JP2006192628A - Method and apparatus for forming composite material structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a technique capable of forming a homogeneous FRP member or the like having high strength. <P>SOLUTION: A molding machine 10 comprises a plurality of resin injection members 20 and a plurality of suction members 30, and injection valves 25 and suction valves 35 are provided to the resin injection members 20 and the suction members 30, and automatically controls the opening and closing (opening degrees) of the injection valves 25 and the suction valves 35 by a controller 60. The controller 60 controls the injection valves 25 of the resin injection members 20 on the basis of the detection signals from impregnation sensors 40 corresponding to the progress state of the injection/impregnation of the resin in the stage after the start of the injection of the resin and, after the injection/impregnation of the resin, the pressures of the resin charged in spaces S are detected at respective parts by pressure sensors 50 and the opening and closing (opening degrees) of the suction valves 35 of the suction members 30 or the injection valves 25 of the resin injection members 20 are controlled on the basis of the detected pressures to equalize the distribution of the pressures of the resin charged in the spaces S. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a composite material structure forming apparatus and a composite material structure forming method.

  In recent years, composite materials such as FRP (Fiber Reinforced Plastic) and CFRP (Carbon Fiber Reinforced Plastic) as materials having light weight and high strength have been used in aircraft main wings, ships, large windmill rotors, railway vehicles, and construction fields. Widely used in various fields including structural members. FRP, CFRP (hereinafter simply referred to as FRP) is a thermosetting resin or the like in a state where a tape-like or mat-like reinforcing fiber substrate made of reinforcing fibers such as glass fibers and carbon fibers is molded by a mold. It is formed into a predetermined shape by impregnating the resin and curing it.

Here, a member formed by FRP (hereinafter referred to as FRP member) is required to have a predetermined strength. The strength of the FRP member is ensured by reliably impregnating the reinforcing fiber base with resin.
Therefore, in particular, in the field where FRP members are industrially produced, a device has been devised for reliably impregnating a reinforcing fiber base with a resin during molding. As one of such contrivances, a reinforcing fiber base material is placed on a mold and covered with a bag material, and then the space surrounded by the bag material and the mold is sucked with a vacuum pump or the like to create a negative pressure. There is one that introduces resin into this space (see, for example, Patent Document 1).

JP 2003-11136 A (Claim 1 etc.)

  However, in the method described above, the use of the negative pressure can surely promote the impregnation of the resin into the reinforcing fiber base, but the injection / impregnation of the resin is the result of only the negative pressure. The injection / impregnation situation is not controlled at all. In such a method, for example, when forming a small FRP member up to about 2 to 3 m, for example, when forming a large FRP member such as 10 m, a portion where the resin is not sufficiently impregnated occurs. For example, it becomes difficult to form the FRP member with high quality.

  Therefore, when forming a large FRP member, resin is sequentially injected from a plurality of injection ports, and after injecting resin from a certain injection port, the injected resin is detected by a sensor, and its position (resin detection is performed). A technique has also been proposed in which resin is injected from another injection port in accordance with the position of the sensor (for example, see Patent Document 2).

JP 2003-53744 A (Claim 1 etc.)

According to this technique, although the resin can be reliably injected and impregnated as a whole, the resin packing density cannot be finely adjusted. As a result, the obtained FRP member has less resin than the reinforcing fiber base, or conversely, depending on the part. Thus, it is still difficult to form a homogeneous FRP member.
The present invention has been made on the basis of such a technical problem, and is a composite material structure forming apparatus capable of forming an FRP member or the like that is homogeneous and has high strength, even if it is large. It aims at providing the formation method of a composite material structure.

