JP2005050719A - Cable surface structure, manufacturing apparatus and manufacturing method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a surface structure of a cable with reduced friction characteristics of the cable.
An uneven portion 35 is formed on the surface of a sheath 19a of a cable 19 to reduce the contact area of the cable 19 without reducing the strength of the cable 19 itself.
[Selection] Figure 5

Description

* This invention relates to the surface structure of a cable for reducing the friction characteristic which a cable sheath has, its manufacturing apparatus, and a manufacturing method.

  When laying a new cable in a pipe or laying a new cable in a pipe in which an existing cable is stored, it is necessary to reduce the friction characteristics of the cable sheath.

In conventional cables, the friction properties of the cable sheath are reduced by compounding (mixing) a lubricant made of amide resin into the sheath material, or by raising the lubricant from the surface of the sheath material, so-called bleed out. Was. And in order to reduce this friction characteristic, there exists some which were disclosed by patent document 1 as a low-abrasion structure which improved slipperiness.
JP 2001-353817 A

  However, when a lubricating material is compounded with the sheath material, there is a problem in that the strength of the cable itself is reduced because the sliding material is mixed with the sheath material and a functional deterioration such as elongation and a decrease in strength occurs.

  In addition, when the sliding material is bleed out to the sheath material, when the sliding material layer formed on the surface of the sheath material is peeled off by pulling or the like, the surface of the sheath material is recovered until it has low friction characteristics. Needed recovery time. Furthermore, there has been a problem that the function is deteriorated over time due to bleeding out. This deterioration in function over time means that the low friction characteristics cannot be maintained after long-term storage, and there is also a problem that if the cable is laid after long-term storage, it cannot be laid. It was.

  The present invention has been made in view of the above, and an object thereof is to provide a surface structure of a cable with reduced frictional characteristics of the cable, a manufacturing apparatus and a manufacturing method thereof.

  The gist of the invention described in claim 1 is that an uneven portion is formed on the surface of the cable sheath in order to solve the above problems.

  In order to solve the above problems, the invention according to claim 2 is summarized in that the uneven portion is formed in a waveform in the circumferential direction of the cable sheath and is formed in the entire length direction.

  In order to solve the above problems, the invention according to claim 3 is characterized in that the concavo-convex portion is formed in a satin shape on the peripheral surface of the cable sheath.

  In order to solve the above-mentioned problems, the invention according to claim 4 is characterized in that the surface roughness of the cable sheath is in the range of 0.054 to 2.101 μm.

  In order to solve the above-mentioned problem, the invention according to claim 5 is an extrusion molding apparatus for extruding a cable, a cooling means for cooling a cable extruded from the extrusion molding apparatus, and an extrusion molding from the extrusion molding apparatus. And a surface processing device for forming an uneven portion on the surface of the sheath of the cable.

  In order to solve the above-mentioned problems, the gist of the invention according to claim 6 is that the surface processing apparatus is disposed in the water in the vicinity of the water surface of the cooling water tank containing the cooling water constituting the cooling means.

  In order to solve the above-mentioned problems, the gist of the present invention is that the surface processing apparatus is formed in a cylindrical shape and a plurality of processing rotating bodies that are rotatable with respect to each other are arranged in an annular shape.

  In order to solve the above problems, the invention according to claim 8 is characterized in that each of the plurality of processed rotating bodies has corrugated uneven portions formed in the circumferential direction in the entire length direction.

  In order to solve the above problem, the invention according to claim 9 is characterized in that each of the plurality of processed rotating bodies has a satin-like uneven portion formed on a peripheral surface thereof.

  In order to solve the above-mentioned problem, the invention according to claim 10 is characterized in that the plurality of processed rotating bodies are each provided with an uneven portion having a surface roughness in the range of 0.054 to 2.101 μm.

  In order to solve the above problems, an invention according to claim 11 is an extrusion process for extruding a cable, a cooling water immersion process for immersing the cable extruded in the extrusion process in cooling water, and the extrusion. The present invention includes a concavo-convex portion forming step of forming a concavo-convex portion on the surface of the sheath of the cable extruded in the forming step.

