JP6439528B2 - Method for producing reinforcing fiber substrate - Google Patents

Description

  The present invention relates to a method for producing a reinforcing fiber substrate.

Productivity excellent fiber reinforced plastic: As molding method (F iber R einforced P lastics FRP ), a base material laminate of reinforcing fiber cloths dry place in a mold, injecting a matrix resin into the mold There is known a so-called RTM molding method in which a reinforcing fiber base laminate is impregnated and a resin is cured, and then a molded product is demolded. And when manufacturing a comparatively large molded product or a thick molded product, as an efficient molding method, a reinforcing fiber base laminate (for example, a plurality of reinforcing fiber bases) is first formed into a predetermined shape. To form a preform of a reinforcing fiber substrate laminate, which is a pre-molding body of FRP, place the preform in a mold, and inject the matrix resin into the mold, A molding method for curing the impregnated resin is employed. As the reinforcing fiber fabric used for such RTM molding, a woven fabric base or an NCF (non-crimp fabric) base is often used. These base materials are produced in a roll form suitable for mass production by a loom or a warp knitting machine. When the preform is produced, a necessary amount of the reinforcing fiber fabric is drawn from the roll to obtain a desired shape. Cutting, laminating, etc.

  However, in the method of drawing a necessary amount of the substrate from the roll and cutting it into a shape corresponding to the product in this way, there are many end materials of the reinforcing fiber fabric remaining after the product shape is cut out, and the waste amount of the reinforcing fibers increases. There was a problem that it contributed to the cost increase.

  In view of this, a fiber placement method has been attracting attention in which the amount of waste is significantly reduced by sequentially arranging reinforcing fiber bundles at necessary locations instead of cutting from a roll.

  For example, Patent Document 1 discloses a method in which a reinforcing fiber bundle whose head attached to a robot hand has tackiness is directly attached to a three-dimensional shape mold. In this method, since a desired amount of reinforcing fiber bundles can be attached to the mold, the amount of reinforcing fibers discarded can be greatly reduced, and since the direct attachment to a three-dimensional mold does not require a preform manufacturing process. There is an advantage of becoming. However, since it sticks along the shape of the mold, the speed becomes slower as the shape becomes more complicated, and it is difficult to use it for the production of automobile members and the like that require high productivity while having a complicated shape.

  Patent Document 2 discloses a so-called TFP (tailored fiber placement) method in which a head arranges a reinforcing fiber bundle on a base fabric and sews at the same time to produce a two-dimensional product shape sheet. . Since this method is generally a method of arranging reinforcing fibers on a plane, it is advantageous in that the arrangement speed is faster than the method of arranging the reinforcing fibers directly in the above-described three-dimensional type. However, in principle, a base fabric is required to sew the reinforcing fiber bundle with the stitch thread, and there is a restriction that the base fabric is mixed until a subsequent process. Moreover, since the arrangement of the reinforcing fiber bundle and the sewing to the base fabric with the stitch yarn are performed at the same time, there is a possibility that the sewing speed becomes rate-limiting.

  Further, Patent Document 3 discloses a method of arranging a reinforcing fiber bundle in a planar shape by a fiber placement head, and then bonding a thermoplastic resin fiber as a binder and integrating the reinforcing fiber bundle to produce a reinforcing fiber fabric. ing. In the above method, the reinforcing fibers are arranged on a flat surface. Therefore, the arrangement speed of the reinforcing fibers is faster than the method of arranging the reinforcing fibers directly on the three-dimensional mold described above, and the base fabric as in the TFP method. There is an advantage not to leave in the product. However, in the above method, since the thermoplastic resin fibers are integrated as a binder, the adjacent reinforcing fiber bundles depend only on the adhesive force of the binder existing across both, so the form of the reinforcing fiber fabric is unstable. Thus, there is a problem that cracks are likely to occur between the reinforcing fiber bundles constituting the reinforcing fiber fabric at the time of shaping, and a portion in which the density of the reinforcing fibers is remarkably reduced occurs, resulting in a decrease in mechanical properties.

