JP2015217532A - Device and method for removing dry spot - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device and method for reliably removing dry spots occurring during resin impregnation in VaRTM molding without the fear of causing molding defects.SOLUTION: The device includes: a cylindrical device body 11; an end part 13a of an exhaust tube 13 disposed movable in the axial direction in a hollow part of the device body 11; a lock mechanism which restricts the movement of the end part 13a of the exhaust tube 13; a vacuum pump 9 which evacuates the hollow part of the device body 11 with the movement of the end part 13a of the exhaust tube 13 restricted by the lock mechanism, so that the edge of the device body 11 comes in close contact with a vacuum bag film 5 at the place where a dry spot DS occurs or in the vicinity thereof; and a blade part 17 which moves together with the end part 13a of the exhaust tube 13 to penetrate through the vacuum bag film 5 for exhaustion of the gas in the dry spot DS, with release of the movement restriction by the lock mechanism in a state that the end part of the device body 11 is closely contacted with the vacuum bag film 5.

Description

  The present invention relates to a dry spot removing apparatus and a dry spot removing method for removing dry spots generated during VaRTM (Vacuum Assisted Resin Transfer Molding) molding.

  The VaRTM molding described above is a molding method used for molding FRP parts for ships, aircrafts, and vehicles, for example, and the inside of the film is evacuated while the fiber sheet laminate placed on the mold is wrapped with the film. This is a molding method in which the resin poured between the film and the fiber sheet laminate is impregnated into the fiber sheet laminate and cured.

  In this VaRTM molding, a resin-unimpregnated site unique to this molding method called a dry spot (void) may occur. Conventionally, as a removal device for removing this dry spot, for example, Patent Document 1 describes it. There is something.

  This dry spot removing device has a cylindrical device main body, a joint portion formed integrally with the device main body, and a suction portion connected to the joint portion via a suction tube. In the removal device, when a dry spot is detected during resin impregnation of the fiber sheet laminate, a hole is formed in the film at or near the place where the dry spot is generated, and then the end of the device body is closely attached to the hole. Thus, the gas of the dry spot is exhausted by the suction part through the joint part and the suction pipe.

Patent 5374519

  However, in the conventional dry spot removing apparatus described above, when a dry spot is detected during resin impregnation, a hole is formed in the film at or near the dry spot occurrence position, and then the end of the apparatus main body is brought into close contact with the hole. In other words, since the hole is made without forming a vacuum environment on the film, there is a possibility that air may enter the film in this perforation process, resulting in poor molding. There is a problem that it occurs, and it has been a conventional problem to solve this problem.

  The present invention has been made paying attention to the above-described conventional problems, and there is no fear of forming defects, and a dry spot removing apparatus and a dry spot that can reliably remove a dry spot generated during resin impregnation. It aims to provide a removal method.

  In the first aspect of the present invention, a resin is interposed between the film and the fiber sheet laminate by evacuating the inside of the film in a state where the fiber sheet laminate placed on the mold is wrapped with the film. Is a dry spot removal device that removes dry spots generated during VaRTM molding by impregnating the fiber sheet laminate with the resin, and moves in the axial direction to a cylindrical device body and a hollow portion of the device body A movable body that can be arranged, a lock mechanism that restricts movement of the movable body in the hollow portion of the apparatus main body, and a hollow portion of the apparatus main body in a state where movement of the movable body is restricted by the lock mechanism. An evacuation means for bringing the end of the apparatus main body into close contact with the film at or near the dry spot generation site by evacuating; When the part is evacuated and the end of the apparatus main body is in close contact with the film, the movement restriction by the locking mechanism is released to move integrally with the moving body, penetrate the film, and pass through the film. A penetrating means for exhausting gas is provided.

  Further, in the second aspect of the present invention, the moving body is an end of an exhaust tube that communicates the hollow portion of the apparatus main body with the exhaust means, and the penetrating means is provided at an end of the exhaust tube. In the third aspect of the present invention, the movable body is a movable cylindrical body fixed to an end of an exhaust tube that communicates the hollow portion of the apparatus main body and the exhaust means. The penetrating means is arranged at either the moving cylinder or the end of the exhaust tube.

