JP5846955B2 - Coated wire marking method, marking device, and coated wire manufacturing device - Google Patents

Description

  The present invention relates to a method and an apparatus for marking a predetermined portion of a covered electric wire whose conductive wire is covered with an insulating coating, and an apparatus for manufacturing a covered electric wire provided with a marking device.

With the diversification of products and the like, in recent years, there are various types of covered electric wires according to desired performance. However, a coated electric wire in which a conductive wire is coated with an insulating coating is difficult to distinguish in appearance, and is often marked as an identifier as an identifier.
Furthermore, there is a demand for high accuracy with respect to various required performances. For example, when a defective part such as an unmelted resin constituting the insulating coating is detected, it is necessary to eliminate the defective part. In this case, it is impossible to dispose of the entire covered electric wire in which the defective portion is found, and it is intended to be used except for the defective portion, and the above-mentioned marking is given to clearly indicate the defective portion.

  As described above, many methods have been proposed as a method for marking a covered electric wire. For example, the marking method described in Patent Document 1 has been proposed for a configuration in which a marking head containing ink is brought into contact with a covered electric wire to color a predetermined portion.

As another method, Patent Document 2 proposes a method of irradiating the insulating coating of the covered electric wire with a laser so that the irradiated portion on the coated surface is concave and the ink is allowed to enter the concave portion.
However, in the above-described methods, for example, when the marked covered electric wire is wound around the winding drum, the marked ink may be transferred to the adjacent covered electric wire and the marking portion may be unclear.

For example, when the marked ink has poor deformability compared to the insulating coating, the ink may be peeled off along with the deformation during winding and unwinding of the covered electric wire.
Furthermore, as proposed in Patent Document 2, when a concave portion is formed by irradiating the surface of the insulation coating with a laser, unnecessary objects such as insulating coating debris lost by the laser irradiation adhere to other covered wires. There was also a fear.

JP-A-6-162839 JP-A-9-115364

  SUMMARY OF THE INVENTION An object of the present invention is to provide a marking method, a marking device, and a coated wire manufacturing apparatus including a marking device capable of reliably marking a predetermined portion of a covered wire.

The present invention, the conductor, for a given position of the covered electric wire coated with an insulating coating composed of crystalline resin is irradiated with laser light, the aforementioned facilities discoloration process to discolor the insulating coating, the color change process A crystallinity changing process for changing the crystallinity in the vicinity of the irradiated portion irradiated with the laser light to a value different from the crystallinity in the non-irradiated portion not irradiated with the laser light; It is a marking method for a covered electric wire, or a marking device for a covered electric wire provided with a laser irradiation section for changing the color of the insulating coating.

  The color changing treatment for changing the color of the insulating coating is to change the colored opaque insulating coating to a highly transparent or translucent color, or to change the color of the transparent or opaque insulating coating to colored or opaque. It is a concept that includes a process of changing colors to different colors, and a process of changing colors in an identifiable manner for a portion that has not been changed.

  The predetermined location is a concept including a location, a shape, a range, etc. according to a display purpose such as specifying a location based on a defective location, a predetermined interval, etc., or displaying an identifier or the like. Can do.

According to the present invention, marking that can be clearly shown can be applied to a predetermined portion of the covered electric wire.
Specifically, in order to change the color of the insulating coating itself by irradiating a predetermined portion of the insulating coating made of crystalline resin with an insulating coating for covering the conductor in the covered electric wire, and irradiating a predetermined portion of the insulating coating made of the crystalline resin with laser light. For example, as in the case of marking with ink, the marked ink moves to the adjacent covered electric wire, the marking portion becomes unclear, or the ink is deformed when the covered electric wire is wound or unwound. There is no fear of peeling off or unnecessary matter generated by laser irradiation adhering to other covered electric wires, and marking that can be clearly shown can be given to a predetermined portion of the covered electric wires.

Also, discoloration said insulating coating by varying the pre-Symbol discoloration treatment, the crystallinity of the irradiated portion near irradiated with the laser beam, the degree of crystallinity and different values of the non-irradiated portion which is not irradiated with the laser beam By using the crystallinity changing process to be performed, it is possible to prevent the insulation performance of the insulating coating from being deteriorated due to the marking and to perform marking that can be clearly shown.

