WO2019203194A1 - 中空構造体及びその製造方法 - Google Patents

中空構造体及びその製造方法 Download PDF

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Publication number
WO2019203194A1
WO2019203194A1 PCT/JP2019/016186 JP2019016186W WO2019203194A1 WO 2019203194 A1 WO2019203194 A1 WO 2019203194A1 JP 2019016186 W JP2019016186 W JP 2019016186W WO 2019203194 A1 WO2019203194 A1 WO 2019203194A1
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WO
WIPO (PCT)
Prior art keywords
layer
hollow structure
sheet material
thickness direction
bulging
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2019/016186
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English (en)
French (fr)
Japanese (ja)
Inventor
隆志 木村
晋吾 柴垣
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gifu Plastic Industry Co Ltd
Original Assignee
Gifu Plastic Industry Co Ltd
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 Gifu Plastic Industry Co Ltd filed Critical Gifu Plastic Industry Co Ltd
Publication of WO2019203194A1 publication Critical patent/WO2019203194A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • B29C51/10—Forming by pressure difference, e.g. vacuum
    • 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
    • B29C51/18—Thermoforming apparatus
    • B29C51/20—Thermoforming apparatus having movable moulds or mould parts
    • B29C51/22—Thermoforming apparatus having movable moulds or mould parts rotatable about an axis
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/04—Dielectric heating, e.g. high-frequency welding, i.e. radio frequency welding of plastic materials having dielectric properties, e.g. PVC
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/06—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using friction, e.g. spin welding
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B29C65/20—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools with direct contact, e.g. using "mirror"
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/52—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the way of applying the adhesive
    • B29C65/54—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the way of applying the adhesive between pre-assembled parts
    • 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

Definitions

  • the present invention relates to a hollow structure and a manufacturing method thereof.
  • Patent Document 1 describes an invention relating to a honeycomb structure having a hollow structure.
  • the honeycomb structure described in Patent Document 1 is formed by plastically deforming a synthetic resin sheet to form a sheet material having an uneven shape, and then folding the sheet material.
  • a honeycomb structure has a plurality of partition walls (side walls) that partition a plurality of cells, and two blocking walls that respectively block both ends of the plurality of cells.
  • Some of the plurality of partition walls have a two-layer structure, and the two blocking walls also have a two-layer structure.
  • the shape of the folded sheet material is maintained, and more specifically, the planar tool used in the folding process is heated to configure each blocking wall. It discloses that the two layers are thermally welded together.
  • the plate-like honeycomb structure includes a plurality of hollow cells arranged in a direction orthogonal to the thickness direction. Such a plate-like honeycomb structure may not have sufficient strength against bending applied in the thickness direction.
  • a honeycomb structure having a two-layer structure partition wall as described in Patent Document 1 there is a case in which a fold starting from the two-layer structure partition wall may occur, and there is still room for improvement in terms of bending strength. There is something.
  • An object of the present invention is to provide a hollow structure excellent in bending strength.
  • the hollow structure that solves the above-described problems is formed by folding a sheet material made of a synthetic resin that has been formed to have a predetermined uneven shape.
  • the hollow structure includes a plurality of partition walls extending in a thickness direction of the hollow structure and partitioning a plurality of cells arranged inside the hollow structure.
  • Part of the plurality of partition walls has a two-layer structure including a first layer and a second layer.
  • the first layer and the second layer are bonded to each other through a bonding portion at least at each intermediate portion in the thickness direction, and the bonding portion is an adhesion portion or a welding portion.
  • the intermediate portion in the thickness direction refers to a portion excluding both end edges in the thickness direction.
  • the hollow structure that solves the above-described problems is formed by folding a sheet material made of a synthetic resin that has been formed to have a predetermined uneven shape.
  • the hollow structure includes a plurality of partition walls extending in a thickness direction of the hollow structure and partitioning a plurality of cells arranged inside the hollow structure.
  • a part of the partition wall has a two-layer structure including a first layer and a second layer in which both end edges in the thickness direction are joined to each other. The first layer and the second layer are joined to each other by adhesion or welding at least at each intermediate portion in the thickness direction.
  • the method for solving the above problem is a method for manufacturing a hollow structure in which a plurality of cells are partitioned.
  • the hollow structure includes a plurality of partition walls that extend in the thickness direction of the hollow structure and partition the plurality of cells.
  • the plurality of partition walls have a two-layer structure including a first layer and a second layer.
  • the manufacturing method includes forming a sheet material made of synthetic resin so as to have a predetermined uneven shape, forming a joint portion on the sheet material, and folding the sheet material. The folding includes joining the first layer and the second layer to each other via the joint at least in each intermediate portion in the thickness direction.
  • a method for solving the above problem is a method for manufacturing a hollow structure in which a plurality of cells are partitioned, and the hollow structure extends in the thickness direction of the hollow structure to partition the plurality of cells.
  • the plurality of partition walls have a two-layer structure including a first layer and a second layer.
  • the manufacturing method is to form a sheet material made of synthetic resin so as to have a predetermined uneven shape and to form an intermediate body by folding the sheet material, and the intermediate bodies abut against each other.
  • the first layer and the second layer have the plurality of partition walls constituting the two-layer structure, and the first layer and the second layer are mutually connected at least in an intermediate portion in the thickness direction. Joining.
  • FIG. 1 is a perspective view of the hollow structure of the present embodiment
  • (b) is a sectional view taken along line 1B-1B in (a)
  • (c) is a sectional view taken along line 1C-1C in (a).
  • (A) is a perspective view of a sheet material
  • (b) is a perspective view showing a state in the middle of folding of the sheet material of FIG. 2 (a)
  • (c) shows a state of folding the sheet material of FIG. 2 (b).
  • Perspective view which shows an example of a manufacturing apparatus. The figure explaining the junction part of the hollow structure of Fig.1 (a).
