JPH0787057B2 - Method and apparatus for manufacturing coated electric wire - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for manufacturing a coated electric wire, and more particularly to a method and an apparatus for manufacturing a coated electric wire with high outer diameter accuracy.

[Conventional Technique] A conventional technique for manufacturing a coated electric wire will be described with reference to FIG. 7.

In the conventional apparatus 51 for manufacturing a coated electric wire shown in FIG. 7, the conductor wire ω is supplied from the line feeder 2 and is applied with the paint P by coming into contact with the coating roller 52 which is half-soaked in the paint P. The paint can be baked in the machine 8. The coated electric wire W on which the paint has been baked is wound by the winder 9.

The outer diameter of the coated electric wire W is measured by the outer diameter measuring device 53 and fed back to the coating roller 52 via the controller 54.

That is, the controller 54 compares the measured value of the outer diameter of the coated wire W with the target value, and according to the deviation, the coating roller 52
Is controlled so that the outer diameter of the coated electric wire W becomes constant.

An apparatus 51 for manufacturing a coated electric wire as described above is disclosed in, for example, Japanese Patent Publication No. 54-5.
It is disclosed in Japanese Patent Publication No. 09 and Japanese Patent Laid-Open No. 63-236221.

In addition, there is also known a technique for controlling the outer diameter of the coated wire to a constant value by adding a diluting solution into the coating material according to the deviation between the measured value of the outer diameter of the coated wire and the target value and adjusting the concentration of the coating material. .

This is disclosed, for example, in Japanese Examined Patent Publication No. 37-7769.

[Problems to be Solved by the Invention] Among the conventional techniques described above, in the method of controlling the rotation amount of the coating roller 52, the variation of the state in which the coating roller 52 is immersed in the coating material P and the coating roller 52 Control becomes unstable due to factors such as wear, and there is a problem that the dimensional accuracy of the outer diameter of the coated electric wire cannot be made sufficiently high.

Further, in the method of adjusting the concentration of the coating material, the control becomes unstable due to factors such as the control time delay and the dimensional accuracy of the outer diameter of the coated electric wire cannot be increased.

Therefore, an object of the present invention is to improve the stability of control,
An object of the present invention is to provide a method and an apparatus for manufacturing a coated electric wire, which can sufficiently increase the dimensional accuracy of the outer diameter of the coated electric wire.

[Means for Solving the Problem] The method for producing a coated electric wire according to the present invention is the method for producing a coated electric wire according to the present invention, in which a coating is applied to the surface of a conductor wire while the conductor wire is running and baking is performed. , There is a small chamber through which the conductor wire passes, and the introduction side of the conductor wire into the small chamber is a lip portion having an opening sufficiently larger than the diameter of the conductor wire, and the lead-out side of the conductor wire from the small chamber is a conductor. A die having a nozzle portion having a small hole slightly larger than the diameter of the wire, and further provided with a solvent injection hole for injecting a solvent into the small chamber and an exhaust pressure hole for releasing the pressure in the small chamber to the outside. Is interposed between the coating part and the baking part, the conductor wire is run in the die, and the paint applied to the conductor wire is diluted with the solvent while the conductor wire passes through the die and Equalize the thickness with the holes and measure the wire diameter after baking. The characteristic feature of the construction is to compare the measured wire diameter value with the preset target value and control the injection amount of the solvent injected from the solvent injection hole of the die so as to reduce the deviation.

