JP2015168106A - Wire harness and method of manufacturing wire harness - Google Patents

Abstract

A wire harness capable of reducing the manufacturing cost and a method of manufacturing the wire harness are provided.
A wire harness (1) includes a wire bundle (11) having a plurality of wires (15) and a micro-molding machine (41) that is directly fixed to the outer periphery of the wire bundle (11) and covers the outer periphery of the wire bundle (11) in a mesh shape. And a binding portion 21 made of synthetic resin.
[Selection] Figure 1

Description

  The present invention relates to a wire harness and a method for manufacturing the wire harness.

  In a car or the like, a wire harness for transmitting electric power from a battery or the like or a control signal from a control device to various electronic devices to be mounted is routed. Some of such wire harnesses include various exterior members (functional members) such as a wire harness protector, a clamp, and a grommet (see, for example, Patent Document 1 and Patent Document 2).

Japanese Patent Laid-Open No. 10-321069 JP 2005-26178 A

  In the wire harness disclosed in Patent Literature 1 and Patent Literature 2, the wire bundle and the exterior member are integrally formed by injection molding using a pair of split molds.

  In the molding process of the wire harness by injection molding, since it is necessary to inject the molten resin at a relatively high pressure, the injection molding machine used for the molding tends to be a relatively large-scale facility. Conventionally, the factory for carrying out injection molding and the assembly factory for wire harnesses may be in different locations for securing the installation space for this injection molding machine. Costs for securing the factory site, transportation costs, etc. There is a problem that various costs required for manufacturing the wire harness increase.

  This invention is made | formed in view of the situation mentioned above, The objective is to provide the manufacturing method of the wire harness which can reduce manufacturing cost, and a wire harness.

In order to achieve the above-described object, the wire harness and the method for manufacturing the wire harness according to the present invention are characterized by the following points.
(1) an electric wire bundle having a plurality of electric wires;
A synthetic resin bundling portion formed by a micro molding machine so as to directly adhere to the outer periphery of the wire bundle and to cover a part of the outer periphery of the wire bundle in a mesh shape;
A wire harness comprising:
(2) The wire harness of (1) above,
The outer periphery of the wire bundle is exposed in at least a part of the eyes of the binding portion,
about.
(3) The wire harness according to any one of (1) and (2) above,
It further comprises a functional part fixed to the binding part,
about.
(4) The wire harness according to any one of (1) to (3) above,
The wire bundle is configured by twisting a plurality of wires,
about.
(5) An electric wire bundle having a plurality of electric wires, and a synthetic resin formed by a micro molding machine so as to directly adhere to the outer periphery of the electric wire bundle and cover a part of the outer periphery of the electric wire bundle in a mesh shape. A wire harness comprising a bundling portion,
A pair of golds defining a cavity including a cylindrical first cavity for accommodating a part of the wire bundle and a mesh-like second cavity continuously provided on the outer periphery of the first cavity. A mold clamping step of clamping a mold by placing a part of the wire bundle in the first cavity; and
An injection process of low-pressure injection of the molten synthetic resin into the cavity;
Including.

