JP2014000738A - Method of manufacturing molded fiber-reinforced resin article, and elastic body molding die used for manufacture of the molded fiber-reinforced resin article - Google Patents

Abstract

A method for producing a fiber reinforced resin molded article capable of forming good surface properties while maintaining strength and an elastic body mold used for producing the fiber reinforced resin molded article are provided.
A method for manufacturing a fiber reinforced resin molded article 100 according to the present embodiment includes a step of laminating reinforcing fibers on a mold by a laminating step, and then attaching an elastic body mold 200 to the surface of the reinforcing fiber layer 105. The inside of the airtight film (film bag 180) is decompressed by the decompression step, and the reinforcing fiber layer 105 is impregnated with the matrix resin.
[Selection] Figure 1

Description

  The present invention relates to a method for producing a fiber-reinforced resin molded article and an elastic body mold used for producing the fiber-reinforced resin molded article.

  Fiber reinforced resin molded products are used in various industrial fields because they are lightweight and have high strength. Recently, attention has been focused on an infusion molding method having excellent environmental considerations as a method for producing a fiber-reinforced resin molded product.

  For example, Patent Document 1 (Japanese Patent Application Laid-Open No. 2009-255472) discloses an infusion molding that can be performed easily and accurately and can be commercialized without end treatment of the obtained molded product. A mold and a method for producing a cylindrical fiber reinforced resin molded article using the mold are disclosed.

  In the infusion molding mold described in Patent Document 1, a cylindrical or columnar body mold having a mold body portion whose outer peripheral surface is a mold surface, and axial ends of the mold body portion of the body mold are attached. And two end surface molds, the size of which is attached to the end surface of the mold main body portion so that the periphery of the mold main body portion protrudes from the periphery of the mold main body portion, and a cylinder made of reinforcing fibers along the mold surface of the main body mold With the reinforced fiber layer in the shape of a cover, cover the periphery of the reinforced fiber layer and the outer peripheral surface of both end surfaces with an airtight film, hold the reinforced fiber layer in the airtight space, and then decompress the airtight space. In addition, there is provided a mold for infusion molding in which a matrix resin is supplied into the airtight space in a reduced pressure state so that the reinforcing fiber layer is impregnated with the matrix resin. Ridges above And having one end face mold provided with a resin injection port for supplying a matrix resin supplied from outside the mold to the reinforcing fiber layer via a resin flow path provided inside the end face mold. The other end face mold is provided with an end face. An intake port is provided for sucking and exhausting air in the airtight space to the outside of the mold through an intake passage provided inside the mold.

  Patent Document 2 (Japanese Patent Application Laid-Open No. 2011-79283) discloses a method for joining cylindrical members that are free from wrinkles, have a good appearance, and retain strength, and a method for forming a cylindrical molded body. Yes.

  In the joining method of the cylindrical member described in Patent Document 2, it is a joining method of the cylindrical member that joins the end surfaces of the substantially cylindrical members to each other, and the end surface of the substantially cylindrical member that abuts the reinforcing fiber base. Along the outer peripheral surface of the joint portion of the cylindrical member, over the outer peripheral surface of the cylindrical members, the step of covering the reinforcing fiber base material with a bag film and sealing the outer peripheral surface, and sealing the outer peripheral surface Including a step of sucking and injecting a flowable resin, and a step of curing or solidifying the injected resin, wherein the reinforcing fiber base is circumferentially along the outer peripheral surface of the joint and A plurality of sheet-like objects arranged while shifting the position in the horizontal direction, one end in the circumferential direction is bonded, and the other end in the circumferential direction is arranged so as to overlap the outer surface of another adjacent sheet-like object Then, it is overlaid along the circumferential direction of the joint Than is.

JP 2009-255472 A JP 2011-079283 A

As described above, the inventions in Patent Documents 1 and 2 have very significant effects as disclosed.
In general, in fiber reinforced resin molded products using the infusion molding method, wrinkles are generated on the final product surface, and good surface properties cannot be obtained. Have gained.

  However, if processing is performed after forming a fiber reinforced resin molded product in order to form good surface properties, the reinforced fiber layer may be damaged, and the strength of the fiber reinforced resin molded product may be reduced. is there.

  An object of the present invention is to provide a method for producing a fiber reinforced resin molded product capable of forming good surface properties while maintaining strength, and an elastic body mold used for producing the fiber reinforced resin molded product. It is.

