JP5280164B2 - Winder guide device, reinforcing fiber bundle winding method, and reinforcing fiber bundle winding - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a guide for a winder of reinforcing fiber bundle stably winding reinforcing fiber around a bobbin without twisting of a reinforcing fiber bundle widened in a tape-like manner even if the reinforcing fiber has a large tow volume, and to provide a wound body of the reinforcing fiber bundle with stable tow width. <P>SOLUTION: The guide 10 traverses and guides the reinforcing fiber bundle with fineness of 12,000-40,000 dtex to the winder, and has a guide stand 12 reciprocating in parallel with an axial direction of the bobbin. The guide stand 12 includes: a first guide roller pair 20 installed so that an axial direction thereof is orthogonal to a travelling direction D of the reinforcing fiber bundle; and a second guide roller pair 30, which is installed downstream of the first guide roller pair 20 so that an axial direction thereof is orthogonal to the travelling direction D, and which is orthogonal to the axial direction of guide rollers of the first guide roller pair 20. The second guide roller pair 30 is constituted of a pillar-shaped second guide roller 32 and a drum-like second guide roller 34. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a guide device for a winder, a winding method of a reinforcing fiber bundle, and a winding body of the reinforcing fiber bundle.

Carbon fibers are rarely used alone because of their form and characteristics, and most of them are made by impregnating a resin such as an epoxy resin after arranging a plurality of fiber bundles in parallel (generally this is called a prepreg). ), Or after winding it in a cylindrical shape or covering it on a molded object, the resin is cured to produce a fiber-reinforced plastic molded product.
Since carbon fibers are lighter and stronger than other reinforcing fiber materials, in order to further utilize this characteristic, studies are being made to reduce the weight of prepregs in which carbon fibers are impregnated with a resin such as epoxy. . In order to reduce the weight of the carbon fiber prepreg, it is necessary to spread the carbon fiber thinly. For this reason, various measures are taken in manufacturing the prepreg.
Here, if the reinforcing fiber bundle such as carbon fiber supplied to the manufacturing process of the prepreg is preliminarily spread to a certain width, that is, the tape-like shape in which the reinforcing fiber bundle wound around the bobbin is widened. Then, the work of widening the width of the reinforcing fiber bundle in the prepreg manufacturing process can be omitted. For this reason, recently, a wound body in which a tape-shaped reinforcing fiber bundle that has been widened in advance is wound around a bobbin is often used for forming a thin prepreg.
Such a tape-shaped reinforcing fiber bundle is impregnated with a sizing agent mainly composed of an epoxy resin at the end of the production stage of the reinforcing fiber bundle, and is squeezed out by a nip roll or contacted with a dry heat roll. It is manufactured by making it dry after performing. The tape-like reinforcing fiber bundle thus manufactured takes the form of a wound body wound around a bobbin as a product form.

In the winder, the reinforcing fiber bundle is traversed in parallel to the bobbin axis so that the reinforcing fiber bundle is uniformly wound in the length direction of the bobbin. By the way, maintaining such a tape-like fiber bundle form is not considered in such an existing winder. For this reason, if a general fiber general-purpose guide is used for the general fiber winder to wind the widened reinforcing fiber bundle onto the bobbin, the reinforcing fiber bundle is pressed in the width direction when traversing. Convergence or axial twisting may occur. And the widened tape-like fiber bundle form collapses and is wound up, and cannot be applied to the above-mentioned purpose of forming a thin prepreg.
Then, the proposal for winding up such a widened tape-shaped reinforcing fiber bundle on a bobbin, maintaining the form using the existing winding machine is made | formed. Conventionally, a method of attaching a guide device as a traverse guide to an existing winder has been proposed (for example, Patent Documents 1 to 6).

