WO2012021043A2

WO2012021043A2 - Method for manufacturing a pipe

Info

Publication number: WO2012021043A2
Application number: PCT/KR2011/005976
Authority: WO
Inventors: 최원종
Original assignee: 주식회사 태극레포츠
Priority date: 2010-08-12
Filing date: 2011-08-12
Publication date: 2012-02-16
Also published as: WO2012021043A3

Abstract

The present invention relates to a method for manufacturing a pipe, comprising: a rolling step of arranging a plurality of carbon threads such that the carbon threads tightly contact an outer surface of a mandrel; a heat-molding step of heating the mandrel in a furnace so as to compressively heat the carbon threads such that the latter are molded into a pipe; and a drawing step of removing a compression tape from the molded pipe, and separating the pipe from the mandrel.

Description

Pipe manufacturing method

The present invention relates to a pipe manufacturing method, and more particularly, to a pipe manufacturing method that can maintain the maximum strength and light weight compared to the prior art.

Pipes are currently used in various fields. Examples include fishing rods, golf clubs, badminton, hiking sticks, ski sticks, archery arrows, bicycles, tent poles, kayaks and canoes, yacht poles, umbrella poles, umbrella poles and parasol poles.

The various types of pipes as described above were conventionally made of metal and glass or carbon.

For example, in the case of a fishing rod, glass or carbon was mainly used as a main material conventionally.

By the way, the fishing rod made of glass material has the advantage of good flexibility, strong tensile strength, while having a very heavy weight disadvantage. On the other hand, the fishing rod made of carbon material has the advantage of being light and strong in resilience due to elasticity, while the tensile strength is very inferior to the fishing rod made of glass material, and the impact resistance is weak so that it is easily broken even in a small impact. have.

On the other hand, most people who enjoy fishing tend to prefer carbon-based fishing rods that are lighter and more elastic than glass-made fishing rods. Are being produced.

Conventionally, a fishing rod, that is, a method of manufacturing a pipe using a carbon material will be described below.

First, the carbon fabric, which is a raw material, is cut to fit the size of a pipe (fishing rod) to be molded, and the cut carbon fabric is brought into close contact with a mandrel to form a pipe. The mandrel with carbon fabric tightly inserted into a pipe shape is put into a heating furnace to heat-form the pipe, and the heat-formed pipe is separated from the mandrel to finally manufacture a desired product through a pipe cutting process, a joining process and a painting process. .

One of the typical methods for reinforcing the strength of the pipe made of carbon material is as follows. That is, it is a kind of aramid fiber made of kelephthalic acid chloride and paraphenylenediamine and has a very high tensile strength.It is a brand name of a product developed by DuPont, Kevlar, which is mainly used as a bulletproof material. Known) Carbon can be manufactured using Kevlar's high tensile strength by manufacturing pipes by weaving the fibers with carbon fibers and heat-forming them, or by manufacturing the pipes by heating the Kevlar fabrics in close contact with the carbon fabric. It is known that the strength of the pipe made of a material is reinforced.

However, the conventional pipe manufacturing method as described above, because the thickness of the Kevlar fiber woven with carbon fiber or the Kevlar fabric in the form of a woven fabric in close contact with the carbon fabric for the strength of the pipe is very thick, for example, from the fishing rod Each fishing rod is formed into a very thick shape, or carbon fabric is eccentrically wound on the cross section when winding up on the fishing rod, and it is difficult to apply to the work process. When there is a cross between a part and a part that is not, there is a problem that the pipe (fishing rod) is broken in one of them.

In addition, the Kevlar fabric in the form of a fabric is heavy and very expensive, so it is possible to improve the overall strength of the pipe made of carbon material, but it is not possible to achieve lightweight, which is the most unique characteristic of the pipe made of carbon material. In addition, the manufacturing cost of the pipe is increased to give an economic burden to the general consumer, there is a problem that the overall practicality except the aspect of improving the strength.

In addition, conventionally, when the work is wound around the carbon fabric, there is a problem such that the pipe is easily broken because the load is concentrated on one side when it is wound eccentrically.