  • the schematic diagram which shows the example of a change of a manufacturing apparatus.
  • (A) is a perspective view of the sheet material which comprises the core layer of a modification
  • (b) is a perspective view which shows the state in the middle of folding of the sheet material of FIG. 6 (a)
  • (c) is FIG.6 (b).
  • (A)-(f) is a figure explaining the example of a change of a junction part.
  • a hollow structure 10 of the present embodiment includes a core layer 20 including a plurality of cells S therein, and a skin layer bonded to a first surface (upper surface) 20a of the core layer 20. 30 and a skin layer 40 bonded to the second surface (lower surface) 20 b of the core layer 20.
  • the core layer 20 and the skin layers 30 and 40 are made of a conventionally known thermoplastic resin.
  • the thermoplastic resin constituting the core layer 20 and the skin layers 30 and 40 are, for example, polypropylene resin, polyamide resin, polyethylene resin, acrylonitrile-butadiene-styrene copolymer resin, acrylic resin, polybutylene terephthalate resin, and the like.
  • the core layer 20 and the skin layers 30 and 40 are preferably made of the same material thermoplastic resin, and in this embodiment are made of polypropylene resin.
  • the core layer 20 is formed by folding a single sheet material obtained by molding a polypropylene resin sheet into a predetermined shape.
  • illustration of the skin layers 30 and 40 is abbreviate
  • the core layer 20 includes a first wall (upper wall portion) 21, a second wall (lower wall portion) 22, and a plurality of partition walls (side wall portions) 23.
  • the plurality of partition walls 23 extend between the first wall 21 and the second wall 22 to form a hexagonal cylindrical wall portion.
  • the first wall 21, the second wall 22, and the plurality of partition walls 23 partition the hexagonal columnar cells S inside the core layer 20.
  • the plurality of cells S partitioned inside the core layer 20 includes a first cell S1 and a second cell S2 having different configurations.
  • the first cell S1 opens to the first end (upper end) closed by the first wall 21 and to the lower side without being closed. And a second end (lower end). That is, the first surface 20a of the core layer 20 that defines the first cell S1 is configured by the first wall 21, and the second surface 20b of the core layer 20 that defines the first cell S1 is the second edge of the partition wall 23. It consists of
  • the second cell S2 opens to the second end (lower end) closed by the second wall 22 and without being closed. And a first end (upper end). That is, the second surface 20b of the core layer 20 that partitions the second cell S2 is configured by the second wall 22, and the first surface 20a of the core layer 20 that partitions the second cell S2 is configured by the upper edge of the partition wall 23. Has been.
  • the plurality of first cells S1 are arranged in the X direction to form a column, and the plurality of second cells S2 are arranged in the X direction.
  • the columns of the first cells S1 and the columns of the second cells S2 are alternately arranged in the Y direction orthogonal to the X direction.
  • a space between two first cells S1 arranged in the X direction is partitioned by a partition wall 23 having a two-layer structure, and two second cells S2 aligned in the X direction.
  • the partition wall 23 includes a first layer (first sidewall portion) 23 a and a second layer (second sidewall portion) 23 b, and extends perpendicularly to the first wall 21 and the second wall 22.
  • the adjacent first cell S ⁇ b> 1 and second cell S ⁇ b> 2 are partitioned by a partition wall 23 having a one-layer structure extending perpendicularly to the first wall 21 and the second wall 22.
  • the first edges (upper edge in the figure) and the second edges (lower edge in the figure) of the first layer 23a and the second layer 23b are thermally welded together.
  • the first layer 23a and the second layer 23b are joined to each other via a joining portion 23c at least in an intermediate portion in the extending direction (vertical direction).
  • the joint portion 23c of the present embodiment is an adhesive layer, and the entire surface of the first layer 23a is joined (adhered) to the entire surface of the second layer 23b via the joint portion 23c (adhesive layer). Therefore, the first edges of the first layer 23a and the second layer 23b and the second edges are joined via the joint 23c, and the thermoplastic resin is thermally melted and thermally welded. Including parts.
  • the material of the adhesive constituting the adhesive layer is not particularly limited as long as it is conventionally known.
  • a hot melt adhesive made of a resin compatible with the polypropylene resin is used.
  • other hot melt adhesive materials include ethylene vinyl acetate copolymer (EVA) resin, polyester resin, and polyamide resin.
  • EVA ethylene vinyl acetate copolymer
  • the adhesive is a substance that adheres to two or more adherends in a molten state and then fixes the two or more adherends to each other by being cured by heat, light, chemical reaction, moisture, or the like. .
  • the skin layers 30 and 40 are respectively joined to the outer surface (upper surface) of the first wall 21 and the outer surface (lower surface) of the second wall 22 of the core layer 20.
  • the skin layer 30 is bonded to the first end (upper end) of the first wall 21 of the first cell S1 and the partition wall 23 of the second cell S2 constituting the first surface 20a of the core layer 20.
  • the skin layer 40 is joined to the second end (lower end) of the partition wall 23 of the first cell S1 and the second wall 22 of the second cell S2 that constitute the second surface 20b of the core layer 20.
  • the part which divides 1st cell S1 among the 1st surface (upper surface) of the hollow structure 10 has the 2 layer structure which consists of the 1st wall 21 and the skin layer 30 of the core layer 20, and 2nd The portion that partitions the cell S2 has a single-layer structure including only the skin layer 30.
  • the part which divides 1st cell S1 among the 2nd surface (lower surface) of the hollow structure 10 has 1 layer structure of only the skin layer 40
  • the part which divides 2nd cell S2 is a core layer It has a two-layer structure including twenty second walls 22 and a skin layer 40.
  • the manufacturing method of the hollow structure 10 includes a forming step, a joint forming step, a folding step, a joining step, and a skin layer joining step.
