Method for manufacturing thread prepreg package and reel for thread prepreg

Abstract

The invention relates to a method for manufacturing a silk thread prepreg package and a reel for silk thread prepreg. A wire prepreg package is formed by winding a wire prepreg (5) around a reel (40). The reel (40) is provided with two guide parts (43, 44) which are arranged at an interval (g1). Each of the guide parts (43, 44) is provided with a first flange (51) and an opaque flange-shaped second flange (52). The second flange (52) is disposed further to the outside in the axial direction than the first flange (51). The thermal conductivity of the second flange (52) is higher than that of the first flange (51). The first flange (51) is exposed to the outside in the axial direction via a through-type surplus confirmation hole (55) formed in the second flange (52). The wire prepreg (5) is guided between the guide parts (43, 44) on both sides and wound in a single-row spiral shape on the reel (40).

Description

Technical Field

[0001] The present invention relates to the formation of a reel for winding a filament prepreg. Background Art

[0002] Prepreg is a material obtained by impregnating fibers made of carbon or the like with liquid resin. Wire prepreg refers to a material in which the fiber base material in the prepreg is in a filamentary form. Wire prepreg using carbon fiber is used as an intermediate material for manufacturing CFRP, for example. CFRP is the abbreviation of Carbon Fiber Rein forced Plastics.

[0003] Patent Document 1 discloses a package of a thermosetting tow prepreg wound on a bobbin. Patent Document 1 proposes a structure in which 1.25 mg / cm 2 The winding angle range of the powder tow prepreg below is 20° or less. Patent Document 1 also describes the case where the tow prepreg is wound on a bobbin with a flange so that the winding angle becomes 0°. The bobbin with a flange is a type of reel.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: Japanese Patent Application Laid-Open No. 9-169861 Summary of the invention

[0007] Problems to be solved by the invention

[0008] Compared with bobbin winding without flanges, reel winding has excellent unwinding properties and can reduce friction and bending during unwinding, thereby suppressing damage to the wire. In addition, compared with package winding, reel winding can shorten the unwinding distance, thereby easily miniaturizing the subsequent process equipment (for example, CFRP manufacturing equipment).

[0009] When the reel is wound, the reel guides the prepreg through the flange to achieve a predetermined winding shape of the prepreg. The flange of the reel has the function of stabilizing the winding shape of the prepreg and protecting the prepreg in the wound state from contact with the outside. In addition, the flange of the reel also has the function of visually confirming the remaining amount of the prepreg from the outside when the prepreg is unwound.

[0010] In the manufacturing process of the prepreg using carbon fiber, the prepreg is heated to a high temperature in order to impart fluidity to the resin. In addition, the prepreg is wound by a winder under appropriate tension to form a reel. Therefore, when the prepreg is wound around a component in the winder, the deformation of the component due to heat and pressure sometimes affects the above functions and becomes a problem.

[0011] The present invention has been made in view of the above circumstances, and an object of the present invention is to stabilize the shape of a package wound with a high-temperature prepreg yarn and to facilitate handling of the package after winding.

[0012] Means used to solve the problem and their effects

[0013] The problems to be solved by the present invention are as described above. Next, means for solving the problems and their effects will be described.

[0014] According to a first aspect of the present invention, the following method for manufacturing a prepreg package is provided. That is, in the manufacturing method, a prepreg is wound around a reel to form a prepreg package. The reel comprises two guide portions which are spaced apart from each other. At least one of the guide portions comprises a first component and an opaque flange-shaped second component. The second component is arranged axially outwardly of the first component. The thermal conductivity of the second component is higher than that of the first component. The prepreg is guided between the two guide portions and wound into a spiral shape in one row on the reel.

[0015] This can effectively suppress the deformation of the guide portion for guiding the prepreg due to heat, and can stably maintain the parallelism of the two guide portions. Therefore, a prepreg package with beautifully wound prepreg can be manufactured, and the prepreg can be unwound from the package well.

[0016] In the above-mentioned method for producing a prepreg package, it is preferable that the first member is transparent or translucent, and the first member is exposed to the outside in the axial direction via a through hole or a cutout formed in the second member.

[0017] Thus, the remaining amount of the thread prepreg can be easily checked through the through hole or the cutout formed in the second member.

[0018] In the above-mentioned method for producing a yarn prepreg package, preferably, the second member has a thermal expansion property lower than a thermal expansion property of the first member.

[0019] This can more effectively suppress deformation of the guide portion due to heat.

[0020] In the above-mentioned method for producing a yarn prepreg package, it is preferable that the second member has a higher rigidity than the first member.

[0021] Thus, the second member can strongly suppress the first member from deforming outward in the axial direction due to heat.