Special table 2013-525140 gazette JP 2014-100911 A Special table 2013-532739 gazette

  As described above, since the so-called fiber placement method sequentially arranges the reinforcing fiber bundles at desired locations, it is possible to greatly reduce the discard amount of the reinforcing fibers. In particular, when arranged in a planar shape, the arrangement speed of the reinforcing fibers can be increased, so that the productivity is excellent. However, when the reinforcing fiber bundle is arranged on a flat surface and integrated using a binder, the shape as a base material (particularly the NCF group) is formed at the time of shaping in a post process, such as a textile base material or an NCF base material. In the case of materials, it was difficult to deform along the shape of the mold while maintaining fiber orientation, fiber spacing, and the like.

  Therefore, in view of the current state of the prior art as described above, the object of the present invention is to greatly reduce the discard amount of reinforcing fibers, and to deform along the shape of the mold while maintaining the form as a base material during shaping. An object of the present invention is to provide a method for producing a reinforced fiber base material that is capable of achieving high productivity.

The present invention adopts the following configuration in order to solve such a problem. That is,
(1) A method for producing a reinforcing fiber base having at least one reinforcing fiber bundle layer in which reinforcing fiber bundles are aligned in one direction, wherein the reinforcing fiber bundle is integrated with an auxiliary yarn, comprising: a-1 ) Or a-2) A method for producing a reinforcing fiber substrate having steps b) to e) after passing through any step.
a-1) A surface of a first jig having an opening, at least one reinforcing fiber bundle layer in which reinforcing fiber bundles are arranged at predetermined positions so as to be aligned in one direction and the reinforcing fiber bundles are held. Fiber placement step a-2) to be placed on top Fiber placement for forming at least one reinforcing fiber bundle layer in which reinforcing fiber bundles are arranged so as to be aligned in one direction at a predetermined position of a first jig having an opening. Process,
b) Installation step of installing a second jig having an opening so as to sandwich the reinforcing fiber bundle layer c) Applying sandwiching pressure or tension to the first jig and the second jig A gripping step of gripping the reinforcing fiber bundle layer d) an integration step of integrating the reinforcing fiber bundle layer with the auxiliary thread from the opening of the first jig and / or the second jig e) Removal step of removing the first jig and the second jig (2) The method for producing a reinforcing fiber substrate according to (1), wherein the reinforcing fiber bundle layer is composed of two layers.
(3) The method for producing a reinforcing fiber base according to (1) or (2), wherein in the step a-1), the reinforcing fiber bundle layer is electrostatically adsorbed on a stand that can be electrostatically adsorbed.
(4) In the step a-2), the first jig is placed on a gantry that can be electrostatically attracted, and the reinforcing fiber bundle layer is electrostatically attracted. (1) or (2) A method for producing a reinforcing fiber substrate.
(5) The method for producing a reinforcing fiber base according to any one of (1) to (4), wherein the first jig and / or the second jig have a plurality of openings.
(6) The manufacturing method of the reinforced fiber base material in any one of (1)-(5) whose width | variety of a stitching | suture area is 2.5 mm or more and 300 mm or less among the said opening parts.

  As described above, according to the method for producing a reinforcing fiber base material according to the present invention, the waste amount of the reinforcing fiber can be greatly reduced, and the shape as a base material is deformed while maintaining the form as the base material during shaping. It is possible to manufacture a reinforcing fiber base material that is excellent in productivity and shapeability.

It is one embodiment of the fiber arrangement | positioning process which is one of the manufacturing processes of the reinforced fiber fabric which concerns on this invention. It is another embodiment of the fiber arrangement | positioning process which is one of the manufacturing processes of the reinforced fiber fabric which concerns on this invention. It is one embodiment of the installation process which is one of the manufacturing processes of the reinforced fiber fabric which concerns on this invention. It is one embodiment of the holding | grip process which is one of the manufacturing processes of the reinforced fiber fabric which concerns on this invention. It is one embodiment of the integration process which is one of the manufacturing processes of the reinforced fiber fabric which concerns on this invention. It is one embodiment of the removal process which is one of the manufacturing processes of the reinforced fiber fabric which concerns on this invention. It is explanatory drawing of the 1st jig | tool or 2nd jig | tool which concerns on this invention. It is explanatory drawing of the pitch and space | interval of the auxiliary yarn which concern on this invention.