  • the forming step is a step of forming the sheet material 100 from a sheet made of thermoplastic resin.
  • the joining portion forming step is a step of applying an adhesive to the sheet material 100 to form the joining portion 23c (adhesive layer).
  • the folding step is a step of forming the core layer 20 by folding the sheet material 100.
  • the joining step is a step of joining the first layer 23a and the second layer 23b having a two-layer structure through the joint portion 23c.
  • the skin layer joining step is a step of joining the skin layers 30 and 40 to both surfaces of the core layer 20 to form the hollow structure 10.
  • the plurality of steps for manufacturing the hollow structure 10 are continuously performed along the conveyance path formed by the apparatus T shown in FIG.
  • FIG. 3 schematically shows the apparatus T, where the left side is the upstream side of the transport path and the right side is the downstream side of the transport path.
  • the apparatus T includes the following mechanisms arranged in order from the upstream side of the conveying path, that is, a sheet roll 61 around which a thermoplastic resin sheet is wound, a vacuum forming drum 62 for a forming process, and a joining portion forming process.
  • Rolls 66, 67 and two third conveyors 68 for the skin layer joining process Rolls 66, 67 and two third conveyors 68 for the skin layer joining process.
  • the two transport rolls 63 are arranged so as to sandwich the transport path.
  • the two first conveyors 64 are arranged so as to sandwich the conveyance path.
  • the two third conveyors 68 are arranged so as to sandwich the
  • the thermoplastic resin sheet wound around the sheet roll 61 is sent to the vacuum forming drum 62 while being unwound.
  • the vacuum forming drum 62 forms the sheet material 100 by forming a predetermined uneven shape on the sheet.
  • the vacuum forming drum 62 is rotatably supported and can be heated to a predetermined temperature.
  • the rotation speed of the vacuum forming drum 62 is set so that the peripheral speed of the vacuum forming drum 62 is equal to the sheet feeding speed from the sheet roll 61.
  • a cylindrical molding die is attached to the outer peripheral portion of the vacuum forming drum 62.
  • the molding die has one or more through holes (not shown) for evacuation.
  • the vacuum forming drum 62 is configured to perform vacuum forming by adsorbing a sheet through a through hole.
  • the molding die is an uneven shape (first bulging portion 110 and second bulging described below) formed on the sheet material 100 so that the X direction of the sheet material 100 is along the circumferential direction of the outer peripheral surface of the molding die.
  • the outer surface has the same uneven shape as the protruding portion 120).
  • the sheet material 100 formed by a molding die has a plurality of first bulge portions 110 and a plurality of second bulge portions 120.
  • the plurality of first bulges 110 and the plurality of second bulges 120 extend in a strip shape in the X direction.
  • the first bulges 110 and the second bulges 120 are alternately arranged in the width direction (Y direction) and bulge in opposite directions.
  • the first bulging portion 110 protrudes upward
  • the second bulging portion 120 protrudes downward.
  • the first bulging portion 110 when the sheet material 100 is viewed from the top and the second bulging portion 120 when the sheet material 100 is viewed from the bottom have the same shape in the X direction. They are formed at positions shifted from each other by 1 ⁇ 2 pitch.
  • the first bulge portion 110 has a first bulge surface (upper surface) 110a, a pair of connection surfaces (side surfaces) 110b, and a pair of end surfaces 110c.
  • the first bulging portion 110 has a trapezoidal shape obtained by bisecting the regular hexagonal shape with the longest diagonal line in the Y-direction cross section.
  • a pair of end surface 110c exists in the position of the folding line P shown to Fig.2 (a).
  • the angle formed by the end surface 110c and the first bulging surface 110a is about 90 °.
  • the second bulging portion 120 has a second bulging surface (lower surface) 120a, a pair of connection surfaces (side surfaces) 120b, and a pair of end surfaces 120c.
  • the second bulging portion 120 is a trapezoid whose Y-direction cross-sectional shape is obtained by bisecting a regular hexagon with the longest diagonal.
  • the pair of end faces 120c are at the position of the fold line Q shown in FIG.
  • the angle formed by the end surface 120c and the second bulging surface 120a is about 90 °.
  • the length of the second bulge portion 120 in the X direction, that is, the length between the pair of end surfaces 120c is the same as the length of the first bulge portion 110 in the X direction, that is, the length between the pair of end surfaces 110c.
  • connection surface 110b of the 1st bulging part 110 and the connection surface 120b of the 2nd bulging part 120 are divided for convenience of explanation, they have the same configuration.
  • the adjacent portions of the sheet are bulged in different directions by the vacuum forming method using the plasticity of the sheet, and the first bulging portion 110 and the second bulging portion 120 are provided.
  • the sheet material 100 is formed.
  • the sheet material 100 is conveyed between two conveyance rolls 63.
  • the rotational speeds of the two transport rolls 63 are set so that the peripheral speeds of the two transport rolls 63 are equal to the peripheral speed of the vacuum forming drum 62.
  • molten hot-melt adhesives (not shown) are sequentially supplied to the surfaces of the two transport rollers 63.
  • the two conveying rolls 63 apply the melted adhesive to both surfaces of the sheet material 100, respectively.
  • the adhesive applied in the form of a thin film on the first surface (upper surface) of the sheet material 100, that is, the entire first bulging surface 110a of the first bulging portion 110 forms an adhesive layer.
  • the adhesive applied in a thin film shape on the second surface (lower surface) of the sheet material 100, that is, the entire second bulging surface 120a of the second bulging portion 120 forms an adhesive layer.
  • the sheet material 100 with the adhesive layer formed on both surfaces is moved downstream in a state where the vertical movement is restricted by the two first conveyors 64 arranged vertically. Be transported.