[0022] In the above method for producing a yarn prepreg package, preferably, the first member has a specific gravity smaller than the second member.

[0023] This makes it possible to reduce the weight of the reel and the package while suppressing deformation of the guide portion, thereby facilitating handling such as transportation.

[0024] In the above-mentioned method for producing a yarn prepreg package, the first member and the second member may be bonded to each other via an adhesive layer.

[0025] In this case, the rigidity of the guide portion can be improved satisfactorily.

[0026] In the above-mentioned method for producing a yarn prepreg package, it is possible to configure the first member and the second member so that surfaces thereof are in non-adhesive contact with each other.

[0027] In this case, the deformation of the first member can be released without being transmitted to the second member. In other words, even if the first member is deformed, the second member does not deform accordingly. Therefore, it is advantageous in terms of thermal deformation.

[0028] In the above-mentioned method for producing a yarn prepreg package, an air layer may be formed between the above-mentioned first member and the above-mentioned second member.

[0029] In this case, since heat is less likely to be transferred from the first member to the second member, thermal deformation of the second member can be effectively prevented.

[0030] In the above method for producing a prepreg package, it is preferred that the second member has an outer diameter larger than an outer diameter of the first member.

[0031] Thus, even when the first member is greatly deformed, it is possible to easily prevent the peripheral edge portion of the first member from deforming in an axially outward direction beyond the second member.

[0032] In the above-mentioned method for manufacturing a prepreg package, it is preferable that the winding shaft has a core portion, and the prepreg is wound around the outer periphery of the core portion. At least one of the two guide portions can be removed from the core portion.

[0033] This makes it possible to easily access the wire prepreg wound on the reel. In addition, the reel has good maintainability.

[0034] According to a second aspect of the present invention, a reel for prepreg of a wire having the following structure is provided. That is, the reel is a reel for winding a prepreg of a wire. The reel comprises two guide portions which are arranged at a distance from each other. At least one of the guide portions comprises a transparent or translucent first component and an opaque flange-shaped second component. The second component is arranged at a position axially outward from the first component. The first component is exposed axially outward via a through hole or a cutout formed in the second component. An air layer is formed between the first component and the second component.

[0035] Thus, deformation of the guide portion for guiding the wire prepreg due to heat can be well suppressed, and the parallelism of the two guide portions can be stably maintained. In particular, since heat is difficult to transfer from the first component to the second component, deformation due to heat is difficult to occur in the second component. Therefore, a wire prepreg package in which the wire prepreg is beautifully wound can be manufactured, and the unwinding property of the wire prepreg from the package is also good.

[0036] In the yarn prepreg reel, preferably, the second member has a thermal expansion property lower than a thermal expansion property of the first member.

[0037] This can more effectively suppress deformation of the guide portion due to heat.

[0038] In the yarn prepreg reel, it is preferred that the second member has higher rigidity than the first member.

[0039] Thus, the second member can strongly suppress the first member from deforming outward in the axial direction due to heat.

[0040] In the yarn prepreg reel, it is preferable that the first member has a smaller specific gravity than the second member.

[0041] This makes it possible to reduce the weight of the reel while suppressing deformation of the guide portion, thereby facilitating handling such as transportation.

[0042] The prepreg reel preferably has the following configuration: That is, the prepreg reel includes a core portion around which the prepreg is wound, and at least one of the two guide portions is detachable from the core portion.

[0043] This makes it possible to easily access the wire prepreg wound on the reel. In addition, the reel has good maintainability. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 This is a schematic diagram showing the overall structure of a yarn prepreg manufacturing machine.

[0045] Figure 2This is a partial cross-sectional perspective view showing a state where the filament prepreg is wound around a reel.

[0046] Figure 3 It is a schematic cross-sectional view showing a comparative example.

[0047] Figure 4 This is a schematic cross-sectional view showing a first example of the winding shaft according to the present embodiment.

[0048] Figure 5 It is a schematic cross-sectional view showing a second example of the winding shaft according to the present embodiment.

[0049] Figure 6 It is a schematic cross-sectional view showing a modified example of the second example.

[0050] Figure 7 It is a schematic cross-sectional view showing a third example of the winding shaft according to the present embodiment.

[0051] Figure 8 This is a schematic diagram showing another example of a reel being used in a yarn prepreg manufacturing machine.

[0052] Fig. 9 This is a partial cross-sectional perspective view showing a state where a yarn prepreg is wound around a reel of another example.

[0053] Fig.10 This is a schematic cross-sectional view showing another example of a reel. DETAILED DESCRIPTION

[0054] First, a method for producing a yarn prepreg package will be described.

