Cable manufacturing device and cable manufacturing method

Abstract

To provide a cable manufacturing device capable of manufacturing a cable by aligning a die and a nipple without using a special jig.SOLUTION: A cable manufacturing device comprises a die and a nipple to be inserted into the die. The die includes: a first hole having an outlet side opening with a shape other than a circle through which an elongated member on which a resin layer is disposed passes; and a first engagement portion. The nipple includes: a second hole, the opening of which on a die side is smaller in shape than the first hole and has a similar shape to the first hole, and through which the elongated member passes; and a second engagement portion. The first engagement portion and the second engagement portion are engaged with each other, and therefore a circumferential position of the second hole relative to the first hole is defined when viewed along a movement direction of the elongated member.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a cable manufacturing apparatus and a cable manufacturing method. [Background technology]

[0002] In power transmission or communication cables, a resin is coated around a long member (such as an electric wire or an optical fiber core), and the long member is insulated or protected by the resin jacket. When coating the long member with resin, the long member guided by a nipple is passed through the opening of a die hole, and extrusion molding is performed to coat the long member with resin while pushing the resin filled in the die out of the die hole (see, for example, Patent Document 1). The opening of the nipple hole has the same shape as the cross-sectional shape of the long member, and the opening of the die hole has the same shape as the cross-sectional shape of the cable.

[0003] Patent Document 1 describes an extruder having a nipple with a non-circular hole opening and a die with a non-circular hole opening. A jig is used to assemble the nipple and die in the extruder of Patent Document 1. Specifically, the jig is placed on the nipple and die with the center of the hole opening of the nipple and the center of the hole opening of the die aligned on the same line and the nipple and the die aligned in the circumferential direction. In this state, the nipple is fixed to the die, and an extruder in which a resin supply path is formed between the nipple and the die can be assembled.

[0004] In this extruder, molten resin supplied through a resin supply passage is extruded through a die hole together with the long member guided to the nipple, forming a resin layer on the surface of the long member that conforms to the shape of the die hole. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2015-156286 A Summary of the Invention [Problem to be solved by the invention]

[0006] The extruder described in Patent Document 1 has a problem in that the nipple and the die need to be positioned using jigs, making the assembly work complicated.

[0007] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to provide a cable manufacturing apparatus and a cable manufacturing method that are capable of manufacturing a cable by aligning nipples and dies without using a special jig. [Means for solving the problem]

[0008] In order to solve the above problem, according to one aspect of the present invention, An apparatus for manufacturing a cable having a long member and a resin layer disposed on a surface of the long member, Dice and a nipple inserted into the die; The die is a first hole having an outlet side opening having a shape other than a circle through which the elongated member having the resin layer disposed thereon passes; A first engagement portion, The nipple is a second hole, the opening of which is on the die side and through which the elongated member passes, the second hole having a shape smaller than that of the first hole and similar to that of the first hole; A second engagement portion, When the first engagement portion and the second engagement portion are engaged with each other, a circumferential position of the second hole relative to the first hole is defined when viewed along the movement direction of the elongated member. An apparatus for manufacturing a cable is provided.

[0009] In order to solve the above problem, according to one aspect of the present invention, A method for manufacturing a cable having a long member and a resin layer disposed on a surface of the long member, comprising the steps of: disposing the resin layer on a surface of the elongated member using the manufacturing apparatus of the present invention; having A method for manufacturing a cable is provided. Effect of the Invention

[0010] According to the present invention, the nipple and the die can be aligned to manufacture the cable without using a special jig. [Brief description of the drawings]

[0011] [Figure 1] 1A and 1B are diagrams showing a configuration of a part of a head of a cable manufacturing apparatus according to one embodiment of the present invention. [Diagram 2] 2A and 2B are cross-sectional views of the nipple and die. [Diagram 3] 3A to 3C are diagrams showing the configuration of a die. [Figure 4] 4A to 4C are diagrams showing the configuration of the nipple. [Diagram 5] 5A to 5C are diagrams illustrating a method for producing a cable. [Figure 6] FIG. 6 is a flow chart of a method for manufacturing a cable. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a cable manufacturing apparatus and a cable manufacturing method according to an embodiment of the present invention will be described with reference to the accompanying drawings.

