JP2000169042A - Traverse guide for winding fiber bundle, winding device for fiber bundle, and winding method - Google Patents

Abstract

(57) [Problem] To make it possible to form a package by winding a fiber bundle such as glass fiber without causing twist. SOLUTION: A traverse guide 20 used for winding the fiber bundle 14 has a slit 24 through which the fiber bundle 14 passes, and guide surface portions 25 located on both sides of the slit 24.
And a restraining surface portion 26 that restrains the fiber bundle 14 that has passed through the slits 24 located below them. Slit 2
4 has a curved shape, the movement of the fiber bundle 14 at the bottom 24a and the movement of the fiber bundle 14 and the guide surface 25 occur as the traverse guide 20 reciprocates in the axial direction of the package P. The movement of the sliding contact position is extremely smoothly performed. Therefore, the fiber bundle 14 is wound around the package P while maintaining the flat state in which the arrangement of the filaments is not disturbed or twisted, not only during the movement of the traverse guide 20 but also when the movement direction is reversed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a traverse guide for winding a fiber bundle, an apparatus and a method for winding the fiber bundle using the traverse guide.

[0002]

2. Description of the Related Art A non-twisted flat fiber bundle formed by assembling a large number of glass fibers or carbon fibers is, for example, glass fiber reinforced plastic (FRP) or carbon fiber. It is used as a reinforcing fiber material for producing a reinforced polyester resin molded product. Bundles of glass fiber, carbon fiber, etc., for use in such applications are prepared by applying a sizing agent to spun monofilaments, bundling a large number of them, winding them up by a winder, and forming a cylindrical package. After being wound, it is heated and dried and stored, and when used, pulled out of the package and used. When winding as a package, by using a traverse device that reciprocates the fiber bundle in the axial direction of the winder using a means called a traverse guide, the shape of the package is stabilized, and the fiber bundle is removed from the package. In order to make it easier to pull out, a so-called wrapping method is generally adopted.

By the way, since glass fibers and the like are formed by bundling a large number of single fibers (filaments), when they are reciprocated by a traverse device, especially when the direction of movement is reversed at the end of the package. The arrangement of the single fibers constituting the fiber bundle is easily disturbed, and the fiber bundle is liable to be twisted or twisted. Such disorder of the arrangement of the single fibers, twisting and twisting of the fiber bundle, for example, when producing FRP, causes a decrease in the impregnation of the resin into the glass fiber bundle, thereby deteriorating the physical properties and appearance of the FRP product. Easy to cause. That is, during the production of FRP, the glass fiber bundle is opened by various methods so that the resin is easily impregnated,
In other words, it is trying to open the tightened fiber bundle, but the disorder of the arrangement of single fibers as described above, twist of the bundle,
If twisting or the like is present, fiber opening is hindered, and a portion that is not opened in the fiber bundle remains. In this portion, the impregnation property of the resin is reduced.

[0004] In order to solve such a problem, various devices and methods have been proposed. For example, JP
The winding device for direct spinning of glass fiber disclosed in Japanese Patent Application Laid-Open No. 3-61724 discloses a winding package having a good winding shape with a constant winding angle and a good unwinding property without requiring rewinding. To achieve this, the take-up package can be kept at a constant distance from the traverse guide by allowing the take-up shaft to approach and separate from the fixed traverse device. Further, in order to obtain a glass fiber strand having a substantially rectangular cross section and a uniform thickness and width, the method of manufacturing a glass fiber strand disclosed in Japanese Patent Application Laid-Open No. ° tilt,
And it is set parallel to the focusing slit so that the glass fiber strand does not contact the bottom of each slit.
Further, the method for manufacturing a straight-wound roving of glass fibers disclosed in Japanese Patent Application Laid-Open No. S59-111938 discloses a method of manufacturing a large number of glass fibers drawn out from a bushing in order to manufacture a thin roving having a uniform thickness and a wide width. To the filament
After applying a binder with an applicator, the binder is divided and bundled into a pair of strands by a pair of gathering shoes, and then the two strands are combined by a traverse that reciprocates in the axial direction of the winding shaft. Then, it is wound around a shaft to produce a straight roving of glass fiber.

