JP5574630B2 - Guide device, continuous fiber bundle winder, continuous fiber bundle manufacturing method, and carbon fiber bundle - Google Patents

Description

  The present invention relates to a guide device for winding a tape-like continuous fiber bundle having a flattened cross-sectional shape on a bobbin, a winder equipped with the guide device, and a continuous fiber bundle using the winder. The present invention relates to a production method and a carbon fiber bundle obtained by the method. In particular, a guide device capable of stably winding the tape-shaped continuous fiber bundle while maintaining the widened form thereof, a winder equipped with the guide device, and a method for producing a continuous fiber bundle using the winder And a carbon fiber bundle obtained by the method.

  Carbon fiber, glass fiber, aramid fiber or the like is used as a reinforcing material in the fiber reinforced composite material. Among them, carbon fiber is excellent in specific strength, specific elastic modulus, heat resistance, chemical resistance, etc., and is used as a reinforcing material for fiber reinforced composite materials for aircraft applications, sports applications such as golf shafts and fishing rods, and general industrial applications. Yes. In order to obtain a carbon fiber having a high strength and a high elastic modulus, a carbon fiber precursor yarn bundle that has few yarn breakage and fluff generation and excellent quality is required.

  Carbon fibers are rarely used alone because of their form and properties, and most of them are made by impregnating a resin such as an epoxy resin after generally arranging a plurality of fiber bundles in parallel (this is generally called a prepreg). .), And then winding the product in a cylindrical shape or covering the product, the resin is cured to produce a fiber-reinforced plastic product.

  Since carbon fiber is lighter and stronger than other reinforcing fiber materials, in order to make further use of this property, prepregs in which carbon fiber is impregnated with a resin such as epoxy are also being studied for further weight reduction. ing.

  In order to reduce the weight of the carbon fiber prepreg, it is necessary to spread the carbon fiber bundle thinly. For this purpose, each manufacturing company that manufactures the prepreg has made various efforts.

  However, if a reinforcing fiber bundle such as a carbon fiber bundle supplied in the manufacturing process of the prepreg is preliminarily spread to a certain width, that is, in a tape shape in which the reinforcing fiber bundle wound around the bobbin is widened. If it exists, the operation | work of expanding the width | variety of a reinforced fiber bundle in the manufacturing process of a prepreg can be omitted. Therefore, 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.

  In recent years, attempts have been made to apply a fiber bundle having a large number of filaments to various molding methods such as drum wind, filament wind, and pultrusion. Also for these molding methods, it is preferable that the fiber bundle is in the form of a tape in which the fiber bundle is widened, and it is more preferable that the twist is small and the fluctuation of the width of the fiber bundle is small.

  Such a tape-shaped fiber bundle was impregnated with a sizing agent mainly composed of an epoxy resin or the like at the end of the production stage of the fiber bundle, and squeezed out by a nip roll or contacted with a dry heat roll. Then, it is manufactured by drying. The tape-like fiber bundle manufactured in this way takes the form of a wound body wound around a bobbin as a product form.

  In the winding device, the fiber bundle is traversed parallel to the axis of the bobbin so that the fiber bundle is uniformly wound in the length direction of the bobbin. However, it is not considered to maintain a tape-like fiber bundle form in the existing winding device. For this reason, when winding the widened fiber bundle onto the bobbin using the winding device for general fibers, a general-purpose guide for general fibers specified by the manufacturer is used. It is pressed and converged, or the fiber bundle is twisted in the axial direction. It becomes impossible to adapt to the purpose.

  Therefore, a proposal has been made to wind up such a widened tape-shaped fiber bundle on a bobbin while maintaining its flat form using an existing winding device. Conventionally, for example, as described in Patent Documents 1 to 3, a method of attaching a guide device as a traverse guide to an existing winding device has been proposed.

