JP2013143290A - Flat cable extrusion mold and method for manufacturing flat cable - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stabilize a shape of a flat cable.SOLUTION: A flat cable extrusion mold includes an inner mold and an outer mold 50. The inner mold has a core wire guide port 34 opened in the tip end thereof and having a shape in which a plurality of core wire passages 35 through which core wires 12 can be passed are arranged in a row so as to communicate with each other in side portions thereof, and has the tip end having a flat shape along a direction in which the plurality of core wire passages 35 are arranged. The outer mold 50 has in the tip end thereof a discharge port 52 opened in a flat shape along the direction in which the plurality of core wire passages 35 are arranged, and has the tip end flush with the tip end of the core wire guide port 34 or positioned on a front side of the tip end, and arranged so as to be spaced from the outer periphery of the inner mold 30 at an interval allowing an insulation coating material to pass therethrough. The inner mold 30 has concave notches 37 formed from the outer periphery toward the communicating portions between the plurality of core wire passages 35, in at least one of two portions in the direction in which the plurality of core wire passages 35 are arranged, of the outer periphery of the tip end thereof.

Description

  The present invention relates to a technique for manufacturing a flat cable.

  Patent Document 1 discloses a flat cable. Such a flat cable is generally manufactured by extruding an insulating coating material in a form covering the outer peripheral portions of a plurality of core wires arranged in parallel to form a covering portion.

  More specifically, the manufacture of the flat cable has an inner mold that guides a plurality of core wires in parallel through the core wire guide port, a resin discharge port at the tip, and a resin passage on the outer peripheral side of the inner mold. This is performed using a jig having an outer mold disposed with a gap. Then, in a form that covers the outer periphery of the core wire drawn out from the core wire guide port of the inner mold, the molten or soft insulating coating material is discharged from the gap between the inner mold and the outer mold through the resin discharge port.

JP 2011-14449 A

  By the way, the applicant applied higher pressure in the resin discharge port by providing the front end portion of the resin discharge port in front of the front end portion of the core wire guide port in order to smooth the surface of the covering portion of the flat cable. It has been proposed to employ a technique for discharging an insulating coating material in a state.

  On the other hand, depending on the material of the core wire to be coated, the applicant reduces the load on the core wire by providing the front end portion of the resin discharge port in front of the front end portion of the core wire guide port. It is also proposed to employ a technique for reducing the pressure by the insulating coating material on the core wire in the resin discharge port by providing the wire near the tip of the core wire guide port (including the case where it is flush).

  However, if the tip of the resin discharge port is provided in the vicinity of the tip of the core wire guide port, the load on the core wire is reduced, but the insulation coating material does not sufficiently enter the gap between the core wires, and a plurality of core wires are formed in the coating portion. However, there was a risk that the shape of the flat cable itself would collapse due to separation from the parallel state.

  Then, an object of this invention is to stabilize the shape of a flat cable.

  A first aspect is a flat cable extrusion mold for extruding a flat cable formed by covering an outer periphery of a plurality of core wires arranged in a line in parallel with an insulating coating material, A plurality of core wire passages that open in a circular shape and are capable of passing through the core wire along the extending direction have core wire guide ports formed in a line in a form that communicates with each other at the side, and the tip The portion is formed in a flat shape along the direction in which the plurality of core wire passages are arranged, and an inner mold that can guide the plurality of core wires in a line in parallel, and the direction in which the plurality of core wire passages are arranged at the tip portion A resin discharge port that opens in a flat shape along the front end, and the front end portion is flush with or forward of the front end portion of the core wire guide port and the outer peripheral portion of the inner mold is Provided with a gap through which the insulation coating material can pass. An outer mold, and the inner mold is formed on at least one of two portions of the outer peripheral portion of the tip portion extending in the direction in which the plurality of core wire passages are arranged from the outer peripheral portion to the plurality of the outer die. It has a concave cut portion formed toward the communication portion between the core wire passages.

  A 2nd aspect is a flat cable extrusion metal mold | die which concerns on a 1st aspect, Comprising: The said notch part is gradually toward the said communication part of these core wire passages from the outer peripheral part of the said inner metal mold | die. It is formed in a shape that becomes narrow.