  According to the first aspect of the present invention, since the concavo-convex portion is formed on the surface of the cable sheath, the contact area of the cable is reduced without reducing the strength of the cable itself, and the friction characteristics and the drawing tension are reduced. As a result of the reduction, the cable laying operation can be easily performed and the extension distance can be increased.

  According to the second aspect of the present invention, since the concavo-convex portion is formed in a wave shape in the circumferential direction of the cable sheath and formed in the entire length direction, the force can be distributed in the concavo-convex portion when the cable is laid, The side pressure characteristics can be improved.

  According to this invention of Claim 3, since the uneven | corrugated | grooved part was formed in the satin form in the surrounding surface of the cable sheath, an uneven | corrugated | grooved part can be formed easily.

  According to the fourth aspect of the present invention, when the surface roughness of the cable sheath is in the range of 0.054 to 2.101 μm, the static friction coefficient and the dynamic friction coefficient can be reduced.

  According to the fifth aspect of the present invention, the cable is extruded by the extrusion molding device, the cable extruded from the extrusion molding device is cooled, and the surface of the sheath of the cable extruded from the extrusion molding device is processed on the surface. By forming the concavo-convex portion with the apparatus, it is possible to reliably and easily manufacture a cable having a reduced contact area and reduced frictional characteristics and wire tension.

  According to the sixth aspect of the present invention, since the surface processing apparatus is disposed in the water in the vicinity of the water surface of the cooling water tank, the surface temperature of the cable sheath is desirable when the uneven portion is formed on the surface of the cable sheath. The processing temperature can be set.

  According to the seventh aspect of the present invention, the surface processing apparatus is formed in a cylindrical shape, and a plurality of processing rotating bodies that are rotatable with respect to each other are arranged in an annular shape, so that the cable is connected to the annular surface processing apparatus. Since the sheath is inserted and the concavo-convex portion is formed on the surface of the cable sheath by the plurality of processing rotating bodies, the concavo-convex portion can be processed smoothly.

  According to the eighth aspect of the present invention, since the plurality of processing rotating bodies are each formed with the corrugated uneven portion in the circumferential direction in the circumferential direction, the force can be distributed in the uneven portion when laying the cable, An uneven portion with improved lateral pressure characteristics can be formed.

  According to the ninth aspect of the present invention, the plurality of processing rotating bodies can easily form the uneven portions by forming the satin-like uneven portions on the peripheral surface.

  According to the tenth aspect of the present invention, since the unevenness portions having a surface roughness in the range of 0.054 to 2.101 μm are formed on each of the plurality of processing rotating bodies, the static friction coefficient and the dynamic friction coefficient are reduced. Uneven portions can be formed.

  According to the present invention of claim 11, an extrusion process for extruding a cable, a cooling process for cooling a cable extruded in the extrusion process, and a sheath of the cable extruded in the extrusion process And a concave-convex portion forming step for forming the concave-convex portion on the surface of the cable, so that a cable with reduced contact area and reduced frictional characteristics and wire tension can be reliably and easily manufactured.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a configuration diagram showing a cable manufacturing apparatus according to an embodiment of the present invention. FIG. 2 is a plan view showing a surface processing apparatus in the manufacturing apparatus of FIG. FIG. 3 is a perspective view showing each processing rotating body of the surface processing apparatus of FIG. FIG. 4 is a process diagram showing a cable manufacturing method in the manufacturing apparatus of FIG. FIG. 5 is a perspective view showing a part of a cable manufactured by the manufacturing apparatus of FIG.

  As shown in FIG. 1, the cable manufacturing apparatus according to the present embodiment includes an extrusion molding apparatus 1, a cooling apparatus 3 as a cooling means, a surface processing apparatus 5, and a cooling water 7 as a cooling means. The tank 9 is generally constituted.

