JP4856327B2 - Method for manufacturing composite panel - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for manufacturing a composite material panel, and more particularly, to a method for manufacturing a composite material panel made of a composite material made of fiber reinforced resin and suitably used for an outer panel of an aircraft wing.
[0002]
[Prior art]
Currently, composite materials made of fiber reinforced resin are used in various industrial fields. In the aerospace field, in particular, structural panels such as aircraft and space navigation aircraft require weight reduction and high strength, so in recent years, composite panels used for the outer panels of aircraft main wings (or tail wings), etc. (Hereinafter referred to as “reinforcement panel”) is often manufactured from this fiber-reinforced resin composite material.
[0003]
The above-described reinforcing panel includes an outer plate and reinforcing members such as stringers and stiffeners integrally attached thereto. As a conventional method for attaching the reinforcing member to the outer plate, (1) a method in which the outer plate and the reinforcing member are separately formed, and then the reinforcing member arranged at an appropriate position on the surface of the outer plate is fixed by riveting or the like. (2) A technique in which a reinforcing member molded by a prepreg lamination method or an RTM (Resin Transfer Molding) method and primarily cured is adhered to a prepreg for forming an outer plate simultaneously with curing.
[0004]
In the method (1), the outer plate and the reinforcing member are generally formed separately by autoclave molding. That is, a prepreg impregnated with a bundle of predetermined reinforcing fibers with an uncured thermosetting resin is placed on a jig having a predetermined shape, and a predetermined pressure plate is placed on the prepreg if necessary. After that, a bag film is placed on the prepreg layer (and the pressure plate), air inside the bag film is exhausted and a vacuum pressure is applied, and then the pressure is applied and heated in an autoclave to be cured. The outer plate and the reinforcing member were molded. Further, in order to fix the reinforcing member to the molded outer plate, as described above, complicated work such as riveting is required.
[0005]
In the above method (2), the reinforcing member molded by the prepreg lamination method or the RTM method and primarily cured is placed on the prepreg for forming the outer plate through an adhesive, and an autoclave is used. It was necessary to cure the prepreg at the same time as applying the pressure and heating to bond the prepreg for forming the outer plate and the reinforcing member.
[0006]
[Problems to be solved by the invention]
However, the conventional method of manufacturing a reinforcing panel using a prepreg and an autoclave has the following problems.
[0007]
That is, when the outer plate is formed by the methods (1) and (2) described above, it is necessary to laminate a plurality of plate-like prepregs. When the layers were laminated, it was difficult to peel off again and finely adjust the position. In addition, in the molded product (outer plate or reinforcing member) finished by curing the prepreg using an autoclave, air bubbles generated during the curing reaction of the thermosetting resin remain to form voids, This void may reduce the strength of the molded product.
[0008]
The prepreg is obtained by impregnating a predetermined bundle of reinforcing fibers with an uncured thermosetting resin. In order to prevent the curing reaction of the uncured thermosetting resin, the prepreg is cooled at a low temperature. It is necessary to store in the environment. For this reason, it was necessary to install a separate refrigeration facility for prepreg storage. Also, even when the prepreg is stored in a low temperature environment, the curing reaction proceeds gradually during storage, so the storage period is limited, and when the storage period elapses, the thermosetting resin constituting the prepreg is strengthened The fibers had to be discarded together, resulting in increased manufacturing costs.
[0009]
Further, when the outer plate is formed by the above-described methods (1) and (2), it is necessary to use an autoclave for curing the prepreg, and in particular, the outer plate and the reinforcement by the above-described method (1). When molding the members separately by autoclave molding, it is necessary to operate the autoclave a plurality of times. Since the operation of the autoclave requires very large electric power, the manufacturing cost for manufacturing the reinforcing panel has been extremely high.
[0010]
Furthermore, when manufacturing extremely large reinforcing panels, such as for large aircraft main wing reinforcing panels, it is necessary to build a very large autoclave, but it is necessary to secure a place to build such a large autoclave. Implementation was delayed due to difficulties in cost and cost issues.