(1)
In the method for manufacturing a fiber reinforced resin molded article according to one aspect, a lamination step of laminating a reinforcing fiber layer on a mold, and a surface of the reinforcing fiber layer laminated on the mold according to the outer shape of the molded article after molding An attachment step for attaching an elastic body mold so as to cover at least a part of the fiber layer, and a mold to which the elastic body mold is attached are covered with an airtight film, and the inside of the airtight film is decompressed to form a reinforcing fiber layer. And a decompression step for impregnating the matrix resin.

  The method for producing a fiber reinforced resin molded product according to the present invention includes laminating reinforcing fibers on a mold in a laminating step, then attaching an elastic body mold on the surface of the reinforcing fiber layer, and depressurizing the airtight film in a depressurizing step Then, the reinforcing fiber layer is impregnated with a matrix resin.

In this case, the elastic body mold can be elastically deformed and covered from the surface of the reinforcing fiber layer in the attaching step. Further, unlike the case where the matrix resin is impregnated using only an airtight film, it is possible to prevent the occurrence of a resin-rich portion or a portion where the resin is insufficiently filled, and post-processing is not required.
As a result, according to the method for producing a fiber-reinforced resin molded product, it is possible to obtain a fiber-reinforced resin molded product having good surface properties while maintaining strength.

(2)
According to a second aspect of the present invention, there is provided a method for producing a fiber-reinforced resin molded article, wherein the sheet-like member is arranged in the arrangement step after the lamination step and elastic in the attachment step. Install body mold.

  In this case, since the sheet-like member is provided, the flatness of the fiber-reinforced resin molded product or the surface property of the curved surface can be improved. Here, flatness generally represents a space between two parallel planes. Therefore, the flatness of the fiber-reinforced resin molded product means the difference between the most convex part and the most concave part in the plane. Similarly, the surface property of a curved surface means the difference between the most convex portion and the most concave portion on the curved surface.

(3)
The method for manufacturing a fiber-reinforced resin molded product according to the third invention is the method for manufacturing a fiber-reinforced resin molded product according to the second invention, wherein the disposing step has a different shape according to the outer shape of the molded product after molding. A plurality of sheet-like members are respectively arranged in different directions.

  In this case, even if the outer shape of the molded product has surfaces in different directions, a sheet-like member having a shape corresponding to the outer shape of the molded product can be used. The surface property can be improved. That is, good surface properties can be obtained even for molded products having multi-directional surfaces or complex molded products.

(4)
According to a fourth aspect of the present invention, there is provided a method for manufacturing a fiber-reinforced resin molded article according to the second or third aspect of the invention, wherein the disposing step includes placing a sheet-like member on the surface of the reinforcing fiber layer. On the other hand, they may be provided in an overlapping manner.

  In this case, by providing the sheet-like member in an overlapping manner, a fiber-reinforced resin molded product that prevents the occurrence of a molding step at the sheet-like end portion (connecting portion) can be obtained.

(5)
An elastic body mold used for manufacturing a fiber-reinforced resin molded article according to another aspect is an elastic body mold used for manufacturing a fiber-reinforced resin molded article, and an elastic material is applied to a base mold subjected to a release treatment. Is applied and cured.

  An elastic body mold used for manufacturing a fiber-reinforced resin molded article is formed by applying an elastic material to a base mold that has been subjected to a release treatment and curing it.

  In this case, since the elastic body mold used for manufacturing the fiber reinforced resin molded article is made of an elastic material, the elastic body mold can be elastically deformed and covered from the surface of the reinforcing fiber layer. In addition, since the elastic body mold does not require a draft angle for pulling out the mold, a right angle can be easily formed in the fiber reinforced resin molded product.

(6)
An elastic body mold used for manufacturing a fiber reinforced resin molded article according to a sixth aspect of the invention is an elastic body mold used for manufacturing a fiber reinforced resin molded article according to another aspect, and has a void prevention hole. It is what you have.

  In this case, since the elastic body mold used for the production of the fiber reinforced resin molded product has a void prevention hole, the generation of voids in the fiber reinforced resin molded product can be prevented. As a result, a fiber reinforced resin molded product maintaining strength can be obtained.

  As described above, according to the present invention, it is possible to obtain a fiber reinforced resin molded article having good surface properties while maintaining strength.

