JP5045330B2 - Manufacturing method of fiber reinforced plastic structure - Google Patents

Description

  The present invention relates to a method for manufacturing a fiber-reinforced plastic structure composed of reinforced carbon fibers and a matrix resin, which can be suitably used as a primary structure member such as an aircraft.

  Currently, fiber reinforced plastic composite materials are used in various industrial fields. In particular, in the aerospace field, since structural design requires weight reduction and high strength, structural members used for the ribs of the main wing (or tail wing) of aircraft are manufactured by composite materials made of fiber reinforced plastic. There is a lot to be done.

A technical means for improving the buckling rigidity by combining the plate surface of the structural member and the reinforcing member is known. As a conventional method for attaching a reinforcing member to a structural member,
(1) A method in which the structural member and the reinforcing material are separately molded, and then fixed by riveting in place on the surface of the structural member.
(2) A bracket is disposed at a predetermined position of the lower mold of the upper and lower molds having the mold surface formed in the shape of the molded product, and then the upper and lower molds are clamped and pressed into the molded product shape, and at the same time, A method described in Patent Document 1 for integrating a bracket at a predetermined position,
(3) A reinforcing fiber fabric and a resin diffusion passage forming member are arranged on a mold, the entire molding surface is covered with a bag material, and the injected resin is cured to produce a skin-stringer structural member. 2, the method described in
(4) a step of laminating a thermosetting film and a dry preform on the lower mold jig, and a step of arranging a pre-formed reinforcing member via a thermosetting adhesive on the dry preform; Covering the reinforcing member with a vacuum bag film, sealing the reinforcing member, the thermosetting resin film, and the dry preform, and discharging air from the sealed portion; and sealing with the vacuum bag film Heating the portion from which the air has been discharged, and the method described in Patent Document 3,
(5) A step of arranging a fine member that is one of a two-dimensional fabric and a three-dimensional fabric in the molding jig and another member different from the textile member and sealing the inside, and a resin in the molding jig A method described in Patent Document 1, including a step of injecting a resin into a fabric member and heating the molding jig to cure the resin and integrate the fabric member and the other member, Etc.

  In the method (1), operations such as riveting are generally complicated, and there is a problem that productivity is deteriorated. In order to eliminate the work such as riveting, a large-scale equipment such as automatically riveting the reinforcing member to the structural member is necessary, and such equipment complicates the manufacturing process of the reinforced fiber plastic structure, Increase manufacturing costs.

  In the method (2), it is necessary to provide an upper mold that matches the lower mold, and there are many problems in terms of manufacturing cost and weight when a large structure is manufactured.

In the methods (3) and (4), in the step of sealing the reinforcing member and the plate-shaped body molding material, or the skin and the stringer, care is taken so that the sealing medium does not stretch, and the sealing medium is shaped into the reinforcing member. Or, it is necessary to follow the stringer shape, which generally increases the work time and deteriorates the productivity. In particular, in the step of exhausting air from the sealed portion, there is a problem that the sealing medium is stretched and broken if the sealing medium is not properly aligned with the reinforcing member shape or the stringer shape.
In the method (5), there is a problem that the positions of the members cannot be controlled when the woven member and the other member are arranged side by side in the forming jig. In addition, it is difficult to control the shape of the bag in the process of covering the fabric in a complicated shape with a flexible bag and sealing the inside of the bag so that the bag conforms to the complicated shape. There is a problem of lowering.
JP 56-10413 A JP 2003-53851 A JP 2003-11231 A Japanese Patent No. 3423657

In a conventional method for attaching a reinforcing member to a structural member,
In the method (1), the operation such as riveting is generally complicated and the productivity is deteriorated.
In the method (2), the upper and lower molds are pressed and pressed into a molded product shape, and at the same time, the bracket is integrated at the predetermined position, so the productivity is improved, but it fits the lower mold. It is necessary to provide an upper mold, and when manufacturing a large structure, the manufacturing cost will be increased.
In the methods (3) and (4), since the upper and lower molds are not used, the problems from the manufacturing cost and weight are improved. However, the reinforcing member and the plate-shaped body molding material, or the skin and the stringer are improved. In the process of sealing, it is necessary to make sure that the sealing medium does not stretch, and it is necessary to make the sealing medium conform to the shape of the reinforcing member or the stringer shape, which generally increases the work time and deteriorates the productivity.
In the method (5), there is a problem that the positions of the members cannot be controlled when the woven member and the other member are arranged side by side in the forming jig. In addition, when covering the woven fabric in a complicated shape with a flexible bag, wrinkles occur in the woven fabric, and the strength is significantly reduced.
There was a problem.

