JP2014167925A - Method of producing composite electric wire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of producing a composite electric wire which gives sufficient adhesion to both a conductive linear body and a plurality of high-strength continuous long fibers, and has high mechanical strength.SOLUTION: A method of producing a composite electric wire provided with a plurality of high-strength continuous long fibers along the longitudinal-direction axis includes a step of delivering a bundle of a high-strength continuous long fiber on a virtual plane, a fiber opening step of attracting the bundle flowing on the virtual plane in the direction vertical to the virtual plane and holding the positional state of the high-strength continuous long fibers, while imparting deflection to the high-strength continuous long fibers so as to be separated mutually in parallel, a plating step of applying a plating of a conductive material to the high-strength continuous long fibers and a recovery step of bundling the high-strength continuous long fibers together and recovering them continuously.

Description

  The present invention relates to a method of manufacturing a composite electric wire provided with continuous long fibers along a longitudinal axis, and particularly relates to a method of manufacturing a composite electric wire provided with a plurality of high-strength continuous long fibers along a longitudinal axis.

  There is a composite electric wire in which mechanical strength is increased by giving high-strength continuous long fibers along the longitudinal axis of a conductive linear body serving as a main line. In such a composite electric wire, if the adhesion between the conductive linear body and the high-strength continuous long fiber is insufficient, the mechanical properties of the high-strength continuous long fiber cannot be sufficiently reflected in the composite electric wire.

  By the way, as one of such composite electric wires, a high-strength continuous long fiber having a negative linear expansion coefficient is given to a conductive material having a positive linear expansion coefficient, thereby suppressing thermal expansion and increasing mechanical strength. There are composite wires. Such a composite electric wire is used in a place where thermal expansion and contraction due to a temperature change is a problem, and is also used for a trolley wire or a suspended wire for a railway electric facility.

  For example, in Patent Document 1, a groove extending along the longitudinal direction is provided in the outer peripheral portion of a conductive linear body, and a rod-shaped body made of a polymer material having a negative linear expansion coefficient, a yarn prepreg, A composite electric wire in which high-strength continuous long fibers such as fibers wound with a sheet prepreg are arranged and fixed with an adhesive is disclosed. High-strength continuous long fibers can be continuously and uniformly pushed into the grooves formed in the conductive linear body from the outside, and the fibers in the grooves can be kept pressed during bonding, improving adhesion. Furthermore, it states that the fiber density can be improved and the mechanical properties of high-strength continuous long fibers can be sufficiently imparted to the composite electric wire.

  A composite electric wire is also known in which a plurality of high-strength continuous long fibers are provided along the longitudinal axis of the electric wire to increase the mechanical strength.

  For example, in Patent Document 2, a bundle of high-strength continuous long fibers made of a polymer material having a negative coefficient of linear expansion is surrounded by a conductive material having a positive coefficient of linear expansion while mechanically reinforcing each other. A composite electric wire which is brought into close contact with each other is disclosed. A composite electric wire is obtained by inserting a plurality of high-strength continuous long fibers made of a polymer material having a negative linear expansion coefficient into a cylindrical tube made of a conductive material and swaging them.

  In Patent Document 2, prior to swaging, high-strength continuous long fibers are bundled and plated on the outer periphery, and a bundle of high-strength continuous long fibers is inserted into a cylindrical tube made of the same type of conductive material as this plating. The composite wire is obtained by swaging. It is stated that the adhesive strength between the conductive material and the high-strength continuous long fiber body is improved by this method, and the mechanical properties of the high-strength continuous long fiber can be more reflected in the composite electric wire.

JP 2006-172838 A JP 2008-235259 A

  In addition to the composite electric wires that suppress the thermal expansion as described above and increase the mechanical strength, in the composite electric wires provided with a plurality of high-strength continuous long fibers, each of the plurality of high-strength continuous long fibers and the conductive linear body In other words, the high mechanical strength of high-strength continuous long fibers cannot be efficiently reflected in the composite electric wire.

