JP2009248512A - Internal pressure molding device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an internal pressure molding device allowing easy fitting work and replacement work of a bag-like body. <P>SOLUTION: A molding die 2 has a communication path 4 causing an interior of a molding chamber 3 to communicate with its exterior, and a closing member 6 is installed attachably and detachably in the communication path 4. In addition, an air valve 11 of the bag-like body 10 is fitted to the closing member 6. Consequently, the bag-like body 10 can be easily fitted to the molding die 2 by fitting the closing member 6 to the communication path 4. and can be easily removed from the molding die 2 by removing the closing member 6 from the communication path 4. Therefore, the bag-like body 10 can be easily attached and detached so that the replacement work of the bag-like body 10 can be easily carried out. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an internal pressure molding apparatus, and more particularly to an internal pressure molding apparatus that molds a molding material by inflating a bag-like body by inflow of pressurized air in a molding chamber of a molding die.

  Fiber Reinforced Resin (FRP) is a combination of thermosetting resin or thermoplastic resin matrix resin and reinforced fiber, and is used in many fields because of its light weight and excellent strength characteristics. . Examples of the thermosetting resin used include unsaturated polyester resins, epoxy resins, and polyimide resins. Examples of thermoplastic resins include polyethylene, polypropylene, and polyamide. Examples of the reinforcing fiber include carbon fiber, glass fiber, and aramid fiber.

  A hollow molded product is also made using a fiber reinforced resin, and one of the molding methods is an internal pressure molding method. In the internal pressure molding method, a hollow molding material is placed in the cavity of the molding die, and the molding material is brought into close contact with the inner surface of the molding die by applying internal pressure to the hollow portion of the molding material. It is a method to do.

  An example of making a hollow molded product using the internal pressure molding method is described in Patent Document 1 or Patent Document 2. In this method, a prepreg, which is an uncured fiber reinforced resin as a molding material, is laminated on the inner surface of the mold and disposed in a hollow shape, and then the bag-shaped body is disposed in the hollow portion along the inner surface of the prepreg and clamped. Thereafter, pressurized air is supplied to the bag-like body to inflate the bag-like body, and the prepregs stacked and arranged by the expansion are brought into close contact with the molding surface of the mold and shaped. Heating is performed in this state, and the bag-like body is removed after the resin is cured.

JP 2003-31845 A JP 2003-334835 A

  However, Patent Document 1 or Patent Document 2 does not have any special consideration regarding attachment or replacement of the bag-like body to the mold. If the bag-like body is displaced when the bag-like body is attached to the mold, a uniform internal pressure cannot be applied to the entire molded article, and uneven thickness may occur in the molded article. Further, when the bag-like body is damaged, there is a problem that it takes time to replace the bag-like body, or the practicality is lacking if the bag-like body cannot be replaced.

  This invention is made | formed in view of said point, and the place made into the objective makes it a subject to provide the internal-pressure shaping | molding apparatus which can implement easily the attachment operation | work of a bag-like body, and an exchange operation.

  The invention of the internal pressure molding apparatus according to claim 1 that solves the above-described problem is a bag-like structure in which pressurized air is caused to flow into a bag-like body in a molding chamber formed by clamping a plurality of molding dies. In an internal pressure molding apparatus that molds a molding material by expansion of a body, a communication path that is formed by clamping and communicates between the interior and exterior of the molding chamber, and air that is provided in the bag and communicates with the interior of the bag An air valve in which a passage is formed, a closing member that is detachably attached to at least one of a plurality of molding dies and closes the communication passage by mold clamping, and is provided on the closing member through the air passage of the air valve. And a valve mounting portion to which an air valve is mounted so that pressurized air can flow into the bag-like body.

  According to the first aspect of the present invention, the bag-like body can be easily attached to the mold by attaching the closing member, and the bag-like body can be easily removed from the mold by removing the closing member. . Therefore, the bag-like body can be easily attached and detached, and the attachment work and the exchange work of the bag-like body can be easily performed.