  The method for producing a reinforcing fiber base according to the present invention includes a fiber arranging step of arranging a reinforcing fiber bundle, an installation step of placing the arranged reinforcing fiber bundle between the first jig and the second jig, A gripping process for fixing the jig 1 and the second jig, an integration process for integrating only the reinforcing fiber bundle with the auxiliary thread, and a removal process for removing the first jig and the second jig. Is done. Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the invention described in the drawings.

<Fiber placement process>
FIG. 1 shows an embodiment of a fiber placement process which is one of the manufacturing processes of a reinforcing fiber base according to the present invention. The reinforcing fiber bundles 114 drawn from the creels 115 are arranged by the fiber placement head 113 so as to be aligned in one direction on the gantry 112, and at least one reinforcing fiber bundle layer 116 is formed. The formed reinforcing fiber bundle layer 116 is placed on the first jig 110 by the transport device 117.

  Here, the type of reinforcing fiber to be used is not limited, but examples thereof include carbon fiber, glass fiber, aramid fiber, metal fiber, and the like, and carbon fiber is particularly preferable because of its high light weight effect. A reinforcing fiber bundle composed of a plurality of types of reinforcing fibers can also be used as the reinforcing fiber bundle.

  The fiber placement head 113 has a mechanism that cuts the reinforcing fiber bundle 114 into a predetermined length and a mechanism that arranges the reinforcing fiber bundle 114 at a predetermined position. You may use the roller which presses a reinforcement fiber bundle, and its pressurization mechanism. Furthermore, when using what the binder etc. have adhered as the reinforcing fiber bundle 114, you may have a heating mechanism which softens and melts this.

  The gantry 112 preferably has a mechanism for holding the reinforcing fiber bundle 114 arranged at a predetermined location. As the holding mechanism, a mechanism that easily activates and releases the holding function at the time of arrangement is preferable. For example, an electrostatic adsorption mechanism that generates an electrostatic force on the surface of the gantry to attract the reinforcing fiber bundle, or a negative pressure on the surface of the gantry. However, the vacuum suction mechanism that adsorbs the reinforced fiber by generating the above is not limited thereto. In particular, an electrostatic adsorption mechanism that can easily generate an adsorption effect uniformly on the entire surface of the gantry is more preferable because even an end fiber can be stably adsorbed.

  The transport device 117 only needs to have a mechanism capable of transporting onto the first jig 110 while maintaining the form of the reinforcing fiber bundle layer 116 arranged so as to be aligned in one direction. A robot hand having a suction mechanism may be mentioned, but this is not restrictive.

  FIG. 2 shows another embodiment of the fiber placement process which is one of the manufacturing processes of the reinforcing fiber fabric according to the present invention. The reinforcing fiber bundle 124 drawn out from the creel 125 is arranged so as to be aligned in one direction on the first jig 120 installed on the gantry 122 by the fiber placement head 123, and the reinforcing fiber bundle layer 126 is formed. At least one layer is formed. On the gantry 122, a mechanism for holding the reinforcing fiber bundle 124 similar to the above-described embodiment may be provided.

<Installation process>
FIG. 3 shows one embodiment of an installation process which is one of the manufacturing processes of the reinforcing fiber fabric according to the present invention. The second jig 138 is installed so as to sandwich the reinforcing fiber bundle layer 136 disposed on the first jig 130.

  Here, each of the first jig 130 and the second jig 138 has a plurality of openings 131, and the openings overlap each other via the reinforcing fiber bundle layer 136. Install to meet.

  The first jig 130 and the second jig 138 are limited to the materials as long as the first jig 130 and the second jig 138 have a rigidity sufficient to sandwich the reinforcing fibers of the reinforcing fiber bundle layer 136 without being disturbed during a subsequent gripping process or transportation. For example, metals such as iron and aluminum, and resins such as acrylic and vinyl chloride are not limited thereto.

  The shape of the opening 131 is not particularly limited. However, in order to efficiently sew the reinforcing fiber bundle layer in the subsequent integration step, it is desirable that the width of the stitching area is constant in the opening. For example, if the width W of the stitching area is constant, the shape of the opening may be rectangular as shown in FIG. 7A, the end may be semicircular, or the shape shown in FIG. It may be curved.