The method and apparatus for assembling filaments disclosed in JP-A-59-138567 is such that the wound cylindrical package has an orderly right-angled edge, and the strands are not aligned at both ends of the package. In order to prevent the strand from being damaged, a traverse guide having a triangular space through which the bundle of filaments passes is provided. In the method of manufacturing a glass fiber roving disclosed in Japanese Patent Application Laid-Open No. 62-226837, the traverse guide reciprocated in the axial direction of the drum of the winding device has a triangular or arcuate space. The filament is guided so that it can be wound on a drum as a flat band with a substantially uniform thickness. JP 63
The method of manufacturing a glass fiber roving disclosed in Japanese Patent No. 25244 discloses a method in which a bundle of filaments drawn out from a bushing is guided to a space of a traverse guide having a substantially isosceles triangular or arc shape, and a split strand in which a group of filaments is bundled is flat. It has a sectional shape. Furthermore, the glass fiber roving winding body disclosed in Japanese Utility Model Application Laid-Open No. 63-19543 has a triangular or arc-shaped space through which a traverse guide reciprocated in the axial direction of the drum passes a bundle of strands. The strand is guided in this space so that it can be wound around the drum to a substantially uniform thickness in a non-twisted state.

A method of manufacturing a glass fiber roving disclosed in Japanese Patent Application Laid-Open No. 63-282057 discloses a method of manufacturing a bundle of filaments drawn out of a bushing by a pair of traverses extending parallel to a direction perpendicular to the axial direction of a winding drum. The guide is guided to the groove of the guide, so that the split strand in which the group of filaments is focused has a flat cross-sectional shape without twisting.

The strand winding device disclosed in Japanese Utility Model Laid-Open Publication No. 57-62759 narrows the opening end of a groove provided in a traverse guide for threading, and when the winding diameter increases, the strand is released from the traverse guide. Departures are reliably prevented so that high quality roving cakes can be produced efficiently.

Further, the apparatus disclosed in Japanese Patent Application Laid-Open No. 02-261776, which winds the aggregated fiber strips in a wide and flat manner, comprises three rolls, upper, middle and lower, below a pair of inter-traverse rolls passing through a traverse member. A set roll is provided above and below, and a convex roll is provided at the bottom and a concave roll is provided at the middle. The aggregate fiber is wide and flat wound around a mandrel pressed against the lower roll. A traverse guide for a fiber yarn winder disclosed in Japanese Patent Application Laid-Open No. H04-317962 has a first guide roller having a right angle with respect to a winding bobbin axis, and a -5 angle.
An intermediate guide roller having an angle difference between adjacent guide rollers of 45 ° or less is arranged between the final guide roller of ± 10 ° and the tape-like fiber bundle is twisted by setting the angle of the final guide roller to minus. The width change of the tape-shaped fiber bundle caused by the traverse of the traverse guide in the left-right direction is reduced, and the tape-shaped fiber bundle is wound flat without bending due to twisting. .

According to the present invention, the arrangement of the single fibers constituting the fiber bundle at the time of forming a package by bundling a large number of single fibers such as glass fibers is improved by an approach different from the above-described conventional technique, It is an object of the present invention to provide a technique for preventing twisting or twisting of a made fiber bundle.

[0010]

In order to achieve the above object, a traverse guide for winding a fiber bundle according to the present invention is a fiber bundle comprising a large number of filaments assembled. Is reciprocated along the axial direction of the rotating take-up winder and wound up, and a traverse guide for winding up the fiber bundle used to form a package comprising the fiber bundle, wherein the passing direction of the fiber bundle is On the upstream side, the longitudinal direction of the slit for passing the fiber bundle is extended in the direction perpendicular to the reciprocating direction,
And the side opposite to the package is provided with an opening, and guide surfaces are provided on both sides of the slit so as to allow the fiber bundle passing through the slit to be twisted along the curved surface shape, and further, the passing direction of the fiber bundle. A restraining surface portion for restraining a fiber bundle that has passed through the slit in cooperation with the slit is provided in the vicinity of a portion located on the downstream side and close to and facing the package being formed, and a bottom portion of the slit is provided in the package. The guide surface portion has a curved surface shape formed by chamfering a portion including both edges of an opening desired on the package side of the slit.

