JP7655165B2 - Method for manufacturing a joined part including fiber-reinforced resin - Google Patents

Description

This specification discloses a method for manufacturing a joint component in which a fiber-reinforced resin is joined to a substrate.

Joined parts in which fiber-reinforced plastic (FRP) is joined to a base material have been known for some time. For example, heterogeneous joined parts in which CFRP (carbon fiber reinforced plastic) is joined to a dissimilar base material such as a metal part are known.

When manufacturing joining parts, a fiber-reinforced resin material such as prepreg (pre-impregnated) is used. Prepreg is an intermediate material (in other words, a semi-finished product) made by impregnating a bundle of reinforcing fibers with uncured thermosetting resin and forming it into a sheet.

For example, in Patent Documents 1 and 2, the above-mentioned joined parts are manufactured using a vacuum bag method. Specifically, an adhesive layer such as a thermal adhesive film is laminated on the surface of a reinforcing member such as a vehicle bumper reinforcement. A prepreg is laminated on the adhesive layer. A release film is then laminated on the prepreg, and a breather cloth is laminated on the release film. The breather cloth is a member that serves as an air flow path during vacuuming, and is made of, for example, a nonwoven fabric of a specified thickness.

The laminate consisting of the adhesive layer, prepreg, release film, and breather cloth is then covered with a vacuum bag. The peripheral portion of the vacuum bag that surrounds the portion that covers the laminate is then attached (fixed) in a frame shape to the laminate surface of the substrate with adhesive tape or the like.

In this state, an operator operates the vacuum pump to remove the air from inside the vacuum bag through the degassing port, creating a vacuum. While this vacuum state is maintained, the substrate and laminate are placed in a molding furnace such as an autoclave and heated. During this process, the thermosetting resin contained in the prepreg hardens. During this heating process, the adhesive layer also melts, bonding (adhering) the prepreg and substrate together.

JP 2020-19307 A JP 2001-47507 A

However, the vacuum bag may thermally shrink during the heating process. During this shrinkage process, wrinkles may appear on the vacuum bag, and these wrinkles may be transferred to the fiber-reinforced resin. For example, the wrinkled shape of the vacuum bag may be transferred to the resin while it is being heat-cured, i.e. while it is still soft, resulting in grooves (streaks) on the surface of the fiber-reinforced resin after heat curing, which may impair the appearance quality.

Therefore, this specification discloses a method for manufacturing a joining part containing fiber-reinforced resin that can suppress the transfer of wrinkles that occur in a covering member such as a vacuum bag to the fiber-reinforced resin.

The method for manufacturing a bonded part containing fiber-reinforced resin disclosed in this specification includes the steps of: applying an adhesive to the surface of a substrate; laminating a prepreg, in which reinforcing fibers are impregnated with an uncured thermosetting resin, on the adhesive; applying a rigid plate to the prepreg, and covering the laminate containing the adhesive, the prepreg, and the rigid plate with a covering member; drawing a vacuum inside the interior covered with the covering member; and heat treating the substrate, the vacuum-drawn covering member, and the laminate covered with the covering member.

According to the above configuration, a rigid plate is inserted between the prepreg and the covering member, so even if wrinkles occur in the covering member, they are prevented from being transferred to the prepreg.

In the above configuration, the rigid plate may have the same thermal expansion coefficient as the fiber-reinforced resin from which the prepreg is cured.

When heat treatment is performed under conditions where the laminate is vacuumed and each component is restrained, there is a possibility that each component may deform due to thermal expansion. By using a material for the rigid plate that has the same thermal expansion coefficient as the fiber reinforced resin from which the prepreg is cured, the deformation modes of the fiber reinforced resin and the rigid plate, particularly after the prepreg is cured, become substantially equal. By making the deformation modes substantially equal, bias in the distribution of surface pressure between the rigid plate and the fiber reinforced resin due to differences in deformation is suppressed.

In the above configuration, the rigid plate may be a fiber-reinforced resin made by hardening prepreg.

