Bladder bag and molding method of composite material

Patent metadata

Field	Value
Publication number	US-11065832-B2
Application number	US-201716323651-A
Country	US
Kind code	B2
Filing date	Oct 13, 2017
Priority date	Nov 22, 2016
Publication date	Jul 20, 2021
Grant date	Jul 20, 2021

Abstract

A bladder bag is a mold for molding inside of a composite material structure. The composite material structure includes a narrow portion formed by narrowing a part of the inside and a space portion formed so as to be adjacent to the narrow portion. The bladder bag includes a bladder bag main body and a cord-like member. The bladder bag main body includes a narrow molding portion for molding the narrow portion of the composite material structure, a space molding portion for molding the space portion of the composite material structure, and an air intake for introducing air. The cord-like member is provided inside the bladder bag main body, passes through the narrow molding portion from the air intake, and is connected to an inner surface of the space molding portion.

First claim

The invention claimed is:

1. A bladder bag as a mold for molding inside of a composite material structure, the composite material structure including a narrow portion formed by narrowing a part of the inside and a space portion formed so as to be adjacent to the narrow portion, the bladder bag comprising:
a bladder bag main body that includes a narrow molding portion for molding the narrow portion of the composite material structure, a space molding portion for molding the space portion of the composite material structure, and an air intake for introducing air; and
a cord-like member that is provided inside the bladder bag main body, passes through the narrow molding portion from the air intake, and is connected to an inner surface of the space molding portion.

2. The bladder bag according to claim 1 , wherein
the bladder bag main body includes a corner portion in the space molding portion,
a plurality of the cord-like members are provided, and
at least one of the cord-like members is connected to the corner portion of the space molding portion.

3. The bladder bag according to claim 1 , wherein
the bladder bag main body includes a reinforcing member that reinforces the space molding portion,
a plurality of the cord-like members are provided, and
at least one of the cord-like members is connected to the reinforcing member of the space molding portion.

4. The bladder bag according to claim 1 , further comprising a first magnet that is provided in the space molding portion of the bladder bag main body, wherein
the first magnet makes the bladder bag main body and the composite material structure close to each other by bringing a second magnet having a magnetic pole differing from a magnetic pole of the first magnet close to the first magnet from outside of the composite material structure, and separates the bladder bag main body and the composite material structure from each other by bringing a third magnet having the same magnetic pole as the magnetic pole of the first magnet close to the first magnet from the outside of the composite material structure.

5. The bladder bag according to claim 1 , further comprising a solid member that is provided on a side of an outer surface of the space molding portion of the bladder bag main body.

6. The bladder bag according to claim 1 , further comprising a sensor that is provided on a side of the inner surface of the space molding portion of the bladder bag main body and measures a physical amount of the inside of the composite material structure.

7. The bladder bag according to claim 6 , further comprising a wiring connected to the sensor from the air intake.

8. The bladder bag according to claim 6 , wherein the sensor is capable of wireless information communication.

9. The bladder bag according to claim 1 , wherein the narrow molding portion is capable of being connected to and separated from the bladder bag main body.

10. The bladder bag according to claim 9 , wherein the space molding portion separated by the narrow molding portion is to be integrated with the composite material structure.

11. A bladder bag as a mold for molding inside of a composite material structure, the composite material structure including a narrow portion formed by narrowing a part of the inside and a space portion formed so as to be adjacent to the narrow portion, the bladder bag comprising: a bladder bag main body that includes a narrow molding portion for molding the narrow portion of the composite material structure, a space molding portion for molding the space portion of the composite material structure, and an air intake for introducing air; a deaerating circuit that is provided along at least a part of an outer surface of the bladder bag main body; and a string connecting the bladder bag main body and the deaerating circuit; wherein the deaerating circuit is arranged between the bladder bag main body and the composite material structure when the composite material structure is formed, configured to make the bladder bag main body and the composite material structure close to each other by discharging the air in the deaerating circuit, and configured to separate the bladder bag main body and the composite material structure from each other by introducing the air into the deaerating circuit.

12. The bladder bag according to claim 11 , wherein
the bladder bag main body includes a corner portion in the space molding portion, and
the string is connected to the corner portion of the space molding portion.

13. The bladder bag according to claim 11 , further comprising a first magnet that is provided in the space molding portion of the bladder bag main body, wherein
The first magnet makes the bladder bag main body and the composite material structure close to each other by bringing a second magnet having a magnetic pole differing from a magnetic pole of the first magnet close to the first magnet from outside of the composite material structure, and separates the bladder bag main body and the composite material structure from each other by bringing a third magnet having the same magnetic pole as the magnetic pole of the first magnet close to the first magnet from the outside of the composite material structure.

14. The bladder bag according to claim 11 , further comprising a solid member that is provided on a side of an outer surface of the space molding portion of the bladder bag main body.

15. The bladder bag according to claim 11 , further comprising a sensor that is provided on a side of the inner surface of the space molding portion of the bladder bag main body and measures a physical amount of the inside of the composite material structure.

16. The bladder bag according to claim 15 , further comprising a wiring connected to the sensor from the air intake.

17. The bladder bag according to claim 15 , wherein the sensor is capable of wireless information communication.

18. The bladder bag according to claim 11 , wherein the narrow molding portion is capable of being connected to and separated from the bladder bag main body.

19. The bladder bag according to claim 18 , wherein the space molding portion separated by the narrow molding portion is to be integrated with the composite material structure.

20. A molding method of a composite material structure, the composite material structure including a narrow portion formed by narrowing a part of inside and a space portion formed so as to be adjacent to the narrow portion, the method comprising:
arranging, at the inside of the composite material structure, a bladder bag as a mold including: a bladder bag main body that has a narrow molding portion for molding the narrow portion of the composite material structure, a space molding portion for molding the space portion of the composite material structure, and an air intake for introducing air; and a cord-like member that is provided inside the bladder bag main body, passes through the narrow molding portion from the air intake, and is connected to an inner surface of the space molding portion;
molding the composite material structure while applying pressure to the inside of the composite material structure by introducing the air from the air intake of the bladder bag main body of the bladder bag arranged at the arranging; and
taking out the bladder bag from the inside of the composite material structure by pulling the cord-like member from a direction of the air intake after the molding.

21. The molding method according to claim 20 , wherein at the taking, the cord-like member is p

Assignees

• Mitsubishi Heavy Ind Ltd

Inventors

• Takagi Kiyoka
• Ishida Jun
• Kamo Sota
• Yoshino Katsuya
• Abe Toshio
• Hasegawa Koichi
• Sugiyama Yoshihiro
• Ishida Takashi

Classifications

• B29C33/50 Primary

  elastic {or flexible (for isostatic pressing B29C43/3642)} · CPC title

• B29C70/342

  using isostatic pressure · CPC title

• B29C70/446

  Moulding structures having an axis of symmetry or at least one channel, e.g. tubular structures, frames · CPC title

• B29C70/541

  Positioning reinforcements in a mould, e.g. using clamping means for the reinforcement (positioning inserts in moulds B29C33/12; lay-up on a mould B29C70/30) · CPC title

• B29K2995/0008

  Magnetic or paramagnetic · CPC title