WO2020178948A1 - Sac à vide et procédé de fabrication de sac à vide - Google Patents

Sac à vide et procédé de fabrication de sac à vide Download PDF

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Publication number
WO2020178948A1
WO2020178948A1 PCT/JP2019/008399 JP2019008399W WO2020178948A1 WO 2020178948 A1 WO2020178948 A1 WO 2020178948A1 JP 2019008399 W JP2019008399 W JP 2019008399W WO 2020178948 A1 WO2020178948 A1 WO 2020178948A1
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WO
WIPO (PCT)
Prior art keywords
frame
vacuum bag
synthetic rubber
fiber
reinforced plastic
Prior art date
Application number
PCT/JP2019/008399
Other languages
English (en)
Japanese (ja)
Inventor
豊久 内尾
Original Assignee
日本飛行機株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 日本飛行機株式会社 filed Critical 日本飛行機株式会社
Priority to JP2019547335A priority Critical patent/JP6625300B1/ja
Priority to PCT/JP2019/008399 priority patent/WO2020178948A1/fr
Publication of WO2020178948A1 publication Critical patent/WO2020178948A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
    • B29C43/10—Isostatic pressing, i.e. using non-rigid pressure-exerting members against rigid parts or dies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
    • B29C43/10—Isostatic pressing, i.e. using non-rigid pressure-exerting members against rigid parts or dies
    • B29C43/12—Isostatic pressing, i.e. using non-rigid pressure-exerting members against rigid parts or dies using bags surrounding the moulding material or using membranes contacting the moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/32—Component parts, details or accessories; Auxiliary operations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/06—Fibrous reinforcements only
    • B29C70/10—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres
    • B29C70/16—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/40—Shaping or impregnating by compression not applied
    • B29C70/42—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
    • B29C70/44—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using isostatic pressure, e.g. pressure difference-moulding, vacuum bag-moulding, autoclave-moulding or expanding rubber-moulding