According to a second aspect of the present invention, the guide surface portion has a tapered shape in which the upstream side in the passing direction of the fiber bundle is widened.

According to a third aspect of the present invention, both inner side surfaces of the slit, except for the bottom portion, form substantially parallel surfaces extending in a direction perpendicular to the reciprocating direction.

According to a fourth aspect of the present invention, the distance from the entrance of the slit to the restraining surface is about 5 to 25 times, preferably about 10 to 15 times the diameter of the fiber bundle. I do.

According to a fifth aspect of the present invention, the radius of curvature of the guide surface is larger than the radius of curvature of the bottom of the slit.

According to a sixth aspect of the present invention, the width of the slit is about 2 to 20 times, preferably about 5 to 15 times the thickness of the fiber bundle.

A fiber bundle winding device according to a seventh aspect of the present invention forms a package by winding a fiber bundle composed of a number of filaments assembled using any one of the winding traverse guides described above. A fiber bundle winding device, comprising a guide for guiding the supplied fiber bundle to a slit of the traverse guide on the upstream side in the supply direction of the fiber bundle. In the slit, at least a part of the fiber bundle is arranged so as to be able to be maintained at a position where the fiber bundle is in contact with the curved bottom of the slit, and the restraining surface of the traverse guide is more than the part where the package and the traverse guide are closest. It is characterized by being located on the downstream side in the passing direction of the fiber bundle.

In the method for winding a fiber bundle according to claim 8 of the present invention, a package is formed by winding the fiber bundle composed of a large number of filaments using any one of the winding traverse guides. A method of winding a fiber bundle, wherein the fiber is supplied such that at least a part of the fiber bundle contacts the bottom of the slit in the slit.

[0018]

Embodiments and examples of the present invention will be described below with reference to the drawings. Although only an example relating to the production of glass fiber rovings will be described below, the present invention is not limited to this, and can be applied to winding of various fiber bundles such as carbon fibers.

FIG. 1 is a front view (A) and a side view conceptually showing an apparatus for manufacturing a glass fiber roving which is an embodiment of a fiber bundle winding apparatus using a winding traverse guide according to the present invention. (B). In the present embodiment,
A sizing agent (binder) is attached to a large number (for example, several hundreds to 10,000, generally 400 to 6000) of filaments 11 drawn from the bushing 10 by a binder applicator 12, and the sizing agent is attached to the filament. The group 13 is directly aligned to form a single flat fiber bundle 14, which is wound by a winding device 15 to form a cylindrical package P. In the figure, reference numeral 16 denotes a gathering roll, 17 denotes an adjustment roll, and the gathering roll 16 collects the filaments 11 of the filament group 13 drawn from the chip 10a of the bushing 10 to form a fiber bundle 14.
The adjustment roll 17 adjusts the position of the fiber bundle 14 with respect to the downstream side and guides the fiber bundle 14 to a traverse guide described later. Of course, only one of these rolls may be used, or a plurality of these rolls may be provided.

The winding device 15 includes a winding winder 18 that is driven to rotate by a driving device (not shown), and a traverse guide 20 that reciprocates in the axial direction of the winding winder 18 (the direction of arrow X in FIG. 1A). By passing the fiber bundle 14 through the traverse guide 20, the flat fiber bundle 14 having a substantially uniform thickness is taken up by the winder 18. As shown in FIG. 2, the package P wound by the winding device 15 is obtained by winding the fiber bundle 14 with a so-called twill. In the drawing, reference numeral 21 denotes a holding device for the traverse guide 20. Further, in some of the above-described prior arts, the fiber bundle 14 is pressed against the surface of the package P by a contact roller. However, in this case, the fiber bundle 14 is often physically damaged. This is not adopted in the present embodiment.

