasion furnance (N330) may be included, so that reinforcement and workability may be improved.

As a process oil, the softener may be included in an amount of 10 to 15 parts by weight per 100 parts by weight of the hard steel wire layer rubber composition. For example, the emollient may include Aromatic Oil.

As other processing aids, organic/inorganic materials may be included in an amount of 5 to 10 parts by weight per 100 parts by weight of the hard steel wire layer rubber composition, and for example, ozone-resistant chemicals having resistance to external exposure environments may be added.

The outer rubber layer 60 is formed on the reinforcing reinforcing fabric layer 50 to prevent damage to the rubber hose 1 from ozone, sunlight, friction, abrasion, etc. to protect the internal structure of the rubber hose 1.

For example, the outer rubber layer 60 may include 40 to 50 parts by weight of a polymer per 100 parts by weight of the rubber composition of the outer rubber layer.

The polymer may include 15 to 20 parts by weight of NR and 25 to 30 parts by weight of SBR per 100 parts by weight of the rubber composition of the outer rubber layer. Within the above numerical range, even if the bead band layer 20 is included in the rubber hose 1, high mechanical properties can be achieved.

The reinforcing material may include 25 parts by weight to 30 parts by weight per 100 parts by weight of the rubber composition of the outer rubber layer. For example, the reinforcing material may include carbon black, and for example, HAF-class high abrasion furnance (N330) may be included, so that reinforcement and workability may be improved.

As a process oil, the softener may be included in an amount of 10 to 15 parts by weight per 100 parts by weight of the rubber composition for the outer rubber layer. For example, the emollient may include Aromatic Oil.

As other processing aids, organic/inorganic substances may be included in an amount of 5 to 10 parts by weight per 100 parts by weight of the rubber composition for the outer rubber layer, and for example, ozone-resistant chemicals having resistance to external exposure environments may be added.

For example, the outer rubber layer 60 may contain glass fabric, which is a non-flammable material, to prevent deformation of the rubber hose due to high temperature heat generated in a steel mill, etc., and to protect the outer rubber layer 60.

For example, the glass fiber may be cured after vulcanization on the outer rubber layer 60, and as an example, a K618 series product of Hankook Fiber Co., Ltd. may be applied.

On the other hand, the rubber hose 1 may further include a life check member 70.

For example, the life check member 70 may include an optical cable.

For example, in the optical cable, an optical signal input from one end may be output from the other end, and a device for inputting an optical signal and a device for detecting an output of the optical signal may be provided. Accordingly, when the rubber hose 1 is worn or a specific part is damaged and the optical signal output from the optical cable is not detected, the control unit may generate a warning sound or transmit a notification message to the user.

For example, the life check member 70 includes a conductive member through which electrical signals can be input and output, and an electrical signal output from the conductive member is detected because the rubber hose 1 is worn or a specific part is damaged. If not, the controller may generate a notification such as a warning sound or transmit a notification message to the user.

Accordingly, if tearing occurs in the outer rubber layer 60 and the reinforcing fabric layer 80, or if a certain area is severely abrasion, the user should stop using the rubber hose 1 before it is damaged and the fluid flows out. I can.

For example, an optical cable may be applied as the life check member 70 for safety and simplification of equipment.

5 to 8 show a method of manufacturing a multi-layered composite rubber hose including a bead band according to an embodiment of the present invention, and contents overlapping with those described with reference to FIGS. 1 to 4 will be omitted. On the other hand, the inner rubber, reinforcing fabric, lower reinforcing fabric, upper reinforcing fabric, and outer rubber defined below are manufactured and extruded from the rubber compositions of each of the inner rubber layer, reinforcement fabric layer, lower reinforcement fabric layer, complementary reinforcement fabric layer, and outer rubber layer. , Reinforcement fabric layer, lower reinforcement fabric layer, upper reinforcement fabric layer, and external rubber layer.

5 to 8, a method of manufacturing a multi-layered composite rubber hose including a bead band of the present invention (hereinafter,'manufacturing method of a rubber hose') includes manufacturing a bead band 300; Fit the bead band 300 to the mandrel (3) in which the inner rubber (4) is disposed on the outer circumferential surface; A rubber hose is formed by winding a reinforcing cloth and an outer rubber on the bead band 300; Vulcanizing the molded rubber hose; And extracting the mandrel (3).

At this time, forming the hose by winding the reinforcement fabric and the outer rubber, winding the lower reinforcement fabric on the bead band 300; Winding a hard steel wire on the lower reinforcement fabric; And winding a complementary steel cloth on the hard steel wire.

At this time, before winding the lower reinforcing fabric on the bead band 300, 1 ply of inner rubber is further wound to improve the adhesive strength between the bead band layer 20 and the inner rubber layer 10, and include the bead band layer 20. Accordingly, it is possible to prevent the physical properties of the rubber hose (1) from deteriorating.

At this time, after forming the bead band layer 20 by further winding 1 ply of inner rubber on the bead band 300, the life check member 70 may be further wound before winding the lower reinforcing cloth.

For example, the life check member 70 is a member capable of transmitting an optical signal and may include an optical cable.

For example, the hard steel wire may be formed in a spiral shape. For example, the hard steel wire may be formed once in a spiral shape.

On the other hand, the inner rubber layer, the bead band layer, the reinforcing fabric layer, the hard steel wire layer, and the outer rubber layer may be prepared by vulcanizing rubber prepared and extruded from each rubber composition. In addition, by performing an unwrapping process, air formed between the inner rubber layer, the bead band layer, the reinforcing fabric layer, the hard steel wire layer, and the outer rubber layer may be removed, and the bonding strength may be increased.