The present invention made for this purpose is a composite material structure forming apparatus for forming a composite material structure having a predetermined shape with a composite material containing reinforcing fibers and a resin, and has a shape corresponding to the composite material structure. An airtight sheet in which the reinforcing fiber base material is sandwiched between the mold and the airtight sheet and the mold in a state where the reinforcing fiber base material formed from the reinforcing fiber is placed along the surface of the mold. Resin injection means for injecting resin into the space, pressure detection means for detecting the pressure of the resin injected into the space by the resin injection means, and pressure of the resin at multiple locations in the space detected by the pressure detection means And pressure distribution adjusting means for adjusting the pressure distribution of the resin in the space.
Thus, if there is a portion where the pressure is too high or too low among the pressures of the resin at a plurality of places detected by the pressure detection means, by adjusting the pressure of the resin at that portion by the pressure distribution adjustment means, It becomes possible to equalize the pressure distribution of the resin.

Such a composite material structure forming apparatus further includes suction means for sucking the atmosphere of the space to make the inside of the space have a negative pressure, and forming a large composite material structure by making the inside of the space a negative pressure state. Even in this case, it is possible to efficiently inject the resin into the space and impregnate the reinforcing fiber base material. In addition, after the start of the resin injection, the resin filled in the space (the surplus) can be sucked and removed by the suction means while the resin is injected from the resin injection means.
When a plurality of suction means are provided, the pressure distribution adjusting means can adjust the pressure distribution of the resin in each portion by adjusting the suction pressure in the plurality of suction means. That is, the resin at a portion where the pressure is too high can be sucked by the suction means to reduce the pressure.

  Further, a plurality of resin injection means are provided, and the pressure distribution adjusting means can adjust the pressure distribution of the resin by adjusting the injection pressure of the resin into the space in the plurality of resin injection means. For this purpose, the injection pressure of the resin (that is, the flow rate per unit time) is lowered for a portion where the pressure is too high, and conversely, the injection pressure of the resin is raised for a portion where the pressure is too low.

  When adjusting the pressure distribution of the resin with such suction means and resin injection means, valves are provided for each of the plurality of suction means and resin injection means, and the opening / closing or opening degree of these valves is controlled by the pressure distribution adjustment means. By doing so, it is preferable to adjust the resin suction degree and the resin injection degree in each part.

  The resin injection means is preferably provided on both the airtight sheet side and the mold side. By doing so, the resin can be injected / impregnated from both sides of the reinforcing fiber base material, the injection / impregnation can be performed efficiently, particularly when forming a composite material structure having a large thickness. Particularly preferred.

The adjustment of the resin pressure distribution by the pressure distribution adjusting means as described above is performed after the reinforcing fiber base material is impregnated with the resin. Prior to this, in the step of injecting resin into the space between the mold and the airtight sheet and impregnating the reinforcing fiber base with resin, the resin is sequentially injected from a plurality of resin injection points at an appropriate timing according to the impregnation state. In order to be able to do so, it is preferable to further include resin detection means for detecting the resin impregnation state in the space by detecting the resin injected into the space at a plurality of locations in the space.
At this time, an ideal impregnation state of the resin into the space can be simulated in advance, and the progress of the resin impregnation can be controlled based on the simulation. In that case, the simulation data indicating the pre-impregnation state of the resin into the space is compared with the impregnation state of the resin into the space detected by the resin detection means, and the actual impregnation state based on the comparison result Is adjusted by the impregnation condition adjusting means so that the resin injection means approaches the impregnation condition in the simulation data or does not leave a large distance.

  The present invention may be a method of forming a composite material structure having a predetermined shape with a composite material containing reinforcing fibers and a resin. In this method, the reinforcing fiber base material is covered with an airtight sheet with the airtightness in a state where the reinforcing fiber base material is placed along the surface of the mold having a shape corresponding to the composite structure, and the outer peripheral portion of the airtight sheet is formed into the mold. A step of hermetically sealing against, a step of sucking the atmosphere of the space between the hermetic sheet and the mold to make the space negative pressure, a resin is injected into the space, and the resin is applied to the reinforcing fiber base in the space A step of impregnating, and a step of detecting the pressure of the resin injected into the space at a plurality of locations, and adjusting a pressure distribution of the resin in the space based on the detected pressure.

