JPH11207911A - Method for molding composite material and molding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the entrainment of air at the early stage of an adhesive film application by stretching the adhesive film from the center part of a region where an adherent or a doubler/over patch is attached to the end part thereof, and joining and pressurizing the doubler/over patch from its enter part to its end part over a region for adhesive coverage. SOLUTION: A doubler/over patch 2 is arranged on a surface plate 1 and a spacer 3 is arranged in such a way that the doubler/over patch 2 is surrounded, and further, an adhesive film 4 is immobilized. Next, a vacuum bag film 5 is arranged to seal the entire material to be vacuumized. Consequently, the air present between the doubler/over patch 2 and the adhesive film 4 is displaced from the center part to the outer part in the radial direction by the tension of the vacuum bag film 5, so that the adhesive film 4 is brought into tight contact with the doubler/over patch 2. The doubler/ over patch 2 now set in tight contact with the adhesive film 4 is placed on the adherent 8 with the adhesive film 4 coming on the lower side, and the spacer 9 is thus surrounded and further, the entire material is wrapped with a vacuum bag film 11. Following these procedures, the whole material is vacuumized and sealed under pressure, so that no bubbles remain unremoved and no defective parts remain uncorrected.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for bonding a doubler / overpatch or the like to a fiber reinforced plastic part (composite part) of an automobile, a ship or general industrial equipment. Alternatively, the present invention relates to a method and an apparatus for molding a composite material in which a good adhesive layer or surface is ensured by eliminating air entrapped between them and an object to be adhered.

[0002] The molding of the composite material includes not only the molding of a normal composite material but also the reinforcement and repair of the composite material.

[0003]

2. Description of the Related Art Composite parts are compared with metal structures.
In order to recover the damaged portion to the initial performance (strength, rigidity, function, etc.) due to impact or the like, patch repair by bonding is adopted.

[0004] Patch repair by bonding includes a method of stacking and bonding a pre-cured composite material and a method of laminating a prepreg or a wet resin impregnated cloth on a part and simultaneously curing them. . 385 1
It is described in the composite structure and repair section of the April 987 issue.

[0005] According to a general method of bonding patches in a working environment in patch application repair by bonding, no matter how carefully a patch is bonded to a repair section of a composite material part, the composite material is Air is trapped between the repair part of the component and the patch, and this air cannot be completely removed in the subsequent deaeration process, and remains as a void in the adhesive layer of the repair part of the composite component. . In the molding method using an autoclave in which a high pressure (6 kg / cm ² ) is applied, the void amount decreases in inverse proportion to the curing pressure. In the atmospheric pressure forming method using vacuum bagging, the amount of entrapped air becomes larger voids due to thermal expansion due to heating, and the decrease in adhesive strength of the adhesive layer becomes a level that cannot be ignored.

[0006] The molding method using an autoclave can provide a high-quality adhesive layer of a composite material part. However, in addition to a case where the composite material part does not enter the autoclave, the composite material part is bonded to other parts that are vulnerable to heat and pressure. This method cannot be applied to the case where heating, pressurization in an autoclave causes breakage, functional deterioration, or deterioration. Similarly, if it is difficult to restrain the mold used to manufacture the composite material part, deformation or delamination may occur, and this is not applicable.

The atmospheric pressure molding method using heat blanket heating and vacuum bagging has few restrictions as compared with the molding method using an autoclave. However, since there is no particular pressurizing mechanism, the difference between the vacuum pressure and the atmospheric pressure due to the vacuum bag film is reduced. Only pressure (up to 1 atm) can be applied. Therefore, when the doubler / overpatch requires strength or heat resistance equal to or higher than that of the adherend, a laminate or metal plate of a composite material which has been previously autoclaved and cured is used as the doubler / overpatch. Sufficient adhesive strength cannot be obtained due to air remaining in the adhesive layer between these and the adherend. The pressure molding by the atmospheric pressure is also better than the pressure (3-6 kg / cm ² ) molding using an autoclave having a pressure device due to the residual heat of the entrained air. Adhesive layer and molding quality cannot be obtained.

