JP2017004652A - Coating device and coating method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coating device and a coating method capable of measuring a deposited amount of a liquid containing a coating material onto a conductor part of an electric wire.SOLUTION: A film thickness measurement means 6 irradiates light and measures a film thickness d of an emission liquid film LF according to reflected light to measure the deposited amount of the emission liquid to the conductor part in a liquid state. By measuring the deposited amount of the emission liquid and knowing in advance the deposited amount of the emission liquid required for generating a film of an anticorrosion material on the entire surface of a coating area A, it is predicted whether or not a film of the coating material can be formed on the entire surface of a coating area A before the emission liquid is dried.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a coating apparatus and a coating method for coating an exposed conductor portion of an electric wire with a coating material.

  Conventionally, a method of forming an anticorrosive film with an anticorrosive material (coating material) on a conductor portion exposed from an aluminum electric wire has been proposed (see, for example, Patent Document 1). In patent document 1, the corrosion of a conductor part is suppressed by apply | coating the anticorrosion material which is a synthetic resin which has fluidity | liquidity to a conductor part, and forming an anticorrosion film.

JP 2014-130703 A

  However, in the invention described in Patent Document 1, since the anticorrosion material is a fluid liquid, surface tension is generated when the anticorrosion material adheres to the surface of the conductor portion, and the anticorrosion material flows from the conductor portion. there were. If the amount of the anticorrosive material is small, the anticorrosive material flows, and thus the anticorrosion film may not be formed on a part of the surface of the conductor portion after the anticorrosive material is cured or dried, resulting in insufficient anticorrosion. was there. Moreover, when the part in which the anticorrosion film is not formed is detected after hardening or drying of the anticorrosion material, the anticorrosion material must be applied again, and the time required for forming the anticorrosion film becomes long.

  Therefore, it has been desired to predict whether or not an anticorrosion film is formed on the entire surface of the conductor portion before the anticorrosive material is cured or dried. Accordingly, the amount of anticorrosive material necessary to form the anticorrosive coating on the entire surface of the conductor portion is grasped in advance and the amount of anticorrosive material is measured by measuring the actual amount of adhesion. A method of predicting whether or not an anticorrosion coating is formed on the entire surface of the conductor part before curing or drying of the conductor is conceivable. However, even though the amount of the anticorrosive material discharged or emitted can be measured, it has been difficult to measure the amount of adhesion to the conductor surface in the liquid state.

  The objective of this invention is providing the coating apparatus and the coating method which can measure the adhesion amount of the liquid containing the coating material to the conductor part of an electric wire.

  In order to solve the problems and achieve the object, the invention described in claim 1 is a coating apparatus that coats an exposed conductor portion of an electric wire with a coating material, the holding means for holding the electric wire, Optical means for measuring the film thickness of the liquid film formed on the conductor, and an emitting means for emitting the liquid containing the covering material from the emitting portion, a moving means for relatively moving the emitting portion and the holding means A region of the conductor portion where the liquid is emitted after moving the emitting portion and the holding means relative to each other by the moving means while emitting the liquid to the emitting portion. And a control unit that causes the film thickness measuring unit to measure the film thickness.

  The invention described in claim 2 is the invention according to claim 1, wherein the electric wire is an aluminum electric wire.

  According to a third aspect of the present invention, in the invention according to the first or second aspect, the holding unit holds a plurality of the electric wires side by side, and the moving unit includes the emitting unit and the holding unit. The film thickness measuring unit is configured to be relatively movable with respect to the emitting unit, and the control unit is configured to emit the liquid to the emitting unit. The film thickness measuring means is moved relative to the holding means along the parallel direction so that the film thickness measuring means follows the light emitting section, and the film thickness measuring means measures the film thickness. It is a feature.

  According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the control unit is configured to perform the movement by the moving unit based on the film thickness measured by the film thickness measuring unit. The emitting unit and the holding unit are moved relative to each other, and the liquid is emitted again to the emitting unit.

