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JP6696789B2 - Tank manufacturing method - Google Patents
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JP6696789B2 - Tank manufacturing method - Google Patents

Tank manufacturing method Download PDF

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JP6696789B2
JP6696789B2 JP2016025278A JP2016025278A JP6696789B2 JP 6696789 B2 JP6696789 B2 JP 6696789B2 JP 2016025278 A JP2016025278 A JP 2016025278A JP 2016025278 A JP2016025278 A JP 2016025278A JP 6696789 B2 JP6696789 B2 JP 6696789B2
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fiber
reinforced resin
resin sheet
body portion
liner
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JP2017140809A (en
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稲生 隆嗣
隆嗣 稲生
龍仁 神藤
龍仁 神藤
吉宏 岩野
吉宏 岩野
石橋 一伸
一伸 石橋
潔 鵜澤
潔 鵜澤
影山 裕史
裕史 影山
真実 坂口
真実 坂口
真人 金崎
真人 金崎
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Kanazawa Institute of Technology (KIT)
Toyota Motor Corp
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Kanazawa Institute of Technology (KIT)
Toyota Motor Corp
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30Hydrogen technology
    • Y02E60/32Hydrogen storage

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  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Pressure Vessels And Lids Thereof (AREA)
  • Moulding By Coating Moulds (AREA)

Description

本発明は、ガス等を貯蔵するに好適なタンクの製造方法に関する。   The present invention relates to a method for manufacturing a tank suitable for storing gas and the like.

たとえば、天然ガス自動車または燃料電池自動車などには、燃料ガスを貯蔵するタンクが利用されている。この種のタンクは、軽量化および高強度化を図るべく、タンクの形状に応じたライナーに、繊維強化樹脂が被覆されている。   For example, a tank for storing fuel gas is used in a natural gas vehicle or a fuel cell vehicle. In this type of tank, a fiber reinforced resin is coated on a liner corresponding to the shape of the tank in order to reduce weight and increase strength.

このようなタンクの製造方法として、たとえば、特許文献1には、以下に示すタンクの製造方法が提案されている。この製造方法では、まず、筒状の胴体部と、前記胴体部の両側に形成されたドーム状の側端部と、を有したライナーを準備する。次に、ライナーに、樹脂が含浸された連続繊維をヘリカル巻きした第1ヘリカル層を成形する。次に、ヘリカル層の表面に、シート状の繊維強化樹脂を巻回してフープ層(筒状部)を成形する。さらに、第1ヘリカル層が筒状部から露出した部分と、筒状部とに、樹脂が含浸された連続繊維をヘリカル巻きした第2ヘリカル層(補強層)を成形する。   As a method of manufacturing such a tank, for example, Patent Document 1 proposes the following method of manufacturing a tank. In this manufacturing method, first, a liner having a tubular body portion and dome-shaped side end portions formed on both sides of the body portion is prepared. Next, the first helical layer in which the continuous fiber impregnated with the resin is helically wound on the liner is formed. Next, a sheet-shaped fiber reinforced resin is wound around the surface of the helical layer to form a hoop layer (cylindrical portion). Further, a second helical layer (reinforcing layer) formed by helically winding continuous fibers impregnated with resin is formed on the tubular portion and the portion where the first helical layer is exposed from the tubular portion.

特開2010−265931号公報JP, 2010-265931, A

しかしながら、特許文献1に示す製造方法では、筒状部を成形した際に、筒状部の肉厚により、筒状部の表面と、筒状部から露出した第1ヘリカル層の表面との間に段差が形成されてしまう。このような段差が形成された部分に補強層を成形した場合、補強層と段差が形成された部分に空洞が形成されてしまい、この空洞によりタンクの強度が低下することが想定される。またこのような段差を無くすため、筒状部の両周縁を削り取ると、筒状部内の強化繊維が切断され、この部分のタンク強度が低下してしまう。   However, in the manufacturing method shown in Patent Document 1, when the tubular portion is molded, the thickness of the tubular portion causes a gap between the surface of the tubular portion and the surface of the first helical layer exposed from the tubular portion. A step is formed on the surface. When the reinforcing layer is formed in the portion where the step is formed, a cavity is formed in the portion where the reinforcing layer and the step are formed, and it is assumed that the cavity reduces the strength of the tank. Further, if both edges of the tubular portion are shaved off in order to eliminate such a step, the reinforcing fibers in the tubular portion are cut, and the tank strength of this portion is reduced.