  According to the present invention, the pressure of the resin injected into the space between the reinforcing fiber substrate and the mold is detected at a plurality of locations, and the pressure distribution of the resin in the space is adjusted based on the detection result. In addition, the pressure distribution of the resin can be equalized, the dispersion of the ratio of the resin to the reinforcing fiber in the obtained composite structure can be suppressed, and the composite structure can be homogenized. As a result, it is possible to form a composite material structure such as a FRP member having a uniform and high strength even if it is large.

Hereinafter, the present invention will be described in detail based on embodiments shown in the accompanying drawings.
FIG. 1 is a view for explaining the configuration of a molding apparatus (composite structure forming apparatus) 10 used for forming an FRP member (composite structure) in the present embodiment.
As shown in FIG. 1, the molding apparatus 10 includes a mold 11 and a sheet-like bag material (airtight sheet) 12, and the reinforcing fiber substrate 100 is sandwiched between the mold 11 and the bag material 12. The resin is introduced into the space S between the mold 11 and the bag material 12 and impregnated into the reinforcing fiber base 100 to form the FRP member.
Therefore, the mold 11 has a molding surface 11a corresponding to the shape of the FRP member to be formed. In FIG. 1, the molding surface 11a is substantially planar, but of course, the molding surface 11a can have various shapes such as a curved surface and an uneven surface depending on the shape of the FRP member to be formed.

  The bag material 12 is formed of a material having flexibility and airtightness such as a rubber-based material. The bag material 12 is configured such that the outer peripheral portion 12 a can be fixed to the molding surface 11 a of the mold 11 via the seal material 13.

Further, the reinforcing fiber base 100 can be formed by forming reinforcing fibers such as glass fibers and carbon fibers into a tape shape or a mat shape and laminating them in one layer or a plurality of layers. By laminating the reinforcing fibers in a plurality of layers, the reinforcing fiber substrate 100 can be formed into a thick plate having a thickness of 10 to 100 mm, for example.
Moreover, what is used as resin materials, such as unsaturated polyester resin, vinyl ester resin, an epoxy resin, a phenol resin, can be used suitably for resin.

As shown in FIGS. 1 and 2, such a molding apparatus 10 includes a resin injection member (resin injection means) for injecting resin into the space S on the molding surface 11 a of the mold 11 and the inner surface side of the bag material 12. ) 20 and a suction member (suction means) 30 for sucking the atmosphere of the space S.
Here, it is preferable that the resin injection member 20 and the suction member 30 are arranged so that the resin injection or the atmosphere suction can be efficiently performed in a wide range of the space S. For this reason, in this Embodiment, the resin injection member 20 and the suction member 30 are each formed in the shape of a line which continues in one direction, and this is arranged in multiple numbers. The resin injection member 20 and the suction member 30 are provided with openings or slits 21 and 31 continuous in the longitudinal direction of the resin injection member 20 and the suction member 30 or the resin injection member 20 in order to discharge resin or suck the atmosphere. A plurality of holes arranged in the longitudinal direction of the suction member 30 are formed. In addition to this, as the resin injection member 20 and the suction member 30, a discharge port for discharging the resin or a suction port for sucking the atmosphere is formed in a matrix at a position facing the molding surface 11a of the mold 11 and the inner surface of the bag material 12. It is also possible to arrange them.

As shown in FIG. 2, each of a plurality of resin injection members 20 arranged in parallel has a pump 27 that sends out resin from a resin container 26 through an injection valve 25 for adjusting the discharge amount (discharge pressure) of the resin. It is connected to the.
Similarly, each of the plurality of suction members 30 arranged in parallel is a vacuum pump that generates a negative pressure for sucking the atmosphere from the space S via a suction valve 35 for adjusting the suction amount (suction pressure) of the atmosphere. 36.