Changing the crystallinity in the vicinity of the irradiated part irradiated with the laser beam to a value different from the crystallinity of the non-irradiated part not irradiated with the laser beam is the irradiation of the crystalline resin constituting the insulating coating. It is a concept that includes making the vicinity of a portion non-crystallized by the energy of laser light to be irradiated, crystallizing from a non-crystallized state, or increasing or decreasing the crystallinity .

  As an aspect of the present invention, the crystalline resin is made of PPS resin, and the outer surface of the conductive wire is made of a color different from that of the PPS resin, and the crystallinity changing process is applied to the insulating coating. Irradiation with the laser beam can be performed to improve the translucency of the PPS resin so that the outer surface of the conducting wire can be visually recognized from the outside.

The PPS resin is polyphenylene sulfide which is a crystalline thermoplastic resin.
The translucent process for improving the translucency of the PPS resin so that the outer surface of the conductive wire can be visually recognized from the outside is a process of making the opaque PPS resin transparent or translucent.

According to the present invention, it is possible to prevent the insulation performance of the insulation coating from being deteriorated by marking and to provide a marking that can be visually recognized with certainty.
Specifically, the outer surface of the conductive wire is configured in a color different from that of the PPS resin, and the laser beam is applied to the insulating coating so that the outer surface of the conductive wire is visible from the outside. Therefore, the outer surface of the conductive wire having a color different from that of the PPS resin can be visually recognized from the outside through the insulating coating with improved translucency. Therefore, without marking the insulating performance of the insulating coating by applying the marking, the portion of the insulating coating where the conductors with different colors can be visually recognized from the outside can be surely viewed.

Moreover, as an aspect of the present invention, the conducting wire can be constituted by a rectangular conducting wire having a flat cross section.
According to the present invention, for example, marking that can be surely visually recognized even when wound on a winding drum or the like can be easily applied.

  Specifically, since the cross section is flat, the flat cross section can be easily wound around a winding drum or the like without being twisted. Therefore, for example, in the winding state, by marking the surface on the outer peripheral surface side of the flat conducting wire, the marking can be surely visually recognized at the time of unwinding to use the flat conducting wire.

As an aspect of the present invention, the conductive wire can be composed of a conductor and an enamel layer formed on the outer surface of the conductor.
According to the present invention, marking that can be clearly shown can be applied to a highly insulated coated electric wire.

Further, as an aspect of the present invention, the predetermined portion can be a range determined based on a defective portion occurring in the insulating coating.
The defective portion may be a defect caused by an unmelted material or the like generated in the enamel layer in the case of a conductive wire having an insulating coating or an enamel layer, or a scratch generated on the surface of the insulating coating.

The range determined based on the defective portion occurring in the above-described insulating coating can be a range in various forms such as a length direction and a radial range based on the defective portion.
According to the present invention, the defective portion can be clearly indicated by the marking.

  Further, the present invention provides a covering means for covering the conductive wire with the insulating coating, a winding means for winding the covered electric wire with the conductive wire covered with the insulating coating, a detecting means for detecting a predetermined location, It is a manufacturing apparatus of a covered electric wire provided with the above-mentioned marking device which irradiates a predetermined place with a laser.

  According to the present invention, it is possible to manufacture a covered electric wire in which a marking that can be clearly specified is given at a predetermined location. Moreover, a covered electric wire can be wound up in the state which marked the predetermined location.

Further, as an aspect of the present invention, the predetermined portion can be a defective portion that occurs in the insulating coating.
According to the present invention, it is possible to manufacture a covered electric wire in which the defective portion is clearly indicated by marking. Moreover, a covered electric wire can be wound up in the state which marked the malfunctioning part. Therefore, when unwinding to use the covered electric wire, it is possible to surely check the defective portion clearly indicated by the marking. Therefore, for example, the marked defective part can be eliminated and only the non-defective part can be used efficiently.

  According to the present invention, it is possible to provide a marking method, a marking device, and a coated wire manufacturing apparatus provided with a marking device that can perform marking that can be clearly specified with respect to a predetermined portion of the covered wire.

