WO2021075375A1 - Corps moulé et méthode de production de corps moulé - Google Patents

Corps moulé et méthode de production de corps moulé Download PDF

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Publication number
WO2021075375A1
WO2021075375A1 PCT/JP2020/038299 JP2020038299W WO2021075375A1 WO 2021075375 A1 WO2021075375 A1 WO 2021075375A1 JP 2020038299 W JP2020038299 W JP 2020038299W WO 2021075375 A1 WO2021075375 A1 WO 2021075375A1
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WIPO (PCT)
Prior art keywords
reinforcing member
core material
molded product
product according
molded body
Prior art date
Application number
PCT/JP2020/038299
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English (en)
Japanese (ja)
Inventor
吉田　攻一郎
Original Assignee
キョーラク株式会社
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
Priority claimed from JP2019188988A external-priority patent/JP7239831B2/ja
Priority claimed from JP2019188990A external-priority patent/JP7239832B2/ja
Application filed by キョーラク株式会社 filed Critical キョーラク株式会社
Publication of WO2021075375A1 publication Critical patent/WO2021075375A1/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
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/12—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor of articles having inserts or reinforcements
    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • 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
    • B32B5/18—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 features of a layer of foamed material
    • 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 molded product and a method for manufacturing the molded product.
  • molded bodies used for interior materials in vehicle interiors have been manufactured.
  • a sandwich panel in which a skin member, which is a resin sheet, is arranged on both sides of a core material is often used.
  • Patent Document 1 discloses an example of a sandwich panel.
  • such a molded body (sandwich panel) has a problem that its strength becomes weaker when it is enlarged.
  • a plurality of core materials may be used and a metal reinforcing member may be inserted between adjacent core materials like a splint (for example, as shown in FIG. 7), but in such a case.
  • a metal reinforcing member may be inserted between adjacent core materials like a splint (for example, as shown in FIG. 7), but in such a case.
  • the present invention has been made in view of such circumstances, and an object of the present invention is to provide a molded body that is lightweight while ensuring strength, and a method for manufacturing the molded body.
  • Another object of the present invention is to provide a molded product that suppresses the elongation of the epidermis member that may occur with the passage of time and has less risk of bending, and a method for producing the molded product.
  • the present invention is a panel-shaped molded body, which includes a core material, a reinforcing member, and a skin member, and the reinforcing member is formed in a sheet or tape shape, and the surface of the core material is formed.
  • the skin member is a resin sheet, which is configured to be attached to at least a part of the back surface, and is provided on both sides of the core material.
  • the panel-shaped molded body includes a core material, a skin member, and a reinforcing member
  • the skin member is a resin sheet, which is a core material.
  • FIG. 3 is a cross-sectional view of the molded body 1 according to the first embodiment.
  • FIG. 3 is a plan view of an insert member 15 in which a reinforcing member 13 is attached to a core material 12.
  • a mode of a molding machine 3 for manufacturing a molded body 1. A mode in which the dies 71 and 72 are opened in the production of the molded body 1.
  • the plan view of the molded body 1 (insert member 15) which concerns on a modification.
  • FIG. 3 is a cross-sectional view of a molded body 9 according to a comparative example. It is sectional drawing which shows the structure of the molded body 101 which concerns on 2nd Embodiment.
  • FIG. 3 is a cross-sectional view of a molded body 9 according to a comparative example. It is sectional drawing which shows the structure of the molded body 101 which concerns on 2nd Embodiment.
  • FIG. 8 is an exploded cross-sectional view of FIG. It is a top view of the insert member 115 formed by temporarily fastening a reinforcing member 113 to a core material 112.
  • the aspect of the molding machine 3 for manufacturing a molded body 101 is shown. In the production of the molded body 101, the molds 71 and 72 are opened. In the production of the molded body 101, the molds 71 and 72 are closed.
  • FIG. 1 is a cross-sectional view showing the structure of the molded body 1.
  • FIG. 2 is a plan view of the insert member 15 in which the reinforcing member 13 is attached to the core material 12.
  • the panel-shaped molded body 1 includes skin members 11a and 11b, a core member 12, and a reinforcing member 13.
  • skin members 11a and 11b As shown in FIG. 1, the panel-shaped molded body 1 includes skin members 11a and 11b, a core member 12, and a reinforcing member 13.