By the way, in order to solve the above-mentioned problems, the inventors of the present application have conceived that a wire bundle bundling portion (exterior member) in a wire harness is formed using a micro molding machine that is smaller than a conventional injection molding machine. did. According to the manufacturing method using a micro-molding machine, an exterior member such as a binding portion can be formed on a wire bundle in a wire harness assembly factory, so that manufacturing costs such as costs for securing a factory site and transportation costs Reduction is expected. With regard to a manufacturing method using such a micro molding machine, the inventors of the present application have said that the molten resin is injected into the cavity (inside the mold) in order to inject the molten resin at a lower pressure than the conventional injection molding machine. ) Was found to be difficult to flow.
In the wire harness having the configuration (1) and the method for manufacturing the wire harness having the configuration (5), the bundling portion is formed so as to cover the outer periphery of the wire bundle in a mesh shape. If the thickness in the radial direction of the wire bundle is the same, the cross-sectional area at each portion of the binding portion is reduced compared to the case where the wire bundle is formed so as to be uniformly covered. Thereby, since the flow path area of the part for forming the said binding part of a cavity becomes small, molten resin tends to flow through the inside of a cavity at the time of manufacture. As a result, the molten resin can be easily spread over the entire cavity. In addition, since the wire bundle is covered by the bundling portion formed in a mesh shape, for example, compared with a case where the entire outer periphery is uniformly covered in a cylindrical shape, a wide range in the longitudinal direction of the wire bundle with a small amount of resin. Can be bundled, and the bundling property of the electric wire can be improved. Moreover, since the wire bundle is bundled by the mesh-like bundling portion that easily expands and contracts, the flexibility of the wire harness can be improved. Therefore, according to the wire harness having the configuration (1) and the method for manufacturing the wire harness having the configuration (5), it is possible to satisfactorily realize the method for manufacturing the wire harness using the micro molding machine. And manufacturing costs can be reduced.
In the wire harness of the above (1), the outer periphery of the wire bundle may be exposed at a portion corresponding to the eyes of the binding portion formed in a mesh shape, or may be covered with the portion. . That is, the binding portion may have an opening corresponding to the eye, or a portion of the eye corresponding to the eye may be provided with a planar covering having a thickness smaller than that of the mesh portion. The above-described effects can be achieved even when the eyes are open, as well as when a planar coating is formed.
On the other hand, in the wire harness of (2) above, the outer periphery of the wire bundle is exposed in at least a part of the eyes of the binding portion. That is, at least a part of the eyes are open in the binding portion. When formed in this way, the wire bundle is covered with a part of the outer periphery of the wire bundle exposed, so a wide range in the longitudinal direction of the wire bundle can be bundled with a small amount of resin, and the bundling property of the wire is improved. can do. In addition, since the stretchability of the binding portion is improved by opening a part of the eyes, the flexibility of the wire harness can be improved.
The wire harness of the above (3) further includes a functional part fixed to the binding part. The functional part is a fixing member used for fixing the wire harness to the attachment part on the vehicle body side, for example. According to this wire harness, even when the molten resin is injected at a low pressure into the third cavity for forming the functional part in order to reliably form the functional part in the injection process at the time of manufacture, Since the second cavity connected to the third cavity is formed in a mesh shape, the molten resin easily flows inside the second cavity. As a result, the molten resin can be easily spread over the entire cavity.
According to the wire harness of the above (4), in the mold clamping process at the time of manufacture, a plurality of electric wires are twisted and arranged in a bundle, and the wire bundle is disposed in the cylindrical first cavity. Compared with the case where the separated electric wire bundle is arranged, the electric wire bundle can be reliably arranged in the first cavity, and the workability can be improved.

  ADVANTAGE OF THE INVENTION According to this invention, the manufacturing method of the wire harness which can reduce manufacturing cost, and a wire harness can be provided.

  The present invention has been briefly described above. Further, the details of the present invention will be further clarified by reading through a mode for carrying out the invention described below (hereinafter referred to as “embodiment”) with reference to the accompanying drawings. .

FIG. 1 is a front view showing a wire harness according to the present embodiment. FIG. 2 is an overall perspective view of the micro molding machine. FIG. 3 is a bottom view showing the upper mold of the micro molding machine shown in FIG. FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG. 3, showing the mold and the wire bundle after the mold clamping process. FIG. 5 is a front view showing a wire harness according to the first modification. FIG. 6 is a front view showing a wire harness according to the second modification.

  Hereinafter, the wire harness according to the present embodiment will be described with reference to FIGS. FIG. 1 is a front view showing a wire harness according to the present embodiment.

  As shown in FIG. 1, the wire harness 1 according to the present embodiment includes an electric wire bundle 11 in which a plurality of electric wires 15 are twisted to form a bundle, a binding portion 21 that is directly fixed to the outer periphery of the electric wire bundle 11, and a binding And a fixing part 31 (functional part) fixed to the part 21.

  The wire bundle 11 is formed by twisting an electric wire 15 having a conductive core wire (not shown) and an insulating coating 13 made of a synthetic resin covering the outer periphery of the core wire into a bundle shape. ing. That is, the electric wire bundle 11 has a plurality of electric wires 15. In addition, although this embodiment demonstrated the case where the wire bundle 11 had only the electric wire 15, it is good also as a structure by which other linear members other than an electric wire were bundled together, for example. Moreover, as will be described later, the electric wires 15 may be bound by the binding portion 21 in a state where they are not twisted.