  A 3rd aspect is a flat cable extrusion metal mold | die which concerns on a 1st or 2nd aspect, Comprising: The said notch part is the said some core wire passageway in the outer peripheral part of the front-end | tip part of the said inner mold. It is formed in both of the two parts extending in the line-up direction.

  A fourth aspect is a flat cable extrusion mold according to any one of the first to third aspects, and the inner mold and the outer mold are arranged in a form in which the tip portions are flush with each other. It is installed.

  A fifth aspect is a method of manufacturing a flat cable formed by covering the outer peripheral portions of a plurality of core wires arranged in a line in parallel with an insulating coating material, wherein: (a) claims 1-4 In the flat cable extrusion die according to any one of the above, the step of moving the plurality of core wires in parallel in a row through the core wire guide port of the inner die, and (b) the flat cable extrusion die In the mold, the outer covering portions of the plurality of core wires that are moved downstream from the resin discharge port in the step (a) through the gap between the inner mold and the outer mold are covered with the mold. And an extruding step.

  According to the flat cable extrusion mold according to the first aspect, the inner mold formed in a flat shape along the direction in which the plurality of core wire passages are arranged in the front end portion includes a plurality of outer peripheral portions of the front end portion. At least one of the two portions extending in the direction in which the core wire passages are arranged has a concave notch formed from the outer peripheral portion toward the communication portion between the plurality of core wire passages. For this reason, the insulating coating material can be inserted into the gap between the core wires through at least one of the cut portions, and the shape of the flat cable can be stabilized.

  According to the flat cable extrusion die according to the second aspect, the cut portion is formed in a shape that gradually becomes narrower from the outer peripheral portion of the inner die toward the communication portion between the plurality of core wire passages. . For this reason, a cut | notch part can be formed in the shape which reaches nearer with respect to the communication part of a some core wire passage. As a result, the insulating coating material can be inserted deeper into the gaps between the plurality of core wires guided through the core wire guide port, and the shape of the flat cable can be more reliably stabilized.

  According to the flat cable extrusion die according to the third aspect, the cut portions are respectively formed in both of the two portions in the direction in which the plurality of core wire passages are arranged in the outer peripheral portion of the tip portion of the inner die. Yes. For this reason, insulation coating material can be entered from both sides into the gaps between the plurality of core wires, and the shape of the flat cable can be more reliably stabilized.

  According to the flat cable extrusion mold according to the fourth aspect, since the inner mold and the outer mold are arranged in such a manner that the tips are flush with each other, the insulating coating material is pressed against the plurality of core wires. It is possible to reduce the load applied to the plurality of core wires.

  According to the flat cable manufacturing method of the fifth aspect, the flat cable extrusion mold is used to move the plurality of core wires to the downstream side through the core wire guide port of the inner mold, and the insulating coating material is used as the inner mold. It extrudes in the form which covers the outer peripheral part of a some core wire from a resin discharge port through the clearance gap with an outer metal mold | die. Thereby, since the insulation coating material extruded through the notch part of the inner mold in the insulation coating material enters the gaps between the plurality of core wires, a flat cable having a stabilized shape can be manufactured.

It is a perspective view of a flat cable. It is a sectional side view of a flat cable extrusion die. It is a plane sectional view of a flat cable extrusion die. It is a front view of an inner mold. It is a rear view of an outer mold. It is a front view of a core wire guide port and a resin discharge port.

  Hereinafter, the flat cable extrusion die according to the embodiment will be described. This flat cable extrusion mold is a member for manufacturing a flat cable. This flat cable is used as a power supply cable for a hybrid electric vehicle (HEV), an electric vehicle (EV) or the like.

<Configuration of flat cable>
For convenience of explanation, the flat cable 10 will be described (see FIG. 1). The flat cable 10 is an insulating coated core wire formed in a flat shape in which the outer peripheral portion of the conductor portion 11 is covered with the insulating coating portion 13.