  • the conveyance speed by the two first conveyors 64 is based on the peripheral speed of the sheet roll 61, the vacuum forming drum 62, and the conveyance roll 63 arranged on the upstream side of the conveyance path from the two first conveyors 64. Also set to be slower. That is, the conveyance speed by the two first conveyors 64 is set to be slower than the supply speed of the sheet material 100 that has passed between the two conveyance rolls 63.
  • Each first conveyor 64 includes a heating device 64a.
  • the two first conveyors 64 heat the region sandwiched between them to a predetermined temperature. Therefore, when the sheet material 100 is conveyed between the two first conveyors 64, the sheet material 100 is folded while being heated and compressed in the downstream direction. Thereby, the core layer 20 is formed.
  • the sheet material 100 is sequentially folded along the folding lines P and Q. As a result, the core layer 20 shown in FIG. 2C is formed. As shown in FIG. 2B, the sheet material 100 is mountain-folded along the fold line P and valley-folded along the fold line Q. As shown in FIG. 2C, when one first bulging portion 110 is viewed, it is valley-folded by a fold line Q located at the center portion in the X direction, and the first bulging surfaces 110a and X on the right side in the X direction are folded. The first bulging surfaces 110a on the left in the direction are in contact with each other.
  • the folded first bulging portion 110 has a partition wall 23 in which the two first bulging surfaces 110a in contact with each other form a two-layer structure, and a partition wall 23 in which the connection surface 110b forms a one-layer structure. .
  • the two end faces 110 c that have been in contact with each other are aligned to form a first wall 21 that is the first end of the partition wall 23.
  • the second bulging surface 120 a on the right side in the X direction and the X direction are formed by being folded at a folding line P located at the center in the X direction between two adjacent folding lines Q.
  • the second bulging surface 120a on the left side is in contact with each other.
  • the folded second bulging portion 120 includes a partition wall 23 in which two second bulging surfaces 120a in contact with each other form a two-layer structure, and a partition wall 23 in which the connection surface 120b forms a one-layer structure. .
  • the two end surfaces 120 c that are in contact with each other at the lower end of the partition wall 23 are aligned to form a second wall 22 that is the second end of the partition wall 23.
  • the adhesive in which the two transport rolls 63 are melted is applied to both surfaces of the sheet material 100, and in the folding process, the heating devices 64a of the two first conveyors 64 heat the sheet material 100.
  • the adhesive of the adhesive layer is in a molten state. Further, the core layer 20 heated by the two heating devices 64 a is pressed by the two first conveyors 64. Therefore, both end edges of the partition wall 23 having a two-layer structure are thermally welded.
  • the core layer 20 formed in the folding process moves toward the two second conveyors 65.
  • the conveyance speed by the two second conveyors 65 is set to be equal to the conveyance speed by the two first conveyors 64. Therefore, the core layer 20 passes between the two second conveyors 65 while maintaining its shape.
  • the two second conveyors 65 are not provided with a heating device. Therefore, the adhesive applied to the partition wall 23 having the two-layer structure of the core layer 20 is cooled and solidified to form the joint portion 23c. Thereby, the first layer 23a and the second layer 23b constituting the two-layer structure are joined via the joining portion 23c (joining step).
  • the core layer 20 moves toward the two third conveyors 68.
  • the conveyance speed by the two third conveyors 68 is set to be equal to the conveyance speed by the two second conveyors 65.
  • Each third conveyor 68 does not include a heating device.
  • the downstream ends (the left end in FIG. 3) of the two third conveyors 68 arranged in the vertical direction constitute a transport port.
  • sheet rolls 66 and 67 each having a sheet made of a thermoplastic resin as a raw material for the skin layers 30 and 40 are disposed.
  • An adhesive (not shown) is applied to the two sheets wound around the sheet rolls 66 and 67, respectively.
  • This adhesive is also preferably a hot-melt adhesive made of a resin compatible with polypropylene resin, like the adhesive layer constituting the joint 23c.
  • the sheets wound around the sheet rolls 66 and 67 are supplied toward the first surface 20a and the second surface 20b of the core layer 20, respectively.
  • the adhesive applied to the supplied sheet is in a molten state. Since the two third conveyors 68 are not provided with a heating device, the adhesive applied to the two sheets respectively supplied to the first surface 20a and the second surface 20b of the core layer 20 is cooled and solidified. Become an adhesive layer. Thereby, the skin layers 30 and 40 are joined to the first surface 20a and the second surface 20b of the core layer 20 through the adhesive layers, respectively. Thus, the hollow structure 10 having the core layer 20 and the skin layers 30 and 40 is obtained.
  • action of the hollow structure 10 is demonstrated based on FIG.
  • the method for manufacturing the hollow structure 10 according to the present embodiment includes a joining portion forming step of applying an adhesive to the sheet material 100 before the folding step of folding the sheet material 100.
  • the hot melt adhesive is applied to the entire contact portion of the partition wall 23 (the first layer 23a and the second layer 23b) of the two-layer structure in the core layer 20. Therefore, as shown in FIG. 4, the first layer 23a and the second layer 23b constituting the two-layer structure are firmly bonded to each other via the bonding portion 23c.
  • production of the folding of the hollow structure 10 from the partition wall 23 of a two-layer structure is suppressed.
  • the partition wall has a two-layer structure. Folding starting from 23 tends to occur. Moreover, as shown by a dotted line in FIG. 4, for example, when the internal pressure in the cell S increases due to some cause, the space between the first layer 23a and the second layer 23b may be deformed so as to be expanded. is there. In this state, when a force for bending the hollow structure 10 in the thickness direction is applied, the strength against bending is further reduced.
  • the hollow structure 10 is formed by folding a sheet material formed from a single sheet made of synthetic resin, and includes a plurality of cells S therein. Part of the plurality of partition walls 23 that partition the plurality of cells S has a two-layer structure including a first layer 23a and a second layer 23b. The first layer 23a and the second layer 23b are joined at least at an intermediate portion in the thickness direction of the hollow structure 10 by a joining portion 23c in which the adhesive is solidified by cooling.
