WO2020178950A1 - Tampon de pression, procédé de production de tampon de pression et procédé de production de structure en sandwich à âme en nid d'abeille - Google Patents

Tampon de pression, procédé de production de tampon de pression et procédé de production de structure en sandwich à âme en nid d'abeille Download PDF

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Publication number
WO2020178950A1
WO2020178950A1 PCT/JP2019/008401 JP2019008401W WO2020178950A1 WO 2020178950 A1 WO2020178950 A1 WO 2020178950A1 JP 2019008401 W JP2019008401 W JP 2019008401W WO 2020178950 A1 WO2020178950 A1 WO 2020178950A1
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WIPO (PCT)
Prior art keywords
pressure pad
honeycomb core
sandwich structure
inner shell
core sandwich
Prior art date
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PCT/JP2019/008401
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English (en)
Japanese (ja)
Inventor
豊久 内尾
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日本飛行機株式会社
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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 PCT/JP2019/008401 priority Critical patent/WO2020178950A1/fr
Priority to JP2019521165A priority patent/JP6570160B1/ja
Publication of WO2020178950A1 publication Critical patent/WO2020178950A1/fr

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    • 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/10—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material
    • B32B3/12—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material characterised by a layer of regularly- arranged cells, e.g. a honeycomb structure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/28—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer impregnated with or embedded in a plastic substance

