JP6280189B1 - Method for manufacturing bow of stranded wire machine - Google Patents

Abstract

A method of manufacturing a bow of a stranded wire machine capable of achieving both weight reduction and improved durability. A method of manufacturing a bow of a stranded wire machine including a molding step of molding a carbon fiber reinforced plastic material 57, 69 to be an FRP portion 35, which is at least a part of a bow, between an upper mold 51 and a lower mold 53. Method. A method of manufacturing a bow of a stranded wire machine in which the first mold 51 and the second mold 53 are respectively curved, or the first mold 51 and the second mold 53 are each linear and divided in the longitudinal direction. The first mold 51 is disposed on the second mold 53, and a part of the cured material 57, 69 is brought into contact with the rest of the uncured material 57, 69. Then, the material 57, 69 is pressed and heated by, for example, an autoclave 65, the base material is cured, and the bow of the stranded wire machine is formed into the shape of the FRP portion 35. [Selection] Figure 5

Description

  The present disclosure relates to a method for manufacturing a bow of a stranded wire machine, a bow of a stranded wire machine, and a stranded wire machine.

  A twisting machine that twists two or more wires is known (for example, Patent Documents 1 to 3). For example, the twisting machine rotates the bow while guiding two or more wires from one end of a bow-shaped member (bow) along the inner surface of the bow, and twists the two or more wires. The bow is produced, for example, by bending a metal plate. Patent Document 1 discloses a bow constituted by a curved metal plate and a hard resin laminated on the surface of the metal plate.

Japanese Patent Application Laid-Open No. 5-247861 JP-A-9-158070 JP 2000-144589 A

  For example, the bow is required to be both lightweight and durable.

  A method of manufacturing a bow of a twister according to one aspect of the present disclosure includes a molding step of molding a carbon fiber reinforced plastic material that is at least a part of a bow of a twister between a first mold and a second mold. Is provided.

  The bow of the twisted wire machine according to one aspect of the present disclosure has an arcuate FRP portion made of carbon fiber reinforced plastic, and an arcuate metal plate overlapping the inner surface of the FRP portion, The inner surface of the FRP portion has a groove that extends along the longitudinal direction of the FRP portion and fits the metal plate, and the outer surface of the FRP portion has a width from the center in the width direction of the outer surface. It has the area | region where the said outer surface swells outside by inclining over the outer edge of a direction both sides.

  The strand wire machine which concerns on 1 aspect of this indication has said bow.

  According to said procedure or structure, it is possible to produce at least one part of a bow with a carbon fiber reinforced plastic, and both weight reduction and durability improvement can be achieved.

The side view which shows typically the principal part structure of an example of a stranding machine. 2A is a plan view showing a part of the bow of the twisted wire machine of FIG. 1, and FIG. 2B is a cross-sectional view taken along the line IIb-IIb of FIG. 2A. Fig.3 (a)-FIG.3 (d) are the schematic diagrams explaining the manufacturing method of a bow. FIG. 4A to FIG. 4C are other schematic diagrams for explaining a method of manufacturing the bow. Fig.5 (a)-FIG.5 (c) are the other schematic diagrams explaining the manufacturing method of a bow. Fig.6 (a)-FIG.6 (f) are the schematic diagrams explaining the lamination | stacking method of a prepreg.

  The bow according to the embodiment will be described below with reference to the drawings. In addition, the dimensional ratio of drawing does not necessarily correspond with an actual thing. Details and the like may be omitted as appropriate, and conversely, characteristic shapes may be exaggerated.

(Stranded wire machine)
FIG. 1 is a side view schematically showing a main configuration of an example of a twisting machine.

  The stranded wire machine 1 shown in this figure is a device that forms a stranded wire 103 by winding a plurality of (three in the illustrated example) wire rods 101 fed from the right side of the paper and winds the stranded wire 103 around the drum 3. The material and diameter of the wire 101 are arbitrary. The dimensions of the entire stranding machine 1 and each part may be set as appropriate according to the material and diameter of the wire 101. As an example, the length of the bow 5 (described later) is 1000 mm to 2000 mm.