  • the hollow structure 10 having the two-layered partition wall 23 (the first layer 23a and the second layer 23b) as a starting point. It is hard to break. Therefore, according to the said manufacturing method, the hollow structure 10 excellent in bending strength is obtained.
  • the plurality of cells S of the core layer 20 included in the hollow structure 10 includes first cells S1 and second cells S2 having different configurations.
  • the first cell S ⁇ b> 1 has a first end closed by the first wall 21 and a second end closed by the skin layer 40.
  • the second cell S ⁇ b> 2 has a second end closed by the second wall 22 and a first end closed by the skin layer 30. That is, when the core layer 20 is viewed alone, the second end of the first cell S1 and the second end of the second cell S2 are open ends. Therefore, the core layer 20 of the present embodiment is lighter than the core layer having two wall portions that close both ends of all the cells S. Therefore, the hollow structure 10 is not only excellent in bending strength but also lightweight. In addition, the hollow structure 10 is advantageous in terms of cost because the amount of the thermoplastic resin used as a material is small.
  • the method for manufacturing the hollow structure 10 includes folding the sheet material 100 after the joint forming step.
  • a hot melt adhesive is applied to the bulging surface 120a. Therefore, by folding and cooling the sheet material 100, the first bulging portion 110 and the second bulging portion 120 can be joined at the joining portion 23c.
  • work which joins the 1st bulging part 110 and the 2nd bulging part 120 can be performed easily.
  • a joining portion 23c that joins the first bulging portion 110 and the second bulging portion 120 that is, the first bulging surface 110a of the first bulging portion 110 and the second bulging surface of the second bulging portion 120.
  • the adhesive layer between 120a is formed by applying a hot melt adhesive with the transport roll 63 heated to a predetermined temperature. Therefore, the hot melt adhesive can be easily applied in a thin film shape. According to the manufacturing method of the present embodiment, the joint portion 23c can be easily formed.
  • the manufacturing method of the hollow structure 10 includes a molding process, a joint forming process, a folding process, a joining process, and a skin layer joining process. These processes are continuously performed along the conveyance path formed by the apparatus T. Therefore, the manufacturing method of this embodiment is excellent in productivity and mass productivity, and can manufacture the hollow structure 10 advantageously in terms of cost.
  • the conveying speeds of the two first conveyors 64 used in the folding step are the peripheral speeds of the sheet roll 61, the vacuum forming drum 62, and the conveying rolls 63 arranged on the upstream side of the first conveyor 64. Is set to be slower. That is, the conveyance speed by the two first conveyors 64 is slower than the supply speed of the sheet material 100 that has passed between the two conveyance rolls 63. Therefore, the sheet material 100 is sequentially folded along the fold lines P and Q. The folding process can be easily performed by moving the sheet material 100.
  • Each first conveyor 64 used in the folding step includes a heating device 64a. Therefore, the core layer 20 can be folded while keeping the hot melt adhesive in a molten state.
  • the adhesive layer is solidified by cooling to form the joint portion 23c. That is, the partition wall 23 having a two-layer structure can be bonded via the bonding portion 23c while maintaining the shape of the core layer 20 between the two second conveyors 65. Therefore, the first layer 23a and the second layer 23b constituting the two-layer structure are firmly joined without being displaced.
  • the junction part 23c is comprised by the contact bonding layer, it is not limited to this.
  • a welding layer formed by welding a low melting point film may be used as the bonding portion 23c.
  • a roller for supplying a low melting point film may be disposed in place of the transport roll 63 for applying the adhesive.
  • the low melting point film may have a single layer structure or a multilayer structure, and the material thereof is not particularly limited.
  • a multi-layer structure it may be a multi-layer structure of different material resins made of polypropylene resin and polyethylene resin, or a multi-layer structure of the same material such as homopolymer polypropylene resin or random polymer polypropylene resin.
  • the thermoplastic resins constituting the first layer 23a and the second layer 23b may be joined by heat welding.
  • the two conveying rolls 63 in the apparatus T are heated to a predetermined temperature
  • the first bulging surface 110a and the second bulging surface of the sheet material 100 pass by passing between the two conveying rolls 63. 120a will be in the state which the thermoplastic resin which comprises the same sheet
  • the sheet material 100 passes between the two first conveyors 64, the sheet material 100 is heated by the two heating devices 64 a to be folded in a state in which the thermoplastic resin is thermally melted to become the core layer 20.
  • the hot-melted thermoplastic resin is solidified by cooling to form the joint portion 23c. That is, the joining portion 23c is configured by a portion (thermal welding portion) in which the thermoplastic resin thermally melted on the first bulging surface 110a and the second bulging surface 120a is solidified.
  • the device T does not include the two transport rolls 63, and the heating temperature of the heating device 64a included in each first conveyor 64 may be adjusted.
  • the heating temperature of both the heating devices 64a may be adjusted to a temperature close to the temperature at which the thermoplastic resin constituting the sheet material 100 is thermally melted.
  • seat materials 100 melts.
  • the thermoplastic resin of the first bulging surface 110a and the second bulging surface 120a is solidified by cooling to form the joint portion 23c. .
  • the first layer 23a and the second layer 23b constituting the two-layer structure are joined by the joining portion 23c formed over the entire surface, but the range of the joining portion 23c is not limited to this.
  • the joint portion 23c is lateral to the portion of the partition wall 23 having a two-layer structure excluding the upper edge (first edge) and the lower edge (second edge). It may be provided so as to extend in the direction.
  • the joining portion 23c is arranged at the center in the vertical direction of the first layer 23a and the second layer 23b, and is at least about 1/2 of the vertical length of the first layer 23a and the second layer 23b. Preferably, it has a length, more preferably at least about 2/3.
  • a central region in the vertical direction of the first layer 23a and the second layer 23b is referred to as a central portion.
