CN216225770U - Ultrasonic cleaning device for copper wire - Google Patents
Ultrasonic cleaning device for copper wire Download PDFInfo
- Publication number
- CN216225770U CN216225770U CN202122870209.1U CN202122870209U CN216225770U CN 216225770 U CN216225770 U CN 216225770U CN 202122870209 U CN202122870209 U CN 202122870209U CN 216225770 U CN216225770 U CN 216225770U
- Authority
- CN
- China
- Prior art keywords
- water
- ultrasonic
- guide head
- copper wire
- cleaning cavity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Cleaning By Liquid Or Steam (AREA)
Abstract
An ultrasonic cleaning device for a copper wire comprises a cleaning cavity, an ultrasonic vibrator and a jacket water nozzle; the cleaning cavity is provided with a feeding guide head and a discharging guide head for the copper wire to come in and go out, the feeding guide head and the discharging guide head are arranged oppositely, and a plurality of ultrasonic vibrators are arranged in the cleaning cavity; the outside of ejection of compact guide head is located to the cover water injection well choke cover, is equipped with logical water zone between the inner wall of cover water injection well choke and the outside of ejection of compact guide head, leads to the water zone and is equipped with water inlet and water jet, and the water inlet is external to have a water pump, and the water jet is located clean intracavity, and the play water direction of water jet is opposite with the ejection of compact direction of ejection of compact guide head. The water sprayed from the water outlet of the jacket water nozzle can collide with the water driven by the copper wire when moving, so that the flowing of the water body caused by the movement of the copper wire is offset. The water body in the cleaning cavity is kept still all the time, the effect of air explosion caused by the fact that water flows to interfere with the water body bombarded by ultrasonic waves is relieved, and the cleaning effect efficiency is improved.
Description
Technical Field
The utility model relates to the technical field of enameled wire cleaning, in particular to an ultrasonic cleaning device for a copper wire.
Background
Ultrasonic cleaning (ultrasonic cleaning) is to disperse, emulsify and peel off a dirt layer to achieve the purpose of cleaning by utilizing the direct and indirect actions of cavitation action, acceleration action and direct current action of ultrasonic waves in liquid on liquid and the dirt.
The existing ultrasonic cleaning technology is to clean objects in a static water body, because when water flows, the air explosion effect of ultrasonic waves on the water body can be reduced, and the surfaces of the objects cannot be effectively cleaned by the ultrasonic waves.
In the production of enameled wires, the surface of a copper wire needs to be cleaned before the copper wire is coated with paint. The copper wire in the enameled wire is very long, the short length is 1-10 meters, and the long length can reach 100 meters; moreover, the copper wire cannot be folded in the production process, and if the existing ultrasonic cleaning device is used for cleaning the copper wire, a very large cleaning cavity needs to be prepared and a great number of ultrasonic vibrators need to be installed. In this way, the production cost is very high, and the production area is occupied, so that the ultrasonic cleaning device cannot be applied to the production of the enameled wire.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned drawbacks, an object of the present invention is to provide an ultrasonic cleaning apparatus capable of cleaning an object while the object is moving, so as to solve the dilemma that the ultrasonic cleaning apparatus cannot be used in the production of enameled wire.
In order to achieve the purpose, the utility model adopts the following technical scheme: an ultrasonic cleaning device for a copper wire comprises a cleaning cavity, an ultrasonic vibrator and a jacket water nozzle;
the cleaning cavity is provided with a feeding guide head and a discharging guide head for the copper wire to come in and go out, the feeding guide head and the discharging guide head are arranged oppositely, and a plurality of ultrasonic vibrators are arranged in the cleaning cavity;
the jacket water nozzle is sleeved outside the discharging guide head, a water passing area is arranged between the inner wall of the jacket water nozzle and the outside of the discharging guide head, the water passing area is provided with a water inlet and a water spraying opening, the water inlet is externally connected with a water pump, the water spraying opening is located in the cleaning cavity, and the water outlet direction of the water spraying opening is opposite to the discharging direction of the discharging guide head.
Preferably, the discharging guide head is in a circular truncated cone shape, and one end of the discharging guide head with a small caliber faces the cleaning cavity.
Preferably, the discharging guide head is filled with water.
Preferably, the ultrasonic vibrators are respectively and uniformly distributed on the upper end face and the lower end face of the cleaning cavity;
the ultrasonic vibrators located on the upper end face of the cleaning cavity correspond to the ultrasonic vibrators located on the lower end face of the cleaning cavity in a one-to-one mode, and the ultrasonic vibrators located on the same end face are opposite to the adjacent ultrasonic vibrators in vibration directions.