  The present invention has been made in view of such circumstances, and the object of the present invention is to sufficiently provide adhesion between the conductive linear body and the plurality of high-strength continuous long fibers, and to provide high mechanical strength. It is providing the manufacturing method of the composite electric wire which has.

  A method of manufacturing a composite wire according to the present invention is a method of manufacturing a composite wire in which a plurality of high-strength continuous long fibers are provided along a longitudinal axis, and the bundle of high-strength continuous long fibers is sent out on a virtual plane. A step of sucking the bundle flowing on the imaginary plane in a direction perpendicular to the imaginary plane to give a deflection, and separating the high-strength continuous long fibers so as to be parallel to each other while maintaining the position state thereof. The method includes a fiber step, a plating step for plating the high-strength continuous long fiber with a conductive material, and a collection step for continuously collecting the high-strength continuous long fiber by bundling.

  According to such an invention, the method includes the step of directly applying to each of the high-strength continuous long fibers a conductive material made of plating that bears at least a part of the conductive linear body. Adhesion between each of the continuous strength continuous fibers can be sufficiently provided, and a composite electric wire having high mechanical strength can be provided. Further, the conductive material can be uniformly plated on the surface of the high-strength continuous long fiber, and variation in the distribution of electrical resistance in the longitudinal direction can be reduced. Furthermore, it is possible to obtain a composite electric wire with higher electrical conductivity and lower electrical resistance and less calorific value.

  The above-described invention may include a step of forming a twisted fiber bundle obtained by twisting the high-strength continuous long fibers after the recovery step. Furthermore, the method may further include a step of further twisting a plurality of the twisted fiber bundles. According to this invention, the relative position fluctuation | variation of several high intensity | strength continuous continuous fibers can be suppressed, and the composite electric wire which has high mechanical strength can be given.

  Furthermore, the above-described invention may include a step of embedding the high-strength continuous long fibers in a conductive linear body made of a conductive material. According to this invention, the main part of the conductive linear body and the plating that bears a part of the conductive linear body given to the high-strength continuous long fibers are integrated, and the conductive linear body and Adhesion between each of the plurality of high-strength continuous long fibers can be sufficiently provided, and a composite electric wire having high mechanical strength can be provided.

  Furthermore, in the above-described invention, the plating step includes an electroless plating step for applying electroless plating to each of the high-strength continuous long fibers, and each of the high-strength continuous long fibers subjected to electroless plating. An electroplating application step for performing electroplating. According to this invention, a conductive material made of plating that bears at least part of the conductive linear body can be efficiently applied to each of the high-strength continuous long fibers.

  Furthermore, in the above-described invention, between the electroless plating application step and the electrolytic plating application step, a step of sending the bundle of high-strength continuous long fibers onto a virtual plane; And a second opening step for maintaining the position state of the continuous continuous long-strand fibers while being spaced apart from each other in parallel with each other. According to this invention, the conductive material made of electrolytic plating that bears at least a part of the conductive linear body can be efficiently applied directly to each of the high-strength continuous long fibers.

  Furthermore, in the above-described invention, the conductive material may be substantially made of a copper alloy, and the electrolytic plating application step may be a step of performing electrolytic copper plating. According to this invention, it is possible to provide a composite electric wire having excellent conductivity characteristics.

  Furthermore, in the above-described invention, the high-strength continuous long fibers may be made of a low thermal expansion polymer material. The low thermal expansion polymer material may have a negative coefficient of linear expansion. According to such an invention, since the adhesion between the conductive linear body and each of the plurality of high-strength continuous long fibers is sufficiently provided, it is made of a low thermal expansion polymer material and further has a negative linear expansion coefficient. Even in such a case, a composite electric wire having high mechanical strength can be provided without causing separation between the conductive linear bodies having different mechanical properties and the high-strength continuous long fibers.

It is a perspective view of the composite electric wire manufactured by the manufacturing method by this invention. It is sectional drawing of the composite electric wire manufactured by the manufacturing method by this invention. It is process drawing which shows the manufacturing method by this invention. It is a figure showing 1 process of the manufacturing method by this invention. It is a figure showing 1 process of the manufacturing method by this invention. It is a figure showing 1 process of the manufacturing method by this invention. It is a figure showing 1 process of the manufacturing method by this invention. It is a figure showing 1 process of the manufacturing method by this invention.