本発明は、このような点を鑑みてなされたものであり、ライナーに繊維強化樹脂からなる筒状部を成形しても、筒状部の肉厚による段差に起因した、タンク強度の低下を抑えることができるタンクの製造方法を提供することにある。   The present invention has been made in view of such a point, and even if a tubular portion made of a fiber-reinforced resin is molded on a liner, a decrease in tank strength due to a step due to the thickness of the tubular portion is reduced. It is to provide a manufacturing method of a tank that can be suppressed.

前記課題を鑑みて、本発明に係るタンクの製造方法は、筒状の胴体部と、前記胴体部の両側に形成されたドーム状の側端部と、を有するライナーを少なくとも備えたタンクの製造方法であって、前記胴体部に、1枚の繊維強化樹脂シートを前記ライナーの前記胴体部の軸心に対して直交する方向から複数回巻き付けることにより、筒状部を成形する工程と、前記筒状部が成形されたライナーの両側の側端部に亘って、樹脂が含浸された連続繊維でヘリカル巻きすることにより、補強層を成形する工程と、を含み、前記筒状部を成形する工程において、前記強化繊維樹脂シートとして、前記繊維強化樹脂シートを巻きける際の前記胴体部の軸心方向に亘る前記繊維強化樹脂シートの幅が、前記繊維強化樹脂シートを巻き付けるに従って狭くなるシートを用いることを特徴とする。   In view of the above problems, the method for manufacturing a tank according to the present invention is a method for manufacturing a tank including at least a liner having a tubular body portion and dome-shaped side end portions formed on both sides of the body portion. A method of forming a tubular portion by winding a single fiber-reinforced resin sheet around the body portion a plurality of times in a direction orthogonal to the axis of the body portion of the liner, Forming a reinforcing layer by helically winding a continuous fiber impregnated with a resin over the side ends on both sides of a liner having a formed tubular section, and forming the tubular section. In the step, as the reinforced fiber resin sheet, a width of the fiber reinforced resin sheet across the axial direction of the body portion when winding the fiber reinforced resin sheet is a sheet that becomes narrower as the fiber reinforced resin sheet is wound. It is characterized by using.

本発明によれば、筒状部を成形する工程において、強化繊維樹脂シートとして、繊維強化樹脂シートを巻きける際の胴体部の軸心方向に亘る繊維強化樹脂シートの幅が、繊維強化樹脂シートを巻き付けるに従って狭くなる強化繊維樹脂シートを巻き付ける。これにより、筒状部の周縁部の肉厚を端部に進むに従って薄くすることができ、筒状部とライナーとの間に段差が形成されることを抑えることができる。   According to the present invention, in the step of molding the tubular portion, the width of the fiber reinforced resin sheet extending in the axial direction of the body portion when the fiber reinforced resin sheet is wound is the fiber reinforced resin sheet as the reinforced fiber resin sheet. Wrap the reinforced fiber resin sheet that becomes narrower as you wind. With this, the wall thickness of the peripheral portion of the tubular portion can be made thinner toward the end portion, and it is possible to suppress the formation of a step between the tubular portion and the liner.

これにより、筒状部が成形されたライナーの両側の側端部に亘って、樹脂が含浸された連続繊維でヘリカル巻きした補強層を成形したとしても、ライナーと補強層との間に空洞が形成され難いため、これが起因となるタンクの強度低下を抑えることができる。   Thereby, even if the reinforcing layer helically wound with the continuous fiber impregnated with the resin is formed over the side end portions on both sides of the liner having the tubular portion formed, a cavity is formed between the liner and the reinforcing layer. Since it is difficult to be formed, it is possible to suppress the decrease in the strength of the tank that is caused by this.

(a)〜(d)は、本発明の実施形態に係るタンクの製造方法を説明するための図である。(A)-(d) is a figure for demonstrating the manufacturing method of the tank which concerns on embodiment of this invention. 図1(c)に示す工程を説明するための図である。It is a figure for demonstrating the process shown in FIG.1 (c). (a)は、図1で示された製造方法により製造されたタンクの模式的斜視図であり、(b)は、(a)のA−A線矢視断面図である。(A) is a schematic perspective view of the tank manufactured by the manufacturing method shown in FIG. 1, and (b) is a sectional view taken along the line AA of (a).

