KR101826018B1 - Apparatus and method for molding of high pressure hose - Google Patents

Abstract

The present invention relates to a molding apparatus and a molding method of a high pressure hose. The molding apparatus of a high pressure hose comprises: a molding device inserted into an extruded hose before molding, and transformed freely; a curing device for accommodating the hose before molding, into which the molding device is inserted and which is transformed to be curved, while the shape of the hose before molding is maintained; and a high temperature chamber for spraying high temperature and high pressure steam to the curing device to perform curing and molding in a curved shape. The molding method comprises: a step of extruding a hose before molding; a step of inserting the molding device into the hose before molding, and transforming the hose before molding into a curved shape; a step of accommodating the hose before molding in the curing device, and closing the shape; a step of expanding the hose before molding by injecting air through the front end and/or the rear end of the curing device; a step of performing molding by curing the curing device in the high temperature chamber for a set period of time; and a step of separating the hose molded in the curved shape by freezing and opening the curing device. According to the present invention, a high pressure hose in a curved shape can be simply molded and produced.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a high-

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molding apparatus and a molding method for a high-pressure hose, and more particularly, to a molding apparatus and a molding method capable of simply molding a high-pressure hose having a curved shape.

Generally, high-pressure hoses made of rubber are widely used as a passage for fluid (air, water, oil, etc.) in engines, pneumatic equipment, and hydraulic equipment used in automobiles, ships or various industrial facilities.

Such a high-pressure hose usually has a structure in which a rubber layer is formed on the outer and / or inner surface of a reinforcing layer made of high-tensile fibers or the like, and is extruded linearly in an extruder. The extruded hose is molded into a rod- And vulcanized in a vulcanization chamber under a high temperature and a high pressure so as to be molded into a shape like the curvature of a mold.

1A through 1C show a process of forming a high-pressure hose in a curved shape in a conventional manner. First, as shown in FIG. 1A, a hose extruded linearly by an extruder and a mold having a curved rod shape are provided And the hose is press-fitted into the mold as shown in FIG. 1 (b), and vulcanized in a vulcanization chamber or the like under high temperature and high pressure to harden the hose.

In this state, when the operator pulls the cured hose out of the mold and pulls it out, the hose is formed into a curved shape corresponding to the shape of the mold as shown in Fig. 1C. The thus formed high- Equipment, hydraulic equipment, and the like, so as to be used as a fluid passage.

As shown in FIGS. 1A to 1C, after the hose 10 is press-fitted into the bent mold 20, the molded high pressure hose 30 is molded by the high temperature and high pressure, The ductility of the high-pressure hose 30 is weakened and the hardness of the high-pressure hose 30 is increased, so that the separation operation is very difficult.

That is, conventionally, in order to separate the high-pressure hose manufactured by being molded in the mold in the state of being pressed from the mold, it is very difficult for the worker to separate the high-pressure hose by pulling it by applying a very great force. There is a problem in that the high-pressure hose cured during the separation is broken, which causes defects.

Korea patent registration No. 1301844 (2013.08.23.)

SUMMARY OF THE INVENTION It is an object of the present invention to provide a molding apparatus and a molding method capable of simply molding a high-pressure hose having a curved shape.

That is, a technical problem to be solved by the present invention is to provide a high-pressure hose molding device and molding method capable of improving workability and minimizing a defective rate by simply forming a high-pressure hose having a bent shape in various shapes .

The problems of the present invention are not limited to the above-mentioned problems, and other problems not mentioned can be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention, there is provided an apparatus for molding a high-pressure hose, comprising: a molding machine to be inserted into an extruded hose before molding to perform free deformation; A preforming hose in which the molding machine is inserted and is bent and deformed; And a high-temperature chamber for injecting high-temperature and high-pressure steam into the curing device to cure the material in a curved shape so as to perform molding.