The guide device described in Patent Document 1 has a plate member that is erected perpendicularly to a traverse arm that is arranged in parallel with the axis of the bobbin, and that slides along the traverse arm. Guide rolls for guiding the reinforcing fiber bundle are arranged on the upper and lower sides. The lower guide roll is arranged in parallel with the axis of the winding bobbin, and a pair of parallel guide rolls are arranged in the upper part perpendicular to the axis of the bobbin. The widened reinforcing fiber bundle is twisted by 90 ° in the axial direction between the upper and lower guide members. By passing between the upper and lower guide rolls, the tape-like reinforcing fiber bundle maintains its widened form. A guide device for a winder that can be wound around a bobbin has been proposed.
In the guide device described in Patent Document 2, a plurality of conical guides whose axes are arranged orthogonal to each other are arranged on the upper part of the plate member that reciprocates along the traverse arm, and the lower part of the plate member. Is provided with a pair of parallel guide rolls having an axis substantially parallel to the winding bobbin. The reinforcing fiber bundle is twisted by 90 ° in the axial direction by the conical guide arranged at the upper part, and the reinforcing fiber bundle is sent orthogonally to a pair of guide rolls arranged at the lower part and is wound around the same roll. A guide device for a winder wound around the bobbin has been proposed.
In the guide device described in Patent Document 3, a guide stand that reciprocates in parallel with the rotation axis of the take-up bobbin, and the rotation axis is disposed above the guide stand so as to be orthogonal to the rotation axis of the take-up bobbin. A pair of upper guide rolls, a pair of lower guide rolls whose rotating shafts are arranged in parallel with the rotating shaft of the take-up bobbin at the lower part of the guide stand, and for twisting the fiber bundle by 90 ° in the axial direction therebetween A guide device for a winder of a reinforcing fiber bundle having a conical guide roll is proposed.
In the guide device described in Patent Document 4, a guide roll having a rotation shaft arranged at a position twisted substantially perpendicular to the rotation axis of the winding bobbin, and substantially parallel to the rotation axis of the winding bobbin. There has been proposed a traverse guide device for a winder having a final guide roll having a rotation shaft disposed on the rotary shaft and having a contact length between the final guide roll and the yarn defined.
The guide device described in Patent Document 5 is a guide device that traverses when winding a reinforcing fiber bundle around a bobbin, and at least one of a plurality of guide members that guide the reinforcing fiber bundle is floatingly supported. And a guide member for a winder characterized in that the guide member is configured to be displaceable in a direction in which increase / decrease in the increase / decrease of the reinforcing fiber bundle tension associated with the traverse is reduced, and using the same Winding machines and carbon fiber bundle package manufacturing methods have been proposed.
The guide device described in Patent Document 6 includes a traverse guide for guiding a reinforcing fiber bundle and a traverse mechanism for the traverse guide, and the traverse guide is at least substantially perpendicular to the rotation axis of the winding bobbin. A guide roll having a rotation shaft disposed at a twisted position, and a free rotation final guide roll having a rotation axis direction substantially parallel to the rotation shaft of the winding bobbin. A traverse device for reinforcing fiber bundles having an adjustment mechanism for the guide position has been proposed. Further, a reinforcing fiber bundle winder using the traverse device, a reinforcing fiber bundle package manufacturing apparatus, and a manufacturing method have been proposed.
In recent years, the use of carbon fiber has come to be used for general industrial applications such as construction, civil engineering, automobiles, energy, compounds, etc., and has high strength, high elastic modulus, low cost and excellent productivity. There is a strong demand for large fiber bundles.
Japanese Patent Laid-Open No. 4-119123 JP 10-330038 A JP 2001-348166 A JP 2004-155590 A JP 2005-225644 A JP 2006-89154 A

However, the above-described technique is not always sufficient for winding a flat yarn having a large tow volume, that is, a wide tow width and a large thickness. Reinforcing fiber bundles with large tow volume tend to widen the tow width due to the amount of fibers, but from the viewpoint of strength development of composite materials using reinforcing fiber bundles, In order to prevent twisting, it was necessary to limit the toe width and thickness of the reinforcing fiber bundle.
The present invention has been made to solve such a problem. Even in the case of a reinforcing fiber having a large tow volume, a reinforcing fiber bundle widened in a tape shape can be stably wound around a bobbin without twisting. A guide device for a winder of a reinforcing fiber bundle that can be taken, a winding method of a reinforcing fiber, and a winding body of a reinforcing fiber bundle with a stable tow width.

  The guide device for a winder according to the present invention is a guide device for a winder that traverses a reinforcing fiber bundle having a fineness of 12000 to 40000 dtex and guides the bundle to the winder, and is parallel to the axial direction of the bobbin for winding. A guide stand that reciprocates, a pair of first guide roll pairs installed with the axial direction orthogonal to the traveling direction of the reinforcing fiber bundle, and downstream of the first guide roll pair A pair of second guide rolls installed on the side so that the axial direction is orthogonal to the traveling direction of the reinforcing fiber bundle and is orthogonal to the axial direction of the guide roll of the first guide roll pair The second guide roll pair is characterized in that the upstream guide roll has a cylindrical shape and the downstream guide roll has a drum shape.