Preferably, the ultrasonic vibrators with the opposite vibration directions on the upper end face and the lower end face of the cleaning cavity are vibrators with opposite vibration directions.
Preferably, the central axis connecting line of the feeding guide head and the discharging guide head is superposed with the horizontal central line of the cleaning cavity.
Preferably, the ultrasonic cleaning device further comprises an overflow outlet pipe, the overflow outlet pipe is communicated with the cleaning cavity, and the level of the overflow outlet pipe is higher than the highest level of the ultrasonic vibrator.
Preferably, the cleaning cavity is further provided with a flow speed detection probe, and the flow speed detection probe is electrically connected with the water pump.
Preferably, the ultrasonic vibrator is electrically connected with the power amplifier.
One of the above technical solutions has the following advantages or beneficial effects: water sprayed from the water outlet of the jacket water nozzle can collide with water driven by the copper wire when moving, so that the flowing of water caused by the movement of the copper wire is counteracted. So as to ensure that the water body in the cleaning cavity is always in a relatively static state, the effect of air explosion caused by the fact that water flow interferes with the ultrasonic bombardment of the water body is slowed down, and the efficiency of the cleaning effect is improved.
Drawings
FIG. 1 is a schematic block diagram of one embodiment of the present invention;
fig. 2 is a schematic view of an oscillation stroke of the ultrasonic vibrator according to an embodiment of the present invention.
Wherein: the device comprises a cleaning cavity 1, an ultrasonic vibrator 2, a jacket water nozzle 3, a water spraying opening 3a, a feeding guide head 4, a discharging guide head 5, an overflow outlet pipe 6, a water pump 7, a flow velocity detection probe 8 and a water passing area 9.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1-2, an ultrasonic cleaning device for a copper wire comprises a cleaning cavity (1), an ultrasonic vibrator (2) and a jacket water nozzle (3);
the cleaning cavity (1) is provided with a feeding guide head (4) and a discharging guide head (5) for copper wires to come in and go out, the feeding guide head (4) and the discharging guide head (5) are arranged oppositely, and a plurality of ultrasonic vibrators (2) are arranged in the cleaning cavity (1);
the water discharging device is characterized in that the jacket water nozzle (3) is sleeved outside the discharging guide head (5), a water passing area (9) is arranged between the inner wall of the jacket water nozzle (3) and the outside of the discharging guide head (5), the water passing area (9) is provided with a water inlet and a water spraying opening (3a), the water inlet is externally connected with a water pump (7), the water spraying opening (3a) is located in the cleaning cavity (1), and the water discharging direction of the water spraying opening (3a) is opposite to the discharging direction of the discharging guide head (5).
This application ultrasonic cleaning device, when using, full water is filled in clean chamber (1), follows the copper line the feeding is led first (4) and is located to introduce in clean chamber (1), then follows the clean chamber (1) is drawn forth in first (5) is led in the ejection of compact, be provided with ultrasonic vibrator (2) in clean chamber (1), at the removal in-process of copper line, ultrasonic vibrator (2) carry out high frequency vibration to the water to produce the phenomenon of empty explosion, clean the surface to the copper line. However, in the process of moving the copper wire, the copper wire can drive water flow, and the water flow can disturb the normal movement track of the wave to be unfavorable for the formation of empty explosion. For this reason, in this application ejection of compact guide head (5) are provided with and press from both sides cover water injection well choke (3), through water pump (7) water extraction to pressing from both sides cover water injection well choke (3), press from both sides the play water orientation of cover water injection well choke (3) feeding guide head (4) for the play water direction of the water jet (3a) that presss from both sides cover water injection well choke (3) with the ejection of compact direction of play (being the moving direction of copper line) of ejection of compact guide head (5) is opposite. When the copper line removed, can drive the water near the copper line, and press from both sides cover water injection well choke (3) cover and locate head (5) outside is led in the ejection of compact, and press from both sides the cover water injection well choke (3) and lead to separate between head (5) and have water passing area (9), the water of taking out of water pump is compressed in water passing area (9), and water is followed press from both sides cover water injection well choke (3) water jet (3a) blowout, the water that presss from both sides cover water injection well choke (3) water jet (3a) blowout can collide with the water that drives when the copper line removed to offset the copper line and arouse the flow of water because of removing. The water in the cleaning cavity (1) is in a relatively static state all the time, the effect of impact on water empty explosion caused by flow interference ultrasonic waves is reduced, and the cleaning effect efficiency is improved.