  On the other hand, in the dry spot removal method according to the present invention, the film and the fiber sheet laminate are evacuated by evacuating the film while the fiber sheet laminate placed on the mold is wrapped in the film. A dry spot removal method for removing a dry spot generated during VaRTM molding by pouring a resin in between and impregnating the fiber sheet laminate with the resin, wherein a vacuum environment is formed on the film at or near the dry spot occurrence position. After the formation, the film is configured to evacuate the gas in the dry spot by making a through hole in the film while maintaining a vacuum environment on the film.

In the dry spot removing apparatus according to the present invention, it is desirable that the end of the apparatus main body is in close contact with the film immediately above the dry spot occurrence location, but the position directly above the dry spot occurrence location is narrower than the end of the apparatus main body. If it is on the ridge line or on the protrusion, the end of the apparatus main body may be brought into close contact with the vicinity of the dry spot occurrence location.
At this time, the range in which the gas in the dry spot can be exhausted by the exhaust means and the surrounding resin can be drawn and filled in the dry spot is defined as the vicinity of the dry spot generation location.

  In the dry spot removing apparatus according to the present invention, when a dry spot occurs during resin impregnation during VaRTM molding, the end of the apparatus main body is set at or near the dry spot occurrence position, and the apparatus is attached by an adhesive means such as a seal tape. Adhere the end of the body to the film. At this time, the movable body is fixed at a predetermined standby position in the hollow portion of the apparatus main body by the lock mechanism.

  Next, the hollow portion of the apparatus body is evacuated by the exhaust means to form a vacuum environment on the film at or near the dry spot occurrence position, and then the movement mechanism by the lock mechanism is released to make the penetrating means a moving body. When moved integrally, the penetrating means penetrates the film and the gas in the dry spot is exhausted from the hole of the film formed thereby, and the surrounding resin is drawn into the dry spot and the dry spot is removed. It becomes.

  Since the vacuum state of the hollow portion of the apparatus main body is maintained during the perforation, that is, a vacuum environment is formed on the film, air is introduced into the film from the hole of the film formed by the penetrating means. Intrusion is avoided, and as a result, the concern that molding defects will occur is wiped out.

  Further, in the dry spot removing apparatus according to the present invention, the end of the exhaust tube that communicates the hollow portion of the apparatus main body with the exhaust means is a moving body, and the penetrating means is disposed at the end of the exhaust tube. Thus, the apparatus main body can be downsized, and the end of the apparatus main body can be easily arranged immediately above the dry spot occurrence location.

  Furthermore, in the dry spot removing apparatus according to the present invention, the moving cylinder fixed to the end of the exhaust tube is used as a moving body, and the penetrating means is arranged at either the end of the moving cylinder or the exhaust tube. And the structure of a lock mechanism will be facilitated by utilizing a movable cylinder.

  The dry spot removing apparatus according to the present invention brings about a very excellent effect that it is possible to reliably remove dry spots generated during resin impregnation after eliminating concerns that new molding defects will occur. .

It is a section explanatory view of the FRP component manufacturing device showing the situation where the dry spot is removed by the dry spot removing device according to one embodiment of the present invention. It is a disassembled perspective explanatory drawing of the dry spot removal apparatus of FIG. It is sectional explanatory drawing (a) which shows the condition before the operation | movement of the dry spot removal apparatus of FIG. 1, and sectional explanatory drawing (b) which shows the condition in operation. FIG. 6 is an exploded perspective view of a dry spot removing apparatus according to another embodiment of the present invention. They are sectional explanatory drawing (a) which shows the condition before the operation | movement of the dry spot removal apparatus of FIG. 4, and sectional explanatory drawing (b) which shows the condition in operation | movement.

Embodiments of the present invention will be described below with reference to the drawings.
1 to 3 show a dry spot removing apparatus according to an embodiment of the present invention.

  As shown in FIG. 1, an FRP component manufacturing apparatus 1 in which a dry spot removing apparatus 10 for removing dry spots generated during VaRTM molding is used is a molding die 2 (actually, in most cases, it has a complicated shape, but for simplicity. And a net-like resin fluid medium 4 that wraps the fiber sheet laminate W placed on the mold 2 and a vacuum bag film 5 that wraps the fiber sheet laminate W together with the resin fluid medium 4. A release sheet 3 is provided between the fiber sheet laminate W and the mesh-like resin fluidized medium 4 for facilitating the peeling of the resin fluidized medium 4 from the fiber sheet laminate W after molding. It is.