  The width W of the opening 131 is preferably 2.5 mm to 300 mm, and more preferably 5 mm to 100 mm. When the width W of the opening 131 is less than 2.5 mm, the needle of the auxiliary thread stitching head may interfere with the first jig 130 and / or the second jig 138 in the integration process. The reinforcing fiber bundle 136 cannot be sufficiently sewn. In addition, when the width W of the opening 131 is larger than 300 mm, the opening is too large, so that the reinforcing fiber bundle layer cannot be sufficiently gripped in the subsequent gripping process, and the reinforcing fiber is sewn during the integration process. Disturbance tends to occur. On the other hand, in particular, when the thickness is 5 mm or more and 100 mm or less, the above-mentioned reinforcing fiber bundle is sufficiently retained, and further, problems such as needle interference of the auxiliary thread stitching head and insufficient suturing occur during the integration process. I will not let you.

  The distance L between the adjacent openings 131 is preferably 2.5 mm or more and 50 mm or less, and more preferably 2.5 mm or more and 10 mm or less. When the distance L between the adjacent openings 131 is less than 2.5 mm, the suture density of the produced reinforcing fiber fabric is too high, and the suture impedes deformation of the reinforcing fibers during shaping. Sufficient formability cannot be obtained. When the distance L between the adjacent openings 131 is larger than 50 mm, the stitched density of the produced reinforcing fiber cloth becomes too small, and the form retaining property as the reinforcing fiber cloth is inferior. On the other hand, the reinforcing fiber bundle layer can be stitched so that the stitching density is optimal by setting the thickness to 2.5 mm or more and 10 mm or less.

<Gripping process>
FIG. 4 shows an embodiment of a gripping process which is one of the manufacturing processes of the reinforcing fiber fabric according to the present invention. By attaching the gripping mechanism 149 to the first jig 140 and the second jig 148, the gripping mechanism 149 is sandwiched between the first jig 140 and the second jig 148 to apply pressure or tension. Accordingly, the first jig 140, the second jig 148, and the reinforcing fiber bundle layer 146 can be handled and transported together by the gripping mechanism 149.

  The gripping mechanism 149 is held so that the reinforcing fibers of the reinforcing fiber bundle layer 146 sandwiched between the first jig 140 and the second jig 148 are not disturbed, and at least one opening 141 is provided. The gripping mechanism is not limited as long as the overlapping portions do not interfere with each other. For example, the gripping mechanism may be sandwiched by a mechanical mechanism such as a clamp, a vise, or a belt roller, or may be sandwiched by a mechanism using electromagnetic force.

<Integration process>
FIG. 5 shows one embodiment of an integration process which is one of the manufacturing processes of the reinforcing fiber fabric according to the present invention. The reinforcing fiber bundle layer 156 is integrated by stitching the auxiliary thread 157 into the opening 151 of the first jig 150 and the second jig 158 by the auxiliary thread stitching head 152.

  Since the auxiliary thread stitching head 152 sews and integrates the reinforcing fiber bundle layer by penetrating the opening 151, the reinforcing fibers are easily dragged to the suturing needle at the time of penetrating. Then, since the reinforcing fiber bundle layer 156 is sandwiched between the first jig 150 and the second jig 158 and applied with a sandwiching pressure or tension, the reinforcing fiber bundle layer is formed without causing fiber disturbance. Can be stitched and integrated.

  The material of the auxiliary yarn 157 is not particularly limited, and examples thereof include polyethylene, polyamide, polypropylene, polyester, polyphenylene sulfide, polyether sulfone, inorganic fibers (for example, carbon fiber, glass fiber, metal fiber), and blended fibers thereof. This is not the case.

  The sewing pattern of the auxiliary yarn 157 is not particularly limited, and examples thereof include a chain knitting, a 1/1 tricot knitting, or an irregular 1/1 tricot knitting in which a chain knitting and a 1/1 tricot knitting are combined. .

