JPH0765655A - Varnish applying apparatus - Google Patents

Abstract

PURPOSE:To provide a varnish applying apparatus by which the quality of a finally manufactured enameled wire can be stabilized and at the same time which does not need to stop the varnish applying work during maintenance or repair work as a conuntermeasure against deterioration and wear of varnish- coated parts or a varnish liquid level detector. CONSTITUTION:A coating roll 12 as a varnish applying part is installed inside a varnish bath 11 in such a way as a part of the roll is dipped in the varnish 12 and the roll rotates freely. Meanwhile, a load cell type load meter 14 which converts a load into an electric signal is installed on the bottom part of the varnish bath 11 as a liquid level detector to detect the liquid surface level of the varnish 12 inside the varnish bath 11. The load meter 14 is electrically connected to a control displaying part 8, so that any output signal can be transmitted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a varnish coating apparatus for coating a core wire such as a copper wire with a varnish to manufacture an enamel electric wire.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 4, a core wire 41 such as a copper wire is supplied from a core wire supply device 43, annealed by an annealer 44, and then coated with a varnish 12 on the surface of the core wire 41. The varnish 12 is sent to the varnish applying device 50, and the surface is coated with the varnish 12, and then sent to the horizontal baking machine 46, where the varnish 12 is baked and cured. Then, the core wire 41 makes a U-turn through the guide roll 49, and the varnish coating device 50
Then, the varnish 12 is applied again to the surface of the core wire 41 and is baked, and the varnish 12 is applied to the surface of the core wire 41 and the baking process is repeated several times. , The take-up machine 47, and the take-up machine 4
Winding is done at 8.

As shown in FIG. 5, a coating roll 13 is rotatably mounted inside the varnish bath 11 of the varnish coating apparatus 50 so that a part of the coating roll 13 is immersed in the varnish 12. The coating roll 13 is rotated by a motor (not shown) to scrape up the varnish 12 and apply the varnish 12 to the core wire 41 contacting the outer peripheral surface of the coating roll 13.
Apply.

Further, the rotation speed of the coating roll 13 is kept constant, and as described above, the varnish 12 is constantly overflowed from the varnish bath 11 to keep the liquid level of the varnish 12 in the varnish bath 11 constant. A constant amount of varnish is applied to the line 41.

Further, when the liquid level of the varnish 12 falls below a prescribed level due to an increase in varnish consumption or an unexpected failure, an alarm device for detecting the liquid level by the liquid level detector 51 (Fig. The varnish coating device 50 is not shown.
Is equipped with.

As shown in FIG. 5, the liquid level detector 51 detects the position of the float 51a floated in the varnish 12 liquid in the varnish bath 11 due to ups and downs, and when the liquid level of the varnish 12 falls below a prescribed level. , Which transmits an electric signal to an alarm device (not shown) to issue an alarm, and supports the float 51a, the float shaft 51b attached to the upper part of the float 51a, and the float shaft 51b so as to be movable in the vertical direction. Bracket 51c attached to the upper side wall of the varnish bath 11 for the purpose of having a float shaft through hole 51d.
And is attached to the bracket 51c, and the float shaft 51
It is composed of a proximity switch 51f which operates by being sensitive to the metal piece 51e provided on the upper side surface of b and outputs an electric signal. Reference numeral 16 is a replenishment pipe for supplying the varnish 12 which is insufficient in the varnish bath 11.

[0007]

In the conventional liquid level detector for the varnish 12 liquid in the varnish bath 11 of the varnish coating apparatus 50, the inner surface of the float shaft through hole 51d shown in FIG. 51b comes into contact with the outside air and the varnish 12 liquid, so that dust or solidified varnish is likely to adhere thereto, so that the friction coefficient becomes large, and the operation of the float 51a does not follow the change of the liquid surface of the varnish 12 in the varnish bath 11. May become dull or may not operate at all, and the original function of detecting the liquid level of the varnish 12 may not be fulfilled. As a result, in the conventional varnish coating device 50, in order to maintain the accurate operation of the liquid level detector, the inner surface of the float shaft through hole 51d and the float shaft 51 are maintained.
It is necessary to regularly perform maintenance such as removing the varnish adhering to the surface of b.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and can stabilize the quality of an insulated wire to be finally manufactured, and at the same time, the inner surface of the float shaft through hole 51d and the surface of the float shaft 51b. (EN) Provided is a varnish coating device which does not require maintenance for removing varnish adhered to a varnish.

[0009]

According to the present invention, there is provided a varnish bath containing a varnish, a varnish applicator for applying varnish to a core wire, and a liquid level detector for detecting the liquid level of the varnish in the varnish bath. In the varnish coating apparatus provided with, the liquid level detector is characterized by comprising a load cell for detecting the liquid level of the varnish by measuring the weight of the varnish contained in the varnish bath. is there.