[0011]
The present invention solves the problems at the time of manufacturing a reinforcing panel using a prepreg and an autoclave as described above. That is, the subject of this invention is providing the manufacturing method of the composite material panel which can reduce manufacturing effort remarkably, and can reduce manufacturing cost remarkably.
[0012]
[Means for Solving the Problems]
In order to solve the above problems, the invention described in claim 1 is, for example, as shown in FIGS.
In a method for producing a composite panel having a plate-like body made of a fiber-reinforced resin composite and a reinforcing member made of a fiber-reinforced resin composite that reinforces the plate-like body,
A reinforcing member molding step in which the reinforcing member is molded in advance by primary curing or main curing;
A plate-like molding material laminating step of laminating a flexible dry thin plate-like body constituted by reinforcing fibers and a thermosetting resin film on a lower mold jig;
A reinforcing member arranging step of arranging the reinforcing member on the thin plate member via a thermosetting adhesive;
A sealing step of covering the reinforcing member, the thermosetting resin film, and the thin plate-like body by covering the reinforcing member with a vacuum bag film;
An exhaust process for exhausting air from the portion sealed with the vacuum bag film;
Heat the part that was sealed with the vacuum bag film and discharged air And impregnating the thin plate with the thermosetting resin of the thermosetting resin film. And a heating step.
[0013]
According to the invention of claim 1, the thermosetting resin film and Flexible and dry sheet-like body composed of reinforcing fibers Since a composite panel is manufactured from a pre-molded reinforcing member, it is not necessary to use a prepreg to manufacture the composite panel, and the conventional manufacturing problems caused by using the prepreg are solved at once. be able to.
[0014]
That is, made of reinforced fiber Flexible dry sheet Are placed on the thermosetting resin film, Thin plate And the thermosetting resin film has weak adhesive strength, and this Thin plate When a plurality of layers are stacked, the layers do not adhere to each other, so that the stacking operation becomes extremely easy. Also, once laminated, Thin plate Can be freely changed. As a result, the composite panel can be easily manufactured. In addition, no void is formed in the interior as in the case where the prepreg is cured, and the quality of the manufactured composite panel is not deteriorated.
[0015]
Furthermore, only the thermosetting resin film that needs to be stored frozen is made of reinforced fiber. Thin plate Can be stored at room temperature, made of thermosetting resin film and reinforced fiber Thin plate And can be stored separately. Therefore, even if the thermosetting resin film deteriorates due to long-term storage, only the thermosetting resin film needs to be discarded, and both the thermosetting resin and the reinforcing fiber are discarded as in the case of prepreg disposal. There is no need. As a result, the cost for manufacturing the composite panel can be reduced.
[0016]
Moreover, according to invention of Claim 1, a thermosetting resin film and Flexible and dry sheet-like body composed of reinforcing fibers The plate-shaped body is molded from the above and a pre-shaped reinforcing member is used as a component of the composite panel. Therefore, the thermosetting resin of the thermosetting resin film is used. Thin plate It is sufficient if the pressure is sufficient to impregnate, and molding can be sufficiently performed only by pressurization by evacuation in the exhaust process. Therefore, it is not necessary to use an autoclave when manufacturing the composite panel.
[0017]
As a result, it is possible to solve the manufacturing problems that have conventionally occurred by using the autoclave. That is, the manufacturing cost of the composite panel does not increase as in the case of using an autoclave, and even when the composite panel to be manufactured is large, it is necessary to build a large autoclave adapted to this. Absent.
[0018]
According to the invention of claim 1, Since it includes a heating step of impregnating the thin plate-like body with the thermosetting resin of the thermosetting resin film by heating a portion sealed with a vacuum bag film and discharging air. It is possible to simultaneously form a plate-like body composed of a flexible and thin sheet-like body composed of a thermosetting resin film and reinforcing fibers and fix the reinforcing member to the surface of the plate-like body. For this reason, when manufacturing the composite panel, it is possible to omit complicated operations such as riveting that were conventionally required when fixing the reinforcing member to the plate-like body, and the labor for manufacturing the composite panel is greatly reduced. Can be reduced.
[0019]
According to a second aspect of the present invention, in the method for manufacturing a composite panel according to the first aspect, the reinforcing member is an intermediate product obtained by first curing a thermosetting resin, and in the heating step, the reinforcing member is It is characterized by being fully cured.