The material of the traverse guide 20 needs to be selected from the viewpoint of the sliding property and the abrasion resistance of the fiber bundle 14.
For example, a hard resin such as bakelite can be used. Of course, other materials, for example, metal materials such as brass may be used. As shown in FIGS. 3 and 4, the traverse guide 20 of the illustrated embodiment has a flat upper portion (upstream in the passing direction of the fiber bundle 14: the same applies hereinafter) and a lower portion (downstream in the passing direction of the fiber bundle 14: the same applies hereinafter). ) The guide body 22 has a tapered side and a substantially arcuate fiber bundle guide 23 which is screwed to a flat upper portion of the guide body 22. The guide body 22 includes a slit 24 extending from the top to the center, and a guide surface 25 on both sides of the slit 24.
Are provided below the slit 24 and the guide surface 25. Note that the fiber bundle guide section 23 is
Reference numeral 4 denotes a guide for easily entering the traverse guide 20, and a notch 23 a forming a part of the slit 24 of the guide body 22 is provided. In addition, the traverse guide 20 allows a support shaft (not shown) to pass through a shaft hole 27 provided at a substantially central portion of the guide main body 22 so as to be rotatable around the shaft.
Is held movably also in the radial direction, and it is possible to take a constant state in response to a state where the diameter of the package P increases by winding the fiber bundle 14.

The slit 24 (including the notch 23a of the fiber bundle guide portion 23; the same applies hereinafter) opens toward the package P side, and reciprocates as the traverse guide 20 (indicated by an arrow X in FIG. 1A). It is recessed in a direction perpendicular to the axial direction of the winding winder 18 and the same applies to the following), and both sides forming a wall as a groove are formed substantially parallel, and the depth dimension as the groove passes at the upper part. The width is longer than the width of the fiber bundle 14, and the lower part is formed so as to become shallower as approaching the constraint surface part 26. The width of the opening in the width direction is about 2 to 20 times, preferably about 5 to 15 times the thickness of the fiber bundle 14 passing therethrough. The opening size at the top of the slit 24 may be in a range where there is no problem in introducing the fiber bundle 14, but if it is too large,
In order to reverse the direction of movement of the traverse guide 20 at the axial end of the package P, the fiber bundle 14
Is difficult to follow, and the arrangement of the filaments 11 constituting the fiber bundle 14 is easily disturbed. Conversely, if the opening size is too small, the fiber bundle 14 will not easily enter the slit 24 at the beginning of winding, or the movement of the fiber bundle 14 in the slit 24 will be hindered.

The bottom 24a of the slit 24 is recessed away from the package P and has a substantially semicircular curved surface whose diameter is the distance between both side surfaces of the slit 24.
As described above, the depth of the slit 24 as the groove becomes shallower as it approaches the lower constraining surface portion 26.
Numeral 4 is generally tapered and has a truncated semi-conical groove shape. Further, the entire wall surface of the slit 24 extending from the bottom 24a to the guide surface portion 25 is formed so that the fiber bundle 14 moves while touching the wall surface inside the slit 24, so that there is no extreme inflection portion or corner. . This is because if the wall surface has an extreme inflection or corner, smooth movement of the fiber bundle 14 is hindered, and the arrangement of the filaments in the fiber bundle 14 is disrupted.

The guide surface portion 25 is formed by chamfering both side edges of the slit 24 opening toward the package P so as to have a substantially quadrant cross section. It has a tapered shape with a narrow lower part. The guide surface 25 passes through the slit 24 and
Fiber bundle 1 twisted by 0 degree to reach restraining surface 26
Reference numeral 4 is for permitting the filament to be gradually twisted between the slit 24 and the restraining surface portion 26 along the curved surface shape of the guide surface portion 25 without disturbing the arrangement of the filaments while maintaining the flat state. Of course, the curved surface shape or tapered shape of the guide surface portion 25 is not limited to the illustrated example, and any shape may be used as long as the fiber bundle 14 that has passed through the slit 24 is twisted at a predetermined angle along the curved surface shape.