  The binding portion 21 is made of, for example, a hard synthetic resin such as polypropylene, and is integrally formed with the wire bundle 11 by low pressure injection molding using a micro molding machine, which will be described later, to bind the wire bundle 11. The binding portion 21 is formed in a mesh shape and is directly fixed to the outer periphery of the wire bundle 11 so as to cover the outer periphery of the wire bundle 11. That is, the binding portion 21 covers the outer periphery of the wire bundle 11 so that the outer periphery of the wire bundle 11 is exposed at a portion corresponding to the eyes of the binding portion 21 and is covered with the net portion.

  The fixing portion 31 is made of a synthetic resin such as polypropylene. The fixing portion 31 is used for fixing the wire harness 1 to a mounting portion (not shown) on the vehicle body side that is provided at a routing location where the wire harness 1 is routed. In the present embodiment, the fixing portion 31 is fixed to the binding portion 21 at two joint portions 32 on one end side and the other end side in the longitudinal direction in the vicinity of the center in the longitudinal direction of the binding portion 21. 11 is formed so as to extend in the outer peripheral direction.

  Next, the manufacturing method of the wire harness 1 using a micro molding machine is demonstrated.

  In the method for manufacturing the wire harness according to the present embodiment, the mold 43 that defines the cavity 63 inside is clamped so that the wire bundle 11 is placed inside the cavity 63, and the melted process is performed. An injection step of injecting the synthetic resin into the cavity 63 at a low pressure.

FIG. 2 is an overall perspective view of the micro molding machine.
As shown in FIG. 2, the micro molding machine 41 for integrally molding the binding portion 21 and the fixing portion 31 to the wire bundle 11 is a molding machine that can be operated by one worker without external power such as an electric motor, It is composed of a synthetic resin mold 43, a mold clamping device (not shown), and a low pressure injection device 45 for injecting molten resin into the mold 43 under pressure.

  The low pressure injection device 45 has a heating cylinder 47 provided with a heater for heating and melting synthetic resin such as polypropylene, a plunger 49 for injecting the molten resin in the heating cylinder 47 from a nozzle (not shown), and the plunger 49 is advanced. An injection cylinder 51 to be driven, a handle 53 for driving the injection cylinder 51, and a temperature controller 55 for maintaining the heating temperature of the heating cylinder 47 at a desired temperature. It is supported by.

  Note that the micro molding machine in this embodiment has a maximum amount of resin that can be molded by one injection molding of about 10 g, and when the mold 43 is clamped, an air cylinder or a link is used. It can be used manually. Therefore, the low pressure injection device 45 may drive the injection cylinder 51 by external power such as an electric motor or air. More specifically, as the micro molding machine 41, for example, a well-known “injection molding apparatus” disclosed in JP 2010-260297 A, JP 2012-30429 A, JP 2013-103492 A, and the like. Can be used.

  3 is a bottom view showing the upper mold of the micro molding machine shown in FIG. 2, and FIG. 4 is a position of the IV-IV line in FIG. 3 showing the mold and the electric wire bundle after the mold clamping process. FIG. The mold 43 is a horizontal split mold having a lower mold 61 and an upper mold 67. As shown in FIG. 3, an upper cavity 67A is formed on the mold dividing surface (lower surface) of the downward upper mold 67. Has been. Although not shown, a lower cavity having the same shape as the upper cavity 67A is formed on the mold dividing surface (upper surface) of the upward lower mold 61. Then, the lower die 61 and the upper die 67 are clamped together and the lower cavity 61 and the upper cavity 67A are integrated to define the cavity 63 inside. When the mold 43 is clamped in a state where the wire bundle 11 is disposed inside the cavity 63, the mold 43 and the wire bundle 11 are in the state shown in FIG.

  As shown in FIG. 4, the cavity 63 includes a cylindrical first cavity 64 for housing a part of the wire bundle 11 in the longitudinal direction (hereinafter, simply referred to as the wire bundle 11), and a first cavity 64. A second cavity 65 is provided on the outer periphery of the cavity 64 so as to form a mesh, and a third cavity 66 is provided on the second cavity 65 to form the fixing portion 31.

  In order to form the cavity 63, as shown in FIG. 3, the upper cavity 67A is connected to the semi-cylindrical upper first cavity 64A and the outer peripheral side of the upper first cavity 64A (backward in the drawing in FIG. 3). The upper second cavity 65A is provided, and the upper third cavity 66A is connected to the upper second cavity 65A. The lower cavity includes a lower first cavity, a lower second cavity, and a lower third cavity having shapes corresponding to the upper first cavity 64A, the upper second cavity 65A, and the upper third cavity 66A. Then, the lower mold 61 and the upper mold 67 are clamped, so that a cavity 63 including the first cavity 64, the second cavity 65, and the third cavity 66 is defined inside the mold 43.