[0020]
According to the second aspect of the invention, in addition to the same effects as the first aspect of the invention, the reinforcing member is an intermediate product obtained by first curing a thermosetting resin. Since the main curing is performed in the heating step simultaneously with the molding of the plate-like body and the fixing of the reinforcing member to the surface of the plate-like body, it is not necessary to use a reinforcing member that has been fully cured in advance. As a result, it is possible to save the labor (labor) of main-curing the reinforcing member, and as a whole, it is possible to shorten the manufacturing time, further reduce the manufacturing labor, and reduce the manufacturing cost.
[0021]
According to a third aspect of the present invention, in the method for manufacturing a composite panel according to the first or second aspect, for example, as shown in FIG. After laminating the curable resin film, on the thermosetting resin film, Thin plate The thermosetting resin film and the laminated Thin plate The side jig is arranged close to the side surface around the side jig and the side jig Thin plate And an air passage is formed on the reinforcing member.
[0022]
According to the invention described in claim 3, in addition to the same effects as the invention described in claim 1 or 2, in addition to the gas generated by the impregnation / curing reaction of the thermosetting resin, the adhesive interface (that is, Thin plate And the adhesive, and between the reinforcing member and the adhesive) can be effectively discharged to the outside. As a result, a higher quality composite panel can be manufactured.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0024]
[First embodiment]
The composite panel 10 according to the present embodiment is used for an aircraft wing skin and the like. As shown in FIG. 1, a skin 20 and a reinforcing member 30 fixed integrally therewith are provided. Is provided. The outer plate 20 of the composite panel 10 is formed from a thermosetting resin film 21 and a dry preform 22 as described later. Further, as is clear from FIG. 1, the reinforcing member 30 is a long member (stringer) having a T-shaped cross section when cut at right angles to the length direction.
[0025]
The thermosetting resin film 21 forms the outer plate 20 of the composite panel 10 together with the dry preform 22. As a kind of thermosetting resin used as the material of the thermosetting resin film 21, an epoxy resin, a phenol resin, crosslinked polyethylene, bismaleimide, a polyimide, etc. can be mentioned, Among these, an epoxy resin is suitable. The thickness of the thermosetting resin film 21 and the dry preform 22 can be appropriately determined according to the size of the outer plate 20 of the composite panel 10 to be manufactured.
[0026]
The dry preform 22 forms the outer plate 20 of the composite panel 10 together with the thermosetting resin film 21 described above. In the present invention, the “dry preform” means a flexible, dry thin plate-like body composed of various reinforcing fibers, and includes a laminate in which a plurality of thin plate-like bodies are laminated. Examples of the types of reinforcing fibers constituting the dry preform 22 include glass fibers, carbon fibers, aramid fibers, and alumina fibers.
[0027]
As a configuration mode of the dry preform 22, for example, a woven shape, a knitted shape, a mat shape, or a felt shape can be formed by weaving, knitting, or twisting the reinforcing fibers. Further, the thickness of the dry preform 22 can be appropriately determined according to the size of the outer plate 20 of the composite panel 10 to be manufactured and the thickness of the thermosetting resin film 21.
[0028]
The reinforcing member 30 is integrally fixed on the outer plate 20 formed by the thermosetting resin film 21 and the dry preform 22 described above, and reinforces the outer plate 20, and is provided with a shear load, a torsional load, or a bending load. The composite panel 10 is made to exhibit high strength against the load. The reinforcing member 30 is formed by a prepreg lamination method or an RTM method using a thermosetting resin as a material, and is first-cured or main-cured. In the present embodiment, as described above, The cross-sectional shape when cut at right angles is T-shaped.
[0029]
Next, a method for manufacturing the composite panel 10 according to the first embodiment will be described with reference to FIGS.
[0030]
First, the lower mold jig 40 is installed at a predetermined location. The surface shape of the lower mold jig 40 is the same as the surface shape of the outer plate 20 of the composite panel 10 to be molded, and the thermosetting resin film 21 is disposed on the surface. This lower mold jig 40 needs to have rigidity that does not deform even by a vacuum pressure in an exhaust process described later, and heat resistance that can withstand a heating process described later, but if it has such characteristics, There are no restrictions on the structure and materials.