Further, the coated electric wire manufacturing apparatus of the present invention comprises a coating means for coating the surface of the conductor wire, a baking means for baking the paint, and a conductor wire running for running the conductor wire from the coating means to the baking means. In the manufacturing apparatus of the coated electric wire having means, there is a small chamber interposed between the coating means and the baking means, through which the conductor wire passes, and the introduction side of the conductor wire into the small chamber is sufficiently larger than the diameter of the conductor wire. It is a lip part with an opening, and a nozzle part with a small hole slightly larger than the diameter of the conductor wire on the lead-out side of the conductor wire from the small chamber, and solvent injection to inject solvent into the small chamber. Die means having a hole and an exhaust pressure hole for releasing the pressure in the small chamber to the outside, a solvent injecting means for injecting a solvent from the solvent injecting hole into the small chamber, and a coated electric wire installed after the baking means. Wire diameter measurement to measure the wire diameter of And a control means for controlling the solvent injection amount of the solvent injection means so as to reduce the deviation by comparing the measured wire diameter value with a preset target value. Is.

Further, in the coated electric wire manufacturing apparatus of the present invention, in the above structure, the wire diameter measuring means alternately measures the wire diameter of the coated electric wire and the standard wire at every predetermined time, and at the same time, the control means. Is based on the change in the measured diameter of the standard wire,
The constitutional feature is that the measured wire diameter value or target value of the coated electric wire is corrected.

[Operation] The coating material applied to the conductor wire by the coating means is leveled by a die and diluted with a solvent before being baked by the baking means.

If the measured outer diameter of the coated wire after baking is greater than the target value, increase the solvent injection amount and increase the paint dilution. This reduces the outer diameter of the coated wire.

On the other hand, when the measured outer diameter of the coated electric wire is smaller than the target value, the amount of solvent injected is reduced and the degree of dilution of the coating is reduced.
This increases the outer diameter of the coated wire.

So, after all, the outer diameter of the coated wire will converge to the target value.

In this method, there are no variable factors such as the immersion state of the coating roller and wear, and there is no time delay factor because the internal volume of the die is small.

Therefore, the control is stably performed, and the dimensional accuracy of the outer diameter of the coated electric wire can be sufficiently increased.

In addition, the diameter of the standard wire is measured every predetermined time, and the measured diameter or target value of the coated wire is corrected according to the fluctuation of the measured value, so that the error due to the fluctuation of ambient temperature etc. does not occur. It is possible to prevent it and improve the accuracy.

[Embodiment] The present invention will be described in more detail based on the embodiment shown in the drawings. The present invention is not limited to this.

In an apparatus 1 for manufacturing a coated electric wire according to an embodiment of the present invention shown in FIG. 1, a copper wire ω is supplied from a wire feeder 2 and contacts a surface of a coating roller 3 whose lower portion is dipped in a polyurethane paint P. As a result, the paint P is applied.

The copper wire ω coated with the paint P then passes through the inside of the die 4, and the die 4 has a lip portion 4a as shown in FIG.
And a nozzle portion 4b, a solvent injection hole 5 is provided near the lip portion 4a, and a pressure exhaust hole 6 is provided near the nozzle portion 4b. Therefore, when the copper wire ω passes through the die 4, the coating material P is leveled to a thickness corresponding to the diameter of the nozzle portion 4b, and the excess amount is removed from the lip portion 4a. Further, since the solvent L in which cresol and xylene are mixed is injected from the solvent injection hole 5, the paint P is diluted inside the die 4. The dilution degree is defined by the injection amount of the solvent L. The pressure exhaust hole 6 is for keeping the pressure inside the die 4 constant.

After leaving the die 4, the paint P is baked by the baking machine 8. At that time, the solvent evaporates, so that the thickness of the paint layer is defined according to the degree of dilution in the die 4.

The baked coated electric wire W is wound by the winder 9 while the outer diameter is measured by the laser outer diameter measuring device 10.

As shown in FIG. 3, the laser outer diameter measuring device 10 is mounted on a slider 13, and the slider 13 is fitted on a rail 14 and slid by the rotation of a linear head motor 15. . Therefore, the laser outer diameter measuring device 10 measures the outer diameter of the coated electric wire W at the position of the slider 13 shown in FIG. 3, but the laser outer diameter measuring device 10 is stretched in parallel with the coated electric wire W at the slid position. The outer diameter of the standard line H thus measured is measured.