According to the above configuration, the rigid plate is made of fiber-reinforced resin in which the prepreg has been cured, i.e., the finished product. With this configuration, the rigid plate can be used as an upper mold when molding the fiber-reinforced resin, so the prepreg and the fiber-reinforced resin after curing can be molded following the shape of the upper mold.

In the above configuration, the step of placing the adhesive may include a step of placing the substrate in a mold having a chamber with an opening at the top. In this case, the mold is provided with a degassing port for drawing a vacuum inside the chamber during the step of drawing a vacuum.

When a degassing port is provided in a covering member such as a vacuum bag, there is a risk that the covering member will thermally shrink during heat treatment, resulting in the degassing port becoming detached from the covering member. In contrast, in the above configuration, the degassing port is provided in the mold, which prevents the port from becoming detached during heat treatment.

In the above configuration, the covering member and the rigid plate may be integrated.

With the above configuration, the work of placing the rigid plate on the prepreg and the work of covering the laminate with the covering material can be performed at the same time, shortening the work time.

The manufacturing method for joining parts containing fiber-reinforced resin disclosed in this specification makes it possible to prevent wrinkles that occur in a covering member such as a vacuum bag from being transferred to the fiber-reinforced resin.

1A to 1C are diagrams illustrating a joined component manufactured by the method according to the present embodiment. FIG. 2 is an exploded perspective view illustrating materials, processing tools, and the like used in manufacturing the joining component according to the present embodiment. This is a cross-sectional view taken along line AA in FIG. 8A to 8C are diagrams illustrating a manufacturing process (1/8) of the joined component according to the present embodiment. 11A to 11C are diagrams illustrating a manufacturing process (2/8) of the joined component according to the present embodiment. 11A to 11C are diagrams illustrating a manufacturing process (3/8) of the joined component according to the present embodiment. 11A to 11C are diagrams illustrating a manufacturing process (4/8) of the joined component according to the present embodiment. 13A to 13C are diagrams illustrating a manufacturing process (5/8) of the joined component according to the present embodiment. FIG. 9 is a diagram showing another example of FIG. 8 . 13A to 13C are diagrams illustrating a manufacturing process (6/8) of the joined component according to the present embodiment. 13A to 13C are diagrams illustrating a manufacturing process (7/8) of the joined component according to the present embodiment. 8A to 8C are diagrams illustrating a manufacturing process (8/8) of the joined component according to the present embodiment.

The following describes a method for manufacturing a joint component containing fiber-reinforced resin according to an embodiment, with reference to the drawings. The shapes, materials, quantities, and values described below are examples for explanatory purposes and can be changed as appropriate depending on the specifications of the joint component to be manufactured. In addition, the same reference numerals are used for equivalent elements in all drawings below.

<Materials and processing supplies for joining parts>
1 illustrates a joint component 120 manufactured by the manufacturing method according to the present embodiment. The joint component 120 is configured by joining a fiber reinforced resin 125 to a vehicle component 20, which is a base material.

The vehicle components 20 are, for example, vehicle frame members and their reinforcing members, and are required to have a certain level of rigidity to withstand collision loads. Examples of frame members include pillars, side members, rockers, etc., and examples of reinforcing members include bumper reinforcements. The vehicle components 20 are made of, for example, metal materials such as high tensile steel and light metals.

By using the joint parts 120, which are made of dissimilar joint parts of metal parts and fiber-reinforced parts such as CFRP, as the frame members and reinforcing members of the vehicle, it is possible to reduce the weight while maintaining the load-bearing capacity, compared to the case of metal parts alone.

For example, if the vehicle component 20 is a front bumper reinforcement, the front surface to which the load is first input during a frontal collision (head-on impact) becomes the joining surface 22 to which the fiber-reinforced resin 125 is joined.