Definitions

  • the present invention relates to a vacuum bag used when heat and pressure molding a fiber reinforced plastic laminate.
  • CFRP Carbon Fiber Reinforced Plastics
  • CFRP Carbon Fiber Reinforced Plastics
  • glass fiber, quartz glass fiber, and aramid fiber may be used.
  • a prepreg sheet laminated body is laminated on a jig stand and shaped into a product shape.
  • the prepreg sheet is formed by impregnating a reinforcing material such as carbon fiber with an uncured thermosetting resin, and is formed into a sheet shape.
  • Unsaturated polyester, epoxy resin, phenol resin, etc. are used as the thermosetting resin.
  • the shaped fiber-reinforced plastic laminate is bagged together with the jig table, evacuated, conveyed to an autoclave device, and heated and pressed. As a result, the resin is cured and the fiber-reinforced plastic laminate is molded. Demold the product each time.
  • thermoplastic resin such as polyamide resin or polypropylene resin may be used instead of the thermosetting resin.
  • the thermoplastic resin is softened by heating and then solidified by cooling.
  • a vacuum bag is used for evacuation (Patent Document 1).
  • the vacuum bag uses a polymer film such as nylon or a diaphragm made of a silicon material.
  • the vacuum bag is discarded after each heating/pressurizing step, and a new vacuum bag is used in the next heating/pressing step. As a result, it is reflected in the product manufacturing cost. Further, the disposal cost is also reflected in the product manufacturing cost.
  • a reusable vacuum bag has been proposed.
  • Currently available vacuum bags include a metal frame that supports the diaphragm.
  • the vacuum bag having a metal frame has the following problems.
  • the manufacturing process is complicated because it goes through multiple processes such as bonding the diaphragm to the metal frame.
  • members such as aircraft and automobiles have complicated shapes such as free-form surfaces.
  • the details of the free-form surface will be described later.
  • the jig base must also have a free-form surface, and the frame must also support the free-form surface.
  • the processing is not easy. The manufacturing process becomes more complicated.
  • the present invention is intended to solve the above problems, and an object thereof is to provide a reusable vacuum bag that is lightweight, has excellent workability, and is easy to manufacture.
  • the present invention which solves the above-mentioned problems, is a vacuum bag used for vacuuming a fiber sheet laminated on a jig stand.
  • a diaphragm made of a silicon-based material that covers the fiber sheet, a frame that supports the diaphragm, and a seal provided on the lower surface of the frame along the frame are provided, and the frame has a fiber-reinforced plastic.
  • Light weight as the frame has fiber reinforced plastic. As a result, the work of attaching and detaching the vacuum bag is easy and the workability is excellent.
  • the portion of the frame made of fiber reinforced plastic is covered with non-silicon synthetic rubber, and the curing temperature range of the synthetic rubber and the curing temperature range of the resin used for the fiber reinforced plastic overlap.
  • Non-silicon synthetic rubber has a high affinity with fiber reinforced plastics.
  • the fiber-reinforced plastic and synthetic rubber of the frame are integrally molded by heat and pressure molding. Further, in the same step, the synthetic rubber and the diaphragm are bonded. That is, it is easy to manufacture.
  • fibers are arranged in one direction in the longitudinal direction of the frame in the part made of fiber reinforced plastic of the frame.
  • the straightness of the fiber can counter the external force.
  • the portion of the frame made of fiber reinforced plastic is interposed between the first layer and the second layer in which the fibers are arranged in one direction of the frame longitudinal direction, and the first layer and the second layer, A third layer in which the fibers have a woven structure is laminated to be formed.
  • the jig base has a free curved surface
  • the frame has a shape corresponding to the free curved surface of the jig base.
  • the present invention that solves the above problems is a vacuum bag manufacturing method.
  • the vacuum bag includes a diaphragm made of a silicon-based material that covers a fiber sheet for a product, a frame that supports the diaphragm, and a seal that is provided on the lower surface of the frame along the frame, and the frame is fiber-reinforced. It is formed by covering a portion made of plastic with a non-silicon synthetic rubber.
  • a first non-silicon synthetic rubber sheet, a plurality of fiber sheets for a prepreg-shaped frame, a second non-silicon synthetic rubber sheet, an adhesive film, and a diaphragm are laminated in this order on a jig stand to form a laminate,
  • the laminate is heated and pressurized in a vacuum state by covering it with another vacuum bag, and integrally molded.
  • the reusable vacuum bag according to the present invention is easily manufactured by integral molding using an autoclave device used for manufacturing a product, through a process similar to that of manufacturing a product.
  • the reusable vacuum bag according to the present invention is lightweight and has excellent workability.
  • the reusable vacuum bag according to the present invention is easily manufactured by integral molding.
  • FIG. 1 is a partial cross-sectional perspective view showing a schematic configuration of the vacuum bag 10.
  • the vacuum bag 10 is composed of a diaphragm 11, a frame 12 (partially sectional view), and a seal 13 (see FIG. 2).
  • the diaphragm 11 covers the fiber-reinforced plastic laminate before molding.
  • the frame 12 is bonded to the peripheral edge of the diaphragm 11 to support the diaphragm 11. Details will be described later separately.
  • the seal 13 is provided on the lower surface of the frame 12 along the frame 12. At the time of evacuation, it is elastically deformed to ensure the sealing property between the surface of the jig base 30 and the vacuum bag 10.
  • the diaphragm 11 and the seal 13 may be equivalent to those of the conventional technology. That is, the vacuum bag 10 of the present embodiment is characterized in that the frame 12 has a fiber reinforced plastic.