The measured value of the outer diameter of the coated electric wire W is input to the outer diameter display 11 and the controller 12.

The outer diameter display 11 displays the measured outer diameter value up to a digit of 0.1 μm.

The controller 12 controls the metering pump 7 based on the measured value of the outer diameter, and controls the injection amount of the solvent L into the die 4. Further, the linear head motor 15 is periodically driven to switch between the measurement of the outer diameter of the coated wire W and the measurement of the outer diameter of the standard wire H.

Next, with reference to the block diagram of FIG. 4 and the flow chart of FIG. 5, the operation of the coated wire manufacturing apparatus 1 will be described in detail.

First, the operator inputs the target outer diameter value and the management classification value to the controller 12 via an input device (not shown).

The arithmetic control unit 16 of the controller 12 stores the target outer diameter value and the management classification value in the memory 17 (S1).

The arithmetic control unit 16 determines whether to measure the standard wire H or the painted wire W based on the signal from the timer 19 (S2, S5).

First, the standard line H is measured, and the linear head motor 15 is driven to measure the outer diameter of the standard line H (S3).

Then, the measured outer diameter value of the standard line H is compared with the target outer diameter value, and the correction amount is calculated from these errors (S4). The reason for this error is due to temperature drift of the laser outer diameter measuring device 10 or the like.

Next, the coated electric wire W is measured. That is, the linear head motor 15 is driven to return the laser outer diameter measuring device 10 to its original position, and the outer diameter of the coated electric wire W is measured (S6).

Then, the measured value of the outer diameter of the coated electric wire W is corrected based on the correction amount (S7).

Next, the arithmetic and control unit 16 compares the corrected measured value of the outer diameter of the coated electric wire W with the management classification value to determine whether it is the first management classification, the second management classification, or other (S8, S9).

Usually, the first management category is set within the range of the target outer diameter value ± 0.5 to 1.0 μm. In addition, the second management classification is the outer diameter set value ±
It is set in the range of 1.5 to 2.0 μm (excluding the range of the first management category).

If the corrected measured value of the outer diameter of the coated electric wire W is within the range of the first control category, the required outer diameter dimension system is obtained, so the rotation speed of the metering pump 7 is maintained at the current state.
The current injection amount of the solvent L is maintained (S10).

If it is within the range of the second control section, the rotation speed of the metering pump 7 is increased or decreased by a predetermined amount and the injection amount of the solvent is increased or decreased via the output conversion unit 18. Then, the rotation speed is maintained for the holding time of the time required for the coated electric wire W to move from the position of the die 4 to the position of the laser outer diameter measuring device 10 (S11).

Further, when it is not within the range of the second management division, the rotation speed of the metering pump 7 is increased or decreased by a predetermined amount or more through the output conversion unit 18, and in this case, the holding time as described above is set. Not provided (S12).

After step S10, S11 or S12, the process returns to step S2.

By repeating the above operation, the outer diameter of the coated electric wire W is maintained within the range of the first management section.

As can be understood from the above description, according to the coated electric wire manufacturing apparatus 1, the dimensional accuracy of the outer diameter of the coated electric wire W can be increased.

Further, since the injection amount of the solvent L into the die 4 is controlled in accordance with the deviation stage, the control is prevented from becoming oscillating, and the control is promptly converged within the required outer diameter range. .

Furthermore, since the outer diameter of the standard wire H is measured every predetermined time and the measured value of the outer diameter of the coated wire W is corrected based on this, it is possible to prevent an error from occurring due to environmental fluctuation.

Another example is a vertical type coated electric wire manufacturing apparatus 21 shown in FIG. 6, the same components as those of the coating apparatus 1 shown in FIG. 1 are designated by the same reference numerals. Reference numeral 22 is a paint tank, and 23 is a paint supply pump.

Still another embodiment is one in which a plurality of dice 4 are provided in series.