  In view of the background of such prior art, the present invention provides a manufacturing method that can be used as a primary structural member for an aircraft and that can manufacture a fiber-reinforced plastic structure excellent in reliability with high productivity and at low cost. .

In order to achieve the above object, the present invention has the following configuration. That is,
In the manufacturing method of the fiber reinforced plastic structure which has a reinforcement member, the manufacturing method of the fiber reinforced plastic structure characterized by including the process of following (A)-(F),
(A) a reinforcing member disposing step of disposing the reinforcing member on a notch portion that is a concave shape located on the upper surface of the convex mold ;
(B) A reinforced fiber fabric laminate in which a laminate made of a reinforced fiber fabric having a thermoplastic resin and / or a thermosetting resin on its surface is disposed on the upper surface of the mold so as to cover at least a part of the reinforcing member. Placement process,
(C) A shaping step of covering the reinforcing fiber fabric laminate with a sealing medium, vacuuming the inside of the sealing medium to reduce the pressure, and applying the atmospheric pressure to the reinforcing fiber fabric laminate,
(D) (C) Reinforcing fiber through the thermoplastic resin and / or thermosetting resin on the surface of the reinforcing fiber cloth by heating the reinforcing fiber cloth laminate in the forming step while applying atmospheric pressure. A hot compaction process for producing a preform by adhering between fabrics;
(E) The preform is covered with a sealing medium, the inside of the sealing medium is vacuumed to reduce the pressure, and in the sealed state, the matrix resin is injected into the inside of the sealing medium using atmospheric pressure, A resin injection impregnation step for impregnating a preform with a matrix resin,
(F) A resin curing step in which the matrix resin impregnated in the preform is heated and cured, and at the same time, the fiber reinforced plastic structure composed of the reinforcing member and the preform is bonded and integrated through the matrix resin.
It is.

  According to the method for manufacturing a fiber-reinforced plastic structure having a reinforcing member according to the present invention, in the step of sealing the reinforcing member and the reinforcing fiber fabric, the reinforcing member is disposed in the notch portion of the mold. Since the sealing medium can be easily arranged without being affected by the shape of the reinforcing member, and the location of the reinforcing member is controlled by the positional accuracy of the notch portion of the mold, the joining position of the reinforcing member Can be manufactured with stable quality.

  In addition, since the reinforcing member and the fiber reinforced fiber fabric can be integrated by a resin curing process after the reinforcing fiber fabric laminate is shaped into the mold shape of the mold surface, the fiber reinforced plastic structure can be manufactured with high productivity and low cost. Can be manufactured.

The manufacturing method of the fiber reinforced plastic structure which concerns on this invention is characterized by including the process of following (A)-(F).
(A) The reinforcing member arrangement | positioning process which arrange | positions a reinforcing member in the notch part which is located in the upper surface of the shaping | molding die which is a convex type, and is a concave type .
(B) A reinforced fiber fabric laminate in which a laminate made of a reinforced fiber fabric having a thermoplastic resin and / or a thermosetting resin on its surface is disposed on the upper surface of the mold so as to cover at least a part of the reinforcing member. Placement process.
(C) A shaping step of covering the reinforcing fiber fabric laminate with a sealing medium, vacuuming the inside of the sealing medium to reduce the pressure, and applying the atmospheric pressure to the reinforcing fiber fabric laminate.
(D) (C) Reinforcing fiber through the thermoplastic resin and / or thermosetting resin on the surface of the reinforcing fiber cloth by heating the reinforcing fiber cloth laminate in the forming step while applying atmospheric pressure. A hot compaction process in which a preform is produced by adhering between fabrics.
(E) The preform is covered with a sealing medium, the inside of the sealing medium is vacuumed to reduce the pressure, and in the sealed state, the matrix resin is injected into the inside of the sealing medium using atmospheric pressure, A resin injection impregnation step in which a preform is impregnated with a matrix resin.
(F) A resin curing step in which the matrix resin impregnated in the preform is heated and cured, and at the same time, the fiber reinforced plastic structure composed of the reinforcing member and the preform is bonded and integrated through the matrix resin.