  Thus, for example, the closing member can be attached to the mold after the molding material is placed in the molding chamber, and the closing member and the bag-like body do not get in the way when the molding material is placed in the molding chamber. The work of placing the molding material on the mold can be facilitated. Further, when removing the molded product formed by molding the molding material from the molding die, the closing member can be removed together with the molded product from the molding die, and the demolding operation can be facilitated.

  Further, the bag-like body can be positioned with respect to the mold by attaching the closing member to the mold. Therefore, the bag-like body can be positioned at a normal position in the hollow portion of the molding material, uniform internal pressure can be applied to the entire molding material, and uneven thickness can be prevented from occurring in the molded product.

  According to a second aspect of the present invention, in the internal pressure molding apparatus according to the first aspect, the air valve is detachably provided on the bag-like body, and the bag is interposed between the valve mounting portion and the valve mounting portion. It has the structure which clamps the opening periphery of a shape body, It is characterized by the above-mentioned.

  According to invention of Claim 2, an air valve can be removed from a bag-like body, for example, a bag-like body can be replaced | exchanged according to the magnitude | size and shape of a molding chamber, for example, a bag-like body deteriorates If so, it can be replaced with a new bag.

  According to a third aspect of the present invention, in the internal pressure molding apparatus according to the first or second aspect of the present invention, the internal pressure molding apparatus includes a vacuuming means for evacuating the interior of the molding chamber.

  According to the invention described in claim 3, the air interposed between the outer surface of the molding material and the molding surface of the molding chamber can be discharged, and the outer surface of the molding material is brought into close contact with the molding surface of the molding chamber. Can be made. Therefore, the outer surface of the molding material can be reliably shaped into a shape along the molding surface.

  According to a fourth aspect of the present invention, there is provided the internal pressure molding apparatus according to the third aspect, wherein a non-molding chamber formed outside the molding chamber by clamping and communicating with the chamber of the molding chamber through the communication path; A pressurized air supply unit that is disposed in the chamber and that can be connected to and disconnected from the air valve and that supplies pressurized air in a connected state, and the evacuation means evacuates the interior of the non-molding chamber, The interior of the molding chamber is indirectly evacuated through the space between the closing members.

  According to the fourth aspect of the present invention, the interior of the non-molding chamber is evacuated and the interior of the molding chamber is indirectly evacuated through the space between the communication path and the closing member. In some cases, the uncured resin can be sealed between the communication path and the closing member, and the uncured resin can be prevented from being sucked out of the molding chamber. Moreover, a non-molding chamber can be utilized as a work space for connecting and disconnecting the pressurized air supply unit to and from the air valve.

  According to a fifth aspect of the present invention, in the internal pressure molding apparatus according to any one of the first to fourth aspects, at least one of the plurality of molding dies is provided with a heating means for heating the molding surface of the molding chamber. It is characterized by that.

  According to invention of Claim 5, it can heat in the position which approached with respect to the shaping | molding raw material arrange | positioned in the shaping | molding chamber. Therefore, for example, compared with the case where the whole mold is heated by a heating furnace, the molding material can be effectively heated, and energy saving can be achieved.

  A sixth aspect of the present invention is the internal pressure molding apparatus according to any one of the first to fifth aspects, further comprising means for supplying a matrix resin into the interior of the molding chamber.

  According to the sixth aspect of the present invention, the molding material not impregnated with the matrix resin is placed in the molding chamber, and the matrix resin is molded into a shape along the molding surface by expansion of the bag-like body. It can be supplied and impregnated, and the resin can be cured.

  According to a seventh aspect of the present invention, in the internal pressure molding apparatus according to any one of the first to sixth aspects, a bag-shaped body made of an elastomer resin is used as the bag-shaped body.

  According to the seventh aspect of the present invention, when the bag-like body is inflated by supplying pressurized air, the bag-like body can be elastically deformed into a shape along the concave portion of the mold, and the bag is inflated. It is possible to prevent a slack portion from occurring in the body.

  Accordingly, it is possible to prevent wrinkles having a shape corresponding to the sagging portion of the bag-like body from occurring inside the molded product, to make the inside of the molded product a smooth shape, and to keep the thickness of the molded product constant. it can. Also, by discharging compressed air, the bag-like body can be shrunk and elastically deformed and urged in the direction of peeling from the hollow part of the fiber reinforced resin hollow part. Can be removed.