[0013] [Cable configuration] First, the cable 100 to be manufactured will be described. The cable 100 has a long member 101 and a resin layer 102 (see FIG. 1B). The cross-sectional shape of the long member 101 in a direction perpendicular to the length direction (movement direction) is not particularly limited as long as it is a shape other than a circle. The cross-sectional shape of the long member 101 in a direction perpendicular to the length direction may be a polygon or other shape. In this embodiment, the cross-sectional shape of the long member 101 in a direction perpendicular to the length direction is a rectangle. In addition, the material of the long member 101 can be appropriately selected from known materials depending on the application. The long member 101 may be a conductor or may not be a conductor. In this embodiment, the long member 101 is a conductor. The resin layer 102 is disposed on the surface of the long member 101. In this embodiment, the resin layer 102 is disposed on the surface of the long member 101 so as to have the same thickness. That is, in this embodiment, the cross-sectional shape of the cable 100 in a direction perpendicular to the axis is a rectangle (rectangle). The material of the resin layer 102 can be appropriately selected from known materials depending on the application. In this embodiment, the material of the resin layer 102 is an insulating resin.

[0014] [Cable manufacturing equipment] Fig. 1A is a front view of a portion of a head (crosshead) of an apparatus (extruder) 10 for manufacturing a cable 100, and Fig. 1B is a side view. Fig. 2A is a cross-sectional view taken along line AA in Fig. 1A, and Fig. 2B is a cross-sectional view taken along line BB in Fig. 1A. The arrow in Fig. 1B indicates the movement direction of the elongated member 101 (cable 100). In the following description, the upstream side in the movement direction of the elongated member 101 (cable 100) is referred to as the "base end" and the downstream side as the "tip end".

[0015] As shown in FIGS. 1A and 1B and 2A and 2B, the cable 100 manufacturing apparatus 10 has a die 20 and a nipple 30. In addition to the above configuration, the cable 100 manufacturing apparatus 10 may have a nipple holder 40 for pressing the nipple 30 against the die 20 and a guide section 50 for guiding the long member 101. Although not shown, the cable 100 manufacturing apparatus 10 may have a cylinder (screw) for supplying resin toward the resin supply path 55. The cable 100 manufacturing apparatus 10 of this embodiment is used in a state in which the nipple 30 is engaged with the die 20. Although not shown, the nipple 30 and the die 20 are configured to be heatable by a heat source in the manufacturing apparatus 10.

[0016] 3A is a front view of the die 20, FIG. 3B is a cross-sectional view taken along line AA shown in FIG. 3A, and FIG. 3C is a cross-sectional view taken along line BB shown in FIG. 3A.

[0017] The die 20 has a nipple 30 disposed therein. As shown in Figures 3A and 3B, the die 20 has a first hole 21, a first recess 22, and a first engagement portion 23.

[0018] First hole 21 is disposed at the tip of die 20, and allows cable 100 (long member 101 and resin layer 102) to pass through. The shape of the opening on the exit side of first hole 21 is the same as the cross-sectional shape of cable 100 in a direction perpendicular to the moving direction. In this embodiment, the shape of the opening on the exit side of first hole 21 is a horizontally long rectangle when die 20 is viewed from the front (see FIG. 3A).

[0019] The first recess 22 opens at the base end of the die 20. The shape of the first recess 22 is substantially complementary to a part of the nipple 30. In this embodiment, with the nipple 30 disposed in the first recess 22, a resin supply path 55 (see FIGS. 2A and 2B) is formed between the die 20 and the nipple 30. In this embodiment, the first recess 22 has a first tapered portion 25, a straight portion 26, and a second tapered portion 27. The base end of the first tapered portion 25 opens to the outside, and the straight portion 26 is connected to the tip of the first tapered portion 25. The first tapered portion 25 is connected to the base end of the straight portion 26, and the second tapered portion 27 is connected to the tip of the straight portion 26, and a resin supply port 56 is formed on the inner surface of the straight portion 26. The straight portion 26 is connected to the base end of the second tapered portion 27, and the first hole 21 is disposed at the tip of the second tapered portion 27.

[0020] Two first engagement portions 23 are disposed in the first tapered portion 25 and the straight portion 26. The first tapered portion 25 and the second tapered portion 27 are formed so that their cross-sectional areas become smaller from the base end to the tip end. The resin supply port 56 opens to the inner surface of the first recess 22, and supplies the resin supplied from the cylinder to the resin supply path 55. The resin supply port 56 is configured so that a resin supply pipe 57 and a cylinder (not shown) can be connected to it.