  Reinforcing fibers constituting fiber reinforced plastics include organic fibers such as aramid fibers, polyethylene fibers, polyparaphenylene benzoxador (PBO) fibers, glass fibers, carbon fibers, silicon carbide fibers, alumina fibers, tyrano fibers, basalts ( Basalt), inorganic fibers such as ceramic fibers, metal fibers such as stainless fibers and steel fibers, and other reinforcing fibers using boron fibers, natural fibers, modified natural fibers and the like as fibers are preferably used. Among them, carbon fiber is lighter among these reinforcing fibers, and has particularly excellent properties in specific strength and specific modulus, and is also excellent in heat resistance and chemical resistance, so it is lightweight. It is suitable for a member such as a structural member of an aircraft that is desired. Furthermore, among carbon fibers, PAN-based carbon fibers from which high-strength carbon fibers can be easily obtained are particularly preferable.

  In addition, the matrix resin constituting the fiber reinforced plastic includes epoxy resin, unsaturated polyester resin, vinyl ester resin, phenol resin, epoxy acrylate resin, urethane acrylate resin, phenoxy resin, alkyd resin, urethane resin, maleimide resin, cyanate resin. A thermosetting resin such as is preferably used. Among these, an epoxy resin, an unsaturated polyester resin, a vinyl ester resin, a phenol resin, an acrylic resin, or a mixed resin thereof is preferable, and an epoxy resin is particularly preferable in view of imparting high toughness.

In the reinforcing member arranging step of the step (A), the reinforcing member constituting the fiber reinforced plastic structure is located on the upper surface of the convex mold, and is arranged in the notched portion that is concave . Here, the fiber reinforced plastic structure is used for an aircraft structural member or the like, and includes a fiber reinforced plastic formed in a predetermined shape and a reinforcing member integrally fixed thereto. Is.

  The reinforcing member is a member having a shape necessary for the strength of the fiber reinforced plastic structure, and examples of the shape include a T shape, an L shape, a trapezoid, a triangle, and a semicircle. Examples of the material of the reinforcing member include metals, plastics, and fiber reinforced plastics. Among these, the same material as other members of the fiber reinforced plastic structure, that is, the fiber reinforced plastic is preferable.

The mold used in the present invention has a shape that matches the desired shape of the fiber-reinforced plastic structure, and the shape is a convex shape, a concave shape, or the like. The surface shape of such a mold is configured to be substantially the same as the surface shape of the fiber-reinforced plastic structure to be molded, and a cutout portion in which the reinforcing member can be disposed is provided. In consideration of the formability of the reinforcing fiber fabric laminate described later, the mold is a convex shape, and the notch portion is a concave shape . Also, considering the ease of the reinforcing member arranging step, the notch is notched. It is important that the portion is provided so as to be located on the upper surface of the mold .

  The cross-sectional shape of the notch portion of the mold is configured to be substantially the same as the shape of the reinforcing member that reinforces the fiber-reinforced plastic structure, and as described above, a T-shape, an L-shape, a trapezoid, Examples include triangles and semicircles. In addition, the number of notch parts of a shaping | molding die and the number of reinforcement members can be suitably determined according to the intensity | strength required for a fiber reinforced plastic structure.

  Examples of the material of the mold include steel, aluminum, invar and other metal materials, wood, and fiber reinforced plastic. Rigidity that does not deform even when atmospheric pressure is applied in the shaping process (step (C)) described later. Although it is necessary to combine heat resistance that can withstand a resin curing step (step (F)), which will be described later, there is no limitation on the structure or material as long as it has such characteristics. The mold may be provided with a demolding mechanism for demolding the fiber reinforced plastic structure after molding.

  In the arranging step of the reinforcing fiber fabric laminate in the step (B), the laminate made of the reinforcing fiber fabric is arranged on the upper surface of the mold so as to cover at least a part of the reinforcing member. Here, the reinforcing fiber fabric means a woven fabric woven with reinforcing fibers, and as the reinforcing fibers used, the reinforcing fibers listed in the reinforcing fibers constituting the above-mentioned fiber-reinforced plastic are preferably used. In addition, as described above, carbon fiber is light among these reinforcing fibers, and has particularly excellent properties in specific strength and specific modulus, and also has excellent heat resistance and chemical resistance. It is suitable for a member such as a structural member of an aircraft for which weight reduction is desired. Furthermore, among carbon fibers, PAN-based carbon fibers from which high-strength carbon fibers can be easily obtained are particularly preferable.