  The guide device described in Patent Document 1 has a plate-shaped yarn guide fixing base which is erected perpendicularly to a traverse arm arranged in parallel to the axis of the bobbin and slides along the traverse arm. A guide roll for guiding the fiber bundle is disposed above and below the yarn guide fixing base. The lower guide roll is composed of a single roll arranged parallel to the axis of the take-up bobbin, and the guide roll arranged on the upper part of the yarn guide fixing base is a pair of parallel guide rolls orthogonal to the axis of the bobbin. Consists of. The widened fiber bundle is twisted by 90 ° between the upper and lower guide rolls in the axial direction. By passing between the upper and lower guide rolls, the tape-like fiber bundle is retained in its widened form in the bobbin. Can be rolled up.

  In the guide device described in Patent Document 2, a plurality of cones that are erected perpendicularly to the traverse arm and whose axis is arranged vertically above and below the plate member that reciprocates along the traverse arm. The plate member has a pair of upper and lower parallel guide rolls having an axis substantially parallel to the winding bobbin. The fiber bundle is twisted by 90 ° in the axial direction by the conical guide arranged at the upper part, and the fiber bundle is wound around the same roll between a pair of guide rolls arranged at the lower part to maintain the widened form And then wound around the bobbin.

  In the guide device described in Patent Document 3, a set of first and first pairs are arranged on the traveling path of the fiber bundle, and the axes on which the fiber bundle is twisted and guided are twisted in space. 2 guides. Further, a parallel guide having an axis parallel to the bobbin for twisting back the twisted fiber bundle and introducing and guiding it to the bobbin is provided. The first guide is a flat guide or a conical guide, and the second guide is a conical guide. The traveling position of the continuous fiber bundle and the width of the continuous fiber bundle are stabilized and the parallel guide is wound around the bobbin stably.

Japanese Patent Laid-Open No. 4-119123 JP 10-330038 A JP 2005-255414 A

  On the other hand, many fiber bundles are often processed by being continuously unwound after being wound on a paper tube to form a package. At that time, there is a problem that the number of yarn breaks estimated to be caused by friction between the fiber bundles is large. When the number of yarn breaks increases, the tow breaks eventually, causing a problem in process passability when used in a subsequent process. As a result of intensive studies, the present inventors need to stably control the toe width of the continuous fiber bundle to a certain width in order to improve the processability of the post-processing of the continuous fiber bundle. I found.

  An object of the present invention is to provide a guide device that has good process passability in post-processing and has a small tow width variation rate and can be stably wound around a bobbin, a winder including the guide device, and a winding device It is providing the manufacturing method of the continuous fiber bundle using a take-up machine, and the carbon fiber bundle obtained by the method.

The present invention is a guide device used when winding a continuous fiber bundle around a bobbin,
A pair of first guides and second guides arranged on a traveling path of the continuous fiber bundles and twisting and guiding the continuous fiber bundles, the axes of which are twisted relative to each other in space;
A parallel guide disposed on the downstream side of the traveling path of the set of guides, for twisting back the twisted continuous fiber bundle and introducing the twisted continuous fiber bundle into a bobbin; and the first guide and the second guide Is a conical guide, and the parallel guide is a guide device in which a part thereof is a concavely curved guide.

  In addition, the present invention is a continuous fiber bundle winder including the above guide device and a bobbin, wherein an axis of a parallel guide included in the guide device is parallel to an axis of the bobbin. Moreover, this invention is a manufacturing method of the continuous fiber bundle which winds up a continuous fiber bundle using the winder. Moreover, this invention is a carbon fiber bundle obtained by winding up the continuous carbon fiber bundle by the manufacturing method.

  According to the present invention, the processability in post-processing is good, and the variation rate of the tow width is small, so that it can be stably wound on the bobbin. In other words, by simply attaching a guide device to an existing winder, the carbon fiber bundle widened in the form of a tape to be supplied can be stably wound around the bobbin without twisting, and the carbon fiber bundle can be It can be wound around the bobbin in a state where it is wider than the width at the time of supply.