  The invention described in claim 5 is the invention described in any one of claims 1 to 4, further comprising voltage applying means for applying a voltage to the emitting portion and the conductor portion, wherein the emitting portion is It is characterized by comprising metal.

  The invention described in claim 6 is characterized in that, in the invention described in any one of claims 1 to 5, the covering material is an anticorrosive material.

  The invention described in claim 7 is a coating method in which the exposed conductor portion of the electric wire is covered with a covering material, and the liquid containing the covering material is emitted from the emitting portion, and the emitting portion and the electric wire are relative to each other. After being moved, the coating method is characterized in that the film thickness of the film formed by the liquid is optically measured for a region of the conductor portion where the liquid is emitted.

  According to the first and seventh aspects of the present invention, the film thickness of the film formed by the liquid is optically measured for the region of the conductor portion where the liquid containing the covering material is emitted. By irradiating light to the film and measuring the film thickness based on the reflected light, it is possible to measure the adhesion amount of the liquid containing the coating material to the conductor part. By measuring the amount of liquid attached, if the amount of liquid attached necessary to form a coating film on the entire surface of the conductor is known in advance, before the liquid is dried or the coating material is cured In addition, it is possible to predict whether or not a coating material film is formed on the entire surface of the conductor portion. In addition, when the adhesion amount of the liquid is insufficient, the coating material film can be formed on the entire surface of the conductor portion by emitting the liquid again and increasing the adhesion amount.

  Further, the liquid emission amount can be emitted while adjusting the emission amount by comparing the liquid emission amount with the adhesion amount where the liquid actually adheres. That is, when the adhesion amount is smaller than the necessary amount, the emission amount can be increased, and when the adhesion amount is sufficiently larger than the necessary amount, the emission amount can be decreased. If the liquid is emitted while adjusting the emission amount in this way, a coating material film can be formed on the entire surface of the conductor portion, and waste of the liquid can be reduced.

  According to the invention described in claim 2, the electric wire can be reduced in weight because the electric wire is an aluminum electric wire.

  According to the third aspect of the present invention, a plurality of electric wire conductors can be formed with a simple configuration by moving the emission portion and the holding means relative to each other along the direction in which the electric wires are arranged while emitting the liquid to the emission portion. The part can be covered with a covering material. Furthermore, the film thickness of the liquid adhering to the conductor portion immediately after the liquid is emitted can be measured by moving the emission portion relative to the holding means so that the film thickness measuring means follows the emission portion.

  According to the invention described in claim 4, by moving the holding means and the emitting portion relative to each other by the moving means based on the film thickness measured by the film thickness measuring means, and by causing the emitting means to emit the liquid again. Further, the liquid can be selectively emitted to the portion where the adhesion amount is insufficient, and unevenness can be further suppressed.

  According to the fifth aspect of the present invention, by applying a voltage to the emitting portion and the conductor portion of the electric wire for charging, the liquid emitted from the emitting portion is charged and attracted to the conductor portion. As the liquid is electrically attracted to the conductor portion in this way, the liquid is less likely to be repelled by the surface tension on the surface of the conductor portion, and the covering material can be prevented from flowing from the surface of the conductor portion. It can coat | cover with a coating material so that a part may not be exposed.

  According to the invention described in claim 6, corrosion of the conductor portion can be suppressed by covering the conductor portion with the anticorrosive material. The anticorrosion material is more preferably a water-based urethane resin paint. By dissolving or dispersing the urethane resin paint in water, the anticorrosion material can be used as a liquid containing the anticorrosion material and can be easily handled. .