It is a typical perspective view which shows an example of a fiber reinforced resin molded product. It is a schematic diagram for demonstrating the manufacturing process of a fiber reinforced resin molded product. It is a schematic diagram for demonstrating the manufacturing process of a fiber reinforced resin molded product. It is a schematic diagram for demonstrating the manufacturing process of a fiber reinforced resin molded product. It is a schematic diagram for demonstrating the manufacturing process of a fiber reinforced resin molded product. It is a schematic diagram for demonstrating the manufacturing process of a fiber reinforced resin molded product. It is a schematic diagram for demonstrating the manufacturing process of a fiber reinforced resin molded product. It is a schematic diagram for demonstrating the manufacturing process of a fiber reinforced resin molded product. It is a schematic diagram for demonstrating the manufacturing process of a fiber reinforced resin molded product. It is a typical perspective view explaining an example of the manufacturing method which manufactures an elastic body shaping | molding die in this Embodiment. It is a typical perspective view explaining an example of the manufacturing method which manufactures an elastic body shaping | molding die in this Embodiment. It is a schematic diagram for demonstrating the other manufacturing method of the fiber reinforced resin molded product demonstrated in FIGS. It is a schematic diagram for demonstrating the other manufacturing method of the fiber reinforced resin molded product demonstrated in FIGS.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the same parts are denoted by the same reference numerals. Their names and functions are also the same. Therefore, detailed description thereof will not be repeated.

<Fiber-reinforced resin molded product>

  Hereinafter, the fiber reinforced resin molded product 100 according to the present embodiment will be described. FIG. 1 is a schematic perspective view showing an example of a fiber reinforced resin molded product 100.

As shown in FIG. 1, the fiber reinforced resin molded product 100 in the present embodiment is a pipe joint based on polyvinyl chloride, in which a reinforcing fiber layer is laminated on the polyvinyl chloride as the foundation.
Here, for the sake of explanation, a name is given to each part of the fiber reinforced resin molded product 100 of the pipe joint shown in FIG. The fiber reinforced resin molded product 100 of FIG. 1 has a cylindrical peripheral surface 100A, a flange surface 100B, and an outer peripheral surface 100C of the flange portion.
Further, a cylindrical hole 110 is formed inside the fiber reinforced resin molded product 100 made of a pipe joint.

<Method for producing fiber-reinforced resin molded article 100>
Next, a method for manufacturing the fiber reinforced resin molded product 100 will be described. 2 to 9 are schematic diagrams for explaining the manufacturing process of the fiber reinforced resin molded product 100. FIG.

(Primer application process)
First, primer coating for forming a base is applied to a flange 101 made of polyvinyl chloride (hereinafter abbreviated as PVC) having a cylindrical hole 110. As a result, as shown in FIG. 2, a primer layer 103 is formed on the PVC flange 101.
As a material for the primer application step, any other primer resin such as unsaturated polyester resin (manufactured by Nippon Yupica Co., Ltd., trade name “Yupika”, product number “8800”) may be used.

(Glass substrate mounting process)
Next, a reinforcing fiber material having a sheet shape or a tape shape is wound along the outer peripheral surface from the formation of the primer layer 103. In the present embodiment, the reinforcing fiber layer 105 is formed by winding a reinforcing fiber material so that the layer thickness L1 is about 6 mm. Further, as shown in FIG. 3, the cylindrical peripheral surface 100A and the outer peripheral surface 100C of the flange portion are formed by winding, and the flange surface 100B is formed by being laminated. As a result, the reinforcing fiber layer 105 made of the glass substrate shown in FIG. 3 is formed.
It should be noted that any other reinforcing fiber material such as glass fiber (manufactured by Knit Roving Easy Fab FR Service Co., Ltd.) may be used as the reinforcing fiber material in the glass substrate mounting step.
Further, a release cloth (not shown) or a resin diffusion medium (not shown) may be wound around the reinforcing fiber layer 105 as appropriate.

(Elastic body molding process)
Next, after forming the reinforcing fiber layer 105, as shown in FIG. Here, since the elastic body mold 200 is made of an elastic body such as urethane or silicone, it can be easily stretched and attached from the surface side of the reinforcing fiber layer 105.
Here, the reinforcing fiber layer 105 having a layer thickness L1 of 6 mm in the glass substrate mounting step is compressed by the elastic body mold 200 to a layer thickness L2 of 3 mm. That is, the reinforcing fiber layer 105 is clamped from the surface by the elastic body mold 200.

  Further, according to the outer shape in the present embodiment (including claim 1) means the surface of the reinforcing fiber layer 105 (105a) with respect to the flange 101 made of PVC, and a part of the reinforcing fiber layer 105 (105a). Or it means all the parts other than the cylindrical hole 110 of the flange 101 made of PVC.