As described later, in the manufacturing method of the joining part 120 according to the present embodiment, a heating process is performed. The fiber reinforced resin 125 is a mixed material of reinforcing fibers and resin, and the thermal expansion coefficient differs depending on the material. For example, when carbon fibers are used as the reinforcing fibers, it is known that the thermal expansion coefficient is about -1×10 ^-6 /°C to -3×10 ^-6 /°C (i.e., it shrinks when heated). On the other hand, when epoxy resin is used as the resin, it is known that the thermal expansion coefficient is about 15×10 ^-6 /°C to 45×10 ^-6 /°C. These thermal expansion coefficients are reflected to determine the thermal expansion coefficient of the entire fiber reinforced resin 125. For example, when the fiber reinforced resin 125 is carbon fiber reinforced resin (CFRP), the thermal expansion coefficient is about -1.5×10 ^-6 to 0.5×10 ^-6 .

Figure 2 shows examples of processing tools and materials used in the manufacturing method for the joining part according to this embodiment. Materials for the joining part 120 include a vehicle part 20 as a base material, an adhesive film 30, and a prepreg 40.

The processing tools used in the manufacturing method according to this embodiment include a mold 10, a release film 50, a breather cloth 60, a plate 70 (rigid plate), and a bag film 80 (covering member). The manufacturing equipment used in the manufacturing method according to this embodiment includes a vacuum pump 100 and an autoclave 110 (see FIG. 12), which is a molding furnace.

For ease of explanation, the adhesive film 30, prepreg 40, release film 50, breather cloth 60, and plate 70 are collectively referred to as laminate 150. The laminate 150 and bag film 80 have a rectangular shape, for example, in the unfolded state.

The molding die 10 is a metal mold made of a metal material such as stainless steel. The molding die 10 is, for example, box-shaped, and has a chamber 11 that is open at the top. The vehicle part 20, which is the base material, is housed in the chamber 11.

For example, the chamber 11 is divided by multiple partitions, and can accommodate multiple vehicle parts 20. For example, in the example of FIG. 2, four vehicle parts 20 are accommodated in the chamber 11. Furthermore, an adhesive film 30 and a prepreg 40 are laminated and bonded onto the joining surface 22 of each vehicle part 20.

Figure 3 illustrates an example of the A-A cross section of Figure 2. A plurality of support protrusions 14 are formed on the inner side surface 12 and inner bottom surface 13 of the chamber 11. The vehicle part 20 is supported by these support protrusions 14. Furthermore, by providing the support protrusions 14, a clearance 17 (gap) is formed between the vehicle part 20 and the inner side surface 12 and inner bottom surface 13. Furthermore, a degassing path 15 is provided in the inner bottom surface 13. As described later, by providing the clearance 17, the chamber 11 and the internal space of the bag film 80 are connected to each other, and as a result, the inside of the bag film 80 can be evacuated via the degassing path 15.

The lower end of the degassing passage 15 is formed with a degassing port 16 and is connected to a vacuum pipe 102. Since the connection mechanism between the degassing port 16 and the vacuum pipe 102 is known, the detailed structure is not shown in Figure 3 etc.

The vacuum pipe 102 is connected to a vacuum pump 100 (see FIG. 2). As described below, a part of the vacuum pipe 102 (the part on the mold side) is housed in an autoclave 110 (see FIG. 12), which is a molding furnace. As described below, the inside of the autoclave 110 is subject to high temperature and pressure, so the vacuum pipe 102 is made of, for example, a heat-resistant and load-bearing material. For example, the vacuum pipe 102 is made of a flexible pipe made of SUS material or the like.

Referring to Figures 2 and 3, the adhesive film 30 is a film-like adhesive, and is composed of, for example, a thermoplastic adhesive film (hot melt adhesive film). The dimensions of the adhesive film 30 are set so that they are smaller than the joining surface 22 and equal to or smaller than the prepreg 40. For example, the length and width of the adhesive film 30 and the prepreg 40 are set so that they are equal.