  The laminate made of reinforcing fiber fabric means a product obtained by laminating a plurality of the reinforcing fiber fabrics based on a predetermined lamination configuration. Unlike the preform having the shape of the final molded product, It is a material used for manufacturing. In addition, the surface of each reinforcement fiber fabric which forms a laminated body contains a thermoplastic resin and / or a thermosetting resin. As such a thermosetting resin, an epoxy resin, an unsaturated polyester resin, a vinyl ester resin, a phenol resin, or the like can be used. The thermoplastic resins include polyvinyl acetate, polycarbonate, polyacetal, polyphenylene oxide, polyphenylene sulfide, polyarylate, polyester, polyamide, polyamideimide, polyimide, polyetherimide, polysulfone, polyethersulfone, polyetheretherketone, polyaramid. Polybenzimidazole, polyethylene, polypropylene, cellulose acetate and the like can be used. Among these, in consideration of adhering between the reinforcing fiber fabrics by heating and pressing after shaping the reinforcing fiber fabric laminate, and adhering to the matrix resin after curing, the thermoplastic resin alone having good adhesion to the matrix resin Alternatively, it is preferable to use a blend of a thermoplastic resin and a thermosetting resin.

  The adhesion form of the thermoplastic resin and / or the thermosetting resin to the reinforcing fiber fabric may be any of dotted, linear or discontinuous linear. In order to make it adhere in a dot shape, it is preferable that a particulate or powdery thermoplastic resin and / or a thermosetting resin is sprayed on the surface of the reinforcing fiber fabric and thermally fused. Moreover, in order to make it adhere in linear or discontinuous linear form, it is good to heat-bond, after bonding the fabric which consists of continuous fibers, such as a nonwoven fabric and a textile fabric, on the surface of a reinforced fiber fabric. Such thermoplastic resin and / or thermosetting resin may be provided on one side or both sides of the reinforcing fiber fabric.

  The laminated body thus obtained is arranged on the upper surface of the mold so as to cover at least a part of the reinforcing member. At this time, it is preferable to arrange an adhesive between the reinforcing member and the reinforcing fiber fabric. The adhesive used can efficiently attach between the reinforcing fiber fabrics in the hot compaction step (step (D)) described later, and is effectively cured in the resin curing step (step (F)) described later. It is preferable that the adhesive is made of a thermosetting resin such as an epoxy resin or a phenol resin that can be used and can have high strength. The adhesive may be in the form of a film, liquid, powder, etc., but it is preferable that the adhesive is easy to handle and has a stable quality.

  In the shaping step of step (C), the reinforcing fiber fabric laminate is covered with a sealed medium, the inside of the sealed medium is vacuumed to reduce the pressure, and the reinforcing fiber fabric laminate is shaped by applying atmospheric pressure. Here, the sealed medium needs to have durability capable of keeping the inside of the sealed medium sealed in a heated state in a hot compaction process (step (D)) to be described later. Examples thereof include polymer materials such as nylon, fluorine, silicon, aramid, polyimide, and polyethylene. However, the structure and material are not limited as long as the material has such characteristics. In addition, it is preferable to use a rubber sheet for the sealing medium used in the shaping step in consideration of following the shaping shape of the reinforcing fiber fabric laminate.

  In the hot compaction step of step (D), the reinforcing fiber fabric laminate is heated in a state where atmospheric pressure is applied to the reinforcing fiber fabric laminate in the shaping step (step (C)). A preform is manufactured by adhering between reinforcing fiber fabrics via a thermosetting resin. Here, examples of the heating method include hot air heating, heating medium heating, and the like, but the heating method is not limited as long as the temperature can be controlled. The heating temperature of the reinforcing fiber fabric laminate is preferably not less than the glass transition temperature of the thermoplastic resin and / or thermosetting resin on the surface of the reinforcing fiber fabric and not more than 200 ° C.