It is a side view which shows roughly the winding state of the continuous fiber bundle by the winder equipped with the guide device according to the present invention. It is a front view which shows roughly arrangement | positioning of the guide apparatus of FIG. It is a top view which shows arrangement | positioning of the guide apparatus of FIG. 1 schematically. It is a front view which shows the outline of the traverse state of the continuous fiber bundle by the winding machine of FIG. It is a side view of the parallel guide roll which has a concave curved part. It is a side view of the parallel guide roll which does not have a concave curved part.

  Hereinafter, preferred embodiments of the present invention will be specifically described with reference to the drawings.

  As a carbon fiber bundle, usually, an acrylic raw material fiber is heated in air to make it flame resistant, and then heated in nitrogen to be carbonized, and a pitch such as petroleum is used as a raw material. There are pitch-based carbon fiber bundles. The present invention is applicable when winding any carbon fiber bundle. Moreover, it is applicable also when winding fiber bundles other than a carbon fiber bundle.

  The tape-like carbon fiber bundle can be obtained by impregnating the fiber bundle with a sizing agent and then contact drying with a heating roll, as disclosed in, for example, Japanese Patent Publication No. 6-65787. After forming, the carbon fiber bundle is wound around a bobbin by a winder and sent to a subsequent manufacturing process such as a prepreg.

  FIG. 1 is a side view schematically showing a winding state of a continuous fiber bundle by a winding machine equipped with the guide device of the present invention. 2 and 3 are a front view and a top view schematically showing the arrangement of the guide device. FIG. 4 is a front view showing an outline of a traverse state of the continuous fiber bundle by the winder of FIG. 1. FIG. 5 is a side view of a parallel guide roll having a concavely curved portion. FIG. 6 is a side view of a parallel guide roll having no concavely curved portion.

  As shown in FIG. 1, a first fixed guide roll 2 and a second fixed guide roll 3 having an axis parallel to the axis 1a of the bobbin 1 are provided above the winder body.

  The guide device 9 has three guides attached to the frame 8 as shown in FIG. 2, and is mounted on a well-known traverse mechanism (not shown) that reciprocates in parallel with the axis 1a of the bobbin 1 to reciprocate together. To do. The first guide 4 and the second guide 5 included in the guide device 9 are arranged on the traveling path of the continuous fiber bundle and constitute a set of guides for twisting and guiding the continuous fiber bundle. The axes 5a of the two guides 5 are arranged so as to be twisted relative to each other as shown in FIG. 3, and are orthogonal to the axis 1a of the bobbin 1 when viewed from the axis direction of the bobbin 1 as shown in FIG. Is arranged. Another guide included in the guide device 9 is arranged on the downstream side of the continuous fiber bundle supply of the second guide 5, and the parallel guide roll 6 that twists back the continuous fiber bundle and introduces and guides it to the bobbin. The axis of the bobbin 1 is arranged in parallel to the axis 1a. Note that a pressure guide roll is disposed immediately before the bobbin 1.

  The first guide 4 is a conical guide. As the first guide 4, a steel-finished one, a mirror-finished one, a one coated with a resin such as tetrafluoroethylene, or the like can be used. As shown in FIG. 2, the first guide 4 is arranged in a direction perpendicular to the axis of the bobbin. Further, the first guide 4 is preferably one having a hypotenuse length of 20 to 120 mm, more preferably 30 to 100 mm, depending on the fineness of the continuous fiber bundle to be supplied or the width of the continuous fiber bundle. The diameter is preferably 10 to 50 mm, more preferably 20 to 40 mm.

