JPH0555414U - Enamel wire printing device - Google Patents

Abstract

(57) [Summary] [Purpose] It is possible to cope with speeding up of traveling enameled wires. [Structure] A cooling device 2 for cooling a traveling enameled wire 3 coming out of a baking furnace 1 is provided on an upper side of the traveling enameled wire 3, and an orifice 5 portion for ejecting high pressure air 4 to the traveling enameled wire 3 and a blowing device. The line runout prevention device 6 for preventing the running enameled wire 3 from wobbling, the direction guide plate 7 for guiding the flow of the air blown on the running enameled wire 3, the orifice 5 and the direction guide plate 7 are enclosed. It is characterized in that it is configured to have the exhaust hood 8 provided in. [Effect] The air passing through the orifice becomes a low-temperature high-speed air due to adiabatic expansion to cool the traveling enameled wire.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to an enameled wire printing apparatus.

[0002]

[Prior Art]

 The following is a typical cooling device for a conventional traveling enameled wire.

(1) The high temperature running line coming out of the baking oven is naturally cooled by room temperature air outside the baking oven.

(2) A room temperature air is blown to a high temperature running line coming out of the baking furnace by a fan or the like to cool it.

(3) Water is passed through the inside of a rotating roll or the like that comes into contact with the high-temperature running line coming out of the baking oven, and the roll itself is cooled by water to indirectly cool the roll.

[0006]

[Problems to be solved by the device]

 The above conventional technique has the following problems.

(1) In the case of natural cooling with room temperature air outside the baking oven, the cooling effect decreases as the traveling line itself becomes faster and as the size increases. As a result, the varnish is re-applied while the running line is at a high temperature, and the temperature rise of the applied varnish causes the applied varnish to become uneven (eccentricity, eccentricity), resulting in remarkable insulation performance of the enamel wire. Cause decline.

In addition, the temperature of the varnish circulating between the varnish tank and the varnish coating section also rises, and the varnish coating thickness increases due to a decrease in the viscosity of the varnish and an increase in the nonvolatile content of the varnish due to the evaporation of solvent in the varnish. Cause the fluctuation of.

(2) Although cooling by air blowing at room temperature and indirect cooling by a water-cooled roll are more effective than the above natural cooling, since room temperature air and room temperature water are used, the speed of the enameled wire is greatly increased. On the other hand, it has the same problem as the above-mentioned natural cooling.

As described above, for the natural cooling of the enameled wire, high cooling of the running line has been a major issue.

The present invention has been made in view of the above points, and an object of the present invention is to provide an enameled wire printing apparatus capable of coping with speeding up of a traveling enameled wire.

[0012]

[Means for Solving the Problems]

 The purpose of the above is to install a cooling device for cooling the traveling enameled wire coming out of the baking furnace on the upper side of the traveling enameled wire and to the orifice part and the orifice part for blowing out high pressure air to the traveling enameled wire. A line runout prevention device that is provided below the traveling enameled wire to prevent runout of the traveling enameled wire, and a direction guide plate that is provided below the line runout prevention device and covers the lower side of the traveled enameled wire. It is achieved by having an orifice portion and an exhaust hood provided around the direction guide plate on the upper side of the traveling enamel wire.

[0013]

[Action]

 Since the above means is provided, the air passing through the orifice portion becomes a low temperature and high speed air by adiabatic expansion to cool the traveling enameled wire.

[0014]

【Example】

 Next, the present invention will be specifically described with reference to examples.

[Embodiment 1] FIG. 1 shows an embodiment of the present invention. An enameled wire baking apparatus equipped with a baking furnace 1 and a cooling device 2 for repeatedly performing baking and cooling. In this embodiment, a cooling device 2 for cooling a traveling enameled wire 3 coming out of the baking furnace 1 is used as a traveling enameled wire. 3 is provided on the upper side of the traveling enameled wire 3 and blows out the high-pressure air 4 to the traveling enameled wire 3, and at the lower part of the traveling enameled wire 3 facing the orifice 5 portion, the deflection of the traveling enameled wire 3 is prevented. An anti-vibration device 6 for preventing and a direction guide plate which is provided on the lower side of the anti-vibration device 6 so as to cover the lower side of the running enamel wire 3 and whose both ends are directed to the running enamel 3 side. 7 and an exhaust hood 8 provided on the upper side of the traveling enameled wire 3 so as to surround the orifice 5 and the direction guide plate 7. By doing so, the air passing through the orifice 5 becomes a low-temperature high-speed air 9 due to adiabatic expansion to cool the traveling enameled wire 3, and the traveling enameled wire 3 can be cooled at a high speed. It is possible to obtain an enameled wire printing apparatus capable of coping with the speedup of the enameled wire 3.

