KR820002145B1 - Method making of insulator for coaxial cable - Google Patents

Method making of insulator for coaxial cable Download PDF

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Publication number
KR820002145B1
KR820002145B1 KR7900711A KR790000711A KR820002145B1 KR 820002145 B1 KR820002145 B1 KR 820002145B1 KR 7900711 A KR7900711 A KR 7900711A KR 790000711 A KR790000711 A KR 790000711A KR 820002145 B1 KR820002145 B1 KR 820002145B1
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South Korea
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inner conductor
spiral rib
coaxial cable
spiral
insulator
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KR7900711A
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Korean (ko)
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야스노리 사이또오
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다부찌 노보루
스미도모덴기 고오교오 가부시기 가이샤
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B11/00—Communication cables or conductors
    • H01B11/18—Coaxial cables; Analogous cables having more than one inner conductor within a common outer conductor

Abstract

An extrusion process is described for the prodn. of insulator of coaxial cable in which the insulating materials, spiral ribs, are extruded as follow (I) insulation resin spouting surface is inclined preliminary for matching the tangential angle of spouting surface with winding direction on spiral rib, (2) 0.3<δD/δ<0.5 (δd=width of slit-center part; δ=the width of spiral rib; 2R2=outer diam. of rotation nozzle; 2R1=inner conduct diam.), (3) the curvature of continuous curve in cable width can be exhibited as formulal.

Description

동축 케이블 절연체의 제조방법Manufacturing method of coaxial cable insulator

제1도는 종래의 제조장치 실시예를 표시한 도면.1 shows a conventional manufacturing apparatus embodiment.

제2도는 본 발명에 의한 회전 노즐의 실시예를 표시한 도면.2 is a view showing an embodiment of a rotating nozzle according to the present invention.

제3도는 본 발명에 의한 회전 노즐의 절연 수지 토출면에 설치되는 토출공의 형상을 표시한 도면.3 is a view showing the shape of the discharge hole provided in the insulating resin discharge surface of the rotating nozzle according to the present invention.

본 발명은 중공부를 가지는 동축 케이블에 있어 내부 도체의 외주에 나선상으로 감겨져 외부 도체와의 사이에 개재하여 절연체를 구성하는 단면 형상 장방형의 나선상 리브(rib)를 압출 성형하는 동축 케이블 절연체의 제조방법에 관한 것이다.The present invention relates to a method for producing a coaxial cable insulator in which a coaxial cable having a hollow portion is spirally wound around the outer conductor of an inner conductor, and extrudes a cross-sectional rectangular spiral rib that forms an insulator between the outer conductor. It is about.

종래 구조의 절연체는 일반적으로 압출법에 의하여 노즐을 회전시키고 그 노즐의 용융 연화절연 수지토출구(슬릿트)에서 저유전율의 예를들면 폴리에틸렌과 같은 플라스틱 수지를 주행하는 내부 도체의 외주상에 압출하여 단면형상이 장방형의 나선상 비브로서 형성되어 있다.Insulators of the conventional structure are generally rotated by an extrusion method and extruded on the outer circumference of the inner conductor which runs a plastic resin, such as polyethylene, having a low dielectric constant at the melt softening insulating resin outlet (slit) of the nozzle. The cross-sectional shape is formed as a rectangular spiral bead.