Explanatory drawing of a covered electric wire. The block diagram of the manufacturing apparatus of a covered wire | conductor. Schematic of the manufacturing apparatus of a covered electric wire. The schematic perspective view of the manufacturing apparatus of a covered wire | conductor. Explanatory drawing of a malfunction detection part. Explanatory drawing about laser irradiation. The manufacturing flowchart of a covered electric wire.

An embodiment of the present invention will be described below with reference to the drawings.
FIG. 1 is an explanatory view of the covered electric wire 100, FIG. 2 is a block diagram of the covered electric wire manufacturing apparatus 1, FIG. 3 is a schematic view of the covered electric wire manufacturing apparatus 1, and FIG. A perspective view is shown.
Specifically, FIG. 1A shows a perspective view of the covered electric wire 100, and FIGS. 1B and 1C show perspective views of the covered electric wire 100 in which the transparent marking portion 120 is formed.

FIG. 5 is an explanatory diagram of the defect detection unit 4, FIG. 6 is an explanatory diagram of laser irradiation, and FIG. 7 is a manufacturing flowchart of the covered electric wire 100.
Specifically, FIG. 5A shows a schematic cross-sectional view of a detection situation in the defect detection unit 4, and FIG. 5B shows a schematic diagram of a detection result by the defect detection unit 4.

6A shows a schematic diagram of a scanning pattern of the CO ₂ laser beam Lb in the laser irradiation unit 5 with respect to the covered electric wire 100, and FIG. 6B shows a schematic diagram of another scanning pattern of the CO ₂ laser beam Lb. ing.

  As shown in FIG. 1A, the covered electric wire 100 has a flat cross section, and the outer peripheral surface of a flat conductor 101 made of copper or copper alloy is covered with an enamel layer 102, and further, the outer side of the enamel layer 102 is covered. It is a long electric wire covered with an insulating coating 103, and is used as, for example, a motor electric wire of an electric vehicle.

The enamel layer 102 is formed by applying a resin varnish to the outer peripheral surface of the flat conductor 101 and baking it, and is glossy reddish brown.
The insulating coating 103 is an insulating coating layer formed on the outer periphery of the enamel layer 102 by extrusion processing, and is composed of polyphenylene sulfide (hereinafter referred to as PPS resin) which is a crystalline thermoplastic resin. PPS resin has high strength and rigidity, and has excellent chemical resistance and wear resistance. For example, it ensures reliable insulation performance even in harsh usage environments such as motor wires. be able to. Note that the PPS resin is milky white different from the enamel layer which is glossy reddish brown.

  In the covered electric wire 100 having such a configuration, when an unmelted material is produced in the processing state of the resin varnish constituting the enamel layer 102 or the PPS resin constituting the insulating coating 103, the insulating coating serving as the outer surface of the covered electric wire 100 A defect protrusion 110 called “butsu” protrudes from 103.

The defect protrusion 110 is a perspective view of the covered electric wire 100 in which the transparent marking portion 120 in which the insulating coating 103 is made transparent by irradiating a CO ₂ laser beam Lb described later is shown in FIGS. As shown, there are two types of defect protrusions 110 a caused by the unmelted material 103 a of the insulating coating 103 and defect protrusions 110 b caused by the unmelted material 102 b of the enamel layer 102.

Next, the covered wire manufacturing apparatus 1 for manufacturing the covered wire 100 will be described with reference to FIGS.
The covered wire manufacturing apparatus 1 includes a control unit 2, a cover forming unit 3 connected to the control unit 2, a failure detection unit 4, a laser irradiation unit 5, and a winding unit 6. 100 can be wound up by the winding drum 62 of the winding unit 6.

  The control unit 2 controls the coating forming unit 3, the defect detection unit 4, the laser irradiation unit 5, and the winding unit 6 which will be described later by a control program stored in a storage unit (not shown), and the image detection program etc. A CPU or the like that can detect the defective protrusion 110 from the image captured by the detection unit 4 is used. Furthermore, the control part 2 is the structure which can carry out management control of the length of the covered electric wire 100 manufactured with the covered electric wire manufacturing apparatus 1. FIG.

  The covering forming unit 3 is an apparatus for forming a covered electric wire 100 covered with an insulating coating 103 made of PPS resin by covering an enameled electric wire 102a covered with an enamel layer 102 with a rectangular conductor 101 with a melted PPS resin.