  • the frame 12 is made of fiber reinforced plastic.
  • the fiber reinforced plastic is obtained by laminating prepreg sheets and heat-pressing them.
  • FIG. 3 is a schematic view of the laminated structure 20 of the prepreg sheet of the frame 12.
  • the laminated structure 20 includes a first layer 21 that is a first prepreg sheet, a second layer 22 that is a second prepreg sheet, and a third layer 23 that is a third prepreg sheet.
  • Each of the layers 21 to 23 includes a case where a single prepreg sheet is formed and a case where a plurality of prepreg sheets are laminated and formed.
  • the fibers are arranged in the frame longitudinal direction unidirection (UD).
  • the fibers can maximize linearity with respect to external force.
  • the fibers rise and fall in the vertical direction, so that the straightness cannot be exhibited. There is a risk that the counterforce will be dispersed.
  • the fibers are arranged in the longitudinal and transverse directions and have a woven structure, for example, plain weave (PW).
  • the third layer (PW layer) 23 is interposed between the first layer 21 (UD layer) and the second layer 22 (UD layer).
  • the laminated structure 20 has a sandwich structure.
  • a plain weave is given as a representative example of the woven structure, but the present invention is not limited to this.
  • the laminated structure 20 of the present embodiment has a sandwich structure of UD layer-PW layer-UD layer, but may have a sandwich structure of PW-UD-PW. Further, only the UD layer may be used.
  • thermosetting resin of the prepreg is thermoset at about 180° C. ( ⁇ 20° C.) due to the relationship with the curing temperature range of synthetic rubber (detailed separately). Further, the thermosetting resin preferably has a heat resistance of about 200 ° C. ( ⁇ 20 ° C.).
  • an epoxy resin EP, a cyanate ester resin, a bismaleimide resin, a benzoxazine resin, etc. are assumed.
  • the fiber-reinforced plastic part 20 of the frame 12 is preferably covered with a thermosetting non-silicon synthetic rubber 26.
  • the non-silicon synthetic rubber may contain a small amount of silicon component to the extent that the physical properties are not affected.
  • the curing temperature it is preferable to heat cure in the autoclave device used for product manufacturing.
  • it is preferably thermoset at about 180 ° C. ( ⁇ 20 ° C.). Further, it is preferable to have heat resistance of about 200 ° C. ( ⁇ 20 ° C.).
  • the air pad rubber is an uncured non-silicon synthetic rubber, is heated to 176° C., is pressurized to 0.6 MPa, is hardened in about 2 hours, and has heat resistance of 204° C.
  • synthetic rubbers with high heat resistance include acrylic rubbers ACM, ANM, ethylene vinyl acetate rubber EVA, epichlorohydrin rubber CO, ECO.
  • the curing temperature range of the synthetic rubber 26 and the curing temperature range of the laminated structure 20 thermosetting resin overlap.
  • the synthetic rubber 26 is thermoset at about 180° C. ( ⁇ 20° C.)
  • the thermosetting resin 20 is also thermoset at about 180° C. ( ⁇ 20° C.).
  • the diaphragm 11 is made of a silicon-based material, it has a poor affinity with the frame 12 including the fiber-reinforced plastic laminated structure 20 and has a problem in adhesion.
  • the interposition of the synthetic rubber 26 between the diaphragm 11 and the laminated structure 20 improves the adhesiveness.
  • the reusable vacuum bag 10 is assumed to be repeatedly heated and pressurized in the autoclave device.
  • the synthetic rubber 26 protects the laminated structure 20 against repeated heat and pressure from the outside, and reduces deterioration of the laminated structure 20.
  • Synthetic rubber 26 has elasticity. At the time of evacuation, the seal 13 and the seal 13 are elastically deformed to ensure the sealability.
  • FIG. 4 is an explanatory diagram of a method of manufacturing the vacuum bag 10.
  • the uncured synthetic rubber sheet 27, the prepreg first layer 21, the prepreg third layer 23, the prepreg second layer 22, the uncured synthetic rubber sheet 28, the adhesive film 29, and the diaphragm 11 are laminated in this order on the jig base 30.
  • the uncured synthetic rubber sheets 27 and 28 have a size larger than the prepreg layers 21 to 23.
  • the uncured synthetic rubber sheets 27 and 28 sandwich and include the prepreg layers 21 to 23.
  • ⁇ Tow is arranged on all sides of the laminated structure 20 so that the laminated structure 20 can communicate with the outside of the synthetic rubber coating.
  • the uncured vacuum bag 10 is bagged together with the jig base 30 by a vacuum bag, conveyed to an autoclave device, and heated and pressed.
  • the vacuum bag used when manufacturing the vacuum bag may be a conventional technique.
  • thermosetting resin of the synthetic rubber 26 and the curing temperature range of the laminated structure 20 thermosetting resin overlap (approximately the same). Therefore, the synthetic rubber 26 and the thermosetting resin of the laminated structure 20 are heated by the autoclave device so as to reach the curing temperature or higher.
  • the temperature was reduced to 180°C by heating, 0.6 MPa by pressurization, maintained for about 2 hours, and lowered in temperature.
  • synthetic rubber is semi-cured (commonly called B stage), but it cures at about 180°C.
  • the thermosetting resin of the laminated structure 20 which is not cured at room temperature is also cured at about 180°C.
  • the uncured synthetic rubber sheets 27 and 28 become the synthetic rubber 26.
  • the organic solvent gas generated from the thermosetting resin of the laminated structure 20 during heating is discharged outside the synthetic rubber coating through the tow.
  • the synthetic rubber 26 remains cured and the thermosetting resin of the laminated structure 20 remains cured even when the temperature is lowered or reduced.
  • the synthetic rubber 26 has a good affinity with the thermosetting resin of the laminated structure 20. Further, the synthetic rubber 26 has a good affinity with the silicon-based material 11.
  • the laminated structure 20, the synthetic rubber 26 and the diaphragm 11 are integrally molded while adhering.