상기의 나선상 리브로서 형성되는 동축 케이블 절연체를 상기 압출법에 의하여 제조하는 종래 장치의 1예는 제2도와 같으나 이것을 설명하면, (1)은 내부 도체(2)는 상기 내부 도체의 외주에 형성된 나선상 리브, (3)은 상기 나선상 리브의 외주에 압출된 파이프이며, 나선상 리브(2)와 파이프(3)는 도시하지 않은 압출기에 의하여 용융연화 절연수지가 각각 회전노즐(4) 내의 재료통과공 또는 다이본체(5)와 슬리브(6)으로 형성된 재료통과공에서 내부도체의 외주상에 압출되어 싸이딩(siding) 다이(7) 내에서 나선상 리브(2)와 파이프(3)이일체화 형성된다. 상기 회전노즐(4)는 회전다이(8)의 선단에 배치되고, 회전다이의 후부의 도시하지 않은 회전구동장치에 의하여 일정속도로 내부도체 축심의 주위에 회전한다.One example of a conventional apparatus for manufacturing a coaxial cable insulator formed as the helical rib by the extrusion method is the same as in Fig. 2, but this will be explained. (1) The inner conductor 2 is formed in the spiral of the outer circumference of the inner conductor. The ribs (3) are pipes extruded on the outer circumference of the spiral ribs, and the spiral ribs (2) and the pipes (3) are formed by the extruder (not shown) in which the melt softened insulating resin passes through the material passing hole in the rotary nozzle (4) In the material passing hole formed by the die body 5 and the sleeve 6, the spiral rib 2 and the pipe 3 are integrally formed in the siding die 7 by being extruded on the outer circumference of the inner conductor. The rotary nozzle 4 is disposed at the tip of the rotary die 8, and rotates around the inner conductor shaft center at a constant speed by a rotary driving device (not shown) at the rear of the rotary die.

따라서 나선상 리브의 내부도체에의 권부(卷付) 피치는 상기 회전노즐(4)의 회전속도와 내부도체(1)의 주행속도의 비로 정해진다.Therefore, the pitch of the winding of the spiral rib to the inner conductor is determined by the ratio of the rotational speed of the rotary nozzle 4 and the traveling speed of the inner conductor 1.

또 파이프(3)를 필요로 하지 않을 때는 나선상 리브(2)만의 압출성형도 가능하다.When the pipe 3 is not required, extrusion of only the spiral rib 2 is also possible.

상기 종래 장치에 있어서는, 상기 회전노즐(4)의 수지 토출공은 내부도체(1)의 축선방향으로 개구하고 있으며, 용융연화 절연수지는 내부도체의 축선과 평행하여 토출되기 때문에, 토출방향과 나선상 리브로서의 권부 방향과의 차이에 의하여 나선상 리브가 내부도체(1)의 반경 방향으로 진입하지 않고 약간 넘어지는 일이 있다. 이 나선상 리브의 넘어짐은 동축 케이블의 전기특성의 압화란 결과를 초래한다.In the above conventional apparatus, the resin discharge hole of the rotary nozzle 4 is opened in the axial direction of the inner conductor 1, and the melt softened insulating resin is discharged in parallel with the axis of the inner conductor, so that the discharge direction and the spiral Due to the difference in the winding direction as the rib, the spiral rib may fall slightly without entering the radial direction of the inner conductor 1. The fall of this spiral rib results in a reduction in the electrical properties of the coaxial cable.

또 회전노즐(4)의 토출공의 개구면 형상을 장방형으로 했을 경우는 토출되어 내부도체(1)의 주위에 나선상 리브로서 형성된 것은 단면형상이 블록렌즈상이 되어, 안정되게 내부도체(1)의 주위에 감아놓을 수가 없으며, 종람 장치에는 기계적, 전기적으로 안정된 동축 케이블 절연체를 얻을 수 없었다.In addition, when the opening face shape of the discharge hole of the rotary nozzle 4 is made into a rectangle, it is discharged and formed as a spiral rib around the inner conductor 1, and the cross-sectional shape becomes a block lens shape, and the inside conductor 1 stably It was not possible to wind it around, and it was not possible to obtain mechanically and electrically stable coaxial cable insulators for the feeding device.

본 발명은 상기한 결점을 해소시킨 동축 케이블 절연체의 제조방법에 관한 것이며, 예시 목적으로 발명에 의한 1실시예를 첨부 도면을 참조하며 상세히 설명한다.The present invention relates to a method for manufacturing a coaxial cable insulator that eliminates the above-mentioned drawbacks, and will be described in detail with reference to the accompanying drawings, an embodiment of the invention for purposes of illustration.