For example, referring to Figures 3 to 5, manufacturing the bead band 300, a plurality of beads 100 are continuous by piercing the through hole 130 formed in the bead 100 with the band 200 It may include forming to be disposed. At this time, the band 200 is inserted into the inlet of the through hole 130 of one arc part 120 of the pair of arc parts 120 formed in the bead 100, and the through hole 130 leading to the straight part 110 Along the way, a plurality of beads 100 may be attached in a form that comes out through the outlet of the through hole 130 formed in the other arc part 120.

For example, in manufacturing the bead band 300, a plurality of beads 100 are attached to the band 200 through the through hole 130 formed inside the bead 100, and then both ends of the band are bonded together to form a circle. You can make it form.

In this case, the band 200 may include an elastic material.

For example, inserting the bead band 300 into the mandrel (3) in which the inner rubber (4) is disposed on the outer circumferential surface is to expand the bead band 300 to a hollow forming pipe (2) with a bead band (300). Put on; Inserting the mold (3) into the inside of the forming pipe (2); And moving the bead band 300 to the mandrel (3) so that the bead band 300 is disposed on the inner rubber (4).

Accordingly, the present invention provides a uniform spacing between the beads 100 and the beads 100 compared to the case where the conventional ceramic plate is formed or the beads are simply inserted in the inner rubber layer (reference numeral 10 in FIGS. 1 and 2). And, when the rubber hose (number 1 in FIGS. 1 and 2) is bent, the bead 100 can be moved up and down along the elastic band 200, so that the flexibility of the rubber hose 1 can be greatly improved, and accordingly, The structure of the rubber hose 1 can be prevented from being deformed or damaged.

As described above, a detailed description of the present invention has been made by an embodiment with reference to the accompanying drawings, but the above-described embodiment has been described with reference to a preferred example of the present invention, and the present invention is limited to the above embodiment It should not be understood, and the scope of the present invention should be understood as the following claims and equivalent concepts.

For example, the drawings schematically show each component as a main body to aid understanding, and the thickness, length, number, etc. of each component shown may be different from the actual in the progress of the drawing. In addition, the material, shape, dimensions, etc. of each constituent element shown in the above embodiments are not particularly limited as an example, and various changes may be made within the range substantially not departing from the effects of the present invention.

1: rubber hose
2: forming pipe
3: make
4: inner rubber
10: inner rubber layer
20: bead band layer
30: lower reinforced fabric layer
40: hard steel ship layer
41: Gyeonggang Line
50: complementary reinforced fabric layer
60: outer rubber layer
70: life check member
100: bead
110: straight portion
120: arc part
130: through hole
200: band
300: bead band

Claims (10)

In the multilayer composite rubber hose,
Cylindrical inner rubber layer;
A bead band layer formed on the inner rubber layer and having a bead band disposed therein;
A reinforcing fabric layer formed on the bead band layer; And
An outer rubber layer formed on the reinforcing fabric layer;
Including,
The bead band includes a bead having a through hole formed therein and a band passing through the through hole so that a plurality of the beads are continuously arranged,
Multi-layer composite rubber hose with bead band.
The method according to claim 1,
The reinforcement fabric layer includes a lower reinforcement fabric layer formed on the bead band layer and a complementary reinforcement fabric layer formed on the lower reinforcement fabric layer,
A multilayer composite rubber hose including a bead band, further comprising a hard steel wire layer in which a hard steel wire is disposed therein between the lower reinforcement fabric layer and the upper reinforcement fabric layer.
The method according to claim 1,
A multi-layered composite rubber hose including a bead band, in which a life check member is disposed on the bead band layer.
The method of claim 3,
The life check member includes an optical cable, a multi-layered composite rubber hose comprising a bead band.
The method according to claim 1,
The bead includes a straight portion and a pair of arc portions extending from the straight portion, and formed to correspond to the straight portion therebetween,
The through-hole is formed to pass through the pair of arc portions, a multi-layered composite rubber hose including a bead band.
In the manufacturing method of a multilayer composite rubber hose,
To prepare a bead band;
Inserting the bead band on a mandrel in which the inner rubber is disposed on the outer circumferential surface;
Forming a rubber hose by winding a reinforcing cloth and an outer rubber on the bead band;
Curing the molded rubber hose; And
Extracting the mandril;
Including,
To prepare the bead band,
A method of manufacturing a multi-layered composite rubber hose including a bead band, comprising: piercing the through hole formed inside the bead with a band so that a plurality of the beads are arranged in succession.
The method of claim 6,
Forming a hose by winding the reinforcement cloth and the outer rubber,
Winding a lower reinforced cloth on the bead band;
Winding a hard steel wire on the lower reinforcement fabric; And
Winding a complementary steel cloth on the hard steel wire;
A method of manufacturing a multi-layered composite rubber hose comprising a bead band further comprising a.
The method of claim 6,
The bead extends from the straight portion and the straight portion, and includes a pair of arc portions formed to correspond between the straight portion, and the through hole is formed to pass through the pair of arc portions, a multilayer composite rubber hose including a bead band Manufacturing method.
The method of claim 6,
To prepare the bead band,
A method of manufacturing a multilayer composite rubber hose including a bead band, comprising manufacturing a plurality of beads into a band through a through hole formed in the bead and then bonding both ends of the band to each other to form a circular shape.
The method of claim 9,
The band includes an elastic material,
Inserting the bead band to the mandrel in which the inner rubber is disposed on the outer circumferential surface,
Expanding the bead band and inserting the bead band into a hollow forming pipe;
Inserting the mandrel into the forming pipe; And
Moving the bead band to the mandrill so that the bead band is disposed on the inner rubber;
A method of manufacturing a multi-layered composite rubber hose comprising a bead band further comprising a.

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