It is worth noting that the water flow speed sprayed by the water spraying opening (3a) of the jacket water nozzle (3) needs to be equal to the moving speed of the copper wire, so that the relative stillness of the water body can be ensured.
Preferably, the discharging guide head (5) is in a circular truncated cone shape, and one end of the discharging guide head (5) with a small caliber faces the cleaning cavity (1).
When the water pump pumps water and enters the jacket water nozzle (3), water flow collides with the outer wall of the discharging guide head (5), so that the function of guiding the water flow direction is achieved. In order to concentrate more press from both sides cover water injection well choke (3) spun water to and weaken the water velocity of flow that drives when the copper line removes, ejection of compact lead head (5) set up to round platform shape, and the outer wall that ejection of compact lead head (5) slope can more effectually concentrate rivers and erode the copper line, slows down because of the flowing interference ultrasonic wave bombardment water body air explosion effect, improves cleaning action efficiency.
Preferably, the discharge guide head (5) is filled with water.
Can follow outside access to water pipe and enter into when using the ultrasonic cleaning device of this application copper line in head (5) is led in the ejection of compact, make the ejection of compact lead head (5) inside full water. Because the inclined outer wall of the discharging guide head (5) can more effectively concentrate water flow, the flow speed at one end with a small caliber of the discharging guide head (5) is increased, the pressure at the position is low, if the discharging guide head (5) is not filled with water, a large amount of air can enter the jacket water nozzle (3) from one end with a small caliber of the discharging guide head (5), so that the water sprayed by the jacket water nozzle (3) contains a large amount of bubbles, and the introduction of the bubbles can weaken the air explosion effect of interfering ultrasonic waves to bombard water bodies, and reduce the cleanliness. The discharge guide (5) must be filled with water.
And the copper line is shifting out when clean chamber, can take out certain water, and after head (5) is filled with water to the inside to the ejection of compact, the small one end negative pressure of ejection of compact head (5) bore can with inside the ejection of compact head (5) is brought into press from both sides in cover water injection well choke (3), can reduce the volume of the water that takes away when the copper line shifts out like this.
Preferably, the ultrasonic vibrators (2) are respectively and uniformly distributed on the upper end face and the lower end face of the cleaning cavity (1);
the ultrasonic vibrators (2) are located on the upper end face of the cleaning cavity (1) and the lower end face of the cleaning cavity in a one-to-one correspondence mode, and the ultrasonic vibrators (2) located on the same end face are vibrators with the ultrasonic vibrators (2) adjacent to the ultrasonic vibrators, wherein the vibration directions of the vibrators are opposite.
In the conventional ultrasonic cleaning apparatus, the object is cleaned using vibration waves in different vibration directions in time series. However, in the present application, the copper wire is movable, and if the copper wire is cleaned in time sequence, the copper wire may not receive vibration in a certain direction, which may affect the cleaning effect. So this application is at same terminal surface ultrasonic vibrator (2) and adjacent ultrasonic vibrator (2) are the oscillator opposite in vibration direction for the copper line can receive the empty of many-sided ultrasonic vibrator (2) and explode when removing, has improved the clean efficiency of copper line. Simultaneously the up end and the lower terminal surface in clean chamber (1) evenly are provided with ultrasonic vibrator, have guaranteed that the upper and lower face homoenergetic of copper line is by clean, improve cleaning effect efficiency.
Preferably, the ultrasonic vibrators (2) of the cleaning cavity (1), of which the upper end face is opposite to the lower end face, are vibrators with opposite vibration directions.
The conventional ultrasonic waves do not have synchronous and anisotropic oscillation, the power needs to be increased for improving the cleaning effect, the oscillation of the ultrasonic vibrator (2) can reach the copper wire, and the copper wire is easily damaged due to the increase of the power. As shown in FIG. 2, in the technical scheme of the application, the oscillation stroke of the ultrasonic vibrator (2) to the water body in the same vibration direction is increased in the same vertical direction. The water body oscillation stroke is lengthened through synchronous anisotropic oscillation, so that the low-power cleaning effect is improved, and meanwhile, the copper wire can be protected to avoid the copper wire from receiving too large oscillation.