[0055] exist Figure 1 2 shows a prepreg manufacturing machine 1. The prepreg manufacturing machine 1 can manufacture a prepreg 5 and can manufacture a prepreg package 60 by winding the prepreg 5 around a reel 40.

[0056] The yarn prepreg manufacturing machine 1 includes a carbon fiber supply unit 11 , a resin adhesion device 12 , and a winding device 13 .

[0057] The carbon fiber supplying bobbin 3 can be provided in the carbon fiber supplying section 11. The carbon fiber 4 unwound from the carbon fiber supplying bobbin 3 travels toward the winding device 13 toward the downstream side.

[0058] The resin adhering device 12 includes a roller 31 that can rotate while being immersed in the resin. The resin adhering device 12 includes a heating device (not shown) for heating the resin, thereby making the resin liquid. The roller 31 is in contact with the carbon fiber 4, so that the resin can be attached to the surface of the carbon fiber 4.

[0059] The winding device 13 may be provided with a reel 40 for winding the wire prepreg 5. The winding device 13 may drive the reel 40 to rotate by, for example, an electric motor. Thus, the wire prepreg 5 may be wound around the reel 40.

[0060] like Figure 2 As shown, the reel 40 includes a core portion 41 , a first guide portion 43 , and a second guide portion 44 .

[0061] The core 41 is formed in, for example, a cylindrical shape. The wire prepreg 5 can be wound around the outer peripheral surface of the core 41 .

[0062] The first guide portion 43 is fixed to the end portion on one axial side of the core portion 41. The second guide portion 44 is fixed to the axial end portion of the core portion 41 on the opposite side to the first guide portion 43. Both the first guide portion 43 and the second guide portion 44 are configured in a flange shape. The first guide portion 43 and the second guide portion 44 guide so that the wire prepreg 5 is wound at an appropriate position on the outer peripheral surface of the core portion 41.

[0063] An axial gap is formed between the first guide portion 43 and the second guide portion 44. The gap g1 is a size obtained by adding a small margin to the width of the flat-shaped wire prepreg 5. The size of the gap g1 is less than twice the width of the wire prepreg 5. By guiding the wire prepreg 5 between the first guide portion 43 and the second guide portion 44, the wire prepreg 5 can be neatly wound into a spiral shape with one row centered on the core portion 41.

[0064] The first guide portion 43 and the second guide portion 44 are respectively removable relative to the core portion 41. The structure of removably fixing the first guide portion 43 and the second guide portion 44 relative to the core portion 41 is realized by using, for example, bolts and nuts not shown. Thus, even if the winding of the wire prepreg 5 is disordered, it can be easily arranged by manual operation. In addition, the maintenance of the first guide portion 43 and the second guide portion 44, etc., is improved. It is also possible that only one of the first guide portion 43 and the second guide portion 44 can be removed from the core portion 41.

[0065] The first guide portion 43 and the second guide portion 44 are symmetrically configured and are substantially the same. Therefore, the configuration of the first guide portion 43 will be described below as a representative. In the following description, in the axial direction of the reel 40, the side close to the portion where the wire prepreg 5 is wound around the core portion 41 is sometimes referred to as the axial inner side, and the side away from the side is sometimes referred to as the axial outer side.

[0066] The first guide portion 43 includes a first flange (first member) 51 and a second flange (second member) 52 .

[0067] The first flange 51 is a plate-shaped member formed in a flange shape. The thickness direction of the first flange 51 is parallel to the axial direction of the core 41. The first flange 51 is made of a transparent synthetic resin. The raw material of the first flange 51 is preferably a filler-filled resin. However, the raw material of the first flange 51 can also be, for example, polycarbonate, polytetrafluoroethylene, polyethylene terephthalate, glass, or vinyl chloride.

[0068] The second flange 52 is a plate-shaped member formed in a flange shape. The thickness direction of the second flange 52 is parallel to the axial direction of the core 41. The second flange 52 is arranged at a position axially outward from the first flange 51. The second flange 52 is arranged parallel to the first flange 51. The second flange 52 is opaque. The material of the second flange 52 is preferably metal, such as aluminum. However, the material of the second flange 52 may also be, for example, iron or stainless steel.

[0069] A remaining amount confirmation hole 55 is formed at an appropriate position of the second flange 52 and penetrates the second flange 52 in the thickness direction. The remaining amount confirmation hole 55 can be formed, for example, as a fan-shaped hole centered on the rotation center of the reel 40. The first flange 51 is exposed to the outside through the remaining amount confirmation hole 55. Therefore, the amount of the wire prepreg 5 wound on the reel 40 can be easily confirmed from the side of the reel 40. Instead of the hole, a cutout for confirming the remaining amount can also be formed on the second flange 52. The cutout can be formed, for example, to be elongated in the radial direction in a manner extending from the outer edge of the second flange 52 toward the rotation center.