The present invention has been made in view of the above, and an object thereof is to provide a method for manufacturing a pipe that can be reduced in weight while maintaining maximum strength while improving a manufacturing cost.

In addition, the present invention was conceived in view of the above, by using a carbon yarn to fundamentally solve the eccentricity generated when winding the carbon fabric to improve the pipe to prevent the broken by eccentric load Its purpose is to provide a method of manufacturing.

Pipe manufacturing method of the present invention for achieving the above object, the rolling step of arranging a plurality of carbon yarn in close contact with the outside of the mandrel; A taping step of arranging a compression tape on an outer side of the carbon yarn disposed on the mandrel; A heating molding step of heating the mandrel in a heating furnace to compressively heat the carbon yarn to form a pipe; And a drawing step of separating the compressed tape from the primitive shaped pipe and separating the pipe from the mandrel.

The method of claim 1, wherein the rolling step comprises the steps of: arranging the plurality of carbon yarns linearly in the longitudinal direction from one end to the other end of the mandrel on the outer circumferential surface of the mandrel; It is preferable to include; winding the carbon yarn on the outer surface of the mandrel spirally.

The rolling step may include preparing a mandrel formed on an outer circumferential surface of a pattern forming groove extending in a length direction from one end to the other end, and arranging a plurality of carbon yarns in a straight line to fill the pattern forming groove of the mandrel. Steps; It is preferable to include; winding the carbon yarn in a spiral so as to cover the straight carbon yarn.

In addition, the mandrel has a shape in which the outer diameter gradually increases from one end to the other end, and the disposing step is a basic arrangement in which the plurality of carbon yarns are arranged linearly at regular intervals in the circumferential direction on the outer circumferential surface of the mandrel. Steps; And a further arrangement step of arranging a plurality of carbon yarns at a predetermined interval in the circumferential direction in a straight line from the point where the space between the carbon yarns arranged in the basic arrangement step is spaced apart from the other end of the mandrel. Is preferably made a plurality of times in steps up to the other end of the mandrel until the gap between the carbon yarn is filled.

Further, in the spiral winding, it is preferable to wind the carbon yarn in two directions along the spiral direction of each of the opposite directions crossing each other.

In addition, the polishing step of polishing the outer peripheral surface of the pipe separated from the mandrel; And a coating step of applying a color and a waterproofing liquid to the outer periphery of the polished fishing rod.

According to the pipe manufacturing method of the present invention, by using a carbon yarn directly without using a carbon fabric as in the prior art, the process required when using a carbon fabric as in the conventional (weaving carbon fabric, woven fabric Since it is possible to omit the cutting process according to the mandrel and winding the cut carbon fabric in the mandrel), there is an advantage that the manufacturing time can be shortened and the manufacturing cost can be reduced by a simple process.

In addition, it is possible to fundamentally solve the problem that the eccentric load is generated by the overlapped portion when winding the carbon fabric in the related art, there is an advantage that can solve the problem such as the pipe broken by the eccentric load.

Therefore, there is an advantage in that it is possible to provide a pipe with improved quality at a low price as well as maintaining strength while being lightweight.

In addition, since the pipe is manufactured by weaving carbon yarns on the outer surface of the mandrel, grooves can be formed in the longitudinal direction on the outer surface of the mandrel, and after only partially arranging carbon yarns in the grooves, By arranging the carbon yarns throughout the mandrel, it is possible to eventually make the pipes of a different overall thickness. Therefore, it is possible to simultaneously integrally form the protruding pattern extending in the longitudinal direction of the pipe on the inner surface of the pipe. Accordingly, by forming the protruding pattern integrally with the inner surface of the pipe as described above, there is an advantage in that the reliability of the product can be improved by improving the rigidity of the pipe and improving the bending property (elasticity).

1 is a block diagram illustrating a pipe manufacturing method according to an embodiment of the present invention.

2 is a perspective view showing a state in which a carbon yarn is wound on the outer side of the mandrel.

3 to 6 are schematic views for explaining various embodiments of arranging carbon yarns outside the mandrel.

7 is a perspective view showing a state in which the compression tape is taped after the carbon yarn is wound around the mandrel.

