JP2022132937A - 高圧タンクの製造方法 - Google Patents
高圧タンクの製造方法 Download PDFInfo
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Abstract
Description
図1に示すように、高圧タンク1は、両端がドーム状に丸みを帯びた略円筒形状の高圧ガス貯蔵容器である。高圧タンク1は、ガスバリア性を有するライナー2と、ライナー2の外面を覆う繊維強化樹脂からなる補強部3と、を少なくとも備えている。高圧タンク1の一方端には、開口部が形成されており、開口部周辺には口金4が取り付けられている。
次に、本発明の一実施形態に係る高圧タンク1の製造方法について説明する。図2は、高圧タンク1の製造方法の工程を説明するフロー図である。高圧タンク1の製造方法は、図2に示すように、筒部材作製工程S1と、ドーム部材作製工程S2と、接合体作製工程S3と、第2補強層形成工程S4と、ライナー形成工程S5とを含んでいる。
図2に示す筒部材作製工程S1では、図3に示すように、第1の熱硬化性樹脂が含浸された連続繊維f1を周方向に沿って巻回した筒状の巻回体31Aを作製し、巻回体31Aに含まれる第1の熱硬化性樹脂を熱硬化させて、筒部材31を作製する。作製した筒部材31は、後の工程において、第1補強層30となる。
図2に示すドーム部材作製工程S2では、第1補強層30となる一対のドーム部材32、33を形成する。具体的には、まず、図6に示すように、たとえばフィラメントワインディング法(FW法)により、熱硬化性樹脂が含浸された繊維束F2をマンドレル200の外面に巻回する。
次に、図2に示すように、接合体作製工程S3を行う。この工程では、図8に示すように、筒部材31の両端部31a、31aに一対のドーム部材32、33を接合する。具体的には、筒部材31の各端部31aに、各ドーム部材32(33)の周端部32a(33a)を接合する。これにより、第1補強層30に相当する接合体30Aを作製する。本実施形態では、接合体30Aの筒部材31の外面には、表面層31Bが露出している。
次に、図2に示すように、第2補強層形成工程S4を行う。この工程では、図8および図9に示すように、接合体30Aに対して、一対のドーム部材32、33をわたすように、第2の熱硬化性樹脂が含浸された繊維束F3をヘリカル巻きで巻回する。巻回後、巻回された繊維束F3に含まれる第2の熱硬化性樹脂を熱硬化させて、第2補強層34を形成する。第2補強層34を形成することにより、第1補強層30および第2補強層34を有する補強部3を形成することができる。
次に、図2に示すように、ライナー形成工程S5を行う。この工程では、図11および図1に示すように、第2補強層34が形成された接合体30Aにおいて、接合体30Aの内面を覆うように、ライナー2を形成する。
発明者等は、筒部材作製工程S1で説明した筒部材31の作製方法に沿って、筒部材31に対応する試験材を作製して、表面層31Bの形成を確認する試験を行った。
図12~図14を参照して、参考実施形態について説明する。上述した実施形態では、固体硬化剤Cを用いて、筒部材31の表面に表面層31Bを形成したが、参考実施形態では、筒状の巻回体31Aの熱硬化の際に加熱量を調整することにより、筒部材31の表面に表面層31Bを形成する。以下に、相違点について主に説明し、上述した実施形態と同じ部材および部分に関しては、同じ符号を付してその詳細な説明は省略する。
Claims (2)
- 繊維強化樹脂からなる第1補強層と、前記第1補強層を覆うように形成され、繊維強化樹脂からなる第2補強層とを有した高圧タンクの製造方法であって、
前記製造方法は、
第1の熱硬化性樹脂が含浸された連続繊維を周方向に沿って巻回した筒状の巻回体を作製し、前記巻回体に含まれる前記第1の熱硬化性樹脂を熱硬化させて、筒部材を作製する工程と、
前記筒部材の両端部に一対のドーム部材を接合することにより、前記第1補強層に相当する接合体を作製する工程と、
前記接合体に対して、前記一対のドーム部材をわたすように、第2の熱硬化性樹脂が含浸された繊維束をヘリカル巻きで巻回し、巻回された前記繊維束に含まれる前記第2の熱硬化性樹脂を熱硬化させて、前記第2補強層を形成する工程と、を少なくとも含み、
前記第1の熱硬化性樹脂として、前記第1の熱硬化性樹脂の樹脂前駆体からなる主剤と、前記樹脂前駆体同士を化学的に結合する粒状の固体硬化剤とを含む熱硬化性樹脂を用いることを特徴とする高圧タンクの製造方法。 - 前記固体硬化剤の粒径は前記連続繊維同士の間の隙間よりも大きいことを特徴とする請求項1に記載の高圧タンクの製造方法。
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