JP2023031974A - タンクの製造方法および製造装置 - Google Patents
タンクの製造方法および製造装置 Download PDFInfo
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Abstract
Description
まず、本発明の実施形態に係る高圧タンク10の構造について、図面を基に詳細に説明する。図1、図2はそれぞれ、本実施形態に係る高圧タンク10(繊維が巻回されたライナー)を模式的に示す側面図、断面図である。なお、説明の便宜上、各図において適宜示す矢印Dを高圧タンク10の軸方向、矢印Rを高圧タンク10の径方向とする。また、高圧タンク10の中心軸CLの軸方向で、高圧タンク10(ライナー12)の中心から離れる側を「軸方向端部側」とする。また、それとは逆に高圧タンク10(ライナー12)の中心へ近づく側を「軸方向中央部側」とする。また、本実施形態に係る高圧タンク10は、その内部に、例えば燃料としての水素が充填されるようになっており、燃料電池車(図示省略)等に搭載されるようになっている。
以上のような構成とされた高圧タンク10の製造方法について、図面を基に詳細に説明する。
本実施形態に係る高圧タンク10は、まず、ライナー12の外周面に繊維16を巻き付けることで構成される。すなわち、図3~図5に示されるように、製造装置40の複数のボビン42、44から順次繊維16が繰り出され、まず一方のドーム部12Bの外周面にその繊維16をブレーディング巻きしてブレーディング層17Bを形成する(第1工程)。詳しくは、ドーム部12Bの直胴部12A側とは反対側の端部から直胴部12A側の端部まで、順次繊維16をブレーディング巻きしてブレーディング層17Bを形成する。
上記のようにして、中空のライナー12に繊維16が巻き付けられて繊維層17が形成されたプリフォーム11(図7~図10)を、製造装置としての樹脂含浸成形用金型50内(下型60と上型80との間、キャビティーともいう)に配置し、金型50内に熱硬化性樹脂18を注入し、繊維層17(を構成する繊維16)に熱硬化性樹脂18を含浸させて加熱し、硬化させる。
11 プリフォーム
12 ライナー
12A 直胴部
12B ドーム部
12C 円筒部
16 繊維
17 繊維層
17A ヘリカル層(第2繊維層)
17B ブレーディング層(第1繊維層)
18 熱硬化性樹脂(樹脂)
50 金型
60 下型
72A、72B ランナー
74A、74B ゲート
76 開閉機構
80 上型
CL 中心軸
Claims (10)
- 筒状の直胴部と、該直胴部の軸方向の端部から該直胴部とは反対側に向かうに従って徐々に窄まるドーム部とを有する中空のライナーの外表面に、繊維を径方向に重ねて巻き付けて成る繊維層に、樹脂を含浸して成る補強層が形成されたタンクの製造方法であって、
前記ドーム部の外表面における第1繊維層が前記直胴部の外表面における第2繊維層よりも粗となるように、且つ、前記第2繊維層の積層間の一部に前記第1繊維層から連続して前記粗となる前記第1繊維層の積層の一部を介在させるように、前記ライナーの外表面に前記繊維を径方向に重ねて巻き付ける工程と、
前記第1繊維層および前記第2繊維層を含む前記繊維層に前記樹脂を含浸させる工程と、を含むことを特徴とするタンクの製造方法。 - 請求項1に記載のタンクの製造方法において、
前記繊維層への前記樹脂の含浸を、前記ライナーの軸方向と径方向とで別々に行うことを特徴とするタンクの製造方法。 - 請求項2に記載のタンクの製造方法において、
前記第1繊維層へ前記ライナーの軸方向に前記樹脂を注入して前記繊維層に前記樹脂を含浸させ、