[0010]

According to the varnish coating apparatus of the present invention, by using the load meter as the liquid level detector, it is possible to detect the liquid level of the varnish without contacting the varnish liquid. Therefore, it is possible to detect the liquid surface level of the varnish which is stable and always stable. In addition, since there is no need to interrupt the varnish application work for maintenance or repair for the purpose of taking measures against deterioration and wear of the liquid level detector, the efficiency and stability of the varnish application work are significantly improved.

[0011]

The present invention will be described in detail below with reference to the drawings. 1, 2 and 3 are explanatory views showing an example of the varnish coating apparatus 10 of the present invention. Reference numeral 11 in the figure denotes a varnish bath 11 for storing a varnish 12 having a predetermined volume, for example, 1 liter.
Is. Inside the varnish bath 11, a coating roll 13 as a varnish coating part is rotatably attached so that a part of the coating roll 13 is immersed in the varnish 12. The coating roll 13 is rotated to drive the varnish 1
2 is scraped up, and the varnish 12 is applied to the core wire 41, which is a conductive wire such as a copper wire running in a lateral direction (rightward in the figure) in contact with the outer peripheral surface of the application roll 13. The varnish applying section includes a varnish squeezing tool (not shown) in addition to the applying roll 13. The varnish squeezing tool is provided on the rear side of the coating roll 13 and has the extra varnish 12 attached on the core wire.
Is squeezed with a diaphragm or a squeezing member such as a die.

As shown in FIG. 1, at the bottom of the varnish bath 11 is a load cell type load meter for converting the load into an electric signal as a liquid level detector for detecting the liquid level of the varnish 12 in the varnish bath 11. 14 are installed. The load meter 14 does not necessarily have to be at the bottom, and the load meter 14 may be provided at a position where the load of the varnish 12 liquid in the varnish bath 11 is applied, for example, at the side of the varnish bath 11 as shown in FIG.
May be installed. Further, the load meter 14 can accurately measure the load of the varnish bath 11 and the varnish 12 in the varnish bath 11 even if the load of the varnish bath 11 is biased, as shown in FIG. It is preferable that a plurality of them are arranged.

Each load meter 14 is electrically connected to the control display unit 18 so that an output signal is transmitted, and measures the weight of the varnish bath 11 and the varnish 12 accommodated in the varnish bath 11. Then, an output signal is sent to the control display unit 18. The control display unit 18 includes a load meter 14
The weight of the varnish 12 in the varnish bath 11 is calculated by subtracting the weight of the varnish bath 11 that has been measured and input in the empty state without varnish from the output signal received, and converted into the varnish liquid level. To do. This varnish liquid surface level is compared with the lower limit varnish liquid surface level, and when the display indicating the varnish 12 liquid surface and the load become lower than the lower limit stipulation, an indication of the liquid surface level of the varnish 12 and an alarm are issued. Also,
Similarly, the control display unit 18 receives the output signal of the load meter 14, and when the load becomes lower than the lower limit stipulation and when the load becomes higher than the upper limit stipulation, the control display unit 18 receives the output signal and replenishes. The varnish 12 may be newly replenished from the replenishment pipe 16 to the varnish bath 11 by opening / closing the opening / closing valve 17 of the pipe 16 with a solenoid, a motor or the like (not shown). In addition, 15 is a duct for collecting the varnish 12 overflowing from the varnish bath 11 through a discharge port 11 a into a storage tank (not shown), and 16 is a supply pipe for supplying the varnish 12 into the varnish bath 11.

[0014]

As described above, according to the varnish coating apparatus of the present invention, the level of the varnish is detected by measuring the weight of the varnish contained in the varnish bath with a load meter. The liquid level of the varnish in the apparatus can be detected in a non-contact manner with the varnish, and the liquid level detector can be constantly and accurately detected without deterioration and wear of the liquid level detector. Further, since there is no fear of interrupting the varnish application work for maintenance or repair for the purpose of preventing deterioration and wear of the liquid surface detector, the efficiency of the varnish application work is remarkably improved.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an example of a varnish coating apparatus of the present invention.

FIG. 2 is an explanatory view showing another example of the varnish coating apparatus of the present invention.

FIG. 3 is a plan view showing a varnish applying section in the varnish applying apparatus of the present invention.

FIG. 4 is an explanatory view showing a usage state of a conventional varnish coating device.

FIG. 5 is an explanatory view showing a conventional varnish coating device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Varnish coating device 11 ... Varnish bathtub 12 ... Varnish 13 ... Coating roll 14 ... Load meter 18 ... Control display part

Claims (1)

[Claims] 1. A varnish coating device comprising a varnish bath containing varnish, a varnish coating section for coating the core wire with varnish, and a liquid level detector for detecting the liquid level of the varnish in the varnish bath. The liquid level detector is composed of a load meter which is arranged at the bottom or side of the varnish bath and detects the liquid level of the varnish by measuring the weight of the varnish contained in the varnish bath. Varnishing device.