  The extrusion molding apparatus 1 has a cross head die 17 composed of a die body 11, a die 13, and a heater 15. The extrusion molding apparatus 1 is arranged in the extrusion direction of the cable 19 after the cross head die 17. The cooling device 3 for cooling the extruded cable 19 with air is provided. Further, the mandrel 21 is configured such that a metal wire serving as a tension member 23 is guided, and the tension member 23 is sent into the crosshead die 17 of the extrusion molding apparatus 1.

  The cooling device 3 has a plurality of air introduction ports 25, and guides air from these air introduction ports 25, thereby cooling the cable 19 extruded by the extrusion molding device 1.

  The surface processing device 5 forms an uneven portion on the surface of the sheath 19 a of the cable 19 extruded from the extrusion molding device 1, and is disposed in the water near the water surface of the cooling water tank 9. In the surface processing apparatus 5, as shown in FIG. 2, a plurality of processing rotating bodies 27 that can rotate with each other are arranged in an annular shape, and an insertion hole 29 through which the cable 19 is inserted is formed. Each processing rotating body 27 is formed in a cylindrical shape as shown in FIG. 3, and fine textured portions 31 having a matte shape are formed on the peripheral surface thereof. The concavo-convex portion 31 has a surface roughness set in a range of 0.054 to 2.101 μm, the surface roughness 0.054 μm represents a limit value at the time of cable formation, and the surface roughness 2.101 μm is usually “ It represents a value that is judged as “rough appearance”. In addition, when it deviates from this range, the friction characteristic of the cable 19 cannot be reduced.

  The cooling water tank 9 containing the cooling water 7 contains cooling water for immersing and cooling the cable 19 extruded by the extrusion molding device 1, and is continuously extruded into the cooling water tank 9. A plurality of rollers 33 for guiding the feeding direction of the incoming cable 19 are arranged at appropriate positions.

  Next, with reference to FIGS. 1-3, the manufacturing method of the cable of this Embodiment is demonstrated.

  First, as shown in FIG. 1, a metal wire that becomes the tension member 23 is introduced into the mandrel 21 and fed into the crosshead die 17 of the extrusion molding apparatus 1. Next, the cable 19 is formed by extruding plastic from the die 13 provided on the crosshead die 17 onto the metal wire. The temperature of the cable 19 at this time is about 160 to 200 ° C. Thereafter, the cable 19 is cooled to a predetermined temperature by the cooling device 3.

  Furthermore, the cable 19 cooled by the cooling device 3 is immersed in the cooling water of the cooling water tank 9 and further cooled, and at the same time, the cable 19 is inserted into the insertion hole 29 of the surface processing device 5 to form a satin finish in the processing rotating body 27. The fine uneven portion 31 forms a satin-like fine uneven portion 35 on the peripheral surface of the sheath 19 a and is continuously pushed out into the cooling water tank 9.

  Next, the cable 19 having the concavo-convex portion 35 formed on the peripheral surface of the sheath 19 a is sufficiently cooled by the cooling water 7 in the cooling water tank 9, while the feeding direction of the plurality of rollers 33 disposed in the cooling water tank 9 is It is guided and sent out of the cooling water tank 9.

  Therefore, the manufacturing method of the cable 19 in the present embodiment includes an extrusion process P1 for extruding the cable 19 as shown in FIG. 4, and the cable 19 extruded in the extrusion process P1 by the cooling device 3. Cooling step P2 that cools to a predetermined temperature and cools by immersing in cooling water 7 and formation of concavo-convex portions that form concavo-convex portions 35 on the surface of the sheath 19a of the cable 19 extruded in the extrusion molding step P2. And a process P3.

  The cable 19 manufactured in this way has a diameter of, for example, 200 mm, and the surface structure thereof has an uneven portion 35 formed on the peripheral surface of the sheath 19a as shown in FIG. It is formed like a satin. The surface roughness of the sheath 19a is set in the range of 0.054 to 2.101 μm. The relationship between the surface roughness Ra, the static friction coefficient, and the dynamic friction coefficient is shown in FIGS. 6 and 7 show the relationship between the friction coefficient and the surface roughness actually measured by spreading the sheath 19a collected from the cable 19 shown in FIG. 1 into a sheet shape.