It is a perspective view which shows the structure of the whole coating | coated apparatus which concerns on embodiment of this invention. It is a perspective view which shows the electric wire with a terminal with which a coating | covering material is coat | covered with the said coating | coated apparatus. It is sectional drawing which shows typically a mode that the film thickness of the liquid film formed on the surface of the metal member by the film thickness measurement means of the said coating | coated apparatus is measured. It is sectional drawing which shows typically a mode that an emitted liquid adheres to the metal surface of the said electric wire with a terminal.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The coating apparatus 1 of this embodiment is an apparatus which coat | covers the coating | coated area | region A mentioned later of the some electric wire 100 with a terminal with the anticorrosive material as a coating | covering material, as shown in FIG. The spray gun 2 as the emitting means for emitting the emitted liquid, the voltage applying means 3 for applying a voltage to the nozzle 21 of the spray gun 2 and an electrode portion 521 described later, and the movement for moving the nozzle 21 and the film thickness measuring means 6 Means 4; holding means 5 for holding a plurality of terminal-attached electric wires 100 side by side; film thickness measuring means 6 for measuring the film thickness of the output liquid film LF, which will be described later; control means (not shown) for controlling the entire apparatus; Is provided. In the present embodiment, as shown in FIG. 1, the parallel direction of the plurality of terminal-attached electric wires 100 is the X direction, the longitudinal direction of the terminal-attached electric wires 100 is the Y direction, and the direction intersects the X direction and the Y direction. Is the Z direction.

  As shown in FIG. 2, the terminal-attached electric wire 100 includes an aluminum electric wire 200 as an electric wire and a terminal fitting 300 connected to an end of the aluminum electric wire 200. The aluminum electric wire 200 includes a conductor portion 200A made of aluminum or an aluminum alloy, and an insulating coating 200B that covers the outside of the conductor portion 200A. Terminal fitting 300 is made of an appropriate metal such as copper, for example, and includes first caulking portion 300A that is caulked to a portion of conductor portion 200A that is exposed from insulating coating 200B, and second caulking that is caulked to insulating coating 200B. It has a fastening part 300B and an electrical connection part 300C that is electrically connected to the counterpart terminal, and is electrically connected to the conductor part 200A. Of the exposed metal portion of the terminal-attached electric wire 100, a portion other than the electrical connection portion 300C is prevented as the covering region A (that is, the exposed conductor portion 200A, the first caulking portion 300A, and the second caulking portion 300B). Ingredients are coated.

  The anticorrosion material is, for example, a water-based urethane resin, and becomes an emission liquid by being dissolved or dispersed in water. That is, the anticorrosive material remains when the emitting liquid is dried on the metal surface, and the metal is covered with the anticorrosive material. As described later, the anticorrosive material is dissolved or dispersed so that the emission liquid has a transmittance of a predetermined value (for example, 10%) or more in the wavelength range of the light emitted by the film thickness measuring means 6 as described later. To do.

  The spray gun 2 includes a nozzle 21 serving as an emission unit that emits the emission liquid, an unillustrated accommodation unit that accommodates the emission liquid, a flexible connection unit (not illustrated) that connects the nozzle 21 and the accommodation unit, and pressure. And a pressurizing part (not shown) that emits the emitted liquid to the nozzle 21 by adding, and the Z direction shown in FIG. 1 (that is, the direction intersecting the plane including the parallel direction and the longitudinal direction of the terminal-attached electric wires 100). The emission liquid is emitted in the emission direction. The spray gun 2 emits the emitted liquid in a mist form by including air, for example. The nozzle 21 is made of a conductive metal such as iron or aluminum.

  The voltage application unit 3 includes a DC power source 31, a first connection part 32 that is electrically connected to an electrode part 521 described later, and a second connection part 33 that is electrically connected to the nozzle 21. The DC power source 31 is assumed to apply a voltage of, for example, 20 kV between the first connection portion 32 and the second connection portion 33. In the present embodiment, the first connecting portion 32 is connected to the negative electrode of the DC power source 31 and the second connecting portion 33 is connected to the positive electrode of the DC power source 31. That is, the voltage applying means 3 has the electrode portion 521 having a negative charge. A voltage is applied so that the nozzle 21 is charged with a positive charge. In addition, two independent DC power supplies may be used, and the first connection portion may be connected to the negative electrode of one DC power supply and the second connection portion may be connected to the positive electrode of the other DC power supply. The potential difference between the ground portion and the potential difference between the ground potential and the second connection portion may be different from each other.