  The reinforcing fiber winding method of the present invention is characterized in that, using the guide device, a reinforcing fiber bundle having a fineness of 12000 to 40000 dtex is guided to a winder and wound at a tow width variation rate of 10% or less.

  The wound bundle of reinforcing fiber bundles according to the present invention is characterized in that a reinforcing fiber bundle having a fineness of 12000 to 40000 dtex is guided to a winder and wound using the guide device.

  According to the guide device for winder of the present invention and the winding method of the reinforcing fiber bundle, even if the reinforcing fiber bundle has a large tow volume, the reinforcing fiber bundle widened in a tape shape is not twisted, It can be stably wound on a bobbin, and a wound body of reinforcing fiber bundles having a stable tow width can be obtained.

An example of an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is an enlarged view of a side surface of a guide device 10 according to an embodiment of the present invention. FIG. 2 is a schematic view of the winder 8 provided with the guide device 10 according to the embodiment of the invention.
As shown in FIG. 1, the guide device 10 includes a first guide roll pair 20 in which a guide stand 12 and first guide rolls 22 and 24 are installed and configured in the same axial direction, a second guide roll 32, 34 has the 2nd guide roll pair 30 installed and comprised by the same axial direction. On the upstream side of the guide stand 12 in the traveling direction D of the reinforcing fiber bundle, the first guide roll pair 20 is the shaft 23 of the first guide roll 22 and the shaft 25 of the first guide roll 24 is the surface of the guide stand 12. And in a direction perpendicular to the traveling direction D of the reinforcing fiber bundle. On the downstream side of the reinforcing fiber bundle traveling direction D of the guide stand 12, the second guide roll pair 30, the shaft 33 of the second guide roll 32, and the shaft 35 of the second guide roll 34 are arranged on the surface of the guide stand 12. And in a direction perpendicular to the axes 23 and 25.
A traverse guide 14 is installed between the first guide roll pair 20 and the second guide roll pair 30. A hook-shaped guide 16 having a side shape schematically shown in FIG. 5 is installed between the second guide roll 32 and the second guide roll 34.

Next, the winder 8 will be described with reference to FIG. In the winder 8, fixed guide rolls 40 and 42, a guide device 10, a winder pressure roll 52, and a shaft 51 on which the bobbin 50 is installed are sequentially installed.
The fixed guide roll 40 is installed such that the shaft 41 is parallel to the shaft 43 of the fixed guide roll 42 and orthogonal to the traveling direction D of the reinforcing fiber bundle. The guide stand 12 of the guide device 10 is erected in a direction orthogonal to the shaft 43 and the shaft 51 of the bobbin 50, and is connected to a traverse device that reciprocates between both end faces of the bobbin 50 in parallel with the shaft 51. . Thus, the first guide roll pair 20 is installed in a direction orthogonal to the shaft 43 and the shaft 51, and the second guide roll pair 30 is installed so as to be parallel to the shaft 51. The winder pressure roll 52 is installed such that the shaft 53 is parallel to the shaft 51, and the peripheral surface of the winder pressure roll 52 is in contact with the winding surface of the bobbin 50.

  The size of the guide stand 12 is not particularly limited, but is appropriately set according to the interval between the fixed guide roll 42 and the bobbin 50 and is preferably determined according to the winder 8.

The second guide rolls 32 and 34 may be any one that can guarantee sufficient strength against the tension of the reinforcing fiber bundle to be run, and examples thereof include carbon steel, stainless steel, ceramics, and aluminum. Among these, aluminum is excellent in terms of light weight, but a cutter knife may be used when winding a single yarn, and in such a case, it is preferable to use stainless steel with little damage. Furthermore, it is preferable to perform a surface treatment such as a satin finish with hard chrome from the viewpoint of preventing winding of a single yarn.
The shape of the second guide roll 32 installed on the upstream side of the second guide roll pair 30 is a cylindrical shape. As shown in FIG. 3, the columnar shape is a shape in which the peripheral surface between both end surfaces is formed with a circumference having the same radius.
The shape of the second guide roll 34 installed on the downstream side of the second guide roll pair 30 is a drum shape. As shown in FIG. 4, the drum shape is a shape in which the circumference of the circumferential surface gradually decreases in radius from both end surfaces toward the center, that is, in the axial section of the second guide roll 34. The central part is concave and curved. The degree of the depression is not particularly limited, and can be determined in consideration of the toe width of the reinforcing fiber bundle to be wound. The diameter of the second guide rolls 32 and 34 and the width of the peripheral surface are not particularly limited, and are preferably determined according to the toe width and the number of filaments of the reinforcing fiber bundle to be run.