  • each configuration will be described in detail.
  • the skin members 11a and 11b are resin sheets and are arranged on both sides of the core material 12 described later.
  • a knitted fabric, a woven fabric, a non-woven fabric, or a polyvinyl chloride (PVC) obtained by processing natural fibers, regenerated fibers, semi-synthetic fibers, synthetic fibers, and fibers obtained by mixing these.
  • thermoplastic elastomer such as thermoplastic polyurethane elastomer (TPU) or thermoplastic polyolefin elastomer (TPO), resin sheet made of thermoplastic resin such as polyethylene polyolefin resin, and laminated sheets thereof, plastic cardboard, It can be appropriately selected from a hard board or the like.
  • the core material 12 is made of, for example, a foam of a thermoplastic resin, and it is desirable that polyethylene, polypropylene, polystyrene or the like is appropriately adopted as the thermoplastic resin. Further, a filler such as glass fiber, carbon fiber, calcium carbonate, talc, or mica can be appropriately added to the foam.
  • the core material 12 is a foam produced by so-called bead foam molding.
  • bead foam molding The features of bead foam molding are that the shape can be freely designed and that a high-magnification foam molded product can be obtained.
  • the bead foam molding process is divided into pre-foaming, aging, molding and curing.
  • the beads used for bead foam molding are small-diameter resin particles impregnated with a physical foaming agent such as a hydrocarbon.
  • polystyrene particles containing a foaming agent can be obtained by allowing a hydrocarbon (pentane or the like) as a foaming agent to be present in the polymerization system during suspension polymerization.
  • a hydrocarbon penentane or the like
  • the mini pellets prepared in advance are impregnated with hydrocarbons in water.
  • Examples of the foaming agent that can be used for forming the core material 12 include known physical foaming agents, chemical foaming agents, and mixtures thereof.
  • the physical foaming agent an inorganic physical foaming agent such as air, carbon dioxide gas, nitrogen gas, and an organic physical foaming agent such as butane, pentane, hexane, dichloromethane, and dichloroethane can be applied.
  • the chemical foaming agent include azodicarboxylic amide (ADCA), N, N'-dinitrosopentamethylenetetramine, 4,4'-oxybis (benzenesulfonylhydrazide), and diphenylsulfone-3,3'-disulfonyl.
  • Organic foaming agents such as hydrazide, p-toluenesulfonyl semicarbazide, trihydrazinotriazine or azobisisobutyronitrile, citric acid, oxalic acid, fumaric acid, phthalic acid, malic acid, tartaric acid, cyclohexane-1,2-dicarboxylic acid ,
  • a mixture of polycarboxylic acids such as gyonoic acid, ethylenediamine tetraacetic acid, triethylenetetramine hexaacetic acid and nitriloic acid and inorganic carbonate compounds such as sodium hydrogen carbonate, sodium hydrogen carbonate aluminum, potassium hydrogen carbonate, ammonium hydrogen carbonate and ammonium carbonate , Salts of polycarboxylic acids such as sodium dihydrogen citrate and potassium oxalate can be mentioned as inorganic foaming agents.
  • the insert member 15 is formed by attaching the reinforcing member 13 described later to the core material 12 via the adhesive layer 14. It is preferable that the core material 12 has a recess 12A for attaching the reinforcing member 13, and the reinforcing member 13 is housed in the recess 12A provided in the core material 12. The insert member 15 will be described again in the method for manufacturing the molded body 1 in Section 2.
  • the reinforcing member 13 contains glass fiber reinforced plastic or carbon fiber reinforced plastic, or it is preferable to use these. Since the fiber reinforced plastic is used, it contributes to weight reduction as compared with the case where the metal reinforcing member 93 shown in FIG. 7 is used.
  • the reinforcing member 13 is configured to be attached to at least a part of the front surface or the back surface of the core material 12, and may be formed in the form of a sheet or tape.
  • FIGS. 1 and 2 an example is shown in which the reinforcing member 13 is configured to be attached to both the front surface and the back surface of the core material 12, and the reinforcing member 13 is formed in an elongated tape shape.
  • recesses 121 are provided on the front surface and the back surface of the core material 12, and a tape-shaped reinforcing member 13 is attached thereto. Since it is formed in a tape shape in this way, weight reduction is expected as compared with the case where the metal reinforcing member 93 shown in FIG. 7 is adopted.