  The moving means 4 has, for example, three linear motion motors that advance and retreat along the X, Y, and Z directions, respectively, and the nozzle 21 and the film thickness measuring means 6 can be translated in the X, Y, and Z directions. The nozzle 21 and the film thickness measuring means 6 are moved three-dimensionally while keeping the emission direction in the Z direction.

  The holding means 5 is a terminal holding unit that sandwiches and holds the electric wire placing part 51 having a groove part on which the aluminum electric wires 200 of the plural electric wires with terminals 100 are placed and the electric connection parts 300C of the plural terminal fittings 300 from the Z direction. Part 52. The terminal holding portion 52 covers the electrical connection portion 300C to suppress adhesion of the anticorrosive material, and a gap is generated on the aluminum wire 200 side so that the emitted liquid does not flow from the aluminum wire 200 side to the electrical connection portion 300C side. So that it is in close contact with the terminal fitting 300. Moreover, the terminal holding part 52 has the electrode part 521 which contacts and electrically connects each front-end | tip part of the electrical connection part 300C in the some terminal metal fitting 300. FIG. When the electrode part 521 is charged with a positive charge, the conductor part 200A and the terminal fitting 300 are also charged with a positive charge, and the terminal-attached electric wire 100 has a positive charge in the covering region A. Charges up. The terminal holding part 52 is configured to be turned over by rotating 180 degrees with the Y direction as an axial direction while holding the terminal fitting 300.

  The film thickness measuring means 6 includes an irradiation unit that irradiates light on the covering region A of the terminal-attached electric wire 100 and a light receiving unit that detects light reflected in the covering region A, and optically has a film thickness. Is configured to measure. The film thickness measuring means 6 is provided adjacent to the nozzle 21 and its relative position to the nozzle 21 is fixed.

  Here, a method of measuring the film thickness by the film thickness measuring means 6 will be described with reference to FIG. In a state where the outgoing liquid adheres to the surface of the covering region A of the terminal-attached electric wire 100 and the outgoing liquid film LF is formed, when the irradiation part of the film thickness measuring means 6 emits light, As shown by the two-dot chain line, it is reflected on the surface S1 of the outgoing liquid film LF, and the remainder is absorbed by the outgoing liquid film LF while passing through the outgoing liquid film LF and covered with the outgoing liquid film LF as shown by the one-dot chain line. Reflected at the interface S2 with the region A. The difference in the distance of the path through which these two types of light travel from the irradiation unit to the light receiving unit is substantially equal to twice the film thickness d of the emission liquid film LF. Here, a value obtained by multiplying the film thickness d by the refractive index n of the emission liquid film LF (relative refractive index where the refractive index of air is 1) is defined as an optical film thickness nd. When the integral multiple of the wavelength of the light irradiated by the irradiation section is equal to twice the optical film thickness nd, the two kinds of reflected light are most strengthened at the light receiving section, and a half wavelength is added to the integral multiple of the wavelength of the irradiation light. When the measured value is equal to twice the optical film thickness nd, the two types of reflected light are most weakened in the light receiving part. Therefore, the film thickness d of the emission liquid film LF can be calculated by irradiating light with a wavelength in a predetermined range and measuring the intensity at each wavelength of the light detected by the light receiving unit.

  Hereinafter, the method of emitting the emitted liquid toward the terminal-attached electric wire 100 using the coating apparatus 1 and covering the terminal-attached electric wire 100 with the anticorrosive material will be described.