  According to the present invention, the bag-like body can be easily attached to the mold by attaching the closing member, and the bag-like body can be easily detached from the mold by removing the closing member. Can be easily attached and detached, and the replacement work of the bag-like body can be easily performed. In addition, since the bag-shaped body can be positioned with respect to the mold by attaching the closing member to the mold, the bag-shaped body can be positioned at a regular position within the hollow portion of the molding material, and the uniform internal pressure can be applied to the entire molding material. Therefore, uneven thickness can be prevented from occurring in the molded product.

[First Embodiment]
Hereinafter, a first embodiment to which an internal pressure molding apparatus 1 of the present invention is applied will be described. 1 is an overall configuration diagram of an internal pressure molding apparatus 1 according to the first embodiment, FIG. 2 is a configuration diagram of molding dies 2 and 3 according to the first embodiment, and FIG. 3 is a partial configuration diagram of the internal pressure molding apparatus 1. It is.

  The internal pressure molding apparatus 1 is for molding a prepreg w1 as a molding material by an internal pressure molding method to obtain a fiber-reinforced resin hollow part as a molded product having a desired shape. The prepreg w1 is an intermediate molding material in which a reinforcing fiber such as carbon fiber is knitted into a sheet shape and impregnated with a thermosetting resin such as an epoxy resin that is a matrix resin to be in a semi-cured state.

  As shown in FIGS. 1 and 2, the internal pressure molding apparatus 1 includes an upper mold 2 </ b> A and a lower mold 2 </ b> B that are a plurality of molding dies 2. The upper mold 2A and the lower mold 2B are opposed to each other vertically, and are clamped (see FIG. 1) in which the mating surfaces are brought into close contact with each other by mold clamping means (not shown). The mold can be opened (see FIG. 2) separated from each other in the vertical direction.

  The molding surfaces 3a and 3b of the upper mold 2A and the lower mold 2B have shapes corresponding to the outer surface shapes of the fiber reinforced resin hollow parts, and form the molding chamber 3 (see FIG. 1) by clamping. The upper mold 2A and the lower mold 2B include a communication passage 4 that communicates between the interior and the exterior of the molding chamber 3 by clamping, and a mounting groove for removably attaching a closing member described later to the communication passage 4. 5 (see FIG. 2). The communication path 4 is opened with a predetermined opening area between the outside of the molds 2A and 2B and the molding chamber 3, and the mounting groove 5 is circumferential along the inner peripheral surface of the communication path 4 in a clamped state. It is continuous.

  The closing member 6 is detachably attached to the mold 2 in the mold open state, and has a configuration that closes the communication path 4 by clamping. In the present embodiment, the closing member 6 has a flat plate shape that is large enough to close the communication passage 4, and the outer peripheral edge portion is fitted into the attachment groove 5 and attached as shown in FIG. 1. And when the bag-like body 10 is inflated, the bag-like body 10 has such rigidity that it can be confined in the molding chamber 3. A sealing member S that seals between the molding chamber 3 and the communication path 4 is interposed between the outer peripheral edge of the closing member 6 and the mounting groove 5 (see FIG. 1).

  A bag-like body 10 is disposed in the molding chamber 3. The bag-like body 10 plays a role of transmitting the pressure applied to the inside of the bag-like body 10 during molding to the prepreg w1 laid on the molding surfaces 3a and 3b, and is elastic and deformed. Is made of an elastomer resin material such as silicon rubber, fluorine rubber, acrylic rubber, or butyl rubber. The bag-like body 10 expands due to the inflow of pressurized air, elastically deforms along the molding surfaces 3a and 3b of the molding chamber 3, and presses the prepreg w1 against the molding surfaces 3a and 3b of the molding chamber 3 for shaping. .

  The bag-like body 10 is provided with an air valve 11. The air valve 11 has a round rod-shaped shaft portion 11a and a disk-shaped flange 11b whose diameter is enlarged at the proximal end of the shaft portion 11a, and extends along the axial direction to penetrate the shaft portion 11a and the flange portion 11b. An air passage 11c is formed.