제2도는 본 발명에 의한 장치의 실시예를 나타내는 것으로, (9)는 회전노즐(10)은 절연수지토출면, (11)은 절연수지토출공, (12)는 절연수지통과공을 표시한다. 본 발명에 의한 장치의 상기 토출면(10)은 그 토출면의 법선이 내부도체(13)의 주위에 압출성형되는 나선상 리브(14)의 감기는 방향에 근사하도록 미리 일정 각도만큼 경사시켜 설정된다. 절연수지토출면(10)을 상술한 바와 같이 일정각도만큼 경사시키므로서 그 토출면에 설정된 절연수지토출공(11)에서 토출되는 용융연화 절연수지에는 감을 때 무리한 힘이 가해지지 않고 용이하게 감겨져 나선상 리브(14)로서 성형되어 파이프(15)의 용착 일체화되기 때문에, 종래장치의 경우와 같은 나선상 리브의 넘어짐은 일어나지 않는다. 또한 수지토출면(10)의 경사각은 그 면과 내부도체의 축선을 이루는 각을 θ로 했을 때,2 shows an embodiment of the apparatus according to the present invention, in which 9 denotes a rotating nozzle 10 for insulating resin discharge surface, 11 for insulating resin discharge hole, and 12 for insulating resin through hole. . The discharge surface 10 of the apparatus according to the present invention is set to be inclined by a predetermined angle in advance so that the normal of the discharge surface approximates the winding direction of the spiral rib 14 extruded around the inner conductor 13. . As the insulated resin discharging surface 10 is inclined by a predetermined angle as described above, the wound softening insulating resin discharged from the insulating resin discharging hole 11 set on the discharging surface is easily wound without applying excessive force when wound. Since it is molded as the rib 14 and the welding of the pipe 15 is integrated, the fall of the spiral rib like the conventional apparatus does not occur. In addition, when the angle of inclination of the resin discharging surface 10 is an angle constituting the axis between the surface and the inner conductor, θ,

Figure kpo00001
Figure kpo00001

단 P=나선끈의 권부 피치Winding pitch of sweet P = spiral string

2r10=내부도체의 외경2r 10 = outer diameter of inner conductor

2r20=나선상 비브의 외경2r 20 = outside diameter of spiral bead

이 되는 관계를 만족하도록 θ로 설정했을때 최량의 효과가 얻어졌다. 또 본 발명에 의한 장치의 회전노즐(9)의 절연수지 토출면(10)에 설치되는 절연수지 토출공(11)의 형상은 제3도에 표시하는 것으로 그 중앙폭 δD는 성형후의 나선상 리브의 폭 δ에 대하여 0.3＜

Figure kpo00002
＜0.5인 범위에서 선택되고, 회전노즐의 내부도체 통과공경 및 외경을 각각 2r1, 2r2로 하고, 회전노즐의 중심축을 통하여 상기 토출면내에 있는 선을 Y축 상기 중심축을 통하여 상기 토출면내에 있고, Y축과 직교하는 선을 X축으로 하는 직교 좌표계를 사용하면 상기 토출공의 형상은,The best effect was obtained when it was set at θ so as to satisfy the following relationship. In addition, the shape of the insulating resin discharge hole 11 provided in the insulating resin discharge surface 10 of the rotating nozzle 9 of the apparatus according to the present invention is shown in Fig. 3, and the median width δ D is the spiral rib after molding. 0.3 for the width δ of
Figure kpo00002
Is selected in the range of <0.5, and the inner conductor through hole diameter and outer diameter of the rotating nozzle are 2r 1 and 2r 2 , respectively, and the line in the discharge surface through the central axis of the rotary nozzle is in the discharge surface through the central axis of the Y axis. When a rectangular coordinate system having a line perpendicular to the Y axis as the X axis is used, the shape of the discharge hole is

Figure kpo00003
Figure kpo00003

이와같은 식으로 나타나는 곡선과 회전노즐의 내부도체 통과공정 2r1과 외경 2r2인 두개의 원호로 둘러싸인 형상을 가지고 있다.It has a curved shape and two circular arcs, the inner conductor passing process 2r 1 and the outer diameter 2r 2 of the rotating nozzle.

또한 상기의 형상을 가지는 토출공 및 경사된 토출면을 가지는 회전노즐은 종래 실시예에 표시한 것과 같은 회전 다이의 선단에 부착되어 동축 케이블 절연체의 제조장치를 구성하고 있다.In addition, a rotating nozzle having a discharge hole having the above-described shape and an inclined discharge surface is attached to the tip of the rotating die as shown in the conventional embodiment to constitute an apparatus for manufacturing a coaxial cable insulator.