  The stranded wire machine 1 includes, for example, a bow 5 that guides a plurality of wires 101, a pair of flyers 7 that hold the bows 5, a pair of main shafts 9 that hold a pair of flyers 7, and the drum 3 described above. And a frame 11 for holding the drum 3.

  The bows 5 are generally bow-shaped members, and one pair is provided. In addition, the arc shape or the arc shape in the present disclosure refers to a relatively thin shape that extends while being curved in a certain direction as a whole. The curvature may not be constant throughout, and the shape of the details is appropriate. In the description of the bow 5 or other bow-shaped member, the concave side of the curve may be expressed as the inner side, and the convex side of the curve may be expressed as the outer side. One of the pair of bows 5 guides the plurality of wires 101. Specifically, the plurality of wires 101 are guided along the inner surface of the bow 5 from one end of the bow 5 to the other end.

  The pair of flyers 7 are arranged opposite to each other and hold both ends of the bow 5. The bow 5 is detachably fixed to the fryer 7 with bolts or the like. The pair of main shafts 9 is fixed to the fryer 7 with the opposing direction of the pair of fryer 7 as the axial direction, and is supported via an appropriate bearing or the like so as to be rotatable about the axis.

  The frame 11 is fixed to the tips of the pair of main shafts 9 in a region surrounded by the pair of bows and the pair of flyers. The drum 3 is supported by the frame 11 so as to be rotatable with the direction orthogonal to the axial direction of the main shaft 9 as the direction of the rotation axis.

  The plurality of wire rods 101 are each routed from a drum (not shown) individually wound to the end on the right side of the bow 5 and from the left end of the bow 5 to the drum 3. The rollers (including capstans) may be provided in an appropriate number and arrangement.

  In the configuration as described above, the bow 5 is rotated by the rotation of the main shaft 9 while feeding the plurality of wire rods 101 from the right end of the bow 5 to the left end of the paper along the bow 5. Thereby, the some wire 101 is twisted together and becomes the twisted wire 103. The number of revolutions of the bow may be set as appropriate, but as an example, it is 2000 to 4000 revolutions per minute.

  The main shaft 9 is driven to rotate by a motor 13 via, for example, a pulley belt mechanism (reference numeral omitted). The drum 3 is rotationally driven by a motor 15 fixed to the frame 11 via, for example, a pulley belt mechanism (reference numeral omitted).

(Bau)
FIG. 2A is a plan view showing a part of the inner surface on one end side of the bow 5. FIG. 2B is a cross-sectional view taken along the line IIb-IIb in FIG. FIG. 2A shows only one end side of the bow 5, but the bow 5 basically has a plane-symmetric configuration with respect to a plane crossing the bow 5 at the center in the longitudinal direction of the bow 5. The other end side of the bow 5 is the same as that shown in FIG. In FIG. 2B, the upper side of the drawing is the outside of the bow 5 (bow-shaped convex side).

  The bow 5 includes a bow-shaped bow main body 31 and a plurality of holders 33 (FIG. 2A) for causing the plurality of wires 101 to follow the inner side surface of the bow main body 31. In FIG. 2A, four attachment positions of the holder 33 are illustrated, and a state in which the two holders 33 are attached to two attachment positions among them is shown.

  Between the bow main body 31 and each holder 33, a gap (not shown) through which the plurality of wires 101 are inserted is formed. The plurality of holders 33 are arranged along the inner surface of the bow main body 31 at an appropriate number and interval. Thereby, the plurality of wires 101 are guided along the inner side surface of the bow body 31 while being separated from the inner side surface of the bow body 31.

  The holder 33 is connected to the bow body 31 by, for example, a nut (not shown) disposed on the inside of the bow 5 screwed onto the bow body 31 and a bolt (not shown) inserted through the holder 33 from the outside of the bow 5. It is fixed. The direction of the bolt and nut may be reversed.