The restraining surface portion 26 is provided as a smoothed surface below the guide surface portion 25 so as to be close to and opposed to the package P. This restraining surface portion 26 is
4, the fiber bundle 14 is restrained in cooperation with the slit 24 on the downstream side in the passing direction. Specifically, when passing through the slit 24, the fiber bundle 14 in a flat state in which the longitudinal direction is perpendicular to the package P along the direction of the slit 24 extends over the guide surface 25 from within the slit 24. In a state immediately before reaching the restraining surface portion 26 by being twisted 90 degrees along the shape, the state becomes a flat state in which the longitudinal direction is along the axial direction of the package P. It is to be.

For this reason, the traverse guide 20 is not made to be closest to the package P at the position of the restraining surface portion 26, but as shown in FIG. Traverse guide 20 on the line connecting the traverse guide 20
And the package P are closest to each other. The upper edge of the restraining surface 26 is located above the position where the fiber bundle 14 is wound around the package P, in other words, the contact point between the fiber bundle 14 and the package P. Specifically, the position of the upper edge of the constraint surface portion 26 is 1 to 20 m from the closest position between the traverse guide 20 and the package P.
m, preferably 3 to 10 mm below.

Next, the operation of this embodiment will be described with reference to FIGS. A large number of filaments 11 drawn from the bushing 10 form a binder applicator 12.
, The sizing agent is attached to form a filament group 13,
After entering the gathering rolls 16, they are aligned as they are to form one fiber bundle 14. Then, the fiber bundle 14 passes through the adjusting roll 17 and the slit 24 of the traverse guide 20.
to go into. At this time, the slit 2 of the traverse guide 20
4 as well as adjusting the positional relationship between the traverse guide 20 and the gathering rolls 16 and the adjusting rolls 17,
As will be described later, at least a part of the fiber bundle 14 is moved to the bottom 2 of the slit 24 even during the movement of the traverse guide 20.
4a so that the fiber bundle 14 is in contact with the slit 24a.
Then, the fiber bundle 14 is wound around the package P after gradually twisting approximately 90 degrees along the curved surface shape from the inside of the slit 24 to the guide surface portion 25. That is, in the slit 24, the traverse guide 2
From the state of being flat at right angles to the movement direction of 0, the state is changed to a flat state in which the longitudinal direction is along the axial direction of the package P just before reaching the constraint surface portion 26.

Using the traverse guide 20, the fiber bundle 14
Is wound around the package P, the slit 24
It is considered that the fiber bundle 14 moves in the following manner in the guide surface portion 25.

That is, when the traverse guide 20 reciprocates in the axial direction of the package P, the tension is increased or decreased due to a change in the positional relationship between the fixed adjustment roll 17 and the moving traverse guide 20, and the traverse guide 20 is moved. The fiber bundle 14 repeats the movement as shown in FIG. 7 in the slit 24 and in the guide surface portion 25 in a plane with the reversal (turn) of the movement direction. For example, as shown in FIG. 7A, the traverse guide 20 is located at one end (left end in the figure) of one side of the package P.
It is assumed that the winding of the fiber bundle 14 is started.

In the position shown in FIG. 7A, the fiber bundle 14 is in contact with the center of the bottom 24a of the slit 24.
From this state, the traverse guide 20 is moved along the axial direction of the package P as shown in FIG. As the traverse guide 20 moves, the fiber bundle 1
4 slides rearward in the moving direction while sliding on the bottom 24a of the slit 24. As shown in FIG. 7C, the end of the fiber bundle 14 contacts the bottom 24a of the slit 24 at the center of the package P, as shown in FIG. State. At this time, as shown in FIG. 6, the fiber bundle 14 comes in contact from the bottom 24a of the slit 24 to the guide surface 25 while obliquely crossing the guide surface 25, reaches the restraining surface 26, and is wound around the cylindrical package P. go.