  The preform obtained in this way is preferable because the thermoplastic fiber and / or thermosetting resin on the surface of the reinforcing fiber cloth can be adhered between the reinforcing fiber cloths and the preform shape retention is improved. Moreover, it is preferable to adhere | attach this preform and the said reinforcement member through the thermoplastic resin or / and thermosetting resin of the surface of a reinforced fiber fabric, or the adhesive agent arrange | positioned at the said process (B).

  In the resin injection impregnation step of the step (E), the preform is covered with a sealing medium, the inside of the sealing medium is vacuumed and depressurized, and in the sealed state, the atmospheric pressure is used to bring the inside into the sealing medium. The matrix resin is injected, and the preform is impregnated with the matrix resin. It is preferable that a secondary material for securing a flow path of the matrix resin is disposed in the sealing medium. At this time, it is preferable that the space between the reinforcing member and the cutout portion is sealed in consideration of the flow region of the resin in the sealed medium, and the reinforcing member is cut in advance in consideration of the sealing property in the sealed medium. It is preferable that a sealing material is disposed between the notch portion and the space between the reinforcing member and the notch portion is sealed when sealed with a sealing medium.

  Here, the sealing medium is a durability capable of keeping the inside of the sealing medium sealed in a heated state in a resin injection impregnation step (step (E)) and a resin curing step (step (F)) described later. It is necessary to provide chemical resistance to the resin to be injected, and examples of the material of the sealing medium include polymer materials such as nylon, fluorine, silicon, aramid, polyimide, and polyethylene. There is no limitation on the structure and materials as long as they have. The sealing medium used in the resin injection impregnation step (step (E)) and the resin curing step (step (F)), which will be described later, is preferably a nylon film in view of excellent durability during heating. .

  In the resin curing step (F), the matrix resin impregnated in the preform is heated and cured, and at the same time, the fiber reinforced plastic structure composed of the reinforcing member and the preform is bonded and integrated through the matrix resin. Turn into. Here, the heating temperature of the matrix resin is preferably raised to the curing temperature of the matrix resin. In view of physical properties (for example, durability) required for the fiber-reinforced plastic structure, it is 120 ° C. or more and 200 ° C. The following is more preferable. The curing temperature of the matrix resin is measured by directly attaching a thermocouple to the fiber reinforced plastic structure via an insulating tape, or by attaching a thermocouple to a jig that can represent the fiber reinforced plastic structure temperature. be able to.

  The fiber-reinforced plastic structure thus obtained has a reinforcing member with stable quality at the joining position, and can be manufactured with high productivity at low cost, and is particularly suitable as a primary structural member for an aircraft or the like. Can be used.

  Hereinafter, embodiments of the present invention will be described in more detail with reference to the drawings. In addition, this invention is not limited to the aspect described in drawing.

Example 1
The mold 1 shown in FIG. 1 includes a hollow convex portion 2 and a flat plate portion 3, and the hollow convex portion 2 and the flat convex portion 2 are arranged so that no air leaks from the installation portion of the hollow convex portion 2 and the flat plate portion 3 in the sealing process. The flat plate part 3 is welded. The material of the mold 1 is made of SUS304, and the thickness of the mold wall is as long as it has both rigidity that does not deform even when atmospheric pressure is applied and heat resistance that can withstand the resin curing process (step (F)) described later. It is designed in the region of 10-40m. The cutout portion 4 of the mold 1 is a concave mold and is located on the upper surface of the mold 1. Moreover, the shape of the notch part 4 is comprised by the T shape substantially the same as the shape of a reinforcement member in the reinforcement member arrangement | positioning process (process (B)) mentioned later.

  Next, as shown in FIG. 8, after the sealing material 13 was arranged between the reinforcing member 5 and the cutout portion 4, the reinforcing member 5 was arranged in the cutout portion 4 as shown in FIG. 2. The material of the reinforcing member 5 is made of FRP, and the FRP is made of carbon fiber as a reinforcing fiber. The shape of the reinforcing member 5 was a T-shape substantially the same as the shape of the cutout portion 4.