  • the molded body 9 (comparative example) shown in FIG. 7 includes skin members 91a and 91b, a core member 92, and an H-shaped reinforcing member 93 (so-called reinforce). Since the reinforcing member 93 of the molded body 9 has a metal reinforcing member 93 inserted between two adjacent core members 92 like a splint, the weight increases.
  • the reinforcing member 13 is attached along the center line X on the surface of the core material 12.
  • An adhesive or the like is used for such affixing.
  • the core material 12 and the reinforcing member 13 are adhered to each other via the adhesive layer 14.
  • the rigidity of the reinforcing member 13 directly affects the core material 12, and the strength of the core material 12 which is relatively soft as compared with the reinforcing member 13 can be strengthened.
  • the strength of the molded product 1 can be increased while maintaining the light weight.
  • the reinforcing member 13 is a UD (Uni-Direction) sheet or a UD tape.
  • UD Uni-Direction
  • UD tape are sheets or tapes in which fibers are aligned in one direction and impregnated with a thermoplastic resin.
  • the UD sheet or UD tape is a fiber reinforced plastic using long fibers and has high tensile strength in the direction in which the fibers are oriented. As a result, the strength of the molded product 1 can be remarkably increased.
  • the tensile elastic modulus of the reinforcing member 13 is preferably 12 GPa or more and 400 GPa or less. Specifically, for example, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34,35,36,37,38,39,40,50,60,70,80,90,100,110,120,130,140,150,160,170,180,190,200,210,220, It is 230, 240, 250, 260, 270, 280, 290, 300, 310, 320, 330, 340, 350, 360, 370, 380, 390, 400 GPa, and is between any two of the numerical values exemplified here. It may be within the range.
  • the thickness of the core material 12 is t1 and the thickness of the reinforcing member 13 is t2, it is preferable that 0.01 ⁇ t2 / t1 ⁇ 0.3 is satisfied (see FIG. 1).
  • the reinforcing member 13 is in the form of a sheet or a tape, and when preparing the insert member 15, it is preferable that the reinforcing member 13 is thin enough to be easily attached by an operator.
  • the value of t2 / t1 is 0.01,0.015,0.02,0.025,0.03,0.035,0.04,0.045,0.05,0.
  • the width of the core material 12 is w1 and the width of the reinforcing member 13 is w2, it is preferable that 0.05 ⁇ w2 / w1 ⁇ 0.95 is satisfied (see FIG. 2).
  • the value of w2 / w1 is 0.05, 0.06, 0.07, 0.08, 0.09, 0.1, 0.11, 0.12, 0.13, 0.
  • FIG. 3 shows an aspect of a molding machine 3 for manufacturing a molded body 1.
  • FIG. 4 shows a mode in which the molds 71 and 72 are opened in the production of the molded product 1.
  • FIG. 5 shows a mode in which the molds 71 and 72 are closed in the production of the molded product 1.
  • the molding machine 3 includes a resin supply device 4, a T-die 5, and a pair of molds 71 and 72.
  • the resin supply device 4 includes a hopper 41, an extruder 42, and an accumulator 45.
  • the extruder 42 and the accumulator 45 are connected via a connecting pipe 61.
  • the accumulator 45 and the T-die 5 are connected via a connecting pipe 62.
  • the hopper 41 is used to put the raw material resin M1 into the cylinder 43 of the extruder 42.
  • the form of the raw material resin M1 is not particularly limited, but is usually in the form of pellets.
  • the raw material resin M1 is charged into the cylinder 43 from the hopper 41 and then melted by being heated in the cylinder 43 to become a molten resin. Further, it is conveyed toward the tip of the cylinder 43 by the rotation of the screw arranged in the cylinder 43.
  • the screw is arranged in the cylinder 43, and the molten resin is kneaded and conveyed by its rotation.
  • a gear device is provided at the base end of the screw, and the screw is rotationally driven by the gear device.
  • the number of screws arranged in the cylinder 43 may be one or two or more.
  • the melt-kneaded resin M2 is extruded from the resin extrusion port of the cylinder 43 and injected into the accumulator 45 through the connecting pipe 61.