The material of the first guide rolls 22 and 24 is the same as that of the second guide roll 32.
The shape of the first guide roll 22 installed on the upstream side of the first guide roll pair 20 is a drum shape and is the same as the second guide roll 34.
The shape of the first guide roll 24 installed on the downstream side of the first guide roll pair 20 is a cylindrical shape, which is the same as the second guide roll 32.

A method for winding the reinforcing fiber bundle using the winder 8 will be described with reference to FIG.
The reinforcing fiber bundle F is transported along the peripheral surface of the fixed guide roll 40, then changed in direction so as to be wound up by the fixed guide roll 42, and supplied to the guide device 10 in the traveling direction D. The reinforcing fiber bundle F supplied to the guide device 10 is wound around the first guide rolls 22 and 24 in this order. At this time, since the first guide rolls 22 and 24 and the fixed guide roll 42 are installed in the orthogonal axial direction, the reinforcing fiber bundle F that has passed through the fixed guide roll 42 is twisted by 90 ° in the axial direction. It is transferred while being. Thus, since the 1st guide rolls 22 and 24 are orthogonally crossed with the fixed guide roll 42, ie, are installed in the axial direction orthogonal to the traverse (traverse) direction, the reinforcing fiber bundle F is the first guide. Supplying in the traverse direction along the peripheral surfaces of the rolls 22 and 24, the reinforcing fiber bundle F is traversed in a stable state.
Next, the reinforcing fiber bundle F twisted by 90 ° is wound around the second guide rolls 32 and 34 in this order. And since the 2nd guide rolls 32 and 34 and the 1st guide roll 24 are installed in the orthogonal axial direction, the reinforcing fiber bundle F is twisted 90 degrees in the axial direction. At this time, since the second guide roll 32 has a cylindrical shape, the reinforcing fiber bundle F is uniformly tensioned in the width direction and is controlled to have a constant tow width. Subsequently, the reinforcing fiber bundle F passes through the opening 17 of the hook-shaped guide 16 and is transferred along the curved peripheral surface of the drum-shaped second guide roll 34. The reinforcing fiber bundle F is evenly distributed in the width direction of the peripheral surface of the bobbin 50 by the reciprocation of the traverse device, and is wound around the bobbin 50 while being pressed against the bobbin 50 by the winder pressure roll 52. A roll of reinforcing fiber bundle is obtained.

The reinforcing fiber bundle in the present invention refers to a carbon fiber bundle provided with a sizing agent by sizing treatment. The reinforcing fiber bundle F used in the present invention has a fineness of 12000 to 40000 dtex (decitex), more preferably 15000 to 40000 dtex. If it is within the above range, the tow width at the time of winding is stable, and twisting does not increase. The fineness dtex of the reinforcing fiber bundle F is represented by single yarn fineness (dtex) × number of filaments (number).
In order to make the fineness of the reinforcing fiber bundle F 12000 to 40000 dtex, the precursor fiber bundle of thick denier is fired as a starting material, or some precursor fiber bundles with a small number of filaments are baked in the middle of the firing process. There is a method in which yarns are combined before winding and impregnated with a sizing agent. In addition, there is a method in which a fiber bundle once wound up as a reinforcing fiber bundle is pulled out from the creel and wound while combining yarns, but is not limited to any one.

  The carbon fiber bundle is not particularly limited, and examples thereof include a bundle of thousands to tens of thousands of known carbon fiber filaments such as polyacrylonitrile (PAN), rayon, or pitch.

  The sizing treatment liquid used for the sizing treatment is not particularly limited, and a sizing treatment solution having characteristics suitable for various high-order processing can be selected. For example, in order to uniformly impregnate the yarn, it can be a solution containing a sizing agent, an emulsion, or a sizing treatment liquid in a suspended state, which is attached to a carbonized fiber bundle, and the solvent or What is necessary is just to be able to dry and remove the dispersion medium.