In the following, when describing the dimensions of each processing tool or material, "length" refers to the dimension in the X-axis direction (longitudinal dimension) in Figure 2. "Width" refers to the dimension in the Y-axis direction (shortitudinal dimension) in Figure 2.

Prepreg 40 is a soft intermediate material (semi-finished product) made by impregnating a bundle of reinforcing fibers with uncured thermosetting resin such as epoxy resin and forming it into a sheet. Reinforcing fibers include carbon fiber and glass fiber.

By subjecting the prepreg 40 to heat treatment, the thermosetting resin is hardened, and the fiber-reinforced resin 125 (finished product) illustrated in FIG. 1 is obtained. Note that multiple sheets of prepreg 40 may be laminated when manufacturing the joining component 120. For example, 3 to 10 layers of prepreg 40 may be laminated on the adhesive film 30.

The dimensions of the prepreg 40 are formed to be smaller than the joining surface 22 of the vehicle component 20. For example, the prepreg 40 is formed so that the length and width of the prepreg 40 are 80% or more and 95% or less of the length of the joining surface 22.

The release film 50 is a film that prevents adhesion between the prepreg 40 and the layers above it, and is made of, for example, a resin film with a silicone coating on the surface or a fluororesin film.

The dimensions of the release film 50 are determined so that it covers, for example, all of the prepregs 40 in the chamber 11. For example, as illustrated in FIG. 11, the dimensions of the release film 50 are determined so that when all of the prepregs 40 are covered with the release film 50, it slightly protrudes outward from the prepregs 40 and the adhesive film 30 and terminates inside the clearance 17 of the chamber 11.

The breather cloth 60 is a member that serves as an air flow path when drawing a vacuum, and is made of, for example, a nonwoven fabric having a predetermined thickness. The dimensions of the breather cloth 60 are set to be slightly larger than the release film 50, and the periphery of the breather cloth 60 is connected to the clearance 17 of the chamber 11 (see Figure 11).

The plate 70, which is a rigid plate, is placed on the prepreg 40 with the release film 50 and breather cloth 60 sandwiched between them. The plate 70 functions as a sacrificial layer or protective layer to suppress the transfer of wrinkles in the bag film 80 to the prepreg 40 during heat treatment.

For example, the plate 70 is made of a metal plate such as an aluminum plate having a thickness of 1 mm to 5 mm. For example, the dimensions of the plate 70 are determined so that it is slightly larger than the prepreg 40. For example, the plate 70 is determined to have a shape such that its length and width are longer than the prepreg 40 by a range of 5 mm to 15 mm. Alternatively, as illustrated in FIG. 9, the plate 70 may be configured with dimensions that cover all of the prepregs 40 contained within the chamber 11.

The plate 70 may also be made of a rigid plate material having the same coefficient of thermal expansion as the fiber reinforced resin 125 (see FIG. 1) after the prepreg 40 is heat treated and hardened. As described below, the prepreg 40 and the plate 70 are pressed against the bag film 80 (or, more fundamentally, to atmospheric pressure) by vacuum drawing, and their positions are fixed. Then, during the heat treatment, when the fiber reinforced resin 125 formed by the hardened prepreg 40 and the plate 70 thermally expand within the bag film 80, the respective components are deformed.

If the thermal expansion coefficients of both are equal during this deformation, the deformation patterns will be similar. For example, the amount of distortion of both will be equal. This will suppress bias in the distribution of surface pressure between the plate 70 and the fiber reinforced resin 125 (e.g., the occurrence of one-sided contact). By suppressing bias in the distribution of surface pressure, it is possible to suppress bias in the thickness of the fiber reinforced resin 125 during cooling to room temperature after heat treatment.

Note that "equal thermal expansion coefficients" does not necessarily mean that the thermal expansion coefficients of the two are strictly the same. In addition to such cases, even if there is a difference in the thermal expansion coefficients of the two, the thermal expansion coefficients are considered to be equal as long as the difference falls within the tolerance range according to the required quality.