[0070] like Figure 3 As shown in the comparative example of FIG. 4 , it is assumed that the first guide portion 43 and the second guide portion 44 are both composed of only the transparent first flange 51. The wire prepreg 5 wound around the core 41 is in contact with or close to the first flange 51 under high temperature, so the axial inner surface of the first flange 51 is heated. The thermal conductivity of the first flange 51 is relatively low, so a temperature gradient in the thickness direction is generated inside the material of the first flange 51, which is higher on the axial inner side and lower as it goes to the outer side.

[0071] The axially inner portion of the first flange 51 is at a high temperature, and therefore expands more in the radial direction. The axially outer portion of the first flange 51 is at a low temperature, and therefore expands less in the radial direction. As a result, the first flange 51 is deformed in the axial direction outward as it moves radially outward due to the heat of the wire prepreg 5. When the first flange 51 is deformed in this way, the wire prepreg 5 cannot be properly guided, and therefore, for example, it is wound on the reel 40 in a manner that is separated from the spiral wire prepreg 5 that has been wound into one row. As a result, wear occurs when the wire prepreg 5 is wound or unwound, which may sometimes cause breakage.

[0072] Therefore, in this embodiment, if Figure 4As shown in FIG. 1 , the second flange 52 is provided at an axially outer side than the first flange 51. The thermal expansion of the second flange 52 is lower than that of the first flange 51. In other words, the linear expansion coefficient of the second flange 52 is smaller than that of the first flange 51. In other words, the thermal conductivity of the second flange 52 is higher than that of the first flange 51, so that the temperature gradient described in the first flange 51 is less likely to occur. As a result, the second flange 52 does not deform like the first flange 51.

[0073] The second flange 52 is arranged axially outward from the first flange 51. Therefore, even if the radially outer portion of the first flange 51 is to deform axially outward, the deformation is suppressed by the second flange 52. Therefore, deformation of the entire first guide portion 43 can be reduced.

[0074] exist Figure 4 In the example of FIG. 5 , the first flange 51 and the second flange 52 are bonded to each other by a suitable adhesive. Figure 2 Omitted in, but in Figure 4 2 shows an adhesive layer 53. The first flange 51 and the second flange 52 are mechanically coupled to each other by the adhesive layer 53. Therefore, the second flange 52 can well suppress deformation of the first flange 51.

[0075] However, when the first flange 51 and the second flange 52 having different thermal expansion properties are mechanically joined by the surface, a large force may be applied to the joined portion due to thermal deformation, resulting in damage. In addition, when the first flange 51 is strongly deformed, the second flange 52 may also be deformed together with the first flange 51. In consideration of this, a structure in which the first flange 51 and the second flange 52 are not bonded may be adopted.

[0076] For example, Figure 5 As shown in FIG. 1 , a configuration in which the first flange 51 and the second flange 52 are not bonded but only contact each other in surface. In this configuration, heat from the filament prepreg 5 is applied to the first flange 51. As a result, even if the first flange 51 is deformed in an axial direction outward as it approaches the radially outer side, the deformation is suppressed by the second flange 52 whose deformation due to heat is relatively small. The first flange 51 is not mechanically coupled to the second flange 52, so the surfaces slide against each other, and the deformation of the first flange 51 can be released radially outward.

[0077] exist Figure 5 In the example of , the outer diameters of the first flange 51 and the second flange 52 are substantially equal. Figure 6As shown in the modification example, the outer diameter of the second flange 52 can be changed to be larger than the outer diameter of the first flange 51. The inner first flange 51 is closer to the wire prepreg 5 than the outer second flange 52, and is therefore more susceptible to thermal deformation. Even if the first flange 51 is greatly deformed, if the outer diameter of the second flange 52 is larger than the outer diameter of the first flange 51, it is easy to prevent the peripheral edge of the first flange 51 from deforming in a manner that exceeds the second flange 52. The configuration in which the outer diameter of the second flange 52 is larger than the outer diameter of the first flange 51 can also be similarly applied to the above-mentioned Figure 4 Examples, described later Figure 7 Example.