以下に、本発明の実施形態に係るタンクの製造方法を、図面を参照しながら説明する。
図1(a)〜図1(d)は、本発明の実施形態に係るタンク1の製造方法を説明するための図である。図2は、図1(c)に示す工程を説明するための図である。図3(a)は、図1で示された製造方法により製造されたタンク1の模式的斜視図であり、図3(b)は、図3(a)のA−A線矢視断面図である。なお、図3(b)は、タンク1の胴体部2の軸心と直交する断面である。
Hereinafter, a method for manufacturing a tank according to an embodiment of the present invention will be described with reference to the drawings.
1A to 1D are views for explaining a method for manufacturing the tank 1 according to the embodiment of the present invention. FIG. 2 is a diagram for explaining the process shown in FIG. 3A is a schematic perspective view of the tank 1 manufactured by the manufacturing method shown in FIG. 1, and FIG. 3B is a cross-sectional view taken along the line AA of FIG. 3A. Is. Note that FIG. 3B is a cross section orthogonal to the axis of the body 2 of the tank 1.

1.ライナー10を成形する工程
本実施形態に係るタンク1は、例えば70MPa程度の高圧水素ガスを収容(充填)するタンクである。まず、本実施形態では、図1(a)に示すように、タンク1を構成するライナー10を準備する。
1. Step of Forming Liner 10 The tank 1 according to the present embodiment is a tank that stores (fills) high-pressure hydrogen gas of, for example, about 70 MPa. First, in this embodiment, as shown in FIG. 1A, a liner 10 that constitutes the tank 1 is prepared.

図1(a)に示すよう、ライナー10は、円筒状の胴体部2と、胴体部2の両側に形成されたドーム状の一対の側端部3と、を有している。ライナー10の胴体部2の外径(外周面23の直径)は、幅aに亘って略同じであり、胴体部2の両端から側端部3に進むに従って、その外径が小さくなっている。胴体部2の内部には、上述した高圧水素ガスを収容する収容空間Sの一部が形成されている。   As shown in FIG. 1A, the liner 10 has a cylindrical body portion 2 and a pair of dome-shaped side end portions 3 formed on both sides of the body portion 2. The outer diameter of the body portion 2 of the liner 10 (diameter of the outer peripheral surface 23) is substantially the same over the width a, and the outer diameter becomes smaller as it goes from both ends of the body portion 2 to the side end portion 3. .. A part of the accommodation space S for accommodating the above-mentioned high-pressure hydrogen gas is formed inside the body portion 2.

側端部3は、ドーム状本体31と、ドーム状本体31の頂部に形成された管状部32とを備えている。管状部32には、外部と収容空間Sとを連通するように、空間貫通孔33が形成されている。ドーム状本体31と管状部32とは、後述する樹脂により一体的に成形されていてもよいが、例えば、管状部32に相当する部分を口金とし、ドーム状本体31を樹脂で成形してもよい。   The side end portion 3 includes a dome-shaped main body 31 and a tubular portion 32 formed on the top of the dome-shaped main body 31. A space through hole 33 is formed in the tubular portion 32 so that the outside and the accommodation space S communicate with each other. The dome-shaped main body 31 and the tubular portion 32 may be integrally molded with a resin described later, but, for example, a portion corresponding to the tubular portion 32 may be used as a mouthpiece and the dome-shaped main body 31 may be molded with resin. Good.

ライナー10の材料には、例えば、熱可塑性樹脂を挙げることができる。たとえば、熱可塑性樹脂として、ポリエステル系樹脂、ポリプロピレン系樹脂、ナイロン系樹脂(例えば6−ナイロン樹脂または6,6−ナイロン樹脂)、ポリアミド系樹脂、ポリカーボネート系樹脂、アクリル系樹脂、またはABS系樹脂などを挙げることができる。またこの他のも、アルミニウム合金、ステンレス鋼などの金属であってもよい。このような材料を用いることにより、収容空間Sに収容された水素ガスが透過することを防止することができる。   The material of the liner 10 may be, for example, a thermoplastic resin. For example, as the thermoplastic resin, polyester resin, polypropylene resin, nylon resin (for example, 6-nylon resin or 6,6-nylon resin), polyamide resin, polycarbonate resin, acrylic resin, ABS resin, or the like. Can be mentioned. Other materials such as aluminum alloy and stainless steel may also be used. By using such a material, the hydrogen gas stored in the storage space S can be prevented from permeating.