  As shown in FIGS. 1 and 3, the air valve 11 is configured so that the flange portion 11 b is disposed inside the bag-like body 10 and the shaft portion 11 a is inserted through the opening 10 a of the bag-like body 10. It is attached to the valve attachment part 7. The valve mounting portion 7 has a mounting hole 7 a (see FIG. 3) drilled at a substantially central position of the closing member 6, and the shaft portion 11 a of the air valve 11 is attached to the mounting hole 7 a from the inside of the molding chamber 3. The air valve 11 is attached by screwing the lock nut 8 into the shaft portion 11a protruding from the attachment hole 7a to the outdoor side.

  The air valve 11 is attached to the valve mounting portion 7 so that the periphery of the opening 10a of the bag-like body 10 is sandwiched between the flange portion 11b and the closing member 6, and the bag-like body 10 is integrally attached to the closing member 6. Pressurized air can be flowed into the bag-like body 10 from the outside of the molding chamber 3 through the air passage 11 c, and the pressurized air can be let out from the inside of the bag-like body 10.

  A pressure hose 12 for supplying pressurized air is connected to the tip of the shaft portion 11 a of the air valve 11. A connection coupler 13 is interposed between the pressure hose 12 and the air valve 11 so that the pressure hose 12 and the air valve 11 can be easily connected and disconnected.

  Further, the internal pressure molding apparatus 1 having the above configuration is provided with a heating means 14 for heating the molding surfaces 3a and 3b of the mold 2 and a vacuuming means 15 for evacuating the interior of the molding chamber 3. Yes.

  As shown in FIGS. 1 and 2, the heating means 14 has a medium passage 14a formed in the vicinity of each molding surface 3a, 3b of the molding die 2, and is connected to the medium passage 14a. The molding surfaces 3a and 3b are heated by flowing a heating medium such as oil or water from a medium supply device (not shown) so that the matrix resin of the prepreg w1 can be cured in the chamber of the molding chamber 3. It has become. The medium passage 14a is formed along the molding surfaces 3a and 3b so that the matrix resin of the prepreg w1 can be effectively cured.

  In the present embodiment, as a specific example of the heating means 14, the case where the heat medium flows through the medium passage 14a has been described as an example. However, the heating means 14 is provided in at least one of the upper mold 2A and the lower mold 2B. For example, an electric heater may be provided in place of the medium passage 14a and the molding surfaces 3a and 3b may be heated by energization.

  As shown in FIG. 1, the vacuuming means 15 has a vacuum passage 15 a having one end opened on the molding surfaces 3 a and 3 b of the mold 2 and the other end connected to the vacuum pump P. The interior of the molding chamber 3 can be evacuated by driving.

  Next, an internal pressure molding method using the internal pressure molding apparatus 1 having the above configuration will be described. First, the air valve 11 is attached to the valve mounting portion 7 of the closing member 6, the periphery of the opening 10 a of the bag-like body 10 is sandwiched between the valve mounting portion 7 and the air valve 11, and the bag-like body 10 is integrated with the closing member. Work to attach to the in advance.

  Then, the mold 2 is opened, the prepreg w1 is laid on the molding surfaces 3a and 3b of the mold 2, and the bag-like body 10 is inserted and arranged between the prepregs w1 to attach the closing member 6 to the mold 2.

  After the mold 2 is clamped and the communication passage 4 is closed with the closing member 6, the bag-like body 10 is inflated by supplying pressurized air from the pressure hose 12, and the vacuum pump P of the vacuuming means 15 is turned on. The vacuum chamber is driven to evacuate the molding chamber 3 to bring the prepreg w1 into close contact with the molding surfaces 3a and 3b.

  Then, with the prepreg w1 in close contact with the molding surfaces 3a and 3b, the heating surfaces 14 heat the molding surfaces 3a and 3b, and the prepreg w1 is heated by the heat of the molding surfaces 3a and 3b to be completely cured. Then, a fiber-reinforced resin hollow part having a shape corresponding to the molding surfaces 3a and 3b is molded.