Definitions

  • the present invention relates to a pressure pad used when heating and pressing a honeycomb core sandwich structure.
  • CFRP Carbon Fiber Reinforced Plastics
  • honeycomb core sandwich structure as a material that uses FRP, which is light and strong.
  • the honeycomb core sandwich structure is one in which the upper and lower surfaces of a honeycomb core are covered with FRP (see Patent Document 1). This makes it even stronger and lighter.
  • the honeycomb core sandwich structure has high rigidity.
  • the molding method of a general honeycomb core sandwich structure will be briefly explained.
  • a second prepreg laminate to be the lower skin is placed on the jig along the shape of the jig trapezoid.
  • the honeycomb core is arranged on the second prepreg laminate, and further, the first prepreg laminate serving as the upper skin is placed so as to fit the honeycomb core shape, and the honeycomb core is covered.
  • shaping may be performed using a hot drape device.
  • the prepreg laminated body is a laminate of a plurality of prepreg sheets.
  • 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.
  • the shaped honeycomb core sandwich structure is bagged together with the jig stand, transported to the autoclave device, and heated and pressurized. As a result, the resin is cured and the honeycomb core sandwich structure is molded.
  • thermosetting resin Unsaturated polyester, epoxy resin, phenol resin, etc. are used as the thermosetting resin. Further, a thermoplastic resin such as a polyamide resin or a polypropylene resin may be used instead of the thermosetting resin.
  • Some of the above-mentioned small steps include splice processing and stabilization processing. After the splice treatment, it is heat-molded. After the stabilization treatment, it is heat-molded.
  • the inventor of the present application considered omitting the heat molding step after the splice processing and the stabilizer processing.
  • the present invention solves the above problems, and an object of the present invention is to provide a pressure pad that can simplify the manufacturing process of a honeycomb core sandwich structure.
  • the present invention for solving the above problems is a removable pressure pad for forming a honeycomb core sandwich structure by drawing a vacuum, heating and pressurizing.
  • the honeycomb core sandwich structure comprises a honeycomb core and fiber-reinforced plastics provided above and below the honeycomb core.
  • the pressure pad is a top surface portion that faces the upper portion of the honeycomb core sandwich structure, a side surface portion that faces the side portion of the honeycomb core sandwich structure, and a peripheral portion that faces the edge portion of the honeycomb core sandwich structure.
  • the honeycomb core sandwich structure has a shape corresponding to the outer shape of the honeycomb core sandwich structure, a pressure pad body made of thermosetting non-silicon synthetic rubber, and a release film adhered to the surface of the pressure pad body.
  • an inner shell made of fiber reinforced plastic, which is installed in the pressure pad body.
  • Non-silicon synthetic rubber has a high affinity with fiber reinforced plastics.
  • the pressure pad body, the release film, and the inner shell are integrally molded by heat and pressure molding. That is, it is easy to manufacture.
  • the inner shell resists the pressure from the outside when the product is manufactured (when using the pressure pad). As a result, some of the conventional steps can be omitted.
  • a first inner shell is inserted at a position straddling the lower portion of the side surface portion and the peripheral portion, and the first inner shell is made of fiber reinforced plastic containing a thermoplastic resin, and the softening of the thermoplastic resin is performed.
  • the temperature is lower than the curing temperature of the synthetic rubber.
  • the first inner shell does not soften at a relatively low temperature and resists the pressure applied to the side surface from the outside. It deforms while softening at a relatively high temperature and follows the dimensional error of the honeycomb core sandwich structure.
  • a second inner shell is inserted at a position corresponding to the top surface portion, the second inner shell is made of fiber reinforced plastic containing a thermoplastic resin, and the softening temperature of the thermoplastic resin is: Higher than the curing temperature of the synthetic rubber.
  • the second inner shell does not soften and opposes the pressure on the top surface from the outside.
  • a second inner shell is inserted at a position corresponding to the top surface portion, the second inner shell is made of a fiber reinforced plastic containing a thermosetting resin, and has a curing temperature range of the synthetic rubber. It overlaps with the curing temperature range of the thermosetting resin.
  • the second inner shell maintains the cured state and opposes the pressure on the top surface from the outside.
  • the second inner shell communicates with the outside through a tow made of carbon fiber.
  • the present invention that solves the above problems is a method of manufacturing a pressure pad.
  • a mold corresponding to the honeycomb core sandwich structure before molding or a honeycomb core sandwich structure is installed, so as to cover the honeycomb core sandwich structure or the mold, the synthetic rubber, and the release film.
  • the inner shell and the inner shell are arranged, and the inner shell is further covered with a vacuum bag, which is evacuated and heated and pressed.
  • the pressure pad can be integrally molded using a process similar to product manufacturing using the autoclave device used for product manufacturing. That is, it can be easily manufactured.