The present applicant has developed a method of forming a composite material using a warped coal plate so as to prevent air bubbles from remaining between the stacked materials (Japanese Patent Laid-Open No. 2-1620).
No. 16).

In Japanese Patent Application Laid-Open No. 61-27173, a block for lifting an elastic sheet is provided on both sides of a member to be bonded, and a spacer is provided in a space formed by the base and the block to reduce the vacuuming space so as to cover the member. A method of bonding an adhesive tape to an adhesive member by vacuum pressure is described.

[0010]

Problems to be Solved by the Invention
In the method of forming a composite material disclosed in Japanese Patent Application Laid-Open No. 6-76, air bubbles and the like can be completely exhausted without being caught between the materials by applying a warped coal plate, but this is achieved by pressurizing to 6 atm with an autoclave or the like. Is possible,
The material used is also limited to uncured prepreg.

The technical means disclosed in Japanese Patent Application Laid-Open No. 61-27173 is implemented by hand when applying an adhesive tape to a member to be adhered. Therefore, the adhesive tape is not sufficiently spread and wrinkles remain. Air remains. Then, the remaining air cannot be discharged thereafter.

The present invention has been made in view of the above points, and eliminates the entrapment of air at the initial stage of application of an adhesive film, and forms a high-quality composite material having no residual air bubbles even when cured under vacuum pressure. It is an object of the present invention to provide a method and apparatus for molding a composite material.

[0013]

According to a first aspect of the present invention, there is provided a method for forming a composite material, comprising the steps of: adhering an adhesive film from a central portion to an end portion of a bonding portion of an adherend or a doubler / overpatch; It is characterized in that the patch is closely pressed from the center to the end of the adhered portion of the object to be bonded, and is subjected to a pressure heat curing treatment.

According to a second aspect of the present invention, there is provided a method of forming a composite material according to the first aspect, wherein the attaching of the adherend to the adhesive film or the pressurization of the doubler / overpatch is performed by: It is characterized in that the sealed space is evacuated under atmospheric pressure. The method of forming the composite material.

According to a third aspect of the present invention, the doubler / overpatch and the spacer surrounding the doubler / overpatch are arranged on a flat plate having no air permeability, and the adhesive film is spread on the spacer. The whole is sealed with a vacuum bag film, the sealed space of the vacuum bag film is evacuated, the adhesive film is attached from the center of the doubler / overpatch to the end, the vacuum bag film is removed, and the adhesive film is doubled. Trimming according to the overpatch, arranging the doubler / overpatch at the adhesion site so that the adhesive film faces the adherend, arranging spacers around it, sealing the whole with a vacuum bag film, Vacuum so that the sealed space of the film adheres from the center to the edge of the doubler / overpatch. Knight wherein the heat curing treatment while evacuating.

According to a fourth aspect of the present invention, the doubler / overpatch and the spacer surrounding the doubler / overpatch are arranged on a flat plate having no air permeability, and the adhesive film is spread on the spacer. The whole is sealed with a vacuum bag film, the sealed space of the vacuum bag film is evacuated, the adhesive film is stuck from the center to the end of the doubler / overpatch, and the vacuum bag film is removed and adhered to the adhesive film The doubler / overpatch is stretched on the spacer with the body facing, the whole is sealed with a vacuum bag film, and the sealed space of the vacuum bag film is adhered from the center to the end of the doubler / overpatch. Vacuum, remove the vacuum bag film, and align the adhesive film with the doubler / overpatch. The timing, the doubler / over patch was sealed in a vacuum bag film from the top of the spacer,
It is characterized in that a heat curing treatment is performed while vacuuming the sealed space of the vacuum bag film.