  After molding, the supply of pressurized air and evacuation are stopped, and the pressurized air inside the bag-like body 10 is caused to flow out of the air passage 11c of the air valve 11 to shrink the bag-like body 10. Then, the mold 2 is opened, the closing member 6 is removed, the bag-like body 10 is taken out from the hollow part of the fiber reinforced resin hollow part, and the fiber reinforced resin hollow part is removed from the mold 2.

  According to the internal pressure molding apparatus 1 having the above configuration, the bag-like body 10 can be easily attached to the molding die 2 by attaching the closing member 6, and the bag-like body 10 can be removed from the molding die 2 by removing the closing member 6. Can be easily removed. Therefore, the bag-like body 10 can be easily attached and detached, and the attachment work and the exchange work of the bag-like body 10 can be easily performed.

  Thereby, for example, the closing member 6 can be attached to the molding die 2 after the prepreg w1 is disposed in the molding chamber 3, and when the prepreg w1 is disposed in the molding chamber 3, the closure member 6 or the bag-like body is provided. 10 does not get in the way, and the work of placing the prepreg w1 on the mold 3 can be facilitated. Further, when removing the fiber reinforced resin hollow part formed by molding the prepreg w1 from the mold 3, the closing member 6 can be detached from the mold 2 together with the fiber reinforced resin hollow part, so that the demolding work is easy. Can be

  Further, by attaching the closing member 6 to the mold 2, the bag-like body 10 can be accurately positioned with respect to the mold 2. Therefore, the bag-like body 10 can be positioned at a normal position in the prepreg w1, a uniform internal pressure can be applied to the entire prepreg w1, and the thickness of the fiber-reinforced resin hollow part after molding can be made substantially equal. And the occurrence of uneven thickness can be prevented.

  And the bag-like body 10 can be removed from the air valve 11 by removing the air valve 11 from the valve mounting portion 7. Therefore, for example, the bag-like body 10 can be exchanged according to the size and shape of the molding chamber 3, or when the bag-like body 10 is deteriorated, it can be exchanged for a new bag-like body 10.

  Further, in the internal pressure molding apparatus 1, in addition to the expansion of the bag-like body 10 by pressurized air, the interior of the molding chamber 3 is evacuated, so the outer surface of the prepreg w 1 and the molding surface 3 a of the molding chamber 3. 3b can be discharged. Therefore, compared with the case of the bag-like body 10 alone, it is possible to further improve the degree of adhesion in which the outer surface of the prepreg w1 is in close contact with the molding surfaces 3a and 3b of the molding chamber 3, and the prepreg w1 is molded into the molding surfaces 3a and 3b. It is possible to reliably shape the shape along.

  And since the heating means 14 is provided in the shaping | molding die 2, it can heat in the position closer to the prepreg w1 arrange | positioned in the shaping | molding chamber 3. FIG. Therefore, for example, compared with the case where the whole mold is heated by a heating furnace, the prepreg w1 can be effectively heated, and energy saving can be achieved.

  Since the bag-like body 10 is made of an elastomer resin, when the bag-like body 10 is inflated by supplying pressurized air, the bag-like body 10 can be inflated like a rubber balloon. It can be elastically deformed into a shape along 3a and 3b, and a slack portion can be prevented from occurring in the bag-like body 10 during expansion.

  Accordingly, it is possible to prevent wrinkles having a shape corresponding to the slack portion of the bag-like body 10 inside the hollow fiber-reinforced resin part after molding, to make the inside smooth, and to make the overall thickness almost equal. can do.

  In addition, the elastomer resin can be easily peeled by urging it in the direction of peeling from the hollow part of the fiber-reinforced resin hollow part when the compressed air is discharged and the bag-like body 10 is contracted. Therefore, the bag-like body 10 can be taken out from the hollow portion of the fiber-reinforced resin hollow part without being damaged, and can be reused any number of times.

  In the first embodiment, the case where the vacuum chamber 15 is evacuated by the vacuum chamber 15 has been described as an example. However, the vacuum chamber 15 is not an essential component, and the prepreg w1 has a bag shape. The vacuuming means 15 may be omitted as long as the body 10 is sufficiently adhered to the molding surfaces 3a and 3b by the expansion of the body 10.