  • the jig base has a free-form surface.
  • the jig base has a free surface, the effect of facilitating manufacturing becomes remarkable.
  • the present invention for solving the above-mentioned problems is a method for manufacturing a honeycomb core sandwich structure.
  • a honeycomb core sandwich structure before molding is placed on a jig table, the pressure pad is attached so as to cover the honeycomb core sandwich structure, and further covered by a vacuum bag to vacuum the honeycomb core sandwich structure.
  • the vacuum bag and the pressure pad are removed by pulling and applying heat and pressure.
  • the manufacturing process of the honeycomb core sandwich structure can be simplified.
  • the pressure pad according to the present invention is easy to manufacture.
  • FIG. 1 is a schematic view of a honeycomb core sandwich structure. A partial cross-sectional perspective view is shown, and the honeycomb core is extracted and enlarged.
  • the honeycomb sandwich structure is composed of a honeycomb core, a lower portion of fiber reinforced plastic provided on the lower surface of the honeycomb core, and an upper portion of fiber reinforced plastic provided on the upper surface of the honeycomb core.
  • the fiber reinforced plastic upper part and the fiber reinforced plastic lower part are formed by laminating prepreg sheets.
  • the honeycomb core is strong against the force from the vertical direction and weak against the force from the side direction. Therefore, in general, the side surface may be inclined so that the force from the side surface direction is not directly received.
  • the short side is the top and the long side is the bottom.
  • FIG. 2 is a comparison diagram between the outline of the conventional process and the outline of the process of the present application.
  • the outline of the conventional process will be described.
  • the honeycomb core is heated and molded (core heat foam).
  • the splicing process and the stabilizing process are performed.
  • Fig. 3 is an explanatory diagram of the outline of splice processing. However, the simulation processing is shown.
  • the size of the honeycomb core sandwich structure is large, it is difficult to form the core with one honeycomb core. Therefore, a plurality of honeycomb cores are joined and integrated using a foam adhesive.
  • a dent may occur along the corresponding portion. In order to prevent this, it is necessary to reinforce the location.
  • FIG. 4 is an explanatory diagram of the outline of the stabilization process.
  • the honeycomb core is strong against the force from the vertical direction and weak against the force from the side direction.
  • the side surface especially the lower side surface
  • Reinforcement is needed to prevent this.
  • the uncured honeycomb core sandwich structure 1 is bagged together with the jig base 30, conveyed to an autoclave device, and heated and pressed. As a result, the resin is cured and the honeycomb core sandwich structure (product 2) is formed.
  • FIG. 5 is an example of a heating / pressurizing profile in an 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 process of the present application is almost the same as the conventional process, the process of the present application is characterized by using the pressure pad 10 and omitting the thermoforming after the splice line process and the stabilizer process.
  • FIG. 6 is a partial cross-sectional perspective view showing a schematic configuration of the pressure pad 10.
  • the pressure pad 10 is used by mounting it on an uncured honeycomb core sandwich structure (laminate 1) and removing it from the cured honeycomb core sandwich structure (product 2). That is, it can be attached to and detached from the product.
  • the pressure pad 10 has a shape corresponding to the product 2. That is, it has a top surface portion 11, a side surface portion 12, and a peripheral edge portion 13.
  • the top surface portion 11 faces the upper portion of the honeycomb core sandwich structure body 1
  • the side surface portion 12 faces the side portion of the honeycomb core sandwich structure body 1
  • the peripheral edge portion 13 faces the edge portion of the honeycomb core sandwich structure 1.
  • the pressure pad peripheral portion 13 is slightly larger than the edge portion of the honeycomb core sandwich structure 1, and the pressure pad 10 together with the jig base 30 completely covers the honeycomb core sandwich structure 1.
  • the top surface portion 11 has a substantially flat plate shape, the side surface portion 12 is continuously provided downward from the peripheral edge of the top surface portion 11, and the peripheral edge portion 13 is continuously provided so as to project from the lower end of the side surface portion 12.
  • the result is a hat-like shape with a hollow space.
  • the pressure pad 10 includes a pressure pad body 16, a release film 17, and inner shells 18 and 19.
  • the inner shell (first inner shell) 18 is inserted at a position straddling the lower portion of the side surface portion 12 and the peripheral edge portion 13.
  • the inner shell (second inner shell) 19 is inserted at a position corresponding to the top surface portion.
  • FIG. 7 is a cross-sectional view showing the detailed configuration of the pressure pad 10.
  • the pressure pad body 16 has a shape corresponding to the outer shape of the honeycomb core sandwich structure 1. It is made of thermosetting non-silicon synthetic rubber. However, 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 release film 17 is adhered to the surfaces of both pressure pad bodies 16. Fluorine-based film is preferable. In the prototype model, a tetrafluoroethylene/hexafluoropropylene copolymer (FEP) film was used.
  • FEP tetrafluoroethylene/hexafluoropropylene copolymer