Next, as shown in FIG. 7, the reinforcing fiber fabric laminate 7 is covered with the adhesive 6 on the reinforcing member 5 so as to cover the surface of the reinforcing member 5 that appears on the upper surface of the mold 1 as shown in FIG. 3. Placed over. As the adhesive 6, an epoxy resin film adhesive was used. The reinforced fiber fabric laminate 7 was a unidirectional carbon fiber woven fabric having a carbon fiber basis weight of 190 g / cm ² composed of carbon fibers T800S (manufactured by Toray Industries, Inc.) as reinforcing fibers. The reinforcing fiber fabric has toughening particles made of PES and epoxy resin attached to the surfaces of both surfaces thereof. The reinforcing fiber fabric laminate 7 was prepared by laminating the reinforcing fiber fabric so as to have a quasi-isotropic orientation.

  Next, as shown in FIGS. 4 and 5, the auxiliary material 9 is arranged on the reinforcing fiber fabric laminate 7, the reinforcing fiber fabric laminate 7 and the auxiliary material 9 are covered with the sealing medium 8, and the inside of the sealing medium 8 Was vacuumed to reduce the pressure, and the reinforcing fiber fabric laminate 7 was shaped by applying atmospheric pressure. The material of the sealing medium 8 was a rubber made of silicon.

  Next, in the hot compaction process, while maintaining the state shown in FIG. 5 in which atmospheric pressure is applied to the reinforcing fiber fabric laminate 7, the reinforcing fiber fabric laminate 7 is heated to 80 ° C. in an oven to bond the reinforcing fiber fabrics. Thus, a preform 9 was manufactured. The preform 9 and the reinforcing member 5 thus obtained were bonded via an adhesive 6.

  Next, in the resin injection impregnation step shown in FIG. In the sealing medium, the auxiliary material 12a for securing the flow path of the matrix resin, the auxiliary material 12b for stabilizing the flow rate, and the auxiliary material 12c for flowing the matrix resin into the sealing medium are arranged. The material of the sealing medium 10 was a film made of nylon. The inside of the sealing medium 10 is depressurized by vacuum suction, and the inside of the sealing medium 10 is utilized using atmospheric pressure in a state where the inside of the sealing medium 10 and the space between the reinforcing member 5 and the cutout portion 4 are sealed. Then, the matrix resin 11 was injected to impregnate the preform 9 with the matrix resin 11. The material of the matrix resin 11 was an epoxy resin. During the resin injection impregnation step, heating was performed so that the temperature of the reinforcing fiber fabric laminate 7 and the matrix resin 11 was maintained at 70 ° C.

  Next, in the resin curing step, the matrix resin 11 impregnated in the preform 9 is heated and cured, and at the same time, the reinforcing member 5 and the preform 9 are bonded and integrated through the matrix resin 11, as shown in FIG. A fiber-reinforced plastic structure 14 in which a reinforcing member 5 was integrated was manufactured. The cross-sectional view of FIG. 10 is as shown in FIG.

(Comparative Example 1)
The same mold was used except that the notch for reinforcing member arrangement was removed from the mold used in Example 1. Except for the step of placing the reinforcing member and the adhesive, the same steps as the placement step of the reinforcing fiber fabric laminate, the shaping step, the hot compaction step, the resin injection impregnation step, and the resin curing step are performed. A reinforced plastic member was molded. The reinforcing member attachment position surface of the molded fiber reinforced plastic member was sanded, and a T-shaped reinforcing member-shaped preform was placed through the adhesive used in Example 1. Next, the reinforcing member is covered with a sealing medium along the shape of the reinforcing member, the resin injection impregnation step and the resin curing step similar to those in Example 1 are performed, the reinforcing member and the reinforcing fiber plastic member are bonded and integrated, and the reinforcing member Fabricated fiber reinforced plastic structure.

  In the step of arranging the reinforcing member, it was confirmed that the reinforcing member could not be fixed at the mounting position only by arranging the reinforcing member. Moreover, after covering the reinforcing member with the sealing medium, it was confirmed that the reinforcing member was detached from the attachment position. In order to fix the reinforcing member at the mounting position, a jig for fixing the reinforcing member is required.

  In the step of covering the reinforcing member with the sealing medium, it was confirmed that if the sealing medium did not follow the shape of the reinforcing member, the sealing medium was stretched and the sealing medium was damaged from the stretched portion. Further, the work time required for placing the sealing medium along the shape of the reinforcing member was 60 minutes.