  The upper mold 67 includes a gate 68 that allows the upper third cavity 66 </ b> A and the nozzle of the low-pressure injection device 45 to communicate with each other.

In the mold clamping process, the mold 43 described above is clamped so that the wire bundle 11 is disposed in the first cavity 64. Thereby, as shown in FIG. 4, the second cavity 65 and the third cavity 66 excluding the first cavity 64 in the cavity 63 are defined as a filling space. In other words, in this embodiment, a filling space is defined by the outer periphery of the wire bundle 11 accommodated in the first cavity 64, and the second cavity 65 and the third cavity 66. The capacity of the filling space when the mold 43 is clamped is several cm ³ . In the present embodiment, the mold 43 is described as being a horizontal mold, but it may be a vertical mold.

  In the injection process following the mold clamping process, the molten synthetic resin is injected from the gate 68 at a low pressure. That is, the molten resin is injected from the third cavity 66. This is because the molten resin is surely spread over the entire third cavity 66, so that the fixed portion 31 that is higher in demand than the bundling portion 21 is surely formed in the desired shape. . The molten resin injected into the third cavity 66 is also filled into the second cavity 65 through the third cavity 66. In the present embodiment, since the second cavity 65 is formed in a mesh shape, for example, the cross-sectional area in each part is small as compared with the case where the entire outer periphery is formed so as to cover a cylindrical shape. For this reason, the pressure applied to the molten resin in each portion does not decrease, and the molten resin easily flows inside. As a result, the molten resin quickly spreads over the entire second cavity 65. For example, in the filling process of the molten resin, a part of the resin solidifies before the filling is completed, and the resin spreads over the entire second cavity 65. It is possible to prevent the occurrence of unforeseen circumstances.

(Modification 1)
With reference to FIG. 5, the wire harness which concerns on the 1st modification of embodiment is demonstrated. FIG. 5 is a front view showing a wire harness according to the first modification. As shown in FIG. 5, the wire harness 1 </ b> B according to Modification 1 is different from the above-described wire harness 1 in that it includes a covering portion 23. Since the other points are the same as those of the wire harness 1, the same reference numerals are given to the same components and the description thereof is omitted.

  In the said embodiment, although the bundling part 21 was demonstrated as perfect mesh shape, in the wire harness 1B which concerns on the modification 1, a part of exposed part of the wire bundle 11 is covered with the bundling part 21. FIG. . For example, depending on the shape or the like of the wire bundle 11, the first cavity 64 may not be completely occupied by the wire bundle 11 in the mold clamping process described above, and a slight gap may remain on the outer peripheral side of the first cavity 64. . In such a case, since the molten resin flows into the remaining portion in the injection process, the binding portion 21 does not have a complete mesh shape in the portion, and as shown in FIG. In a portion corresponding to the eyes, a planar covering portion 23 that covers the outer periphery of the wire bundle 11 and has a smaller thickness than the net portion is formed. In this case, as shown in FIG. 5, both the exposed portion and the covered portion of the portion corresponding to the eyes of the binding portion 21 exist on the outer periphery of the wire bundle 11.

(Modification 2)
With reference to FIG. 6, the manufacturing method of the wire harness and wire harness which concern on the 2nd modification of embodiment are demonstrated. FIG. 6 is a front view showing a wire harness according to the second modification. As shown in FIG. 6, the wire harness 1 </ b> C according to the modified example 2 has the above-described wire harness in that it does not have the fixing portion 31 (functional portion) and the wire 15 in the wire bundle 11 is not twisted. Different from 1. Since the other points are the same as those of the wire harness 1, the same reference numerals are given to the same components and the description thereof is omitted.

  As shown in FIG. 6, the wire harness 1 </ b> C according to the modified example 2 includes an electric wire bundle 11 </ b> B in which a plurality of electric wires 15 are bundled so as to extend substantially parallel to each other, and a binding portion 21 that is directly fixed to the outer periphery of the electric wire bundle 11 </ b> B. It is equipped with.

  In the method of manufacturing the wire harness according to the modified example 2, in the mold clamping process, the mold 43 is clamped so that the undisrupted wire bundle 11 </ b> B is disposed in the first cavity 64.