(Decompression pretreatment process)
Subsequently, as a pre-reduction process step, as shown in FIG. 5, the reinforcing fiber layer 105 is reached from the outside of both side surfaces of the elastic body mold 200 through the deaeration holes 206 of the elastic body mold 200. Insert one end of the pipe 120 until it is attached.
Further, as shown in FIG. 6, the two pipes 120 have a role of an intake tube connected to an intake pipe connected to the vacuum pump 170.

Further, as shown in FIG. 5, a pipe guide 130 is provided on the upper surface of the cylindrical hole 110 of the PVC flange 101. A tube 131 is attached to the pipe guide 130. As shown in FIG. 6, the tube 131 is connected to a resin supply pipe connected to a matrix resin supply tank 160.
Moreover, the tube 131 is provided so that resin can be injected into the spiral tube 140 for resin injection attached below the pipe guide 130.

Further, a sealing plate 135 is provided on the lower surface of the cylindrical hole 110 of the PVC flange 101.
After performing the above steps, the PVC flange 101 to which the elastic body mold 200 is attached is accommodated in the film bag 180, and the ends of the pipe 120 and the tube 131 are taken out of the film bag 180. The inside of 180 is made airtight.
Further, a sealing material may be used to make the film bag 180 airtight. For example, a butyl rubber tape or the like may be used as the sealing material.

(Decompression treatment process)
Next, as shown in FIG. 7, in the decompression processing step, the vacuum pump 170 is driven, and the air in the film bag 180 is sucked (exhausted) in the direction of the arrow EX from the pipe 120 that is an intake tube, and the film bag 180 The inside is decompressed. As a result, as shown in FIG. 7, the film bag 180 contracts in the direction in which the elastic body mold 200 is tightened.

  By making the inside of the film bag 180 in a reduced pressure state, the matrix resin is supplied from the matrix resin supply tank 160 to the tube 131 toward the film bag 180 (in the direction of the arrow IN).

  As a result, the reinforcing fiber layer 105 is impregnated with the matrix resin through the resin-injecting spiral tube 140. As shown in FIG. 8, the reinforcing fiber layer 105 becomes a reinforcing fiber layer 105a impregnated with a matrix resin.

(Removal process)
The matrix resin impregnated in the reinforcing fiber layer 105a starts to generate heat and becomes hardened while being gelled. The vacuum pump 170 is stopped before complete hardening (solidification), and after the matrix resin is solidified. The decompression process is stopped (for example, after 24 hours).
Subsequently, the elastic body mold 200 is removed. As a result, the fiber reinforced resin molded product 100 shown in FIG. 9 can be obtained.

(Example of reinforcing fiber)
In the present embodiment, the reinforcing fiber used for forming the reinforcing fiber layer 105 is exemplified by a glass substrate, but is not limited thereto. For example, glass fiber, carbon fiber, aramid fiber, polyvinyl alcohol fiber. , Vinyl chloride fiber, acrylic fiber, polyester fiber, polyurethane fiber, polyethylene fiber, polypropylene fiber, polystyrene fiber, other organic synthetic fiber such as acetate fiber, other inorganic fiber such as metal fiber or natural fiber such as hemp and bamboo And regenerated fibers such as rayon. In particular, glass fiber, carbon fiber, and aramid fiber are suitable. Moreover, you may use the reinforcing fiber mentioned above in mixture of multiple types.

Further, the reinforcing fiber is roving, woven fabric, non-woven fabric, mixed paper, etc., threaded, matted, cloth-like, tape-like, or processed into a sheet-like shape, and then wound into a mold, for example The reinforcing fiber layer 105 may be formed.
The strength of the reinforcing fiber used and the reinforcing fiber density of the reinforcing fiber layer 105 may be appropriately selected from the strength and thickness (lamination amount) of the desired molded product.

(Example of matrix resin)
In the above embodiment, the matrix resin used is not particularly limited. For example, unsaturated polyester resin, acrylic resin, vinyl ester resin, alkyd resin, amino resin, epoxy resin, urethane resin, phenol resin. A thermosetting resin such as a silicone resin can be used.
Polyethylene resin, polypropylene resin, polystyrene resin, polybutadiene resin, styrene butadiene resin, polyacetal resin, polyamide resin, polycarbonate resin, polyphenylene ether resin, polyethylene terephthalate resin, polybutylene terephthalate resin, polyarylate resin, polystyrene resin, polyethersulfone Thermoplastic resins such as resin, polyimide resin, polyamideimide resin, polyphenylene sulfide resin, polyoxybenzoyl resin, polyetheretherketone resin, polyetherimide resin, and cellulose acetate resin can be used.