  The conductor portion 11 is composed of a plurality of core wires 12 arranged in a line in parallel. The core wire 12 is a wire composed of one or more strands (not shown). For example, a stranded wire formed by twisting a plurality of strands can be adopted as the core wire 12. The strand which comprises the core wire 12 is the conducting wire formed with materials, such as aluminum, an aluminum alloy, copper, or a copper alloy. In addition, the wire may be subjected to a metal plating process such as tin or nickel.

  More specifically, as for the conductor part 11, adjacent core wires 12 are contacting at least one place of the extending direction. That is, the plurality of core wires 12 in the conductor portion 11 are electrically connected.

  The insulating coating portion 13 is formed by extruding the melted insulating coating material 14 in a form covering the outer peripheral portions of the plurality of core wires 12 and solidifying the insulating coating material 14. The insulating coating material 14 is a synthetic resin material having insulating properties. For example, a synthetic resin material such as an olefin resin or a vinyl chloride resin can be used as the insulating coating material 14.

  More specifically, the insulation coating portion 13 is formed in a long shape along the direction in which the plurality of core wires 12 are arranged in a cross-sectional view orthogonal to the extending direction of the conductor portion 11. Moreover, the insulation coating portion 13 is formed in a form that is in close contact with the outer peripheral portions of the plurality of core wires 12 and enters into the gaps between the plurality of core wires 12. Thereby, as for the flat cable 10, it is suppressed that the some core wire 12 disperses inside the insulation coating part 13, and the shape is stabilized. Furthermore, the insulation coating portion 13 may be interposed between the adjacent core wires 12 in a portion where the adjacent core wires 12 are not in contact with each other.

<Configuration of flat cable extrusion mold>
Next, the structure of the flat cable extrusion die 20 will be described (see FIGS. 2 and 3). The flat cable extrusion mold 20 employs a structure for manufacturing the flat cable 10 having a stabilized shape. More specifically, the flat cable extrusion mold 20 manufactures the flat cable 10 having a stabilized shape by allowing the insulating coating material 14 to enter the gaps between the plurality of core wires 12 more reliably.

  The flat cable extrusion mold 20 includes an inner mold 30 and an outer mold 50, and is configured by combining the inner mold 30 and the outer mold 50.

  The inner mold 30 is a portion that mainly guides the plurality of core wires 12 through (see FIGS. 2 to 4). More specifically, the inner mold 30 includes a base portion 42, a protruding portion 38, and an extending portion 36 in order from the rear to the front in the core wire passage direction S. And the inner metal mold | die 30 has the core wire guide part 32 penetrated along the core wire passage direction S over the whole, and the resin introduction part 44 penetrated along the core wire passage direction S in the base part.

  The core wire guide part 32 is a part formed so that a plurality of core wires 12 can be guided in a line in parallel. The core wire guide portion 32 is formed in a hole shape penetrating along the core wire passage direction S. More specifically, the core wire guide portion 32 has a core wire guide port 34 on the distal end side and a core wire introduction portion 39 having an inner space wider than the core wire guide port 34 on the rear side.

  The core wire guide port 34 is a portion that guides the plurality of core wires 12 in a row in parallel along the core wire passing direction S. The core wire guide ports 34 are formed in a shape in which a plurality of core wire passages 35 are arranged in a line in a direction orthogonal to the core wire passage direction S in a form in which a plurality of core wire passages 35 communicate with each other at the side portions (see FIG. 6).

  The core wire passage 35 is a hollow portion that is formed in a circular shape at the tip of the inner mold 30 (extension portion 36) and is formed so as to be able to pass through the core wire 12 along the extending direction. The core wire passage 35 is formed in a shape extending along the core wire passage direction S. The core wire passage 35 is formed in a shape along a circumscribed circle of the core wire 12 or a larger circle (here, slightly larger) in a cross-sectional view orthogonal to the core wire passage direction S. Further, the inner space of the plurality of core wire passages 35 communicates with each other at a place where circles along which the core wires pass are circumscribed or overlapped. That is, each core wire 12 that passes through the adjacent core wire passageway 35 can move forward in the core wire passage direction S in a form that can be contacted at a communicating portion of the adjacent core wire passageway 35.