  The bow body 31 includes an arcuate FRP portion 35 made of carbon fiber reinforced plastic (CFRP), and an arcuate metal plate 37 that overlaps the inside of the FRP portion 35. The FRP portion 35 constitutes most of the bow body 31, and the metal plate 37 constitutes a part of the center side of the inner surface of the bow body 31.

  The CFRP that constitutes the FRP portion 35 is so-called dry carbon in which a thermosetting resin is used as a base material (resin) and is pressurized and heated by an autoclave or the like. The thermosetting resin is, for example, an epoxy resin. The composition of the carbon fiber is, for example, a PAN (Polyacrylonitrile) system or a pitch system. Further, as the carbon fiber, a unidirectional (UD) material that is basically aligned in one direction and / or a woven material (also referred to as a fabric material or a cloth material) in which fibers are knitted are appropriately used. The number of layers and the direction of the layers may be set as appropriate.

  The shape of the FRP portion 35 is roughly a curved and elongated plate shape. The planar shape is a shape that gradually decreases toward the center as shown in FIG. The end portion of the FRP portion 35 has, for example, a substantially constant width, and a plurality of holes 39 for attaching the bow 5 to the fryer 7 are formed.

  As shown in FIG. 2B, the inner side surface of the FRP portion 35 extends along the longitudinal direction of the FRP portion 35, and has an overall groove 35g into which the metal plate 37 is fitted. The entire groove 35g is formed by, for example, a flat portion 35ga having a constant depth that is substantially equal to the thickness of the metal plate 37, and an internal groove 35gb that is formed deeper in the center of the flat portion 35ga. The cross-sectional shape of the internal groove 35gb is, for example, an arc shape. The entire groove 35g extends over the entire length of the FRP portion 35, for example, and the cross-sectional shape thereof is constant over the entire length of the FRP portion 35, for example.

  Further, as shown in FIG. 2B, the outer surface of the FRP portion 35 is an area in which the outer surface swells outward by inclining from the center in the width direction of the outer surface to the outer edges on both sides in the width direction. (Convex surface). For example, the convex surface extends over most (for example, 70% or more) including the center side in the longitudinal direction of the FRP portion 35. However, for example, the outer surface may be formed flat at both ends (regions attached to the fryer 7). Specific dimensions and inclination angles in the cross section of the convex surface may be appropriately set according to the position of the FRP portion 35 in the longitudinal direction.

  In addition, since it is “by inclining from the center in the width direction of the outer side surface to the outer edges on both sides in the width direction”, for example, the shape of the convex surface referred to here is shown in FIG. The shape in which the inclined surface is formed only at both ends in the width direction as disclosed in FIG. On the other hand, the shape of the convex surface referred to here is, for example, a shape formed in two planes as shown in the figure, for example, a shape that is an arc shape in a cross section, a curved surface or a plane that has a relatively small ridgeline on the two planes. Shapes are included.

  The material of the metal plate 37 may be an appropriate material such as iron, steel (for example, spring steel), or aluminum. For example, the thickness of the metal plate 37 is constant over the entire metal plate 37. The shape of the metal plate 37 corresponds to the shape of the inner surface of the entire groove 35g of the FRP portion 35, and is not particularly designated, but a convex portion corresponding to the internal groove 35gb in the planar portion corresponding to the flat portion 35ga. It is a shape in which a concave portion is formed from the opposite side. The metal plate 37 is formed by, for example, pressing a sheet metal. For example, the metal plate 37 extends over the entire length of the FRP portion 35.

  The FRP part 35 and the metal plate 37 are fixed by, for example, being fastened together with bolts and nuts (not shown) for fixing the holder 33 to the bow body 31. However, the FRP part 35 and the metal plate 37 may be fixed by an adhesive. In FIG. 2 (a), a hole for inserting a bolt (not shown) is located in the FRP portion 35 and is located as a notch in the edge of the metal plate 37. It may be formed only in the portion 35 or may be formed as a hole in the metal plate 37.