  The defect detection unit 4 is an apparatus for photographing the covered electric wire 100 formed by the covering formation unit 3, and includes an upper detection camera 41 arranged on the upper side of the covered electric wire 100 and a lower detection arranged on the lower side of the covered electric wire 100. The camera 42 is configured.

  In addition, as shown to Fig.5 (a), the upper side detection camera 41 image | photographs the upper surface 100a of the covered electric wire 100 discharged | emitted from the coating | coated formation part 3, and flowing to the winding part 6 mentioned later which flows to the X direction, The detection camera 42 images the lower surface 100 b of the covered electric wire 100.

  In the defect detection unit 4, for example, in the image of the covered electric wire 100 photographed by the upper detection camera 41, as illustrated in FIG. 5B, the defect protrusion 110 b is generated on the upper surface 100 a and the side surface 100 c It can be confirmed that the defective protrusion 110a is generated. As described above, the defect detection unit 4 transmits the image of the covered electric wire 100 photographed by the detection cameras 41 and 42 to the control unit 2, and the control unit 2 performs image analysis on the received image of the covered electric wire 100 to detect the defect protrusion. 110 is detected.

  In FIG. 5, in order to describe the mode of the defective protrusion 110 generated on the upper surface 100a and the side surface 100c, the defective protrusion 110 is generated on the upper surface 100a and the side surface 100c in one cross section. There is almost no possibility that a plurality of defect projections 110 will be generated. In addition, the state where the defective protrusion 110b is generated on the upper surface 100a and the defective protrusion 110a is generated on the side surface 100c has been described. However, this is merely an example for facilitating understanding, and the generation location of the defective protrusions 110a and 110b is never shown. It is not a suggestion.

  The laser irradiation unit 5 includes a laser emitter 51 that emits laser light and an irradiation chip 52 that irradiates the laser light emitted from the laser emitter 51 toward the upper surface 100a of the covered electric wire 100. Are controlled by the control unit 2 to output laser light and to control ON / OFF of irradiation.

In this embodiment, the laser emitter 51 emits CO ₂ laser light Lb having a wavelength of 10.6 μm. Furthermore, CO ₂ laser beam Lb is FIG. 1 (b), the as shown in (c), CO ₂ laser beam Lb is the insulating coating 103 which is irradiated becomes transparent marking unit 120 and clarified by amorphization output It is set to irradiate with.

Further, as shown by a scanning line 53a in FIG. 6A, the laser irradiation unit 5 obliquely irradiates the CO ₂ laser light Lb irradiated from the irradiation chip 52 toward the rear in the X direction with respect to the X direction. When the width of the covered electric wire 100 is crossed by scanning in the direction, as shown by the dotted line in FIG. 6A, the original position in the width direction of the covered electric wire 100 is returned again and this is repeated.
Alternatively, the laser irradiation unit 5 may be scanned so as to have a bellows shape with respect to an oblique direction toward the rear in the X direction, as indicated by a scanning line 53b in FIG. 6B.

In addition, the diagonal direction toward the back of the X direction of the above-mentioned scanning lines 53a and 53b is the winding speed of the covered electric wire 100 in the winding part 6 mentioned later, ie, the X direction covered electric wire 100 which flows toward the winding part 6. The angle depends on the speed.
In addition, the output of the CO ₂ laser beam Lb and the size of the irradiation spot in the laser emitter 51 are also outputs that can sufficiently amorphize the insulating coating 103 in the irradiation time for the irradiated portion according to the speed of the coated electric wire 100 in the X direction. And the size of the irradiation spot.

The device interval L between the defect detection unit 4 and the laser irradiation unit 5 is set according to the length of marking based on the defect protrusion 110 detected by the defect detection unit 4. More specifically, for example, when the apparatus interval L is marked within a range of 1600 mm in the length direction around the defective protrusion 110, the CO ₂ laser beam Lb is irradiated from a position 800 mm upstream from the position of the defective protrusion 110. Since it is necessary, the laser irradiation unit 5 is disposed at a position upstream of 800 mm or more with respect to the defect detection unit 4, that is, the apparatus interval L is set to an interval of 800 mm or more. That is, the apparatus interval L is set to be equal to or greater than the distance from the position of the defective protrusion 110 to the upstream irradiation start position.