2.繊維強化樹脂シート4Aを準備する工程
次に、図1(b)に示す、繊維強化樹脂シート4Aを準備する。繊維強化樹脂シート4Aは、後述するように、筒状部4を成形するためのシート材である。繊維強化樹脂シート4Aは、強化繊維に熱可塑性樹脂または熱硬化性樹脂が含浸されたシートであり、繊維強化樹脂シート4Aの巻き始めの部分4aの幅Aは、ライナー10の胴体部2の外周面23の幅aと略同じである(図1(a),(b)参照)。
2. Step of Preparing Fiber Reinforced Resin Sheet 4A Next, the fiber reinforced resin sheet 4A shown in FIG. 1B is prepared. The fiber-reinforced resin sheet 4A is a sheet material for forming the tubular portion 4, as described later. The fiber reinforced resin sheet 4A is a sheet in which reinforced fibers are impregnated with a thermoplastic resin or a thermosetting resin, and the width A of the winding start portion 4a of the fiber reinforced resin sheet 4A is the outer circumference of the body portion 2 of the liner 10. It is almost the same as the width a of the surface 23 (see FIGS. 1A and 1B).

繊維強化樹脂シート4Aは、強化繊維に熱可塑性樹脂または熱硬化性樹脂が含浸されたシートであり、繊維強化樹脂シート4Aは、後述するように、ライナー10の胴体部2に巻き付けられる。繊維強化樹脂シート4Aは、その巻き始めの部分4aから巻き終わりの部分4bに進むに従って、その幅が狭くなっている。したがって、繊維強化樹脂シート4Aの巻き始めの部分4aの幅Aは、巻き終わりの部分4bの幅Bよりも狭い。   The fiber reinforced resin sheet 4A is a sheet in which reinforced fibers are impregnated with a thermoplastic resin or a thermosetting resin, and the fiber reinforced resin sheet 4A is wound around the body portion 2 of the liner 10 as described later. The width of the fiber-reinforced resin sheet 4A becomes narrower as it goes from the winding start portion 4a to the winding end portion 4b. Therefore, the width A of the winding start portion 4a of the fiber reinforced resin sheet 4A is narrower than the width B of the winding end portion 4b.

繊維強化樹脂シート4Aの強化繊維42は、連続強化繊維であり、一方向に引き揃えられた開繊繊維であり、各強化繊維42には、繊維強化樹脂シート4Aの幅方向と直交する方向に沿って延在している。これにより、後述するように繊維強化樹脂シート4Aを胴体部2に巻き付けたときに、胴体部2の軸心CLと直交する方向に、連続して強化繊維42を配向させることができる。   The reinforcing fiber 42 of the fiber-reinforced resin sheet 4A is a continuous reinforcing fiber and is an open fiber aligned in one direction, and each reinforcing fiber 42 has a direction perpendicular to the width direction of the fiber-reinforced resin sheet 4A. Extends along. Thereby, when the fiber-reinforced resin sheet 4A is wound around the body portion 2 as described later, the reinforcing fibers 42 can be continuously oriented in the direction orthogonal to the axis CL of the body portion 2.

強化繊維42として、ガラス繊維、炭素繊維、アラミド繊維、アルミナ繊維、ボロン繊維、スチール繊維、PBO繊維、天然繊維、又は高強度ポリエチレン繊維などの繊維を挙げることができる。   Examples of the reinforcing fiber 42 include glass fiber, carbon fiber, aramid fiber, alumina fiber, boron fiber, steel fiber, PBO fiber, natural fiber, and high-strength polyethylene fiber.

繊維強化樹脂シート4Aに含まれる樹脂が、熱可塑性樹脂である場合には、上述したライナー10の材料で例示した熱可塑性樹脂を挙げることができる。繊維強化樹脂シート4Aに含まれる樹脂が、熱硬化性樹脂である場合には、例えば、エポキシ系樹脂、ビニルエステル樹脂に代表される変性エポキシ樹脂、フェノール樹脂、メラミン樹脂、ユリア樹脂、不飽和ポリエステル樹脂、アルキド樹脂、ポリウレタン樹脂、熱硬化性ポリイミド樹脂を挙げることができる。   When the resin contained in the fiber-reinforced resin sheet 4A is a thermoplastic resin, the thermoplastic resins exemplified as the material of the liner 10 described above can be mentioned. When the resin contained in the fiber-reinforced resin sheet 4A is a thermosetting resin, for example, epoxy resin, modified epoxy resin represented by vinyl ester resin, phenol resin, melamine resin, urea resin, unsaturated polyester Resin, alkyd resin, polyurethane resin, and thermosetting polyimide resin can be mentioned.