  The pitch p of the auxiliary yarn 157 is preferably 2.5 mm or more and 10 mm or less. When the pitch p is less than 2.5 mm, the stitching density of the produced reinforcing fiber fabric is too high, and the suture thread inhibits deformation of the reinforcing fiber at the time of shaping, so that sufficient shaping property cannot be obtained. . When the pitch p is larger than 10 mm, the stitched density of the produced reinforcing fiber cloth becomes too small, and the form retaining property as the reinforcing fiber cloth is inferior.

  The interval t between the auxiliary yarns 157 is preferably 5 mm or more and 50 mm or less. When the spacing w between the auxiliary yarns 157 is less than 2.5 mm, the stitching density of the produced reinforcing fiber fabric becomes too high, and the suturing yarn hinders deformation of the reinforcing fiber at the time of shaping. Sex cannot be obtained. When the interval w between the auxiliary yarns 157 is larger than 50 mm, the suture density of the produced reinforcing fiber cloth becomes too small, and the form retainability as the reinforcing fiber cloth is inferior.

  An example of the stitching pattern is shown in FIG. 8A shows the pitch p of the auxiliary yarn 187 and the interval t between the auxiliary yarns 187 when the sewing pattern is a chain knitting, and FIG. 8B shows the pitch p of the auxiliary yarn 187 when the sewing pattern is a 1/1 tricot knitting. . By adopting such a stitching pattern, the reinforcing fiber bundles can be made into a reinforcing fiber fabric having sufficient formability without being separated from each other and stitched.

<Removal process>
FIG. 6 shows one embodiment of the removing step which is one of the manufacturing steps of the reinforcing fiber fabric according to the present invention. By removing the first jig 160, the second jig 168, and the gripping mechanism 169, the reinforcing fiber fabric 200 in which the reinforcing fiber bundle layer 166 is integrated with the auxiliary yarn is obtained.

  Examples of the present invention will be described below.

Example 1
<Reinforcing fiber>
As the reinforcing fiber bundle, carbon fiber “Torayca” (registered trademark) T700S manufactured by Toray Industries, Inc. was used. In this example, a reinforcing fiber bundle having a reinforcing fiber bundle width of 10 mm and a reinforcing fiber bundle having 12,000 single yarns was used.

<First jig and second jig>
As the first jig and the second jig, an acrylic plate (size: 500 mm square, thickness: 1 mm) having 20 rectangular openings was used. The openings were 10 mm wide, 400 mm long, and the distance between adjacent openings was 10 mm.

<Fiber placement process>
A gantry having an electrostatic adsorption mechanism was prepared, and the reinforcing fiber bundles were aligned on the gantry without gaps on the gantry using a fiber placement head to produce two 400 mm square reinforcing fiber bundle layers.

  Next, the reinforcing fiber bundle layer is sucked and transported by using a robot hand having an electrostatic adsorption mechanism, and prepared on another stand so that the orientation angle difference of each reinforcing fiber bundle layer becomes 90 °. The first jig was placed and laminated.

<Installation process>
The second jig was placed on the laminated reinforcing fiber bundle layer through the laminated reinforcing fiber bundle layer so that the positions of the openings of the first jig and the second jig coincided with each other. .

<Gripping process>
The opposing outer end portions along the outer circumferences of the first jig and the second jig are sandwiched by a fixing jig (width: 5 mm, length: 400 mm, thickness: 5 mm) having a mechanism for fixing by magnetic force. Thus, the first jig, the second jig, and the reinforcing fiber bundle layer were gripped.

<Integration process>
The reinforcing fiber bundle layer was sutured and integrated into the openings of the first jig and the second jig held in the holding step by using an auxiliary thread sewing head. Polyester fibers (fineness: 30 dtex) were used for the auxiliary yarns, and the stitch pattern was a chain knitting (pitch p: 5 mm, spacing t between auxiliary yarns: 5 mm).

<Removal process>
The fixing jig was removed to obtain a reinforced fiber fabric that was sewn and integrated. As a result of trying to form an aluminum hemispherical mold (diameter: 120 mm, height: 60 mm) using the reinforcing fiber cloth, the reinforcing fiber cloth is good in conformity with the mold shape without causing cracks between the reinforcing fiber bundles. The shaping performance was confirmed.