  The vacuum bag film 5 of the FRP component manufacturing apparatus 1 is provided with a resin injection port 5a and an exhaust port 5b, and the resin P in the tank 6 is supplied to the resin injection port 5a through a valve 7 as a vacuum bag film. An injection tube 6a to be supplied to the inside of the tank 5 is connected, while the exhaust port 5b is connected to the drain tank 8 and the vacuum pump 9 through the exhaust tube 8b.

  In this FRP component manufacturing apparatus 1, the fiber sheet laminate W placed on the mold 2 is wrapped in the vacuum bag film 5, and in this state, the vacuum pump 9 is operated to evacuate the vacuum bag film 5. 1, while the gas in the vacuum bag film 5 is exhausted as indicated by the broken line arrow, the resin between the vacuum bag film 5 and the fiber sheet laminate W as indicated by the solid line arrow in FIG. 1. The resin P is poured into the fluid medium 4 and impregnated into the fiber sheet laminate W to be cured.

  As shown in FIG. 2, the dry spot removing device 10 for removing the dry spots generated during the VaRTM molding has a cylindrical device main body 11 and a fitting arrangement in which a hollow portion of the device main body 11 is movable in the axial direction. One end (moving body) 13a of the exhaust tube 13 thus formed, a lock mechanism for restricting the movement of the one end 13a of the exhaust tube 13 in the hollow portion of the apparatus body 11, and the one end 13a of the exhaust tube 13 by this lock mechanism An evacuation unit that evacuates the hollow portion of the apparatus main body 11 in a state where the movement is restricted, thereby bringing the end of the apparatus main body 11 into close contact with the vacuum bag film 5 immediately above the location where the dry spot DS is generated; The blade portion (penetrating means) 17 is provided on the end face of the one end portion 13a.

  In this case, the other end 13b of the exhaust tube 13 is connected to the drain tank 8 of the FRP component manufacturing apparatus 1, and the vacuum pump 9 of the FRP component manufacturing apparatus 1 is used as an exhaust means for evacuating the hollow portion of the apparatus main body 11. Is used.

  The lock mechanism for restricting the movement of the one end portion 13a of the exhaust tube 13 in the hollow portion of the apparatus main body 11 includes a pressing ring 14 disposed in an annular groove 11a formed in the inner peripheral edge at the tip of the apparatus main body 11, and the apparatus. A lid 16 is provided which is disposed at the tip of the main body 11 and fixed by screwing a screw 15 into a screw hole 11b formed at the tip.

  In this lock mechanism, as shown in FIG. 3 (a), the screw 15 is tightened to fix the lid 16 to the tip of the apparatus main body 11, whereby the pressure ring 14 which is deformed in the annular groove 11a is thereby removed from the exhaust tube. 13 is pressed against one end portion 13a of the apparatus main body 11 to restrict the movement in the hollow portion of the apparatus main body 11, while the screw 15 is loosened to lift the lid 16 from the front end of the apparatus main body 11 as shown in FIG. Thus, the pressing state of the pressing ring 14 against the one end portion 13a of the exhaust tube 13 is relaxed, and the movement restriction of the one end portion 13a of the exhaust tube 13 is released.

  That is, in this dry spot removing device 10, the end of the exhaust tube 13 is released by releasing the movement restriction by the lock mechanism in a state where the hollow portion of the device main body 11 is evacuated and the end thereof is in close contact with the vacuum bag film 5. The blade portion 17 is moved integrally with the portion 13a to penetrate the vacuum bag film 5, and the gas in the dry spot DS is exhausted from the hole H of the vacuum bag film 5 formed thereby. In addition, the code | symbol 18 in FIG. 3 is a sealing tape.

  In this dry spot removing apparatus 10, when a dry spot DS is generated during resin impregnation during VaRTM molding, the end of the apparatus main body 11 is set at a position where the dry spot DS is generated (or in the vicinity thereof), and a seal tape 18 is used. The end of the apparatus main body 11 is brought into close contact with the vacuum bag film 5.