  Further, in the method of manufacturing the wire harness according to the modified example 2, although not illustrated, the gate 68 is formed in the upper second cavity 65A of the upper die 67, and the molten resin is discharged from the second cavity 65 in the injection process. Eject. Thereby, the molten resin is filled in the second cavity 65, and the wire harness 1C shown in FIG. 6 is obtained.

  Below, the effect | action and effect of the manufacturing method of the wire harnesses 1, 1B, 1C and wire harness which concern on embodiment are demonstrated.

The wire harnesses 1, 1 </ b> B, 1 </ b> C according to the embodiment are directly fixed to the outer periphery of the wire bundle 11 having the plurality of electric wires 15 and the wire bundle 11, and cover the outer periphery of the wire bundle 11 in a mesh shape. And a synthetic resin binding unit 21 formed by a micro molding machine 41.
Thus, since the binding part 21 is formed so as to cover the outer periphery of the wire bundle 11 in a mesh shape, for example, compared with the case where it is formed so as to cover the entire outer periphery in a cylindrical shape, breakage in each part of the binding part 21 is performed. The area is small, and the molten resin tends to flow through the cavity 63 during manufacturing. As a result, the molten resin can be easily spread over the entire cavity 63. Moreover, since the wire bundle 11 is covered with the bundling portion 21 formed in a mesh shape in a state where a part of the outer periphery of the wire bundle 11 is exposed, for example, compared with a case where the entire outer periphery is formed to be covered in a cylindrical shape. And a wide range in the longitudinal direction of the wire bundle 11 can be bundled with a small amount of resin, and the bundling property of the wires can be improved. Moreover, since the wire bundle 11 is bundled by the mesh-like bundling portion 21 having excellent stretchability, the flexibility of the wire harness can be improved. As a result, according to the wire harnesses 1, 1 </ b> B, and 1 </ b> C according to the embodiment, the wire harness manufacturing method using the micro molding machine 41 can be satisfactorily realized, and the manufacturing cost can be reduced.

Moreover, the manufacturing method of the wire harness which concerns on embodiment is directly adhered to the outer periphery of the electric wire bundle 11 which has the some electric wire 15, and this electric wire bundle 11, and covers the outer periphery of a part of this electric wire bundle 11 in mesh shape. Thus, the manufacturing method of a wire harness provided with the synthetic resin binding part 21 formed of the micro molding machine 41. Then, a cavity 63 including a cylindrical first cavity 64 for accommodating a part of the wire bundle 11 and a mesh-like second cavity 65 connected to the outer periphery of the first cavity 64 is provided inside. A mold clamping step for clamping a pair of molds 41 (63, 67) to be defined so that a part of the wire bundle 11 is disposed in the first cavity 64, and a molten synthetic resin inside the cavity 63 An injection process for low-pressure injection.
According to the method for manufacturing a wire harness according to the embodiment having such a configuration, the method for manufacturing the wire harness using the micro molding machine 41 can be satisfactorily realized for the same reason as described above. Cost can be reduced.

Moreover, the wire harnesses 1 and 1B according to the embodiment further include a fixing part 31 fixed to the binding part 21, and in the method for manufacturing the wire harness, the cavity 63 is connected to the second cavity 65. A third cavity 66 for forming the fixing portion 31 fixed to the binding portion 21 is further included. In the injection step, synthetic resin is injected into the third cavity 66.
Thereby, the wire harnesses 1 and 1B further including the fixing portion 31 fixed to the binding portion 21 are manufactured. According to this manufacturing method, even when the molten resin is injected into the third cavity 66 for forming the fixing portion 31 at a low pressure, the second cavity 65 connected to the third cavity 66 has a mesh shape. Therefore, the molten resin easily flows through the second cavity 65. As a result, the molten resin can be easily spread over the entire cavity 63.

Moreover, in the wire harnesses 1 and 1B according to the embodiment, the wire bundle 11 is configured by twisting a plurality of wires 15, and in the method of manufacturing the wire harness, in the mold clamping process, the plurality of wires 15 are formed. The mold is clamped so that a part of the wire bundle 11 formed by twisting is arranged in the first cavity 64.
In this manufacturing method, since the electric wire bundle 11 in which the plurality of electric wires 15 are twisted into a bundle shape is arranged in the cylindrical first cavity 64, the electric wire bundle 11 in a separated state that is not twisted (for example, Compared with the case where the electric wire bundle 11B shown in FIG. 6 is arranged, the electric wire bundle 11 can be surely arranged in the first cavity 64, and workability can be improved.