  • the inner shell 18 is made of a fiber reinforced plastic containing a thermoplastic resin, and the thermoplastic resin is preferably softened at a relatively low temperature (for example, 60 to 100° C.).
  • a relatively low temperature for example, 60 to 100° C.
  • acrylic resin PMMA, polypropylene resin PP, and the like are assumed.
  • the inner shell 19 is made of fiber reinforced plastic containing a thermoplastic resin, and the thermoplastic resin is preferably softened at a relatively high temperature (for example, 180 to 220° C.).
  • a relatively high temperature for example, 180 to 220° C.
  • polycarbonate resin PC nylon 6 resin (polyamide) PA6, polyetherimide resin PEI, polyethylene terephthalate resin PET, polyphenylene sulfide resin PPS, polyether ether ketone resin PEEK, etc. are assumed.
  • Pressure pad manufacturing method The manufacturing method of the pressure pad 10 is similar to the manufacturing method of the honeycomb core sandwich structure product 2.
  • a mold corresponding to the honeycomb core sandwich structure is placed on the jig table 30, and the mold release film 17, the uncured synthetic rubber 16, the semi-pregs 18, 19, the uncured synthetic rubber 16, and the mold release film are placed so as to cover the mold. 17 are stacked in this order (see FIG. 7).
  • the uncured pressure pad 10 is bagged together with the jig base 30 by a vacuum back, transported to the autoclave device, and heated and pressurized.
  • the softening temperature of the thermoplastic resin of the first inner shell 18 is lower than the curing temperature of the synthetic rubber 16.
  • the softening temperature of the thermoplastic resin of the second inner shell 19 is higher than the curing temperature of the synthetic rubber 16. Therefore, the second inner shell 19 is heated by the autoclave device so as to reach the softening temperature of the thermoplastic resin or higher (relatively high temperature).
  • 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. Changes in the states of the synthetic rubber 16, the thermoplastic resin of the first inner shell 18, and the thermoplastic resin of the second inner shell 19 will be described.
  • thermoplastic resin of the first inner shell 18 softens at a relatively low temperature (for example, 60 to 100 ° C.) and maintains the softened state during heating. When the temperature drops below the softening temperature during cooling, it solidifies.
  • thermoplastic resin of the second inner shell 19 is softened at, for example, 200° C. and solidified by lowering the temperature.
  • thermoplastic resin of the first inner shell 18 is softened, the synthetic rubber 16 is hardened, and the thermoplastic resin of the second inner shell 19 is softened.
  • thermoplastic resin of the first inner shell 18 is solidified, and the thermoplastic resin of the second inner shell 19 is solidified.
  • the synthetic rubber 16 remains cured.
  • the synthetic rubber is a non-silicon type, it has a high affinity with the fiber reinforced plastic, and the pressure pad body 16 and the inner shells 18 and 19 are integrally molded by a series of heating and heating.
  • the synthetic rubber 16 and the release film 17 are also integrated by a series of heating and heating.
  • the pressure pad can be integrally molded 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.
  • thermoplastic resin is used for both the first inner shell 18 and the second inner shell 19
  • the heating time can be shortened and a tow (TOW) addition step is not required as compared with the second embodiment (described later), Ease becomes remarkable.
  • the subject of the present application is to simplify the manufacturing process of the honeycomb core sandwich structure.
  • the pressure pad 10 manufacturing process has been added and runs counter to the present subject matter.
  • the pressure pad 10 is easy to manufacture and can be repeatedly used, the pressure pad 10 is hardly burdened on the entire process.
  • the semi-preg to be the second inner shell is laminated and integrally molded.
  • the semi-preg is heated in advance to form the second inner shell that has undergone softening and solidification, and is separately molded.
  • the second inner shell 19 may be inserted at the time of stacking.
  • the temperature is set to 180° C. (lower temperature than that in the above embodiment) by heating in the autoclave device, and the pressure is set to 0.6 MPa, which is maintained for about 2 hours.
  • the thermoplastic resin of the second inner shell 19 is not softened and maintains a solidified state. Naturally, the solidified state is maintained even after the temperature is lowered.
  • the pressure pad manufactured according to the modified example has the same configuration as the pressure pad 10 of the embodiment, and can be used similarly.
  • the manufacturing process of the product of the present application is almost the same as the manufacturing process of the conventional product, but the manufacturing process of the product of the present application is characterized by using the pressure pad 10 and omitting the heat forming after the splice line process and the stabilizer process.
  • thermosetting resin such as an epoxy resin
  • thermoplastic resin may be used.
  • the thermoplastic resin is softened by heating but solidified by cooling.
  • Fig. 8 shows the state before construction.
  • the jig base 30 is described.
  • the honeycomb core is heated and molded (core heat foam).
  • the splicing process and the stabilizing process are performed.
  • heat molding after the splice line treatment and the stabilization treatment is omitted.
  • a honeycomb core is installed and prepreg sheets are laminated to form an uncured honeycomb core sandwich structure (laminated body 1).
  • the pressure pad 10 is attached to the stack 1 (state of FIG. 9)