  In the above-described embodiment, the case of the prepreg w1 has been described as an example of the intermediate molding material. However, the present invention is not limited to this. For example, a reinforced fiber not impregnated with a matrix resin instead of the prepreg w1. Is placed in the molding chamber as an intermediate molding material, and the matrix resin is supplied and impregnated into the molding chamber 3 in a state in which the bag-like body 10 is in close contact with the molding surfaces 3a and 3b by the expansion of the bag 10 Alternatively, the resin may be cured by heating by the heating means 14.

  FIG. 4 illustrates a case where the fiber reinforced resin hollow part is molded by arranging the reinforcing fiber w2 not impregnated with the matrix resin in the molding chamber 3 as an intermediate molded body. The molding die 2 is provided with a resin injection port 16 so that matrix resin can be supplied from the resin tank 17 into the molding chamber 3. Other configurations are the same as the configuration of the internal pressure molding apparatus 1 shown in FIG. 1, and the same components are denoted by the same reference numerals, and detailed description thereof is omitted.

  In molding, the bag-like body 10 is inserted into the hollow portion of the intermediate molding material and placed in the molding chamber 3, and after the mold is clamped, pressurized air is supplied from the pressure hose 12 to expand the bag-like body 10. Then, the vacuum pump P of the evacuating means 15 is driven to evacuate the molding chamber 3 to bring the reinforcing fibers w2 into close contact with the molding surfaces 3a and 3b.

  Then, the matrix resin in the resin tank 17 is supplied from the resin injection port 16 into the molding chamber 3 while the reinforcing fibers w2 are in close contact with the molding surfaces 3a and 3b, and the reinforcing fibers are impregnated. When a sufficient amount of resin is supplied, the resin injection port 16 is closed. Subsequent procedures such as heating the molding surfaces 3a and 3b by the heating means 14 after the resin supply is completed are the same as the molding procedure described with reference to FIG. Also by this molding method, the bag-like body 10 can be easily attached and detached, and the attachment work and the exchange work of the bag-like body 10 can be easily performed. Moreover, the bag-like body 10 can be positioned at a regular position in the hollow portion of the prepreg w1, and a fiber-reinforced resin hollow part having a substantially equal thickness as a whole can be obtained.

[Second Embodiment]
FIG. 5 is an overall configuration diagram of the internal pressure molding apparatus 1 according to the second embodiment. The same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 5, the molding die 2 forms a non-molding chamber 21 that is sealed from the outside by clamping. The non-molding chamber 21 is formed outside the molding chamber 3 and communicates with the interior of the molding chamber 3 through the communication path 4. A pressure hose 12 is provided in the non-molding chamber 21 and is connected to the air valve 11 via a connection coupler 13.

  The inside of the non-molding chamber 21 is evacuated by the evacuation means 18. The vacuuming means 18 has a vacuum passage 18a having one end opened in the non-molding chamber 21 and the other end connected to a vacuum pump (not shown), and evacuates the non-molding chamber 21, The molding chamber 3 can be indirectly evacuated through the connection path 4 and the closing member 6.

  In molding, the bag-like body 10 is inserted into the hollow portion of the prepreg w1 and placed in the molding chamber 3, and after the mold is clamped, pressurized air is supplied from the pressure hose 12 to expand the bag-like body 10, The vacuum pump of the vacuuming means 18 is driven to evacuate the non-molding chamber 21, and the molding chamber 3 is indirectly evacuated through the connecting path 4 and the closing member 6 to mold the prepreg w1. The surfaces 3a and 3b are closely attached. And the subsequent procedures such as heating by the heating means 14 are the same as the molding procedure explained in FIG. 1 in the first embodiment, and the explanation is omitted.

  According to the present embodiment, the interior of the non-molding chamber 21 is evacuated and the interior of the molding chamber 3 is indirectly evacuated through the space between the communication passage 4 and the closing member 6. The uncured resin of the prepreg w1 can be sealed with the member 6. Accordingly, it is possible to prevent the uncured resin of the prepreg w1 from being sucked out of the molding chamber 3 by the vacuuming of the vacuuming means 15. Therefore, the thickness of the fiber-reinforced resin hollow part can be made constant between the parts, and a high-quality fiber-reinforced resin hollow part can be provided.