[0031]
Next, the thermosetting resin film 21 is disposed on the surface of the lower mold jig 40. At this time, if a release agent is interposed between the thermosetting resin film 21 and the surface of the lower mold jig 40, the composite panel 10 can be easily separated from the lower mold jig 40 after molding. This is preferable because it is possible.
[0032]
Subsequently, the dry preform 22 is arrange | positioned on the thermosetting resin film 21 (refer the plate-shaped body molding material arrangement | positioning process, FIG. 2). In the case where the dry preform 22 is formed by laminating a plurality of thin fiber bodies made of reinforcing fibers, if the laminates of the reinforcing fibers of the thin plate bodies are laminated with different orientations, the load can be applied to loads from all directions. The outer plate 20 exhibiting high strength can be molded. Further, since the dry preform 22 is not impregnated with the thermosetting resin, it does not adhere to each other, and the adhesiveness of the thermosetting resin film 21 is weak, so that the laminating operation becomes much easier.
[0033]
Next, the above-described reinforcing member 30 is arranged on the dry preform 22 via the adhesive 23 (reinforcing member arranging step, see FIG. 2). The adhesive 23 is a high-strength thermosetting resin adhesive such as an epoxy resin or a phenol resin that can be cured in a heating process described later. In addition, the adhesive 23 can be in the form of a film, liquid, powder, etc., but it is preferable to use a film-like aspect that is easy to handle and has a stable quality. Adhesive 23 is employed.
[0034]
Next, as shown in FIG. 2, a pressure plate 50 is disposed on the dry preform 22 so that a uniform pressure can be applied to the dry preform 22 during an exhaust process described later. The pressure plate 50 also functions to prevent displacement of the reinforcing member 30 during the coating process, and can be prepared from metal or rubber.
[0035]
Further, a dam 60 is disposed around the laminate of the thermosetting resin film 21, the dry preform 22, and the pressure plate 50, and the thermosetting resin of the thermosetting resin film 21 is dried by the heating process described later. When impregnating, the thermosetting resin is prevented from flowing out. This dam 60 can also be prepared from metal or rubber in the same manner as the pressure plate 50.
[0036]
Next, the thermosetting resin film 21, the dry preform 22, the pressure plate 50, and the reinforcing member 30 disposed on the lower mold jig 40 are covered with a vacuum bag film 70 and sealed (sealing process, see FIG. 2). . That is, the thermosetting resin film 21, the dry preform 22, the pressure plate 50, and the reinforcing member 30 are sandwiched between the vacuum bag film 70 and the lower mold jig 40.
[0037]
The vacuum bag film 70 has high air tightness and excellent flexibility so that it can be pressed against the pressure plate 50 and the reinforcing member 30 during the exhaust process described later. Those prepared are preferred.
[0038]
Next, air is discharged from the inside of the vacuum bag film 70, and vacuum pressure is applied to the thermosetting resin film 21, the dry preform 22, and the reinforcing member 70 sandwiched between the vacuum bag film 70 and the lower mold jig 40. Thus, the thermosetting resin film 21 and the reinforcing member 30 are brought into close contact with the dry preform 22 (exhaust process).
[0039]
As an exhaust method in the exhaust process, for example, an exhaust hole is provided in the vacuum bag film 70, the exhaust hole and the vacuum device are connected by an exhaust pipe, and the air inside the vacuum bag film 70 is discharged by the vacuum device. Conventional methods such as discharging can be adopted.
[0040]
Subsequently, the thermosetting resin of the thermosetting resin film 21 is impregnated in the dry preform 22 by heating the thermosetting resin film 21 and the dry preform 22 in a state where a vacuum pressure is applied by the exhaust process described above. The impregnated thermosetting resin and the adhesive 23 are cured (heating step). By this heating step, the outer plate 20 can be molded and the reinforcing member 30 can be bonded to the surface of the outer plate 20 at the same time.