  The winding unit 6 includes a winding drum 62 that rotates about a horizontal rotating shaft 61, and is a device that winds the covered electric wire 100 around the outer peripheral surface 62 a of the winding drum 62. The start / stop of rotation is controlled.

Since the covered wire manufacturing apparatus 1 is configured as described above, the transparent marking portion 120 in which the insulating coating 103 on the upper surface 100a side is made transparent by the CO ₂ laser light Lb irradiated by the laser irradiation portion 5 is wound up. As shown in FIG. 4, the coil 62 is wound on the outer peripheral surface side of the covered electric wire 100 as shown in FIG. 4. The transparent marking part 120 based on 110 can be visually recognized.

The manufacturing method of the covered electric wire 100 using the covered electric wire manufacturing apparatus 1 comprised in this way is demonstrated below with FIG.
When the production of the covered electric wire 100 is started, the covering forming unit 3 and the winding unit 6 are operated (step s1), and the detection of the defective protrusion 110 by the defect detecting unit 4 is started (step s2).
When the defect projection 110 is detected by the defect detection unit 4 (step s3: Yes), the laser irradiation unit 5 irradiates the CO ₂ laser beam Lb to a predetermined range of the covered electric wire 100 based on the detected defect projection 110. (Step s4). The irradiation with the CO ₂ laser beam Lb is continued until a predetermined length has elapsed (step s5: No), and when the irradiation with the CO ₂ laser beam Lb has elapsed for a predetermined length (step s5: Yes), the laser irradiation unit 5 is stopped. (Step s6).

Then, the detection of the defective protrusion 110 and the production of the covered electric wire 100 accompanied with the irradiation of the CO ₂ laser beam Lb are repeated up to a predetermined length (step s7: No), and the covered electric wire 100 for a predetermined length is manufactured. (Step s7: Yes), the operation of the covering forming portion 3 and the winding portion 6 is stopped (Step s8), and the production of the covered electric wire 100 is finished.

Thus, the covered electric wire 100 manufactured by the above-described method using the covered electric wire manufacturing apparatus 1 has the occurrence position of the defective protrusion 110 of the covered electric wire 100 in which the enameled electric wire 102a is covered with the insulating coating 103 made of PPS resin. Since the insulating coating 103 itself is discolored by irradiating the CO ₂ laser beam Lb with respect to the reference predetermined range, it can be clearly shown in the predetermined range based on the position where the defective protrusion 110 of the covered electric wire 100 is generated. The transparent marking part 120 can be formed as a marking.

Specifically, the insulating coating 103 that covers the conductive wire in the covered electric wire 100 is made of PPS resin, and the CO ₂ laser beam is used with respect to a predetermined range based on the position where the defective protrusion 110 is generated in the insulating coating 103 made of PPS resin. Irradiation with Lb changes the color of the insulating coating 103 itself. Therefore, for example, as in the case of marking with ink, the marked ink moves to the adjacent covered wire, and the marking location becomes unclear, or along with the deformation at the time of winding or unwinding the covered wire, In the method in which the ink is peeled off or the insulation coating of the coated wire is irradiated with a laser to make the irradiation spot on the coating surface concave, and the ink penetrates into the concave portion, the lost insulation coating generated by laser irradiation It is possible to form the transparent marking portion 120 that can be clearly shown with respect to the predetermined range of the covered electric wire 100 without the possibility of unwanted substances such as debris adhering to other covered electric wires. Therefore, for example, a portion of the covered electric wire 100 in which the transparent marking portion 120 is formed that excludes the transparent marking portion 120 can be used as a motor electric wire in which the mixing of unnecessary materials is severely restricted.

  Moreover, in the covered electric wire manufacturing apparatus 1, since the covered electric wire 100 can be wound in the state which formed the transparent marking part 120 as marking in the predetermined range on the basis of the malfunction protrusion 110, in order to use the covered electric wire 100 When unwinding, it is possible to surely check the defective protrusion 110 clearly indicated by the transparent marking portion 120. Therefore, the predetermined range including the defective protrusion 110 marked by the transparent marking part 120 can be eliminated, and only the non-defective part can be used efficiently.