In addition, the matrix resin used in this embodiment preferably has a viscosity of 0.2 Pa · s or less in order to promote the impregnation of the reinforcing fiber layer 105. When the viscosity exceeds 0.2 Pa · s, it becomes difficult for the matrix resin to impregnate the reinforcing fiber layer 105, and the impregnation time becomes long, so that the productivity is lowered or impregnation failure is likely to occur.
Therefore, when the matrix resin to be used is a thermoplastic resin, the resin to be supplied may be heated in advance to be in a molten state and the viscosity may be lowered.
In consideration of coloring pigments, durability after molding, etc., an antioxidant, a flame retardant, a heat stabilizer, an ultraviolet absorber, a light stabilizer, or the like may be appropriately blended with the matrix resin.

(Example of film bag 180)
The airtight film bag 180 used in this embodiment may have any shape such as a bag film shape, a bag shape, a cylindrical shape, or a flange-corresponding shape.
The film bag 180 can secure an airtight state and is not particularly limited as long as the inner peripheral surface is in close contact with the peripheral surface of the elastic body molding die 200. For example, the material is polyethylene, polypropylene, polyvinyl chloride, polyamide, nylon resin. It may be made of a resin such as a film-like material.
In addition, the performance of the airtight film bag 180 is preferably a size that can accommodate the elastic body mold 200 and can ensure workability and airtightness during mounting.

  In this embodiment, if necessary, a release cloth for promoting peeling of the airtight film bag 180 or a matrix resin supplied in the space of the airtight film bag 180 is diffused and flowed. A resin diffusion medium that allows the reinforcing fibers of the reinforcing fiber layer 105 to be impregnated quickly and uniformly may be provided along the reinforcing fiber layer 105.

  Further, in addition to the resin diffusion medium, the reinforcing fiber layer 105 may be divided into a plurality of pieces in the thickness direction, and a resin diffusion medium made of the same material as the reinforcing fiber layer may be sandwiched between the divided layers. Further, the reinforcing fiber layer 105 may be uniformly and rapidly impregnated with a matrix resin, or a diffusion flow path in which the matrix resin flows while diffusing using a capillary phenomenon or the like may be provided. For example, a resin diffusion medium used for infusion molding (for example, trade name “Amirasu Flow” manufactured by Nittobo Co., Ltd.) may be used.

<Elastic body mold>
Hereinafter, the elastic body mold 200 used in the method for manufacturing the fiber-reinforced resin molded article 100 will be described. 10 and 11 are schematic perspective views for explaining an example of a manufacturing method for manufacturing the elastic body mold 200 in the present embodiment.

(Description of wooden mold 210)
As shown in FIGS. 10 and 11, a plurality of protrusions 215 and protrusions 216 are formed on the wooden mold 210.
The protrusion 215 is provided to form a void generation prevention hole 205 in the elastic body mold 200. Therefore, the protrusion 215 is provided in a portion where a void may occur in the final fiber reinforced resin molded product 100.
Further, the protrusion 216 is provided to form the hole 206 for inserting the pipe 120 of the intake tube described in FIG.

  Further, as shown in FIG. 11, the wooden mold 210 is formed with a size corresponding to the upper surface diameter L10 of the fiber reinforced resin molded product 100 of FIG. 9 and the lower surface diameter L11 of the flange portion.

  In addition, one or both of the protrusion 215 and the protrusion 216 are not formed on the wooden mold 210, and the elastic body molding die 200 is formed in a state where one or both of the void prevention hole 205 and the deaeration hole 206 are not formed. After that, a void generation prevention hole 205 and / or a deaeration hole 206 may be formed by post-processing.

(Manufacturing method for manufacturing the elastic body mold 200)
As shown in FIG. 10, a mold release process is performed using a spray 230 on the surface of the wooden mold 210. After the mold release treatment, the elastic material is applied to the wooden mold 210 with a certain thickness using the spray 240 (spray-up method).
Specifically, the constant thickness of the elastic material is desirably about 1 mm to 5 mm, and more preferably about 3 mm.

  Then, after the applied elastic body material is completely cured, the elastic body mold 200 is removed from the wooden mold 210. In this case, since the elastic body mold 200 has elastic deformation, it can be easily removed even when the protrusions 215 and 216 are present.

  Note that silicone, urethane elastomer, or the like can be used as the elastic material.