For example, the plate 70 is made of the prepreg 40 after it has been heat-treated and hardened, that is, the finished fiber-reinforced resin 125. In this respect, the plate 70 can also function as an upper mold for the prepreg 40. For example, when the prepreg 40 is heated to obtain an uneven fiber-reinforced resin 125, the plate 70 that conforms to the shape is placed on the breather cloth 60 as an upper mold.

When such a plate 70 is manufactured from prepreg 40, for example, prepreg 40 of a size suitable for plate 70 is cut out from a roll on which prepreg 40 is wound. The cut prepreg 40 is then heat-treated individually in autoclave 110. This hardens the thermosetting resin that serves as the binder, and plate 70 is obtained.

Referring to FIG. 2, the bag film 80 is a covering member that covers the laminate 150 consisting of the adhesive film 30, the prepreg 40, the release film 50, the breather cloth 60, and the plate 70. The bag film 80 is obtained, for example, by injection molding silicone rubber.

For example, the bag film 80 is thicker than the vacuum bags conventionally used in the manufacture of joining parts, and can be reused multiple times. As described below, the bag film 80 may thermally shrink during the heating process, causing wrinkles in some areas, but by inserting the plate 70 between the prepreg 40 and the bag film 80, the wrinkles in the bag film 80 are prevented from being transferred to the prepreg 40 (and the fiber-reinforced resin).

The bag film 80 has a three-dimensional shape including a main body portion 82, a side wall portion 84, a step portion 86, and a seal portion 88. The main body portion 82 is placed on the laminate. The main body portion 82 is formed to have the same dimensions as the length of the plate 70, for example. For example, the main body portion 82 is thinner than the seal portion 88, and has higher elasticity than the seal portion 88. Furthermore, by making the main body portion 82 relatively thin, the main body portion 82 is made light-transmitting, allowing the worker to visually check the laminate 150 inside the bag film 80 from the outside.

For example, the laminate 150 and the bag film 80 covering it shown in FIG. 3 are evacuated by the vacuum pump 100 before being placed in the autoclave 110. At this time, an operator can check the position of the plate 70 from the main body 82 of the bag film 80, and if necessary, interrupt the vacuuming and correct the position of the plate 70.

Alternatively, the bag film 80 may be integrated with the plate 70. For example, the plate 70, which is a rigid plate, is joined to the back surface of the main body 82, i.e., the surface facing the laminate 150. This allows the work of placing the plate 70 on the prepreg 40 and the work of covering the laminate 150 with the bag film 80 to be performed in one go, thereby shortening the work time.

Referring to Figures 2 and 3, side walls 84 are erected from the four sides of the rectangular main body 82. The side walls 84 extend, for example, perpendicular to the surface of the main body 82 (in the Z-axis direction). A step 86 is provided at the lower end of the side walls 84. The step 86 is formed, for example, to cover (absorb) the step structure formed by the breather cloth 60 and the release film 50.

Furthermore, a seal portion 88 is connected to the outer end of the step portion 86. The seal portion 88 is a frame-shaped structure provided on the outer edge (four sides) of the rectangular bag film 80, and is formed with dimensions such that it does not cover the clearance 17 of the chamber 11, as illustrated in FIG. 11, for example. For example, the inner edge of the seal portion 88 is formed with dimensions that match the outer edge of the clearance 17 of the chamber 11 or exceed this outward.

The sealing portion 88 also has a sufficient sealing margin with the sealing surface 19 of the mold 10 when a vacuum is drawn. For example, the sealing portion 88 is formed so that the lower surface of the sealing portion 88 (in other words, the surface that contacts the sealing surface 19) has a dimension of 10 mm or more around the entire circumference of the bag film 80.

Referring to FIG. 12, the autoclave 110, which is a molding furnace, performs heat treatment under high temperature and high pressure conditions. Although not shown in FIG. 12, the autoclave 110 may be provided with a compressor that introduces compressed air into the autoclave 110.