[0041]
Heating can be performed using a heating device or an oven built in the lower mold jig 40. The heating temperature and heating time at this time can be appropriately determined according to the type of thermosetting resin, the thickness of the thermosetting resin film 21, the number of laminated dry preforms 22, and the like.
[0042]
The reinforcing member 30 disposed on the dry preform 22 is molded by the RTM method using a specific thermosetting resin such as CYCOM 875 RTM (trade name: manufactured by Cytec Fiberite Inc.). In the case of a cured intermediate product, in the heating step described above, the outer plate 20 is molded by impregnating and curing the thermosetting resin of the thermosetting resin film 21 into the dry preform 22, and the thermosetting resin. Simultaneously with the fixing of the reinforcing member 30 to the surface of the outer plate 20 by the curing of the adhesive 23 made of this, the main curing of the reinforcing member 30 can be performed. As a result, the manufacturing time of the composite panel 10 can be shortened, and further reduction in manufacturing effort and manufacturing cost can be achieved. Further, it is not necessary to use an autoclave when the reinforcing member 30 is formed.
[0043]
According to the above procedure, the composite panel 10 can be manufactured by simultaneously forming the outer plate 20 with the thermosetting resin film 21 and the dry preform 22 and fixing the reinforcing member 30 to the surface of the outer plate 20. Further, detailed components arranged in the vicinity of the dry preform 22 and the pressure plate 50 will be described with reference to FIG. As shown in FIG. 3, a silicon sheet 80 having exhaust holes is disposed between the dry preform 22 and the pressure plate 50 via peel layers 81 and 82, and further inside the vacuum bag film 70. A breather 90 is arranged.
[0044]
The silicon sheet 80 functions to prevent the thermosetting resin of the thermosetting resin film 21 melted by the heating process from flowing out. In addition, the peel layers 81 and 82 prevent the pressure plate 50 from coming into close contact with the dry preform 22 and difficult to peel off after the molding operation when the above-described evacuation process and heating process are performed. It fulfills the function of effectively discharging the gas generated by the impregnation / curing reaction and the air present at the adhesive interface to the outside.
[0045]
The first peel layer 81 between the dry preform 22 and the silicon sheet 80 can be composed of, for example, an FEP (fluoroethylene propylene) film having exhaust holes, a nylon fabric, a polyethylene fabric, or the like. The second peel layer 82 between the silicon sheet 80 and the pressure plate 50 can be made of a nylon fabric or a polyester fabric. As described above, when the first peel layer 81 is an FEP film, an exhaust hole is provided because the gas generated by the impregnation / curing reaction of the thermosetting resin and the air existing at the adhesive interface are externally effective. This is because it discharges automatically.
[0046]
The breather 90 also removes gas generated by the impregnation / curing reaction of the thermosetting resin when the above-described exhaust process and heating process are performed, and air exhausted from the adhesive interface to the exhaust hole of the vacuum bag film 70. The gas and air are guided to the vicinity and function to effectively exhaust the gas and air to the outside of the vacuum bag film 70. The breather 90 can be prepared from a glass fiber fabric or a polyester nonwoven fabric.
[0047]
According to the method for manufacturing composite panel 10 according to the present embodiment, outer plate 20 is formed from thermosetting resin film 21 and dry preform 22, and composite material is used using reinforcing member 30 that is formed in advance. Since the panel 10 is manufactured, it is not necessary to use a prepreg at the time of manufacturing, and the conventional manufacturing problems that have been caused by using the prepreg can be solved all at once.
[0048]
That is, the dry preform 22 does not stick to the thermosetting resin film 21 at the time of lamination, and even when a plurality of dry preforms 22 are laminated, the layers do not adhere to each other. . In addition, the arrangement direction of the dry preform 22 can be freely changed even after lamination. As a result, the manufacture of the composite material panel 10 becomes much easier. Furthermore, since the dry preform 22 is not sticky, air is easily discharged from the interlayer. Furthermore, the high-quality composite panel 10 can be obtained without forming voids in the interior as in the case where the prepreg is cured.