[Effects of the Invention] According to the method and apparatus for manufacturing a coated electric wire of the present invention, the amount of paint applied to the conductor wire can be controlled stably and without a time delay, so that a coated electric wire with a high dimensional accuracy of the outer diameter can be obtained. You will be able to.

Also, it is possible to prevent the occurrence of errors due to changes in ambient temperature,
In this respect as well, it becomes possible to obtain a coated electric wire having a high dimensional accuracy of the outer diameter.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of a coated electric wire manufacturing apparatus according to an embodiment of the present invention, FIG. 2 (a) is a perspective view of a die, and FIG. 2 (b) is an end view of the die. 3, FIG. 3 is a perspective view of the laser outer diameter measuring instrument, FIG. 4 is a block diagram of a control system of the apparatus shown in FIG. 1, FIG. 5 is a flowchart of the main part of the operation of the apparatus shown in FIG. FIG. 7 is a block diagram of a coated electric wire manufacturing apparatus according to another embodiment of the present invention, and FIG. 7 is a block diagram of a conventional painted electric wire manufacturing apparatus. (Explanation of symbols) 1,21 …… Coating wire manufacturing device 3 …… Coating roller 4 …… Die 5 …… Solvent injection hole 6 …… Exhaust pressure hole 7 …… Metering pump 8 …… Baking machine 9… … Winder 10 …… Laser outer diameter measuring instrument 11 …… Outer diameter indicator 12 …… Controller 15 …… Linear head motor ω …… Conductor wire W …… Painted wire H …… Standard wire P …… Paint L… …solvent.

Claims (3)

[Claims] 1. A method of manufacturing a coated electric wire, wherein a conductor wire is coated with a paint and baked on the surface while the conductor wire is running. The conductor wire has a small chamber through which the conductor wire is introduced. Is a lip portion having an opening that is sufficiently larger than the diameter of the conductor wire, and the lead-out side of the conductor wire from the small chamber is a nozzle portion having a small hole slightly larger than the diameter of the conductor wire. A solvent injection hole for injecting, and a die provided with an exhaust pressure hole for allowing the pressure in the small chamber to escape to the outside are provided between the coating section and the baking section, and the conductor wire is run in the die, The paint applied to the conductor wire is diluted with the solvent while the conductor wire is passing through the die, and the thickness is leveled with the small holes, and the wire diameter after baking is measured. Compare the set value with the set value to reduce the deviation. Method for manufacturing a coated wire, characterized in that to control the injection amount of the solvent to be injected from the solvent injection hole. 2. A coated electric wire comprising: a coating means for coating the surface of the conductor wire; a baking means for baking the coating material; and a conductor wire running means for running the conductor wire from the coating means to the baking means. In the manufacturing apparatus, there is a small chamber which is interposed between the coating means and the baking means and through which the conductor wire passes, and the introduction side of the conductor wire into the small chamber is a lip portion having an opening sufficiently larger than the diameter of the conductor wire. The outlet side of the conductor wire from the small chamber is a nozzle portion having a small hole slightly larger than the diameter of the conductor wire, and a solvent injection hole for injecting a solvent into the small chamber, and the inside of the small chamber. Die means provided with a discharge pressure hole for releasing pressure to the outside, solvent injection means for injecting a solvent from the solvent injection hole into the small chamber, and a wire diameter of a coated electric wire installed after the baking means are measured. Wire diameter measuring means and measured wire diameter values And a control unit for controlling the solvent injection amount of the solvent injection unit so as to reduce the deviation by comparing the predetermined target value with a preset target value. 3. The wire diameter measuring means alternately measures the wire diameter of the coated electric wire and the wire diameter of the standard wire at predetermined time intervals, and the control means controls the wire diameter value of the measured standard wire. The coated wire manufacturing apparatus according to claim 2, wherein the measured wire diameter value or target value of the coated wire is corrected based on the change.