Preferably, the connecting line of the central axes of the feeding guide head (4) and the discharging guide head (5) is superposed with the horizontal central line of the cleaning cavity (1).
The oscillation degree received by the copper wire at the upper part and the lower part can be ensured to be equal. Ensuring the cleaning effect of each side.
Preferably, the ultrasonic cleaning device further comprises an overflow outlet pipe (6), wherein the overflow outlet pipe (6) is communicated with the cleaning cavity (1), and the level of the overflow outlet pipe (6) is higher than the highest level of the ultrasonic vibrator (2).
In the application, the water pump (7) is not required to be operated continuously, so that the water body in the cleaning cavity (1) is ensured to be in a relatively static state. Water can also continuously enter the cleaning cavity (1), and in order to avoid the cleaning cavity (1) from being burst by the water, an overflow outlet is required to be formed to help the water to flow out. However, when water flows out, the cleaning cavity (1) is also required to be filled with water, and only the ultrasonic vibrator (2) on the upper end surface of the cleaning cavity (1) can vibrate the water body in a water-filled state. Therefore, the level of the overflow outlet pipe (6) is higher than the highest level of the ultrasonic vibrator (2), and the ultrasonic vibrator (2) on the upper end surface of the cleaning cavity (1) can work normally in water according to the principle of a communicating vessel.
The pipe orifice of the overflow outlet pipe (6) can be connected to the water pumping position of the water pump (7) through a hose, so that water can be recycled, and water resources are saved.
Preferably, the cleaning cavity (1) is further provided with a flow speed detection probe (8), and the flow speed detection probe (8) is electrically connected with the water pump (7).
The flow velocity detection probe (8) is used for detecting the flow velocity of the water body in the cleaning cavity (1), when the flow velocity of the water body is higher than a threshold value, the water pumping quantity of the water pump can be adjusted, the water velocity of the water sprayed by the jacket water nozzle (3) can be adjusted, and the flow velocity of the water body can be controlled within the range of the threshold value.
Preferably, the ultrasonic vibrator (2) is electrically connected with a power amplifier.
The power amplifier can adjust the working frequency of the ultrasonic vibrator (2), when the diameter of a copper wire is large, the distance between the surface of the copper wire and the ultrasonic vibrator (2) is reduced, the working frequency of the ultrasonic vibrator (2) can be reduced at the moment, and the copper wire is prevented from being subjected to too strong vibration.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the utility model have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and their equivalents.
Claims (9)
1. An ultrasonic cleaning device for a copper wire is characterized by comprising a cleaning cavity (1), an ultrasonic vibrator (2) and a jacket water nozzle (3);
the cleaning cavity (1) is provided with a feeding guide head (4) and a discharging guide head (5) for copper wires to come in and go out, the feeding guide head (4) and the discharging guide head (5) are arranged oppositely, and a plurality of ultrasonic vibrators (2) are arranged in the cleaning cavity (1);
the water discharging device is characterized in that the jacket water nozzle (3) is sleeved outside the discharging guide head (5), a water passing area (9) is arranged between the inner wall of the jacket water nozzle (3) and the outside of the discharging guide head (5), the water passing area (9) is provided with a water inlet and a water spraying opening (3a), the water inlet is externally connected with a water pump (7), the water spraying opening (3a) is located in the cleaning cavity (1), and the water discharging direction of the water spraying opening (3a) is opposite to the discharging direction of the discharging guide head (5).
2. The ultrasonic cleaning device for the copper wire is characterized in that the discharging guide head (5) is in a circular truncated cone shape, and one end of the discharging guide head (5) with a small caliber is arranged towards the cleaning cavity (1).
3. The ultrasonic cleaning device for copper wires according to claim 2, characterized in that the inside of the discharge guide head (5) is filled with water.
4. The ultrasonic cleaning device for the copper wire is characterized in that the ultrasonic vibrators (2) are uniformly distributed on the upper end face and the lower end face of the cleaning cavity (1) respectively;
the ultrasonic vibrators (2) are located on the upper end face of the cleaning cavity (1) and the lower end face of the cleaning cavity in a one-to-one correspondence mode, and the ultrasonic vibrators (2) located on the same end face are vibrators with the ultrasonic vibrators (2) adjacent to the ultrasonic vibrators, wherein the vibration directions of the vibrators are opposite.
5. The ultrasonic cleaning device for the copper wire is characterized in that the ultrasonic vibrators (2) of the cleaning cavity (1), which are opposite to the upper end face and the lower end face, are vibrators with opposite vibration directions.