(Bow manufacturing method)
FIG. 3A to FIG. 6F are schematic views illustrating a method for manufacturing the FRP portion 35 of the bow 5. In these drawings, even if the shape and / or characteristics of the material change with the progress of the manufacturing process, the same reference numerals may be used before and after the change.

  As shown in the cross-sectional view of FIG. 5 (b) corresponding to the cross-section of FIG. 2 (b), the FRP portion 35 is a material disposed in the cavity 55 (space) between the upper mold 51 and the lower mold 53. It is formed by molding (CFRP). Here, as shown in the side view of FIG. 5C corresponding to the orientation of FIG. 1, in the present embodiment, the upper mold 51 and the lower mold 53 have an arcuate shape having the same curvature as that of the FRP portion 35. One of the characteristics is that it is formed. Specifically, it is as follows.

  FIG. 3A is a perspective view showing the upper mold 51. FIG. 3B is a cross-sectional view taken along line IIIb-IIIb in FIG.

  As shown in FIG. 3A, the upper mold 51 is configured, for example, by roughly bending a plate-like member extending with a certain width. And the outer side formation groove | channel 51a used as a part of cavity 55 is formed in the inner surface (concave surface) of the plate-shaped member of substantially constant thickness. As illustrated in FIG. 3B, the shape of the outer formation groove 51 a is a shape corresponding to a part of the outer side of the FRP portion 35 (a part of the side surface and the outer surface).

  The upper mold 51 is formed with a hole 51h for bagging (evacuation) at an appropriate position outside the outer formation groove 51a. The hole 51h penetrates the upper mold 51 from the inner surface to the outer surface.

  The upper mold 51 is made of metal, for example. In this case, for example, the upper mold 51 is formed by forming the outer formation groove 51a by cutting a planar sheet metal, and then bending the sheet metal. The metal may be an appropriate material such as aluminum. In addition, the upper mold | type 51 may be comprised with materials other than metals, such as FRP with high heat resistance, or a gypsum.

  3C and 3D are schematic cross-sectional views showing a molding process using only the upper die 51.

  In the present embodiment, before the step of molding the CFRP with the upper mold 51 and the lower mold 53 (FIG. 5B), molding using only the upper mold 51 is performed, and a part of the outside of the FRP portion 35 is formed. (A part of the side surface and the outer surface) are formed first.

  Specifically, as shown in FIG. 3 (c), first, the upper mold 51 is supported by an appropriate tool so that the outer formation groove 51a faces upward, and then, a part of the outside of the FRP portion 35 is The resulting material 57 is placed in the outer forming groove 51a. The material 57 is CFRP, and includes, for example, one or more prepregs.

  In addition, a release film 59 that basically covers the entire material 57, a breather 61 that basically covers the entire material 57 from above the release film 59, and a back film that basically covers the entire breather 61 and the release film 59. 63 are laminated in order.

  The breather 61 is made of a material that allows air to pass through and covers the hole 51h. The back film 63 is made of a material that does not allow air to pass through, and covers the hole 51 h from above the breather 61. Therefore, the pressure of the atmosphere around the upper mold 51 can be applied to the material 57 through the back film 63 by evacuating through the hole 51h. The release film 59 is made of a material that does not transmit the uncured base material of the material 57 and prevents the uncured base material from penetrating into the breather 61.

  After evacuation, as shown in FIG. 3D, the upper mold 51 on which the material 57 and the like are arranged is heated by the autoclave 65 in a pressure atmosphere higher than atmospheric pressure. Thereby, the base material which consists of a thermosetting resin hardens | cures the material 57, and it shape | molds in the shape corresponding to the outer side formation groove | channel 51a. That is, a part of the outside of the FRP portion 35 is formed. Note that the evacuation may be performed during the pressurization and heating.