That is, the traveling enameled wire 3 is coated with a varnish by the applicator 10 and then baked in the baking furnace 1 to form an insulating film. The traveling enameled wire 3 is inverted by the guide pulley 11, repeatedly passed through the applicator 10 and the baking furnace 1 a plurality of times to form a predetermined film thickness, and is wound. Normally, the temperature inside the baking furnace 1 is set to 400 to 600 ° C., and the surface temperature of the traveling enameled wire 3 exiting from the baking furnace 1 is about 180 to 300 ° C., but the cooling device 2 of this embodiment is used. Then, the surface temperature of the traveling enameled wire 3 is lowered to 80 ° C or lower.

That is, as shown in the same drawing (b) of the cooling device 2, when the high pressure air 4 compressed by the compressor passes through the orifice 5, it becomes a low temperature high speed air 9 due to adiabatic expansion. Directly sprayed onto the traveling enameled wire 3 to perform primary cooling. After that, the low-temperature high-speed air 9 is turbulently branched in two directions by the direction guide plate 7, secondary cooling is carried out between the low-temperature high-speed air 9 and the traveling enameled wire 3, and is guided to the exhaust hood 8 and discharged.

Since the orifice 5 at the outlet of the high-pressure air 4 is installed long in the width direction of the baking furnace 1, the traveling enameled wire 3 in the entire baking furnace 1 can be cooled.

The temperature of the low-temperature high-speed air 9 can be adjusted by adjusting the pressurizing pressure of the high-pressure air 4 and the opening width of the orifice 5.

In order to prevent line runout of the traveling enameled wire 3 due to blowing of the low-temperature high-speed air 9, line run-out prevention devices 6 are attached inside and outside the cooling device 2 at a plurality of places.

As described above, according to the present embodiment, it is possible to cool a high-speed running enameled wire which cannot be achieved by the conventional cooling device, and the following effects can be obtained.

(1) By significantly enhancing the cooling effect of the traveling enameled wire, the high temperature and high speed baking work of the enameled wire becomes possible.

(2) By significantly improving the cooling effect of the traveling enameled wire, it is possible to reduce the rotational wear of the guide pulley, the guide roll and the like, and reduce the maintenance by extending the life of the ball bearing and the like.

(3) Insulation characteristics are improved by reducing contact scratches with a guide or the like due to a decrease in the surface temperature of the traveling enameled wire.

[0025]

[Effect of the device]

 As described above, in the present invention, the cooling device for cooling the traveling enameled wire coming out of the baking furnace is provided on the upper side of the traveling enameled wire, and the orifice portion for blowing high pressure air to the traveling enameled wire, A line runout prevention device that is provided under the traveling enameled wire that faces the orifice and prevents the running enameled line from swinging, and a direction that is provided on the lower side of this line antivibration device to cover the lower side of the traveling enameled wire. The guide plate, the orifice on the upper side of the traveling enamel line, and the exhaust hood that surrounds the direction guide plate are provided, so the air that passes through the orifice becomes a low-temperature high-speed air due to adiabatic expansion. As the traveling enameled wire is cooled, it is possible to cool the traveling enameled wire 3 at high speed, and the enameled wire baking device can cope with the speedup of the traveling enameled wire. It is possible to obtain.

[Brief description of drawings]

FIG. 1 shows an embodiment of an enameled wire printing apparatus of the present invention, (a) is a side view, and (b) is an enlarged side view of a cooling device of (a).

[Explanation of symbols]

 1 Baking Furnace 2 Cooling Device 3 Traveling Enamel Wire 4 High Pressure Air 5 Orifice 6 Line Runout Prevention Device 7 Directional Guide Plate 8 Exhaust Hood

Claims (1)

[Scope of utility model registration request] Claim: What is claimed is: 1. An enameled wire baking apparatus comprising a baking furnace and a cooling device for repeatedly carrying out baking and cooling, wherein a cooling device for cooling a traveling enameled wire coming out of the baking furnace comprises:
An orifice portion that is provided on the upper side of the traveling enameled wire and blows high-pressure air to the traveling enameled wire, and a wire that is provided below the traveling enameled wire that faces the orifice portion and that prevents the traveling enameled wire from swinging. A shake prevention device, a direction guide plate which is provided on a lower side of the line shake prevention device so as to cover a lower side of the traveling enamel line, and both ends of which are directed toward the traveling enamel line side, and the traveling enamel. An enameled wire printing apparatus, comprising an orifice part and an exhaust hood provided on the upper side of the wire so as to surround the direction guide plate.