  First, the details of the composite electric wire obtained by the manufacturing method according to the present invention will be described with reference to FIGS.

  As shown in FIGS. 1 and 2, the composite electric wire 1 is a long electric wire for guiding electric power and has a substantially circular cross section. The composite electric wire 1 includes a conductive linear body 2 as a conductive main line and high-strength continuous long fibers 3 provided as a core wire in order to increase the mechanical strength of the conductive linear body 2.

  The conductive linear body 2 is made of a conductive material for power transportation, and is made of a highly conductive material such as copper or a copper-based alloy, for example.

  The high-strength continuous long fiber 3 has a tensile strength higher than that of the conductive material 2 and is, for example, a high-strength fiber such as carbon fiber or aramid fiber. Here, for the purpose of reducing the elongation in the longitudinal direction of the composite electric wire 1 due to a temperature change, it is a continuous long fiber made of a polymer material having a low thermal expansion coefficient and having a negative thermal expansion coefficient. One fiber diameter of the high-strength continuous long fiber 3 is about 10 microns.

  The high-strength continuous long fibers 3 are collectively arranged in the vicinity of the central axis in the longitudinal direction of the composite electric wire 1, that is, in the vicinity of the central axis in the longitudinal direction of the conductive linear body 2. The matrix 2 ′ of the long fiber assembly region 4 is made of substantially the same material as that of the conductive body 2.

  By the way, in the long fiber assembly region 4, the high-strength continuous long fibers 3 are not in contact with each other, and compared with the case where all the high-strength continuous long fibers 3 are bundled in one place, the contact with the matrix 2 ′. The area can be increased. Thereby, strong adhesion with the matrix 2 'is obtained. Further, since the matrix 2 ′ is substantially the same material as the conductive linear body 2, the matrix 2 ′ and the conductive linear body 2 can be firmly bonded. That is, the high-strength continuous long fiber 3 can be firmly fixed to the conductive linear body 2.

  Here, even if the thermal history applied to the composite electric wire 1 is increased, each of the plurality of high-strength continuous long fibers 3 is firmly fixed by the matrix 2 ′. Distortion due to the difference in coefficient of linear expansion between the matrix 2 and the matrix 2 can be dispersed. Therefore, no peeling occurs between the high-strength continuous long fibers 3 and the matrix 2 '. That is, even when a polymer material having a negative linear expansion coefficient is applied, each of the plurality of high-strength continuous long fibers 3 and the conductive linear body 2 can be firmly bonded and fixed. .

  Next, the manufacturing method of the composite wire 1 as described above will be described in detail with reference to FIG.

  Referring to FIG. 4, a high-strength continuous long fiber bundle 3a in which high-strength continuous long fibers 3 are bundled is sent onto a virtual plane 25 (first sending step: S1). The fibers are opened in a state of being spaced apart so as to be parallel on the virtual plane 25 (first opening step; S2). Specifically, when the high-strength continuous long-fiber bundle 3a is pulled out in one direction from the bobbin 21 wound with the high-strength continuous long-fiber bundle 3a toward the virtual plane 25 and passes through the fiber opening processing unit 22. Then, the air is sucked downward by the downdraft generated by the intake pipe 23 to give “bend” (see FIG. 4B). As a result, the high-strength continuous long-fiber bundle 3a is spread in the lateral direction perpendicular to the above-described drawing direction, and the high-strength continuous long-fiber bundles 3a are opened one by one.

  The high-strength continuous long-fiber bundle 3a that has been opened is taken up while the lateral position is chucked by the rear roll 24 at the rear stage of the opening processing unit 22 (opened fiber 3b). That is, when the opened fiber 3b is taken up by the rear roll 24, the opened fiber 3b is taken up in a state of being arranged apart from each other on the virtual plane 25.

  Next, the high-strength continuous long fiber 3 of the spread fiber 3b is plated (plating process: S11). The plating process (S11) is subdivided into an electroless plating process (S3), a second delivery process (S4), a second opening process (S5), and an electrolytic plating process (S6).