  Therefore, as shown in FIGS. 6 and 7, it can be understood that the static friction coefficient and the dynamic friction coefficient decrease as the value of the surface roughness Ra increases.

  Here, the “method for testing the coefficient of friction of plastic films and sheets” defined in JIS K7125 will be described with reference to FIG.

  This standard is a method for measuring a coefficient of friction by sliding a test piece 41 on a mating material 43 by measuring a static friction coefficient and a dynamic friction coefficient (hereinafter referred to as a friction coefficient) due to sliding friction of a plastic film and a sheet. It stipulates.

  The test piece 41 used here has a thickness of 0.2 mm or less in principle.

  The meaning of the main terms used in this standard will be explained.

  The frictional force is a static frictional force and a dynamic frictional force at the time of sliding motion when the contact surface is in a sliding state from a stationary state, and the contact force is a force that works perpendicularly to the contact surface between the measurement materials. This is the weight of the test piece 41. The friction coefficient is a ratio between the frictional force and the contact force, and the sliding piece 45 is a weight that gives the contact force.

  The mating material 43 is a material to be rubbed against the test piece 41 and is a material attached to the test table 47. In principle, the condition of the test piece 41 is adjusted to JIS K7100 (standard adjustment of plastic condition and test place before testing). State) standard temperature state grade 2 and standard humidity state grade 2 (temperature 23 ± 2 ° C. and relative humidity 50 ± 5%) for at least 88 hours.

  As a general rule, the test temperature and humidity are the same as the above-mentioned conditions, ie, standard temperature state class 2 and standard humidity condition class 2 (temperature 23 ± 2 ° C. and relative humidity 50 ± 5%).

  Next, a test machine and a measuring instrument will be described.

  The tester is based on the annex plastic film and sheet friction coefficient tester.

  The dimension measuring instrument is for measuring the thickness of the film and sheet, the size of the sliding piece, JIS B7503 (0.01 mm scale dial gauge), JIS B7509 (0.001 mm scale dial gauge), JIS B7507 ( Calipers), etc., or having an accuracy equal to or better than this.

  The stopwatch is used to measure the sliding speed of the sliding piece 45, and the scale is used to measure the mass of the sliding piece 45, and has an accuracy of one scale of 20 mg specified in JIS B7601 (top balance). Or having an accuracy equivalent to or better than this.

  Next, the test piece 41 and the counterpart material 43 will be described.

  The shape and dimensions of the test piece 41 are a rectangle having a width of 80 mm and a length of 200 mm.

  The shape and size of the mating material 43 are a rectangular shape having a width of 80 mm and a length of 200 mm or more. The mating material 43 is a plastic film (or sheet) or other hard material. May be plastic, metal, rubber, etc.

  The number of test pieces 41 is three or more. In principle, the number of mating materials 43 is three or more, and even if the friction surface is several times of friction, if there is no influence on the subsequent test, it may be one by agreement between the parties.

  By the way, the test piece 41 is produced as follows.

  First, in a press machine, two iron plates are sandwiched between an iron plate, a sandpaper, a plastic sheet, a sandpaper, and an iron plate.

  And by pressing, the uneven | corrugated | grooved part is formed with the sandpaper in the plastic sheet pinched | interposed as shown in FIG. Thus, the uneven part formed in the plastic sheet is the same as the uneven part 35 formed in the surrounding surface of the sheath 19a by the said embodiment.

  In addition, the particle size of the protrusions of the sandpaper corresponding to the surface roughness Ra = 0.054 to 2.101 μm of the uneven portion 35 as in the above-described embodiment is the measured value, no protrusions, 1 to 7, It is 8-12, 13-17, 18-22, 23-27, 28-34 micrometers.

  The shape and size of the sliding piece 45 is a square having a side of 63 mm, and a felt 49 having a thickness of 2 mm is smoothly adhered to the contact surface with R36W defined in JIS L3201 (wool long felt). . When it is recognized that the test result is not affected, a metal hook having a diameter of 1 mm may be attached to the center of the thickness surface of the sliding piece 45. In FIG. 8, an auxiliary plate (not shown) is attached to one end of the test piece 41, and this auxiliary plate is connected to the load cell 53 via the connection tool 51. 55 is a pulley.