  • the stack 1 is bagged together with the jig table 30 by the vacuum bag (state of FIG. 10)
  • the stack 1 is conveyed to the autoclave device and heated. Heating and pressurization are performed based on the pressure profile (FIG. 5).
  • the resin is cured and the honeycomb core sandwich structure (product 2) is formed.
  • Demolding also includes removing the pressure pad 10 from the product 2. Further, the release film 17 allows the pressure pad 10 to be easily removed from the product 2, and the vacuum bag to be easily removed.
  • thermoplastic resin of the first inner shell 18 maintains a solidified state below the softening temperature (for example, 60 to 100 ° C.). Therefore, the pressure from the outside can be reliably countered.
  • the reinforcement for the stabilizing process is also thermoformed simultaneously with the thermoforming of the product. Therefore, the heat molding process after the stabilization process in the conventional process becomes unnecessary, and the product manufacturing process can be simplified.
  • thermoplastic resin of the first inner shell 18 softens at a relatively low softening temperature.
  • the first inner shell 18 is constrained within the synthetic rubber 16, and the first inner shell 18 is not extremely deformed. That is, the first inner shell 18 is appropriately deformed together with the synthetic rubber 16.
  • the synthetic rubber 16 has a proper elasticity even after being cured.
  • the uncured honeycomb core sandwich structure (laminate 1) has a dimensional error in the laminating process.
  • the pressure pad 10 is assumed to be used repeatedly. As a result, it seems that the pressure pad 10 cannot cope with the dimensional error of the laminate 1.
  • the synthetic rubber 16 and the first inner shell 18 are appropriately deformed to follow the dimensional error of the laminated body 1 and oppose the pressure from the outside. .. In the meantime, hardening of the laminated body 1 progresses, and the laminated body 1 itself can resist the pressure from the outside.
  • the softening temperature of the thermoplastic resin of the second inner shell 19 is relatively high. In other words, it does not soften at the temperature in the heating and pressurizing profile (FIG. 5) of the product manufacturing process, and maintains the solidified state. Therefore, the pressure from the outside can be reliably countered.
  • the reinforcement for splicing is also thermoformed simultaneously with the thermoforming of the product. Therefore, the heat molding process after the splicing process in the conventional process becomes unnecessary, and the product manufacturing process can be simplified.
  • the pressure pad peripheral portion 13 is slightly larger than the edge portion of the honeycomb core sandwich structure 1, and the pressure pad peripheral portion 13 is in close contact with the jig base 30 so that the edge portion of the honeycomb core sandwich structure 1 is It can be pressed against the jig base 30. That is, the uncured honeycomb core sandwich structure 1 can be fixed on the jig base 30 by mounting the pressure pad 10. Therefore, the fixing process to the jig base in the conventional process is not required, and the product manufacturing process can be simplified.
  • the heat molding step after the splice treatment and the heat molding step after the stabilization treatment are omitted by mounting the pressure pad 10, but the reinforcement during the splice treatment and the reinforcement during the stabilization treatment are performed.
  • the reinforcement during the splice process and the reinforcement during the stabilizer process may be omitted.
  • the first inner shell 18 protects the laminated body 1 from the pressure from the side (the above-mentioned action effects 1 and 2).
  • the second inner shell 19 protects the laminated body 1 from the pressure from above (the above-mentioned function 3). Therefore, reinforcement during the splice treatment and reinforcement during the stabilization treatment are not required, and the product manufacturing process can be simplified.
  • the inner shells 18 and 19 against the pressure from the outside, it is possible to omit the heat molding after the splice line treatment and the stabilizer treatment. Furthermore, the reinforcement during the splice treatment and the reinforcement during the stabilization treatment may be omitted.
  • the first inner shell 18 is slightly deformed to follow the dimensional error, so that the dimensional error management time and effort of the laminated body 1 can be reduced. Since the pressure pad peripheral portion 13 is in close contact with the jig base 30, the fixing process to the jig base can be omitted.
  • the pressure pad 10 can be easily manufactured by integral molding through steps similar to product manufacturing. Further, the pressure pad 10 can be used repeatedly. Therefore, the production of the pressure pad 10 hardly imposes a burden on the whole process and does not impair the above effects.
  • the curing is not limited to the case where the jig base 30 is existing or the case where the jig base 30 has a free curved surface, but the curing becomes remarkable when the jig base 30 is existing or has a free curved surface (described later). ).
  • the pressure pad 20 in the second embodiment is a modification of the second inner shell 19 of the pressure pad 10 in the first embodiment.
  • the second inner shell 19 of the first embodiment is made of fiber reinforced plastic containing a thermoplastic resin
  • the second inner shell 29 of the second embodiment is made of fiber reinforced plastic containing a thermosetting resin.
  • the shape formed by the top surface portion 11, the side surface portion 12, and the peripheral edge portion 13, and the configuration including the pressure pad body 16, the release film 17, and the inner shell 18 are common to the first embodiment.