As the traverse guide 20 moves, the sliding position between the fiber bundle 14 and the guide surface 25 also moves.
That is, when the traverse guide 20 is at the position shown in FIG. 7A, the fiber bundle 14 slides relatively at the upper portion of the guide surface portion 25, but the sliding position moves downward as the traverse guide 20 moves. 7 (C), the fiber bundle 14 slides relatively below the guide surface 25. Further, the traverse guide 20 has the package P
7D, the fiber bundle 14 starts to move in the reverse direction in the slit 24 to reach the state shown in FIG. 7D, and at the same time, the sliding contact position between the fiber bundle 14 and the guide surface portion 25 moves upward. Moving. Then, at the other end of the package P, the fiber bundle 14 comes into contact with the center of the bottom 24a of the slit 24 again as shown in FIG.
The fiber bundle 14 comes into sliding contact with the guide surface portion 25 relatively above. Immediately thereafter, the moving direction of the traverse guide 20 is reversed (turned), and returns to the state of FIG. 7A at the end on the winding start side of the package P through the operations of FIGS. . The package P winds up while repeating this cycle. Note that the operation after FIG. 7E is the same as FIG. 7F in FIG. 7B, FIG. 7G in FIG.
FIG. 7H shows an operation in which the state of FIG. 7D is inverted.

As described above, the fiber bundle 14 is in a flat state in which the longitudinal direction is orthogonal to the axial direction of the package P at the upper part of the slit 24, but slides from the bottom 24 a of the slit 24 to the guide surface part 25. Meanwhile, it is twisted 90 degrees while keeping the flat state along the curved surface shape, and the longitudinal direction becomes a flat state parallel to the axial direction of the package P just before reaching the restraining surface portion 26. Simultaneously, as the traverse guide 20 reciprocates in the axial direction of the package P, the movement of the fiber bundle 14 at the bottom 24a of the slit 24 and the movement of the sliding contact position between the fiber bundle 14 and the guide surface 25 are periodically changed. Is repeated.

In the traverse guide 20, if there is an extreme inflection or an acute corner at the bottom 24a of the slit 24 or the guide surface 25, the fiber bundle 14
And the movement of the sliding position is hindered by the movement of the traverse guide 20 because the traversing guide 20 is not smoothly moved. ) When the fiber bundle 14
Is likely to be disturbed, or the entire fiber bundle 14 is easily twisted or unnecessarily twisted. However, in the present embodiment, the bottom 24a of the slit 24 has a curved surface shape depressed in a direction away from the package P, and the guide surface 25 chamfers a portion including both edges of the opening facing the package P side of the slit 24. The bottom 24a of the slit 24
The movement of the fiber bundle 14 and the movement of the sliding contact position between the fiber bundle 14 and the guide surface 25 become extremely smooth,
The arrangement of the filaments 11 of the fiber bundle 14 is not disturbed, and the entire fiber bundle 14 is not twisted or unnecessarily twisted.

Also, the guide surface 25
The fiber bundle 14 twisted 90 degrees while keeping the flat state while following the curved surface shape is maintained during the reciprocation of the traverse guide 20 by the cooperation of the slit 24 and the restraining surface portion 25. ing. Therefore, the fiber bundle 14 satisfactorily winds around the cylindrical package P in a flat state without disturbing or twisting the arrangement of the filaments 11.

[0035]

[Experimental Example] Next, an experimental example of the present invention using the apparatus according to the above-described embodiment performed by the present inventors will be described. The experiments performed by the inventors of the present application showed that the diameter of the glass filaments to be bundled was 17 μm, the number was 2,000, the width of the fiber bundle before winding was about 2.0 mm, the thickness was about 0.3 mm, and the wind ratio was 4.3 (the take-up winder rotates 4.3 times by one-way movement of the traverse guide), and the winding speed (linear speed) of the take-up winder is 1000 m.
The traverse guide having the specifications shown in FIG. 8 is prepared and used in the conventional example, the comparative example, and the experimental example of the present invention, and the glass fiber bundle is wound up to form a cylindrical package. It was evaluated by the method of doing.

If the contents of the specifications shown in FIG. 8 are described again, the conventional traverse guide has a slit of the same width (0.8 mm) from the upper end to almost the lower end (groove depth 8 at the upper end).
mm) is provided, and the traverse guide of the comparative example is only provided with slits of the same width having a substantially semicircular (diameter 10 mm) cross-sectional shape from the upper end to almost the lower end. The traverse guide according to the present invention has a groove width of the slit 24 of 3.0 mm, a groove depth of 8 mm at the upper end, a radius of curvature of the bottom of 1.5 mm,
The radius of curvature at the upper end of the guide surface 25 is 4 mm. The traverse guides of the conventional example, the comparative example, and the present invention are all made of the same bakelite material and have a smooth surface on the package side, and have a height of 32 m.
m, the width is 25 mm, and the thickness is 13 mm.