  The core wire introduction part 39 is a part that auxiliaryly guides the plurality of core wires 12 moving toward the core wire guide port 34 behind the core wire guide port 34 in the core wire passage direction S. The core wire introduction portion 39 opens at the rear end portion in the core wire passing direction S of the inner mold 30 (base portion 42) and communicates with the core wire guide port 34. More specifically, the core wire introduction part 39 is formed in a taper shape in which the internal space gradually decreases in a cross-sectional view perpendicular to the core wire passage direction S from a portion extending linearly along the core wire passage direction S. And a portion that has been made.

  The base portion 42 formed at the rear end portion in the core wire passage direction S of the inner mold 30 is a portion formed in a substantially rectangular parallelepiped. The base 42 is formed in a flat shape along a direction orthogonal to the core wire passage direction S.

  The protruding portion 38 is a portion protruding in a tapered shape from the center of the surface on the front side in the core wire passing direction S of the base portion 42 toward the front. More specifically, the projecting portion 38 has a shape in which a substantially rectangular cross section gradually decreases in a cross-sectional view perpendicular to the core wire passing direction S from the rear end portion of the core wire passing direction S to the rear end portion of the extending portion 36. Is formed. And the outer peripheral surface of the protrusion part 38 is mainly comprised by the four slopes which incline toward the extension part 36. As shown in FIG.

  The extending part 36 is a part extending from the tip part of the protruding part 38 toward the front in the core wire passing direction S. The extending portion 36 that forms the tip portion of the inner mold 30 is formed in a flat shape along the direction in which the plurality of core wire passages 35 are arranged.

  A cut portion 37 is formed in the outer peripheral portion of the extending portion 36 along the core wire passing direction S. The cut portion 37 communicates with at least one of the portions of the outer peripheral portion of the extending portion 36 in the direction in which the plurality of core wire passages 35 are arranged (both in this case). It is formed toward the part. More specifically, the cut portion 37 is formed in a shape that gradually becomes narrower from the outer peripheral portion of the inner mold 30 toward the inner peripheral side. In FIG. 6, the cut-out part 37 formed in the shape which has the arc-shaped part along the opening edge part of each core wire passageway 35 of the both sides of a communicating part in the cross-sectional view orthogonal to the core wire passage direction S is shown. ing. But the shape of the notch part 37 is not restricted to the said shape, For example, you may form in substantially V shape.

  That is, since the opening edge part of the core wire guide port 34 is formed in the shape interposed between the adjacent core wires 12 in the communication part of the core wire passages 35, when there is no notch part 37, it is the extension part 36. The distance from the outer peripheral portion to the contact portion or the proximity portion between the core wires 12 increases. On the other hand, the adjacent core wires through the cut portion 37 are formed by forming the cut portion 37 so that the distance from the outer peripheral portion of the extension portion 36 to the contact portion or the proximity portion between the core wires 12 becomes smaller. The insulating coating material 14 can be fed into the 12 gaps.

  The resin introduction portion 44 is a portion that guides the insulating coating material 14 to positions on the outer peripheral side of the protruding portion 38 and the extending portion 36. That is, the melted insulating coating material 14 is sent to a position on the outer peripheral side of the protruding portion 38 and the extending portion 36 through the resin introducing portion 44. Here, the resin introduction portion 44 is a hole portion that penetrates along the core wire passage direction S, opens in a long shape along the longitudinal direction of the protruding portion 38 (extending portion 36), and extends into the protruding portion 38. Adjacent to each other (upper and lower). The resin introducing portion 44 is set to have a dimension larger than the longitudinal dimension of the protruding portion 38 in the longitudinal direction.