According to a fifth aspect of the present invention, there is provided a method for forming a composite material, comprising: disposing a spacer around a bonding portion of an object to be bonded, spreading an adhesive film on the spacer, sealing these with a vacuum bag film, and Vacuum the sealed space of the above, attach the adhesive film from the center to the end of the bonding area, remove the vacuum bag film, trim the adhesive film, and double
Attach the overpatch, make the doubler / overpatch face the bonding part, seal the bonding part with the vacuum bag film from above the spacer, and evacuate the sealed space of the vacuum bag film to remove the doubler / overpatch from the center. It is characterized in that it is heated and cured while being in close contact with the end and vacuuming the sealed space of the vacuum bag film.

According to a sixth aspect of the present invention, there is provided a method for forming a composite material, comprising: adhering an adhesive to an adhered portion of an adherend or a doubler / overpatch; sealing the adhered portion; evacuating to a predetermined pressure; It is characterized in that the doubler / overpatch is pressed in close contact with the bonding portion of the object to be bonded in a vacuum-evacuated state, and heat-cured while pressurizing in the vacuum-evacuated state.

According to a seventh aspect of the present invention, there is provided a composite material molding apparatus, wherein a transparent pressure-resistant cylinder, an upper lid hermetically fixed to an upper end of the cylinder, and airtightness provided at a lower end of the cylinder are ensured. And an operating body with a patch sticking plate slidably supported by the upper lid, and a vacuum device for evacuating the inside of the cylindrical body.

[0020]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 are views showing a first embodiment of a method for forming a composite material according to the present invention. In FIG. 1, reference numeral 1 denotes a flat plate having no air permeability such as a surface plate 1, for example. Is shown.

In the first embodiment, FIG.
As shown in (1), a doubler / overpatch 2 is arranged on a surface plate 1, and a spacer 3 is arranged so as to surround the doubler / overpatch 2. Then, the adhesive film 4 is fixed on the spacer 3 so as to stretch the film. The height of the spacer 3 from the surface plate 1 is set to be high enough to extend the adhesive film 4 so as not to contact the doubler / overpatch 2.

Next, a vacuum bag film 5 is arranged so as to cover the spacer 3 and the adhesive film 4, and the space between the vacuum bag film 5 and the platen 1 is sealed with a sealant 6. Thereby, a sealed space is formed inside the vacuum bag film 5. The vacuum base 7 attached to the vacuum bag film 5 is connected to a vacuum line 8 as shown in FIG. The vacuum line 8 is connected to a vacuum device (not shown).

When a vacuum device (not shown) is operated, FIG.
As shown in (b), the space surrounded by the vacuum bag film 5 is gradually evacuated, and the air between the doubler / overpatch 2 and the adhesive film 4 is converted into a doubler by utilizing the tension of the vacuum bag film. The adhesive film 4 is removed radially outward from the center of the / overpatch 2, and the adhesive film 4 gradually starts to adhere to the doubler / overpatch 2 from the center to the end.

Further, when the space surrounded by the vacuum bag film 5 is evacuated so as to increase the degree of vacuum, FIG.
As shown in (c), the adhesion range between the adhesive film 4 and the doubler / overpatch 2 is widened, and finally, the adhesive film 4 and the doubler / overpatch 2 adhere to each other over the entire surface.

When the adhesive film 4 and the doubler / overpatch 2 are completely adhered to each other, the vacuum bag film 5 is removed, and the doubler / overpatch 2 and the adhesive film 4 are removed.
Is taken out and the adhesive film 4 is trimmed according to the size of the doubler / overpatch 2. The doubler / overpatch 2 obtained by trimming the adhesive film 4 is taken out from the platen 1 and turned over so that the adhesive film 4 is on the lower side as shown in FIG. 8 so as not to strongly adhere to the bonding portion.

Next, a spacer 9 is arranged so as to surround the doubler / overpatch 2. Spacer 9
The height and the position of the doubler / overpatch are set so that the entire circumference of about 10 mm at the end of the doubler / overpatch can be appropriately pressed so as not to be crushed and hinder the discharge of air bubbles and the like inside the adhesive layer. ing. That is, the vacuum bag film 5
The pressure of the atmospheric pressure at the end is slightly weakened by the tension of. A heat blanket 10 is placed on the spacer 3.
Are arranged so as to cover the doubler / overpatch 2, and a vacuum bag film 11 is further arranged thereon. Between the vacuum bag film 11 and the adherend 8,
Sealed with sealant 12, vacuum bag film 11
Is connected to a vacuum line 14, and the vacuum line 14 is connected to a vacuum device (not shown).