For each of the packages of the conventional example, the experimental example of the present invention, and the comparative example obtained as described above, the shape of the package, the width of the fiber bundle, the number of twists, and the spread width were determined by the following methods. evaluated. The length of the fiber bundle (roving) evaluated for the opening width, the width of the fiber bundle, and the number of twists is determined when the fiber bundle is pulled out from one end of the package and pulled out to the other end. Is the length of

Regarding the shape of the package, when the outer peripheral surface of the cylindrical shape is linear, that is, when there is no bulge, dent, or wavy, ○, bulge, dent,
When there was a ripple, it was evaluated as Δ or × depending on the degree. Regarding the spread width, the fiber bundle 14 (roving) drawn out of the package was converted into three stainless steel bars 28, 29, 30 (diameter 20 mmφ,
(Pitch = 50 mm) and the width after opening is bar 3
The maximum and minimum values were measured using a ruler on 0. Regarding the width of the fiber bundle, the width before opening
8 shows the maximum value and the minimum value measured just before the fiber bundle 14 is applied. Regarding the number of twists, the unspread portion at the time of spreading was counted as a twisted portion, and the average value when evaluated five times with the length of the fiber bundle was shown.

Then, the experimental results shown in FIG. 10 were obtained. Regarding the shape of the package, the conventional example and the present invention have good results, and the comparative example and the present invention have a wide width, that is, a high flatness bundle can be formed with respect to the width of the fiber bundle. The present invention was remarkably excellent with regard to the width of fiber opening, which is also a problem, in other words, the ease of fiber opening.

[0040]

As described above, the traverse guide for winding the fiber bundle according to the present invention is provided between the slit for passing the fiber bundle and the restraining surface for restraining the fiber bundle passing through the slit. A curved surface formed by chamfering a part including both edges of the slit opening, so that the bottom of the slit is depressed in the direction away from the package so as to allow the fiber bundle that has passed through the slit to twist along the curved surface Since the guide surface portion having the shape is provided, it is possible to form a package without causing twist in the fiber bundle, and the fiber to be wound is provided with a binder like glass fiber. Has a high flatness and is easy to open, and therefore has an effect of being excellent in impregnating property of a resin liquid when used for manufacturing FRP or the like.

The fiber bundle winding device according to the present invention uses one of the winding traverse guides according to the present invention to traverse the supplied fiber to the upstream side in the supply direction of the fiber to be bundled into the fiber bundle. Guides leading to the slits, the positional relationship between these guides and the traverse guide is arranged such that at least a part of the fiber bundle contacts the bottom of the slit, and the restraining surface of the traverse guide is formed by the package and the traverse guide. Since the configuration is such that the fiber bundle is located downstream of the nearest part in the passage direction of the fiber bundle, in addition to the above-mentioned common effects, it can be wound without disturbing the arrangement of the filaments constituting the fiber bundle, and the shape of the package can be improved. Is effective.

In the winding method of the fiber bundle according to the present invention, any one of the winding traverse guides according to the present invention is used so that at least a part of the fiber bundle contacts the bottom of the slit of the traverse guide. Is supplied, so that in addition to the above-mentioned common effect, the fiber bundle constituting the fiber bundle can be wound without disturbing the arrangement thereof, and the package shape can be improved.

[Brief description of the drawings]

FIG. 1 is a front view (A) and a side view (B) conceptually showing an apparatus for manufacturing a glass fiber roving, which is an embodiment of a fiber bundle winding apparatus according to the present invention.

FIG. 2 is a side view showing the appearance of a package wound around a twill;

FIG. 3 is an enlarged perspective view of one embodiment of a winding traverse guide according to the present invention.

FIG. 4 is a front view (A), a plan view (B), a side cross-sectional view (C), a side cross-sectional view of a fiber bundle guide section (D), and a plan view of a guide body section (E).