  The main component of the sizing agent in the sizing solution is not particularly limited, and is an epoxy resin, epoxy-modified polyurethane resin, polyester resin, phenol resin, polyamide resin, polyurethane resin, polycarbonate resin, polyetherimide resin, polyamideimide resin, polyimide. Examples thereof include resins, bismaleimide resins, urethane-modified epoxy resins, polyvinyl alcohol resins, polyvinyl pyrrolidone resins, polyether sulfone resins, and the like, and these may be used in combination of two or more.

  The toe width of the reinforcing fiber bundle F is not particularly limited, and can be determined according to the tow width required for the wound body of the reinforcing fiber bundle.

  The first guide roll pair 20 and the second guide roll pair 30 are at positions where the central axes are spatially twisted. However, it is necessary to adjust so that the reinforcing fiber bundle F is transferred along the central portion of the peripheral surface in any guide roll. When the reinforcing fiber bundle F passes through a position deviated from the center portion of the peripheral surface of the guide roll, a force for narrowing the toe width of the reinforcing fiber bundle F acts, and the traveling can be stabilized while the tow width is widened. It is because it becomes impossible.

According to the guide device 10 described above, the second guide roll pair 30 is a combination of a cylindrical guide roll and a drum-shaped guide roll, so that the tow volume of 12000 to 40000 dtex is large without being twisted by the traverse. The reinforcing fiber bundle can be wound up without being twisted with a wide tow width.
Furthermore, by making the first guide roll pair 20 a combination of a drum shape and a cylindrical shape, the traverse cancels when the reinforcing fiber bundle passes through the two first guide rolls 22 and 24 having different circumferential surface shapes. Is done. In the first guide roll pair 20, the first guide roll 22 located on the upstream side has a drum shape, so that the reinforcing fiber bundle can follow the movement of the traverse without being twisted. And since the 1st guide roll 24 located in the downstream is 1st guide roll 24 in the 1st guide roll pair 20, it can maintain the form of the reinforced fiber bundle expanded more stably.

The wound body of the bundle of reinforcing fibers produced by being guided to the winder 8 using the guide device 10 does not have a twist at the stage of being wound, and thus has a very stable winding shape. The reinforcing fiber bundle fed out from the winding body of the reinforcing fiber bundle is wide and has a tow width fluctuation rate of 10% or less, and the reinforcing fiber bundle can be supplied with an extremely stable tow width. For this reason, it can be applied to the production of molded products by reinforcing fiber prepregs, drum winds and filament winds without performing fiber opening or the like.
Here, “having no twist” means that the reinforcing fiber bundle is not twisted at all, or the twist per 1 m of the reinforcing fiber bundle is 0.4 turns or less. The variation rate is a value obtained by measuring 100 tow widths every 25 cm and calculating the following equation (1).

  Fluctuation rate of tow width (%) = (standard deviation of tow width / average value of tow width) × 100 (1)

  The second guide rolls 32 and 34 in the above-described embodiment are installed side by side with the shaft 33 and the shaft 35 parallel to the shaft 51 and substantially along the shape of the standing guide stand 12 in the length direction. Has been. That is, the second guide roll 32 and the second guide roll 34 are arranged side by side in the vertical direction so that a part of the peripheral surface thereof faces the peripheral surface of the bobbin 50. In such an arrangement of the second guide rolls 32, 34, the reinforcing fiber bundle F transferred from the first guide roll pair 20 is transferred along the peripheral surface of the second guide roll 32 on the bobbin 50 side, The traveling direction is changed so as to be wound around the second guide roll 34, and the second guide roll 34 is transported along the peripheral surface of the second guide roll 34 opposite to the bobbin 50. The reinforcing fiber bundle F <b> 1 transferred along the peripheral surface of the second guide roll 34 is pressed by the bobbin 50 so as to be wound around the winder pressure roll 52, and wound around the bobbin 50.

  However, the method of winding the reinforcing fiber bundle around the second guide roll pair 30 is not limited to this. For example, the reinforcing fiber bundle is alternately wound around the second guide rolls 32 and 34 as in the embodiment of FIG. Also good. In the embodiment of FIG. 6, the reinforcing fiber bundle F <b> 1 transferred from the first guide roll pair 20 is first transferred along the peripheral surface of the second guide roll 32 opposite to the bobbin 50, and then the second guide roll 32. The traveling direction is changed so as to be wound around the guide roll 34, and the second guide roll 34 is transported along the peripheral surface of the bobbin 50 side. Then, the reinforcing fiber bundle F <b> 1 transferred along the peripheral surface of the second guide roll 34 is pressed against the bobbin 50 by the winder pressure roll 52 and is wound around the bobbin 50. Thus, by reinforcing the reinforcing fiber bundle F1 around the second guide roll pair 30, the reinforcing fiber bundle F1 supplied from the first guide roll pair 20 is wound around the second guide roll 32. The tension applied to F1 and the tension applied to the reinforcing fiber bundle F1 when wound around the second guide roll 34 from the second guide roll 32 are moderately relaxed. As a result, the winder 8 can wind the reinforcing fiber bundle F1 around the bobbin 50 more stably with a wider tow width.