(Example 2)
<Reinforcing fiber>
As the reinforcing fiber bundle, carbon fiber “Panex 35” manufactured by Zoltek was used. In this example, a reinforcing fiber bundle having a reinforcing fiber bundle width of 25 mm and a reinforcing fiber bundle number of 50,000 was used.

<First jig and second jig>
As the first jig and the second jig, acrylic plates (size: 500 mm square, thickness: 1 mm) having four rectangular openings were used. The opening was 100 mm wide, 450 mm long, and the distance between adjacent openings was 10 mm.

<Fiber placement process>
A gantry having an electrostatic adsorption mechanism was prepared, and the reinforcing fiber bundles were aligned on the gantry without gaps on the gantry using a fiber placement head, and two 450 mm square reinforcing fiber bundle layers were produced.

  Next, each of the reinforcing fiber bundle layers is adsorbed and transported using a robot hand having an electrostatic adsorption mechanism, and placed on another gantry so that the orientation angle difference of each reinforcing fiber bundle layer becomes 120 °. It arrange | positioned and laminated | stacked on the prepared 1st jig | tool.

<Installation process>
The second jig was placed on the laminated reinforcing fiber bundle layer through the laminated reinforcing fiber bundle layer so that the positions of the openings of the first jig and the second jig coincided with each other. .

<Gripping process>
The opposing outer end portions along the outer circumferences of the first jig and the second jig are sandwiched by a fixing jig (width: 5 mm, length: 450 mm, thickness: 5 mm) having a mechanism for fixing by magnetic force. Thus, the first jig, the second jig, and the reinforcing fiber bundle layer were gripped.

<Integration process>
The reinforcing fiber bundle layer was sutured and integrated into the openings of the first jig and the second jig held in the holding step by using an auxiliary thread sewing head. Polyester fibers (fineness: 30 dtex) were used for the auxiliary yarns, and the stitch pattern was a 1/1 tricot knitting (pitch p: 5 mm, spacing t between auxiliary yarns: 10 mm).

<Removal process>
The fixing jig was removed to obtain a reinforced fiber fabric that was sewn and integrated. As a result of trying to form an aluminum hemispherical mold (diameter: 120 mm, height: 60 mm) using the reinforcing fiber cloth, the reinforcing fiber cloth is good in conformity with the mold shape without causing cracks between the reinforcing fiber bundles. The shaping performance was confirmed.

Example 3
In this example, the same reinforcing fiber bundle, first jig, and second jig as in Example 1 were used.

<Fiber placement process>
A base having an electrostatic adsorption mechanism and a first jig are prepared on the base, and the fiber bundle head is used to align the reinforcing fiber bundle on the first jig without any gaps. One reinforcing fiber bundle layer was produced.

<Installation process>
As in Example 1, the second jig is placed on the reinforcing fiber bundle layer so that the positions of the openings of the first jig and the second jig coincide with each other through the reinforcing fiber bundle layer. Installed.

<Gripping process>
The opposing outer end portions along the outer circumferences of the first jig and the second jig are sandwiched by a fixing jig (width: 5 mm, length: 400 mm, thickness: 5 mm) having a mechanism for fixing by magnetic force. Thus, the first jig, the second jig, and the reinforcing fiber bundle layer were gripped.

<Integration process>
In the same manner as in Example 1, the reinforcing fiber bundle layer was sutured and integrated into the openings of the first jig and the second jig held in the holding process by using an auxiliary thread sewing head. Polyester fibers (fineness: 30 dtex) were used for the auxiliary yarns, and the stitch pattern was chain knitting (pitch p: 5 mm, spacing t between auxiliary yarns: 5 mm).

<Removal process>
In the same manner as in Example 1, the first jig, the second jig, and the fixing jig holding the reinforcing fiber bundle layer were removed to obtain a reinforced fiber fabric that was sewn and integrated. As a result of trying to form an aluminum hemispherical mold (diameter: 120 mm, height: 60 mm) using the reinforcing fiber cloth, the reinforcing fiber cloth is good in conformity with the mold shape without causing cracks between the reinforcing fiber bundles. The shaping performance was confirmed.