  First, the operator causes the holding means 5 to hold the plurality of terminal-attached electric wires 100 and activates the coating apparatus 1. The control means controls the moving means to adjust the position of the nozzle 21. That is, the Y direction position of the nozzle 21 is matched with the first crimped portion 300A of the terminal fitting 300, and the X direction position is matched with the terminal-equipped electric wire 100 arranged on one side (left side in FIG. 1). Adjust the distance from 100 in the Z direction. Next, the control means starts application of voltage to the DC power supply 31, and then causes the spray gun 2 to start emitting the emitted liquid, and moves the nozzle 21 to the other side in the X direction as shown by a two-dot chain line in FIG. (Right side in FIG. 1). That is, the nozzle 21 is moved in the X direction while the nozzle 21 emits the emission liquid. At this time, the film thickness measuring means 6 is located on one side in the X direction with respect to the nozzle 21 and moves following the nozzle 21, so that the emitted liquid is already in the covering region A of the terminal-attached electric wire 100. The film thickness of the emitted liquid film LF is measured for the emitted region. If the quality of the emitted liquid is not stable at the start of the emission, the emitted liquid may be emitted in advance at a position where the emitted liquid does not reach the terminal-attached electric wire 100.

  When the nozzle 21 moves to a position facing the other terminal-side electric wire 100 in the X direction, the control unit temporarily stops emission of the emission liquid, moves the nozzle 21 along the Y direction, and then resumes emission. At the same time, the nozzle 21 is moved toward one side in the X direction. At this time, the film thickness measuring means 6 is caused to follow the nozzle 21 as in the case of moving to the other side. The number of times the nozzle 21 is moved in the X direction may be set as appropriate according to the coating thickness of the anticorrosive material, the emission amount of the emission liquid, and the like. Further, the nozzle 21 may be moved in the Y direction according to the width of the covering area A of the terminal-attached electric wire 100. When the covering area A is narrow, the nozzle 21 may not be moved in the Y direction.

  When the movement and the emission of the nozzle 21 are completed, the control means calculates the amount of emission liquid adhering based on the film thickness d of the emission liquid film LF measured by the film thickness measurement means 6, and adheres to each part of the coating region A. It is determined whether the amount is more than the required amount. Here, the required amount of adhesion is the amount of adhesion necessary for the emission liquid to dry and the anticorrosive film to be formed on the entire surface of the coating region A (the surface of the coating region A is not exposed). Suppose that it is determined by conducting an experiment in advance. When there is a portion where the amount of the ejected liquid attached is less than the required amount, the control means moves the nozzle 21 to the portion where the attached amount is insufficient by the moving means 4 to eject the emitted liquid again, and the film thickness measuring means. 6 to measure the film thickness again. The control means repeatedly executes the above operation until a sufficient amount of adhesion is obtained in the entire covering region A of the plurality of terminal-attached electric wires 100. Note that when the nozzle 21 is moved while emitting the emission liquid, the control unit may return the nozzle 21 to the corresponding portion and emit the emission liquid when the lack of the adhesion amount is detected.

  When there is no shortage of the adhesion amount and the emission of the emission liquid is completed, the operator temporarily stops the coating apparatus 1 and turns the terminal holding portion 52 over. Next, the operator restarts the coating apparatus 1, and in the same manner as before the terminal holding portion 52 is turned over, the nozzle 21 is moved and the emission liquid is emitted and the film thickness is measured. The nozzle 21 is moved to emit the emitted liquid again. In addition, when the emitted liquid circulates to the opposite side of the nozzle 21 in the terminal-attached electric wire 100 and the coating thickness of the anticorrosion material can be sufficiently secured on the opposite side, the holding means 5 does not need to be turned over. Further, the number of movements of the nozzle 21 in the X direction may be different before and after the holding means is turned over.

  When the emission of the emitted liquid is completed, the operator stops the coating apparatus 1 and dries the emitted liquid adhering to the terminal-attached electric wire 100. At this time, it may be dried by heating using a heater or the like, or may be naturally dried. When the emitted liquid is dried, a coating layer made of an anticorrosive material is formed on the surface of the terminal-attached electric wire 100.