  • the accumulator 45 includes a cylinder 46 and a piston 47 slidable inside the cylinder 46, so that the molten resin M2 can be stored in the cylinder 46. Then, by moving the piston 47 after a predetermined amount of the resin M2 is stored in the cylinder 46, the resin M2 is pushed out from the slit provided in the T die 5 through the connecting pipe 62 and hung down to form a pair of resin sheets 21. , 22 is formed.
  • the pair of resin sheets 21 and 22 are guided between the pair of molds 71 and 72.
  • the pair of dies 71 and 72 are each provided with a large number of decompression suction holes (not shown), and the resin sheets 21 and 22 are decompressed and suctioned to form a shape along the pair of dies 71 and 72. It is possible to do.
  • the molds 71 and 72 have a shape having recesses 71c and 72c, and pinch-off portions 71p and 72p are provided so as to surround the recesses 71c and 72c. In the mold clamping step described later, the resin sheets 21 and 22 are cut off by the pinch-off portions 71p and 72p.
  • the manufacturing method of the molded product 1 includes a preparation step, a hanging step, an arrangement step, and a molding step.
  • a preparation step a preparation step
  • a hanging step a hanging step
  • an arrangement step a molding step.
  • the reinforcing member 13 is attached to at least a part of the surface of the core material 12. Specifically, as shown in FIG. 2, a reinforcing member 13 containing a fiber reinforced plastic is adhered (adhered) to at least one of the front surface and the back surface of the panel-shaped core material 12 which is a foam. By sticking (via the layer 14), the insert member 15 is configured.
  • the two molten resin sheets are hung between the pair of molds 71 and 72.
  • the reinforcing member 13 is attached to the core material 12 by the adhesive layer 14, and the insert member 15 prepared in the preparatory step is arranged between the pair of molds 71 and 72.
  • two resin sheets 21 and 22 are hung on both sides of the insert member 15.
  • a pair of resin sheets 21 and 22 formed by extruding the molten resin M2 from the slit of the T die 5 and hanging the resin sheets 21 and 22 are hung.
  • direct vacuum forming is performed using the pair of resin sheets 21 and 22 extruded from the T die 5 as they are, so that the pair of resin sheets 21 and 22 are cooled to room temperature and solidified before molding.
  • the solidified pair of resin sheets 21 and 22 are not heated before molding.
  • the insert member 15 is shown between the pair of resin sheets 21 and 22 during the hanging step, but in the hanging step, the insert member 15 may be kept on standby at another place. Good.
  • the pair of dies 71 and 72 are molded and then opened, so that the two resin sheets become the skin members 11a and 11b to manufacture the molded body 1.
  • the pair of molds 71 and 72 are molded. That is, the insert member 15 is arranged at a position sandwiched between the two resin sheets 21 and 22. As a result, the resin sheets 21 and 22 become the skin members 11a and 11b in the molded body 1 shown in FIG.
  • the molded product 1 shown in FIG. 5 is obtained.
  • Modification Example Section 3 describes a modification of the molded body 1. That is, the molded body 1 or the molded body 1 may be carried out according to the following aspects.
  • the molded body 1 has a panel shape, it does not necessarily have to be a rectangular parallelepiped shape.
  • the molded body 1 core material 12 forming the insert member 15
  • the molded body 1 may be configured to further include the eggplant 12s.
  • the reinforcing member 13 is attached to the core material 12 so as to avoid the shavings 12s.
  • the number, arrangement, shape, etc. of the reinforcing member 13 are not limited. Various examples are shown below. Of course, it is not limited to these. (1) Two may be attached at a position away from the center line X of the core material 12. (2) It may be attached along the two diagonal lines of the core material 12. (3) Although the tape-shaped reinforcing member 13 is attached in the longitudinal direction in FIG. 2, the reinforcing member 13 may be attached in place of or together with the reinforcing member 13 in the lateral direction. (4) In FIG. 2, the reinforcing member 13 is shorter than the length of the core material 12 in the longitudinal direction, but the lengths of the core material 12 and the reinforcing member 13 may be the same.
  • the core material 12 may be a honeycomb structure instead of the foam formed by bead foam molding.
  • the reinforcing member is formed in an elongated tape shape and is attached along the center line on the surface of the core material.
  • the thickness of the core material is t1 and the thickness of the reinforcing member is t2, 0.01 ⁇ t2 / t1 ⁇ 0.3 is satisfied.