前記第2繊維層へ前記ライナーの径方向に前記樹脂を注入して前記繊維層に前記樹脂を含浸させることを特徴とするタンクの製造方法。 - 請求項2に記載のタンクの製造方法において、
前記繊維層への前記樹脂の含浸を、前記ライナーの軸方向で行った後、前記ライナーの軸方向および径方向の両方向で行うことを特徴とするタンクの製造方法。 - 請求項2に記載のタンクの製造方法において、
前記第1繊維層へ前記ライナーの軸方向に前記樹脂を注入した後、
前記第1繊維層へ前記ライナーの軸方向に前記樹脂を注入しつつ、前記第2繊維層へ前記ライナーの径方向に前記樹脂を注入して、前記繊維層に前記樹脂を含浸させることを特徴とするタンクの製造方法。 - 請求項1に記載のタンクの製造方法において、
前記ドーム部の外表面に繊維を互い違いに編まれるように巻き付けることで前記第1繊維層を構成し、
前記直胴部の外表面に前記第1繊維層から連続して繊維をヘリカル状またはフープ状に巻き付けることで前記第2繊維層を構成し、
前記第2繊維層の積層間の一部に前記第1繊維層から連続して繊維を互い違いに編まれるように巻き付けることで前記粗となる前記第1繊維層の積層の一部を介在させることを特徴とするタンクの製造方法。 - 筒状の直胴部と、該直胴部の軸方向の端部から該直胴部とは反対側に向かうに従って徐々に窄まるドーム部とを有する中空のライナーの外表面に、繊維を径方向に重ねて巻き付けて成る繊維層に、樹脂を含浸して成る補強層が形成されたタンクの製造装置であって、
前記ドーム部の外表面における第1繊維層が前記直胴部の外表面における第2繊維層よりも粗となるように、且つ、前記第2繊維層の積層間の一部に前記第1繊維層から連続して前記粗となる前記第1繊維層の積層の一部を介在させるように、前記ライナーの外表面に前記繊維を径方向に重ねて巻き付けたプリフォームを収容し、前記第1繊維層および前記第2繊維層を含む前記繊維層に前記樹脂を含浸させるための金型を備え、
前記金型に、前記繊維層への前記樹脂の含浸を、前記ライナーの軸方向と径方向とで別々に行うべく、前記樹脂が流動するとともに前記金型内に開口するゲートを形成するランナーが複数本設けられるとともに、前記複数本のランナーの少なくとも一つに開閉機構が設けられていることを特徴とするタンクの製造装置。 - 請求項7に記載のタンクの製造装置において、
前記複数本のランナーは、前記第1繊維層へ前記ライナーの軸方向に前記樹脂を注入する第1ランナーと、前記第2繊維層へ前記ライナーの径方向に前記樹脂を注入する第2ランナーと、を含んで構成されることを特徴とするタンクの製造装置。 - 請求項7に記載のタンクの製造装置において、
前記開閉機構は、前記繊維層への前記樹脂の含浸を、前記ライナーの軸方向で行った後、前記ライナーの軸方向および径方向の両方向で行うように、前記複数本のランナーの少なくとも一つを開閉することを特徴とするタンクの製造装置。 - 請求項7に記載のタンクの製造装置において、
前記複数本のランナーは、前記第1繊維層へ前記ライナーの軸方向に前記樹脂を注入する第1ランナーと、前記第2繊維層へ前記ライナーの径方向に前記樹脂を注入する第2ランナーと、を含んで構成され、
前記開閉機構は、少なくとも前記第2ランナーに設けられ、
前記開閉機構によって前記第2ランナーを閉じた状態で、前記第1ランナーを介して、前記第1繊維層へ前記ライナーの軸方向に前記樹脂を注入した後、前記開閉機構によって前記第2ランナーを開いた状態で、前記第1ランナーを介して、前記第1繊維層へ前記ライナーの軸方向に前記樹脂を注入しつつ、前記第2ランナーを介して、前記第2繊維層へ前記ライナーの径方向に前記樹脂を注入することを特徴とするタンクの製造装置。
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