  The outer mold 50 is disposed on the outer peripheral side of the protruding portion 38 and the extending portion 36 of the inner mold 30, and the insulating coating material 14 sent through the resin introducing portion 44 of the inner mold 30 is extended to the protruding portion 38 and the extending portion 36. This is a portion that guides forward in the core wire passage direction S through the space between the outer periphery of the portion 36. More specifically, the outer mold 50 is disposed with a gap through which the insulating coating material 14 can pass with respect to the projecting portion 38 of the core wire guiding portion 32 and the outer peripheral portion of the extending portion 36. And this outer metal mold | die 50 has the resin discharge port 52 and the resin guide part 54 which connect internal space so that it may penetrate along the core wire passage direction S. As shown in FIG. That is, the outer mold 50 is formed so that the extending part 36 and the protruding part 38 of the inner mold 30 can be disposed inside the resin discharge port 52 and the resin guide part 54.

  The resin discharge port 52 can pass through a plurality of core wires 12 guided in a line in parallel through the core wire guide portion 32, and a direction in which the plurality of core wire passages 35 are arranged at the tip portion (the length of the extension portion 36). It is a hole that opens in a flat shape along (direction). The resin discharge port 52 is formed in a shape extending along the core wire passage direction S.

  Here, the inner mold 30 and the outer mold 50 are arranged in a form in which the tip portions are flush with each other. In other words, the resin discharge port 52 is formed in a shape and size that allows the extended portion 36 to be disposed on the inner side in a form in which a gap is provided over the entire circumference with respect to the outer peripheral portion of the extended portion 36. Yes. Here, the resin discharge port 52 has a substantially semicircular shape connecting a pair of straight portions along the longitudinal direction of the extending portion 36 and each end of the pair of straight portions in a cross-sectional view orthogonal to the core wire passage direction S. It is formed in the shape of a hole having a pair of curved portions.

  The resin guide portion 54 is formed behind the resin discharge port 52 in the core wire passing direction S, communicates with the internal space of the resin discharge port 52, and has an internal space larger than the resin discharge port 52. Here, the resin guide portion 54 is larger at the rear end portion in the core wire passage direction S of the outer die 50 than the rear end portion of the protrusion 38 of the inner die 30 in a cross-sectional view orthogonal to the core wire passage direction S. The resin inlet 44 has a size that includes the resin introduction portion 44 and opens in a substantially rectangular shape. That is, the resin guide part 54 communicates with the resin introduction part 44 in a state where the inner mold 30 and the outer mold 50 are combined. Further, the resin guide portion 54 is formed in a shape in which the internal space gradually decreases from the rear end portion of the outer die 50 in the core wire passage direction S toward the resin discharge port 52 in a cross-sectional view orthogonal to the core wire passage direction S. ing.

<Flat cable manufacturing method>
Next, a flat cable manufacturing method using the flat cable extrusion mold 20 will be described. The flat cable extrusion mold 20 is used by being set in an extruder that melts and extrudes the insulating coating material 14.

  First, in the flat cable extrusion die 20, the plurality of core wires 12 are sent in a line in parallel through the core wire guide port 34 of the inner die 30 (step (a)). In this step, for example, a plurality of core wires 12 are supplied from each storage body in which the core wire 12 is wound and stored on the upstream side in the core wire passing direction S of the flat cable extrusion die 20, and the plurality of core wires 12 are pulled out on the downstream side. It is good to be done. The plurality of core wires 12 are inserted into the core wire introduction portion 39 from the rear side of the core wire guide direction 32 of the core wire guide portion 32 of the inner mold 30 and are inserted into the core wire guide ports 34 to move forward in the core wire passage direction S. Is done. Thereby, the several core wire 12 moves to a downstream in a line in parallel with the form which contacts in the extension direction partially through the communication part of the adjacent core wire passageway 35 of the core wire guide port 34. As shown in FIG.

