KR20180136075A - Apparstus for manufacturing composite hose and composite hose manufactured by the apparatus - Google Patents

Apparstus for manufacturing composite hose and composite hose manufactured by the apparatus Download PDF

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Publication number
KR20180136075A
KR20180136075A KR1020170074593A KR20170074593A KR20180136075A KR 20180136075 A KR20180136075 A KR 20180136075A KR 1020170074593 A KR1020170074593 A KR 1020170074593A KR 20170074593 A KR20170074593 A KR 20170074593A KR 20180136075 A KR20180136075 A KR 20180136075A
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KR
South Korea
Prior art keywords
cover
mandrel
composite hose
roller
circumferential surface
Prior art date
Application number
KR1020170074593A
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Korean (ko)
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KR101978478B1 (en
Inventor
김경일
김희진
황영일
Original Assignee
주식회사 상봉코포레이션
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Priority to KR1020170074593A priority Critical patent/KR101978478B1/en
Priority to PCT/KR2018/006668 priority patent/WO2018230948A1/en
Publication of KR20180136075A publication Critical patent/KR20180136075A/en
Application granted granted Critical
Publication of KR101978478B1 publication Critical patent/KR101978478B1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/80—Component parts, details or accessories; Auxiliary operations
    • B29C53/82—Cores or mandrels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/80—Component parts, details or accessories; Auxiliary operations
    • B29C53/82—Cores or mandrels
    • B29C53/821—Mandrels especially adapted for winding and joining
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
    • B29C63/02—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor using sheet or web-like material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/04—Hoses, i.e. flexible pipes made of rubber or flexible plastics
    • F16L11/08—Hoses, i.e. flexible pipes made of rubber or flexible plastics with reinforcements embedded in the wall

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)

Abstract

Disclosed are an apparatus for manufacturing a composite hose and a composite hose manufactured thereby. The apparatus for manufacturing a composite hose according to the present invention expands a cover by increasing the diameter of the cover and then winds components of the composite hose around an outer circumferential surface of the cover to manufacture a composite hose. After the composite hose is manufactured, the cover is contracted by reducing the diameter of the cover around which the composite hose is wound. Then, since a gap is formed between the outer circumferential surface of the cover and an inner circumferential surface of the composite hose, the complex hose can be easily separated from the cover. Therefore, the composite hose can be conveniently manufactured. Further, the composite hose manufactured by the apparatus for manufacturing a composite hose according to the present invention is separated from the cover without friction. Accordingly, the pitch of an inner wire forming an inner circumferential surface side of the composite hose is uniform, and an inner circumferential surface side of a coating layer is not damaged, thereby improving reliability of the composite hose.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a composite hose manufacturing apparatus and a composite hose manufactured by the same,

The present invention relates to a composite hose manufacturing apparatus and a composite hose manufactured thereby.

When unloading liquid cargoes including petrochemicals from vessels, use hose products that are convenient to use. In particular, natural gas and petroleum gases are in a gaseous state at all times, and thus are bulky. Accordingly, natural gas and petroleum gas are liquefied into liquefied natural gas (Liquefied Natural Gas) and liquefied petroleum gas (Liquefied Petroleum Gas), which are small in volume, and then stored in a storage tank of a ship and transported to a destination, At the destination, liquefied natural gas and liquefied petroleum gas are regasified and used as fuel.

Composite hoses are used when transporting fluids such as liquefied natural gas and liquefied petroleum gas. Since the composite hose is used under high pressure conditions, it must have rigidity and be flexible so that it is bent at a constant angle and repeatedly spread.

A method of manufacturing a composite hose using a conventional composite hose manufacturing apparatus will be described.

A conventional composite hose manufacturing apparatus is composed of a cylindrical mandrel.

Thus, while rotating the mandrel, the inner wire is spirally wound around the outer circumferential surface of the mandrel, and then the outer wire is spirally wound around the outer circumferential surface of the outer layer. At this time, the covering layer may include an endothelial layer, a reinforcing layer including a synthetic resin film film and a fibrous layer, and an outer covering layer.

From the inner wire to the outer wire is a composite hose.

Thereafter, the composite hose is pulled in the longitudinal direction to separate the composite hose from the mandrel.