  In the above-described embodiment, the winder 8 is a type of winder in which the bobbin 50 is installed perpendicular to the traveling direction of the reinforcing fiber bundle F, and no twist is applied to the reinforcing fiber bundle F when the bobbin 50 is wound. However, the guide device 10 is not limited to the winder 8. For example, the present invention can also be applied to a winder of a type in which a bobbin is installed in parallel with the traveling direction of the reinforcing fiber bundle F and a 90 ° twist is applied to the reinforcing fiber bundle during winding. In this case, the guide device 10 is installed so that the upper fixed guide rolls 40 and 42 and the first guide rolls 22 and 24 of the guide device 10 are parallel to each other, and the fixed guide rolls 40 and 42 and the guide device 10 are Between them, the reinforcing fiber bundle F is not twisted.

  The guide device for a winder according to the present invention is suitable for winding a widened flat tape-shaped reinforcing fiber bundle, particularly a carbon fiber bundle. Of course, an aramid fiber bundle, a graphitized fiber bundle, and a glass fiber are used. The present invention can also be applied to various reinforcing fiber bundles such as bundles.

  EXAMPLES Hereinafter, although an Example is given and this invention is demonstrated concretely, it is not limited to an Example.

<Tow width and rate of change at the time of winding>
Without applying tension, the reinforcing fiber bundle was continuously drawn out from the wound body of the reinforcing fiber bundle, and the tow width every 25 cm was measured at 100 points. The average value was calculated using 100 measured values. Moreover, the fluctuation rate of the tow width was calculated from the following equation (1).

  Fluctuation rate of tow width (%) = (standard deviation of tow width / average value of tow width) × 100 (1)

Example 1
Similar to the guide device 10 shown in FIG. 6, the second guide roll located on the upstream side of the second guide roll pair is a cylindrical guide roll (FIG. 3), and the second guide roll located on the downstream side is the second guide roll. A guide device A having a drum-shaped guide roll (FIG. 4) was produced. This guide device A was installed in an EKTW type winder manufactured by Kozu Seisakusho and used as a winder A.
Using a winder A, a reinforcing fiber bundle having a fineness of 33000 dtex and a filament number of 50000 was wound around a paper winding bobbin (paper tube) to obtain a wound body A-1 of the reinforcing fiber bundle. Here, a paper tube having an inner diameter of 82 mm and a length of 280 mm was used.
About the wound body A-1 of the obtained reinforcing fiber bundle, the tow width and the fluctuation rate were measured, and the results are shown in Table 1.

(Example 2)
Except for using a reinforcing fiber bundle having a fineness of 15883 dtex and a filament number of 24,000, a wound body A-2 of the reinforcing fiber bundle was produced in the same manner as in Example 1, and the tow width and the variation rate were measured. The results are shown in Table 1.

(Comparative Example 1)
A reinforced fiber bundle wound body B is manufactured in the same manner as in Example 1 except that the second guide roll located upstream of the second guide roll pair is a drum-shaped guide roll 60 (FIG. 7). Tow width and rate of variation were measured. The results are shown in Table 1. Note that the drum shape is a shape in which the circumference of the circumferential surface gradually increases in radius from both end surfaces toward the center, that is, in the axial cross section of the guide roll 60 as shown in FIG. It is a shape in which the central part is swollen rather than the surface.

(Comparative Example 2)
Except for using a reinforcing fiber bundle having a fineness of 9889 dtex and a filament number of 15000, a wound body C of the reinforcing fiber bundle was produced in the same manner as in Example 1, and the tow width and variation rate were measured. The results are shown in Table 1.

(Comparative Example 3)
Except for using a reinforcing fiber bundle having a fineness of 9889 dtex and a filament number of 15000, a wound body D of the reinforcing fiber bundle was produced in the same manner as in Comparative Example 1, and the tow width and the variation rate were measured. Show.

