JP2996133B2 - Device for preventing twisting of rectangular conductors during coating - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for preventing twisting of a rectangular conductor in a crosshead, which prevents twisting of the rectangular conductor inside a crosshead when a coating is formed on the outside of the rectangular conductor by an extruder.

[0002]

2. Description of the Related Art Conventionally, when a coating is formed on the outside of a rectangular conductor by an extruder, for example, as shown in FIG. The rectangular conductor 5 is fed through the passage 4 at the end of the point 1 and connected to the extrusion port.
Is extruded from the opening at the tip of the die 2, a coating layer 6 made of the coating material supplied into the die 2 is formed outside the rectangular conductor 5 as shown by an arrow in FIG. 5, and a coated electric wire is obtained. It has become.

At this time, in order to prevent the rectangular conductor 5 from being twisted when passing through the passage 4 at the point 1, as shown in FIG. A similar quadrangle is used, and the outer diameter of the longitudinal section of the passage 4 is slightly larger than that of the rectangular conductor 5.

However, when the outer diameter of the longitudinal section of the passage 4 is slightly larger than that of the rectangular conductor 5, the rectangular conductor 5
When the size of the passage 4 becomes small, the size of the passage 4 also becomes small, and since it is a square hole unlike a round hole, high machining accuracy is required when forming the passage 4 at the point 1, and the rectangular conductor 5 When the rectangular conductor 5 passes, the rectangular conductor 5 comes into sliding contact with the inner wall of the passage 4 and is scraped off, and tin residue or copper powder on the surface of the rectangular conductor 5 may become clogged in the passage 4 and cause disconnection.

Therefore, as shown in FIG. 7, it is conceivable to increase the clearance between the inner wall of the passage 4 and the rectangular conductor 5 by slightly increasing the outer diameter of the longitudinal section of the passage 4.

[0006]

However, if the clearance between the inner wall of the passage 4 and the rectangular conductor 5 is increased by increasing the outer diameter of the longitudinal section of the passage 4 as described above, the passage 4 can be easily processed. Although the clogging by the tin residue and the copper powder is eliminated, when the rectangular conductor 5 is fed in the passage 4 at the point 1, the rectangular conductor 5 is easily twisted as shown in FIG. When the cross section of the covered electric wire obtained through the passage 4 slightly larger than 5 is normal without the eccentricity of the rectangular conductor 5 as shown in FIG. 9, when the clearance is increased, it is shown in FIG. Thus, the eccentricity of the rectangular conductor 5 occurs.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to facilitate machining of a point passage and to prevent twisting of a rectangular conductor passing through the passage. Aim.

[0008]

According to the first aspect of the present invention,
A coating material supplied into the die is extrusion-coated on the outside of a rectangular conductor which is connected to the extrusion port of the extruder and which is formed of a point and a die outside the point and which is fed substantially horizontally in the passage of the point. A cross roller, a first roller provided in front of the cross head so as to be movable in a horizontal direction orthogonal to a feeding direction of the rectangular conductor, and having a central axis installed in parallel with the horizontal direction; A guide groove formed on a peripheral surface of a roller and into which the rectangular conductor is fitted and slidably contacted; a first driving means for moving the first roller to adjust a horizontal position of the rectangular conductor in the path of the point; A second roller provided between the crosshead and the first roller so as to be vertically movable and having a central axis provided in parallel with the central axis of the first roller, wherein the rectangular conductor slides on a peripheral surface; Previous It is characterized in that a second drive means for adjusting the vertical position in the path of the point of the rectangular conductor by moving the second roller.

Further, it is effective that the longitudinal cross-sectional shape of the passage at the point is a circle having a diameter slightly larger than the width of the rectangular conductor.