In this case, the molding machine includes: a plurality of link members connected in the longitudinal direction by a ball joint method; a plurality of pressing members which are radially branched from a peripheral surface of the link member; And a plurality of link members each having a ball portion formed at one end thereof and a socket portion formed at the other end thereof so that the link members adjacent to each other are engaged with each other in such a manner that the socket portion receives the ball portion .

The movable mold includes a stationary mold having a first seating recess formed on one surface thereof and a variable mold having a second seating recess formed at a position corresponding to the first seating recess, And a fixing hole is formed at a position corresponding to the fixed mold and the variable mold, and the fixing hole is fastened by a coupling member so that the fixing mold and the variable mold can be fixed while being closed.

Here, the fixed mold and the variable mold constituting the curing unit may each have a heat transfer groove formed inward from the outer surface toward the first seating recess and the second seating recess.

In addition, it is preferable that the air conditioner further comprises a blocking member for blocking the front end, the rear end, the front end and the rear end of the pre-molding hose in a state where the pre-molding hose is accommodated in the curing device, A nozzle for injecting and expanding can be formed.

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According to another aspect of the present invention, there is provided a method of molding a high-pressure hose, the method comprising: (a) extruding a hose before molding; (b) inserting the molding machine into the pre-molding hose to deform the shape to be bent; (c) receiving the pre-molding hose in the curing machine and then molding the mold; (d) inflating the pre-molding hose by injecting air through the front end, the rear end, the front end, and the rear end of the biosensor; (e) curing the curing machine in the high-temperature chamber for a predetermined period of time; And (f) cooling the cuvette, and then opening it to separate the high-pressure hose formed into a curved shape.

In this case, the step (c) may further include discharging the molding machine from the pre-molding hose.

Other specific details of the invention are included in the detailed description and drawings.

According to the molding apparatus and the molding method for the high-pressure hose according to the embodiment of the present invention, it is possible to manufacture the high-pressure hose having a curved shape by simply molding.

That is, a high-pressure hose having a bent shape in various shapes can be manufactured by simply molding, thereby improving the workability and minimizing the defective rate.

The effects according to the present invention are not limited by the contents exemplified above, and more various effects are included in the specification.

1A to 1C are perspective views sequentially illustrating a process of molding a high-pressure hose in the related art.
BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a hose for a high pressure hose, and more particularly to a hose for a high pressure hose.
3 is a sectional view taken along the line AA in Fig.
FIG. 4 is a perspective view showing an example in which the molding machine of FIG. 2 is bent and bent. FIG.
Fig. 5 is a perspective view of the hose before the molding of the high-pressure hose in which the molding machine is inserted. Fig.
6 is an exploded perspective view of a bilateral hose in a high-pressure hose molding apparatus according to an embodiment of the present invention.
FIGS. 7A to 7D are perspective views sequentially illustrating a process of forming a curved high-pressure hose using the curing apparatus of FIG. 6;
8 is a perspective view of a high-pressure hose formed using a molding apparatus for a high-pressure hose according to an embodiment of the present invention;
FIG. 9 is a process flow chart sequentially showing a method for molding a high-pressure hose according to an embodiment of the present invention. FIG.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and the manner of achieving them, will be apparent from and elucidated with reference to the embodiments described hereinafter in conjunction with the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

Thus, in some embodiments, well known process steps, well-known structures, and well-known techniques are not specifically described to avoid an undue interpretation of the present invention.

The terminology used herein is for the purpose of illustrating embodiments and is not intended to be limiting of the present invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. It should be understood that the terms comprising and / or comprising the terms used in the specification do not exclude the presence or addition of one or more other components, steps and / or operations other than the stated components, steps and / . And "and / or" include each and any combination of one or more of the mentioned items.

Further, the embodiments described herein will be described with reference to the perspective view, cross-sectional view, side view, and / or schematic views, which are ideal illustrations of the present invention. Thus, the shape of the illustrations may be modified by manufacturing techniques and / or tolerances. Therefore, the embodiments of the present invention are not limited to the specific forms shown, but also include changes in the forms generated according to the manufacturing process. In addition, in the respective drawings shown in the embodiments of the present invention, the respective constituent elements may be somewhat enlarged or reduced in view of convenience of description.