Moreover, it is preferable that the elastic body material for forming the elastic body shaping | molding die 200 is the range whose hardness by durometer A (JIS K6301) is 20 or more and 75 or less.
For example, if the durometer A (JIS K6301) hardness is less than 20 or greater than 75, there is a problem that the mold cannot be sufficiently clamped (clamped) after the mounting process of the elastic body mold 200.

Furthermore, the elongation at break is preferably in the range of 150% to 600% when the basic length is 100.
For example, when the elongation at cutting is less than 150%, it is difficult to mount the elastic body mold 200 in the elastic body mold mounting process. Further, if the elongation at cutting is larger than 600%, there is a problem that the mold cannot be sufficiently clamped (clamped) after the mounting process of the elastic body molding die 200.

The tear strength is preferably 3 kN / m or more and 25 kN / m or less.
For example, if the tear strength is less than 3 kN / m, the elastic body mold 200 may be torn when the elastic body mold 200 is mounted on the reinforcing fiber layer 105 in the elastic body mold mounting step. . Further, if it is larger than 25 kN / m, the elastic body mold 200 itself becomes hard, so that there arises a problem that it cannot be sufficiently clamped (clamped) after the mounting process of the elastic body mold 200.

  The elastic modulus is preferably 0.5 Mpa or more and 100 Mpa or less, more preferably 5 Mpa or more and 100 Mpa or less, and more preferably 5 Mpa or more and 35 Mpa or less.

In this embodiment, the elastic material is applied by the spray 240. However, the present invention is not limited to this, and application or the like may be performed using any tool or equipment such as brush.
Further, the elastic body mold 200 may be formed by injection molding or the like. Moreover, although the wooden mold 210 is used, it is not limited to this, and other arbitrary materials and materials such as hard urethane may be used.

<Other manufacturing method of fiber reinforced resin molded article 100>
Next, FIG. 12 and FIG. 13 are schematic diagrams for explaining another manufacturing method of the fiber-reinforced resin molded product 100 described in FIG. 2 to FIG. 9.

  As shown in FIG. 12 and FIG. 13, in another manufacturing method of the fiber reinforced resin molded article 100, after the glass base material mounting step shown in FIG. 3, the elastic body mold mounting step shown in FIG. Before, a sheet material attachment process is added.

(Sheet material installation process)
First, in the sheet material mounting step, a sheet member 300A formed corresponding to the cylindrical peripheral surface 100A of the fiber reinforced resin molded article 100 made of a flange joint, a sheet member 300B formed corresponding to the flange surface 100B, and A sheet member 300C formed corresponding to the outer peripheral surface 100C of the flange portion is used.

Here, in this embodiment, a polyethylene sheet having a thickness of 0.25 mm is used as the sheet members 300A, 300B, and 300C.
Note that the sheet members 300A, 300B, and 300C may be made of any member such as a thermoplastic resin sheet or thermosetting resin sheet of 0.1 mm to 1.0 mm, and other highly rigid metal plates.

  And as shown in FIG. 13, after attaching sheet member 300A, 300B, 300C, the elastic body shaping | molding die 200 is mounted | worn. The manufacturing method after mounting the elastic body mold 200 is the same as the manufacturing method shown in FIGS.

  Here, as shown in FIG. 12, the sheet member 300A and the sheet member 300C are formed by winding a belt-like (long) sheet. Also, as shown in FIG. 12, the sheet member 300A and the sheet member 300C are formed by partially overlapping (superimposing) VR.

That is, when the sheet member is mounted without being partially overlapped with VR, and a matrix resin is impregnated and cured, a step is formed in the cut of the sheet member.
However, in the sheet member 300A and the sheet member 300C, by partially overlapping the VR, even when the matrix resin is impregnated and cured, the occurrence of a step can be prevented. As a result, it is possible to obtain a fiber reinforced resin molded article 100 having good surface properties.

Further, the overlapping dimension of the part VR is preferably in the range of 1 mm to 50 mm, and more preferably 10 mm to 30 mm.
If the overlap size of a part of VR is smaller than 1 mm, the reinforcing fiber layer 105 mounted in the glass substrate mounting process is not loaded and hardly responds to variations in the winding thickness (outer diameter). There is a risk of breakage.
Also, if the size of the overlap of the part VR is larger than 50 mm, the friction of the part of the VR overlap in the decompression process increases, and the uniform diameter reduction cannot be performed, and wrinkles may occur.