  • the bending strength of the hollow structure 10 is improved when the joint portion 23c is disposed at the central portion as compared with the case where the joint portion 23c is disposed at other portions except the upper and lower ends. Moreover, sufficient bending strength can be imparted to the hollow structure 10 even when the joint portion 23 c is disposed only in the central portion.
  • 7A to 7F show the two-layered partition wall 23 as viewed from the front. In FIG. 7A to FIG. 7F, the upper end is the first end, the lower end is the second end, and two end edges that extend in a direction intersecting the upper end edge and the lower end edge are referred to as side edges.
  • two joint portions 23c extending in the lateral direction may be arranged along the upper and lower ends of the partition wall 23, respectively.
  • two joint portions 23 c that extend in the vertical direction may be arranged so as to be along the both side ends of the partition wall 23.
  • one joint portion 23c may be arranged so as to extend in the vertical direction at the center in the horizontal direction of the partition wall 23.
  • the joint portion 23 c may be disposed so as to extend along the outer edge of the partition wall 23.
  • a plurality of dot-like joint portions 23 c may be arranged on the partition wall 23.
  • the modified examples shown in FIGS. 7A to 7F can be combined with each other.
  • the modification example shown in FIG. 7 (e) may be combined with the modification example shown in FIG. 7 (f). This increases the area of the joint 23c and improves the joint strength between the first layer 23a and the second layer 23b, so that the bending strength of the hollow structure 10 is improved.
  • the portion to which the adhesive is applied may be appropriately adjusted in the joint portion forming step. For example, if a groove is formed on the transport roll 63 for supplying the hot melt adhesive, a portion where the hot melt adhesive is not applied can be formed on the first bulging surface 110a and the second bulging surface 120a. . Further, instead of supplying the hot melt adhesive from the transport roll 63, for example, the adhesive can be directly applied to or sprayed on the sheet material 100.
  • the joining part 23c may be arrange
  • the upper end edge and the lower end edge of the partition wall 23 having the two-layer structure of the above embodiment are a part joined (adhered) via the joint part 23c and a part thermally welded by the thermal melting of the thermoplastic resin.
  • the present invention is not limited to this, and the upper edge and the lower edge may not be joined (adhered) or thermally welded. That is, the 1st layer 23a and the 2nd layer 23b shall be joined only via the junction part 23c, and upper end edges and lower end edges may not be mutually joined.
  • each 1st conveyor 64 does not need to be provided with the heating apparatus 64a.
  • the upper end edges and the lower end edges of the first layer 23a and the second layer 23b are not thermally welded, and the core in which the joint portion 23c is disposed in the middle portion in the vertical direction of the first layer 23a and the second layer 23b. Layer 20 is obtained.
  • the sheet material 100 before forming the core layer 20 is not limited to the shape shown in FIG.
  • the first bulging surface 110a and the second bulging surface 120a may not be flat surfaces, but may be curved surfaces that protrude in the bulging direction.
  • the first bulging surface 110a is curved so as to protrude upward in FIG. 2A
  • the second bulging surface 120a is curved so as to protrude downward in FIG. 2A.
  • the adhesive is cured thereafter, whereby the first layer 23a and the second layer 23b are firmly bonded all over. Such an effect can be similarly obtained when the second bulging surfaces 120a are joined to each other.
  • the formation method of the junction part 23c is not limited to the aspect of the said embodiment.
  • the joint portion 23c may be formed using the device T1 shown in FIG.
  • the apparatus T1 includes two heating jigs 71 and 72 arranged between the first conveyor 64 and the third conveyor 68 in place of the second conveyor 65 of the apparatus T shown in FIG.
  • the two heating jigs 71 and 72 are respectively arranged above and below the conveyance path.
  • the heating jigs 71 and 72 heat the partition wall 23 having a two-layer structure, the thermoplastic resins constituting the first layer 23a and the second layer 23b are thermally melted.
  • the transport roll 63 of the apparatus T1 is configured to be able to heat the sheet material 100 by being heated to a predetermined temperature, but is not configured to supply a hot-melt adhesive. Therefore, the core layer 20 (the partition wall 23 having a two-layer structure) that has passed through the two first conveyors 64 does not include the joint portion 23c.
  • the manufacturing method of the hollow structure 10 using such an apparatus T1 includes a molding step of molding the sheet material 100 from a single sheet made of synthetic resin, and folding the sheet material 100 to thereby form the first layer 23a and the second layer.
  • the folding step of forming the intermediate body 90 having the partition wall 23 having the two-layer structure by contacting the surface 23b, and the thickness direction of the first layer 23a and the second layer 23b in the partition wall 23 having the two-layer structure of the intermediate body 90 A joining step for joining the intermediate portions of the two.
  • heating is performed in a state where the partition wall 23 having a two-layer structure is sandwiched between the heating jigs 71 and 72, thereby forming the joining portion 23c.
  • the intermediate body 90 mentioned here is different from the core layer 20 of the above embodiment in that an adhesive layer is not interposed between the first layer 23a and the second layer 23b, In other respects, the core layer 20 is similarly configured.
  • the heating jigs 71 and 72 are arranged so as to face the first surface 20a and the second surface 20b, respectively, with respect to the core layer 20 (intermediate body 90) moving on the apparatus T1. Is done.
  • the heating jig 71 has a plurality of small heating portions (heating plates) 71 a extending in parallel with each other toward the conveyance path of the core layer 20.
  • Each heating part 71a has two flat heating plates parallel to each other.
  • the two heating plates are arranged with a gap corresponding to the thickness of the partition wall 23 having a two-layer structure.