  • the diaphragm 11 is subjected to secondary vulcanization (low-molecular-weight siloxane volatilization treatment) in a series of heating and pressurization.
  • the vacuum bag 10 can be integrally molded by using the autoclave device used for manufacturing the product, through a process similar to the manufacturing of the product. That is, it can be easily manufactured.
  • the ease of manufacturing the vacuum bag 10 becomes remarkable (detailed separately).
  • thermosetting resin such as an epoxy resin
  • thermoplastic resin may be used.
  • the thermoplastic resin is softened by heating but solidified by cooling.
  • FIG. 5 is a diagram for explaining each state in the product manufacturing process. A prototype model of the vacuum bag 10 is shown.
  • Fig. 5 shows the state before construction.
  • the jig base 30 is described.
  • the middle part of FIG. 5 shows a state in which prepreg sheets are laminated and an uncured fiber-reinforced plastic laminate (uncured laminate) is shaped.
  • FIG. 5 shows a state in which the uncured laminate is covered with the jig base 30 by the vacuum bag 10 and bagging is performed.
  • FIG. 6 shows an example of a heating/pressurizing profile in the autoclave device.
  • the horizontal axis is time. However, this is an example and the present application is not limited to this.
  • the temperature is maintained at about 180°C ( ⁇ 20°C) for several tens of minutes to several hours and maintained for several hours (second heating stage).
  • second heating stage For example, in the case of an epoxy resin, curing starts at over 160°C. Then, the pressure is reduced to 60° C. or lower again for about 1 hour, and depressurization is started.
  • the product is removed from the autoclave together with the jig table 30 and the product is demolded. Demolding also includes removing the vacuum bag 10 from the jig base 30.
  • the frame 12 of the vacuum bag 10 is lightweight because it is made of fiber reinforced plastic. Therefore, the work of attaching and detaching the vacuum bag 10 is easy and the workability is excellent.
  • the frame 12 of the vacuum bag 10 is covered with synthetic rubber, and the synthetic rubber 26, together with the seal 13, is appropriately elastically deformed during evacuation. This ensures hermeticity. As a result, the problem of evacuation is reduced. Workability is also excellent in this respect.
  • the frame 12 has a shape corresponding to the free curved surface of the jig base 30.
  • the present application is not limited to the case where the jig base 30 already exists or has a free curved surface (may include a new installation, a flat surface, or a simple curved surface), but the jig base 30 may already exist or is free. In the case of having a curved surface, the effect of the present application becomes remarkable.
  • -A free-form surface is a curved surface that is set by setting some intersections and curvatures in space and interpolating each intersection with a higher-order equation. It is different from a simple curved surface that can be expressed by a simple mathematical formula such as a sphere or a cylindrical surface.
  • the jig base used for the prototype model shown in FIG. 5 has a free-form surface.
  • the frame 12 has a shape corresponding to the free curved surface of the jig base 30.
  • the vacuum bag of the present application (particularly the frame 12) is manufactured on the existing jig table having a free curved surface, it necessarily follows the free curved surface shape of the existing jig table. Therefore, detailed examination at the design stage is unnecessary, and the product can be manufactured accurately even without design data of the free-form surface.
  • the jig base has a free-form surface
  • the vacuum bag of the present application since the vacuum bag of the present application is manufactured with high accuracy, it adheres to the free curved surface. Further, in the vacuum bag of the present application, the synthetic rubber 26 is also elastically deformed as appropriate. Also in this respect, the sealing property is high.
  • a semi-preg containing a thermoplastic resin that softens at a relatively high temperature (for example, 180 to 220° C.) may be used.
  • the relatively high temperature means a high temperature as compared with the heating profile at the time of manufacturing the product (see FIG. 6).
  • polycarbonate resin PC nylon 6 resin (polyamide) PA6, polyetherimide resin PEI, polyethylene terephthalate resin PET, polyphenylene sulfide resin PPS, polyetheretherketone resin PEEK, and the like are assumed.
  • the temperature is slightly higher than the heating temperature of the manufacturing method of the embodiment of the present application.
  • the autoclave is used to heat the thermoplastic resin of the laminated structure 20 to the softening temperature or higher.
  • the temperature was reduced to 200°C by heating and 0.6 MPa by pressurization, maintained for about 2 hours, and lowered in temperature and decompressed.
  • thermoplastic resin of the laminated structure 20 is softened at, for example, 200 ° C. and solidified by lowering the temperature.
  • the vacuum bag 10 can be integrally molded by using the autoclave device used for manufacturing the product, through a process similar to the manufacturing of the product. That is, it can be easily manufactured.
  • the usage method of the modified example is the same as the usage method of the embodiment of the present application.
  • the softening temperature of the thermoplastic resin of the laminated structure 20 is relatively high. In other words, it does not soften at the temperature in the heating and pressurizing profile (FIG. 6) in the product manufacturing process, and maintains the solidified state.
  • the frame 12 of the present application is covered with synthetic rubber 26 to protect the laminated structure 20.
  • the vacuum bag 10 of the modified example can be reused.
  • Vacuum Bag 11 Diaphragm 12 Frame 13 Seal 20 Laminated Structure 21 Laminated First Layer (UD Layer) 22 Laminated second layer (UD layer) 23 Layered Third Layer (PW Layer) 26 Synthetic Rubber Cover 27 Synthetic Rubber Sheet 28 Synthetic Rubber Sheet 29 Adhesive Film 30 Jig Stand