  FIG. 4A is a perspective view showing the lower mold 53. FIG. 4B is a cross-sectional view taken along line IVb-IVb in FIG.

  As shown in FIG. 4A, the lower mold 53 is configured by, for example, a plate-like member extending approximately with a constant width, similarly to the upper mold 51. An inner forming groove 53a that is a part of the cavity 55 is formed on the outer surface (convex surface) of the plate-like member having a substantially constant thickness. As shown in FIG. 4B, the inner formation groove 53 a has a shape corresponding to a part of the inner side of the FRP portion 35 (a part of the side surface and the inner side surface). The material and forming method of the lower mold 53 are the same as those of the upper mold 51, for example.

  FIG. 4C shows a state in which the remaining material 69 excluding the material 57 (FIG. 3C) among the materials to be the FRP portion 35 is disposed on the lower mold 53.

  Prior to molding by the upper mold 51 and the lower mold 53, the material 69 is thus arranged on the lower mold 53. Specifically, first, the lower mold 53 is supported by an appropriate tool (for example, refer to the stopper 67 in FIG. 5C) so that the inner forming groove 53a faces upward, and then the material 69 is transferred to the outer forming groove 51a. Place in. The material 69 is CFRP like the material 57, and is made of, for example, one or more prepregs.

  Next, as shown in FIGS. 5A and 5B, the upper mold 51 is disposed on the lower mold 53. As a result, the cured material 57 comes into contact with the uncured material 69.

  After the upper mold 51 is arranged on the lower mold 53, the vacuum drawing is performed between the upper mold 51 and the lower mold 53 as shown in FIG. Thereby, the pressure of the atmosphere around these molds can be applied to the material in the cavity 55 through these molds. When evacuating, a sealing material (not shown) is interposed between the upper die 51 and the lower die 53 on the outer periphery of the cavity 55, or the upper die 51 and the lower die 53 are wrapped with a gas-impermeable film. Also good.

  After evacuation, as shown in FIG. 5C, the upper mold 51 and the lower mold 53 are heated by the autoclave 65 in a pressure atmosphere higher than atmospheric pressure. Thereby, as for the material 69, the base material which consists of a thermosetting resin hardens | cures. As a result, the material 69 is molded into a shape corresponding to the inner formation groove 53a, and the material 57 and the material 69 as a whole are molded into the shape of the FRP portion 35, and the material 57 and the material 69 are bonded together. Note that the evacuation may be performed during the pressurization and heating.

  In addition, the autoclave of this process may be combined with the process of FIG.3 (d) so that the code | symbol same as FIG.3 (d) may be attached | subjected to the autoclave in FIG.5 (c). Of course, a separate autoclave may be used.

  FIG. 5C illustrates a pair of L-shaped stoppers 67 in a side view. The pair of stoppers 67 constitute an instrument that supports the lower mold 53 together with a frame (not shown) that fixes them together. The instrument supports both ends of the lower mold 53 by a pair of stoppers 67 and positions in the longitudinal direction (regulates the movement of both ends to the outside), thereby contributing to the conveyance of the upper mold 51 and the lower mold 53 and the like.

(Lamination of prepreg)
FIG. 6A to FIG. 6F are schematic diagrams for explaining an example of the arrangement method of the material 57 in FIG. 3C and the arrangement method of the material 69 in FIG. Specifically, FIG. 6A and FIG. 6D are plan views showing the outer forming groove 51a. FIG. 6B is a sectional view taken along line VIb-VIb in FIG. FIG.6 (e) is sectional drawing in the VIe-VIe line | wire of FIG.6 (d). 6 (b) and 6 (e) show the upper die 51 (material 57), while FIGS. 6 (c) and 6 (f) show the lower die 53 (material 69). It is sectional drawing which shows the cross section similar to 6 (b) and FIG.6 (e). In the following description, regarding the arrangement of the prepreg in the upper mold 51 and the lower mold 53, the reference numerals for the lower mold 53 corresponding to the upper mold 51 are given in parentheses after the reference numerals for the upper mold 51. The description relating to the lower mold 53 is omitted.