  The second guide 5 is a conical guide. The material of the second guide 5 can be the same as that of the first guide 4. The second guide 5 is disposed so that its axis is twisted with the first guide 4. Further, the second guide 5 is disposed such that its axis is orthogonal to the axis 1a of the bobbin 1 when viewed from the axis direction of the bobbin 1 as shown in FIG. Further, the second guide 5 is installed such that its axis 5a is at an angle of 90 ° or less with respect to the axis 1a of the bobbin 1 when viewed from the supply direction of the continuous fiber bundle as shown in FIG. The conical apex angle of the second guide 5 is preferably set to 45 ° or less. From the viewpoint of the arrangement space of the bobbins 1, the second guide 5 has a bottom diameter of 10 to 50 mm in order to ensure a sufficient length of the hypotenuse where the continuous fiber bundle contacts in a narrow space. It is preferably 20 to 40 mm, more preferably 20 to 100 mm, and more preferably 30 to 80 mm.

  The parallel guide roll 6 further twists the continuous fiber bundle supplied via the second guide 5 disposed above in a direction parallel to the bobbin 1. The parallel guide roll 6 is also supported by support means common to the first guide 4 and the second guide 5, and is reciprocated in a direction parallel to the axis 1a of the bobbin 1 by a traverse mechanism (not shown). The material of the parallel guide roll 6 can be the same as that of the first guide 4. From the viewpoint of the bobbin arrangement space in the winding part, the parallel guide roll 6 preferably has a diameter of 10 mm to 40 mm, and more preferably 15 mm to 30 mm. Moreover, the roll surface length of the parallel guide roll 6 is preferably 20 mm to 100 mm, and more preferably 30 mm to 80 mm in consideration of space factors such as attachment to the traverse mechanism.

  Usually, as the parallel guide roll 6, a single cylindrical roll having no concavely curved portion as shown in FIG. 6 is used. However, in the present invention, in order to reduce the toe width, a guide in which a part of the parallel guide roll is curved into the concave portion is used. By reducing the tow width by passing the curved portion in the recess, there is an effect that the occurrence of yarn breakage is reduced when the wound continuous fiber bundle is unwound.

  The curvature radius R of the concavely curved portion may be appropriately changed depending on the number of tows of the continuous fiber bundle to be manufactured, but the curvature radius R is preferably 5 mm or more and 15 mm or less. By setting the radius of curvature R to 5 mm or more, the continuous fiber bundle is less likely to be twisted or bent, the deterioration of the wound package is suppressed, and the fiber bundle spreads uniformly when used in post-processing. Moreover, the effect of reducing a tow | toe width | variety can be achieved because the curvature radius R shall be 15 mm or less.

  The continuous fiber bundle is twisted by 90 ° with respect to the axis in the supply direction by the pair of first guide 4 and second guide 5 and the parallel guide roll 6 and then returned to 0 ° or the same. In order to twist 90 degrees in the direction, the direction of the hypotenuse contacting the continuous fiber bundle is preferably set to 30 ° to 60 ° with respect to the axis 1a of the bobbin 1, and more preferably set to 40 to 50 °. preferable.

  At the end of the production stage of the fiber bundle, a sizing agent mainly composed of an epoxy resin or the like is impregnated, and the squeezing is performed by squeezing with a nip roll or contacting with a dry heat roll, and then supplied to the winding unit. This continuous fiber bundle is wound around the upper first fixed guide roll 2 and the upper second fixed guide roll 3 installed at the upper part of the winding part, and then the axes are in a positional relationship in which the axes are twisted with respect to each other in space. The first guide 4 and the second guide 5 of the set are alternately wound around and sent to the bobbin. At this time, the first guide 4 and the second guide 5 are traversed in parallel with the bobbin axis 1a, and the first guide 4 is a conical guide whose axis is perpendicular to the bobbin axis, that is, orthogonal to the traverse direction. Therefore, the continuous fiber bundle is supplied along the roll peripheral surface of the first guide 4 even when moving in parallel with the axis of the bobbin, and the continuous fiber bundle is traversed in a stable state and is tape-shaped. The form can be maintained.