Hereinafter, a molding apparatus and a molding method of a high-pressure hose according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

2 is a perspective view showing a molding machine for inserting into a hose of a high-pressure hose before molding of a high-pressure hose to maintain its shape in a molding apparatus for a high-pressure hose according to an embodiment of the present invention, FIG. 3 is a cross- And FIG. 4 is a perspective view illustrating an example in which the molding machine of FIG. 2 is bent and bent.

2 to 4, the molding apparatus for the high-pressure hose 500 according to the embodiment of the present invention is provided with a molding machine, which is inserted into the hose 300 before molding and can freely deform based on the longitudinal direction, (100) may be provided.

The molding machine 100 includes a plurality of link members 110 connected in the longitudinal direction by a ball joint method, a plurality of pressing members 120 branched radially from the circumferential surface of each link member 110, And a rolling member 130 rotatably installed at the ends of the plurality of pressing members 120. [

3, the plurality of link members 110 include a ball portion 112 having a predetermined diameter at one end and a ball portion 112 of another adjacent link member 110 at the other end, The link members 110 adjacent to each other may have a structure in which the ball portion 112 and the socket portion 114 are coupled to each other so that the socket portion 114 can be folded And can be made in a combined configuration.

At least two of the link members 110 may be connected to form a free shape so as to be bent in various shapes. In the drawings for supporting the embodiment of the present invention, five link members 110 are all connected It is to be understood that the present invention is not limited to the above-described embodiment, but may be modified in many ways.

For example, when an external force equal to or greater than a set magnitude is applied to the ball portion 112 and the socket portion 114, which are coupled to each other, the ball portion 112 and the socket portion 114, It is preferable that a rotation force is generated in the rotor 114, and when an external force equal to or less than the set magnitude is applied, the rotor has a coupling force that is not rotated by the frictional force.

Accordingly, as the operator rotates the coupling portions of the plurality of link members 110, that is, the coupling portion between the ball portion 112 and the socket portion 114, the molding machine 100 is rotated in the longitudinal direction It is possible to deform the shape so as to have various bent shapes around the center.

A plurality of pressing members 120 which are radially branched from the link members 110 of the molding machine 100 are divided into four directions in the front, rear, left and right directions in the drawing for supporting the embodiment of the present invention However, the present invention is not limited to this, and it may be branched into three directions, six directions or eight directions, and the like. Can be added or subtracted.

Roller members 130 such as rollers are rotatably mounted at the ends of the respective pressing members 120. The rolling member 130 is inserted into the hose to be molded by the molding machine 100, When the hose is moved, it performs a sliding motion along the inner surface of the hose.

5 is a perspective view of the high-pressure hose 500 in a state where the molding machine 100 is inserted into the hose 300 before molding.

Referring to FIG. 5, the molding machine 100 having the above-described structure can be inserted into the hose 300 before it is formed into the high-pressure hose 500.

When the molding machine 100 is inserted into the hose 300 before molding, the rolling members 130 formed on the end sides of the pressing members 120 are slid along the inner surface of the hose 300 , The insertion of the molding machine 100 into the hose can be facilitated.

In this state, when the angle of the link members 110 of the molding machine 100 is rotated by the rotation of the ball portion 112 and the socket portion 114, the pre-molding hose 300 is bent as shown in FIG. 5 Shape transformation can be made.

At this time, as described above, the ball portion 112 and the socket portion 114 connecting the link members 110 are rotated when an external force equal to or greater than the set magnitude is applied, and in this state, The hose 300 is also deformed into a bent shape corresponding to the shape of the molding machine 100 by the free shape deformation of the molding machine 100 so that the shape of the hose 300 can be maintained do.