6. The ultrasonic cleaning device for the copper wires as claimed in claim 4, wherein the central axis connecting line of the feeding guide head (4) and the discharging guide head (5) is coincident with the horizontal central line of the cleaning cavity (1).
7. The ultrasonic cleaning device for the copper wire according to claim 4, further comprising an overflow outlet pipe (6), wherein the overflow outlet pipe (6) is communicated with the cleaning chamber (1), and the level of the overflow outlet pipe (6) is higher than the highest level of the ultrasonic vibrator (2).
8. The ultrasonic cleaning device for the copper wire according to claim 1 is characterized in that the cleaning cavity (1) is further provided with a flow rate detection probe (8), and the flow rate detection probe (8) is electrically connected with the water pump (7).
9. The ultrasonic cleaning device for the copper wire is characterized in that the ultrasonic vibrator (2) is electrically connected with a power amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122870209.1U CN216225770U (en) | 2021-11-19 | 2021-11-19 | Ultrasonic cleaning device for copper wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122870209.1U CN216225770U (en) | 2021-11-19 | 2021-11-19 | Ultrasonic cleaning device for copper wire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216225770U true CN216225770U (en) | 2022-04-08 |
Family
ID=80955292
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122870209.1U Active CN216225770U (en) | 2021-11-19 | 2021-11-19 | Ultrasonic cleaning device for copper wire |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216225770U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113953254A (en) * | 2021-11-19 | 2022-01-21 | 广东精达里亚特种漆包线有限公司 | Ultrasonic cleaning device and cleaning method for copper wire |
-
2021
- 2021-11-19 CN CN202122870209.1U patent/CN216225770U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113953254A (en) * | 2021-11-19 | 2022-01-21 | 广东精达里亚特种漆包线有限公司 | Ultrasonic cleaning device and cleaning method for copper wire |
| CN113953254B (en) * | 2021-11-19 | 2024-04-12 | 广东精达漆包线有限公司 | Ultrasonic cleaning device and method for copper wires |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11161157B2 (en) | Underwater cavitation jet cleaning system | |
| CN216225770U (en) | Ultrasonic cleaning device for copper wire | |
| CN201537609U (en) | Lacquered wire washing device | |
| CN101328709B (en) | Borehole cleaning method and apparatus for fast reverse circulation by using high pressure air | |
| CN113953254A (en) | Ultrasonic cleaning device and cleaning method for copper wire | |
| CN107073968B (en) | The bubble removal method of ink gun and the bubble removal device of ink gun | |
| CN216262410U (en) | Ultrasonic cleaning device for cleaning surface of semiconductor | |
| CN113663971A (en) | Engine part cleaning device | |
| CN116798914A (en) | Wafer cleaning device | |
| CN114670982B (en) | Ship body cleaning device based on cavitation water jet | |
| JP3485215B2 (en) | Cleaning equipment | |
| CN216319992U (en) | Spray drying system | |
| CN201094940Y (en) | Circumferential seam jet apparatus | |
| CN208643494U (en) | A kind of rice wine processing special raw material cleaning device | |
| CN214971944U (en) | Coating bubble eliminating device | |
| JP3374043B2 (en) | Liquid jet type washing machine by ultrasonic wave | |
| CN113996593A (en) | Ultrasonic cleaning device for cleaning surface of semiconductor | |
| US6223996B1 (en) | Ultrasonic liquid injection device | |
| CN216262411U (en) | Ultrasonic cleaning device capable of running stably | |
| CN221016874U (en) | Spraying device | |
| CN213153729U (en) | Aquatic product protein hydrolysis device | |
| CN110524436A (en) | A kind of sand blasting unit and cleaning system | |
| CN216304629U (en) | High-pressure jet grouting pile nozzle | |
| CN217251121U (en) | Five groove cleaning machines of robot | |
| CN116393305B (en) | Ultrasonic atomizer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 528225 No. 18, Dongfeng Road, Songgang Songxia Industrial Park, Shishan town, Nanhai District, Foshan City, Guangdong Province Patentee after: Guangdong Jingda Rea Special Enameled Wire Co.,Ltd. Address before: 528225 No. 18, Dongfeng Road, Songgang Songxia Industrial Park, Shishan town, Nanhai District, Foshan City, Guangdong Province Patentee before: GUANGDONG JINGDA REA SPECIAL ENAMELED WIRE CO.,LTD. |