The inner hose of the mandrel and the outer circumferential surface of the mandrel are formed between the outer circumferential surface of the mandrel and the inner circumferential surface of the coating layer by the tension acting on the inner wire, the load acting upon forming the covering layer, A large frictional force acts.

Due to this frictional force, it is very difficult to separate the composite hose from the mandrel in the conventional composite hose manufacturing apparatus, and the manufacturing process is complicated and the productivity is low.

Further, when the composite hose is separated from the mandrel, a friction force between the outer circumferential surface of the mandrel and the inner wire and a friction force between the outer circumferential surface of the mandrel and the inner circumferential surface of the covering layer, Are different from one site to another, and there is a possibility that the coating layer is damaged, so that the reliability of the composite hose is deteriorated.

Particularly, when the pitches of the internal wires are different from each other and the pitch of any one portion is wide, the coating layer may be recessed into the composite hose. As the pitch of the inner wire is widened at a specific portion, the tension of the outer wire and the weight of the covering layer can not be supported, so that the composite hose is depressed. In addition, in a working environment for moving natural gas (natural gas), the composite hose is repeatedly bend and spread by the operator frequently. When the pitch of the inner wire is not constant, the pitch of the inner wire So that the composite hose is collapsed and broken. The breakage of the composite hose causes the flammable fluid flowing out to the outside to be discharged to the outside, causing an explosion and an enormous human casualty in the event of a fire.

Prior art relating to a hose manufacturing apparatus is disclosed in Korean Patent Laid-Open Publication No. 10-2016-0062005 (June 01, 2016).

It is an object of the present invention to provide a composite hose manufacturing apparatus capable of solving all the problems of the conventional art as described above and a composite hose manufactured thereby.

Another object of the present invention is to provide a composite hose manufacturing apparatus capable of conveniently manufacturing a composite hose.

Another object of the present invention is to provide a composite hose that can improve the reliability of a product.

A composite hose manufacturing apparatus according to the present invention comprises: a mandrel of a hollow body; A plurality of rollers rotatably provided on the outer surface side of the mandrel along the circumference of the mandrel; The inner hose is in contact with the outer peripheral surface of the roller, the outer hose of the composite hose is wound on the outer surface of the mandrel, and the mandrel moves along the longitudinal direction to move the roller And a cover which is contracted inside the center of the mandrel or expanded outside the center of the mandrel by changing a portion in contact with the outer circumferential surface of the roller.

In the composite hose manufacturing apparatus according to the present embodiment, the cover is expanded by increasing the diameter of the cover, and then the components of the composite hose are wound on the outer peripheral surface of the cover to manufacture the composite hose. Thereafter, when the manufacture of the composite hose is completed, the diameter of the cover in which the composite hose is wound is reduced to shrink the cover. Then, a clearance is formed between the outer peripheral surface of the cover and the inner peripheral surface of the composite hose, so that the composite hose can be easily separated from the cover. Therefore, there is an effect that the composite hose can be manufactured conveniently.

The composite hose manufactured by the composite hose manufacturing apparatus according to the embodiment of the present invention is separated from the cover without friction. In this case, the pitch of the inner wires constituting the inner circumferential surface side of the composite hose is uniform, and the inner circumferential surface side of the cover layer is not damaged, thereby improving the reliability of the composite hose.

1 is a perspective view showing an expanded state of a composite hose manufacturing apparatus according to an embodiment of the present invention;
BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a composite hose manufacturing apparatus.
3 is a partially exploded perspective view of an apparatus for manufacturing a composite hose according to an embodiment of the present invention.
Figs. 4A and 4B are a sectional view and a plan sectional view taken along the line "AA" in Fig.
Figs. 5A and 5B are a sectional view and a plan sectional view taken along the line BB of Fig. 2; Fig.

It should be noted that, in the specification of the present invention, the same reference numerals as in the drawings denote the same elements, but they are numbered as much as possible even if they are shown in different drawings.

Meanwhile, the meaning of the terms described in the present specification should be understood as follows.

The word " first, "" second," and the like, used to distinguish one element from another, are to be understood to include plural representations unless the context clearly dictates otherwise. The scope of the right should not be limited by these terms.