  • the plurality of heating units 71a are arranged so as to correspond to portions where the second cells S2 are arranged in the core layer 20 (intermediate body 90) moving along the transport path. As shown in FIG. 5, when the heating jig 71 descends toward the first surface 20a and each heating unit 71a enters the inside of the corresponding second cell S2, the partition walls that partition the second cell S2. 23 is sandwiched between two heating plates of the corresponding heating unit 71a. Thereby, the thermoplastic resin which comprises the partition wall 23 is heat-melted with the heat from the heating part 71a.
  • the heating jig 71 is configured to be movable in accordance with the core layer 20 that moves on the apparatus T1 at a predetermined speed. That is, the moving speed of the heating jig 71 is set to be equal to the transport speed of the two first conveyors 64. The heating jig 71 moves upward after thermally melting the plurality of partition walls 23.
  • the heating jig 72 has a plurality of small heating parts (heating plates) 72 a that protrude in parallel to each other toward the conveyance path of the core layer 20.
  • Each heating unit 72a has two heating plates parallel to each other.
  • the two heating plates are arranged with a gap corresponding to the thickness of the partition wall 23 having a two-layer structure.
  • the plurality of heating units 72a are arranged so as to correspond to portions where the first cells S1 are arranged in the core layer 20 (intermediate body 90) moving along the transport path. As shown in FIG.
  • the heating jig 72 rises toward the second surface 20b and each heating unit 72a enters the inside of the corresponding first cell S1, the partition walls that partition the first cell S1. 23 is sandwiched between the two heating plates of the corresponding heating unit 72a. Thereby, the thermoplastic resin which comprises the partition wall 23 is heat-melted with the heat from the heating part 72a.
  • the heating jig 72 is configured to be movable in the same direction at the same speed as the core layer 20 (intermediate body 90) moving on the apparatus T1 at a predetermined speed. After the heating jig 72 heat-melts the plurality of partition walls 23, the heating jig 72 moves downward.
  • the width dimension (the length in the thickness direction of the hollow structure 10) of the heating plate included in the heating units 71a and 72a is smaller than the length dimension of the partition wall 23 (the length in the thickness direction of the hollow structure 10). Also good.
  • the central portion of the partition wall 23 is sandwiched between two heating plates having a small width, the first layer 23 a and the second layer 23 b are joined at each intermediate portion in the thickness direction of the hollow structure 10. At this time, the portion sandwiched between the two heating plates may be melted by heat to reduce the thickness of the layers 23a and 23b.
  • the resin melted by heat protrudes outside the two heating plates, the area around the joint 23c becomes thick.
  • the partition wall 23 has a joint portion 23c (thin portion) that is thinner than the portion that is not thermally melted in the central portion in the thickness direction of the hollow structure 10, and the outer edge of the joint portion 23c It has a thick part with increased thickness.
  • the apparatus T1 further includes two fourth conveyors 69 disposed between the heating jigs 71 and 72 and the third conveyor 68.
  • the two fourth conveyors 69 are arranged so as to sandwich the conveyance path.
  • the core layer 20 (intermediate body 90) heated by the heating jigs 71 and 72 is conveyed toward the fourth conveyor 69.
  • the two fourth conveyors 69 do not include a heating device. Therefore, the partition wall 23 is cooled and solidified, and a joint portion 23c is formed between the first layer 23a and the second layer 23b.
  • the joining portion 23c can be formed to join the first layer 23a and the second layer 23b.
  • the heating jig 71 is shown larger than the core layer 20 (intermediate body 90) for easy understanding.
  • the joining portion 23c can be formed by performing at least one of ultrasonic treatment, vibration treatment, high frequency treatment, and laser treatment on the partition wall 23 having a two-layer structure.
  • high-frequency induction heat treatment high-frequency welder treatment
  • the molecules of the high frequency exothermic resin contained in the first layer 23a and the second layer 23b are vibrated, and the heat generated by the molecular motion is used to weld the first layer 23a and the second layer 23b together.
  • the intermediate body 90 is formed from a sheet material containing a high-frequency exothermic resin, or the intermediate body 90 is formed by attaching a film containing a high-frequency exothermic resin to the sheet material, and a high-frequency welder treatment is performed. May be.
  • the intermediate body 90 is formed from a sheet material including a metal piece or a high-frequency heating element, or the intermediate body 90 is formed by attaching a film including a metal piece or a high-frequency heating element to the sheet material. Processing can also be performed.
  • the intermediate 90 is formed from a sheet material containing an absorbent (black or the like) having a high laser absorption rate, or a film containing an absorbent having a high laser absorption rate is used as a sheet material.
  • the intermediate body 90 can be formed by being attached to the substrate, and laser treatment can be performed.
  • the core layer 20 may not be formed through a folding process for folding the sheet material 100.
  • the core layer 80 may be formed from a sheet material 200 as shown in FIG.
  • the planar regions 210 and the bulging regions 220 are alternately arranged in the longitudinal direction (X direction) of the sheet material 200. Both the planar region 210 and the bulging region 220 extend along the Y direction.
  • the bulging area 220 bulges with respect to the reference plane (a plane portion located between the second bulging portions 222 in the bulging area 220) and the flat area 210, and bulges in the Y direction.
  • a first bulging portion 221 extending over the entire region 220.
  • the first bulging portion 221 includes a first bulging surface (upper surface) that bulges from the reference surface, and a connection surface (side surface) that is located on both sides of the bulging surface and extends from the reference surface toward the first bulging surface. Have.
  • the angle formed by the first bulging surface of the first bulging portion 221 and the connection surface is preferably 90 °.
  • the width of the first bulging portion 221 (the length of the first bulging surface in the short direction) is equal to the width of the planar region 210, and the bulging height of the first bulging portion 221 (the short side of the connecting surface). (Length in the direction) is twice as long.
  • the bulging region 220 includes a plurality of second bulging portions 222 formed integrally with the first bulging portion 221.
  • the second bulges 222 extend in opposite directions on both sides of the first bulge 221 and are aligned in the Y direction.