Since the rolling members 130 installed on the end sides of the pressing members 120 maintain the state of being in tight contact with the inner surface of the hose 300 before molding, the inner diameter of the hose 300, It is possible to maintain the opened state without causing any distortion according to the shape change.

The pre-molding hose 300, in which the molding machine 100 is inserted therein to maintain a state in which the shape is deformed in a curved shape, is formed as a high-pressure hose 500 by the double- This will be described as follows.

6 is an exploded perspective view of the bilayer 200 in a molding apparatus for a high-pressure hose 500 according to an embodiment of the present invention.

Referring to FIG. 6, the beam generator 200 provided in the molding apparatus of the high-pressure hose 500 according to the embodiment of the present invention includes a first seating recess 212 having a hemispherical cross- And at least one variable mold 220 having a mold 210 and a second seating recess 222 having a hemispherical cross-section as a mold for molding the fixed mold 210.

Accordingly, when the variable mold 220 is closed with respect to the stationary mold 210, the first seating recess 212 and the second seating recess 222 are overlapped with each other to form a space in which the hose 300 is seated before the molding .

Here, the first seating recess 212 and the second seating recess 222 are each formed in a hemispherical shape so as to form a circular shape when they are superimposed on each other. However, the present invention is not limited thereto, But may be formed in different shapes depending on the cross-sectional shape of the hose 300.

For reference, the bilaterals 200 provided in the molding apparatus of the high-pressure hose 500 according to the embodiment of the present invention include a stationary mold 210 having a single body, In the case of the variable mold 220, the variable mold 220 is formed of three bodies according to the bent shape. However, the present invention is not limited to this, Or formed of two or more bodies may be provided.

In addition, the fixed mold 210 may be provided with a plurality of bodies, and the variable mold 220 may be formed into a variety of shapes having different curvatures depending on the assembly because a plurality of bodies are provided.

On the other hand, screw holes 214 and 224 are formed so as to correspond to the side portions adjacent to the first seating recess 212 and the second seating recess 222 which form hemispheres in the stationary mold 210 and the variable mold 220 And an engaging member 230 such as a screw is inserted into the screw holes 214 and 224 so that the stationary mold 210 and the variable mold 220 can be fixed to each other.

That is, when the stationary mold 210 and the variable mold 220 are closed, the engaging member 230 such as a screw is coupled to the screw holes 214.224 corresponding to each other, 220 can be maintained in a state where they are coupled to each other.

Although the screw holes 214 and 224 and the engaging member 230 such as a screw have been described as one example of the engaging means as a means for fixing the stationary mold 210 and the variable mold 220, The present invention is not limited thereto, and various coupling means known in the art can be applied.

Hereinafter, a process of forming a curved high pressure hose 500 as the bilayer 200 will be described with reference to FIGS. 7A to 7D.

7A to 7D are perspective views sequentially illustrating a process of molding a high-pressure hose 500 having a curved shape using the bilge lifter 200 of FIG. 6. FIG. 7A is a perspective view illustrating a first seat of the stationary mold 210 Fig. 3 is a perspective view showing a state in which the hosel 300 is seated in the recess 212; Fig.

Here, the hose 300 is placed in the first seating recess 212 of the stationary mold 210 with the molding machine 100 inserted therein.

After the pre-forming hose 300 in which the molding machine 100 is placed is placed on the first seating concave portion 212 of the stationary mold 210 as shown in Fig. 7B, After the mold 220 is closed, the stationary mold 210 and the variable mold 220 are fixed using a coupling member such as a screw.

Next, the molding machine 100 inserted into the hose 300 before molding is held at one end and pulled out by pulling. In this case, the molding machine 100 is provided with a rolling member The rolling members 130 are slidably slid along the inner surface of the hose 300 before molding and are then discharged to the outside.

At this time, in the molding machine 100, since the plurality of link members 110 are angularly displaced by the mutual engagement of the ball portion 112 and the joints, the molding machine 100 has the curved inner pre- It is possible to easily escape like a snake.