  • the width of the core material is w1 and the width of the reinforcing member is w2, 0.05 ⁇ w2 / w1 ⁇ 0.95 is satisfied.
  • the reinforcing member includes glass fiber reinforced plastic or carbon fiber reinforced plastic.
  • the tensile elastic modulus of the reinforcing member is 12 GPa or more and 400 GPa or less.
  • the reinforcing member is configured to be attached to both the front surface and the back surface of the core material.
  • the core material has a recess for attaching the reinforcing member, and the reinforcing member is housed in the recess.
  • one further provided with a shaving in the molded product.
  • the method for manufacturing a molded product includes a preparation step, a hanging step, an arrangement step, and a molding step. In the preparation step, the reinforcing member is attached to at least a part of the surface of the core material.
  • the hanging step two molten resin sheets are hung between a pair of molds, and in the placement step, the core material and the reinforcing member are placed between the two resin sheets, and the molding step is performed. Then, a method of manufacturing the molded body in which the two resin sheets serve as the skin member by molding the pair of molds and then opening the molds. Of course, this is not the case.
  • FIG. 8 is a cross-sectional view showing the structure of the molded body 1.
  • FIG. 9 is an exploded cross-sectional view of FIG.
  • FIG. 10 is a plan view of the insert member 115 formed by temporarily fixing the reinforcing member 113 to the core material 112.
  • the panel-shaped molded body 101 includes a skin member 111, a core member 112, and a reinforcing member 113.
  • a skin member 111 As shown in FIGS. 8 and 9, the panel-shaped molded body 101 includes a skin member 111, a core member 112, and a reinforcing member 113.
  • a core member 112 As shown in FIGS. 8 and 9, the panel-shaped molded body 101 includes a skin member 111, a core member 112, and a reinforcing member 113.
  • the skin member 111 is a resin sheet, and is arranged on both sides of the core material 112, which will be described later, to form the appearance of the molded body 101.
  • the outer surface 211 of the skin member 111 is visually recognized.
  • the reinforcing member 113 is integrally welded to the inner surface 212 of the skin member 111.
  • the material of the skin member 111 the same material as that of the skin member 11 of the first embodiment can be used.
  • Core material 112 As the core material 112, the same core material 12 as that of the first embodiment can be used.
  • the insert member 115 is formed by temporarily fixing the reinforcing member 113, which will be described later, to the core material 112 with the double-sided tape 114. It should be noted that this is only temporary fastening at the time of manufacturing, and as described above, the reinforcing member 113 is integrally welded to the inner surface 212 of the skin member 111. The insert member 115 will be described again in the method for manufacturing the molded body 101 in Section 2.
  • the reinforcing member 113 contains glass fiber reinforced plastic or carbon fiber reinforced plastic, or it is preferable to use these. Since the fiber reinforced plastic is used, a lightweight molded body 1 can be realized.
  • the reinforcing member 113 is formed in the form of a sheet or tape. It should be noted that the reinforcing member 113 has thermoplasticity, and the surface 231 of the reinforcing member 113 is integrally welded to at least a part of the inner surface 212 of the skin member 111. On the other hand, the reinforcing member 113 is configured such that its back surface 232 is temporarily fastened on both the front surface and the back surface of the core material 112. Note that FIG. 10 shows an example in which the reinforcing member 113 is formed in the shape of an elongated tape. Since it is formed in a tape shape in this way, a lightweight molded body 101 can be manufactured.
  • the back surface 232 of the reinforcing member 113 is temporarily fastened to the core material 112 along the center line X on the front surface of the core material 112.
  • the reinforcing member 113 is integrally welded to the skin member 111, the rigidity of the reinforcing member 113 directly affects the skin member 111, and the strength of the skin member 111, which is relatively easy to stretch as compared with the reinforcing member 113, is strengthened. can do.
  • the elongation of the skin member 111 in the fiber direction can be suppressed, and the deflection of the molded body 101 that may occur with the passage of time can be reduced, which is an advantageous effect.
  • the reinforcing member 113 is a UD (Uni-Direction) sheet or a UD tape.
  • UD Uni-Direction
  • UD tape are sheets or tapes in which fibers are aligned in one direction and impregnated with a thermoplastic resin.
  • the UD sheet or UD tape is a fiber reinforced plastic using long fibers and has high tensile strength in the direction in which the fibers are oriented. As a result, the elongation of the skin member 111 in the fiber direction can be remarkably suppressed.