[0078] like Figure 7 As shown in FIG. 1 , as another example of a structure in which the first flange 51 and the second flange 52 are not bonded, a small gap g2 can be formed between the first flange 51 and the second flange 52. The gap g2 can be realized, for example, by disposing a spacer 54 of appropriate thickness between the first flange 51 and the second flange 52. In this structure, heat from the wire prepreg is applied to the first flange 51, and as a result, the first flange 51 is deformed in a manner that becomes axially outward as it approaches the radially outer side. However, since the first flange 51 and the second flange 52 are opposed to each other with the gap g2 therebetween, even if the first flange 51 is strongly deformed to a certain extent, only the radially outer edge of the first flange 51 is in contact with the second flange 52. Since the contact area is small, it is difficult to conduct heat from the first flange 51 to the second flange 52. Therefore, the deformation of the second flange 52 caused by heat can be significantly suppressed.

[0079] In the present embodiment, the axial length (interval g1) of the core 41 is about 6 mm, and the diameter of the core 41 is about 110 mm. The diameters of the first guide 43 and the second guide 44 (the first flange 51 and the second flange 52) are about 500 mm. The thickness of the first flange 51 is about 2 mm, and the thickness of the second flange 52 is about 3 mm. However, the shape of the reel 40 can be changed in various ways.

[0080] As described above, in the present embodiment, the wire prepreg package 60 is manufactured by the method shown below. The wire prepreg 5 is wound around the reel 40 to form the wire prepreg package 60. The reel 40 includes a first guide portion 43 and a second guide portion 44 arranged at a distance g1. The first guide portion 43 and the second guide portion 44 respectively include a first flange 51 and an opaque second flange 52. The second flange 52 is arranged at a position axially outward of the first flange 51. The thermal conductivity of the second flange 52 is higher than that of the first flange 51. The wire prepreg 5 is guided between the first guide portion 43 and the second guide portion 44 and wound into a spiral shape in one row on the reel 40.

[0081] Thus, the deformation of the first guide portion 43 and the second guide portion 44 that guide the wire prepreg 5 due to heat can be well suppressed, and the parallelism of the first guide portion 43 and the second guide portion 44 can be stably maintained. Therefore, the wire prepreg package 60 in which the wire prepreg 5 is beautifully wound can be manufactured, and the unwinding property of the wire prepreg 5 from the package is also good.

[0082] In the reel 40 of the yarn prepreg package 60 manufactured in the present embodiment, the first flange 51 is transparent or translucent and is exposed to the axially outer side through the through-shaped remaining amount confirmation hole 55 formed in the second flange 52 .

[0083] Thus, the remaining amount of the thread prepreg 5 can be easily confirmed through the remaining amount confirmation hole 55 formed in the second flange 52 .

[0084] In the reel 40 of the yarn prepreg package 60 manufactured in the present embodiment, the thermal expansion property of the second flange 52 is lower than the thermal expansion property of the first flange 51 .

[0085] This can more effectively suppress deformation of the first guide portion 43 and the second guide portion 44 due to heat.

[0086] In the reel 40 of the yarn prepreg package 60 manufactured in the present embodiment, the rigidity of the second flange 52 is higher than the rigidity of the first flange 51 .

[0087] Thus, the second flange 52 can strongly suppress the first flange 51 from deforming axially outward due to heat.

[0088] In the reel 40 of the yarn prepreg package 60 manufactured in the present embodiment, the specific gravity of the first flange 51 is smaller than the specific gravity of the second flange 52 .

[0089] This makes it possible to reduce the weight of the reel 40 and facilitate handling such as transportation.

[0090] exist Figure 4 In the example of , the first flange 51 and the second flange 52 are bonded to each other via an adhesive layer 53 .

[0091] Thereby, the mechanical strength of the first guide portion 43 and the second guide portion 44 can be improved favorably.

[0092] exist Figure 5 In the example, the first flange 51 and the second flange 52 are in non-adhesive contact with each other.

[0093] Thereby, the deformation of the first flange 51 can be released without being transmitted to the second flange 52. Therefore, damage to the first flange 51 and the like can be avoided, and the durability of the spool 40 can be improved well.

[0094] exist Figure 7 In the example of , an air layer is formed between the first flange 51 and the second flange 52 .

[0095] This makes it difficult for heat to be transferred from the first flange 51 to the second flange 52 , and thus it is possible to effectively prevent thermal deformation of the second flange 52 .

[0096] exist Figure 6 In the example, the outer diameter of the second flange 52 is larger than the outer diameter of the first flange 51 .

[0097] Thus, even when the first flange 51 is greatly deformed, it is possible to easily prevent the peripheral edge portion of the first flange 51 from deforming in a manner that exceeds the second flange 52 in the axial direction outward.

[0098] The reel 40 of the prepreg yarn package 60 manufactured in the present embodiment includes a core portion 41. The prepreg yarn 5 is wound around the outer periphery of the core portion 41. The first guide portion 43 and the second guide portion 44 are detachable from the core portion 41.