(Comparative Example 4)
Except for using a reinforcing fiber bundle having a fineness of 15833 dtex and a filament number of 24,000, a wound body E of the reinforcing fiber bundle was produced in the same manner as in Comparative Example 1, and the tow width and variation rate were measured. The results are shown in Table 1.

In Example 1 in which the second guide roll pair is a combination of a cylindrical shape and a drum shape, a roll of reinforcing fiber bundles having a wide tow width of 10.2 mm and a fluctuation rate of 6.9% and a stable tow width. was gotten. Moreover, there was little twist of winding A-1 of the obtained reinforcing fiber bundle, and it was a stable winding shape.
In Example 2 in which a reinforcing fiber bundle having a fineness of 15883 dtex was used as the reinforcing fiber bundle, a roll of the reinforcing fiber bundle having a stable tow width with a wide tow width of 8.6 mm and a fluctuation rate of 8.8% was obtained. It was. Moreover, there was little twist of winding A-2 of the obtained reinforcing fiber bundle, and it was a stable winding shape.
On the other hand, in Comparative Example 1 in which the second guide roll pair was a combination of a drum shape and a drum shape, a reinforcing fiber bundle having the same fineness as in Example 1 was used, but although the tow width was as wide as 10.4 mm, The variation rate was over 10%. The wound body B of the obtained reinforcing fiber bundle was very twisted and the winding shape was unstable.
In Comparative Example 2 in which the second guide roll pair is a combination of a cylindrical shape and a drum shape, and a reinforcing fiber bundle having a fineness of less than 12000 dtex is used, the tow width becomes extremely narrow and the variation rate is 16.5%, which is the tow width. Was unstable. The wound body C of the obtained reinforcing fiber bundle was very twisted and the winding shape was unstable.
In Comparative Example 3 in which the second guide roll pair is a combination of a drum shape and a drum shape and a reinforcing fiber bundle having a fineness of less than 12000 dtex is used, the variation rate is 6.3%, and the shape of the wound body D of the reinforcing fiber bundle Was stable. On the other hand, in Comparative Example 4 in which the fineness was 15833 dtex, the tow width was widened, but the variation rate was 13.2%, and a stable tow width could not be obtained. In addition, the wound body E of the obtained reinforcing fiber bundle was very twisted and the winding shape was unstable.

It is an enlarged view of the guide device side surface concerning the embodiment of the present invention. It is a schematic diagram which shows the winder with which the guide apparatus concerning embodiment of this invention was attached. It is a side view of the column-shaped 2nd guide roll concerning embodiment of this invention. It is a side view of the drum-shaped 2nd guide roll concerning embodiment of this invention. It is a top view of the hook-shaped guide of the guide apparatus of embodiment of this invention. It is a schematic diagram which shows the winder with which the guide apparatus concerning embodiment of this invention was attached. It is a side view of the drum-shaped guide roll used for the comparative example.

Explanation of symbols

8 Winding Machine 10 Guide Device 12 Guide Stand 20 First Guide Roll Pair 22, 24 First Guide Roll 30 Second Guide Roll Pair 32, 34 Second Guide Roll 50 Bobbin

Claims (3)

A guide device for a winder that traverses a reinforcing fiber bundle having a fineness of 12000 to 40000 dtex and guides the bundle to a winder,
A guide stand that reciprocates parallel to the axial direction of the bobbin for winding;
The guide stand includes a pair of first guide roll pairs installed with the axial direction orthogonal to the traveling direction of the reinforcing fiber bundles, and the downstream side of the first guide roll pair in the traveling direction of the reinforcing fiber bundles. A pair of second guide rolls installed perpendicular to the axial direction of the first guide roll pair and perpendicular to the axial direction of the guide roll of the first guide roll pair,
The guide device for the winder, wherein the second guide roll pair has an upstream guide roll having a cylindrical shape and a downstream guide roll having a drum shape.   A method for winding a reinforcing fiber bundle, wherein the reinforcing fiber bundle having a fineness of 12000 to 40000 dtex is guided to a winder using the guide device according to claim 1 and wound at a tow width variation rate of 10% or less.   A wound bundle of reinforcing fiber bundles in which a reinforcing fiber bundle having a fineness of 12000 to 40000 dtex is guided to a winder and wound up at a tow width variation rate of 10% or less using the guide device according to claim 1.

Images