  Further, in the flat cable extrusion mold 20, the outer peripheral portions of the plurality of core wires 12 through which the insulating coating material 14 is drawn from the resin discharge port 52 in the step (a) through the gap between the inner mold 30 and the outer mold 50 are formed. Extrude in a covering form (step (b)). That is, the insulating coating material 14 melted by the extruder is extruded through the flat cable extrusion mold 20. First, the molten insulating coating material 14 is pushed into the resin introduction portion 44 of the inner mold 30 in a molten state or at least a soft state. After passing through the resin introduction portion 44, the insulating coating material 14 is pushed away between the outer mold 50 and the projecting portion 38 and between the outer mold 50 and the extending portion 36. In other words, the order is the order between the inner mold 30 and the resin guide 54 and between the inner mold 30 and the resin discharge port 52. Here, the insulation coating material 14 pushed away from the resin introduction portion 44 forward in the core wire passage direction S also extends to the gap between the inner mold 30 and the outer die 50 on both sides of the projecting portion 38, and passes through the core wire passage direction. In a cross-sectional view orthogonal to S, it is swept in an annular shape. Further, when the insulating coating material 14 passes through the outer peripheral side of the extending portion 36, it is partially pushed through the cut portion 37.

  The insulating coating material 14 discharged through the resin discharge port 52 moves toward the front of the core wire passing direction S while adhering to the outer peripheral portions of the plurality of core wires 12 coming out through the core wire guide port 34. At this time, in particular, the insulating coating material 14 discharged through the cut portion 37 enters the gap between the adjacent core wires 12 and adheres to the outer peripheral portion of the core wire 12.

  Thereafter, the insulating coating material 14 is formed by covering the outer peripheral portion of the conductor portion 11 constituted by the plurality of core wires 12 by the temperature of the insulating coating material 14 being lowered and solidifying. The insulating coating material 14 may be cooled by being immersed in water or the like, or may wait for the temperature to drop naturally.

  In addition, the said process (a) and (b) is performed simultaneously. However, at the start of the process, one of the processes (a) and (b) may be performed first while the other is started.

  According to the flat cable extrusion die 20 and the flat cable manufacturing method using the same according to the above embodiment, the inner die 30 having a tip formed in a flat shape along the direction in which the plurality of core wire passages 35 are arranged. However, in at least one of the two portions extending in the direction in which the plurality of core wire passages 35 are arranged in the outer peripheral portion of the tip portion, a concave shape is formed from the outer peripheral portion toward the communication portion of the plurality of core wire passages 35. The notch part 37 is provided. For this reason, the insulating coating material 14 can be inserted into the gap between the core wires 12 through at least one of the cut portions 37, and the shape of the flat cable 10 can be stabilized.

  Further, the cut portion 37 is formed in a shape that gradually becomes narrower from the outer peripheral portion of the inner mold 30 toward the communication portion between the plurality of core wire passages 35. According to this configuration, the cut portion 37 can be formed in a shape that reaches closer to the communication portion of the plurality of core wire passages 35. As a result, the insulating coating material 14 can be inserted further into the gaps between the plurality of core wires 12 guided through the core wire guide port 34, and the shape of the flat cable 10 can be more reliably stabilized. be able to.

  Further, the cut portions 37 are formed in both of the two portions in the direction in which the plurality of core wire passages 35 are arranged in the outer peripheral portion of the tip portion of the inner mold 30. According to this configuration, the insulating coating material 14 can be inserted into the gaps between the plurality of core wires 12 from both sides, and the shape of the flat cable 10 can be more reliably stabilized.

  Further, according to the configuration in which the inner mold 30 and the outer mold 50 are arranged in a positional relationship in which the tips are flush with each other, a plurality of insulation coating materials 14 are pressed against the plurality of core wires 12. The load applied to the core wire 12 can be reduced. In particular, when the core wire 12 formed of aluminum or the like having a lower strength than copper or the like is used, the positions of the inner mold 30 and the outer mold 50 are flush with each other (or close to each other). It is required to be arranged in a relationship. In this case, although the force with which the insulating coating material 14 is pressed against the plurality of core wires 12 tends to be weak, the shape is stabilized because the insulating coating material 14 enters the gaps between the core wires 12 through the cut portions 37. The flat cable 10 can be obtained. Thus, the present invention is more effective when the core wire 12 made of aluminum or the like is used.

  So far, the description has been made with the example in which the cut portions 37 are formed in both of the two portions in the direction in which the plurality of core wire passages 35 are arranged in the outer peripheral portion of the extending portion 36 of the inner mold 30. However, even when the cut portion 37 is formed on only one side, it is considered possible to manufacture the flat cable 10 having a stabilized form as compared with the case where the cut portion 37 is not formed.