It should be understood that the terms "comprises" or "having" does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

It should be understood that the term "at least one" includes all possible combinations from one or more related items. For example, the meaning of "at least one of the first item, the second item and the third item" means not only the first item, the second item or the third item, but also the second item and the second item among the first item, Means any combination of items that can be presented from more than one.

It should be understood that the term "and / or" includes all possible combinations from one or more related items. For example, the meaning of "first item, second item and / or third item" may include not only the first item, the second item or the third item but also two of the first item, Means a combination of all items that can be presented from the above.

It is to be understood that when an element is referred to as being "connected or installed" to another element, it may be directly connected or installed with the other element, although other elements may be present in between. On the other hand, when an element is referred to as being "directly connected or installed" to another element, it should be understood that there are no other elements in between. On the other hand, other expressions that describe the relationship between components, such as "between" and "between" or "neighboring to" and "directly adjacent to" should be interpreted as well.

Hereinafter, an apparatus for manufacturing a composite hose according to an embodiment of the present invention and a composite hose manufactured thereby will be described in detail with reference to the accompanying drawings.

2 is a perspective view illustrating a state in which the apparatus for manufacturing a composite hose according to an embodiment of the present invention is contracted, and FIG. 3 is a perspective view of the apparatus for manufacturing a composite hose according to an embodiment of the present invention. Is a partially exploded perspective view of a composite hose manufacturing apparatus according to an embodiment of the present invention.

As shown, the composite hose manufacturing apparatus according to the present embodiment includes a composite hose 50 (see FIGS. 4A and 4B) used for transferring a fluid such as a liquefied natural gas and a liquefied petroleum gas, 5A), and may include a mandrel 110, a support frame 130, a roller 150, and a cover 170. [

The mandrel 110 may be formed in a cylindrical shape having a predetermined length, and may be formed as a hollow body to reduce weight.

The support frame 130 may be formed in a ring shape and installed on the outer circumferential surface of the mandrel 110 along the circumferential direction of the mandrel 110. Two or more support frames 130 may be provided. When only two support frames 130 are provided, it is preferable that the support frames 130 are installed on the longitudinal end side of the mandrel 110, respectively.

The rollers 150 may be rotatably installed on the support frames 130, and a plurality of rollers 150 may be installed on the support frames 130. Since the support frame 130 is formed in a ring shape and is installed along the circumferential direction of the mandrel 110, the rollers 150 provided on the support frames 130 are also provided along the circumferential direction of the mandrel 110.

One side of the roller 150 rotatably installed on the support frame 130 protrudes outside the support frame 130 and the other side is positioned on the inside of the support frame 130 and is not in contact with the outer circumferential surface of the mandrel 110 desirable. The roller 150 may be installed in contact with the outer circumferential surface of the mandrel 110. At this time, instead of the support frame 130, a separate support holder for supporting the roller 150 on the outer circumferential surface of the mandrel 110 Can be installed.

The cover 170 may be formed in a cylindrical shape corresponding to the mandrel 110 so as to surround the mandrel 110 and may be concentric with the mandrel 110. The inner circumferential surface of the cover 170 is in contact with the outer circumferential surface of the roller 150 and the outer circumferential surface of the cover 170 is wound around the composite hose 50 to be formed.

The mandrel 110 can be formed relatively long, but the cover 170 composed of the plurality of cover pieces 171 is hard to form relatively long. Therefore, the cover 170 may be installed in a manner that a plurality of the cover 170 are connected in the longitudinal direction so as to surround the mandrel 110.

The width of the roller 150 is perpendicular to the length of the mandrel 110 such that when the roller 150 rotates, the roller 150 moves from one end of the mandrel 110 to the other end of the mandrel 110, It is possible to move from the other end side in the longitudinal direction of the mandrel 110 to the one end side. That is, since the roller 150 is installed on the mandrel 110 side, when the mandrel 110 is moved, the roller 150 can move together with the mandrel 110. At this time, if the mandrel 110 moves along the longitudinal direction, the roller 150 can rotate and move along with the mandrel 110 in the longitudinal direction of the mandrel 110. That is, since the roller 150 is in contact with the inner circumferential surface of the cover 170, the roller 150 moves along the length direction of the mandrel 110 together with the mandrel 110 while rotating. Therefore, the roller 150 functions to support the mandrel 110 such that the mandrel 110 can be easily moved along its longitudinal direction.