  • the tensile elastic modulus of the reinforcing member 113 is the same as that of the reinforcing member 13 of the first embodiment.
  • the thickness of the core material 112 is t1 and the thickness of the reinforcing member 113 is t2, it is preferable that 0.01 ⁇ t2 / t1 ⁇ 0.3 is satisfied (see FIG. 8).
  • the reinforcing member 113 is in the form of a sheet or a tape, and when preparing the insert member 115, it is preferable that the reinforcing member 113 is thin enough to be easily temporarily fastened by an operator.
  • the value of t2 / t1 is 0.01,0.015,0.02,0.025,0.03,0.035,0.04,0.045,0.05,0.
  • the width of the core material 112 is w1 and the width of the reinforcing member 113 is w2, it is preferable that 0.05 ⁇ w2 / w1 ⁇ 0.95 is satisfied (see FIG. 10).
  • This is a trade-off with cost, and if the effect of preventing deflection is desired to be high, the value of w2 / w1 should be relatively high, and if cost reduction is considered, the value of w2 / w1 should be relatively low. You should do it.
  • the value of w2 / w1 is 0.05, 0.06, 0.07, 0.08, 0.09, 0.1, 0.11, 0.12, 0.13, 0.
  • FIG. 11 shows an aspect of the molding machine 3 for manufacturing the molded body 101.
  • FIG. 12 shows a mode in which the molds 71 and 72 are opened in the production of the molded product 101.
  • FIG. 13 shows a mode in which the molds 71 and 72 are closed in the production of the molded product 101.
  • the manufacturing method of the molded product 101 includes a preparation step, a hanging step, an arrangement step, and a molding step.
  • a preparation step a preparation step
  • a hanging step a hanging step
  • an arrangement step a molding step.
  • the reinforcing member 113 is temporarily fastened to at least a part of both sides of the core material 112. Specifically, as shown in FIG. 10, by temporarily fixing the reinforcing member 113 containing the fiber reinforced plastic to at least one of the front surface and the back surface of the panel-shaped core material 112 which is a foam, with double-sided tape 114. , The insert member 115 is configured.
  • the two molten resin sheets 21 and 22 are hung between the pair of molds 71 and 72.
  • the insert member 115 prepared in the preparation step is arranged between the pair of molds 71 and 72, and further, as shown in FIG. 12, both sides of the insert member 115. Two resin sheets 21 and 22 are hung down.
  • FIG. 411 illustrates the insert member 115 between the pair of resin sheets 21 and 22 during the hanging step, but in the hanging step, the insert member 115 may be kept waiting at another place. Good.
  • the pair of dies 71 and 72 are molded and then opened, so that the two resin sheets 21 and 22 become the skin member 111 and the reinforcing member 113 becomes the skin member 111.
  • the molded body 101 is manufactured by being integrally welded to the molded body 101. Specifically, as shown in FIG. 13, the pair of molds 71 and 72 are molded. That is, the insert member 115 is arranged at a position sandwiched between the two resin sheets 21 and 22. As a result, the resin sheets 21 and 22 become the skin member 111 in the molded body 101 shown in FIG.
  • the surface 231 of the thermoplastic reinforcing member 113 is welded to the inner surface 212 of the skin member 111 and integrated. Finally, by taking out the molded product from the pair of molds 71 and 72 and removing the burr 25, the molded product 101 shown in FIG. 13 is obtained.
  • Modification Example Section 3 describes a modification of the molded body 101. That is, the molded body 101 or the molded body 101 may be carried out according to the following aspects.
  • the reinforcing member 113 is integrally welded to the skin member 111
  • the number, arrangement, shape, etc. of the reinforcing member 113 are not limited. Various examples are shown below. Of course, it is not limited to these.
  • the two reinforcing members 113 may be integrally welded to the skin member 111 at a position away from the center line X of the core material 112.
  • Two reinforcing members 113 may be integrally welded to the skin member 111 along the two diagonal lines of the core material 112.
  • the tape-shaped reinforcing member 113 is temporarily fastened and integrally welded in the longitudinal direction, but instead of or together with this, the reinforcing member 113 is temporarily fastened and integrally welded in the lateral direction. May be transformed.