(Comparative Example 1)
In this comparative example, the fiber placement process was performed in the same manner as in Example 1 except that the first jig and the second jig were not used.

<Integration process>
Although an attempt was made to sew the reinforcing fiber bundle layer using the auxiliary thread stitching head to the reinforcing fiber bundle layer laminated in the fiber placement step, when the suture needle was passed through the reinforcing fiber bundle layer, a part of the reinforcing fiber bundle was The reinforcing fiber bundle layer could not be sutured and integrated by being dragged and disturbed by the suture needle.

(Comparative Example 2)
In this comparative example, the fiber placement process was performed in the same manner as in Example 3 except that the first jig and the second jig were not used. In the integration step, a method of spraying and integrating a resin binder (made of epoxy resin) on the reinforcing fiber bundle layer was used instead of a method of stitching and integrating the reinforcing fiber bundle layer with an auxiliary thread.

<Integration process>
After the epoxy resin used as a resin binder is heated to 200 ° C in a resin tank, it is sprayed with a weight of 6 g / m ^{2 on} one side of the reinforcing fiber bundle layer using a resin spraying device, and pressurized and impregnated with a 100 ° C iron plate Then, the reinforcing fiber bundle layer was integrated to obtain a reinforcing fiber fabric. As a result of attempting to form a hemispherical shape using the reinforcing fiber fabric, the reinforcing fiber fabric was cracked between the reinforcing fiber bundles, and the reinforcing fiber fabric could not retain its form, and good shapeability could not be obtained.

110, 120, 130, 140, 150, 160 First jig 111, 121, 131, 141, 151, 161, 171 Opening 112, 122 Base 113, 123 Fiber placement head 114, 124, 184 Reinforced fiber bundle 115, 125 Creel 116, 126, 136, 146, 156 Reinforced fiber bundle layer 117 Conveying device 118 X-axis linear guide 119 Y-axis linear guide 138, 148, 158, 168 Second jig 149, 159, 169 Holding mechanism 152 Auxiliary thread stitching heads 157, 167, 187 Auxiliary thread 170 First jig or second jig 200 Reinforcing fiber fabric

Claims (6)

A method for producing a reinforced fiber base material comprising at least one reinforced fiber bundle layer in which reinforced fiber bundles are aligned in one direction, wherein the reinforced fiber bundle is integrated with an auxiliary yarn, comprising: a-1) or a -2) The manufacturing method of the reinforced fiber base material which has the process of b) -e) after passing through any process.
a-1) A surface of a first jig having an opening, at least one reinforcing fiber bundle layer in which reinforcing fiber bundles are arranged at predetermined positions so as to be aligned in one direction and the reinforcing fiber bundles are held. Fiber placement step a-2) to be placed on top Fiber placement for forming at least one reinforcing fiber bundle layer in which reinforcing fiber bundles are arranged so as to be aligned in one direction at a predetermined position of a first jig having an opening. Step b) Installation step of installing a second jig having an opening so as to sandwich the reinforcing fiber bundle layer c) A sandwiching pressure or tension is applied to the first jig and the second jig. Gripping step of gripping the reinforcing fiber bundle layer d) Integration step of integrating the reinforcing fiber bundle layer with the auxiliary thread from the opening of the first jig and / or the second jig e) Removal step of removing the first jig and the second jig The manufacturing method of the reinforced fiber base material of Claim 1 with which the said reinforced fiber bundle layer consists of two layers. The method for producing a reinforcing fiber base according to claim 1 or 2, wherein in the step a-1), the reinforcing fiber bundle layer is electrostatically adsorbed on a stand that can be electrostatically adsorbed. The reinforcing fiber base material according to claim 1 or 2, wherein in the step a-2), the first jig is arranged on a stand that can be electrostatically adsorbed, and the reinforcing fiber bundle layer is electrostatically adsorbed. Production method. The said 1st jig | tool and / or the said 2nd jig | tool are a manufacturing method of the reinforced fiber base material in any one of Claims 1-4 which has several opening part. The manufacturing method of the reinforced fiber base material in any one of Claims 1-5 whose width | variety of a stitching | suture area is 2.5 mm or more and 300 mm or less among the said opening parts.