  At this time, by tightening the screw 15 of the locking mechanism and fixing the lid 16 to the tip of the apparatus main body 11, the pressing ring 14 deformed in the annular groove 11a is pressed against the one end 13a of the exhaust tube 13, and the apparatus main body The movement of the one end 13a of the exhaust tube 13 in the hollow portion 11 is restricted and fixed at a predetermined standby position.

  Next, by operating the vacuum pump 9 in this state and evacuating the hollow portion of the apparatus main body 11, a vacuum environment is formed on the vacuum bag film 5 at the location where the dry spot DS is generated (or in the vicinity thereof) By loosening the screw 15 of the locking mechanism and lifting the lid 16 from the tip of the apparatus body 11, the pressing state of the pressing ring 14 against the one end 13 a of the exhaust tube 13 is relaxed, and the movement of the one end 13 a of the exhaust tube 13 is performed. When the restriction is released and the blade portion 17 is moved integrally, the blade portion 17 penetrates the vacuum bag film 5 and the gas in the dry spot DS is exhausted from the hole H formed thereby, and the dry spot DS enters the dry spot DS. The surrounding resin P is drawn in and the dry spot DS is removed.

  Since the vacuum state of the hollow portion of the apparatus main body 11 is maintained while the hole H is opened, that is, a vacuum environment is formed on the vacuum bag film 5, the vacuum bag film formed by the blade portion 17. As a result, it is avoided that air enters the vacuum bag film 5 from the hole H of the hole 5, and as a result, a concern that a new molding defect may occur is wiped out.

  Further, in the dry spot removing apparatus 10 according to this embodiment, one end portion 13a of the exhaust tube 13 communicating the hollow portion of the apparatus main body 11 and the vacuum pump 9 is used as a moving body, and a blade is attached to the one end portion 13a of the exhaust tube 13. Since the portion 17 is arranged, the apparatus main body 11 can be reduced in size, and the apparatus main body 11 can be easily arranged immediately above the location where the dry spot DS is generated.

  4 and 5 show a dry spot removing apparatus according to another embodiment of the present invention. As shown in FIG. 4, in the dry spot removing apparatus 20 according to this embodiment, one end 13a of the exhaust tube 13 is attached to one end 13a. The fixed moving cylinder 22 is used as a moving body, and the blade portion 17 is disposed at one end portion 13 a of the exhaust tube 13.

  In addition, the lock mechanism of the dry spot removing device 20 according to this embodiment includes a radial pin hole 22b formed in the outer peripheral wall of the movable cylinder 22, and a pin 25 that is detachably fitted into the pin hole 22b. In this locking mechanism, as shown in FIG. 5A, the pin 25 fitted in the pin hole 22 b of the movable cylinder 22 is hooked on the tip of the apparatus main body 21. The movement of the one end portion 13a of the exhaust tube 13 and the movable cylinder 22 is restricted. On the other hand, as shown in FIG. 5B, the one end portion 13a of the exhaust tube 13 and the pin 25 are removed from the pin hole 22b. The movement restriction of the movable cylinder 22 is released. 4 and 5, reference numeral 22a denotes an annular groove formed in the outer peripheral wall of the apparatus main body 21, and reference numeral 24 denotes an O-ring fitted in the annular groove 22a.

  In the dry spot removing apparatus 20 according to this embodiment, when a dry spot DS is generated during resin impregnation during VaRTM molding, the end of the apparatus main body 21 is set at a position where the dry spot DS is generated (or in the vicinity thereof), and a seal is formed. The end of the apparatus main body 21 is brought into close contact with the vacuum bag film 5 with the tape 18.

  At this time, the pin 25 fitted in the pin hole 22 b of the movable cylinder 22 of the lock mechanism is hooked on the tip of the apparatus main body 21, whereby one end 13 a of the exhaust tube 13 and the movable cylinder 22 in the hollow portion of the apparatus main body 21. Is restricted to a predetermined standby position.

