JP2004306592A - Method of winding core wire around metal mold roll and apparatus for the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide the method of achieving accurate alignment even when winding a core wire existing between the metal mold forming rolls, and an apparatus for the same. <P>SOLUTION: The method of spirally winding around a pair of metal mold rolls 2, 3 arranged in parallel and given a fixed space the core wire 8 at a specified pitch comprises the steps of installing a rotatable guide roller 4 having a series of spiral grooves 5 between the rolls 2, 3, fixing several sites in a group of the core wire toward a longitudinal direction at the start of winding between the metal mold rolls 2, 3, forming the guide core wire 7 by distributing the fixed positions 10, 11, 12 in the longitudinal direction of the wire, fitting the guide core wire 7 in the spiral groove 5 of the guide roller 4, moving the core wire 8 by rotating the roll to an axial direction of the roll. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a method and an apparatus for winding a core wire around a die roll, and more particularly, to a process for manufacturing a power transmission belt, in which a core wire is provided between a pair of die rolls arranged in parallel with each other at a predetermined interval. And a device for winding a core wire around a mold roll.

  Conventionally, as a method of manufacturing a power transmission belt, a pair of parallel mold rolls at least one of which is driven and rotated is arranged so that the distance between the axes can be adjusted, and the pair of mold rolls is provided with a cord made of cord and unvulcanized. There is known a biaxial molding method in which a power transmission belt body is manufactured by winding a rubber sheet with a rubber sheet.

  In the production of such a power transmission belt, first, it is necessary to spirally wind a twisted core cord between mold rolls at a predetermined pitch.

  As a method of winding the core cord, Patent Literature 1 discloses a core winding method in which a core is wound spirally at equal intervals between integral mold rolls. A rotatable guide roller having circumferentially, equally-spaced guide grooves on the surface is provided so that this axis intersects with the axis of the mold roll at a predetermined angle, and the guide groove of the guide roller is provided in the cord. Is passed between the pair of mold rolls, and while applying a predetermined tension to the core wire, the pair of mold rolls is rotated, and the entire core wire is automatically placed in the axial direction between the mold rolls. It is proposed to wrap while moving it.

JP 2001-205714 A

  In this core wire winding method, a guide roller that intersects the axis of the mold roll at a predetermined angle is used, and the entire twisted core is wound while being moved in the axial direction between the mold rolls. Therefore, if the crossing angle of the guide rollers is not appropriate, the alignment of the cords between the mold rolls may be lost. Further, in this winding method, when the S twist and the Z twist are simultaneously wound, a phenomenon occurs in which the wound core wire rides on the core wire that has been wound during spinning, and the winding operation may not be performed.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a method and an apparatus for winding a core cord around a mold roll, which can ensure the alignment even when the core wire between the mold rolls is wound.

The invention according to claim 1 of the present application is a core wire winding method in which a core wire is spirally wound at a predetermined pitch between a pair of mold rolls arranged in parallel at a predetermined interval,
Between a pair of mold rolls arranged in parallel with each other, a rotatable guide roller having a continuous spiral groove is arranged,
After forming a guide core by dispersing the fixed positions in the longitudinal direction of the core while fixing a plurality of locations in a group of the cores at the beginning of winding between the mold rolls,
While inserting the guide core wire into the spiral groove of the guide roller, the mold roll is rotated and the core wire is moved in the axial direction of the mold roll by the feed roll to form a spiral at a predetermined pitch on the mold roll. There is a method of winding a core wire around a mold roll.

  The invention according to claim 2 of the present application is a method of winding a core wire around a mold roll such that the core wire fixing position remains at the same position as the start position even when the guide core wire makes a round between the pair of mold rolls. In order to keep the winding start part of the core wire in a stable position at all times. The arrangement of the newly laid cores becomes stable and good.

  According to the invention described in claim 3 of the present application, when the guide core wire makes a round between a pair of mold rolls, the feed roll moves by a pitch corresponding to the number of core wires, and the guide roller also rotates to move the core wire. There is a method of winding a core wire around a die roll that feeds in the axial direction by a pitch corresponding to the number, and the core wires can be aligned without being disturbed.

  The invention according to claim 4 of the present application is a method for winding a core wire around a mold roll, which simultaneously winds a pair of S-twisted and Z-twisted cords as a core wire, and winds the core wire efficiently and aligned. be able to.

  The invention according to claim 5 of the present application is a method of winding a core wire around a mold roll that transmits the rotation of one driving mold roll to the other driven mold roll by a synchronous transmission member. Since the mold rolls can be synchronized even during acceleration and deceleration, the core wire does not slip on the mold rolls, and the core wires at the upper span (tension side) and the lower span (loose side) The tension difference is reduced, and the variation in the length of the formed belt is also reduced.