[0021] The first engagement portion 23 engages with the second engagement portion 33 of the nipple 30 to determine the circumferential position of the nipple 30 (second hole 31) relative to the die 20 (first hole 21) when viewed along the moving direction of the elongated member 101 (cable 100). The shape of the first engagement portion 23 is not particularly limited as long as it can perform the above function. The shape of the first engagement portion 23 may be a convex portion or a concave portion. In this embodiment, the shape of the first engagement portion 23 is a concave portion (groove). The number of the first engagement portions 23 is not particularly limited. The number of the first engagement portions 23 may be one or more. In this embodiment, the number of the first engagement portions 23 is two. In addition, when there are multiple first engagement portions 23, it is preferable that the multiple first engagement portions 23 are arranged so as to be equally spaced in the circumferential direction when viewed along the moving direction of the elongated member 101. The position of the first engagement portion 23 is also not particularly limited as long as it can perform the above function. For example, the first engagement portion 23 is disposed on the inner surface of the die 20. When viewed along the moving direction of the elongated member 101, the first engagement portion 23 may be disposed at a position corresponding to the long side of the rectangular opening of the first hole 21 (upper or lower side of the first hole 21 in FIG. 3A) or at a position corresponding to the short side (right or left side of the first hole 21 in FIG. 3A). In this embodiment, the two first engagement portions 23 are disposed on the inner surface of the die 20 at positions corresponding to the long side of the opening of the first hole 21, respectively.

[0022] 4A is a front view of nipple 30, FIG. 4B is a cross-sectional view taken along line AA shown in FIG. 4A, and FIG. 4C is a cross-sectional view taken along line BB shown in FIG. 4A.

[0023] 4A to 4C, the nipple 30 is formed in a cylindrical shape, and at least a portion thereof (the tip) is disposed inside the first recess 22 of the die 20. The nipple 30 has a second hole 31, a second recess 32, and a second engagement portion 33.

[0024] The second hole 31 is disposed at the tip of the nipple 30 and allows the elongated member 101 to pass through. The shape of the opening on the outlet side (die 20 side) of the second hole 31 is the same as the cross-sectional shape in a direction perpendicular to the moving direction of the elongated member 101. The second hole 31 is smaller than the first hole 21 and has a similar shape to the first hole. That is, in this embodiment, the shape of the opening on the outlet side of the second hole 31 is a horizontally long rectangle when the nipple 30 is viewed from the front (see FIG. 4A).

[0025] The second recess 32 opens at the base end of the nipple 30. The shape of the second recess 32 is approximately complementary to the shape of the elongated member 101. The base end of the second recess 32 opens to the outside, and a second hole 31 is disposed at the tip.

[0026] The second engagement portion 33 engages with the first engagement portion 23 of the die 20 to determine the circumferential position of the nipple 30 (second hole 31) relative to the die 20 (first hole 21) when viewed along the moving direction of the elongated member 101. The shape of the second engagement portion 33 is not particularly limited as long as it can perform the above function. The shape of the second engagement portion 33 may be a convex portion or a concave portion. In this embodiment, the cross-sectional shape of the second engagement portion 33 in a direction perpendicular to the moving direction of the elongated member 101 is a shape complementary to the first engagement portion 23. In this embodiment, since the first engagement portion 23 is a concave portion, the shape of the second engagement portion 33 is a convex portion. The number of the second engagement portions 33 is not particularly limited. The number of the second engagement portions 33 may be one or more. In this embodiment, the number of the second engagement portions 33 is two. In addition, when there are a plurality of second engagement parts 33, the plurality of second engagement parts 33 are preferably arranged so as to be equally spaced in the circumferential direction when viewed along the moving direction of the elongated member 101. The position of the second engagement parts 33 is not particularly limited as long as it can perform the above-mentioned function. For example, the second engagement parts 33 are arranged on the outer surface of the nipple 30. When viewed along the moving direction of the elongated member 101, the second engagement parts 33 may be arranged at a position corresponding to the long side of the rectangular opening of the second hole 31 (upper or lower side of the second hole 31 in FIG. 4A) or at a position corresponding to the short side (right or left side of the second hole 31 in FIG. 4A). In this embodiment, the two first engagement parts 23 are respectively arranged at positions corresponding to the long side of the first hole 21 on the inner surface of the die 20, and therefore the two second engagement parts 33 are respectively arranged at positions corresponding to the long side of the second hole 31 on the outer surface of the nipple 30.

[0027] The nipple holder 40 presses the nipple 30 against the die 20 to fix the position of the nipple 30 relative to the die 20. The configuration of the nipple holder 40 is not particularly limited as long as it can perform the above-mentioned functions. In this embodiment, the nipple 30 is fixed to the die 20 by pressing the base end side of the nipple 30. The nipple holder 40 also becomes part of the wall of the resin supply path 55. The guide portion 50 is disposed at the base end of the nipple 30, and guides the insertion of the elongated member 101 into the second recess 32.