8 and 9 are views for explaining a method of manufacturing a pipe having a non-circular cross-sectional shape by weaving carbon yarns on the outside thereof using a different type of mandrel.

FIG. 10 is a cross-sectional view illustrating a pipe having a cross-sectional shape different from that of the pipe illustrated in FIG. 9.

Hereinafter, a pipe manufacturing method according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1, the pipe manufacturing method according to an embodiment of the present invention, rolling step (S10), taping step (S20), heat forming step (S30), drawing step (S40), polishing step (S50), coating Step S60 and commercialization step S70 are provided.

First, in the rolling step (S10), as shown in Figure 2, after coating the epoxy resin on the surface of the mandrel 100 corresponding to the molding die, carbon yarn 200; carbon on the outer peripheral surface of the mandrel 100 Yarn for weaving the fabric) is arranged in multiple layers, that is, wound.

Here, the mandrel 100 has a configuration in which the outer diameter is gradually expanded from one end 110 to the other end 120.

In the rolling step (S10) to the mandrel 100 of the shape as described above, it is preferable to specifically wound the carbon yarn 200 by the following specific method.

That is, in the rolling step (S10), as shown in Figure 3, the carbon yarn 210 is arranged in a straight line on the outer peripheral surface from one end 110 to the other end 120 of the mandrel 100, the mandrel 100 It is basically arranged at regular intervals in the circumferential direction of

At this time, the mandrel 100 is configured to expand the outer diameter from one end 110 to the other end 120, the carbon yarn 210 in one end 110 in close contact with no gap in the circumferential direction to the other end in a straight line When the arrangement is basically, a gap G is generated between the carbon yarns 210 from a predetermined distance.

Then, another carbon yarn 210 'is additionally arranged up to the other end 120 using the starting point where the gap G is generated as described above. At this time, the carbon yarn 210 'used has a shorter length than the carbon yarn 210 disposed in the basic arrangement step.

In addition, even when the carbon yarn 210 'and the carbon yarn 210 arranged basically are approached toward the other end 120 by a predetermined distance, a gap is generated. Therefore, the carbon yarn 200 is covered to cover the entire outer circumferential surface of the mandrel 100 by repeatedly filling and filling the carbon fabric shorter than the carbon yarn 210 'from the point where the gap is generated. It can be arranged in a straight line.

Next, in the rolling step (S10), after placing the carbon yarn 210 in a straight line as described above, as shown in Figure 4, the carbon yarn 220 is wound around the mandrel 100. That is, by wrapping the carbon yarn 220 on the outer circumference of the mandrel 100 so as to cover the carbon yarn 210 previously disposed on the outer circumferential surface of the mandrel 100, the carbon yarn 200 can be arranged in multiple layers. The thickness, that is, the number of laminations is not limited, and may be variously selected and applied according to the application or size in which the pipe is used.

Areas where pipes are applied include fishing rods, golf clubs, badminton, hiking sticks, ski sticks, archery arrows, bicycles, tent poles, kayaks and canoes, yacht poles, umbrella poles, umbrella poles and parasol poles. In addition, it can be applied in various fields.

That is, in the rolling step (S10) as a step of determining (adjusting) the thickness of the pipe, for example, when molding a relatively thin portion, such as a fishing rod of a fishing rod, a long shape of only one layer of carbon yarn 200 It can be molded into. And when molding a relatively thick portion, such as the handle of the fishing rod, as shown in Figures 4 and 5, the carbon yarn 200 is wound in the mandrel 100 in multiple layers to form a long shape. It becomes possible.

In addition, the wound carbon yarn 220 may be wound spirally on the outer side of the mandrel 100, as shown in Figure 4, or may be wound in a circular band shape, as shown in FIG. In addition, as shown in FIG. 6, even when spirally wound, it can also be made to appear in a zigzag form on a plane by spirally winding in double in each direction crossing each other.

In addition, in the embodiment of the present invention, after arranging the carbon yarns 210 in a straight line, the carbon yarns 220 are spirally wound and stacked thereon, for example, but this is merely an example, and the stacking order thereof. May be interchanged with each other, and may be selectively selected and applied.