  Moreover, the operation | work which connects and disconnects the connection coupler 13 of the pressurization hose 12 to the air valve 11 can be performed in the non-molding chamber 21, and the non-molding chamber 21 can be used as a work space.

  When the connection coupler 13 is disconnected from the air valve 11 and the air passage 11c of the air valve 11 is opened in the non-molding chamber 21, the air in the bag-like body 10 can be sucked out by the vacuuming means 18, and the bag-like body 10 Can be quickly and strongly contracted. Therefore, the bag-like body 10 attached to the hollow portion of the fiber-reinforced resin hollow part can be easily detached by peeling off with a strong force.

  In the above-described second embodiment, the case of the prepreg w1 has been described as an example of the intermediate molding material. However, the present invention is not limited to this example. For example, the reinforcement is not impregnated with a matrix resin instead of the prepreg w1. The fiber w2 is placed in the molding chamber 3 as an intermediate molding material, and the matrix resin is supplied into the molding chamber 3 and impregnated in a state of being in close contact with the molding surfaces 3a and 3b by the expansion of the bag-like body 10. It is good also as a structure which makes it heat by the heating means 14 after that, and hardens resin.

BRIEF DESCRIPTION OF THE DRAWINGS The whole block diagram of the internal pressure molding apparatus in 1st Embodiment. The block diagram of the shaping | molding die in 1st Embodiment. The partial block diagram of an internal pressure molding apparatus. The whole block diagram explaining the other Example of an internal-pressure shaping | molding apparatus. The whole block diagram of the internal pressure molding apparatus in 2nd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Internal pressure molding apparatus 2 Mold 2A Upper mold 2B Lower mold 3 Molding chamber 3a, 3b Molding surface 4 Communication path 6 Closing member 7 Valve attachment part 10 Bag-shaped body 11 Air valve 11c Air path 14 Heating means 15 Vacuum pulling means 18 Vacuum Pulling means 21 Non-molding chamber w1 Prepreg (molding material)
w2 Reinforcing fiber

Claims (7)

In an internal pressure molding apparatus that molds a molding material by inflating the bag-like body by flowing pressurized air into the bag-like body in a molding chamber formed by clamping a plurality of molding dies,
A communication path formed by clamping and communicating between the interior and exterior of the molding chamber;
An air valve provided in the bag-like body and having an air passage communicating with the inside of the bag-like body;
A closing member that is detachably attached to at least one of the plurality of molds and closes the communication path by clamping the mold;
A valve mounting portion provided on the closing member, to which the air valve is mounted so that pressurized air can flow into the bag-like body from the outside of the molding chamber through the air passage of the air valve. An internal pressure molding device characterized by   The air valve is detachably provided on the bag-like body, and has a configuration in which an opening peripheral edge of the bag-like body is sandwiched between the valve attachment portion and the valve attachment portion. The internal pressure molding apparatus according to claim 1.   The internal pressure molding apparatus according to claim 1, further comprising a vacuum evacuation unit that evacuates the interior of the molding chamber. A non-molding chamber formed outside the molding chamber by the mold clamping and communicating with the chamber of the molding chamber through the communication path;
A pressurized air supply unit disposed in the non-molding chamber and connected to and disconnected from the air valve and supplying pressurized air in a connected state;
The said vacuuming means evacuates the interior of the non-molding chamber, and indirectly evacuates the interior of the molding chamber through the communication path and the closing member. Internal pressure forming device.   5. The internal pressure molding apparatus according to claim 1, wherein heating means for heating a molding surface of the molding chamber is provided in at least one of the plurality of molding dies.   The internal pressure molding apparatus according to any one of claims 1 to 5, further comprising means for supplying a matrix resin into the molding chamber.   The internal pressure molding apparatus according to any one of claims 1 to 6, wherein a bag-shaped body made of an elastomer resin is used as the bag-shaped body.

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