When the molding machine 100 is discharged from the inside of the hose 300 as described above, the outer shape of the hose 300 before molding is fixed to the first seating recess 212 of the stationary mold 210 and the variable mold 220, And the inner shape of the second seating recess 222 may be somewhat deformed as the pressing force of the pressing members 120 of the molding machine 100 is released.

7D, the blocking member 250 is inserted into the front end and the rear end of the fixed mold 210 and the variable mold 220, respectively, And the air is injected through the opening 252.

A nozzle 252 for air injection is formed in one of the blocking members 250 among the blocking members 250 that are press-fitted into the fixed mold 210 and the variable mold 220, And the other blocking member 250 is not provided with a separate nozzle 252. [

When the air is injected through the nozzles 252 formed in any of the blocking members 250, the first and second seating recesses 212 and 212 of the fixed mold 210, the variable mold 220, Since the inside of the pre-molding hose 300, which is inserted into the space formed by the recess 222, is expanded as the air is injected, the inside diameter of the pre-molding hose 300, which is curved, The outer surface of the movable mold 210 maintains a state of being in close contact with the surfaces of the first and second seating recesses 212 and 222 of the stationary mold 210 and the variable mold 220, .

Here, it is preferable that a check valve is applied to the nozzle 252 formed in the blocking member 250 so that air flows only in one direction, that is, from the outside to the inside, and is not discharged from the inside to the outside.

As described above, when the bubble generator 200 is inflated into the high-temperature chamber such as a vulcanizer in the state where the air is blown into the hose 300 before being blown, and then the bubble generator 200 is heated for a predetermined time by the high-temperature steam, And the molding is cured in the shape drawn in the bilayer 200 to be molded.

After the set time has elapsed, if the movable mold 200 is taken out of the high-temperature chamber such as a vulcanizer, cooled for a preset time, and then the stationary mold 210 of the mold 200 is separated from the movable mold 220, As shown in FIG. 8, and the molding of the high-pressure hose 500 is completed.

At this time, the inner flow path of the formed high-pressure hose 500 is formed in a circular shape with a circular cross-section, and is also cured in a state of maintaining a circular shape without crushing the outer surface.

Accordingly, the molded high-pressure hose 500 can be easily separated from the rod-shaped metal mold without separating it from the rod-shaped metal mold as conventionally, while maintaining the curved shape by the separation of the lifter 200 So that the workability of the molding can be greatly improved, and the effect of preventing the occurrence of breakage or the like can be provided.

When the hose 300 is placed on the first seating recess 212 of the stationary mold 210 of the living creator 200 with the molding machine 100 inserted therein, It is possible to facilitate separation of the molded high pressure hose 500 from the bilge vents 200.

That is, when the hose 300 is made of a rubber material, when the hose 300 is exposed to a high temperature during molding, the outer surface of the hose 300 is in contact with the inner surfaces of the first seating recess 212 and the second seating recess 222, There is a fear that the oil is melted and separated. As a result, by applying oil such as lubricating oil to the outer surface of the hose before molding as described above, such a problem can be prevented.

The fixed mold 210 and the variable mold 220 constituting the lifter 200 may be formed with heat transfer grooves 216 and 226 having a certain depth from the outer surface to a position adjacent to the seating recesses 212 and 222.

When the heat transfer grooves 216 and 226 are formed in the stationary mold 210 and the variable mold 220 of the bilayer 200 as described above, the heat is transferred to the hose 300 to be formed at a higher temperature, Thus, the efficiency of curing can be greatly improved.

9 is a process flow chart sequentially showing the molding method of the high-pressure hose 500 according to the embodiment of the present invention. In the method of molding the high-pressure hose 500 using the molding apparatus of the high-pressure hose 500 having the above- The following is a brief description.

First, a straight hose is extruded (S10) by an extruder, and after the molding machine 100 having the above-described structure is inserted into the extruded hose, a bending deformation S20 is performed in a shape to be molded.