After the carbon yarn 200 is disposed on the mandrel 100 as described above, the carbon yarn 200 is subjected to a taping step S20 of winding the compression tape 300 (see FIG. 6) on the outside of the carbon yarn 200. . At this time, since the adhesive tape is attached to the portion in contact with the carbon yarn 200, the compression tape serves to press the carbon yarn 200 while mutually bonding. In this case, in general, when the carbon yarn 200 is heat treated, it is preferable to tape the heat shrinkable film (compression tape) in a spiral manner so as to be more uniformly compressed.

After the taping step (S20) as described above, in a state in which the mandrel 100 wound with the carbon yarn 200 is inserted into a heating furnace (not shown), a time set at a temperature of about 100 ° C. or more (3 hours) By heating over), the carbon yarn 200 is molded into a pipe by heat, and undergoes a heat forming step (S30) to maintain a predetermined strength and elasticity. The thermoplastic resin contained in the carbon yarn 200 through the heat forming step (S30) is expanded by heat to be molded together with carbon, and the remaining amount of the resin liquid flows out between the gaps of the compression tape 300 for molding to form a pipe. It becomes possible.

On the other hand, the heating molding temperature and the heating molding time can be changed in various ways depending on the application and application of the pipe.

Next, after the heat forming step (S30), the drawing step (S40) is performed. In the drawing step S40, the heat-formed pipe is separated from the mandrel, and the compression tape 300 is peeled off from the pipe.

Next, in the polishing step (S50) to smoothly polish the outer periphery of the pipe drawn as described above using a polishing device (not shown). That is, the adhesive tape of the pressure tape and the bumpy surface caused by the resin molding are smoothly polished when the compression tape 300 is wound.

After the polishing step S50, the surface of the pipe is pigmented, powdered pearl or sticker using a brush, or repeatedly sprayed several times using a spray to form a coating layer (S60) Rough At this time, it is possible to improve the waterproof and strength of the pipe through the painting, and by adding the color can be beautifully implemented visual appearance of the pipe. In addition, it is possible to apply the liquid required for various coatings and the specific example of such a coating step (S60) does not limit the present invention.

Finally, after the coating step (S60), the pipe is cut according to the application-specification standards, it is possible to manufacture the final desired product by assembling the cut parts connected (S70). Since the commercialization step (S70) as described above can be easily understood by those skilled in the art from a general known technology known for each application field, detailed description thereof will be omitted.

Meanwhile, in the pipe manufacturing method described in the embodiment of the present invention, a pipe having a shape in which the outer diameter gradually decreases from one end to the other is illustrated and described as an example, but this is merely illustrative, and the outer diameter constant from one end to the other end is illustrated. It is to be understood that a pipe having a structure having a structure may be manufactured by the same manufacturing method.

In addition, the cross-sectional shape of the pipe should be understood to be variously implemented, such as circular, non-circular, etc., the invention is not limited by the cross-sectional shape.