The invention according to claim 6 of the present application is a core wire winding device that spirally winds a core wire at a predetermined pitch between a pair of mold rolls arranged in parallel with each other at a predetermined interval,
A rotatable guide roller that is located between the mold rolls and guides the core wire to a continuous spiral groove provided at a predetermined pitch interval,
A plurality of cores at the beginning of winding are fixed between the mold rolls at a plurality of positions in a group, and the fixing positions are dispersed in the longitudinal direction of the cores. A feed roll that is moved at a predetermined pitch from one end of the mold roll to the other end by moving the
In a core wire winding device around a mold roll.

  According to the invention described in claim 7 of the present application, when the guide core wire makes a round between a pair of mold rolls, the feed roll moves by a pitch corresponding to the number of core wires, and the guide roller also rotates to move the core wire. The apparatus for winding a core wire around a die roll that feeds in the axial direction by the pitch corresponding to the number of the core wires has an effect of greatly reducing the winding time of the core wire.

  The invention according to claim 8 of the present application is an apparatus for winding a core wire around a die roll that simultaneously winds a pair of S twisted and Z twisted cords as a core wire, and winds the core wire efficiently and aligned. Device that can

  The invention according to claim 9 of the present application is such that a synchronous transmission member is mounted between a pair of mold rolls disposed in parallel with each other at a predetermined interval, and acceleration and deceleration of the pair of mold rolls is performed even during acceleration and deceleration. The phases can be matched. Since the synchronization of the mold rolls can be ensured even when the mold rolls are accelerated or decelerated, the difference in tension between the core wires on the upper span (tension side) and the lower span (loose side) is reduced, and the molding is performed. Belt length variations are also reduced.

  As described above, according to the method and the apparatus for winding a core wire around a mold roll according to the present invention, a core wire to be wound is obtained by using a guide core wire in which core wire fixing positions are dispersed in the longitudinal direction of the core wire. Is fitted into the spiral groove, there is no erroneous fitting, and there is no lateral displacement of the core wire during running, so that the guide roller can be smoothly moved over and the core wire fixing position does not come off. The alignment of the wires is assured, and the alignment of the cores is improved.

  Furthermore, a synchronous transmission member is mounted between a pair of mold rolls disposed parallel to each other at a predetermined interval, and is synchronously driven, so that the phases of the pair of mold rolls are matched even during acceleration and deceleration. , The core wire does not slip on the mold roll, and the tension difference between the core wires at the upper span (tension side) and the lower span (loose side) is reduced, and the length of the formed belt is reduced. The variation in the size is also small.

Hereinafter, an example of an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic view of an apparatus for winding a core wire around a mold roll according to the present invention, FIG. 2 is a plan view of FIG. 1, FIG. 3 is an enlarged view of a core fixing portion, and FIGS. , (C) and (d) are diagrams showing a process of winding the core wire around the pair of mold rolls one round.

  According to this, the core wire winding device 1 of the present invention includes a pair of mold rolls 2 and 3, a rotatable guide roller 4 having a spiral groove 5 located therebetween, a guide core wire 7, and a feed roll 13. It is composed of

  The first mold roll 2 and the second mold roll 3 are cylindrical bodies formed of a rotatable toothed mold or a flat roll forming part A having the same diameter and the same length, and the main electric motors 13 and 14, respectively. It can be driven and rotated freely. These two main electric motors 15 and 16 drive and rotate the first mold roll 2 and the second mold roll 3 in the same direction (direction indicated by an arrow) and at the same rotation speed by the function of the device. It is. Of course, the distance between the axes of the first mold roll 2 and the second mold roll 3 can be adjusted.

A guide roller 4 having a continuous screw-shaped spiral groove 5 at a predetermined pitch P is arranged near the mold roll 2 between the mold rolls 2 and 3, and rotates the core 8 while rotating. A predetermined pitch is fed in the axial direction of No. 3. That is, when the core wire 8, which is a pair of S-twisted and Z-twisted cords, makes a round between the pair of mold rolls 2 and 3, the guide roller 4 also rotates to move the core wire 8 by two pitches in the axial direction. Send to
The shape of the spiral groove 5 of the guide roller 4 is not particularly limited, but the spiral groove 5 has a pitch groove of 0.3 to 2.0 mm and a groove depth of 0.1 to 1.0 mm. .