  As shown in FIGS. 1 and 2, the reinforcing fiber base 100 is set in the space S between the mold 11 and the bag material 12, and a gap is formed between the reinforcing fiber base 100 and the mold 11 and the bag material 12. A plurality of impregnation sensors (resin detection sensors) 40 for detecting the presence or absence of resin impregnation and pressure sensors (pressure detection sensors) 50 for detecting pressure are arranged at the positions.

As the impregnation sensor 40, for example, as disclosed in Japanese Patent Application Laid-Open No. 2001-27678, light is irradiated and the presence or absence of a liquid resin is detected from a change in the emitted light or scattered light. The dielectric sensor etc. which are indicated by -53744 gazette can be used.
The pressure sensor 50 may be a diaphragm type, for example. The pressure sensor 50 can detect the pressure of the space S when the atmosphere of the space S is sucked, and can detect the pressure of the filled resin when the resin is injected into the space S and filled. .

  The molding apparatus 10 is further provided with a controller (pressure distribution adjusting means, impregnation condition adjusting means) 60 for controlling the operation based on a program stored in advance. Under the control of the controller 60, in the molding apparatus 10, the atmosphere in the space S is sucked by the vacuum pump 36 in a state where the reinforcing fiber base 100 is set in the space S between the mold 11 and the bag material 12. After that, it is preferable to make a substantially vacuum state), and then the resin is injected into the space S by the pump 27 to form the FRP member.

  In the present embodiment, the controller 60 mainly controls the injection valve 25 of the resin injection member 20 and the suction valve 35 of the suction member 30 based on detection signals from the impregnation sensor 40 and the pressure sensor 50. As a result, the controller 60 performs control for reliably impregnating the reinforced fiber base material 100 with the injected resin when the resin is injected, as will be described later.

  More specifically, first, at the stage where the atmosphere of the space S is sucked into a negative pressure prior to resin injection, the controller 60 detects the atmospheric pressure of the space S based on the detection signal from the pressure sensor 50, and It is determined whether the pressure has reached a predetermined atmospheric pressure, and the resin injection start timing is controlled.

Further, at the stage after the start of the resin injection, the controller 60 determines whether or not the resin is reliably injected into the entire region to be injected based on the detection signal from the impregnation sensor 40, and the progress of the resin injection. It is determined whether the situation is as planned, and the injection of resin is controlled based on the determination result.
At this time, in the present embodiment, the progress of the resin injection is simulated in advance, and the controller 60 determines whether the progress of the resin injection is as planned based on the simulation data. . Such simulation includes product shape, number and position of resin injection member 20, suction member 30, position of impregnation sensor 40, pressure sensor 50, order of opening injection valve 25 of resin injection member 20 during resin injection, and time of injection Simulation using Darcy's empirical rule based on the vacuum (pressure in space S) conditions and molding conditions (resin type, viscosity, molding time, etc.) of the resin filled in space S It is preferable to use a technique.
According to Darcy's rule of thumb, it is assumed that the behavior of the resin flowing through the reinforcing fiber substrate 100 due to the pressure difference is the same as the liquid flow phenomenon in the porous body, and the permeation flow rate Q of the resin is
Q = KA · ΔP / L
It is known that it is expressed by the relational expression Here, K is the transmittance, A is the column (flow path) cross-sectional area, ΔP is the pressure difference across the column, and L is the length of the column.
As data obtained by simulation using such a simulation method, for example, when resin is injected, an estimated time (in which the presence of the resin is detected by the impregnation sensor 40 arranged in each part in the space S) ( (Elapsed time from the start of injection). Also, by simulation, the order of opening the injection valve 25, the timing of opening, etc. for performing ideal impregnation with high efficiency and high reliability are obtained, and based on the information thus obtained, the resin is actually It is possible to control the order of opening the injection valve 25, the opening timing, and the like when injecting.

  Further, at the stage where the injection of the resin into the space S is completed, the controller 60 detects the pressure of the resin filled in the space S at each part based on the detection signal from the pressure sensor 50, and based on the detected pressure in the space S Control is performed so that the pressure distribution of the filled resin is equalized.