  The continuous fiber bundle, particularly the carbon fiber bundle, obtained as described above is suitably used for general industrial applications such as automobile applications and building materials that are required to have high quality and high quality.

  Specific examples of the present invention will be described below, but the present invention is not limited to these examples.

<Tow width and variation rate on carbon fiber bobbin package>
A carbon fiber bundle was continuously drawn out from the carbon fiber bobbin package so as not to be twisted without applying tension, and a tow width every 25 cm was measured at 100 points, and an average value thereof was calculated. Moreover, the fluctuation rate of the tow width was calculated from the following formula (1).

Fluctuation rate of tow width (%) = (standard deviation of tow width / average value of tow width) × 100 (1)
<Tow width and rate of change during unwinding>
The carbon fiber tow width immediately after unwinding from the carbon fiber bobbin at a speed of 5 m / min and a tension of 150 gf per 10000 dtex (1.47 N) was measured for 50 m, and the average value was calculated. The tow width variation rate was calculated from the above equation (1).

<Stability of tow width>
The stability evaluation of the tow width was determined as follows.
○: The variation rate of the tow width on the carbon fiber bobbin package is 10% or less, and the variation rate of the tow width at the time of unwinding is 10% or less.
X: The tow width variation rate on the carbon fiber bobbin package or the tow width variation rate at the time of unwinding exceeds 10%.

<Unraveling>
The carbon fiber bundle package was unwound at a speed of 100 m / min under a tension of 150 gf (1.47 N) per 10,000 dtex, and occurrence of yarn breakage and tow breakage was confirmed. The unraveling evaluation was determined as follows.
○: Neither thread breakage nor tow breakage during unwinding.
X: During the unwinding, there was one or more thread breaks or tow breaks, and the unwinding was interrupted.

[Experimental Example 1]
An acrylic fiber bundle having a fineness of 60,000 dtex and a filament number of 60,000 was subjected to heat treatment at a temperature of 220 ° C. to 260 ° C. to obtain a flame resistant fiber bundle. This flame-resistant fiber bundle is pre-carbonized in a nitrogen atmosphere at 700 ° C., then carbonized in a nitrogen atmosphere at 1,350 ° C., and subjected to electrolytic oxidation treatment and sizing treatment to obtain a carbon fiber bundle. It was.

  A guide device 9 shown in FIGS. 1 and 2 was manufactured and used as a guide device for a KTW-C winder (trade name) manufactured by Kozu Seisakusho. At this time, as shown in FIG. 5, a parallel guide roll having a concavely curved portion was used, and the radius of curvature R of the concavely curved portion was 13.3 mm. The guide device 9 was attached to the winder, and the carbon fiber bundle was wound around a paper winding bobbin (paper tube) by the winding unit. A paper tube having a diameter of 82 mm and a length of 280 mm was used, and the traverse width was 254 mm. The supply speed of the carbon fiber bundle to the winding unit was 3 m / min, and the carbon fiber bundle was wound up to 1,000 m on the paper tube.

  When the tow width on the obtained bobbin package was measured, it was 10.4 mm, and the variation rate of the tow width was 7.5%. Further, when the tow width when the carbon fiber bundle was unwound from the wound paper tube at a speed of 5 m / min was measured, the average value of the width was 15.2 mm, and the variation rate of the tow width was 4. It was 9%. Even when the carbon fiber bundle was pulled out 1,000 m, the number of occurrences of yarn breakage and tow breakage was 0, and the process passability was good.

[Experiment 2]
The carbon fiber bundle was wound up in the same manner as in Experimental Example 1 except that the radius of curvature R of the portion of the parallel guide roll curved in the concave shape was 8.1 mm. When the tow width on the obtained bobbin package was measured, it was 9.5 mm, and the variation rate of the tow width was 6.1%. Further, when the tow width when the carbon fiber bundle was unwound from the wound paper tube at a speed of 5 m / min was measured, the average value of the width was 13.1 mm, and the variation rate of the tow width was 7. 1%. Even when the carbon fiber bundle was pulled out 1,000 m, the number of occurrences of yarn breakage and tow breakage was 0, and the process passability was good.