  Further, the flat cable extrusion mold 20 has been described with an example in which the inner mold 30 and the outer mold 50 are arranged in a form in which the tip portions are flush with each other, but the present invention is not limited to this. . That is, the outer mold 50 may be disposed in a form in which the tip end portion is positioned in front of the tip end portion of the inner mold 30 in the core wire passing direction S. In this case, the outer mold 50 is within a range in which the plurality of core wires 12 (for example, core wires formed of aluminum or the like) are not damaged by cutting or the like due to the pressure of the insulating coating material 14 inside the resin discharge port 52. It is preferable that the front end of the inner mold 30 be set in front of the front end of the inner mold 30.

  Further, although the example in which the cut portion 37 is formed along the core wire passing direction S of the extending portion 36 has been described, it may be formed only at the distal end portion of the extending portion 36. That is, the cut portion 37 may be formed so that it can flow inside itself before the insulating coating material 14 is discharged from the resin discharge port 52.

  As described above, the flat cable extrusion mold 20 and the flat cable manufacturing method have been described in detail, but the above description is illustrative in all aspects, and the present invention is not limited thereto. The various modifications described above can be applied in combination as long as they do not contradict each other. And it is understood that the countless modification which is not illustrated can be assumed without deviating from the scope of the present invention.

DESCRIPTION OF SYMBOLS 10 Flat cable 12 Core wire 14 Insulation coating material 20 Flat cable extrusion die 30 Inner die 32 Core wire guide part 34 Core wire guide port 35 Core wire passage 36 Extension part 37 Cut part 50 Outer mold 52 Resin discharge port

Claims (5)

A flat cable extrusion mold for extruding a flat cable formed by covering the outer periphery of a plurality of core wires arranged in a line in parallel with an insulating coating material,
A plurality of core wire passages that open in a circular shape at the front end portion and that can pass through the core wire along the extending direction have core wire guide ports formed in a line in a form that communicates with each other at the side portions. The inner end mold is formed in a flat shape along the direction in which the plurality of core wire passages are arranged, and the plurality of core wires can be guided in a row in parallel.
It has a resin discharge port that opens in a flat shape along the direction in which the plurality of core wire passages are arranged at the front end portion, and the front end portion is flush with or ahead of the front end portion of the core wire guide port. And an outer mold disposed with a gap through which the insulating coating material can pass with respect to the outer peripheral portion of the inner mold, and
With
The inner mold is directed to at least one of the two portions in the direction in which the plurality of core wire passages are arranged in the outer peripheral portion of the tip portion, from the outer periphery to the communication portion of the plurality of core wire passages. A flat cable extrusion mold having a concave cut portion formed in the above manner. A flat cable extrusion die according to claim 1,
The said cut | notch part is a flat cable extrusion die currently formed in the shape which becomes narrow gradually toward the said communication part of these core wire passages from the outer peripheral part of the said inner metal mold | die. The flat cable extrusion mold according to claim 1 or 2,
The said cut | notch part is a flat cable extrusion metal mold | die each formed in both of two parts over the direction where the said several core wire passage way is located among the outer peripheral parts of the front-end | tip part of the said inner metal mold | die. The flat cable extrusion die according to any one of claims 1 to 3,
The inner mold and the outer mold are flat cable extrusion molds that are arranged in such a manner that their front ends are flush with each other. A method of manufacturing a flat cable formed by covering the outer periphery of a plurality of core wires arranged in a line in parallel with an insulating coating material,
(A) In the flat cable extrusion die according to any one of claims 1 to 4, the plurality of core wires are moved in parallel in a line downstream through the core wire guide port of the inner die. Process,
(B) In the flat cable extrusion mold, the insulating coating material is moved downstream in the step (a) from the resin discharge port through a gap between the inner mold and the outer mold. Extruding in a form covering the outer periphery of the core wire,
A method for manufacturing a flat cable.

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