  Next, the operation will be described.

  (1) Fix the mating material 43 to the test table 47 so that the friction surface of the mating material 43 is up, and there is no stretching, bending, or wrinkling.

  (2) Affix to an auxiliary plate (not shown) on one end of the test piece 41 and set on the mating material 43 so as not to be stretched, bent or wrinkled.

  (3) Measure the mass of the sliding piece 45 and confirm that it is 200 ± 2 g.

  (4) When measuring the dynamic friction coefficient, a spring having a spring constant of 2 ± 1 N / cm {200 ± 100 fg / cm} is set between the load cell 53 and the auxiliary plate. When measuring the dynamic friction coefficient, the spring is removed and the load cell 53 and the auxiliary plate are directly connected.

  (5) Set the sliding piece 45 gently and in parallel. After 15 seconds, start the test at a test speed of 100 ± 10 mm per minute.

  As a remark, when the sliding piece 45 of 200 g extends to the test piece 41 and bends, wrinkles, etc., the test may be performed using other than 200 g. In this case, the used load is used for the calculation.

(6) When measuring the static friction coefficient, the initial maximum load is the static friction force (Fj). When measuring the dynamic friction coefficient, the average load from the point at which the initial maximum load is exceeded to the minimum to the friction distance of 70 mm is _defined as the dynamic friction force (F _k ).

  As a remark, when the test is performed using the metal hook of the sliding piece 45, the test piece 41 may be stretched, attached to the sliding piece 45 so as not to bend or wrinkle, and the same operation may be performed. .

  Next, the definition of the surface roughness will be described with reference to FIGS.

また、最大高さ（Ｒｙ）は、図１１に示す粗さ曲線から、その平均線の方向に基準長さＬだけ抜き取り、この抜き取り部分の山頂線と谷底線との間隔を粗さ曲線の縦倍率の方向に測定した値をいう。 The arithmetic average roughness (Ra) is extracted from the roughness curve shown in FIG. 10 by the reference length L in the direction of the average line, the X axis in the direction of the extracted portion, and the Y axis in the direction of the vertical magnification. When expressed by f (x), it means a value obtained by the following equation.

Further, the maximum height (Ry) is extracted from the roughness curve shown in FIG. 11 by the reference length L in the direction of the average line, and the interval between the peak line and the valley bottom line of this extracted part is set to the vertical direction of the roughness curve. A value measured in the direction of magnification.

ここで、Ｙ_p1、Ｙ_p2、Ｙ_p3、Ｙ_p4、Ｙ_p5は、基準長さＬに対応する抜取り部分の、最も高い山頂から５番目までの山頂の標高であり、Ｙ_v1、Ｙ_v2、Ｙ_v3、Ｙ_v4、Ｙ_v5は、基準長さＬに対応する抜取り部分の、最も低い谷底から５番目までの谷底の標高である。 Further, the ten-point average roughness (Rz) is the highest peak measured from the roughness curve shown in FIG. 12 by the reference length in the direction of the average line and measured in the direction of the vertical magnification from the average value of the extracted portion. Is the average of the absolute values of the altitude (Yp) of the top of the mountain from the fifth to the fifth, and the absolute value of the altitude (Yv) of the bottom of the bottom from the lowest valley to the fifth.

Here, Y _p1 , Y _p2 , Y _p3 , Y _p4 , Y _p5 are the altitudes of the top of the sampling portion corresponding to the reference length L from the highest summit to the fifth summit, Y _v1 , Y _v2 , Y _v3 , Y _v4 , and Y _v5 are the elevations of the bottom from the lowest valley bottom to the fifth in the sampling portion corresponding to the reference length L.

  In this way, in this embodiment, the wire tension in a simple straight line is the friction coefficient, its own weight, and the tension, T = μWL (T: wire tension (kfg), μ: friction coefficient, W: cable's own weight ( kg / m), L: wire length (m)). In general construction, wire tension ≦ 150 kgf is a standard.