  Referring to FIG. 5, in the electroless plating step (S3), as a pretreatment, a pretreatment agent made of an ion exchange resin as a raw material is applied to each surface of the high-strength continuous long fibers 3 of the spread fibers 3b by a spray 31. Is done. The spread fibers 3b are allowed to pass through the plating tank 32 while being arranged apart from each other when projected onto the virtual plane 26. Through ion exchange by pretreatment, metal ions adhere to the surface of the spread fiber 3b, and precipitates made of the same material as the matrix 2 'are generated. Thereby, a film made of the same material as the matrix 2 ′ is formed on the surface of the spread fiber 3 b. Prior to the pretreatment, the high-strength continuous long fibers 3 of the spread fibers 3b can be washed.

  In the electroless plating step (S3), the spread fibers 3b are arranged so as to be spaced apart from each other, so that each of the high-strength continuous long fibers 3 of the spread fibers 3b is reliably plated. The high-strength continuous long fiber 3 made of a polymer material has a very low electrical conductivity, but the electroless plating step (S3) forms a coating of the same material as the highly conductive matrix 2 'such as copper or a copper-based alloy. By giving, it becomes the conductive coating fiber 3c. As a result, it is possible to easily provide a coating of the same material as the matrix 2 'having higher conductivity at a higher speed in the later-described electrolytic plating step (S6).

  After the electroless plating step (S3), the conductive coating fiber 3c is appropriately bundled and wound around a roller (not shown) in order to drain the plating solution remaining on the conductive coating fiber 3c or route it in the factory. Taken. Therefore, prior to the electrolytic plating step (S6) described later, the wound conductive coating fiber 3c is sent out (second sending step; S4) and opened again (second opening step; S5). The second delivery step (S4) and the second opening step (S5) are the same as the first delivery step (S1) and the first opening step (S2), respectively. Description is omitted.

  Referring to FIG. 6, electrolytic plating is performed on the conductive coating fiber 3 c (electrolytic plating step; S <b> 6). Specifically, the conductive coating fiber 3 c opened on the virtual plane 27 passes through the electrolytic solution in the plating tank 42. The same material as the matrix 2 ′ is plated on the surface of the plating tank 42. Since the conductive coating fiber 3c has high conductivity, a coating of the same material as the matrix 2 'can be obtained quickly, and a thick coating can be obtained in a short time. Further, by the second fiber opening step (S5), the high-strength continuous long fibers 3 of the conductive coated fibers 3c are in a state of being arranged on a virtual plane, and the distance between the counter electrodes (not shown) can be made constant. . Therefore, a coating of the same material as the thick matrix 2 'can be stably provided.

  The conductive coating fiber 3c obtains an electrolytic plating film made of the same material as that of the matrix 2 'and becomes a plated high-strength continuous long fiber 3d. The electrolytic plating step (S6) is a step of applying a matrix 2 'made of electrolytic copper plating. In this case, since the conductive linear body 2 is also copper or a copper-based alloy, the adhesion between the conductive linear body 2 and the high-strength continuous long fibers 3 is further strengthened.

  Referring to FIG. 7, the plated high-strength continuous long fibers 3d are converged into a high-strength continuous long fiber bundle 3e (recovery step; S7). Specifically, the plated high-strength continuous long fibers 3d that have been opened are bundled according to a guide 43 that bundles them, and are wound around the bobbin 44 as a high-strength continuous long-fiber bundle 3e.

  Subsequently, the high-strength continuous long fiber bundle 3e is opened and twisted to produce a primary twisted fiber bundle (primary twisting step; S8). Further, a secondary twisted fiber bundle 3f is formed by further twisting a plurality of such twisted fiber bundles (secondary twisting step; S9). For example, the secondary twisting step (S9) may be omitted. Further, only the primary twisting step (S8) may be provided.