When a vacuum device (not shown) is operated, FIG.
As shown in (b), the space surrounded by the vacuum bag film 11 is evacuated, and the doubler /
The overpatch 2 comes into close contact with the adherend 8 from the center toward the end (outer periphery) and removes air. in this case,
As shown in FIG. 2 (c), moderate pressure is applied to the doubler / overpatch to the entire circumference of about 10 mm at the end so as not to hinder the discharge of air bubbles and the like inside the adhesive layer even when pressed. The height and position of the spacer 9 so that The spacer 9 thus set has a gap of about 2 to 5 mm between the upper surface thereof and the heat blanket 10. By heating and curing with the heat blanket 10 as it is, a good adhesive layer free from defects due to bubbles can be obtained.

FIG. 3 is a view showing a second embodiment of the method for molding a composite material according to the present invention.

In the second embodiment, the doubler / overpatch 2 having a small thickness and low rigidity is bonded to the bonding portion of the bonded body 8a.

In the second embodiment, similarly to FIG. 1 of the first embodiment, a spacer 3 is arranged on a surface plate 1 so as to surround a doubler / overpatch 2, and a spacer 3 is provided on the spacer 3. An adhesive film 4 is fixed so as to stretch the film, covered with a vacuum bag film 5 from above, sealed with a sealant 6, a vacuum line 7 is connected to a vacuum line 7, and a vacuum is gradually drawn. The adhesion of the adhesive film 4 to the doubler / overpatch 2 starts. further,
By increasing the degree of vacuum, the contact area between the doubler / overpatch 2 and the adhesive film 4 gradually widens, and finally, when the contact area of the adhesive film 4 reaches the end of the doubler / overpatch 2, the vacuum bag film 5
Taken out of

Doubler / overpatch 2 taken out
Is turned over so that the adhesive film 4 is on the lower side, and FIG.
As shown in (a), it is spread on the upper surface of a spacer 9a installed so as to surround the bonding target portion of the adherend 8a, a heat blanket is placed thereon, and a vacuum bag film 11 is placed thereon. Bag film 1
1 and the body 8a are sealed with a sealant 12. Then, a vacuum line 13 as shown in FIG. 3B is connected to a vacuum base 13 provided on the vacuum bag film 11. The vacuum line 14 is connected to a vacuum device (not shown).

When a vacuum device (not shown) is operated, FIG.
As shown in (b), the space surrounded by the vacuum bag film 11 is evacuated, and the differential pressure between the inside and outside of the vacuum bag film 11 causes the doubler / overpatch 2 to move from the center to the outside so as to exclude air. To the part to be bonded 8a. In this case, as shown in FIG. 3C, the entire circumference of about 10 mm around the end of the doubler / overpatch 2 is:
Since it is supported by the spacer 9a set at a height and a position so as to obtain an appropriate pressurization so as not to be crushed and hinder the discharge of air bubbles and the like inside the adhesive layer, air is confined in the adhesive layer. It will not be done. After the vacuum bag film 11 is removed and the adhesive film 4 is trimmed, the heat blanket 10a is placed on the spacer 9a, sealed with the vacuum bag film 11, evacuated, and pressurized. In a desirable spacer 9a, an interval of about 2 to 5 mm is formed between the heat blanket 10a and the upper surface of the spacer 9a. Then, by heating and curing with the heat blanket 10a as it is, an adhesive layer free from defects due to bubbles can be obtained. Bonded body 8a and adhesive film 4
Since no air is trapped between the layers, the internal quality is further improved as compared with the first embodiment.

FIG. 4 and FIG. 5 are views showing a third embodiment of the method for forming a composite material according to the present invention.