When the mandrel 110 moves along its longitudinal direction to move the roller 150, the inner circumferential surface portion of the cover 170 which contacts the outer circumferential surface of the roller 150 is changed. At this time, as the roller 150 moves and the portion in contact with the inner circumferential surface of the cover 170 changes, the cover 170 shrinks (see Figs. 2 and 5A) toward the center of the mandrel 110, 110 (see Figs. 1 and 4A). In other words, the cover 170 can be contracted in such a manner that the diameter thereof becomes smaller, and expanded in the form of a larger diameter.

Shrinkage and expansion of the cover 170 will be described with reference to Figs. 1 to 5B. Figs. 4A and 4B are a cross-sectional view and a plan sectional view taken along the line A-A in Fig. 1, and Figs. 5A and 5B are a cross-sectional view and a plan cross-sectional view taken along line B-B in Fig.

As shown, the cover 170 may include a plurality of similarly shaped cover pieces 171, wherein the cover piece 171 is in contact with the first cover piece 172, The second cover piece 173, and the third cover piece 174 will be described as an example.

Both end faces of the first cover piece 172 to the third cover piece 174 face toward the longitudinal direction of the cover 170 and both side faces of the first cover piece 172 to the third cover piece 174 Facing the circumferential direction of the cover (170). The sides of the first cover piece 172 and the side surface of the second cover piece 173 are opposite to each other and the side surface of the second cover piece 173 and the side surface of the third cover piece 174 are mutually opposed to each other. And the side surface of the third cover piece 174 and the side surface of the first cover piece 172 are opposed to each other.

Elastic members 181 provided by coil springs or the like may be provided on both end faces of the first cover piece 172 to the third cover piece 174, respectively. One end side of each elastic member 181 is connected to a first cover piece 172 and a second cover piece 173 which are mutually adjacent to each other, a second cover piece 173 and a third cover piece 174, The first cover piece 172 and the second cover piece 173 and the third cover piece 174 of the first cover piece 174 and the first cover piece 172, 173, the third cover piece 174, and the first cover piece 172, respectively. Each of the elastic members 181 is elastically supported so that the side surfaces of the adjacent first cover piece 172 and the side surface of the second cover piece 173 are in contact with each other, 3 side surfaces of the cover piece 174 are elastically supported so that the side surfaces of the third cover piece 174 and the side surface of the first cover piece 172 come into mutual contact.

The side surface of the first cover piece 172 and the side surface of the second cover piece 173, the side surface of the second cover piece 173, the side surface of the third cover piece 174, When the side surface of the piece 174 and the side surface of the first cover piece 172 are in contact with each other (see Fig. 5A), the diameter of the cover 170 is reduced, and the cover 170 is contracted. The cover pieces 171 are pushed to the outside of the cover 170 by an external force larger than the elastic force of the elastic member 181 so that the side surfaces of the first cover piece 172 and the second cover piece 173, 2) of the cover piece 173, the side surface of the third cover piece 174, the side surface of the third cover piece 174, and the side surface of the first cover piece 172 (see Fig. 4A) 170 is larger, the cover 170 is expanded.

A support groove 171a for supporting the elastic member 181 to be stably installed may be formed on both end surfaces of the cover piece 171. One side portion and the other side portion of the elastic member 181 can be respectively inserted and supported in the support groove 171a of the first cover piece 172 and the support groove 171a of the second cover piece 173, One side portion and the other side portion of the elastic member 181 can be respectively inserted and supported in the support groove 171a of the piece 173 and the support groove 171a of the third cover piece 173 and the third cover piece 174 One side portion and the other side portion of the elastic member 181 can be inserted and supported in the support groove 171a of the first cover piece 172 and the support groove 171a of the first cover piece 172, respectively.

As described above, as the roller 150 moves and the inner peripheral surface area of the cover 170 that contacts the roller 150 is changed, the cover 170 contracts and expands.