FIG. 5 is a side view showing an embodiment of a winding traverse guide according to the present invention and an arrangement example of a package.

FIG. 6 is a perspective view showing a state in which a bundle of glass fibers is wound using the winding traverse guide according to the present invention.

FIG. 7 is a plan view for explaining movement of a winding traverse guide and movement of a fiber bundle according to the present invention.

FIG. 8 is a diagram showing specifications of a traverse guide of a conventional example, a comparative example, and an experimental example of the present invention used in experiments performed by the present inventors.

FIG. 9 is a side view showing a fiber opening method for comparative evaluation in an experiment performed by the inventors of the present application.

FIG. 10 is a diagram showing the results of an experiment performed by the present inventors.

[Explanation of symbols]

 Reference Signs List 10 bushing 10a bushing tip 11 filament 12 binder applicator 13 filament group 14 fiber bundle 15 winding device 16 gathering roll 17 adjusting roll 18 winding winder 20 traverse guide 21 traverse guide holding device 22 guide body portion 23 fiber bundle guide portion 23a Notch 24 Slit 24a Bottom of Slit 25 Guide Surface 26 Constraining Surface 27 Shaft Hole 28, 29, 30 Opening Bar P Package

Claims (8)

[Claims] 1. A fiber bundle used for forming a package consisting of the above-mentioned fiber bundle by reciprocating and winding a fiber bundle composed of a large number of aggregated filaments along an axial direction of a rotating winding winder. A winding traverse guide, wherein a slit for allowing the fiber bundle to pass therethrough is extended in the upstream direction of the fiber bundle in the longitudinal direction thereof in a direction perpendicular to the reciprocating direction, and faces the package. Aside from the opening, the guide surface portion that allows the fiber bundle passing through the slit to be twisted is provided on both sides of the slit, and further on the package being formed, which is located on the downstream side in the passage direction of the fiber bundle. In the vicinity of the part to be closely opposed, a restraining surface portion that restrains the fiber bundle that has passed through the slit in cooperation with the slit is provided,
The bottom portion of the slit has a curved surface shape depressed in a direction away from the package, and the guide surface portion has a curved shape formed by chamfering a portion including both edges of an opening desired on the package side of the slit. A traverse guide for winding a fiber bundle. 2. The traverse guide for winding a fiber bundle according to claim 1, wherein the guide surface portion has a tapered shape in which the upstream side in the passage direction of the fiber bundle is widened. 3. The traverse for winding a fiber bundle according to claim 1, wherein both inner side surfaces of the slit, except for the bottom portion, form substantially parallel surfaces extending in a direction perpendicular to the reciprocating direction. guide. 4. The method according to claim 1, wherein the distance from the entrance of the slit to the restraining surface is about 5 to 25 times, preferably about 10 to 15 times the diameter of the fiber bundle. Traverse guide for winding any fiber bundle. 5. The traverse guide for winding a fiber bundle according to claim 1, wherein a radius of curvature of said guide surface portion is larger than a radius of curvature of said slit bottom portion. 6. The winding of a fiber bundle according to claim 1, wherein the width of the slit is about 2 to 20 times, preferably about 5 to 15 times the thickness of the fiber bundle. Traverse guide for taking. 7. An apparatus for winding a fiber bundle, wherein the winding traverse guide according to any one of claims 1 to 6 is used to wind a fiber bundle composed of a number of filaments collected to form a package. A guide that guides the supplied fiber bundle to the slit of the traverse guide on the upstream side in the supply direction of the fiber bundle, and determines a positional relationship between the guide and the traverse guide by at least one of the fiber bundles in the slit. Arranged so as to be able to keep the portion in contact with the bottom of the curved surface of the slit, and the restraining surface of the traverse guide on the downstream side in the passage direction of the fiber bundle than the portion where the package and the traverse guide are closest. An apparatus for winding a fiber bundle, which is positioned. 8. A method for winding a fiber bundle, wherein the winding traverse guide according to any one of claims 1 to 6 is used to wind a fiber bundle composed of a number of filaments collected to form a package. And feeding the fibers so that at least a part of the fiber bundle contacts the bottom of the slit in the slit.