  • the second inner shell 29 communicates with the outside through a tow (TOW) 21 made of carbon fiber.
  • TOW tow
  • thermosetting resin 29 The curing temperature range of the synthetic rubber 16 and the curing temperature range of the thermosetting resin 29 overlap.
  • the synthetic rubber 16 is thermoset at about 180° C. ( ⁇ 20° C.)
  • the thermosetting resin 29 is also thermoset at about 180° C. ( ⁇ 20° C.).
  • the thermosetting resin 29 preferably has a heat resistance of about 200° C. ( ⁇ 20° C.).
  • thermosetting resin 29 As a specific example of the thermosetting resin 29, an epoxy resin EP, a cyanate ester resin, a bismaleimide resin, a benzoxazine resin, or the like is assumed.
  • Pressure pad manufacturing method The method for manufacturing the pressure pad 20 in the second embodiment is substantially the same as the method for manufacturing the pressure pad 10 in the first embodiment.
  • a mold corresponding to the honeycomb core sandwich structure is placed on the jig table 30, and the mold release film 17, the uncured synthetic rubber 16, the semi-preg 18, the prepreg 29, the toe 21, the uncured synthetic rubber 16 are placed so as to cover the mold. ,
  • the release film 17 is laminated in this order.
  • FIG. 11 is a diagram illustrating a state in which the prepregs 29 are laminated and the tows 21 are arranged on the four sides of the prepreg 29 so that the prepreg 29 can communicate with the outside.
  • the uncured pressure pad 10 is bagged together with the jig base 30 by a vacuum back, transported to the autoclave device, and heated and pressurized.
  • the softening temperature of the thermoplastic resin of the first inner shell 18 is lower than the curing temperature of the synthetic rubber 16.
  • the curing temperature range of the thermosetting resin of the second inner shell 19 and the curing temperature range of the synthetic rubber 16 overlap (approximately the same). Therefore, the autoclave device is used to heat the synthetic rubber 16 so as to have a 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.
  • thermoplastic resin of the first inner shell 18 softens at a relatively low temperature (for example, 60 to 100° C.) and maintains the softened state during heating.
  • the synthetic rubber 16 and the thermosetting resin of the second inner shell 19 cure at about 180°C.
  • the organic solvent gas generated from the thermosetting resin of the second inner shell 19 at the time of heating is discharged through the toe 21.
  • thermoplastic resin of the first inner shell 18 solidifies.
  • the synthetic rubber 16 remains cured, and the thermosetting resin of the second inner shell 19 remains cured.
  • thermosetting resin 29 of the second embodiment has a good affinity with the synthetic rubber 16.
  • the pressure pad main body 16 and the inner shells 18 and 29 are integrally molded by a series of heating and heating. Further, due to the adhesiveness of the synthetic rubber, the synthetic rubber 16 and the release film 17 are also integrated by a series of heating and heating. That is, it is easy to manufacture.
  • the method of using the pressure pad 20 in the second embodiment is substantially the same as the method of using the pressure pad 10 in the first embodiment.
  • the pressure pad 20 is attached to the uncured honeycomb core sandwich structure (laminate) 1, heat and pressure molding is performed by an autoclave device, and the pressure pad 20 is removed from the product 2 at the time of demolding.
  • the action and effect of using the pressure pad 20 are almost the same as the action and effect of using the pressure pad 10.
  • thermoplastic resin of the second inner shell 19 in the first embodiment softens at a relatively high temperature, the solidified state is maintained in the heating and pressurizing profile in the product manufacturing process, while the second embodiment in the second embodiment does not.
  • the thermosetting resin of the inner shell 29 maintains the cured state.
  • FIG. 12 shows a pressure pad according to Modification 1.
  • the first inner shell 18 and the second inner shells 19 and 29 are provided, whereas the pressure pad according to the first modification includes only the first inner shell 18. There is no second inner shell 19, 29.
  • the product is relatively small and core splitting is not necessary, or if the splicing process is sufficient, the second inner shells 19 and 29 become unnecessary.
  • FIG. 13 shows a pressure pad according to Modification 2.
  • the first inner shell 18 and the second inner shells 19 and 29 are provided, whereas the pressure pad according to the second modification has only the second inner shells 19 and 29.
  • the first inner shell 18 is not provided.
  • the thermoplastic resin 19 in the first embodiment may be used, or the thermosetting resin 29 in the second embodiment may be used.
  • 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 represented by a simple mathematical formula such as a spherical surface or a cylindrical surface.
  • -Industrial products such as aircraft and automobiles have free-form surfaces.
  • the jig base used in the prototype model shown in FIG. 8 has a free curved surface.
  • the pressure pad of the present application is manufactured on an existing jig base having a free curved surface, it inevitably follows the free curved surface shape of the existing jig base. Therefore, detailed examination at the design stage is unnecessary, and the product can be manufactured without the design data of the free-form surface.
  • the pressure pad of the present application can alleviate dimensional errors. As a result of being released from excessive dimensional control, the product manufacturing process can be simplified.