3.筒状部4を成形する工程
次に、図1(a),(c)に示すように、胴体部2の外周面23にシートワインディング法により筒状部4を成形する。具体的には、図2に示すように、ライナー10を回転させながら、1枚の繊維強化樹脂シート4Aを、胴体部2の軸心CLに対して直交する方向から、胴体部2の外周面23に複数回巻き付ける。
3. Step of Forming Cylindrical Portion 4 Next, as shown in FIGS. 1A and 1C, the cylindrical portion 4 is formed on the outer peripheral surface 23 of the body portion 2 by the sheet winding method. Specifically, as shown in FIG. 2, while rotating the liner 10, one fiber-reinforced resin sheet 4A is attached to the outer peripheral surface of the body portion 2 from a direction orthogonal to the axis CL of the body portion 2. Wrap it around 23 multiple times.

より具体的には、繊維強化樹脂シート4Aの巻き始めの部分4aを胴体部2の外周面23に合わせて、繊維強化樹脂シート4Aを胴体部2の外周面23に複数回巻き付ける。本実施形態では、図1(c)および図2に示すように、繊維強化樹脂シート4Aを巻きける際の胴体部2の軸心方向に亘る繊維強化樹脂シート4Aの幅が、繊維強化樹脂シート4Aを巻き付けるに従って狭くなる。   More specifically, the fiber-reinforced resin sheet 4A is wound around the outer peripheral surface 23 of the body portion 2 a plurality of times with the winding start portion 4a of the fiber-reinforced resin sheet 4A aligned with the outer peripheral surface 23 of the body portion 2. In the present embodiment, as shown in FIGS. 1C and 2, the width of the fiber reinforced resin sheet 4A extending in the axial direction of the body portion 2 when the fiber reinforced resin sheet 4A is wound is such that the fiber reinforced resin sheet It becomes narrower as 4A is wound.

これにより、図1(b),(c)に示すように、成形された筒状部4の本体43の外径は、繊維強化樹脂シート4Aの巻き終わりの部分4bの幅Bと同じ幅bの範囲で軸心方向に沿って同じ外径となる。   Thereby, as shown in FIGS. 1B and 1C, the outer diameter of the main body 43 of the molded tubular portion 4 is the same width b as the width B of the winding end portion 4b of the fiber reinforced resin sheet 4A. In the range of, the outer diameter is the same along the axial direction.

一方、筒状部4の両側の周縁部44では、その端部46に進むに従ってその肉厚を薄くすることができ、周縁部44の外径をその端部46に進むに従って小さくすることができる。筒状部4の端部46では、筒状部4の端部46の外径をライナー10(具体的には隣接する側端部3の部分)の外径と略等しくすることができるため、筒状部4とライナー10との間に段差が形成されることを抑えることができる。   On the other hand, in the peripheral edge portions 44 on both sides of the tubular portion 4, the wall thickness can be reduced as it goes to the end portion 46, and the outer diameter of the peripheral edge portion 44 can be made smaller as it goes to the end portion 46. .. At the end portion 46 of the tubular portion 4, the outer diameter of the end portion 46 of the tubular portion 4 can be made substantially equal to the outer diameter of the liner 10 (specifically, the portion of the adjacent side end portion 3). It is possible to prevent a step from being formed between the tubular portion 4 and the liner 10.