  The sheet member 300A preferably has a width L30 (L31 <L30) with respect to the height L31 of the cylindrical peripheral surface 100A shown in FIG. In this case, since the width L30 of the sheet member 300 is longer than the height L31 of the cylindrical peripheral surface 100A, a portion longer than the height L31 of the width L30 is used as a guide when the elastic body molding die 200 is attached. The elastic body mold 200 can be easily put into the mold.

  In the above embodiment, since the shape of the fiber reinforced resin molded product 100 is determined by winding the reinforcing fiber layer 105 around the molding die, it can be molded in either a cylindrical shape or a rectangular tube shape. Can also be used to manufacture products. For example, the present invention can be applied to a pipe joint having no flange, an elbow-type (L-shaped) joint, a cheese-shaped (T-shaped) joint, and other arbitrary shaped products.

Example 1
Next, the elastic body mold 200 described in the above embodiment was manufactured, and the fiber reinforced resin molded article 100 was molded using the elastic body mold 200.

  As shown in FIG. 10 and FIG. 11, a wood mold of a fiber reinforced resin molded product 100 as a final object was manufactured. The surface of the wooden mold was subjected to a release treatment, and the elastic material was applied in a thickness of 3 mm by spray-up to the wooden mold subjected to the release treatment.

  As the elastic material in Example 1, silicone (KE-14 Durometer A (JIS K6301) 30 cut elongation 280%, tear strength 3 kN / m, manufactured by Shin-Etsu Chemical Co., Ltd.) was used.

  Using the formed elastic body mold 200, a fiber reinforced resin molded product was manufactured using the method for manufacturing a fiber reinforced resin molded product shown in FIGS. As a result, generation of wrinkles was prevented and good surface properties could be obtained.

(Example 2)
Next, the elastic body mold 200 described in the above embodiment was manufactured, and the fiber reinforced resin molded article 100 was molded using the elastic body mold 200.

  As shown in FIG. 10 and FIG. 11, a wooden mold of a resin molded product is manufactured, a release treatment is performed on the surface of the wooden mold, and an elastic material is sprayed on the wooden mold subjected to the release treatment to increase the thickness. It was applied at 3 mm.

  As an elastic material, urethane elastomer (composition ratio of Vitec TP PU 0308 manufactured by Sumika Bayer Urethane Co., Ltd. and Death Module TP PU 0309 is 100: 77 Durometer A (JIS K6301) 60 or more and 75 or less Cutting elongation 350% Tear strength 13 kN / m) was used.

  Using the formed elastic body mold 200, a fiber reinforced resin molded product was manufactured using the method for manufacturing a fiber reinforced resin molded product shown in FIGS. As a result, generation of wrinkles in the fiber reinforced resin molded product was prevented, and good surface properties could be obtained.

(Example 3)
Subsequently, in Example 3, sheet members 300A, 300B, and 300C are formed using a polyethylene sheet (PE sheet) having a thickness of 0.25 mm shown in FIGS. 12 and 13, and a fiber-reinforced resin molded product is molded. did. The part VR (overlapping) of the sheet members 300A and 300C was 10 mm.

  As a result, good surface properties could be obtained in the fiber-reinforced resin molded product.

  As described above, in the manufacturing method of the fiber reinforced resin molded product 100 and the elastic body mold 200 used for manufacturing the fiber reinforced resin molded product 100 according to the present invention, the elastic body mold 200 is elastically deformed by the attaching step. Thus, the surface of the reinforcing fiber layer 105 can be covered. As a result, the mold clamping force in the decompression step can be increased.

Also, unlike the case where the matrix resin is impregnated using only the film bag 180, it is possible to prevent a resin-rich portion in the reinforcing fiber layer 105a or a portion with insufficient resin filling from occurring, and no post-processing is required. It becomes.
As a result, according to the manufacturing method of the fiber reinforced resin molded product 100, it is possible to obtain the fiber reinforced resin molded product 100 having good surface properties while maintaining the strength.

  Further, as shown in other examples, since the sheet members 300A, 300B, and 300C are provided, the flatness of the fiber reinforced resin molded product 100 or the surface property of the curved surface can be improved. Furthermore, the fiber reinforced resin molded article 100 in which the sheet members 300 </ b> A and 300 </ b> C are partially overlapped with each other so as to prevent the formation of a level difference on the end portion (connecting portion) of the sheet members 300 </ b> A and 300 </ b> C. Can be obtained.