  Here, the electrical interaction between the emitted liquid and the metal surface in the covering region A of the terminal-attached electric wire 100 will be described. First, since the nozzle 21 is positively charged, the emitted liquid is also positively charged. Therefore, as shown in FIG. 4A, the emitted liquid L is attracted to the coating region A that is negatively charged by the Coulomb force F1.

  As shown in FIG. 4 (B), when the emission liquid L adheres to the metal surface, the positive charge that the emission liquid L had moved to the metal side, and further, the metal surface was negatively charged. The outgoing liquid film LF is also negatively charged. At this time, the entire metal is substantially equipotential, whereas the emission liquid L has a relatively high resistance value, so the entire emission liquid film LF is not equipotential, and the nozzle 21 side of the emission liquid film LF is not. The surface potential V1 has a smaller absolute value than the potential V2 of the portion of the metal surface where the emission liquid L is not attached.

  Accordingly, when the emission liquid L is further emitted in a state where the emission liquid film LF is formed on a part of the metal surface as shown in FIG. 4B, the emission liquid L is easily attracted to the exposed metal surface. That is, the Coulomb force F2 facing the exposed metal surface works. When the emission of the emission liquid L is continued in this way, the emission liquid film LF is formed so as to cover the entire metal surface as shown in FIG.

  According to this embodiment, there are the following effects. That is, by irradiating light and measuring the film thickness of the outgoing liquid film LF based on the reflected light, the amount of the outgoing liquid attached to the conductor can be measured in the liquid state. Before the emission liquid is dried by measuring the adhesion quantity of the emission liquid and knowing in advance the adhesion quantity of the emission liquid necessary for the formation of the anticorrosive film on the entire surface of the coating region A In addition, it is possible to predict whether or not a coating film is formed on the entire surface of the coating region A.

  Further, the nozzle 21 is moved along the X direction, which is the direction in which the terminal-attached electric wires 100 are arranged, while the nozzle 21 emits the emission liquid, thereby preventing the covering region A of the plurality of terminal-attached electric wires 100 with a simple configuration. It can be covered with foodstuffs. At this time, the charged emission liquid is easily diffused and is attracted to the coating area A. Therefore, when the emission liquid is emitted, the nozzle 21 moves in the Y direction or the Z direction according to the shape of the coating area A and the like. Even if it does not control, it can coat | cover with an anticorrosion material so that the coating area | region A may not be exposed. Further, by causing the film thickness measuring means 6 to follow the nozzle 21, the film thickness of the outgoing liquid film LF can be measured immediately after the outgoing liquid is emitted.

  Furthermore, by moving the nozzle 21 to a portion where the amount of the emitted liquid attached is insufficient and emitting the emitted liquid again, a coating material film can be formed on the entire surface of the conductor portion.

  Further, the voltage application means 3 applies a voltage so that the nozzle 21 and the covering region A of the terminal-attached electric wire 100 are charged with different polarities, and emits the emitted liquid, thereby emitting the entire covering region A. The liquid film LF can be formed, and a coating layer made of an anticorrosive material can be formed on the surface of the terminal-attached electric wire 100.

  Furthermore, corrosion of the covering region A can be suppressed by covering the covering region A of the terminal-attached electric wire 100 with the anticorrosive material as the covering material. Moreover, the anticorrosive material also has waterproofness, and can prevent water from entering the surfaces of the conductor part 200 </ b> A and the terminal fitting 300 in the covering region A.

  In addition, this invention is not limited to the said embodiment, Including other structures etc. which can achieve the objective of this invention, the deformation | transformation etc. which are shown below are also contained in this invention.

  For example, in the above embodiment, the moving means 4 moves the nozzle 21, but the nozzle 21 and the terminal-attached electric wire 100 may be relatively moved by providing a moving means for moving the holding means 5.