Moreover, in the wire harnesses 1 and 1B according to the embodiment, the outer periphery of the wire bundle 11 is exposed in at least a part of the eyes of the binding portion 21.
Thereby, since the wire bundle 11 is covered in a state where a part of the outer periphery of the wire bundle 11 is exposed, a wide range in the longitudinal direction of the wire bundle 11 can be bundled with a small amount of resin, and the bundling property of the wires is improved. be able to. Moreover, since the stretchability of the binding part 21 is improved by opening a part of the eyes, the flexibility of the wire harness can be improved.

  The technical scope of the present invention is not limited to the embodiment described above. The above-described embodiments can be accompanied by various modifications and improvements within the technical scope of the present invention.

  For example, in the above embodiment, the bundling portion 21 and the fixing portion 31 are made of relatively hard polypropylene, but when the bundling portion 21 and the fixing portion 31 are provided in a portion where further flexibility is required, These may be formed of a synthetic resin softer than polypropylene, such as polyvinyl chloride.

  Moreover, in the said embodiment, although it was set as the structure which forms the fixing | fixed part 31 (functional part) fixed to the binding part 21, it is good also as a structure which does not provide the fixing | fixed part 31 like a modification, A configuration may be employed in which other elements that are not fixed portions are formed.

  Moreover, in the said embodiment, although it was set as the structure which the fixing | fixed part 31 adheres to the binding part 21 in two places of the junction part 32, the fixing | fixed part 31 adheres to the coating | coated part 23 of the binding part 21 in the modification 1. It does not matter as a configuration.

  Moreover, although the said embodiment demonstrated the structure by which the binding part 21 was fixed to the linear wire bundle 11 which does not have a branch part, the wire bundle 11 has a branch part, The said branch part of this wire bundle 11 The binding portion 21 may be formed so as to cover the outer periphery of the portion including the.

  In the above embodiment, the mold 43 is made of synthetic resin, but may be made of metal. In the said embodiment, since exterior components are shape | molded by low pressure injection, the metal mold | die 43 can be made from a synthetic resin.

  Moreover, in the said modification 2, although it was set as the structure by which the outer periphery of the electric wire bundle 11 was coat | covered with the coating | coated part 23 in the one part of the eyes of the several binding part 21, the form of the coating | coated part 23 is However, the configuration is not limited thereto, and the outer periphery of the wire bundle 11 may be exposed in at least a part of the eyes of the binding portion 21. For example, a configuration may be adopted in which a part of one eye is covered by the covering portion 23 instead of the whole eye.

DESCRIPTION OF SYMBOLS 1 Wire harness 1B Wire harness 1C Wire harness 11 Electric wire bundle 11B Electric wire bundle 13 Coating | covering 15 Electric wire 21 Binding part 23 Covering part 31 Fixing part (functional part)
41 Micro molding machine 43 Mold 45 Low pressure injection device 63 Cavity 64 First cavity 64A Upper first cavity 65 Second cavity 65A Upper second cavity 66 Third cavity 66A Upper third cavity 67 Upper mold 67A Upper cavity 68 Gate

Claims (5)

A wire bundle having a plurality of wires;
A synthetic resin bundling portion formed by a micro molding machine so as to directly adhere to the outer periphery of the wire bundle and to cover a part of the outer periphery of the wire bundle in a mesh shape;
A wire harness comprising: The outer periphery of the wire bundle is exposed in at least a part of the eyes of the binding portion,
The wire harness according to claim 1. It further comprises a functional part fixed to the binding part,
The wire harness according to any one of claims 1 and 2, characterized in that: The wire bundle is configured by twisting a plurality of wires,
The wire harness according to any one of claims 1 to 3, characterized in that: An electric wire bundle having a plurality of electric wires, and a synthetic resin bundling portion formed by a micro-molding machine so as to adhere directly to the outer periphery of the electric wire bundle and cover a part of the outer periphery of the electric wire bundle in a mesh shape; A method of manufacturing a wire harness comprising:
A pair of golds defining a cavity including a cylindrical first cavity for accommodating a part of the wire bundle and a mesh-like second cavity continuously provided on the outer periphery of the first cavity. A mold clamping step of clamping a mold by placing a part of the wire bundle in the first cavity; and
An injection process of low-pressure injection of the molten synthetic resin into the cavity;
The manufacturing method of the wire harness characterized by including this.

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