Further, as shown in FIGS. 10 and 11, since the elastic body mold 200 is made of an elastic material, the elastic body mold 200 can be elastically deformed and covered from the surface of the reinforcing fiber layer 105. Moreover, since the elastic body shaping | molding die 200 does not require the draft for extracting a type | mold, the right angle can be easily made in the fiber reinforced resin molding 100. FIG. In the elastic body mold 200, a draft may be provided at about 2 degrees or about 3 degrees.
Furthermore, since the elastic body mold 200 has the voids 205 for preventing the generation of voids, the generation of voids in the fiber reinforced resin molded product 100 can be prevented. As a result, the fiber reinforced resin molded product 100 maintaining the strength can be obtained.

Note that the deaeration hole 206 may not be formed in the elastic body mold 200, and instead of the circular hole of the deaeration hole 206, any other arbitrary shape such as a notch or a semicircular shape may be used. It may consist of a shape.
Furthermore, although the elastic body mold 200 has been described with respect to the case where it covers at least the entire reinforcing fiber layer 105, the present invention is not limited to this, and only the cylindrical peripheral surface 100A, only the outer peripheral surface 100C of the flange portion, the cylindrical peripheral surface 100A, and the flange The surface 100B, the flange surface 100B, and the outer peripheral surface 100C may be covered only between the cylinder peripheral surface 100A and the flange surface 100B, or only between the flange surface 100B and the outer peripheral surface 100C of the flange portion.

  In the present embodiment, the PVC flange 101 corresponds to the mold, the reinforcing fiber layers 105 and 105a correspond to the reinforcing fiber layer, the glass substrate mounting process corresponds to the lamination step, and the elastic body mold 200 Corresponds to the elastic body mold, the elastic body mold mounting process corresponds to the attachment step, the film bag 180 corresponds to the airtight film, the decompression process process corresponds to the decompression step, and the matrix resin corresponds to the matrix resin. 1 to 9 and FIGS. 12 and 13 correspond to the manufacturing method of the fiber-reinforced resin molded product, the sheet members 300A, 300B, and 300C correspond to the sheet-like members, and the sheet material is mounted. The process corresponds to the disposing step, part VR corresponds to the overlap, the wooden mold 210 corresponds to the base mold, and the void prevention hole 205 is the void prevention hole. Corresponding to the holes 206 corresponds to the intake hole, fiber-reinforced resin molded article 100 corresponds to a fiber-reinforced resin molded article.

  A preferred embodiment of the present invention is as described above, but the present invention is not limited thereto. It will be understood that various other embodiments may be made without departing from the spirit and scope of the invention. Furthermore, in this embodiment, although the effect | action and effect by the structure of this invention are described, these effect | actions and effects are examples and do not limit this invention.

DESCRIPTION OF SYMBOLS 100 Fiber reinforced resin molded product 101 PVC flange 105 Reinforced fiber layer 180 Film bag 200 Elastic body mold 205 Hole (void generation prevention)
206 holes (intake holes)
210 Wooden 300A, 300B, 300C Sheet member VR Partial

Claims (6)

A laminating step of laminating a reinforcing fiber layer on a mold;
An attachment step of attaching an elastic body mold on the surface of the reinforcing fiber layer laminated on the mold so as to cover at least a part of the reinforcing fiber layer according to the outer shape of the molded product after molding,
And a decompression step of covering the mold with the elastic body mold with an airtight film, depressurizing the inside of the airtight film, and impregnating the reinforcing fiber layer with a matrix resin. Manufacturing method of reinforced resin molded product. After the lamination step,
A disposing step of disposing a sheet-like member on the reinforcing fiber layer laminated on the mold;
2. A fiber reinforced resin according to claim 1, further comprising an attaching step of attaching an elastic body mold formed in accordance with the outer shape of the molded product after molding to the mold having the sheet-like member disposed thereon. Manufacturing method of molded products. The arranging step includes
The method for producing a fiber-reinforced resin molded product according to claim 2, wherein a plurality of sheet-like members having different shapes are arranged in different directions according to the outer shape of the molded product after molding.   4. The fiber-reinforced resin molded article according to claim 2, wherein in the arranging step, the sheet-like member is arranged so as to overlap the surface of the reinforcing fiber layer laminated on the mold. Manufacturing method. An elastic body mold used for manufacturing a fiber-reinforced resin molded article,
An elastic body mold used for manufacturing a fiber reinforced resin molded article formed by applying and curing an elastic material to a base mold subjected to a mold release treatment. The said elastic body shaping | molding die has the hole for void generation prevention, The elastic body shaping | molding die used for manufacture of the fiber reinforced resin molding of Claim 5 characterized by the above-mentioned.

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