  First, a fabric material 71 (prepreg) is overlaid on the inner surface of the outer forming groove 51a (53a). In addition, in Fig.6 (a), it expresses that a prepreg is a textile material by drawing the dotted line in alignment with the direction of a fiber vertically and horizontally. The fabric material 71 is, for example, a plain weave, a twill weave or a satin weave.

  The woven material 71 extends over the entire length and width of the outer forming groove 51a (53a), for example. Then, corresponding to the fact that the outer forming groove 51a (53a) has a shape that becomes narrower toward the center side in the longitudinal direction, the fabric material 71 is cut so that the width becomes narrower toward the center side in the longitudinal direction. For example, only one layer of the woven material 71 is provided in the upper mold 51 (53). However, two or more layers may be provided.

  A UD material 73 (prepreg) is overlaid on the fabric material 71. In FIG. 6B, the dotted line along the fiber direction is drawn in only one direction to express that the prepreg is a UD material. The UD material 73 only needs to function substantially as a UD material, and may include wefts for preventing the fibers from freely separating.

  For example, as shown in FIG. 6 (d), the UD material 73 is arranged so as to form one layer with a plurality of sheets (in FIG. 6 (e) and FIG. 6 (f), for convenience of illustration, 1). The UD material 73 in the layer is not distinguished.) For example, in correspondence with the shape of the outer forming groove 51a (53a) having a narrower width toward the center in the longitudinal direction, two sheets extending with a substantially constant width along the outer edge of the outer forming groove 51a (53a). A UD material 73 and a UD material 73 cut into a substantially triangular shape disposed in a gap between the two UD materials 73 are provided. For example, a plurality of UD materials 73 are stacked in the upper mold 51 (53), although not particularly illustrated.

  As described above, in the method for manufacturing the bow 5 according to the present embodiment, the material (57 and 69) of the carbon fiber reinforced plastic (CFRP) that becomes at least a part of the bow 5 (FRP portion 35) is curved (bowed). A molding step (FIGS. 5B and 5C) for molding between the upper mold 51 and the curved (bow-shaped) lower mold 53 is provided.

  Therefore, for example, various advantageous effects can be obtained as compared with the case of molding by a block type die as in normal CFRP molding.

  For example, since the bow 5 has a long shape, the outer shape of the block mold is very large. As a result, the block mold is expensive and difficult to handle. However, such inconveniences are reduced in the arc-shaped upper mold 51 and lower mold 53. As a result, for example, it becomes practical to form the bow (FRP portion 35) by CFRP, and as a result, the bow 5 made of an appropriate material can be provided.

  In addition, for example, heat is easily transferred to the material of the FRP portion 35 more easily than a block mold. As a result, for example, the quality of the bow 5 can be improved.

  Further, for example, unlike the block mold, it is easy to finely adjust the shape of the FRP portion 35 by adjusting the curvature of the upper mold 51 and the lower mold 53 made of metal. Since the bow 5 is rotated at 2000 to 4000 revolutions per minute, the wind noise increases or decreases due to a subtle difference in shape that cannot be understood by an unfamiliar person at first glance. This reduces the risk of inconveniences such as having to recreate the mold from scratch when the wind noise of the Bau prototype is loud. This effect is particularly effective in CFRP using a thermosetting resin that is difficult to fine-tune after molding as a base material.

  Then, at least a part of the bow 5 is constituted by CFRP, whereby the bow 5 is reduced in weight and durability is improved. As a result, the power consumption for rotating the bow 5 of the stranding machine 1 is reduced, and the running cost is reduced. Further, the management cost is reduced by reducing the number of times of replacement of the bow 5.