In addition, with reference to Figures 8 and 9 will be described another embodiment of the rolling step (S10) as follows. That is, referring to FIG. 8, a pattern forming groove 101 is formed on the outer circumferential surface of the mandrel 100 ′ from one end 110 to the other end 120 of the mandrel 100 ′ along the circumferential direction. The carbon yarn 200 is disposed on the outer surface of the mandrel 100 ′ so as to cover the outer surface of the mandrel 100 ′ having such a configuration, and the pipe is woven. Specifically, the carbon yarn 210 is first placed in the groove portion 101 of the mandrel 100 ′ in a straight line to fill the groove portion 101 with the carbon yarn 210 first. Fill the grooves 101 with carbon yarns 210 so as to have a height (thickness) corresponding to the outermost side of the mandrel 100 ', and then carbon yarns in a circular or spiral or zigzag shape to intersect the carbon yarns 210. The 220 is disposed outside the carbon yarn 210. Of course, when arranging the carbon yarn 210 in a straight line, it is basically arranged to fill the groove 101, and then the carbon yarn in a straight line to cover the entire outer surface of the mandrel 100 'including the groove 101. After further arranging 210 to a predetermined thickness, a structure in which the carbon yarn 220 is finally arranged to intersect the carbon yarn 210 is also possible. After the rolling process of arranging the carbon yarn 200 outside the mandrel 100 ′ having the grooves 101 by the above-described method, the respective processes S20, S30, and S40 are performed. As shown in the drawing, the drawn pipe 400 has a protruding pattern 403 protruding in the longitudinal direction of the pipe 400 on its inner surface 401. As such, by forming the protruding pattern 403 integrally from one end of the pipe 400 to the other end of the pipe 400 from the inner surface 401 of the pipe 400, the rigidity of the pipe 400 can be improved and the elastic force during bending or deformation. Can improve the reliability of the product. That is, in the past, since the pipe was manufactured using a method of winding a woven fabric directly on a mandrel, it was very difficult to form a projection pattern for improving rigidity on the inner surface of the pipe, but as in the embodiment of the present invention, carbon When the pipe 400 is manufactured by directly weaving the yarn 200, the inner surface of the pipe 400 can be manufactured in various shapes. That is, as shown in Figure 10, it is also possible to manufacture the pipe 400 'the inner surface 405 is formed in a comb pattern in the longitudinal direction, in addition to being able to process the inner surface of the pipe in various patterns In addition, the rigidity of the finished pipe can be improved, as well as the flexibility (elasticity) can be improved, while the thickness can be made thinner than before, and the rigidity can be further improved, thereby making the product lighter and reducing the manufacturing cost. There is an advantage to this.

Meanwhile, in the embodiment of the present invention, the rolling in the rolling step is to be understood as being used as a meaning including both a method of winding the carbon yarn on the outside of the mandrel and a method of directly knitting the carbon yarn on the mandrel.

While the invention has been shown and described in connection with preferred embodiments for illustrating the principles of the invention, the invention is not limited to the construction and operation as shown and described. Rather, those skilled in the art will appreciate that many modifications and variations of the present invention are possible without departing from the spirit and scope of the appended claims.

Claims

A rolling step of placing a plurality of carbon yarns in close contact with the outside of the mandrel;

A taping step of arranging a compression tape on an outer side of the carbon yarn disposed on the mandrel;

A heating molding step of heating the mandrel in a heating furnace to compressively heat the carbon yarn to form a pipe;

And a drawing step of separating the compressed tape from the molded pipe and separating the pipe from the mandrel.
The method of claim 1, wherein the rolling step,

Arranging the plurality of carbon yarns linearly in the longitudinal direction from one end to the other end of the mandrel on an outer circumferential surface of the mandrel;

Spirally winding the carbon yarn on the outer surface of the mandrel; Pipe manufacturing method comprising a.
The method of claim 1, wherein the rolling step,

Preparing a mandrel formed on an outer circumferential surface of a pattern forming groove extending from one end to the other end in a longitudinal direction, and arranging a plurality of carbon yarns in a straight line to fill the pattern forming groove of the mandrel;

And spirally winding the carbon yarn so as to cover the straight carbon yarn.
The method according to claim 1 or 2,

The mandrel has a shape in which its outer diameter gradually increases from one end to the other end,

The disposing step,

A basic arrangement step of arranging the plurality of carbon yarns in a straight line at uniform intervals in the circumferential direction on the outer circumferential surface of the mandrel;

And a further arrangement step of arranging a plurality of carbon yarns at a predetermined interval in the circumferential direction in a straight line from the point where the space between the carbon yarns arranged in the basic arrangement step is spaced apart from the other end of the mandrel.

The further arrangement step,

Pipe manufacturing method characterized in that a plurality of steps are made up to the other end of the mandrel until the gap between the carbon yarn is filled.
The method of claim 1 or 2, wherein in the spiral winding step,

Pipe winding method characterized in that the carbon yarn is wound in duplicate along each of the spiral direction of the opposite direction to cross each other.
The method according to claim 1 or 2,

Polishing the outer circumferential surface of the pipe separated from the mandrel; And

And a coating step of applying a color and a waterproofing liquid to the outer periphery of the polished fishing rod.