Hereinafter, a method of forming the FRP member having a predetermined shape by the molding apparatus 10 will be described with a focus on the contents of control by the controller 60 as described above.
First, in accordance with the FRP member to be molded, the space S is set to a predetermined vacuum condition in a state where the reinforcing fiber base 100 is set in the space S by a simulation method based on Darcy's law, and a predetermined order / timing is further determined. A simulation is performed when the injection valves 25 of the plurality of resin injection members 20 are opened.

After completion of the simulation, the reinforcing fiber substrate 100 is set along the mold 11, the bag material 12 is set, and the outer periphery thereof is hermetically sealed.
Thereafter, an operator operates a predetermined switch of the molding apparatus 10 to inject a resin into the space S between the mold 11 and the bag material 12 and impregnate the reinforcing fiber base 100 with the resin to cause FRP. The operation for forming the member is started.

As shown in FIG. 3, when the controller 60 accepts the above operation, the controller 60 opens the suction valve 35 of the suction member 30, starts suction of the atmosphere in the space S by the vacuum pump 36, and reduces the atmospheric pressure. (Step S101).
The pressure sensor 50 detects the atmospheric pressure in the space S and outputs a detection signal to the controller 60. The controller 60 monitors the detection signal from the pressure sensor 50, and determines whether or not the atmospheric pressure in the space S has reached a predetermined vacuum pressure (negative pressure) (step S102).

  After determining that the atmospheric pressure in the space S has reached a predetermined vacuum pressure, the injection valve 25 of the resin injection member 20 is opened in a predetermined order and timing, and the resin container 26 by the pump 27 is moved from the resin container 26 to the space S. The resin injection is started (step S103). At this time, the order and timing of opening the injection valve 25 of the resin injection member 20 is controlled based on the simulation data so that the space S can be impregnated with resin efficiently and reliably.

Each of the plurality of impregnation sensors 40 arranged in each part in the space S detects whether or not there is resin within the detection range. After the start of the resin injection, the controller 60 monitors the detection signal from the impregnation sensor 40 and detects whether or not the presence of the resin is detected in each impregnation sensor 40 (step S104).
And the data of the result of the simulation performed beforehand are referred and compared with the detection result by the impregnation sensor 40 (step S105). As described above, the simulation result data includes the estimated time for detecting the presence of the resin by the impregnation sensor 40 in each part after the resin injection is started. The detection results are compared, and it is determined whether or not the detection result of the presence of the resin in each impregnation sensor 40 is within an allowable range based on the predicted time (step S106). In other words, if the impregnation of the resin proceeds faster than the simulation, the presence of the resin is actually detected by the impregnation sensor 40 that cannot detect the presence of the resin at that time. On the contrary, if the impregnation of the resin progresses later than the simulation, the impregnation sensor 40, which should have already detected the presence of the resin at that time, does not detect the presence of the resin in practice.
As described above, when there is an impregnation sensor 40 that outputs a detection result different from the simulation, the controller 60 determines whether the injection valve 25 of the resin injection member 20 is open or closed (including the opening degree) and the progress of the resin impregnation. Is adjusted in the direction matching the simulation (step S107). That is, if the impregnation of the resin has progressed faster than the simulation at a specific part, the opening of the injection valve 25 of the resin injection member 20 is reduced so that the injection speed of the resin to that part decreases, conversely, If the impregnation of the resin progresses later than the simulation at a specific part, the opening degree of the injection valve 25 of the resin injection member 20 is increased so that the injection speed of the resin to the part increases.

  As described above, the resin impregnation state in the space S is monitored and controlled, and the resin injection is continued until all the impregnation sensors 40 confirm the presence of the resin (step S108). When the presence of the resin is confirmed by all the impregnation sensors 40, it is determined that the resin impregnation is completed, and the injection valve 25 of the resin injection member 20 is closed (or the opening thereof is reduced) (step S109).