  Moreover, in this embodiment, the base material of the material (57 and 69) of the FRP part 35 is a thermosetting resin. The manufacturing method of the bow 5 is such that FRP is formed on the surface (the surface on which the outer forming groove 51a is formed) facing the lower mold 53 of the upper mold 51 before the molding step (FIGS. 5B and 5C). A first placement step (FIG. 3C) for placing a part of the material of the portion 35 (material 57), and a part of the material of the FRP portion 35 (the material 57 after the first placement step and before the molding step). And the material of the FRP portion 35 on the surface (the surface on which the inner forming groove 53a is formed) facing the upper die 51 of the lower die 53 before the molding step. And a second arrangement step (FIG. 4C) for arranging the remainder (material 69). In the molding step (FIGS. 5B and 5C), the upper mold 51 is placed on the lower mold 53, and the cured material 57 is brought into contact with the uncured material 69, so that the upper mold 51 The lower mold 53 heats the material while pressing the material (57 and 69) of the FRP portion 35.

  Therefore, the outer forming groove of the upper mold 51 is compared with an aspect in which all materials are placed on the lower mold 53 in an uncured state and pressed by the upper mold 51 (this aspect is also included in the technology of the present disclosure). The peeling or flow of the uncured material on the surface of 51a is reduced, and the outer surface (the surface formed by the upper mold 51) of the FRP portion 35 is formed with high accuracy. On the other hand, since it is not necessary to bond the portion formed by the upper mold 51 and the portion formed by the lower mold 53 with an adhesive, the manufacturing process is simplified and the accuracy is not lowered due to an adhesion error.

  In the first arrangement step (FIG. 3C), the fabric material 71 (prepreg) is overlaid on the surface facing the lower mold 53 of the upper mold 51 (FIGS. 6A and 6B), A UD material 73 (prepreg) is laminated thereon (FIGS. 6D and 6E). Similarly, in the second arrangement step (FIG. 4C), the fabric material 71 (prepreg) is overlapped on the surface facing the upper mold 51 of the lower mold 53 (FIG. 6C), and the UD material 73 is formed thereon. (Prepreg) is laminated (FIG. 6F).

  Therefore, for example, the outer side surface and the inner side surface of the FRP part 35 are constituted by the woven material 71, and there is a low possibility that the fibers will flutter up. On the other hand, since the inside of the FRP part 35 is configured by the UD material 73, for example, the UD material 73 is bent by bending the UD material 73 along the outer edge whose shape becomes narrower toward the longitudinal center side of the FRP part 35. Can be arranged. As a result, for example, the manufacturing process is facilitated.

  Further, the bow 5 of the present embodiment includes an arcuate FRP portion 35 made of CFRP, and an arcuate metal plate 37 overlapping the inner surface of the FRP portion. The inner side surface of the FRP part 35 has an overall groove 35 g extending along the longitudinal direction of the FRP part 35 and into which the metal plate 37 is fitted. The outer surface of the FRP portion 35 has a region in which the outer surface bulges outward by inclining from the center in the width direction of the outer surface to the outer edges on both sides in the width direction.

  By using the bow-shaped upper mold 51 and lower mold 53, the feasibility of the FRP section 35 made of CFRP is increased, and as a result, the above-described configuration is also possible. Further, for example, since the metal plate 37 is provided, compared to an aspect in which the bow is formed only from CFRP (this aspect is also included in the technology of the present disclosure), the sliding of the wire 101 having high hardness is prevented. Durability is improved. Further, since the outer surface of the bow 5 (FRP portion 35) is formed by molding, it is easy to make it convex or to make the shape and dimensions of the convex surface arbitrary. The convex surface contributes to, for example, reducing the rotational resistance of the bow 5 and / or reducing wind noise.

  In the above embodiment, the upper mold 51 is an example of a first mold, and the lower mold 53 is an example of a second mold.

  The present invention is not limited to the above embodiment, and may be implemented in various aspects.