  The guide core wire 7 forms a winding start portion 9 of the core wire 8 between the pair of mold rolls 2 and 3, and a plurality of core wires 8 existing in the winding start portion 9 are grouped in groups (in the drawing, FIG. The cores 8 are fixed at three (3) core fixing positions 10, 11, and 12, and the positions of the core fixing positions 10, 11, and 12 are dispersed in the longitudinal direction of the core 8, and the cores 8 are individually fixed.

  That is, as shown in FIG. 3, the winding start portion 9 of the core wire 8 is divided into three groups of six core wires 8 and fixed by three fixing positions 10, 11, and 12, and the positions are centered. The core wire 8 is strongly and securely fixed by being dispersed in the longitudinal direction of the wire 8.

  If the core 8 is a metal cord such as a wire, the fixing position 10 is to fix four outermost cores 8a, 8b, 8c, 8d by soldering, and the fixing position 11 is 8b, 8c. , 8d, 8e are similarly secured, and the securing position 12 secures 8c, 8d, 8e, 8f and secures the individual cores. As described above, since the fixing positions are dispersed in the guide core wire 7 and the individual core wires 8 are fixed at a plurality of positions, the core wire fixing portion 7 is securely inserted into the spiral groove 5 when the guide wire 4 is passed over. It moves without disengagement while fitting.

  The number of the fixed positions 10, 11, and 12 of the core wire is 2 to 5, and the interval is set to be equal to or slightly larger than the diameter of the guide roller 4 to prevent the core 8 from being shifted laterally while fixing the core. The part can be passed over the guide roller 4 while being fitted into the spiral groove 5 of the guide roller 4. The interval between the fixed positions is usually 30 to 70 mm.

  The feed roll 13 moves the core wire 8, which is a pair of S-twisted and Z-twisted cords, in the axial direction (X direction) of the mold rolls 2 and 3 from one end of the mold roll to the other end. When the core wire 8 makes a round between the mold rolls 2 and 3, the core wire 8 moves synchronously by the pitch corresponding to the two core wires.

The operation of the above-described core wire winding device 1 will be described below with reference to FIG.
(1) As shown in FIG. 4 (a), three sets of cords 8, which are a pair of S-twisted and Z-twisted cords, are pulled out and wound around the mold rolls 2 and 3 to form a spiral of the guide roller 4. After fitting in the groove 5, the guide core wire 7 is formed. Four of the guide cores 7 including the outermost core at the winding start portion 9 of the core 8 are first soldered to the first fixed position 10, and then the second core from the outermost. 8 are shifted from the first fixing position 10 in the longitudinal direction to the second fixing position 11 by soldering in the same manner, and the four wires including the third core wire 8 from the outermost are set to the second fixing position 11. The third fixing position 12 is formed by displacing the fixing position 11 in the longitudinal direction from the fixing position 11 by soldering in the same manner.

(2) After tension is applied by slightly moving one of the mold rolls 2 and 3 in the longitudinal direction, the rotation of the mold rolls 2 and 3 and the guide roller 4 and the movement of the feed roll 13 are adjusted to adjust the core wire 8. The winding around the mold rolls 2 and 3 was started. At this time, when the core wire 8 makes a round between the mold rolls 2 and 3, the feed roll 13 is adjusted so as to move by a pitch corresponding to two core wires, and the rotation speed of the guide roller 4 is also adjusted. The number of rotations is adjusted so as to feed in the axial direction by a pitch corresponding to the two numbers.

(3) As shown in FIG. 4 (b), since the fixed positions 10, 11, and 12 of the guide core wire 7 are dispersed and the individual core wires 8 are firmly fixed at a plurality of positions, 4 smoothly passes through the spiral groove 5, and the core wire 8 does not come off at the fixed positions 10, 11, 12 during winding.

(4) As shown in FIGS. 4 (c) and 4 (d), when the guide core wire 7 moves and makes a round between the mold rolls 2 and 3, the feed roll 13 is moved in the direction indicated by the arrow in the figure to the number of core wires. , And the guide roller 4 is also rotated to feed the cores 8 in the axial direction synchronously by the pitch corresponding to the number of the guide cores 4, and the guide cores 7 are positioned at the same position as the start position. And the alignment of the cords is ensured. In addition, the arrangement of the completed core group becomes good.

  By using this core wire winding method, it is possible to cope with the production of various types of belts (wide belt, V-ribbed belt, toothed belt, etc.) at the stage before forming the tooth profile. In addition, since the mold roll 2.3 can be a flat roll, the same mold roll 2.3 can be used from the core wire winding step to the cutting step, for example, by using a urethane roll for the surface.