The structure and function of the autoclave 110 are known, so a simplified description is provided here. The autoclave 110 has a stage 112 on which the mold 10 is placed. The autoclave 110 also has a heater 116 for heating the air inside the furnace and a fan 114 for circulating the air. Furthermore, one end of a vacuum pipe 102 is connected to the degassing port 16 of the mold 10, and the other end is connected to a vacuum pump 100 outside the furnace.

<Manufacturing process for joint parts>
4 to 12 show an example of a manufacturing process of the joining component 120 according to this embodiment. Note that, below, this manufacturing process is described as a so-called manual operation by an operator or the like, but a part or the entire process may be performed by a robot or the like. Note that, below, a fiber reinforced resin 125, which is a finished product of the prepreg 40, is used as the plate 70.

Referring to FIG. 4, a vehicle part 20, which is a substrate, is placed in the chamber 11 of the mold 10. Furthermore, an adhesive film 30 is laminated on the joining surface 22 exposed from the chamber 11. For example, the center position of the joining surface 22 and the center position of the adhesive film 30 are aligned, and then the adhesive film 30 is laminated on the joining surface 22.

Referring to FIG. 5, the prepreg 40 is laminated on the adhesive film 30. In the same manner as above, the prepreg 40 is laminated on the adhesive film 30 with the centers of the adhesive film 30 and the prepreg 40 aligned.

Referring to FIG. 6, a release film 50 is hung so as to cover all of the prepregs 40 in the chamber 11. At this time, as illustrated in FIG. 11, the outer edge of the release film 50 is positioned so as to be located closer to the center than the clearance 17 of the chamber 11. For example, the outer edge of the release film 50 is attached to the joining surface 22 with a heat-resistant sealant tape or the like.

Referring to FIG. 7, the release film 50 is covered with the breather cloth 60. At this time, referring to FIG. 11, the outer edge of the breather cloth 60 is positioned so as to be connected to the upper end of the clearance 17 of the chamber 11.

Referring to FIG. 8, a plate 70 (here, fiber reinforced resin 125, which is the finished product of prepreg 40) is placed on the breather cloth 60. The center position of the plate 70 is aligned with the center position of the underlying prepreg 40. When this alignment is performed, even if it is difficult to visually confirm the plate 70, for example, if the breather cloth 60 is made of an opaque nonwoven fabric, a convex shape (bulge) is formed in the breather cloth 60 at a position corresponding to the prepreg 40. Based on this convex shape, a worker or the like can confirm the position of the prepreg 40, and the plate 70, which is a rigid board, is placed on the prepreg 40.

Referring further to FIG. 10, the laminate 150 consisting of the adhesive film 30, the prepreg 40, the release film 50, the breather cloth 60, and the plate 70 is covered with the bag film 80, which is a covering member. As illustrated in FIG. 11, the bag film 80 is positioned so that the inner edge of the seal portion 88 coincides with or is located outside the outer edge of the clearance 17 of the chamber 11.

In addition, in order to maintain the sealing ability between the sealing portion 88 of the bag film 80 and the sealing surface 19 of the mold 10, the sealing portion 88 may be attached in a frame shape onto the sealing surface 19 using a heat-resistant sealant tape or the like.

Then, the vacuum pump 100 is driven by an operator or the like, and the inside covered with the bag film 80 is evacuated via the chamber 11 and the vacuum pipe 102. During this vacuuming, the breather cloth 60 becomes an air flow path, so that the prepreg 40 covered with the breather cloth 60 is evenly pressurized over its surface.

The vacuumed laminate 150 is placed in an autoclave 110 (see FIG. 12) which is a molding furnace together with the vehicle part 20 as the base material, the vacuumed bag film 80, and the molding die 10, and is subjected to a heat treatment. The adhesive film 30 melts by the heat treatment, and the prepreg 40 and the vehicle part 20 are bonded (adhered). Furthermore, the thermosetting resin of the prepreg 40 hardens, thereby obtaining a fiber-reinforced resin 125 (see FIG. 1) with the desired strength.