[0028] When assembling the manufacturing device 10 for the cable 100, first, the nipple 30 is placed on the die 20. At this time, by engaging the first engaging portion 23 with the second engaging portion 33, the centers of the first hole 21 and the second hole 31 can be aligned, and the long side of the opening of the first hole 21 and the long side of the opening of the second hole 31 can be arranged parallel to each other. That is, the circumferential position of the second hole 31 relative to the first hole 21 when viewed along the moving direction of the elongated member 101 is defined. In this state, the nipple 30 is fixed by the nipple holder 40. In addition, the guide portion 50 is placed on the nipple 30, and a resin supply pipe 57 and a cylinder (not shown) are connected to the resin supply port 56.

[0029] [Cable manufacturing method] 5A to 5C are diagrams illustrating a method for manufacturing the cable 100. Fig. 6 is a flowchart of the method for manufacturing the cable 100.

[0030] As shown in FIGS. 5A to 5C and 6, the method for manufacturing cable 100 includes a step (S110) of preparing long member 101, and a step (S120) of arranging resin layer 102.

[0031] In the step (S110) of preparing the long member 101, there is prepared any long member 101. The long member 101 may be one produced by any known method or a commercially available product.

[0032] In the step (S120) of disposing the resin layer 102, the above-mentioned manufacturing apparatus 10 is used to dispose the resin layer 102 on the surface of the elongated member 101. Specifically, as shown in Fig. 5A, after the nipple 30 is disposed on the die 20, the nipple holder 40 and the guide part 50 are disposed. In addition, a resin supply pipe 57 and a cylinder (not shown) are connected to the resin supply port 56.

[0033] 5B, resin is filled into resin supply path 55 from resin supply pipe 57, and elongated member 101 is inserted into second hole 31 and first hole 21. Next, as shown in Fig. 5C, resin is coated inside first hole 21 of die 20 while moving elongated member 101. This allows resin layer 102 to be disposed on the surface of elongated member 101.

[0034] (effect) According to the manufacturing apparatus and method for cable 100 of the present embodiment, it is possible to align die 20 and nipple 30 and manufacture cable 100 without using a special jig. Note that the manufacturing object according to the present embodiment can be changed from cable 100 to a bus bar. [Industrial Applicability]

[0035] The cable 100 manufacturing apparatus and cable 100 manufacturing method of the present invention are extremely useful for manufacturing, for example, electric wires, various cables, and bus bars. [Explanation of symbols]

[0036] 10 Manufacturing equipment 20 Dice 21 Hole 1 22 First recess 23 First engagement portion 25 First taper section 26 Straight section 27 Second taper section 30 Nipples 31 2nd hole 32 Second recess 33 Second engagement portion 40 Nipple holder 50 Guide section 55 Resin supply path 56 Resin supply port 57 Resin supply pipe 100 Cable (busbar) 101 Long members 102 Resin layer

Claims

1. An apparatus for manufacturing a cable having a long member and a resin layer disposed on a surface of the long member, Dice and a nipple inserted into the die; The die is a first hole having an outlet side opening having a shape other than a circle, through which the elongated member having the resin layer disposed thereon passes; A first engagement portion, The nipple is a second hole, the opening of which is on the die side and through which the elongated member passes, the second hole having a shape smaller than that of the first hole and similar to that of the first hole; A second engagement portion, When the first engaging portion and the second engaging portion are engaged with each other, a circumferential position of the second hole relative to the first hole is defined when viewed along the movement direction of the elongated member. Cable manufacturing equipment.

2. an opening on the outlet side of the first hole and an opening on the die side of the second hole are both rectangular; the first engagement portion is disposed on an inner surface of the die at a position corresponding to a long side of the opening of the first hole when viewed along the moving direction, the second engagement portion is disposed on an outer surface of the nipple at a position corresponding to a long side of the opening of the second hole when viewed along the movement direction, When the first engagement portion and the second engagement portion are engaged with each other, a long side of the opening of the first hole and a long side of the opening of the second hole are parallel to each other.

2. An apparatus for manufacturing a cable according to claim 1.

3. The first engagement portion is a recess or a protrusion, The second engagement portion is a convex portion or a concave portion that can be engaged with the first engagement portion.

2. An apparatus for manufacturing a cable according to claim 1.

4. A method for manufacturing a cable having a long member and a resin layer disposed on a surface of the long member, comprising the steps of: A step of disposing the resin layer on a surface of the long member using the manufacturing apparatus according to any one of claims 1 to 3; A method for manufacturing a cable comprising the steps of:

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