繊維強化樹脂シート4Aの樹脂が熱可塑性樹脂である場合には、図2に示すヒータ7,7で繊維強化樹脂シート4Aを熱可塑性樹脂の軟化点以上に加熱し、熱可塑性樹脂を溶融する。繊維強化樹脂シート4Aの熱可塑性樹脂が溶融した状態で、繊維強化樹脂シート4Aをライナー10の円筒状の胴体部2に複数回巻き付ける。巻き付いた状態の繊維強化樹脂シート4Aは、放冷または強制冷却により冷却され、熱可塑性樹脂は、軟化点未満となって固まる。   When the resin of the fiber reinforced resin sheet 4A is a thermoplastic resin, the heaters 7 and 7 shown in FIG. 2 heat the fiber reinforced resin sheet 4A above the softening point of the thermoplastic resin to melt the thermoplastic resin. With the thermoplastic resin of the fiber reinforced resin sheet 4A melted, the fiber reinforced resin sheet 4A is wound around the cylindrical body portion 2 of the liner 10 multiple times. The fiber reinforced resin sheet 4A in the wound state is cooled by cooling or forced cooling, and the thermoplastic resin is hardened at a temperature below the softening point.

繊維強化樹脂シート4Aの樹脂が、熱硬化性樹脂である場合には、繊維強化樹脂シート4Aをライナー10に巻き付けた後、これを加熱することにより、熱硬化性樹脂を硬化させる。   When the resin of the fiber reinforced resin sheet 4A is a thermosetting resin, the fiber reinforced resin sheet 4A is wound around the liner 10 and then heated to cure the thermosetting resin.

成形された筒状部4は、図3(b)に示すように、胴体部2の外周面23の両側に亘って、胴体部2の軸心CLに直交する方向から1つのシート状の繊維強化樹脂層4cが、複数回周回した部分となる。このように、シート状の繊維強化樹脂層4cを複数回周回させた筒状部4を設けることにより、タンク1の胴体部11は、その軸心CLに直交する断面において、より均一な耐圧性を有することができる。   As shown in FIG. 3 (b), the formed tubular portion 4 extends over both sides of the outer peripheral surface 23 of the body portion 2 and forms one sheet-shaped fiber from a direction orthogonal to the axis CL of the body portion 2. The reinforced resin layer 4c becomes a portion which is orbited a plurality of times. In this way, by providing the tubular portion 4 in which the sheet-shaped fiber-reinforced resin layer 4c is wound a plurality of times, the body portion 11 of the tank 1 has a more uniform pressure resistance in the cross section orthogonal to the axis CL thereof. Can have.

4.補強層6を成形する工程
次に、図1(d)に示すように、筒状部4が成形されたライナー10の両側の側端部3,3に亘って、樹脂が含浸された連続繊維61のフィラメントで、フィラメントワインディング法によりヘリカル巻きする。これにより、筒状部4が成形されたライナー10に、図3(a),(b)に示す如き補強層6を成形する。
4. Step of Forming Reinforcing Layer 6 Next, as shown in FIG. 1 (d), resin-impregnated continuous fiber is spread over the side end portions 3 on both sides of the liner 10 on which the tubular portion 4 is formed. The filament of 61 is helically wound by the filament winding method. As a result, the reinforcing layer 6 as shown in FIGS. 3A and 3B is formed on the liner 10 on which the tubular portion 4 is formed.

具体的には、本実施形態では、ライナー10の両側の側端部3,3間において、連続繊維61が、胴体部2の軸心CLの周りを一周する前に、各側端部3において、連続繊維61の巻き付け方向が折り返されるように巻き付ける。   Specifically, in the present embodiment, between the side end portions 3 and 3 on both sides of the liner 10, before the continuous fiber 61 makes one round around the axis CL of the body portion 2, at each side end portion 3. , So that the winding direction of the continuous fiber 61 is folded back.

また、この他の巻き付け方法として、ライナー10の両側の側端部3,3間において、連続繊維61が、胴体部2の軸心CLの周りを少なくとも複数回した後に、各側端部3において、連続繊維61の巻き付け方向が折り返されるように巻き付けてもよい。   In addition, as another winding method, between the side end portions 3 and 3 on both sides of the liner 10, the continuous fiber 61 is wound around the axial center CL of the body portion 2 at least a plurality of times and then at each side end portion 3. The continuous fiber 61 may be wound so that the winding direction of the continuous fiber 61 is folded back.

連続繊維61に含浸された樹脂が熱可塑性樹脂である場合には、加熱しながら、熱可塑性樹脂を軟化させた状態で、連続繊維61を巻き付ける。一方、連続繊維61に含浸された樹脂が熱硬化性樹脂である場合には、連続繊維61を巻き付けた後、(未硬化の)熱硬化性樹脂を加熱して、これを硬化させる。   When the resin impregnated in the continuous fiber 61 is a thermoplastic resin, the continuous fiber 61 is wound while the thermoplastic resin is softened while being heated. On the other hand, when the resin impregnated in the continuous fiber 61 is a thermosetting resin, after winding the continuous fiber 61, the (uncured) thermosetting resin is heated to cure it.