Different addition, by laser irradiation of CO ₂ laser light Lb, the crystallinity of the irradiated portion near irradiated with CO ₂ laser light Lb, the crystallinity of the non-irradiated portion which is not irradiated with CO ₂ laser beam Lb By changing to a non-crystallized value, the insulating coating 103 is made transparent, and the transparent marking portion 120 is prevented from deteriorating the insulation performance of the insulating coating 103 due to the formation of the transparent marking portion 120 and can be clearly shown as a marking. Can be formed.

Furthermore, the outer surface of the enameled wire 102a is glossy reddish brown, which is different from the milky white PPS resin, and the insulating coating 103 is irradiated with CO ₂ laser light Lb (step s4). By making a certain outer surface visible from the outside through the transparent marking part 120 that has been made transparent, it is possible to give a marking that can be reliably recognized.

Specifically, the outer surface of the enameled electric wire 102a is glossy reddish brown, which is different from milky white PPS resin, and the insulating coating 103 is irradiated with CO ₂ laser light Lb so that the outer surface of the enameled electric wire 102a is visible from the outside. Further, since the transparent marking portion 120 is formed by improving the translucency of the PPS resin, the outer surface of the enameled wire 102a can be visually recognized from the outside through the transparent marking portion 120.

  Therefore, in the insulating coating 103, the translucency is improved, and the transparent marking portion 120, which is a portion where the enameled electric wire 102a having a different color can be visually recognized from the outside, can be reliably recognized as a marking.

  Furthermore, as shown in FIGS. 1B and 1C, since the insulating coating 103 is made transparent to form the transparent marking portion 120, the defective protrusion 110b is caused by the unmelted material 102b. It can be confirmed whether it is a defective protrusion 110a caused by the unmelted material 103a. Therefore, for example, when many defective projections 110b due to the unmelted material 102b occur, the formation conditions and settings of the enamel layer 102 are reviewed, and when many defective projections 110a due to the unmelted material 103a occur, insulation A feedback process according to the state of occurrence of the defective projection 110 can be performed so as to review the coating processing conditions and settings of the coating 103, and the highly accurate covered electric wire 100 can be efficiently manufactured.

Moreover, since the cross section of the covered electric wire 100 has a rectangular shape, even if it is in a state of being wound around the winding drum 62, marking that can be surely recognized can be easily applied.
Specifically, since the cross section of the covered electric wire 100 is a flat angle, the flat cross section can be easily wound around the enamel layer 102 without being twisted. Therefore, for example, by forming the transparent marking portion 120 on the upper surface 100a on the outer peripheral surface side of the flat covered electric wire 100 in the winding state, the transparent marking portion is unrolled when the flat covered electric wire 100 is unwound. 120 can be visually recognized with certainty. In addition, the detection of the transparent marking part 120 at the time of unwinding may be detected non-contactingly with a sensor etc., and may be detected visually.

  In addition, since the covered wire 100 is formed by covering the enameled wire 102a formed of the flat conductor 101 and the enamel layer 102 formed on the outer surface of the flat conductor 101, the covered wire 100 is formed. A marking that can be clearly shown can be applied to 100.

As described above, in the correspondence between the configuration of the present invention and the above-described embodiment, the conductive wire of the present embodiment corresponds to the enameled wire 102a.
Similarly,
Crystalline resin corresponds to PPS resin,
The predetermined location corresponds to a range based on the occurrence position of the defective protrusion 110 forming the transparent marking portion 120,
The laser beam corresponds to the CO ₂ laser beam Lb,
The color changing process, the crystallinity changing process, and the translucent process correspond to the laser irradiation in step s4.
The color of the outer surface of the lead wire different from PPS resin corresponds to shiny reddish brown,
The conductor corresponds to the flat conductor 101,
The defective portion corresponds to the defective protrusion 110,
The coated wire marking device corresponds to the control unit 2, the defect detection unit 4, and the laser irradiation unit 5 in the coated wire manufacturing apparatus 1,
The winding means corresponds to the winding unit 6,
The detection means corresponds to the defect detection unit 4,
The covered wire manufacturing apparatus corresponds to the covered wire manufacturing apparatus 1,
The present invention is not limited to the above embodiment.