When the resin is poured into the space S, the pressure sensor 50 detects the pressure of the resin.
After the resin injection is completed, the controller 60 monitors the pressure of the resin detected by the plurality of pressure sensors 50 based on the detection signal from the pressure sensor 50 (step S110).
As a result, if the pressure of the resin detected by each pressure sensor 50 is within a predetermined allowable range, the pressure (filling density) of the resin in the space S is assumed to be substantially uniform, and the suction valve of the suction member 30 35 is closed (if only the opening of the injection valve 25 of the resin injection member 20 is reduced in step S109, the injection valve 25 of the resin injection member 20 is also closed here), and the resin injection / impregnation is completed (step S109). S111 to S112).
On the other hand, when there is a pressure sensor 50 in which the detected resin pressure is outside the predetermined allowable range, the controller 60 adjusts the suction valve 35 of the suction member 30 (step S113). For example, when there is a pressure sensor 50 whose resin pressure is higher than an allowable range, the opening of the suction valve 35 of the suction member 30 in the vicinity of the pressure sensor 50 is increased, and excess resin is removed from the space S by the suction member 30. To suck. Conversely, when there is a pressure sensor 50 whose resin pressure is lower than the allowable range, the opening of the suction valve 35 of the suction member 30 in the vicinity of the pressure sensor 50 is reduced, and the suction member 30 is compared with the other portions. By reducing the suction speed of the resin, it is possible to balance with other parts. As described above, when there is a pressure sensor 50 whose resin pressure is lower than the allowable range, the injection valve 25 of the corresponding part of the resin injection member 20 is re-opened because the resin injection / impregnation is insufficient. You may make it perform replenishment filling.

  Thus, after injecting resin into the space S and impregnating the reinforcing fiber base 100, the resin is cured by applying heat or the like, whereby a FRP member having a predetermined shape can be formed. Therefore, after this, the bag material 12 may be removed from the mold 11 and the molded FRP member may be taken out.

As described above, the molding apparatus 10 includes a plurality of resin injection members 20 and suction members 30, and the resin injection member 20 and the suction member 30 include an injection valve 25 and a suction valve 35. The opening and closing (opening) of the suction valve 35 is automatically controlled by the controller 60.
At the time of vacuum suction, the controller 60 detects the atmospheric pressure in the space S based on the detection signal from the pressure sensor 50 and controls the suction valve 35 of the suction member 30, so that the atmospheric pressure is optimally controlled. And the impregnation rate can be controlled. As a result, the injection / impregnation time of the resin can be shortened to speed up the molding.

  Further, in the stage after the start of the resin injection, the controller 60 monitors the progress of the resin injection based on the detection signal from the impregnation sensor 40, and based on the result, the injection valve 25 of the resin injection member 20 is monitored. Since the process is controlled, the progress of resin injection can be controlled. Thereby, resin can be reliably inject | poured and impregnated to the whole, generation | occurrence | production of an impregnation insufficient part can be prevented, and the quality of the FRP member obtained can be improved. Furthermore, the progress of resin injection is simulated in advance using a Darcy law simulation method, and the simulation results are compared with the actual progress to control the resin injection / impregnation to approach the ideal state. it can. This also shortens the injection / impregnation time of the resin and can speed up the molding.

  In addition, the pressure of the resin filled in the space S is detected by the pressure sensor 50 at each part, and based on this, the controller 60 opens and closes (opens) the suction valve 35 of the suction member 30 and the injection valve 25 of the resin injection member 20. By controlling, the pressure distribution of the resin filled in the space S can be equalized. Thereby, ratio of resin and the reinforced fiber base material 100 can be made uniform, and quality improvement of the FRP member obtained can be achieved.

  A plurality of resin injection members 20 are provided on both the mold 11 side and the bag material 12 side. As a result, the reinforcing fiber substrate 100 can be impregnated with the resin from multiple directions, the resin can be impregnated in a short time, and the resin impregnation state can be easily made uniform. Can also contribute. Moreover, by using such a method, it becomes easy to form a thick FRP member having a thickness of 100 mm or more.