  • the length of the core material 112 and the length of the reinforcing member 113 are substantially the same in the longitudinal direction, but the length of the reinforcing member 113 is larger than the length of the core material 112. The length may be shortened. However, it should be noted that the effect of preventing deflection is lower than that of the same.
  • the core material 112 may be a honeycomb structure instead of the foam formed by bead foam molding.
  • the double-sided tape 114 is only an example for temporarily fixing the reinforcing member 113 to the core material 112, and the adhesive or the curing tape may be attached from above to temporarily fix the reinforcing member 113.
  • the reinforcing member is formed in an elongated tape shape and integrally welded to the skin member along the center line of the core material.
  • the thickness of the core material is t1 and the thickness of the reinforcing member is t2, 0.01 ⁇ t2 / t1 ⁇ 0.3 is satisfied.
  • the width of the core material is w1 and the width of the reinforcing member is w2, 0.05 ⁇ w2 / w1 ⁇ 0.95 is satisfied.
  • the reinforcing member includes glass fiber reinforced plastic or carbon fiber reinforced plastic.
  • the tensile elastic modulus of the reinforcing member is 12 GPa or more and 400 GPa or less.
  • the reinforcing member is configured to be temporarily fastened on both the front surface and the back surface of the core material.
  • the method for manufacturing a molded product includes a preparation step, a hanging step, an arrangement step, and a molding step.
  • the preparation step the reinforcing member is temporarily fastened to at least a part of both sides of the core material.
  • the hanging step two molten resin sheets are hung between a pair of molds, and in the arrangement step, the core material and the reinforcement temporarily fastened to the core material are placed between the two resin sheets.

Abstract

Le problème décrit par la présente invention est de fournir un corps moulé qui est léger tout en étant résistant et une méthode de production de corps moulé. L'invention concerne : un corps moulé dans lequel l'étirement d'un élément de revêtement qui peut se produire au fil du temps est supprimé et dans lequel le risque de déviation est moindre ; et une méthode de production de corps moulé. Selon un aspect, la présente invention concerne un corps moulé de type panneau comprenant un matériau de noyau, un élément de renforcement, et des éléments de revêtement, l'élément de renforcement étant formé en une feuille ou une bande et étant configuré de façon à être collé sur au moins une section d'une surface avant ou d'une surface arrière du matériau de noyau, et les éléments de revêtement étant des feuilles de résine et étant disposés sur les deux surfaces du matériau de noyau. Selon un autre aspect, la présente invention concerne un corps moulé de type panneau comprenant un matériau de noyau, des éléments de revêtement, et un élément de renforcement, les éléments de revêtement étant des feuilles de résine et étant disposés sur les deux surfaces du matériau de noyau pour constituer l'apparence du corps moulé, et l'élément de renforcement étant formé en une feuille ou une bande, ayant une thermoplasticité, et étant soudé d'un seul tenant sur au moins une section de surfaces internes des éléments de revêtement.
PCT/JP2020/038299 2019-10-15 2020-10-09 Corps moulé et méthode de production de corps moulé WO2021075375A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2019188988A JP7239831B2 (ja) 2019-10-15 2019-10-15 成形体、及び成形体の製造方法
JP2019-188988 2019-10-15
JP2019-188990 2019-10-15
JP2019188990A JP7239832B2 (ja) 2019-10-15 2019-10-15 成形体、及び成形体の製造方法

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001146506A (ja) * 1999-09-06 2001-05-29 Nippon Shokubai Co Ltd 樹脂シートおよびこれを用いた成形品
JP2014098127A (ja) * 2012-11-16 2014-05-29 Mitsubishi Rayon Co Ltd 炭素繊維強化複合成形品およびその製造方法
WO2018221484A1 (fr) * 2017-05-29 2018-12-06 キョーラク株式会社 Panneau en résine et son procédé de fabrication, ainsi que structure et son procédé de fabrication

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001146506A (ja) * 1999-09-06 2001-05-29 Nippon Shokubai Co Ltd 樹脂シートおよびこれを用いた成形品
JP2014098127A (ja) * 2012-11-16 2014-05-29 Mitsubishi Rayon Co Ltd 炭素繊維強化複合成形品およびその製造方法
WO2018221484A1 (fr) * 2017-05-29 2018-12-06 キョーラク株式会社 Panneau en résine et son procédé de fabrication, ainsi que structure et son procédé de fabrication

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