At this time, the bag film 80, particularly the main body 82 (see FIG. 2), undergoes slight thermal shrinkage. For example, the boundary between the main body 82 and the side wall 84, where the thickness changes, shrinks. However, the bag film 80 is thicker than the vacuum bags that have traditionally been used to manufacture joining parts, and the extent of thermal shrinkage is reduced compared to vacuum bags. Therefore, the number and length of wrinkles that occur in the bag film 80 are fewer than in conventional vacuum bags.

In addition, in the manufacturing method for the joining part according to this embodiment, even if wrinkles occur in the bag film 80, the plate 70 is sandwiched between the prepreg 40 and the main body 82, so the transfer of the wrinkles in the main body 82 to the prepreg 40 is suppressed. Therefore, even after wrinkles occur in the bag film 80, the bag film 80 can be repeatedly used to manufacture the joining part 120.

The heat treatment in the autoclave 110 causes the fiber reinforced resin 125 in which the prepreg 40 has hardened and the plate 70 to deform due to thermal expansion. At this time, since the thermal expansion coefficients of the fiber reinforced resin 125 and the plate 70 are equal, the thermal deformation patterns of the two are equivalent. This suppresses bias in the surface pressure distribution between the fiber reinforced resin 125 and the plate 70 (for example, suppresses one-sided contact). By suppressing bias in the in-plane distribution, it becomes possible to suppress bias in the thickness distribution of the fiber reinforced resin 125.

In this embodiment, an autoclave 110 that applies pressure and heat is used as the forming furnace, but a forming furnace that has a heating function but does not have a pressure function may be used, in other words, the joining part 120 may be formed only by heating without applying pressure.

10 mold, 11 chamber, 15 degassing passage, 16 degassing port, 20 vehicle part (substrate), 22 joint surface of vehicle part, 30 adhesive film (adhesive), 40 prepreg, 50 release film, 60 breather cloth, 70 plate (rigid plate), 80 bag film (covering member), 82 main body of bag film, 84 side wall of bag film, 86 step portion of bag film, 88 seal portion of bag film, 100 vacuum pump, 110 autoclave, 120 joint part, 125 fiber reinforced resin, 150 laminate.

Claims (4)

Placing a substrate in a mold having an open-top chamber;
disposing an adhesive on a surface of the substrate ;
A step of laminating a prepreg in which reinforcing fibers are impregnated with an uncured thermosetting resin on the adhesive;
A step of disposing a rigid plate on the prepreg, and further covering a laminate including the adhesive, the prepreg, and the rigid plate with a covering member;
A step of evacuating the inside covered with the covering member;
a step of heat-treating the substrate, the covering member that has been evacuated, and the laminate covered with the covering member;
Including,
a degassing passage is provided on an inner bottom surface of the chamber of the mold, and a degassing port is provided in the degassing passage to evacuate the inside of the chamber during the evacuation step;
Furthermore, support protrusions are formed on the inner side surface and the inner bottom surface of the chamber of the mold, and a clearance is formed between the substrate and the inner side surface and the inner bottom surface of the chamber by the support protrusions,
In the step of covering the laminate with the covering member, an outer edge of the clearance is surrounded by an inner edge of the covering member.
A method for producing a bonded component comprising fiber-reinforced resin. A method for producing a joined part containing a fiber-reinforced resin according to claim 1,
The rigid plate has the same thermal expansion coefficient as the fiber reinforced resin from which the prepreg is cured.
A method for producing a bonded component comprising fiber-reinforced resin. A method for producing a joined component including a fiber-reinforced resin according to claim 2,
The rigid plate is a fiber reinforced resin in which the prepreg is hardened.
A method for producing a bonded component comprising fiber-reinforced resin. A method for producing a joined part containing a fiber-reinforced resin according to any one of claims 1 to 3 ,
The covering member and the rigid plate are integrated together.
A method for producing a bonded component comprising fiber-reinforced resin.

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