In the above embodiment, the configuration of the molding apparatus 10 is as shown in FIGS. 1 and 2. However, the configuration is not limited to this, and other configurations may be used as appropriate as long as the present invention is applicable. It can be. Moreover, if the control content by the controller 60 is also within the scope of the present invention, the control order can be changed or the control content can be changed.
In addition to this, as long as it does not depart from the gist of the present invention, the configuration described in the above embodiment can be selected or changed to another configuration as appropriate.

It is sectional drawing which shows the structure of the shaping | molding apparatus in this Embodiment. It is a top view of a shaping | molding apparatus. It is a figure which shows the flow of a process when a reinforcing fiber base material is impregnated with resin in a shaping | molding apparatus.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Molding apparatus (composite material structure forming apparatus), 11 ... Mold, 12 ... Bag material (airtight sheet), 20 ... Resin injection member (resin injection means), 25 ... Injection valve, 26 ... Resin container, 27 ... Pump 30 ... Suction member (suction means), 35 ... Suction valve, 36 ... Vacuum pump, 40 ... Impregnation sensor (resin detection sensor), 50 ... Pressure sensor (pressure detection sensor), 60 ... Controller (pressure distribution adjusting means, impregnation) (Situation adjusting means), 100.

Claims (8)

A composite material structure forming apparatus for forming a composite material structure having a predetermined shape with a composite material containing reinforcing fibers and a resin,
A mold having a shape corresponding to the composite structure;
An air-tight sheet sandwiched between the mold and the reinforcing fiber base formed from the reinforcing fibers in a state along the surface of the mold;
Resin injecting means for injecting the resin into the space between the airtight sheet and the mold;
Pressure detection means for detecting the pressure of the resin injected into the space by the resin injection means at a plurality of locations;
Pressure distribution adjusting means for adjusting the pressure distribution of the resin in the space based on the pressure of the resin at a plurality of locations in the space detected by the pressure detecting means;
A composite material structure forming apparatus comprising:   The composite material structure forming apparatus according to claim 1, further comprising suction means for sucking an atmosphere of the space to make the inside of the space have a negative pressure. A plurality of the suction means are provided, and the resin filled in the space can be sucked.
The composite material structure forming apparatus according to claim 2, wherein the pressure distribution adjusting unit adjusts the suction pressure in the plurality of suction units. A plurality of the resin injection means are provided,
4. The composite structure forming apparatus according to claim 1, wherein the pressure distribution adjusting unit adjusts an injection pressure of the resin into the space in the plurality of resin injection units. 5.   The composite material structure forming apparatus according to any one of claims 1 to 4, wherein the resin injection means is provided on both the airtight sheet side and the mold side.   2. The apparatus according to claim 1, further comprising resin detection means for detecting the state of resin impregnation into the space by detecting the resin injected into the space at a plurality of locations in the space. The composite material structure forming apparatus according to any one of 5.   The simulation data indicating the state of resin impregnation into the space performed in advance is compared with the state of resin impregnation into the space detected by the resin detection unit, and based on the comparison result, the resin injection unit The composite material structure forming apparatus according to claim 6, further comprising an impregnation state adjusting unit that adjusts the injection of the resin into the space. A method of forming a composite material structure of a predetermined shape with a composite material containing reinforcing fibers and resin,
The reinforcing fiber base is covered with an airtight sheet having airtightness in a state where the reinforcing fiber base is placed along the surface of a mold having a shape corresponding to the composite structure, and the outer periphery of the airtight sheet is Sealing hermetically against the mold;
Sucking the atmosphere of the space between the airtight sheet and the mold, and making the space negative pressure;
Injecting the resin into the space, and impregnating the resin into the reinforcing fiber base in the space;
Detecting the pressure of the resin injected into the space at a plurality of locations, and adjusting the pressure distribution of the resin in the space based on the detected pressure;
A method for forming a composite structure, comprising:

Images