  The present invention can be applied not only to airplanes, ships, and automobiles, but also to industrial uses and sports uses, but the application range is not limited thereto.

It is a figure which shows the shaping | molding die of this invention. It is a figure which shows the reinforcement member arrangement | positioning process (process (A)) of this invention. It is a figure which shows the arrangement | positioning process (process (B)) of the reinforced fiber fabric laminated body of this invention. It is a figure which shows the step which starts the shaping process (process (C)) of this invention. It is a figure which shows the step which complete | finishes the shaping process (process (C)) of this invention. It is a figure which shows the resin injection | pouring impregnation process (process (E)) of this invention. It is a figure of the arrangement | positioning process (process (B)) of the reinforced fiber fabric laminated body which shows the arrangement position of the adhesive material of this invention. It is a figure which shows the arrangement | positioning process of the sealing material of this invention. It is a figure which shows the fiber reinforced plastic structure of this invention. It is a figure which shows the cross section of the reinforcement member width direction of the fiber reinforced plastic structure of this invention.

Explanation of symbols

:
DESCRIPTION OF SYMBOLS 1: Molding die 2: Convex part 3: Flat plate part 4: Notch part of shaping | molding die 5: Reinforcing member 6: Adhesive 7: Reinforcement fiber fabric laminated body 8: Sealing medium 9: Preform 10: Sealing medium 11: Matrix Resins 12a to 12c: Sub-material 13: Sealing material 14: Fiber reinforced plastic structure

Claims (7)

In the manufacturing method of the fiber reinforced plastic structure which has a reinforcement member, the manufacturing method of the fiber reinforced plastic structure characterized by including the process of following (A)-(F).
(A) The reinforcing member arrangement | positioning process which arrange | positions a reinforcing member in the notch part which is located in the upper surface of the shaping | molding die which is a convex type, and is a concave type .
(B) A reinforced fiber fabric laminate in which a laminate made of a reinforced fiber fabric having a thermoplastic resin and / or a thermosetting resin on its surface is disposed on the upper surface of the mold so as to cover at least a part of the reinforcing member. Placement process.
(C) A shaping step of covering the reinforcing fiber fabric laminate with a sealing medium, vacuuming the inside of the sealing medium to reduce the pressure, and applying the atmospheric pressure to the reinforcing fiber fabric laminate.
(D) (C) Reinforcing fiber through the thermoplastic resin and / or thermosetting resin on the surface of the reinforcing fiber cloth by heating the reinforcing fiber cloth laminate in the forming step while applying atmospheric pressure. A hot compaction process in which a preform is produced by adhering between fabrics.
(E) The preform is covered with a sealing medium, the inside of the sealing medium is vacuumed to reduce the pressure, and in the sealed state, the matrix resin is injected into the inside of the sealing medium using atmospheric pressure, A resin injection impregnation step in which a preform is impregnated with a matrix resin.
(F) A resin curing step in which the matrix resin impregnated in the preform is heated and cured, and at the same time, the fiber reinforced plastic structure composed of the reinforcing member and the preform is bonded and integrated through the matrix resin. (B) The manufacturing method of the fiber reinforced plastic structure of Claim 1 which arrange | positions an adhesive agent between the said reinforcement member and the said reinforced fiber fabric in an arrangement | positioning process. (D) The hot compaction step, wherein the reinforcing member and the preform are bonded via a thermoplastic resin or / and a thermosetting resin on the surface of the reinforcing fiber fabric, or the adhesive. A method for producing a fiber reinforced plastic structure. (E) The method for producing a fiber-reinforced plastic structure according to any one of claims 1 to 3, wherein a space between the reinforcing member and the cutout portion is sealed when sealed with a sealing medium in the resin injection impregnation step. . (E) In the resin injection impregnation step, when a sealing material is arranged in advance between the reinforcing member and the cutout portion and sealed with a sealing medium, the space between the reinforcing member and the cutout portion is sealed. The manufacturing method of the fiber reinforced plastic structure in any one of Claims 1-4. The manufacturing method of the fiber reinforced plastic structure in any one of Claims 1-5 whose said reinforcement member is a fiber reinforced plastic. (C) The manufacturing method of the fiber reinforced plastic structure in any one of Claims 1-6 whose sealing medium used at a shaping process is a rubber sheet.

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