[0099] This makes it possible to easily access the yarn prepreg 5 wound around the reel 40. Furthermore, the reel 40 has good maintainability.

[0100] Next, another example of the yarn prepreg package will be described.

[0101] like Figure 8 As shown, another example of the wire prepreg package 160 can be Figure 1 The same thread prepreg manufacturing machine 1 manufactures. Figure 8 , components that are the same as or similar to those in the above-described embodiment are sometimes denoted by the same symbols in the drawings and their descriptions are omitted.

[0102] like Fig. 9 As shown in FIG. 1 , the yarn prepreg package 160 includes a reel 140 . The reel 140 includes a core portion 141 , a first guide portion 143 , and a second guide portion 144 .

[0103] The core 141 is formed in, for example, a cylindrical shape. The wire prepreg 5 can be wound around the outer peripheral surface of the core 141 .

[0104] The first guide portion 143 is fixed to the end portion on one axial side of the core portion 141. The second guide portion 144 is fixed to the axial end portion of the core portion 141 on the opposite side to the first guide portion 143. The first guide portion 143 and the second guide portion 144 are both configured in a flange shape. The first guide portion 143 and the second guide portion 144 guide so that the wire prepreg 5 is wound at an appropriate position on the outer peripheral surface of the core portion 141. As with the reel 40 described in the above embodiment, it is preferred that at least one of the first guide portion 143 and the second guide portion 144 can be removed relative to the core portion 141.

[0105] Similar to the spool 40 described in the above embodiment, an axial gap g1 is formed between the first guide portion 143 and the second guide portion 144 .

[0106] The first guide portion 143 and the second guide portion 144 are symmetrically configured and have substantially the same configuration. Therefore, the configuration of the first guide portion 143 will be described below as a representative.

[0107] The first guide portion 143 includes a first flange (first member) 151 and a second flange (second member) 152 .

[0108] The first flange 151 is a plate-like member formed in a flange shape. The thickness direction of the first flange 151 is parallel to the axial direction of the core 141. The first flange 151 is made of a transparent synthetic resin. The raw material of the first flange 151 is preferably a filler-filled resin, polycarbonate, polytetrafluoroethylene or polyethylene terephthalate. However, the raw material of the first flange 151 may also be glass or vinyl chloride.

[0109] The second flange 152 is a plate-shaped member formed in a flange shape. The thickness direction of the second flange 152 is parallel to the axial direction of the core 141. The second flange 152 is arranged at a position closer to the axial outside than the first flange 151. The second flange 152 is arranged parallel to the first flange 151. The second flange 152 is opaque. The material of the second flange 152 is preferably metal, such as aluminum. However, the material of the second flange 152 may also be iron or stainless steel.

[0110] The thermal expansion of the second flange 152 is lower than that of the first flange 151. In other words, the linear expansion coefficient of the second flange 152 is smaller than that of the first flange 151. In other words, the thermal conductivity of the second flange 152 is higher than that of the first flange 151, so that the temperature gradient described in the first flange 151 is less likely to occur. As a result, the second flange 152 does not deform to the same extent as the first flange 151.

[0111] like Fig.10As shown, a small gap g2 is formed between the first flange 151 and the second flange 152. The gap g2 can be realized, for example, by disposing a spacer 154 of appropriate thickness between the first flange 151 and the second flange 152. In this structure, heat from the wire prepreg is applied to the first flange 151, and as a result, the first flange 151 is deformed in a manner that becomes axially outward as it approaches the radially outer side. However, since the first flange 151 and the second flange 152 are opposed to each other with the gap g2 separated therefrom, even if the above-mentioned deformation occurs strongly to a certain extent in the first flange 151, only the radially outer edge portion of the first flange 151 is in contact with the second flange 152. Since the contact area is very small, it is difficult to conduct heat from the first flange 151 to the second flange 152. Therefore, the deformation of the second flange 152 caused by heat can be significantly suppressed.

[0112] As explained above, Figures 8 to 10 The reel 140 of the example shown is a reel for winding the wire prepreg 5. The reel 140 includes a first guide portion 143 and a second guide portion 144 which are arranged at a distance. The first guide portion 143 and the second guide portion 144 include a transparent first flange 151 and an opaque second flange 152, respectively. The second flange 152 is arranged at a position axially outward from the first flange 151. The first flange 151 is exposed to the axially outward through a through-shaped remaining amount confirmation hole 155 formed in the second flange 152. An air layer is formed in the gap g2 between the first flange 151 and the second flange 152.