An inclined surface 171b whose inner diameter linearly changes along the longitudinal direction of the cover 170 is formed on the inner peripheral surface of the cover piece 171 of the cover 170 on which the roller 150 is placed And the roller 150 can contact the inclined surface 171b. The inclined surface 171b may be formed to be gradually depressed from the inner circumferential surface side to the outer circumferential surface side of the cover 170. The portion of the cover 170 having the inclined surface 171b is different in thickness.

4B) of the thicker cover 170 due to the movement of the mandrel 110, the cover 170 contacts the outer side of the cover piece 171 (See FIG. 4A), and when the roller 150 contacts the portion of the inclined surface 171b of the thinner cover 170 (see FIG. 5B), the cover 170 (See Fig. 5A) by the elastic force of the elastic member 181. [

Since the roller 150 is moved by the mandrel 110, if the movement distance of the mandrel 110 is restricted, the movement distance of the roller 150 is limited, and the roller 150 moves only in the vicinity of the inclined surface 171b .

An engagement groove 171c having a predetermined length along the longitudinal direction of the cover 170 may be formed on the inner circumferential surface of the cover piece 171 of the cover 170 to limit the movement distance of the mandrel 110. [ The support frame 130 and the support frame 130 are connected to each other by a plurality of connection bars 140 and a stopper 141 inserted into the engagement groove 171c is formed in the connection bar 140 .

Then, as the mandrel 110 moves in its longitudinal direction, the stopper 141 is caught by the one end side and the other end side of the engaging groove 171c, so that the movement of the mandrel 110 is restricted, The movement of the roller 150 is restricted. At this time, if the position and length of the latching groove 171c and the position and length of the inclined surface 171b are appropriately adjusted, the roller 150 can be moved around the inclined surface 171b and its vicinity.

A method of manufacturing a composite hose using the composite hose manufacturing apparatus according to the present embodiment will be described.

First, the mandrel 110 is moved (refer to FIG. 4B) so that the roller 150 is brought into contact with the inclined surface 171b of the thick cover 170. Then, the cover piece 171 of the cover 170 overcomes the elastic force of the elastic member 181 by the roller 150 and moves to the outside of the center of the cover 170. As a result, the side surfaces of mutually adjacent cover pieces 171 are not in contact with each other, so that the cover 170 is in an expanded state (see Fig. 4A).

When the cover 170 is in an expanded state, the inner wire is spirally wound around the outer circumferential surface of the cover 170, and the covering layer is formed in such a manner as to surround the inner wire. The covering layer may include an inner layer of a rubber material, a reinforcing layer including a film of a synthetic resin film and a fibrous layer, and an outer layer of a rubber material formed to surround the reinforcing layer, but the present invention is not limited thereto. Thereafter, an outer wire is spirally wound around the outer circumferential surface of the reinforcing layer to produce a composite hose (50).

Thereafter, when the composite hose 50 is manufactured, the mandrel 110 is moved (see Fig. 5B) so that the roller 150 is brought into contact with the sloped surface 171b of the thin cover 170. Then, the cover piece 171 moves to the inside of the center of the cover 170 by the elastic force of the elastic member 181, so that the side surfaces of the adjacent cover pieces 171 come into mutual contact. Thus, the cover 170 is in a contracted state (see Fig. 5A).

5A, a clearance is formed between the inner circumferential surface of the composite hose 50 and the outer circumferential surface of the cover 170. Therefore, when the composite hose 50 is inserted into the cover 170, As shown in FIG.

The apparatus for manufacturing a composite hose according to an embodiment of the present invention is a device for manufacturing a composite hose by expanding the cover 170 by increasing the diameter of the cover 170 and then winding the components of the composite hose 50 around the outer surface of the cover 170 Thereby manufacturing the hose 50. When the composite hose 50 is completed, the diameter of the cover 170 wound with the composite hose 50 is reduced, and the cover 170 is contracted. Since the gap is formed between the outer circumferential surface of the cover 170 and the inner circumferential surface of the composite hose 50, the composite hose 50 can be easily separated from the cover 170. Therefore, the manufacture of the composite hose 50 is convenient.

The composite hose manufactured by the composite hose manufacturing apparatus according to an embodiment of the present invention is separated without friction with the cover 170 of the composite hose manufacturing apparatus. Thus, the pitch of the inner wires constituting the inner circumferential surface side of the composite hose is uniform, and the inner circumferential surface side of the covering layer is not damaged, thereby improving the reliability of the composite hose.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Will be clear to those who have knowledge of. Therefore, the scope of the present invention is defined by the appended claims, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be interpreted as being included in the scope of the present invention.