Next, an oil such as lubricating oil is applied to the outer surface of the shape-deformed hose 300 before it is seated (S30) on the first seating recessed portion 212 and the second seating recessed portion 222 of the living body 200, The fixed mold 210 and the deformable mold 220 of the bilge lifter 200 are closed (S40).

Next, after the molding machine 100 inserted into the hose 300 before molding is discharged to the outside (S50), the front end and the rear end of the living body 200 are covered with the blocking member 250, The air is injected into the interior of the living creator 200, that is, the interior of the hose 300 before molding (S60) through the nozzle 252 formed in the blocking member 250 of the hood.

In this state, the horn 200 is taken out of the high-temperature chamber such as a vulcanizer, and then the high-temperature steam is supplied for a set time so that the hose cures (S70) And cooling of the high-pressure hose 500 is completed during the set time, and the lifter 200 is separated (S80) to complete the production of the curved high-pressure hose 500.

For reference, in the embodiment of the present invention, after the molding machine 100 is inserted into the hose 300 before molding, the molding machine 100 is discharged in a state where the molding machine 100 is accommodated in the living body 200, The high pressure hose 500 may be molded while the molding machine 100 is inserted into the hose 300 before molding and then the molding machine 100 may be discharged from the high pressure hose 500 having been molded.

It will be understood by those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

100: molding machine 110: link member
112: ball portion 114: socket portion
120: pressing member 130: rolling member
200: Yang Yang 2: Fixed mold
212: first seating recess 214,224:
216, 226: heat transfer groove 220: variable mold
222: second seating recess 230: coupling member
250: blocking member 252: nozzle
300: Before molding Hose 500: High pressure hose

Claims (7)

A molding machine inserted into the hose before extrusion to perform free deformation;
A preforming hose in which the molding machine is inserted and is bent and deformed; And
And a high-temperature chamber for injecting high-temperature and high-pressure steam into the curing machine to cure the curing agent into a curved shape to perform molding.
The method according to claim 1,
In the molding machine,
A plurality of link members connected in the longitudinal direction by a ball joint method,
A plurality of pressing members which are radially branched from a peripheral surface of the link member,
And a rolling member rotatably installed at an end of the pressing member,
Wherein the plurality of link members each have a ball portion formed at one end thereof and a socket portion formed at the other end thereof so that the link members adjacent to each other are coupled to each other in such a manner that the socket portion receives the ball portion. Device.
The method according to claim 1,
The positive-
A stationary mold having a first seating recess formed on one surface thereof so as to be bent,
And a variable mold having a second seating concave portion formed at a position corresponding to the first seating concave portion to be closed with the stationary mold,
Wherein a fixing hole is formed at a position corresponding to each other in the stationary mold and the variable mold and the fixing hole is fastened by a coupling member so that the stationary mold and the variable mold are fixed while being closed. Molding device.
The method of claim 3,
Wherein the fixed mold and the variable mold, which form the curing unit,
And a heat transfer groove recessed inward from the outer surface toward the first seating recess and the second seating recess.
The method of claim 3,
Further comprising a blocking member for shielding the front end, the rear end, the front end and the rear end of the pre-molding hose in a state where the pre-molding hose is housed in the curing device,
Wherein the blocking member is formed with a nozzle for injecting and expanding air into the pre-molding hose.
A method for molding a high-pressure hose using the high-pressure hose molding apparatus according to any one of claims 1 to 5,
(a) extruding a hose before molding;
(b) inserting the molding machine into the pre-molding hose to deform the shape to be bent;
(c) receiving the pre-molding hose in the curing machine and then molding the mold;
(d) inflating the pre-molding hose by injecting air through the front end, the rear end, the front end, and the rear end of the biosensor;
(e) curing the curing machine in the high-temperature chamber for a predetermined period of time; And
(f) cooling the cistern, and then opening the high-pressure hose to separate the high-pressure hose formed into a curved shape.
The method according to claim 6,
Further comprising, after the step (c), discharging the molding machine from the pre-molding hose.

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