[ Comparative Example 3]
As shown in FIG. 6, the carbon fiber bundle was wound up in the same manner as in Experimental Example 1 except that a parallel guide roll having no concavely curved portion was used. When the tow width on the obtained bobbin package was measured, it was 12.0 mm, and the variation rate of the tow width was 6.2%. Moreover, when the tow width was measured when the carbon fiber bundle was unwound from the wound paper tube at a speed of 5 m / min, the average value of the width was 18.0 mm, and the variation rate of the tow width was 6. 2%. When the carbon fiber bundle was pulled out, thread breakage occurred.

[ Comparative Example 4]
The carbon fiber bundle was wound up in the same manner as in Experimental Example 1 except that the radius of curvature R of the portion of the parallel guide roll curved in the concave shape was set to 4.5 mm. When the tow width on the obtained bobbin package was measured, it was 7.5 mm, and the variation rate of the tow width was 12.5%. Further, when the tow width when the carbon fiber bundle was unwound from the wound paper tube at a speed of 5 m / min was measured, the average value of the width was 9.1 mm, and the variation rate of the tow width was 12. 1%. Even when the carbon fiber bundle was pulled out 1,000 m, the number of occurrences of thread breakage and tow breakage was 0. However, the state of the wound package was poor, and the fibers did not spread uniformly when used in post-processing.

[ Comparative Example 5]
The carbon fiber bundle was wound up in the same manner as in Experimental Example 1 except that the radius of curvature R of the concave portion of the parallel guide roll was set to 17.0 mm. When the tow width on the obtained bobbin package was measured, it was 11.9 mm, and the variation rate of the tow width was 6.1%. Further, when the tow width when the carbon fiber bundle was unwound from the wound paper tube at a speed of 5 m / min was measured, the average value of the width was 17.9 mm, and the variation rate of the tow width was 7. 1%. When the carbon fiber bundle was pulled out, thread breakage occurred.

[Experimental Example 6]
An acrylic fiber bundle having a fineness of 14,400 dtex and a filament number of 12,000 was subjected to heat treatment at a temperature of 220 ° C. to 260 ° C. to obtain a flame resistant fiber bundle. This flame-resistant fiber bundle is pre-carbonized in a nitrogen atmosphere at 700 ° C., then carbonized in a nitrogen atmosphere at 1,350 ° C., and subjected to electrolytic oxidation treatment and sizing treatment to obtain a carbon fiber bundle. It was.

  The carbon fiber bundle obtained above was wound up in the same manner as in Experimental Example 1 except that the radius of curvature R of the concave portion of the parallel guide roll was 8.0 mm. When the tow width on the obtained bobbin package was measured, it was 6.5 mm, and the variation rate of the tow width was 6.3%. Further, when the tow width when the carbon fiber bundle was unwound from the wound paper tube at a speed of 5 m / min was measured, the average value of the width was 6.7 mm, and the variation rate of the tow width was 3. It was 9%. Even when the carbon fiber bundle was pulled out 1,000 m, the number of occurrences of yarn breakage and tow breakage was 0, and the process passability was good.

[Experimental Example 7]
An acrylic fiber bundle having a fineness of 28,800 dtex and a filament number of 24,000 was subjected to heat treatment at a temperature of 220 ° C. to 260 ° C. to obtain a flame resistant fiber bundle. This flame-resistant fiber bundle is pre-carbonized in a nitrogen atmosphere at 700 ° C., then carbonized in a nitrogen atmosphere at 1,350 ° C., and subjected to electrolytic oxidation treatment and sizing treatment to obtain a carbon fiber bundle. It was.