In the third embodiment, FIG.
As shown in the figure, the adhesive film 4 is fixed so as to stretch the film on the upper surface of the spacer 9b installed so as to surround the bonding target portion of the adherend 8b, and the vacuum bag film 5 is covered therefrom. Sealed. The vacuum base 7 is connected to a vacuum line.

When the sealed space of the vacuum bag film 5 is gradually evacuated, as shown in FIG. 4B, the adhesive film 4 starts to come into close contact with the bonding target portion from the center and further increases the degree of vacuum. Then, as shown in FIG. 4C, the adhesion range of the adhesive film 4 gradually widens, and finally, the adhesion range of the adhesive film 4 reaches the end portion of the bonding target portion. In this manner, the adhesive film 4 is spread on the bonding target site without wrinkles.

When the adhesion range of the adhesive film 4 reaches the end of the bonding target portion, the vacuum bag film 1
1. A double-sided tape is adhered to the back surface of 1 and the doubler / overpatch 2 is fixed via the double-sided tape. Next, the adhesive film 4 is trimmed except for the vacuum bag film 5 placed on the adhesive film 4, and the vacuum bag film 11 is placed on the adhesive film 4 with the doubler / overpatch 2 on the lower side as shown in FIG. , And sealed again with the sealant 12, and the vacuum line 13 is connected to the vacuum base 13. The vacuum line 14 is connected to a vacuum device (not shown).

Next, When the vacuum is gradually applied, FIG.
As shown in (2), the doubler / overpatch 2 is tightly attached to the adhesive film 4 toward the outer periphery so as not to get air from the center. In this case, the height and position of the doubler / overpatch 2 are adjusted so that the entire periphery of the end portion is crushed by about 10 mm and a suitable pressurization is obtained so as not to hinder the discharge of air bubbles and the like inside the adhesive layer. Spacer 9 set
Since it is supported by b, the entrained air is not trapped in the adhesive layer. When the doubler / overpatch 2 is brought into close contact with the adhesive film 4, the vacuum bag film is removed, and the heat blanket is placed on the spacer 9b. The upper part is covered with a vacuum bag film 11 to be sealed, and is evacuated and cured by heating with a heat blanket 10b. At this time, in the desirable spacer 9b,
There is a gap of about 2 to 5 mm between the heat blanket 10b and the upper surface of the spacer 9b. Since the contact between the adherend 8b and the doubler / overpatch 2 is performed while vacuuming, the internal quality is further improved as compared with the first embodiment, and it does not depend on the rigidity of the doubler / overpatch.
The range of application is wider than in the second embodiment.

In the above embodiment, the doubler / overpatch is subjected to high pressure (3 to 6 kg /
cm ² ) and cut into a desired shape are used, but it is also possible to heat and cure the adhesive film simultaneously with the prepreg cut into the desired shape. At this time, it is desirable to place a plate of a rigid iron plate (about 0.5 mm thick) on the uncured prepreg to maintain the smoothness of the doubler / overpatch.

In the above embodiment, the heating means using a heat blanket has been described, but an oven can be used as the heating means. The trimming of the adhesive film can be carried out with a hot knife or a skilled worker with a knife.

FIG. 6 shows a composite material forming apparatus according to another embodiment of the present invention. The composite material forming apparatus 20 according to the present invention includes a pressure-resistant cylindrical body 21 formed of a transparent acrylic resin, an aluminum upper lid 22 hermetically fixed to the upper end of the cylindrical body 21, and a lower end of the cylindrical body 21. And a silicon sheet 23 for ensuring airtightness. A vacuum gauge 24, a vacuum pipe 25 with an on-off valve, and an aluminum rod 26 are arranged on the aluminum upper lid 22. The aluminum rod 26 has a patch sticking plate 27 at the lower end, and is slidably supported by the upper lid 22. An O-ring 28 for sealing a gap with the rod 26 is provided on the upper lid 22.
Is installed.

Next, the operation will be described.