  The stranded wire machine 1 whose main part is schematically shown in FIG. 1 is merely an example. For example, the twisting machine may rotate a drum that winds a twisted wire with a torque that rotates the main shaft, or the rotating shaft of the drum that winds the twisted wire may be parallel to the main shaft. Good.

  CFRP may be made of a thermoplastic resin as a base material or may be so-called wet carbon. In addition, the CFRP molding is not limited to pressurization of the prepreg, and a resin as a base material may be injected into a mold in which carbon fibers are arranged.

  The first type and the second type are not limited to a curved shape, and may be, for example, a linear shape. And you may produce a bow by giving a bending process with respect to the shape | molded linear member. The linear shape here is typically a rectangular parallelepiped. However, the width or the like may be changed as long as it is a relatively elongated shape extending generally linearly as a whole.

  Each of the linear shape first mold and the second mold may be divided in the longitudinal direction. For example, it may be divided into three in the longitudinal direction. In this case, for example, by changing the central mold to various molds having different lengths, bows of various lengths can be realized while using the molds at both ends as they are. In principle, it is also possible to form a short bow by directly connecting the molds at both ends without using the central mold. In the case of adopting such a configuration divided in the longitudinal direction, for example, various bows having different lengths can be produced in a short period of time.

  The first mold and the second mold may be opened and closed in the horizontal direction. Further, in the case where the mold is opened and closed in the vertical direction, in the embodiment, the mold that forms the outside of the bow is the upper mold, and the mold that forms the inside of the bow is the lower mold.

  In the description of the embodiment, for convenience, one set of the first type and the second type is shown. However, by arranging a plurality of sets of the first type and the second type in the autoclave, a plurality of bows can be heated and heated simultaneously. You may press.

  In the embodiment, one bow is formed by one set of the first mold and the second mold, but grooves (cavities) corresponding to a plurality of bows are formed in parallel in one set of the first mold and the second mold. A plurality of bows may be formed with a pair of the first mold and the second mold. That is, the first type and the second type are not limited to an arcuate shape (elongate curved shape), and may be a wide curved shape.

  The method of laminating the fabric material and the UD material shown in FIG. 6 is merely an example. For example, the FRP portion may be configured with only the woven material or the UD material. The relative relationship between the directions of the fibers of the prepregs stacked on each other may be set as appropriate.

DESCRIPTION OF SYMBOLS 1 ... Strand wire machine, 5 ... Bow, 35 ... FRP part, 51 ... Upper type | mold (1st type | mold), 53 ... Lower type | mold (2nd type | mold).

Claims (3)

Comprising a molding step of molding a material of carbon fiber reinforced plastic that becomes at least a part of a bow of a twisting machine between the first mold and the second mold ;
The said 1st type | mold and the said 2nd type | mold are each a linear shape, The manufacturing method of the bow | bowl of the strand wire machine currently divided | segmented in the longitudinal direction . Comprising a molding step of molding a material of carbon fiber reinforced plastic that becomes at least a part of a bow of a twisting machine between the first mold and the second mold;
The base material of the material is a thermosetting resin,
A first disposing step of disposing a part of the material on a surface of the first mold facing the second mold before the forming step;
A preheating step of heating the part of the material after the first placement step and before the molding step;
A second disposing step of disposing the remainder of the material on a surface of the second die that faces the first die before the forming step;
Further comprising
In the molding step, the first mold is placed on the second mold, the part of the cured material is brought into contact with the remaining uncured material, and the first mold and the mold Heating the material while pressing the material with the second mold
A method for manufacturing a bow of a stranded wire machine. In the first arrangement step, a prepreg of a woven material is stacked on a surface of the first mold facing the second mold, and a unidirectional material prepreg is stacked thereon,
3. The twisted wire machine bow according to claim 2 , wherein in the second arrangement step, a prepreg of a woven material is stacked on a surface of the second mold facing the first mold, and a prepreg of a unidirectional material is stacked thereon. Manufacturing method.

Images