110: mandrel
130: Support frame
140: connection bar 141: stopper
150: roller
170: cover
171: Cover piece 171a: Support groove
171b: inclined surface 171c:
172: first cover piece 173: second cover piece
174: third cover piece
181: Elastic member
50: Composite hose

Claims (8)

A mandrel of a hollow body;
A plurality of rollers rotatably provided on the outer surface side of the mandrel along the circumference of the mandrel;
The mandrel is provided in a form to surround the mandrel and is concentric with the mandrel. The inner surface of the mandrel is in contact with the outer peripheral surface of the roller, the composite hose is wound on the outer surface of the mandrel. When the mandrel moves along the longitudinal direction to move the roller, And a cover which is in contact with an outer circumferential surface of the mandrel is contracted inside the center of the mandrel or expanded outside the center of the mandrel. The method according to claim 1,
Wherein the mandrel and the cover are formed in a cylindrical shape,
A ring-shaped support frame is provided on an outer peripheral surface of the mandrel along the circumferential direction of the mandrel,
And a plurality of said rollers are rotatably installed on said support frame. The method according to claim 1,
Wherein the cover comprises a plurality of cover pieces in the form of an arc formed in the same manner. The method of claim 3,
The cover pieces facing the longitudinal direction of the cover are elastically supported on both end faces so that the side faces of one of the cover pieces facing each other in the circumferential direction of the cover and the side faces of the other one of the cover pieces come into mutual contact An elastic member is provided,
The cover is contracted when the side surfaces of one of the cover pieces adjacent to each other by the elastic member and the side surfaces of the other one of the cover pieces are in contact with each other,
Wherein the cover is pushed outwardly of the cover by the movement of the roller so that the cover is expanded when the side surfaces of one of the adjacent cover pieces and the side surfaces of one of the adjacent cover pieces are not in contact with each other. Device. 5. The method of claim 4,
Wherein an inner surface of the cover is formed with an inclined surface whose inner diameter linearly changes along the longitudinal direction of the cover,
Wherein the roller is moved by the mandrel and is in contact with the inclined surface. The method of claim 3,
A plurality of support frames are provided inside the cover member,
The support frames adjacent to each other are interconnected by a plurality of connection bars,
Wherein the cover has a latching groove having a predetermined length along the longitudinal direction of the cover,
Wherein the connecting bar is formed with a stopper inserted into the latching groove to limit the moving distance of the mandrel. 5. The method of claim 4,
Wherein both ends of the cover member are formed with support grooves into which the elastic members are inserted and supported,
Wherein one side of the elastic member is inserted and supported in the support groove of any one of the adjacent cover pieces and the other side of the elastic member is inserted and supported in the support groove of the other cover piece. . A composite hose manufactured by the composite hose manufacturing apparatus according to any one of claims 1 to 7.
KR1020170074593A 2017-06-14 2017-06-14 Apparstus for manufacturing composite hose and composite hose manufactured by the apparatus KR101978478B1 (en)

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KR1020170074593A KR101978478B1 (en) 2017-06-14 2017-06-14 Apparstus for manufacturing composite hose and composite hose manufactured by the apparatus
PCT/KR2018/006668 WO2018230948A1 (en) 2017-06-14 2018-06-12 Composite hose manufacturing device and composite hose manufactured thereby

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JPH0516261A (en) * 1991-07-17 1993-01-26 Yokohama Rubber Co Ltd:The Expansion-contraction mandrel and manufacture of molded hose using the mandrel
JPH09509107A (en) * 1993-08-06 1997-09-16 ブランデンブルガー パテントフェルヴェルトゥングスゲゼルシャフト デス ビュールゲルリッヒェン レヒツ Tubular lining hose and its manufacturing method and device
KR20110123647A (en) * 2010-05-07 2011-11-15 가부시키가이샤 스기노 마신 Pipe expanding tool
KR20160062005A (en) * 2013-09-26 2016-06-01 던롭 오일 앤드 마린 리미티드 A method of hose construction

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