  In the above embodiment, the relative position between the film thickness measuring unit 6 and the nozzle 21 is fixed, and the moving unit 4 moves the film thickness measuring unit 6 together with the nozzle 21. It may be configured to move independently of the nozzle 21 or may be fixed at a fixed position. For example, the film thickness measuring means 6 may be installed so as to measure the film thickness at a position where it is known in advance that the amount of adhesion tends to be insufficient in the emission liquid film LF.

  In the embodiment, the anticorrosion material is exemplified as the covering material. However, the covering material may be, for example, for forming an insulating layer on the exposed portion of the metal, or the metal surface is damaged. It may be a coating material for suppressing the above, and any suitable material that covers at least the conductor portion 200A of the terminal-attached electric wire 100 may be used. The emitting liquid may be formed by dissolving or dispersing a coating material in an appropriate liquid, or may be configured by a liquid coating material, and cured by, for example, irradiation with ultraviolet rays or X-rays or heating. There may be.

  Moreover, in the said embodiment, although the conductor part 200A shall cover the anticorrosion material for the electric wire 100 with a terminal which has the aluminum electric wire comprised with aluminum or aluminum alloy, the material of the conductor part of an electric wire is limited to aluminum. For example, an appropriate metal such as copper or an alloy in which an appropriate metal is combined may be used.

  In addition, the best configuration, method and the like for carrying out the present invention have been disclosed in the above description, but the present invention is not limited to this. That is, the invention has been illustrated and described primarily with respect to particular embodiments, but may be configured for the above-described embodiments without departing from the scope and spirit of the invention. Various modifications can be made by those skilled in the art in terms of materials, quantity, and other detailed configurations. Therefore, the description limiting the shape, material, etc. disclosed above is an example for easy understanding of the present invention, and does not limit the present invention. The description by the name of the member which remove | excluded the limitation of one part or all of such is included in this invention.

1 Coating device 2 Spray gun (outgoing means)
3 Voltage applying means 4 Moving means 5 Holding means 6 Film thickness measuring means 21 Nozzle (emission part)
A Covering area (metal member)
L Output liquid (liquid)
LF Outgoing liquid film 200 Aluminum electric wire (electric wire)
200A conductor

Claims (7)

A coating apparatus for coating an exposed conductor portion of an electric wire with a coating material,
Holding means for holding the electric wire;
Emitting means for emitting the liquid containing the covering material from the emitting portion;
Moving means for relatively moving the emitting portion and the holding means;
A film thickness measuring means for optically measuring the film thickness of the liquid film formed on the conductor portion;
The film thickness measuring means is applied to the area of the conductor portion where the liquid is emitted after the emitting means and the holding means are relatively moved by the moving means while emitting the liquid to the emitting portion. And a control unit that measures the film thickness.   The coating apparatus according to claim 1, wherein the electric wire is an aluminum electric wire. The holding means holds a plurality of the electric wires side by side,
The moving means is configured to be relatively movable along the parallel arrangement direction of the plurality of electric wires with the emitting portion and the holding means,
The film thickness measuring means is fixed at a relative position to the emitting part,
The control unit causes the emitting unit to move relative to the holding unit along the juxtaposed direction so that the film thickness measuring unit follows the emitting unit while emitting the liquid to the emitting unit. The coating apparatus according to claim 1, wherein the film thickness measuring unit measures the film thickness.   The control unit causes the moving unit to move the emitting unit and the holding unit relative to each other based on the film thickness measured by the film thickness measuring unit, and causes the emitting unit to emit the liquid again. The coating apparatus according to any one of claims 1 to 3. A voltage applying means for applying a voltage to the emitting portion and the conductor portion;
The coating apparatus according to claim 1, wherein the emitting portion is made of metal.   The coating apparatus according to claim 1, wherein the coating material is an anticorrosion material. A covering method for covering an exposed conductor portion of an electric wire with a covering material,
After the liquid containing the covering material is emitted from the emission part and the emission part and the electric wire are relatively moved, the film formed of the liquid for the region where the liquid is emitted in the conductor part. A coating method characterized by optically measuring a film thickness.

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