  Next, the secondary twisted fiber bundle 3f is embedded in the conductive matrix 2 '(embedding step; S10). That is, the composite electric wire 1 in which the secondary twisted fiber bundle 3f is covered with the conductive matrix 2 'is obtained. In the embedding step (S10), for example, as shown in FIGS. 8A and 8B, the secondary twisted fiber bundle 3f is inserted into the hollow portion of the conductive matrix 2 ′ that is a cylindrical body, This is fed while being rotated to the center 45 a of the four dies 45, and pressure forged by the dies 45. According to such swaging processing, it is preferable that the continuous composite electric wire 1 can be obtained continuously, but other known composite methods can also be adopted. The embedding step (S10) may be omitted.

  By the steps S1 to S11 described above, it is possible to obtain the composite electric wire 1 having a high mechanical strength by sufficiently giving the respective adhesion between the conductive linear body 2 and the plurality of high-strength continuous long fibers 3. In addition, by uniformly coating the surface of the high-strength continuous long fiber 3 with the same material as that of the matrix 2 ′, variations in the distribution of electrical resistance in the longitudinal direction can be reduced. Furthermore, by using the same material as that of the highly conductive matrix 2 ′ such as copper or a copper-based alloy, the composite electric wire 1 having a higher electrical resistance and a lower electric resistance and a smaller calorific value can be obtained.

  In this embodiment, the plating process (S11) includes an electroless plating process (S3), a second delivery process (S4), a second opening process (S5), and an electrolytic plating process (S6). However, for example, only the electroless plating step (S3) may be performed. Moreover, you may abbreviate | omit a 2nd delivery process (S4) and a 2nd fiber opening process (S5).

  As mentioned above, although the typical Example by this invention was described, this invention is not necessarily limited to this, A person skilled in the art will be able to perform various without departing from the gist of the present invention or the scope of the appended claims. Alternative embodiments and modifications may be found.

DESCRIPTION OF SYMBOLS 1 Composite electric wire 2 Conductive linear body 2 'Matrix 3 High-strength continuous long fiber 4 Long fiber gathering area | region 22 Opening process part 32 Electroless plating tank 42 Electrolytic plating tank 43 Guide 44 Bobbin

Claims (9)

A method of manufacturing a composite electric wire provided with a plurality of high-strength continuous long fibers along a longitudinal axis,
Delivering the bundle of high-strength continuous filaments on a virtual plane;
A fiber opening step for sucking the bundle flowing on the virtual plane in a direction perpendicular to the virtual plane to give the deflection and maintaining the position state while separating the high-strength continuous long fibers so as to be parallel to each other;
A plating construction step of plating the high-strength continuous long fiber with a conductive material;
A recovery step of bundling the high-strength continuous long fibers and continuously recovering them;
The manufacturing method of the composite electric wire characterized by including.   2. The method of manufacturing a composite electric wire according to claim 1, further comprising a step of forming a twisted fiber bundle obtained by twisting the high-strength continuous long fibers after the collecting step.   The method of manufacturing a composite electric wire according to claim 2, further comprising a step of twisting a plurality of the twisted fiber bundles.   4. The method of manufacturing a composite electric wire according to claim 1, further comprising a step of embedding the high-strength continuous long fibers in a conductive linear body made of a conductive material.   The plating step includes electroless plating for applying electroless plating to each of the high-strength continuous long fibers, and electroplating for applying electrolytic plating to each of the high-strength continuous long fibers subjected to electroless plating. The method of manufacturing a composite wire according to claim 1, further comprising a step. Between the electroless plating construction step and the electrolytic plating construction step,
Delivering the bundle of high-strength continuous filaments on a virtual plane;
The second opening step of maintaining the position state while separating the high-strength continuous long fibers so as to be parallel to each other on the virtual plane, The composite electric wire according to claim 5, Production method.   The method for manufacturing a composite electric wire according to claim 5 or 6, wherein the conductive material is substantially made of a copper alloy, and the electrolytic plating step is a step of performing electrolytic copper plating.   8. The method of manufacturing a composite electric wire according to claim 1, wherein the high-strength continuous long fibers are made of a low thermal expansion polymer material. 9. The method of manufacturing a composite electric wire according to claim 8, wherein the low thermal expansion polymer material has a negative coefficient of linear expansion.