For example, in the above description, the transparent coating 120 is formed by irradiating the insulating coating 103 with the CO ₂ laser beam Lb. However, if the PPS resin constituting the insulating coating 103 is a laser beam that is amorphized by irradiation. In addition to the CO ₂ laser beam Lb, other laser beams such as a solid-state laser such as a YAG laser and a semiconductor laser may be irradiated.

  In addition, although PPS resin is used as the crystalline resin, polyphenylene sulfide (PPS), polymethylpentene (PPS), or polymethylpentene (PPS) may be used as long as it is a crystalline resin that changes color when irradiated with laser light such as CO2 laser light Lb. PMP), polytetrafluoroethylene (PTFE), tetrafluoroethylene-hexafluoropropylene copolymer (FEP), tetrafluoroethylene-ethylene copolymer (ETFE), tetrafluoroethylene / perfluoroalkyl vinyl ether copolymer (PFA) ), Aliphatic polyamides including polyamides 6, 66, 11, 12, 610, 46, polyamides 6T, 9T, MXD6, aromatic polyamides including polyphthalamide, polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyester Includes Lennaphthalate (PEN), Polybutylene Naphthalate (PBT), Polybutylene Naphthalate (PBN), Polyphenylene Ether (PPE), Polyphenylene Oxide (PPO), Polyether Ether Ketone (PEEK), Liquid Crystal Polymer (LCP) Different crystalline resins such as crystalline resins having a melting point of 150 ° C. or higher, such as aromatic polyester, syndiotactic polystyrene (SPS), polyacetal (POM), and the like may be used. For example, when a crystalline resin having a melting point of 150 ° C. or higher is used as described above, it is more preferable because it can suppress the deterioration of electric charging under a high temperature environment and improve the electric charging life of the covered electric wire 100. .

Furthermore, the PPS resin is used as the crystalline resin, and the CO ₂ laser beam Lb is irradiated to be non-crystallized to form the transparent marking portion 120. However, the translucency may be improved to a translucent state. However, even if the translucency is not improved, the color may be changed to such an extent that the color tone different from that of the portion not irradiated with the CO ₂ laser light Lb is changed. Conversely, a transparent and opaque crystalline resin may be colored and opaque by irradiation with CO ₂ laser light Lb.

In the above description, as shown by the scanning lines 53a and 53b in FIGS. 6 (a) and 6 (b), the CO ₂ laser beam is inclined to the rear in the X direction with respect to the X direction. Lb is scanned, that is, the laser irradiation unit 5 is moved in the width direction crossing the X direction or pivoted in the width direction to irradiate the coated electric wire 100 with the CO ₂ laser light Lb. The covered electric wire 100 may be irradiated with the CO ₂ laser beam Lb by moving or pivoting in the X direction.

In this case, even if the covered electric wire 100 is in a stopped state where it does not flow in the X direction or the covered electric wire 100 is in a state where it flows in the X direction, the irradiated portion of the CO ₂ laser light Lb is directed to the covered electric wire 100. By relatively moving in the X direction, it is possible to efficiently irradiate the irradiated portion.

Further, the energy of the CO ₂ laser light Lb is adjusted according to various conditions such as the speed in the X direction of the covered electric wire 100, and the size of the irradiation spot of the CO ₂ laser light Lb irradiated to the covered electric wire 100 is covered. You may form more than the width | variety of the electric wire 100. FIG. In this case, it is possible to efficiently irradiate the irradiated portion without moving or pivoting the laser irradiation unit 5 in the width direction.

Furthermore, although the range including the occurrence location of the defective protrusion 110 is clearly indicated by the transparent marking portion 120, the CO ₂ laser light Lb may be irradiated to the insulating coating 103 to display the logo or the product number of the covered electric wire 100. In the above description, the transparent marking portion 120 is formed by irradiating the upper surface 100a with the CO ₂ laser beam Lb in a predetermined range in the length direction. For example, the CO ₂ laser beam is formed in a circular shape around the defective protrusion 110. The circular transparent marking part 120 may be formed by irradiating Lb. Furthermore, you may form the transparent marking part 120 not only on the upper surface 100a of the covered wire | conductor 100 but only the surface where the actual malfunction protrusion 110 generate | occur | produced, or the perimeter.