[0010]

According to the first aspect of the present invention, the first roller is moved in the horizontal direction by the first drive means, and the rectangular conductor fitted in the guide groove of the first roller is also moved in the horizontal direction together with the first roller. The horizontal position of the rectangular conductor in the path of the point is adjusted, the second roller is moved in the vertical direction by the second driving means, and the rectangular conductor is also moved in the vertical direction together. The position is adjusted to prevent twisting of the rectangular conductor in the passage.

In this case, even if the longitudinal cross-sectional shape of the passage at the point is a circle having a diameter slightly larger than the width of the rectangular conductor, the rectangular shape is formed by the movement of the first and second rollers. Since the conductor is prevented from being twisted, machining of the passage is easier than in a conventional case having a square cross section.

[0012]

1 is a perspective view of one embodiment of the present invention, FIG. 2 is a plan view, FIG. 3 is a front view, and FIG. 4 is a partial sectional view.

As shown in FIGS. 1 to 3, the extruder 10
A crosshead 13 including a point 11 and a die 12 outside the point 11 is connected to the extrusion port of the screw 1.
By the rotation of 6, a coating material such as PE filled in a hopper (not shown) is fed to the die 12, and a rectangular conductor 18 is fed almost horizontally in a passage 17 formed at the tip of the point 11, When the rectangular conductor 18 is extruded from the opening at the tip of the die 12, a coating layer 19 of the coating material supplied into the die 12 is formed outside the rectangular conductor 18 as shown by solid arrows in FIGS. It is formed.

The longitudinal section of the passage 17 at the point 11 is formed in a circular shape having a diameter slightly larger than the width of the rectangular conductor 18 as shown in FIG.

A first roller 21 is provided in front of the crosshead 13, and the first roller 21 is provided movably in a horizontal direction perpendicular to the feeding direction of the rectangular conductor 18, and has a central axis. A guide groove 22 is provided in parallel with the horizontal direction, and the flat surface of the first roller 21 is formed with a guide groove 22 in which the rectangular conductor 18 is fitted and slidably contacted. As a result, the first roller 21 is moved in the horizontal direction as described above, and the rectangular conductor 18 is also moved together.
The horizontal position within 7 is adjusted.

The cross head 13 and the first roller 2
A second roller 24 having a columnar shape is vertically movable between the first roller 1 and the lower surface of the rectangular conductor 18 in sliding contact with the peripheral surface thereof.
The central axis of the second roller 24 is set in parallel with the central axis of the first roller 21, and the second roller 24 is moved vertically by a second driving means such as a motor (not shown) so that The conductor 18 is also moved up and down so that the vertical position of the point 11 of the rectangular conductor 18 in the passage 17 is adjusted.

Further, a third roller having substantially the same shape as the second roller 24 is provided between the second roller 24 and the first roller 21.
And the fourth rollers 25 and 26 are the second rollers 2 respectively.
4, the upper surface of the rectangular conductor 18 is in sliding contact with the peripheral surface of the third roller 25, and the lower surface of the rectangular conductor 18 is in sliding contact with the peripheral surface of the fourth roller 26. The sliding contact position of the conductor 18 with the third roller 25 is shifted downward from the sliding contact position of the second roller 24, and the sliding contact position of the rectangular conductor 18 with the fourth roller 26 is Are set at substantially the same height position as the sliding contact position with.

Therefore, the rectangular conductor 18 in the passage 17
Is twisted, the first and second driving means move the first and second rollers 21 and 24 as appropriate, and the movement of the first and second rollers 21 and 24 causes the rectangular conductor 1 to move.
8 is also moved in each direction together, so that point 11
The horizontal and vertical positions of the rectangular conductor 18 in the passage 17 can be adjusted, and the twist of the rectangular conductor 18 in the passage 17 can be prevented.

At this time, even if the longitudinal sectional shape of the passage 17 at the point 11 is a circle having a diameter slightly larger than the width of the rectangular conductor 18, the movement of the first and second rollers 21 and 24 causes the rectangular conductor 18 to move. Can be prevented, the clearance becomes large, the passage can be easily processed as compared with the case of the conventional square cross section, and the passage 17 is not clogged with the conventional tin residue or copper powder. .