  Next, by operating the vacuum pump 9 in this state and evacuating the hollow portion of the apparatus main body 21, a vacuum environment is formed on the vacuum bag film 5 at the location (or the vicinity thereof) where the dry spot DS is generated, When the pin 25 is removed from the pin hole 22b of the locking mechanism, the movement of the one end portion 13a of the exhaust tube 13 and the movable cylinder 22 is released, and the blade portion 17 is moved integrally. The gas in the dry spot DS is exhausted from the hole H formed by penetrating the film 5, and the surrounding resin P is drawn into the dry spot DS to remove the dry spot DS.

  Since the vacuum state of the hollow portion of the apparatus main body 21 is maintained while the hole H is opened, that is, a vacuum environment is formed on the vacuum bag film 5, the vacuum bag formed by the blade portion 17. It is avoided that air enters the vacuum bag film 5 from the hole H of the film 5, and as a result, the concern that a molding defect will occur is wiped out.

  Further, in the dry spot removing device 20 according to this embodiment, the moving cylinder 22 fixed to the one end portion 13a of the exhaust tube 13 is used as a moving body, and the blade portion 17 is disposed at the one end portion 13a of the exhaust tube 13. As described above, a lock mechanism using the movable cylinder 22 can be constructed. That is, only by attaching and detaching the pin 25 to and from the pin hole 22b formed in the movable cylinder 22, the movement restriction and release of the one end 13a of the exhaust tube 13 and the movable cylinder 22 can be performed.

  The configurations of the dry spot removing apparatus and the dry spot removing method according to the present invention are not limited to the above-described embodiments, and other configurations such as a configuration using a needle as the penetrating means are possible. is there.

2 Mold 5 Vacuum bag film (film)
9 Vacuum pump (exhaust means)
10, 20 Dry spot removing device 11, 21 Device body 11b Screw hole (lock mechanism)
13 Exhaust tube 13a One end of the exhaust tube (moving body)
14 Press ring (lock mechanism)
15 Screw (lock mechanism)
16 Lid (locking mechanism)
17 Blade (penetration means)
22 Moving cylinder (moving body)
22b Pin hole (locking mechanism)
25 pin (lock mechanism)
DS Dry spot H hole (through hole)
P resin W fiber sheet laminate

Claims (4)

The inside of the film is evacuated in a state where the fiber sheet laminated body placed on the mold is wrapped with a film, so that a resin is poured between the film and the fiber sheet laminated body, and the resin is added to the fiber sheet. A dry spot removing device that removes dry spots generated during VaRTM molding impregnated in a laminate,
A cylindrical device body,
A movable body arranged to be movable in the axial direction in the hollow portion of the apparatus body;
A lock mechanism for restricting movement of the movable body in the hollow portion of the apparatus body;
An evacuation unit that causes the hollow portion of the apparatus main body to be evacuated to closely contact the end of the apparatus main body with the film at or near the dry spot occurrence position in a state where the movement of the moving body is restricted by the lock mechanism When,
When the hollow portion of the apparatus main body is evacuated and the end of the apparatus main body is in close contact with the film, the movement restriction by the lock mechanism is released to move integrally with the moving body and penetrate the film. The dry spot removal apparatus provided with the penetration means which exhausts the gas in the said dry spot.   The dry body according to claim 1, wherein the moving body is an end portion of an exhaust tube that communicates the hollow portion of the apparatus main body with the exhaust means, and the penetrating means is disposed at an end portion of the exhaust tube. Spot removal device.   The moving body is a moving cylinder fixed to an end of an exhaust tube that communicates the hollow portion of the apparatus main body with the exhaust means, and the penetrating means is an end of the moving cylinder or the exhaust tube. The dry spot removing apparatus according to claim 1, which is disposed in any one of the above. The inside of the film is evacuated in a state where the fiber sheet laminated body placed on the mold is wrapped with a film, so that a resin is poured between the film and the fiber sheet laminated body, and the resin is added to the fiber sheet. A dry spot removal method for removing dry spots generated during VaRTM molding impregnated in a laminate,
After forming a vacuum environment on the film at the dry spot occurrence location or in the vicinity thereof,
A dry spot removing method of exhausting a gas in the dry spot by making a through hole in the film while maintaining a vacuum environment on the film.

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