このようにして、図3(a),(b)に示すタンク1を製造することができる。本実施形態では、上述したように筒状部4を成形しても、ライナー10の表面に筒状部4の肉厚に応じた段差の形成を抑えることができるので、樹脂が含浸された連続繊維61でヘリカル巻きした補強層6を成形したとしても、ライナー10と補強層6との間に空洞が形成され難い。このような結果、このような空洞が起因となるタンク1の強度低下を抑えることができる。   In this way, the tank 1 shown in FIGS. 3A and 3B can be manufactured. In the present embodiment, even if the tubular portion 4 is molded as described above, it is possible to suppress the formation of a step on the surface of the liner 10 according to the wall thickness of the tubular portion 4, so that the resin-impregnated continuous Even if the reinforcing layer 6 helically wound with the fiber 61 is formed, it is difficult to form a cavity between the liner 10 and the reinforcing layer 6. As a result, it is possible to prevent the strength of the tank 1 from being lowered due to such a cavity.

以上、本発明の実施の形態を詳述してきたが、具体的な構成はこの実施形態に限定されるものではなく、本発明の要旨を逸脱しない範囲における設計変更があっても、それらは本発明に含まれるものである。   Although the embodiment of the present invention has been described in detail above, the specific configuration is not limited to this embodiment, and even if there are design changes within the scope not departing from the gist of the present invention, they are It is included in the invention.

1:タンク、10:ライナー、2:胴体部、22:端縁、3:側端部、4:筒状部、4A:繊維強化樹脂シート、6:補強層、61:連続繊維、7:ヒータ、CL:軸心、S:収容空間。   1: Tank, 10: Liner, 2: Body part, 22: Edge, 3: Side end part, 4: Cylindrical part, 4A: Fiber reinforced resin sheet, 6: Reinforcing layer, 61: Continuous fiber, 7: Heater , CL: axial center, S: accommodation space.

Claims (1)

筒状の胴体部と、前記胴体部の両側に形成されたドーム状の側端部と、を有するライナーを少なくとも備えたタンクの製造方法であって、
前記胴体部に、1枚の繊維強化樹脂シートを前記ライナーの前記胴体部の軸心に対して直交する方向から複数回巻き付けることにより、筒状部を成形する工程と、
前記筒状部が成形された前記ライナーの両側の側端部に亘って、樹脂が含浸された連続繊維でヘリカル巻きすることにより、補強層を成形する工程と、を含み、
前記筒状部を成形する工程において、前記強化樹脂シートとして、前記繊維強化樹脂シートを巻きける際の前記胴体部の軸心方向に亘る前記繊維強化樹脂シートの巻き始めの幅が、前記軸心の方向に沿った前記胴体部の幅に一致し、前記繊維強化樹脂シートを巻き付けるに従って前記繊維強化樹脂シートの幅が狭くなるシートを用い
前記繊維強化樹脂シートの巻始めの両端の位置を、前記胴体部の両端に合わせて、前記繊維強化樹脂シートを前記胴体部に巻き付けることを特徴とするタンクの製造方法。
A method for manufacturing a tank comprising at least a liner having a tubular body portion and dome-shaped side end portions formed on both sides of the body portion,
A step of forming a tubular portion by winding one fiber reinforced resin sheet around the body portion a plurality of times in a direction orthogonal to the axis of the body portion of the liner;
Over the side edge portion of both sides of the liner the tubular portion is formed by helical winding with FRP impregnated with resin, and a step of forming the reinforcing layer,
In the step of forming the cylindrical portion, as the textiles reinforced resin sheet, the winding start of the width of the fiber-reinforced resin sheet across the axial direction of the body part when Keru with winding the fiber-reinforced resin sheet, Match the width of the body portion along the direction of the axis , using a sheet in which the width of the fiber reinforced resin sheet becomes narrower as the fiber reinforced resin sheet is wound ,
A method for manufacturing a tank , wherein the positions of both ends of the fiber-reinforced resin sheet at the beginning of winding are aligned with both ends of the body portion, and the fiber-reinforced resin sheet is wound around the body portion .
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