It should be noted that the third and fourth rollers 25 and 26 in the above embodiment are not particularly required. When only the first and second rollers 21 and 24 are provided, the sliding contact surface of the rectangular conductor 18 is not required. Guide groove 22 of first roller 21 and second roller 2
4 and the slide contact position of the rectangular conductor 18 with the guide groove 22 may be set higher or lower than the slide contact position with the second roller 24.

[0021]

As described above, according to the first aspect of the present invention, the rectangular conductor is moved in the horizontal direction by the movement of the first roller in the horizontal direction by the first driving means, and the rectangular conductor is moved by the second driving means. The movement of the second roller causes the rectangular conductor to move in the vertical direction, and the movement of the first and second rollers can adjust the horizontal and vertical positions of the rectangular conductor in the path of the point. Can be prevented, and a covered electric wire made of a rectangular conductor without eccentricity can be obtained.

Further, even if the longitudinal cross-sectional shape of the passage at the point is a circle having a diameter slightly larger than the width of the rectangular conductor, the rectangular conductor is formed by the movement of the first and second rollers. To prevent twisting, the clearance can be increased, and the passage of the point can be easily processed as compared with the case of the conventional square cross section, and the generation of tin residue and copper powder of the flat conductor as in the past Therefore, clogging of the passage can be prevented.

[Brief description of the drawings]

FIG. 1 is a perspective view of one embodiment of the present invention.

FIG. 2 is a partially cut plan view of one embodiment.

FIG. 3 is a partially cut front view of one embodiment.

FIG. 4 is a partial cross-sectional view of one embodiment.

FIG. 5 is a cut-away front view of a conventional example.

FIG. 6 is a partial cross-sectional view of a conventional example.

FIG. 7 is a partial cross-sectional view of another conventional example.

FIG. 8 is a cutaway front view of another conventional example.

FIG. 9 is an operation explanatory diagram of a conventional example.

FIG. 10 is an operation explanatory diagram of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Extruder 11 Point 12 Die 13 Crosshead 17 Passage 18 Rectangular conductor 19 Coating layer 21 1st roller 22 Guide groove 24, 25, 26 2nd, 3rd, 4th roller

Claims (3)

(57) [Claims] 1. A coating provided in said die outside a rectangular conductor which comprises a point and a die outside said point and which is connected to the extrusion port of the extruder and which is fed substantially horizontally in the passage of said point. A cross roller for extruding and covering a material; a first roller provided in front of the cross head so as to be movable in a horizontal direction orthogonal to a feeding direction of the rectangular conductor and having a central axis installed in parallel with the horizontal direction; A guide groove formed on the peripheral surface of the first roller and into which the rectangular conductor is fitted and slidably contacted; and a guide groove for moving the first roller to adjust a horizontal position of the rectangular conductor in the path of the point. (1) a driving means, a vertically movable center disposed between the crosshead and the first roller, a central axis provided in parallel with the central axis of the first roller, and the rectangular conductor being in sliding contact with the peripheral surface. And a second drive means for adjusting the vertical position of the rectangular conductor in the path of the point by moving the second roller, wherein the rectangular conductor is prevented from being twisted during coating. . 2. The device according to claim 1, wherein a longitudinal cross-sectional shape of the passage at the point is a circle having a diameter slightly larger than a width of the rectangular conductor. 3. A third roller is provided between the first roller and the second roller, and a surface of the rectangular conductor opposite to a surface slidingly contacting the second roller on both surfaces of the rectangular conductor. The rectangular conductor is in sliding contact with the third roller, and the sliding contact position of the rectangular conductor with the third roller is shifted upward or downward from the sliding contact position with the second roller. 3. The twist prevention device for a rectangular conductor according to claim 1 or 2, wherein the conductor is twisted during coating.