[0113] Thus, the deformation of the first guide portion 143 and the second guide portion 144 that guide the wire prepreg 5 due to heat can be well suppressed, and the parallelism of the first guide portion 143 and the second guide portion 144 can be stably maintained. In particular, since it is difficult to transfer heat from the first flange 151 to the second flange 152, it is difficult for the second flange 152 to be deformed due to heat. Therefore, a wire prepreg package in which the wire prepreg 5 is beautifully wound can be manufactured, and the unwinding property of the wire prepreg 5 from the package is also good.

[0114] In the reel 140 of the above example, the thermal expansion property of the second flange 152 is lower than the thermal expansion property of the first flange 151 .

[0115] This can more effectively suppress deformation of the first guide portion 143 and the second guide portion 144 due to heat.

[0116] In the spool 140 of the above example, the rigidity of the second flange 152 is higher than the rigidity of the first flange 151 .

[0117] Thus, the second flange 152 can strongly suppress the first flange 151 from deforming axially outward due to heat.

[0118] In the reel 140 of the above example, the specific gravity of the first flange 151 is smaller than the specific gravity of the second flange 152 .

[0119] This makes it possible to reduce the weight of the reel 140 and facilitate handling such as transportation.

[0120] The reel 140 of the above example includes a core portion 141 around which the thread prepreg 5 is wound. The first guide portion 143 and the second guide portion 144 are each detachable from the core portion 141 .

[0121] This makes it possible to easily access the wire prepreg 5 wound around the reel 140. Furthermore, the reel 140 has good maintainability.

[0122] Although the preferred embodiments of the present invention have been described above, the above configurations can be modified, for example, as follows. The modifications can be made individually or in any combination of a plurality of modifications.

[0123] The first flange 51 is not limited to being transparent, and may be, for example, semi-transparent. It is sufficient that the first flange 51 has a degree of transparency that allows the wire prepreg 5 wound around the core 41 to be visually recognized.

[0124] The specific gravity of the first flange 51 is preferably smaller than the specific gravity of the second flange 52 , but may be larger than the specific gravity of the second flange 52 .

[0125] The multiple structure based on the transparent first flange 51 and the opaque second flange 52 may be applied to only one of the first guide portion 43 and the second guide portion 44 .

[0126] When the multiple structure of the transparent first flange 51 and the opaque second flange 52 is applied to both the first guide portion 43 and the second guide portion 44 , a hole or cutout for checking the remaining amount may be formed only in one of the second flanges 52 .

[0127] The first flange 51 may be configured to be opaque.

[0128] Instead of the first flange 51 , a sheet-shaped or film-shaped member may be used.

[0129] The prepreg 5 may be wound while traversing with a small stroke relative to the core 41 of the reel 40 between the first guide 43 and the second guide 44. As long as the traversing width is smaller than the width of the prepreg 5, the prepreg 5 is wound on the reel 40 in a spiral shape in one row.

[0130] For example, by Figure 1The outer circumference of the guide roller 14 that guides the prepreg filament 5 is formed with an annular guide groove immediately upstream of the reel 40 shown, and the guide roller 14 reciprocates in the axial direction with a small stroke as it rotates, thereby enabling traversal. The reel 40 may also be moved in the axial direction with a small stroke instead of the guide roller 14. Traversal can also be achieved by forming the guide groove of the guide roller 14 into a spiral shape.

[0131] The first flange 151 is not limited to being transparent, and may be, for example, semi-transparent. It is sufficient that the first flange 151 has a degree of transparency that allows the wire prepreg 5 wound around the core 141 to be visually recognized.

[0132] The specific gravity of the first flange 151 is preferably smaller than the specific gravity of the second flange 152 , but may be larger than the specific gravity of the second flange 152 .

[0133] The multiple structure based on the transparent first flange 151 and the opaque second flange 152 may be applied to only one of the first guide portion 143 and the second guide portion 144 .

[0134] When the multiple structure of the transparent first flange 151 and the opaque second flange 152 is applied to both the first guide portion 143 and the second guide portion 144 , a hole or cutout for checking the remaining amount may be formed only in one of the second flanges 152 .

[0135] Instead of the first flange 151 , a sheet-shaped or film-shaped member may be used.

[0136] The prepreg 5 may be wound while traversing with a small stroke relative to the core 141 of the reel 140 between the first guide 143 and the second guide 144. As long as the traversing width is smaller than the width of the prepreg 5, the prepreg 5 is wound on the reel 140 in a spiral shape in one row.