As shown in FIG. 7A, the composite material part 30
The adhesive 32 is applied to the repair part (smooth finish part or tapered shape damage removing part) 31 of the above. The patch 33 is adhered to the lower surface of the patch attaching plate 27 via a double-sided adhesive tape.

Next, the rod 26 is pulled up (the patch is suspended), the patch 33 provided on the patch attaching plate 27 is positioned immediately above the repair part 31 of the composite component 30, and the cock of the vacuum pipe is turned on. Open to remove air from equipment. At this time, the gap between the rod 26 and the upper lid 22 is sealed by an O-ring, and the device and the repair unit 3
The silicon sheet 23 secures the gap with the gap 2. The air trapped in the bonding surface of the adhesive 32 applied to the repair unit 31 is completely degassed as the inside of the apparatus becomes vacuum.

When the vacuum in the apparatus is confirmed by the vacuum gauge 24, the rod 26 to which the patch 33 is attached is gradually pushed down as shown in FIG. Press. By this operation, air entrained on the surface of the repair part and the adhesive, and between the adhesive and the patch joint surface are completely eliminated.

When the patch 33 is sufficiently pressed against the repair unit 31, the vacuum in the apparatus is released to the atmosphere and the patch 33 is peeled off from the patch application plate 27 while holding the patch 33 by hand as shown in FIG. 7C.

The composite component 30 to which the patch 33 is adhered is
Bagging is made with a heating blanket, a glass woven fabric, and a nylon bag, and the patch 33 is bonded to the repair unit 31 by heating the blanket and applying atmospheric pressure.

In the composite material molding apparatus according to the present invention, the patch can be joined in a space where air is completely eliminated and cut off so that air that is trapped when the patches are bonded is eliminated or minimized. Therefore, by bonding the patches in a state where the air is completely removed, it becomes possible to bond non-voids that are trapped in the joint and have no air.

As shown in FIG. 8, the aluminum rod 26a
May be provided as a hollow pipe, a patch-like bag-like rubber 27a is provided at the lower end of the hollow pipe, and the patch 33 may be pressed against the repair unit 31 by using compressed air force guided to the bag-like rubber 27 through the hollow pipe.

As shown in FIG. 9, the cylindrical body 21a and the silicon sheet 23a are formed in a shape corresponding to the repaired portion 31 of the composite material part 30, so that the bottom surface shape can be applied to a part having any curved shape. Can be.

[0050]

According to the method of forming a composite material of the present invention, the adhesive film is gradually brought into close contact with each other while expelling air from the center to the end portion by utilizing the vacuum pressure and the tension of the vacuum bag film. In addition to the fact that there is little entrainment, the operation is performed under reduced pressure because a vacuum pressure is used, and the amount of air that is present is small, so that the entrained air is reduced and a defect-free adhesive layer can be obtained.

The composite material forming apparatus of the present invention can reliably remove air entrapped at the time of patch bonding when performing patch repair of a composite material part, and can perform high quality repair without voids. A stable and high-quality adhesive repair can always be performed without being affected by the skill of the worker.

[Brief description of the drawings]

FIG. 1 is a diagram showing a stage before a first embodiment of a method for forming a composite material according to the present invention.

FIG. 2 is a view showing a later stage of the first embodiment of the method of forming a composite material according to the present invention.

FIG. 3 is a view showing a stage prior to a second embodiment of the method for forming a composite material according to the present invention.

FIG. 4 is a view showing a later stage of the second embodiment of the method of forming a composite material according to the present invention.

FIG. 5 is a view showing a later stage of the third embodiment of the method of forming a composite material according to the present invention.

FIG. 6 is a schematic perspective view of an apparatus for forming a composite material according to the present invention.

FIG. 7 is a view showing an operation stage of the composite material forming apparatus according to the present invention;

FIG. 8 is a view showing a modified example of the composite material forming apparatus according to the present invention.

FIG. 9 is a view showing a modified example of the composite material forming apparatus according to the present invention.