상기의 절연수지 토출공의 형상은 각가지의 실험을 거쳐 구해진 것인데 상기 실시예의 회전노즐을 사용하여 압출 성형된 나선상 리브에는 단면형상이 균일한 장방형이며, 또한 케이블로서의 전기특성도 양호하였다.The shape of the insulating resin discharge hole was obtained through various experiments, and the spiral rib extruded using the rotary nozzle of the above embodiment had a uniform rectangular shape and good electrical characteristics as a cable.

또한 회전노즐(9)의 내부도체 통과공경 2r1은 내부도체의 외경 2r10보다도 0.2-0.5mm 큰 값으로 선택하면 편심들이 발생하지 않고 내부도체에로 회전노즐에 의한 흠이 생기지 않고 가장 좋은 결과가 얻어지고 있다.In addition, if the inner conductor through hole 2r 1 of the rotating nozzle 9 is selected to be 0.2-0.5mm larger than the outer diameter 2r 10 of the inner conductor, eccentricity does not occur, and the inner nozzle does not have any flaw due to the rotating nozzle. Is being obtained.

이상과 같이 본 발명에 의한 장치를 사용하면 단면형상 장방형의 균일하고, 또한 직입하여 넘어지지 않는 동축 케이블 절연체를 제조하는 것이 가능하며, 그 효과도 크다.By using the apparatus according to the present invention as described above, it is possible to manufacture a coaxial cable insulator that is rectangular in cross-sectional shape and does not directly fall down, and the effect is also great.

Claims (1)

내부도체의 외주에 외부도체와의 사이에 개재하여 절연체를 구성하는 절연재료로 되는 단면형상 장방형의 나선상 리브를 압출성형하는 동축 케이블 절연체의 제조방법에 있어, 나선상 리브를 압출성형하는 회전노즐의 용융연화 절연수지의 토출면을 내부도체의 중심축선에 대하여 상기 토출면에 설치한 토출공(슬릿트)에서 토출되는 용융연화 절연수지의 토출방향이 상기 나선상 리브의 내부 도체에의 성형시킴과 동시에, 토출공의 반경방향 압축연 형상이 그 슬릿트의 반경방향 중앙부 폭을 δD상기 회전노즐의 외경 및 내부도체 통과공경을 각각 2r2및 2r1또는 상기 나선상 리브의 두께를 δ로 한 때, 상기 토출공 중앙부폭δD이 0.3＜δD/δ＜0.5의 범위내에 있고, 직표 좌표계에서In the manufacturing method of the coaxial cable insulator which extrudes the cross-sectional rectangular spiral rib which becomes the insulating material which comprises an insulation material in the outer periphery of an inner conductor between an outer conductor, the melting of the rotary nozzle which extrudes a spiral rib The discharge direction of the molten softened insulating resin discharged from the discharge hole (slit) provided on the discharge surface with respect to the central axis of the inner conductor is molded into the inner conductor of the spiral rib, When the radially compressed edge shape of the discharge hole is the radial center width of the slit δ D, the outer diameter and the inner conductor through hole diameter of the rotating nozzle are 2r 2 and 2r 1 or the thickness of the spiral rib is δ, respectively. The discharge hole central portion width δ D is in the range of 0.3 <δ D /δ<0.5,
Figure kpo00004
Figure kpo00004
 로 나타내어지는 곡율을 가지는 곡선으로 연속적으로 폭을 넓히도록 구성된 것을 특징으로 하는 동축 케이블 절연체의 제조방법.Method for producing a coaxial cable insulator, characterized in that configured to continuously widen in a curve having a curvature represented by.
KR7900711A 1979-03-08 1979-03-08 Method making of insulator for coaxial cable KR820002145B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016006827A1 (en) * 2014-07-10 2016-01-14 주식회사 케미텍 Coaxial cable and apparatus for coating insulator of coaxial cable

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016006827A1 (en) * 2014-07-10 2016-01-14 주식회사 케미텍 Coaxial cable and apparatus for coating insulator of coaxial cable
CN106489184A (en) * 2014-07-10 2017-03-08 凯觅科技股份有限公司 The insulator armoring device of coaxial cable and coaxial cable

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