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

Abstract

La présente invention concerne un tampon de pression qui est facile à produire et peut simplifier le processus de production d'une structure en sandwich à âme en nid d'abeille. Un tampon de pression (10) selon la présente invention présente une forme qui correspond à un produit (2), et comprend une partie de surface supérieure (11), une partie de surface latérale (12) et une partie périphérique (13). Le tampon de pression (10) est pourvu d'un corps principal de tampon de pression (16), d'un film de démoulage (17) et de coques internes (18, 19). Le corps principal de tampon de pression (16) est composé de caoutchouc synthétique sans silicone. Une première coque interne (18) est introduite dans une position qui traverse la partie inférieure de la partie de surface latérale (12) et la partie périphérique (13), et est constituée d'une matière plastique renforcée par des fibres qui contient une résine thermoplastique ; et la résine thermoplastique est ramollie à une température relativement basse. Une deuxième coque interne (19) est introduite dans une position qui correspond à la partie de surface supérieure, et est constituée d'une matière plastique renforcée par des fibres qui contient une résine thermoplastique ; et la résine thermoplastique est ramollie à une température relativement élevée.
PCT/JP2019/008401 2019-03-04 2019-03-04 Tampon de pression, procédé de production de tampon de pression et procédé de production de structure en sandwich à âme en nid d'abeille WO2020178950A1 (fr)

Priority Applications (2)

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PCT/JP2019/008401 WO2020178950A1 (fr) 2019-03-04 2019-03-04 Tampon de pression, procédé de production de tampon de pression et procédé de production de structure en sandwich à âme en nid d'abeille
JP2019521165A JP6570160B1 (ja) 2019-03-04 2019-03-04 圧力パッド、圧力パッドの製造方法およびハニカムコアサンドイッチ構造体の製造方法

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PCT/JP2019/008401 WO2020178950A1 (fr) 2019-03-04 2019-03-04 Tampon de pression, procédé de production de tampon de pression et procédé de production de structure en sandwich à âme en nid d'abeille

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CN110815874B (zh) * 2019-11-21 2021-06-25 航天特种材料及工艺技术研究所 具有收口结构的工字形复合材料构件的成型模具及方法
CN113043684A (zh) * 2021-04-13 2021-06-29 中国航空制造技术研究院 用于成型碳纤维复合材料导流壳体的压力垫及其制备方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08506534A (ja) * 1992-12-23 1996-07-16 ユナイテッド テクノロジーズ コーポレイション 低密度の、安定化した傾斜形ハニカムコアを使用して、傾斜面を有する軽量のハニカムコア複合製品を高圧共硬化成形する複合成形装置、および成形方法、ならびにそれによって製造した製品
JP2002225210A (ja) * 2001-02-05 2002-08-14 Kawasaki Heavy Ind Ltd 複合材サンドイッチ構造体及びその製造方法、補修方法
JP2004181758A (ja) * 2002-12-03 2004-07-02 Fuji Heavy Ind Ltd 複合材の成形治具
JP2005047180A (ja) * 2003-07-30 2005-02-24 Fuji Heavy Ind Ltd ハニカムサンドイッチパネルの製造方法
JP2010510111A (ja) * 2006-11-20 2010-04-02 ザ・ボーイング・カンパニー 熱膨張ツーリングコールを使用してハット型に強化された複合部品を形成する装置及び方法
JP2013248848A (ja) * 2012-06-04 2013-12-12 Jamco Corp 複合材ストリンガーの連続プリフォーム装置

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100320515B1 (ko) * 1999-10-11 2002-01-15 이계안 실리콘 고무를 이용한 금형 제조 방법

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08506534A (ja) * 1992-12-23 1996-07-16 ユナイテッド テクノロジーズ コーポレイション 低密度の、安定化した傾斜形ハニカムコアを使用して、傾斜面を有する軽量のハニカムコア複合製品を高圧共硬化成形する複合成形装置、および成形方法、ならびにそれによって製造した製品
JP2002225210A (ja) * 2001-02-05 2002-08-14 Kawasaki Heavy Ind Ltd 複合材サンドイッチ構造体及びその製造方法、補修方法
JP2004181758A (ja) * 2002-12-03 2004-07-02 Fuji Heavy Ind Ltd 複合材の成形治具
JP2005047180A (ja) * 2003-07-30 2005-02-24 Fuji Heavy Ind Ltd ハニカムサンドイッチパネルの製造方法
JP2010510111A (ja) * 2006-11-20 2010-04-02 ザ・ボーイング・カンパニー 熱膨張ツーリングコールを使用してハット型に強化された複合部品を形成する装置及び方法
JP2013248848A (ja) * 2012-06-04 2013-12-12 Jamco Corp 複合材ストリンガーの連続プリフォーム装置

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