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Textile Engineering (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Moulding By Coating Moulds (AREA)

Abstract

L'invention concerne un sac à vide qui est léger, présente une excellente aptitude au façonnage, et peut être facilement fabriqué et réutilisé. Ce sac à vide (10) est composé d'un diaphragme (11), d'une armature (12), et d'un joint d'étanchéité (13). L'armature (12) est composée d'une structure stratifiée en plastique renforcé par des fibres (20). La structure stratifiée en plastique renforcé par des fibres (20) est recouverte d'un caoutchouc synthétique thermodurcissable qui n'est pas à base de silicium (26). La région de température de durcissement du caoutchouc synthétique (26) et la région de température de durcissement de la résine thermodurcissable de la structure stratifiée (20) se chevauchent. Par conséquent, le caoutchouc synthétique (26) et la structure stratifiée (20) sont moulés en un corps. Lors de la même étape, le caoutchouc synthétique (16) est collé au diaphragme à base de silicium (11). Autrement dit, le sac à vide (10) est facilement fabriqué par moulage mono-corps. En particulier, lorsqu'une base de gabarit (30) a une surface libre, l'effet de fabrication facile devient remarquable.
PCT/JP2019/008399 2019-03-04 2019-03-04 Sac à vide et procédé de fabrication de sac à vide WO2020178948A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2019547335A JP6625300B1 (ja) 2019-03-04 2019-03-04 真空バッグおよび真空バッグの製造方法
PCT/JP2019/008399 WO2020178948A1 (fr) 2019-03-04 2019-03-04 Sac à vide et procédé de fabrication de sac à vide

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2019/008399 WO2020178948A1 (fr) 2019-03-04 2019-03-04 Sac à vide et procédé de fabrication de sac à vide

Publications (1)

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WO2020178948A1 true WO2020178948A1 (fr) 2020-09-10

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PCT/JP2019/008399 WO2020178948A1 (fr) 2019-03-04 2019-03-04 Sac à vide et procédé de fabrication de sac à vide

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112793186A (zh) * 2020-12-15 2021-05-14 中国商用飞机有限责任公司北京民用飞机技术研究中心 一种防止非热压罐真空袋成型复合材料表面贫胶或针孔的方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4681651A (en) * 1986-08-07 1987-07-21 Lockheed Corporation Vacuum bag sealing system
JP2013078937A (ja) * 2011-08-26 2013-05-02 Boeing Co:The 一体補強された再使用可能な真空バッグ及びその製造方法
JP2018111256A (ja) * 2017-01-12 2018-07-19 日本飛行機株式会社 フレーム及び真空引き方法

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5775811A (en) * 1980-10-30 1982-05-12 Tachikawa Spring Co Ltd Metal mold for molding plastic sheet frame
JPH071486A (ja) * 1993-06-17 1995-01-06 Mitsui Toatsu Chem Inc 成形材料の成形方法とその成形装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4681651A (en) * 1986-08-07 1987-07-21 Lockheed Corporation Vacuum bag sealing system
JP2013078937A (ja) * 2011-08-26 2013-05-02 Boeing Co:The 一体補強された再使用可能な真空バッグ及びその製造方法
JP2018111256A (ja) * 2017-01-12 2018-07-19 日本飛行機株式会社 フレーム及び真空引き方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112793186A (zh) * 2020-12-15 2021-05-14 中国商用飞机有限责任公司北京民用飞机技术研究中心 一种防止非热压罐真空袋成型复合材料表面贫胶或针孔的方法

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JP6625300B1 (ja) 2019-12-25

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