  • Each of the second bulges 222 includes a second bulge surface (upper surface) that bulges from the reference surface, two inclined surfaces (side surfaces) that extend obliquely from the reference surface to the second bulge surface, a second bulge surface, and 2 And an end surface intersecting with the two inclined surfaces.
  • the second bulge surface is flush with the first bulge surface.
  • Each second bulge surface extends in the X direction so as to be orthogonal to the first bulge surface extending in the Y direction.
  • a cross section obtained by cutting each second bulge portion 222 by a plane orthogonal to the X direction is a trapezoid obtained by dividing a regular hexagon into two parts by the longest diagonal line.
  • the bulging height of the second bulging portion 222 is equal to the bulging height of the first bulging portion 221.
  • the interval between the two second bulging portions 222 arranged in the Y direction is equal to the width of the second bulging surface.
  • the core layer 80 is formed by folding the sheet material 200 configured as described above along the fold lines P and Q. Specifically, the sheet material 200 is valley-folded at the fold line P between the flat area 210 and the bulge area 220, and the fold line Q between the first bulge surface and the connection surface of the first bulge portion 221. Fold up and shrink in the X direction. 6B and 6C, the first bulge surface of the first bulge portion 221 and the connection surface are folded, and the end surface of the second bulge portion 222 and the planar region 210 are overlapped. As a result of folding, a prismatic partition 230 extending in the Y direction with respect to one bulging region 220 is formed. By forming such partition bodies 230 continuously in the X direction, a hollow plate-like core layer 80 is formed.
  • the first wall 81 of the core layer 80 is formed by the first bulge surface and the connection surface of the first bulge portion 221, and the second bulge portion 222
  • a second wall 82 of the core layer 80 is formed by the end face and the planar region 210.
  • the hexagonal column-shaped region that is partitioned and formed by folding the second bulging portion 222 becomes the second cell S2 ′ in the core layer 80, and the hexagon that is partitioned and formed between two adjacent partition bodies 230.
  • the columnar region becomes the first cell S1 ′ in the core layer 80.
  • the second bulging surface and the inclined surface of the second bulging portion 222 constitute the partition wall 83 of the second cell S2 ′, and the inclined surface of the second bulging portion 222 and the bulging region 220
  • the reference plane constitutes the partition wall 83 of the first cell S1 ′.
  • a contact portion between the second bulge surfaces of the second bulge portion 222 and a contact portion between the reference surfaces of the bulge region 220 form a partition wall 83 having a two-layer structure.
  • the second bulging surface of the second bulging portion 222 (the upper surface in FIGS. 6A to 6C) and the reference of the bulging region 220 are used.
  • An adhesive may be applied to the surface (the lower surfaces of FIGS. 6A to 6C).
  • the manufacturing method of the hollow structure 10 is not limited to a configuration in which all steps are performed by one apparatus T, and may be performed by using a plurality of apparatuses.
  • another apparatus may implement the molding process and the folding process for molding the sheet material 100, or another apparatus may implement the folding process and the skin layer joining process.
  • Adhesive applied in the joint formation process is not limited to hot melt adhesives. Further, the adhesive may be applied using an apparatus that is not the transport roll 63. For example, an adhesive that is not a hot melt system may be applied to the sheet material 100 with a brush or the like, or may be sprayed onto the sheet material 100 with a spray device or the like.
  • the skin layers 30 and 40 may be thermally welded to the core layer 20 without using an adhesive.
  • -Cell S with which the hollow structure 10 is provided does not need to be hexagonal column shape, for example, polygonal column shapes, such as quadrangular column shape and octagonal column shape, and column shape may be sufficient as it.
  • -At least one of the skin layers 30 and 40 joined to the hollow structure 10 may have a multilayer structure. -At least one of the skin layers 30 and 40 may be omitted.
  • thermoplastic resin constituting the core layer 20 and the skin layers 30 and 40 those added with various functional resins may be used. For example, it is possible to increase flame retardancy by adding a flame retardant resin to a thermoplastic resin. It is also possible to use the core layer 20 and the skin layers 30 and 40 added with various functional resins, and the core layer 20 and the skin layers 30 and 40 have a function. It is also possible to add a functional resin.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
PCT/JP2019/016186 2018-04-16 2019-04-15 中空構造体及びその製造方法 Ceased WO2019203194A1 (ja)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008520456A (ja) * 2004-11-19 2008-06-19 カー・イュー・ルーベン・リサーチ・アンド・ディベロップメント 半閉型の熱可塑性ハニカム体、その製造工程および製造装置
JP2013237242A (ja) * 2012-05-17 2013-11-28 Toray Ind Inc ハニカム構造体およびサンドイッチ構造体
WO2016031479A1 (ja) * 2014-08-29 2016-03-03 三菱瓦斯化学株式会社 ハニカム用基材、ハニカム構造体及びサンドイッチ構造体

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* Cited by examiner, † Cited by third party
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JP4862975B2 (ja) * 2000-02-03 2012-01-25 司 野澤 ハニカム構造体、ハニカムセルおよびハニカム構造体の製造方法
JP5505699B2 (ja) * 2010-02-03 2014-05-28 トヨタ紡織株式会社 車両用内装材及びその製造方法
WO2012118030A1 (ja) * 2011-02-28 2012-09-07 住江織物株式会社 樹脂構造体

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008520456A (ja) * 2004-11-19 2008-06-19 カー・イュー・ルーベン・リサーチ・アンド・ディベロップメント 半閉型の熱可塑性ハニカム体、その製造工程および製造装置
JP2013237242A (ja) * 2012-05-17 2013-11-28 Toray Ind Inc ハニカム構造体およびサンドイッチ構造体
WO2016031479A1 (ja) * 2014-08-29 2016-03-03 三菱瓦斯化学株式会社 ハニカム用基材、ハニカム構造体及びサンドイッチ構造体

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