  The carbon fiber bundle obtained above was wound up in the same manner as in Experimental Example 1 except that the radius of curvature R of the concave portion of the parallel guide roll was 8.0 mm. When the tow width on the obtained bobbin package was measured, it was 8.6 mm, and the variation rate of the tow width was 8.8%. Further, when the tow width when the carbon fiber bundle was unwound from the wound paper tube at a speed of 5 m / min was measured, the average value of the width was 9.7 mm, and the variation rate of the tow width was 9. 0%. Even when the carbon fiber bundle was pulled out 1,000 m, the number of occurrences of yarn breakage and tow breakage was 0, and the process passability was good.

[Experimental Example 8]
An acrylic fiber bundle having a fineness of 57,600 dtex and a filament number of 48,000 was subjected to heat treatment at a temperature of 220 ° C. to 260 ° C. to obtain a flame resistant fiber bundle. This flame-resistant fiber bundle is pre-carbonized in a nitrogen atmosphere at 700 ° C., then carbonized in a nitrogen atmosphere at 1,350 ° C., and subjected to electrolytic oxidation treatment and sizing treatment to obtain a carbon fiber bundle. It was.

  The carbon fiber bundle obtained above was wound up in the same manner as in Experimental Example 1 except that the radius of curvature R of the portion of the parallel guide roll curved in the concave shape was 12.5 mm. When the tow width on the obtained bobbin package was measured, it was 10.4 mm, and the variation rate of the tow width was 6.8%. Further, when the tow width when the carbon fiber bundle was unwound from the wound paper tube at a speed of 5 m / min was measured, the average value of the width was 14.7 mm, and the variation rate of the tow width was 5. 0%. Even when the carbon fiber bundle was pulled out 1,000 m, the number of occurrences of yarn breakage and tow breakage was 0, and the process passability was good.

The results of the above Experimental Examples 1 , 2, 6 to 8 and Comparative Examples 3 to 5 are summarized in Table 1. In Table 1, the results of Example Nos. “3 to 5” indicate the results of “Comparative Examples 3 to 5”.

  As described above, the guide device of the present invention stably imparts the twist of 90 ° in the axial direction while maintaining the shape of the carbon fiber bundle by the pair of the first guide and the second guide. By narrowing the tow width with a concave roll, a carbon fiber bundle that has been expanded into a tape shape can be wound in a stable form, and a carbon fiber bundle with good processability in post-processing can be produced. It becomes.

  In addition, since the width of the carbon fiber bundle unwound from the wound body wound on the bobbin by the winder of the present invention is stable, a molded product made of carbon fiber prepreg, drum wind and filament wind is manufactured. It becomes possible to do.

1 Bobbin 1a Bobbin axis 2 Upper first fixed guide roll 3 Upper second fixed guide roll 4 First guide 4a First guide axis 5 Second guide 5a Second guide axis 6 Parallel guide roll 7 Pressure roll 8 Frame 9 Guide device R Radius of curvature φ Diameter of parallel guide roll φ ′ Diameter of shaft of parallel guide roll

Claims (3)

A guide device used when winding a continuous carbon fiber bundle around a bobbin,
Disposed on the traveling path of the carbon fiber bundle in which the successive said to twist guide the carbon fiber bundle to be continuous, a first guide and a second guide set of that axis in a positional relationship twisted together in space,
A parallel guide that is arranged on the downstream side of the traveling path of the set of guides, twists back the continuous carbon fiber bundles that are twisted, and guides them to the bobbin.
The first guide and the second guide are conical guides;
The parallel guide is a guide partially curved in a concave shape,
The guide device in which a radius of curvature R of the concave curved portion of the parallel guide is 5 mm or more and 15 mm or less. A guide device according to claim 1 and a bobbin.
A winding machine for continuous carbon fiber bundles in which an axis of a parallel guide included in the guide device is parallel to an axis of the bobbin. Using winder according to claim 2, method of producing a carbon fiber bundle winding the carbon fiber bundle to be continuous.

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