  Thus, the measurement of the friction coefficient is based on JIS K7125 (see FIG. 8), and the surface roughness is based on JIS B0651 (see FIGS. 10 to 12), and the surface roughness Ra is increased from the result. It can be seen that the friction can be reduced. Therefore, in the present embodiment, by forming irregularities on the surface of the sheath 19a at the time of extrusion or after extrusion, it is possible to reduce the contact area with the surrounding wall or cable and reduce the friction characteristics. As a result, by reducing the friction coefficient, it is possible to reduce the wire tension and thus extend the wire length.

  From this, according to the surface structure of the cable 19 in the present embodiment, the uneven portion 35 is formed on the surface of the sheath 19a of the cable 19, so that the strength of the cable 19 itself does not decrease, and the cable 19 By reducing the contact area and reducing the frictional characteristics and the wire tension, the cable 19 can be laid easily and the wire distance can be increased.

  Moreover, according to the surface structure of the cable 19 in the present embodiment, since the uneven portion 35 is formed in a satin shape on the peripheral surface of the sheath 19a of the cable 19, the uneven portion 35 can be easily formed.

  Furthermore, according to the surface structure of the cable 19 in the present embodiment, the static friction coefficient and the dynamic friction coefficient can be reduced because the surface roughness of the sheath 19a of the cable 19 is in the range of 0.054 to 2.101 μm. It becomes possible.

  According to the manufacturing apparatus of the cable 19 in the present embodiment, the cable 19 is extruded by the extrusion molding apparatus 1, the cable 19 extruded from the extrusion molding apparatus 1 is immersed in the cooling water 7 of the cooling water tank 9, and the extrusion is performed. By forming the concavo-convex portion 35 by the surface processing device 5 on the surface of the sheath 19a of the cable 19 extruded from the molding device 1, a cable with reduced contact area and reduced friction characteristics and wire tension can be surely and easily obtained. Can be manufactured.

  And since the surface processing apparatus 5 was arrange | positioned in the water of the water surface vicinity of the cooling water tank 9, when forming the uneven | corrugated | grooved part 35 on the surface of the sheath 19a of the cable 19, the surface temperature of the sheath 19a of the cable 19 is made into desirable processing temperature. Can be. Further, the surface processing apparatus 5 is formed in a cylindrical shape, and a plurality of processing rotating bodies 27 that are rotatable with respect to each other are arranged in an annular shape, whereby the sheath 19a of the cable 19 is inserted into the annular surface processing apparatus 5. Thus, since the uneven portion 35 is formed on the surface of the sheath 19a of the cable 19 by the plurality of processing rotating bodies 27, the uneven portion 35 can be processed reliably and smoothly.

  Moreover, according to the manufacturing apparatus of the cable 19 in the present embodiment, the plurality of processing rotating bodies 27 can easily form the uneven portion 35 by forming the satin-like uneven portion 35 on the peripheral surface. it can. And since the uneven | corrugated | grooved part 35 with the surface roughness each in the range of 0.054-2.101 micrometers was formed in the some process rotary body 27, the uneven | corrugated | grooved part 35 which reduced the static friction coefficient and the dynamic friction coefficient is formed. Can do.

  According to the manufacturing method of the cable 19 in the present embodiment, the extrusion process P1 for extruding the cable 19 and the cable 19 extruded in the extrusion process P1 are cooled to a predetermined temperature by the cooling device 3, In addition, since it includes a cooling step P2 for cooling by immersing in the cooling water 7, and an uneven portion forming step P3 for forming the uneven portion 35 on the surface of the sheath 19a of the cable 19 extruded in the extrusion molding step P1. The cable 19 with reduced contact area and reduced frictional characteristics and wire tension can be reliably and easily manufactured.

  The present invention is not limited to the above-described embodiment, and various modifications can be made. For example, in the above embodiment, the textured uneven portion 31 is formed on the peripheral surface of the processing rotator 27 of the surface processing apparatus 5, but not limited to this, as shown in FIG. A corrugated uneven portion 31a may be formed in the entire length direction.