  In the winding method and the winding device of the above-described embodiment, the mold rolls 2 and 3 are not limited to flat rolls, but may be circumferentially toothed rolls. Even in this case, the alignment state of the cords can be improved. Further, the guide roller 4 can be arranged not only in the vicinity of the mold roll 2 but also in the vicinity of the mold roll 3, or can be arranged in the vicinity of both the mold rolls 2 and 3.

  Further, as another embodiment of the present invention, as shown in FIG. 5, a first mold roll 2 and a second mold roll 3, which are arranged in parallel with each other at a predetermined interval, are arranged. An electric motor 17 is attached to the mold roll 2, and a synchronous transmission member 20 such as a toothed belt is attached to an end between the first mold roll 2 and the second mold roll 3. As a result, the rotation of the first mold roll 2 and the rotation of the second mold roll 3 are ranked first and the phase matching is ensured, so that the synchronization of each mold roll can be ensured even during acceleration and deceleration of the mold rolls. Therefore, the core wire does not slip on the mold roll, and the tension difference between the core wires on the upper span (tension side) and the lower span (loose side) is reduced, and the length of the formed belt varies. Is also smaller.

  INDUSTRIAL APPLICABILITY The method and apparatus for winding a core wire around a mold roll according to the present invention can be applied to, for example, the manufacture of a long endless toothed belt made of a thermoplastic elastomer.

1 is a schematic view of a core wire winding device around a mold roll according to the present invention. FIG. 2 is a plan view of FIG. 1. It is an enlarged view of a guide core wire. (A), (b), (c), (d) is a figure which shows the process of winding a core wire one round around a pair of metal mold rolls. FIG. 5 is a plan view of a device for winding a core wire around another mold roll according to the present invention.

Explanation of reference numerals

REFERENCE SIGNS LIST 1 core winding device 2 mold roll 3 mold roll 4 guide roller 5 spiral groove 7 guide core 8 core 9 winding start part 10 core fixed position 11 core fixed position 12 core fixed position 13 feed roll 20 synchronization Transmission member

Claims (9)

A core wire winding method in which a core wire is spirally wound at a predetermined pitch between a pair of mold rolls arranged in parallel with each other at a predetermined interval,
Between a pair of mold rolls arranged in parallel with each other, a rotatable guide roller having a continuous spiral groove is arranged,
After forming a guide core by dispersing the fixed positions in the longitudinal direction of the core while fixing a plurality of locations in a group of the cores at the beginning of winding between the mold rolls,
While inserting the guide core wire into the spiral groove of the guide roller, the mold roll is rotated and the core wire is moved in the axial direction of the mold roll by the feed roll to form a spiral on the mold roll at a predetermined pitch. Wrap,
A method of winding a core wire around a mold roll.   2. The method of winding a core wire around a mold roll according to claim 1, wherein the core wire fixing position remains at the same position as the start position even when the guide core wire makes a round between the pair of mold rolls.   When the guide core wire makes a round between the pair of mold rolls, the feed roll moves by the pitch corresponding to the number of core wires, and the guide roller also rotates to move the core wire in the axial direction by the pitch corresponding to the number of core wires. 3. The method of winding a core wire around a mold roll according to claim 1 or 2.   The method of winding a core wire around a die roll according to any one of claims 1 to 3, wherein a pair of S-twisted and Z-twisted cords are simultaneously wound as the core wire.   The method of winding a core wire around a die roll according to any one of claims 1 to 4, wherein the rotation of one drive-side die roll is transmitted to the other driven die roll by a synchronous transmission member. A core wire winding device that spirally winds a core wire at a predetermined pitch between a pair of mold rolls arranged in parallel with each other at a predetermined interval,
A rotatable guide roller that is located between the mold rolls and guides the core wire to a continuous spiral groove provided at a predetermined pitch interval,
A plurality of cores at the beginning of winding between the mold rolls are fixed in groups at a plurality of positions, and the fixing positions are dispersed in the longitudinal direction of the cores. A feed roll that is moved at a predetermined pitch from one end of the mold roll to the other end by moving the
An apparatus for winding a core wire around a mold roll, comprising:   When the guide core wire makes a round between the pair of mold rolls, the feed roll moves by the pitch corresponding to the number of core wires, and the guide roller also rotates to move the core wire in the axial direction by the pitch corresponding to the number of core wires. An apparatus for winding a core wire around a mold roll according to claim 6.   The apparatus for winding a core wire around a mold roll according to claim 6 or 7, wherein a pair of S-twisted and Z-twisted cords are simultaneously wound as the core wire. The core wire winding device according to any one of claims 6 to 8, wherein a synchronous transmission member is mounted between a pair of mold rolls arranged parallel to each other at a predetermined interval.

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