  Further, for example, the transparent marking portion 120 may be formed for each fixed length as a scale having a fixed length regardless of the occurrence of the defective protrusion 110. At this time, the above-mentioned fixed length may be determined by the control unit 2, but the fixed length may be detected based on the weight of the winding drum 62 around which the covered electric wire 100 is wound. .

Moreover, you may provide the above-mentioned covered wire manufacturing apparatus 1 with the enamel layer formation part which forms the enamel layer 102 in the flat conductor 101. FIG.
Furthermore, in the above description, the insulative coating 103 or the enamel layer 102 in the case of the enamel wire 102 having the enamel layer 102 is defined as the defective protrusion 110, but the irregularities 110 are generated on the surface of the insulating coating 103. The defect detection unit 4 may detect a scratch or the like as the defect protrusion 110.

DESCRIPTION OF SYMBOLS 1 ... Coated wire manufacturing apparatus 2 ... Control part 4 ... Defect detection part 5 ... Laser irradiation part 6 ... Winding part 100 ... Covered electric wire 101 ... Flat conductor 102 ... Enamel layer 102a ... Enamel electric wire 103 ... Insulation coating 110 ... Defect protrusion 120 ... Transparent marking part Lb ... CO ₂ laser light

Claims (11)

Conductors, for a given portion of the coated electric wire coated with an insulating coating composed of crystalline resin is irradiated with laser light, and facilities discoloration process discolor the insulating coating,
The discoloration process
The degree of crystallinity in the vicinity of the irradiated portion irradiated with the laser light is changed to a value different from the degree of crystallinity in the non-irradiated portion not irradiated with the laser light, thereby changing the degree of crystallinity of the insulating coating. <br/> Method for marking coated wires. The crystalline resin is composed of PPS resin,
While configuring the outer surface of the conducting wire in a color different from the PPS resin,
The crystallinity changing process
The method for marking a covered electric wire according to claim 1 , wherein the insulating coating is irradiated with the laser light so that the outer surface of the conducting wire is visible from the outside so as to improve the translucency of the PPS resin. The marking method of the covered wire | conductor of Claim 1 or 2 which comprised the said conducting wire with the flat conducting wire of a cross-sectional flat angle. The marking method of the covered wire | conductor in any one of the Claims 1 thru | or 3 which comprised the said conducting wire with the conductor and the enamel layer formed in the outer surface of this conductor. The predetermined portion is
The marking method of the covered electric wire according to any one of claims 1 to 4 , wherein the range is determined based on a defective portion occurring in the insulating coating. A laser irradiation unit for irradiating laser light to a predetermined portion of a covered electric wire coated with an insulating coating made of a crystalline resin with a conductive wire to discolor the insulating coating ,
By the laser irradiation unit,
The insulation coating is discolored by changing the crystallinity in the vicinity of the irradiated portion irradiated with the laser light to a value different from the crystallinity of the non-irradiated portion not irradiated with the laser light . Marking device. The crystalline resin is composed of PPS resin,
The outer surface of the conducting wire is configured with a color different from that of the PPS resin,
The coated wire marking device according to claim 6 , wherein the insulating coating is irradiated with the laser light to improve the translucency of the PPS resin so that the outer surface of the conductive wire can be visually recognized from the outside. The marking device for a covered electric wire according to claim 6 or 7 , wherein the conducting wire is a rectangular conducting wire having a flat cross section. The marking device for a covered electric wire according to any one of claims 6 to 8 , wherein the conducting wire is constituted by a conductor and an enamel layer formed on an outer surface of the conductor. Coating means for coating the conductive wire with the insulating coating;
A winding means for winding the covered electric wire covering the conductive wire with the insulating coating;
Detection means for detecting a predetermined location;
An apparatus for manufacturing a covered electric wire, comprising: the marking device according to claim 6, wherein the predetermined portion is irradiated with a laser. The predetermined portion is
Apparatus for manufacturing a coated wire according to claim 1 0 in which a defect portion generated in the insulating coating.

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