[0049]
Further, since the dry preform 22 used in the manufacturing method according to the present embodiment can be stored at room temperature, it is not necessary to store it in a low temperature environment like a prepreg, and it is a freezer for storing a thermosetting resin film. Only equipment is enough. Even if the thermosetting resin film 21 deteriorates due to long-term storage, it is only necessary to discard the thermosetting resin film 21, and the thermosetting resin and the reinforcing fiber are disposed as in the case of conventional prepreg disposal. Need not be disposed of together. As a result, the manufacturing cost of the composite material panel 10 can be reduced.
[0050]
Further, according to the method for manufacturing the composite panel 10 according to the present embodiment, the outer plate 20 is formed by sequentially laminating the thermosetting resin film 21 and the dry preform 22 on the lower jig 40, and Since the composite panel 10 is manufactured by evacuating and heating using the pre-formed reinforcing member 30, it is not necessary to use an autoclave at the time of manufacturing, and this is caused by using the autoclave. Conventional manufacturing problems can be solved all at once.
[0051]
In other words, by incorporating a heating device in the lower mold jig 40, heating can be performed without using an autoclave, and the manufacturing cost of the composite panel does not increase as in the case of using an autoclave. Even when the composite panel to be manufactured is large, it is not necessary to construct a large autoclave corresponding to this.
[0052]
Moreover, according to the manufacturing method of the composite panel 10 according to the present embodiment, the outer plate 20 composed of the thermosetting resin film 21 and the dry preform 22 is molded, and the reinforcing member 30 is attached to the outer plate 20. Fixing can be performed simultaneously. For this reason, when manufacturing the composite panel 10, troublesome work such as riveting conventionally required when fixing the reinforcing member 30 to the outer plate 20 can be omitted, and the manufacturing labor can be greatly reduced. be able to.
[0053]
Further, according to the method for manufacturing the composite panel 10 according to the present embodiment, the reinforcing member 30 is disposed on the dry preform 22 via the adhesive 23, and the pressure plate is disposed on the side of the reinforcing member 30. Since 50 is arranged, the reinforcing member 30 can be temporarily fixed on the dry preform 22 easily and accurately, and displacement of the position can be prevented.
[0054]
[Second Embodiment]
Next, a second embodiment will be described. In the present embodiment, a method for manufacturing a composite panel through substantially the same steps as the manufacturing method according to the first embodiment will be described. In the present embodiment, the porous filter 50 ′ is disposed between the breather 90 and the second peel layer 82 without using the pressure plate 50 used in the first embodiment (see FIG. 4). .
[0055]
By employing the porous filter 50 ′, the vacuum bag film 70 can be directly brought into close contact with the silicon sheet 80 to apply a vacuum pressure. Further, the porous filter 50 ′ can prevent the molten thermosetting resin of the thermosetting resin film 21 from flowing out to the breather 90 side.
[0056]
Although the reinforcing member constituting the composite panel according to the above-described embodiment shows a T-shaped cross-sectional shape when cut at right angles to the length direction, it is not limited to this. Absent. For example, the reinforcing member 30 ′ (see FIG. 5) whose cross-sectional shape is I-shaped, or a hat-shaped cross-sectional shape (that is, a rectangular protrusion projecting upward, and a left-right extension connected to both end portions). The composite material panel can be configured using a reinforcing member 30 ″ (see FIG. 6) or the like that exhibits a shape including a base portion.
[0057]
【Effect of the invention】
According to the first aspect of the present invention, the dry preform does not stick to the thermosetting resin film, and even when a plurality of the dry preforms are stacked, they do not stick to each other. It becomes extremely easy, and the arrangement direction of the dry preform can be freely changed even after lamination. As a result, the composite panel can be easily manufactured. Further, no void is formed in the interior as in the case where the prepreg is cured, and a high-quality composite panel can be manufactured.
[0058]
Further, according to the invention described in claim 1, since the dry preform can be stored at room temperature, it is not necessary to store it in a low temperature environment like a prepreg, and a refrigeration facility for storing a thermosetting resin film is installed. Just do it. Even if the thermosetting resin film deteriorates due to long-term storage, only the thermosetting resin film needs to be discarded, and both the thermosetting resin and the reinforcing fiber are discarded as in the case of prepreg disposal. There is no need. As a result, the manufacturing cost of the composite panel can be reduced.