[0137] For example, by Figure 8 The outer circumference of the guide roller 14 that guides the prepreg filament 5 is formed with an annular guide groove immediately upstream of the reel 140, and the guide roller 14 reciprocates with a small stroke in the axial direction as it rotates, thereby enabling traversal. The reel 140 may be replaced with a small stroke in the axial direction. Traversal can also be achieved by forming the guide groove of the guide roller 14 into a spiral shape.

[0138] exist Figure 1 as well as Figure 8 In the illustrated configuration, as the carbon fiber pre-wound around the carbon fiber supply bobbin 3, for example, pitch fiber, PAN fiber, etc. can be used. PAN is an abbreviation for polyacrylonitrile.

[0139] exist Figure 1 as well as Figure 8 In the yarn prepreg manufacturing machine 1 shown, carbon fibers are supplied from a prefabricated carbon fiber supply bobbin 3 wound with carbon fibers in the carbon fiber supply unit 11. Instead of this, it is possible to change to a configuration in which carbon fibers are manufactured from raw materials and supplied in the carbon fiber supply unit 11. How to manufacture the carbon fibers is arbitrary, and for example, it is conceivable to fiberize coal tar pitch or fiberize acrylonitrile PAN.

[0140] There are various methods for attaching the resin to the carbon fibers in the resin attaching device 12. For example, a method of impregnating the carbon fibers with the resin by roller transfer, a method of supplying the resin to the carbon fibers by a metering pump, a method of immersing the carbon fibers in a resin storage portion storing liquid resin, and the like can be considered.

[0141] Figure 1 as well as Figure 8 The structure of the yarn prepreg manufacturing machine 1 shown is an example and can be modified as appropriate.

[0142] Explanation of symbols

[0143] 5: filament prepreg; 40: reel; 43: guide; 51: first flange; 52: second flange; 53: adhesive layer; 60: filament prepreg package; 140: reel; 143: guide; 151: first flange; 152: second flange; 160: filament prepreg package; g1: interval; g2: gap.

Claims

1. A method for manufacturing a wire prepreg package, wherein the wire prepreg is wound around a reel to form a wire prepreg package, characterized in that: The reel has two guides spaced apart from each other. At least one of the guide parts has: Part 1; and The opaque flange-shaped second member is arranged axially outwardly of the first member. The thermal conductivity of the second component is higher than that of the first component. The thread prepreg is guided between the two guide portions and wound into a spiral shape in one row on the winding shaft.

2. The method for manufacturing a wire prepreg package according to claim 1, characterized in that: The first component is transparent or translucent, The first member is exposed axially outward via a through hole or a notch formed in the second member.

3. The method for manufacturing a wire prepreg package according to claim 1 or 2, characterized in that: The second member has a lower thermal expansion property than the first member.

4. The method for manufacturing a wire prepreg package according to any one of claims 1 to 3, characterized in that: The second member has a higher rigidity than the first member.

5. The method for manufacturing a wire prepreg package according to any one of claims 1 to 4, characterized in that: The specific gravity of the first member is smaller than the specific gravity of the second member.

6. The method for manufacturing a wire prepreg package according to any one of claims 1 to 5, characterized in that: The first member and the second member are bonded to each other via an adhesive layer.

7. The method for manufacturing a wire prepreg package according to any one of claims 1 to 6, characterized in that: The surfaces of the first member and the second member are in contact with each other without adhesion.

8. The method for manufacturing a wire prepreg package according to any one of claims 1 to 7, characterized in that: An air layer is formed between the first member and the second member.

9. The method for manufacturing a wire prepreg package according to any one of claims 1 to 8, characterized in that: The outer diameter of the second member is larger than the outer diameter of the first member.

10. The method for manufacturing a wire prepreg package according to any one of claims 1 to 9, characterized in that: The reel includes a core portion around which the prepreg is wound. At least one of the two guide portions is detachable from the core portion.

11. A reel for a wire prepreg, used for winding a wire prepreg, characterized in that: The prepreg reel has two guides spaced apart from each other. At least one of the guide parts has: A transparent or translucent first component; The opaque flange-shaped second member is arranged axially outwardly of the first member. The first member is exposed axially outward through a through hole or a notch formed in the second member. An air layer is formed between the first member and the second member.

12. The reel for prepreg of thread according to claim 11, characterized in that: The second member has a lower thermal expansion property than the first member.

13. The reel for prepreg of thread according to claim 11 or 12, characterized in that: The second member has a higher rigidity than the first member.

14. The reel for prepreg of a thread according to any one of claims 11 to 13, characterized in that: The specific gravity of the first member is smaller than the specific gravity of the second member.

15. The spool for prepreg of a thread according to any one of claims 11 to 14, characterized in that: The prepreg reel includes a core portion around which the prepreg is wound. At least one of the two guide portions is detachable from the core portion.

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