[Explanation of symbols]

 Reference Signs List 1 surface plate 2 doubler / overpatch 3 spacer 4 adhesive film 5 vacuum bag film 6 sealant 8 adherend 9 spacer 10 heat blanket 11 vacuum bag film 20 forming device 21 cylindrical body 22 top lid 23 silicon sheet 26 rod 27 patch attaching plate 30 Composite parts 31 Adhesive 32 Repair department 33 Patch

Claims (7)

[Claims] 1. An adhesive film is adhered from the central portion to the end of the bonded portion of the adherend or the doubler / overpatch, and the doubler / overpatch is adhered to the bonded portion of the adherend from the central portion to the end. A method for forming a composite material, comprising: applying pressure and heating and curing under pressure. 2. The method according to claim 1, wherein the attaching of the adherend to the adhesive film or the pressurization of the doubler / overpatch is performed by evacuating a sealed space at atmospheric pressure. Molding method of composite material. 3. Placing the doubler / overpatch and the spacer surrounding the doubler / overpatch on a flat plate that is not breathable, spreading an adhesive film on the spacer,
The whole is sealed with a vacuum bag film, the sealed space of the vacuum bag film is evacuated, the adhesive film is stuck from the center to the end of the doubler / overpatch, the vacuum bag film is removed, and the adhesive film is doubled. / Trim to match the overpatch and doubler /
Arrange the overpatch at the adhesion site so that the adhesive film faces the adherend and place a spacer around it,
The whole is sealed with a vacuum bag film, and the sealed space of the vacuum bag film is evacuated so as to be in close contact with the center of the doubler / overpatch from the end, and then heat-cured while evacuating. A method of forming a composite material. 4. The doubler / overpatch and a spacer surrounding the doubler / overpatch are placed on a flat plate that is not breathable, and an adhesive film is spread on the spacer.
The whole is sealed with a vacuum bag film, the sealed space of the vacuum bag film is evacuated, the adhesive film is attached from the center of the doubler / overpatch to the end, the vacuum bag film is removed, and the adhesive film is covered with the adhesive film. The doubler / overpatch is stretched on the spacer with the adhesive facing, the whole of the doubler / overpatch is sealed with a vacuum bag film, and the sealed space of the vacuum bag film is adhered from the center to the end of the doubler / overpatch. The vacuum bag film is removed, the vacuum bag film is removed, the adhesive film is trimmed to match the doubler / overpatch, the doubler / overpatch is sealed over the spacer with the vacuum bag film, and the sealed space of the vacuum bag film is evacuated. A method of forming a composite material, wherein the composite material is heat-cured while being heated. 5. A spacer is disposed around a bonding portion of an object to be bonded, an adhesive film is spread on the spacer, these are sealed with a vacuum bag film, and the sealed space of the vacuum bag film is evacuated to form an adhesive film. From the center to the end of the bonding area, remove the vacuum bag film, trim the adhesive film, and attach a doubler / overpatch to the vacuum bag film.
With the overpatch facing the bonding area, seal the bonding area with a vacuum bag film from above the spacer, evacuate the sealed space of the vacuum bag film and tightly attach the doubler / overpatch from the center to the end, and vacuum bag A method for forming a composite material, wherein a heat curing treatment is performed while vacuuming a sealed space of a film. 6. An adhesive is stuck to an adhered portion of an object to be adhered or a doubler / overpatch, and the bonded portion is sealed, evacuated to a predetermined pressure, and the doubler / overpatch is evacuated to a predetermined pressure. A method for forming a composite material, comprising: applying pressure while adhering to an adhesion portion of an object to be adhered; and performing heat-curing treatment while applying pressure while being evacuated. 7. A transparent pressure-resistant cylinder, an upper lid hermetically fixed to the upper end of the cylinder, a silicon sheet provided at the lower end of the cylinder to ensure airtightness, and a slidable upper lid. An apparatus for forming a composite material, comprising: an operating body with a plate for applying a patch supported by a member; and a vacuum device for evacuating the inside of the cylindrical body.