[0059]
Furthermore, according to the first aspect of the present invention, the manufacturing cost of the composite panel does not increase as in the case of using an autoclave, and it is also applicable to the case where the composite panel to be manufactured is large. There is no need to install a large autoclave.
[0060]
Furthermore, according to the first aspect of the present invention, it is possible to simultaneously form a plate-like body composed of a thermosetting resin film and a dry preform and fix the reinforcing member to the plate-like body. For this reason, when manufacturing the composite panel, it is possible to omit complicated operations such as riveting that were conventionally required when fixing the reinforcing member to the plate-like body, and the labor for manufacturing the composite panel is greatly reduced. Can be reduced.
[0061]
According to the second aspect of the invention, not only the effect of the first aspect of the invention can be achieved, but also the labor (main effort) for main-curing the reinforcing member can be saved, and as a whole, the manufacture of the composite panel It can result in reduced time, further manufacturing effort and manufacturing costs.
[0062]
According to the third aspect of the present invention, the gas generated by the impregnation / curing reaction of the thermosetting resin and the air present at the adhesive interface, as well as the effects of the first or second aspect of the invention. Can be discharged to the outside more effectively. As a result, a higher quality composite panel can be manufactured.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an example of a composite material panel manufactured by a method for manufacturing a composite material panel according to an embodiment of the present invention.
FIG. 2 is an explanatory diagram for explaining a manufacturing method of the composite panel shown in FIG. 1;
FIG. 3 is an enlarged view of a portion III in FIG. 2;
FIG. 4 is an explanatory diagram for explaining a method for manufacturing a composite panel according to a second embodiment of the present invention.
FIG. 5 is an explanatory view showing a case where the cross-sectional shape of the reinforcing member is I-shaped in the method for manufacturing a composite panel according to the present invention.
FIG. 6 is an explanatory diagram showing a case where the cross-sectional shape of the reinforcing member is a hat shape in the method for manufacturing a composite panel according to the present invention.
FIG. 7 is a perspective view showing a method for manufacturing a composite panel according to an embodiment of the present invention.
[Explanation of symbols]
10 Composite panel
20 outer plate
21 Thermosetting resin film
22 Dry preform
23 Adhesive
30 Reinforcing member (T-shaped stringer)
30 'Reinforcement member (I-shaped stringer)
30 "reinforcement member (cross-section hat stringer)
40 Lower mold jig
50 pressure plate
50 'porous filter
60 dam
70 Vacuum bag film
80 Silicon sheet
81 First peel layer
82 2nd peel layer
90 breather

Claims (3)

In a method for producing a composite panel having a plate-like body made of a fiber-reinforced resin composite and a reinforcing member made of a fiber-reinforced resin composite that reinforces the plate-like body,
A reinforcing member molding step in which the reinforcing member is molded in advance by primary curing or main curing;
A plate-like molding material laminating step of laminating a flexible dry thin plate-like body constituted by reinforcing fibers and a thermosetting resin film on a lower mold jig;
A reinforcing member arranging step of arranging the reinforcing member on the thin plate member via a thermosetting adhesive;
A sealing step of covering the reinforcing member, the thermosetting resin film, and the thin plate-like body by covering the reinforcing member with a vacuum bag film;
An exhaust process for exhausting air from the portion sealed with the vacuum bag film;
A heating step of heating a portion sealed with the vacuum bag film and discharging air to impregnate the thin plate-like body with the thermosetting resin of the thermosetting resin film . Production method. The reinforcing member is
It is an intermediate product obtained by first curing a thermosetting resin,
In the heating step,
The method of manufacturing a composite panel according to claim 1, wherein the reinforcing member is fully cured. In the plate body molding material laminating step,
After laminating the thermosetting resin film on the lower mold jig, laminating the thin plate-like body on the thermosetting resin film,
A side jig is placed close to the side surface around the laminated thermosetting resin film and the thin plate-like body,
The method for manufacturing a composite panel according to claim 1, wherein an air passage is formed on the side jig, the thin plate-like body, and the reinforcing member.

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