  Therefore, since the plurality of processing rotating bodies 27a are each formed with the corrugated uneven portion 31a in the circumferential direction in the entire length direction, the unevenness portion 31a can distribute the force when the cable 19 is laid and improve the lateral pressure characteristics. be able to.

It is a block diagram which shows the manufacturing apparatus of the cable in one embodiment of this invention. It is a top view which shows the surface processing apparatus in the manufacturing apparatus of FIG. It is a perspective view which shows each process rotary body of the surface processing apparatus of FIG. It is process drawing which shows the manufacturing method of the cable in one embodiment of this invention. It is a perspective view which shows a part of cable manufactured with the manufacturing apparatus of FIG. It is explanatory drawing which shows the relationship between the surface roughness by this Embodiment, a static friction coefficient, and a dynamic friction coefficient. It is a graph which shows the relationship between the surface roughness by this Embodiment, a static friction coefficient, and a dynamic friction coefficient. It is explanatory drawing which shows the friction coefficient test method of a plastic film and a sheet | seat. It is explanatory drawing which shows the state before and after formation of the uneven | corrugated | grooved part by sandpaper. It is explanatory drawing which shows the arithmetic mean roughness of surface roughness. It is explanatory drawing which shows the maximum height of surface roughness. It is explanatory drawing which shows the 10-point average roughness of surface roughness. It is a perspective view which shows the modification of the uneven | corrugated | grooved part in the process rotary body of FIG.

Explanation of symbols

1 Extruder 3 Cooling device (cooling means)
5 Surface processing equipment 7 Cooling water (cooling means)
9 Cooling Water Tank 11 Die Body 13 Die 15 Heater 17 Crosshead Die 19 Cable 19a Sheath 21 Mandrel 23 Tension Member 25 Air Inlet 27 Processing Rotator 29 Insertion Hole 31 Concave and Concavity 33 Roller 35 Concave and Concavity 41 Test Piece 43 Counterpart Material 45 Slip Piece 47 Test table 49 Felt 51 Connector 53 Load cell 55 Pulley

Claims (11)

  A surface structure of a cable, characterized in that an uneven portion is formed on the surface of the cable sheath.   2. The surface structure of a cable according to claim 1, wherein the concavo-convex portion is formed in a waveform in the circumferential direction of the cable sheath and is formed in the entire length direction.   The surface structure of the cable according to claim 1, wherein the concavo-convex portion is formed in a satin shape on the peripheral surface of the cable sheath.   The surface structure of the cable according to any one of claims 1 to 3, wherein a surface roughness of the cable sheath is in a range of 0.054 to 2.101 µm. An extrusion apparatus for extruding a cable;
Cooling means for cooling the cable extruded from the extrusion molding device;
A surface processing device for forming irregularities on the surface of the sheath of the cable extruded from the extrusion molding device;
An apparatus for manufacturing a cable, comprising:   The cable manufacturing apparatus according to claim 5, wherein the surface processing apparatus is disposed in water near a water surface of a cooling water tank in which cooling water constituting the cooling means is accommodated.   6. The cable manufacturing apparatus according to claim 5, wherein the surface processing apparatus is formed in a cylindrical shape and a plurality of processing rotating bodies that are rotatable with respect to each other are arranged in an annular shape.   The cable manufacturing apparatus according to claim 7, wherein each of the plurality of processing rotators has a corrugated uneven portion formed in a circumferential direction in the entire length direction.   The cable manufacturing apparatus according to claim 7, wherein each of the plurality of processing rotating bodies has a satin-like uneven portion formed on a peripheral surface thereof.   The cable manufacturing method according to any one of claims 7 to 9, wherein the plurality of processed rotating bodies each have an uneven portion having a surface roughness in a range of 0.054 to 2.101 µm. apparatus. An extrusion process for extruding the cable;
A cooling step for cooling the cable extruded in the extrusion molding step;
An uneven part forming step for forming an uneven part on the surface of the sheath of the cable extruded in the extrusion process,
A method for manufacturing a cable, comprising:

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