JP6710058B2 - フィラーチューブ及びその製造方法 - Google Patents
フィラーチューブ及びその製造方法 Download PDFInfo
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- JP6710058B2 JP6710058B2 JP2016032624A JP2016032624A JP6710058B2 JP 6710058 B2 JP6710058 B2 JP 6710058B2 JP 2016032624 A JP2016032624 A JP 2016032624A JP 2016032624 A JP2016032624 A JP 2016032624A JP 6710058 B2 JP6710058 B2 JP 6710058B2
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- filler tube
- outer peripheral
- thick
- molded body
- fuel tank
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Description
本発明に係るフィラーチューブは、燃料タンクの開口部に溶着される熱可塑性樹脂製のフィラーチューブである。溶着される前の前記フィラーチューブは、総肉厚2〜4mmの非蛇腹筒状の基本部と、総肉厚0.5〜3mmの蛇腹部と、総肉厚4〜6mmの非蛇腹状の厚肉筒部と、総肉厚3.5〜5mmであって、前記厚肉筒部の前記燃料タンク側の端から径方向外方に突出し、前記燃料タンクに溶着される端面を有するフランジ部と、を備える。
本発明に係るフィラーチューブの製造方法は、上述したフィラーチューブの製造方法であって、コルゲート金型を用いて、コルゲート成形により一次成形体を成形する一次成形工程と、外周型及び内周型を用いて、前記一次成形体にプレス加工を施すことにより前記フィラーチューブを成形する二次成形工程と、を備える。
前記二次成形工程は、所定温度とされた前記外周型が前記一次成形体の前記厚肉筒部の外周面を支持するように、前記一次成形体を前記外周型に配置する一次成形体配置工程と、前記一次成形体配置工程の後に、前記外周型の前記所定温度より高温とされた前記内周型を前記被成形部の内周側に挿入し、且つ、前記外周型及び前記内周型を軸方向に相対移動させて前記外周型の端面及び前記内周型が前記被成形部を軸方向に挟み込むことで前記フランジ部をフレア成形するフレア成形工程と、を備える。
燃料ライン1の構成について図1を参照して説明する。燃料ライン1とは、自動車において、給油口から内燃機関(図示せず)までのラインである。ただし、本実施形態においては、給油口20から燃料タンク10までを説明する。
フィラーチューブ30の構成について、図1〜図6を参照して説明する。フィラーチューブ30は、図1及び図2に示すように、非蛇腹筒状の基本部31、蛇腹部32、テーパ係止部33、非蛇腹状の厚肉筒部34、及び、フランジ部35を備える。基本部31、蛇腹部32、テーパ係止部33、厚肉筒部34及びフランジ部35の総肉厚T1,T2,T4,T5は、図3〜図6に示すとおりである。総肉厚は、厚肉筒部34、フランジ部35、基本部31、蛇腹部32の順に薄くなっていく。また、フィラーチューブ30は、図3〜図6に示すように、異種の熱可塑性樹脂による多層構造である。
フィラーチューブ30の製造方法について、図7のフローチャート、及び、図8〜図11を参照して説明する。まず、コルゲート金型を用いた押出しブロー成形(コルゲート成形)を行うことにより、図8に示す一次成形体130が成形される(S1:「一次成形工程」)。
上述したフィラーチューブ30は、熱可塑性樹脂製であって、燃料タンク10の開口部11に溶着される。溶着される前のフィラーチューブ30は、総肉厚2〜4mmの非蛇腹筒状の基本部31と、総肉厚0.5〜3mmの蛇腹部32と、総肉厚3.5〜5mmであって燃料タンク10に溶着される端面を有するフランジ部35とを備える。
Claims (10)
- 燃料タンクの開口部に溶着される熱可塑性樹脂製のフィラーチューブであって、
溶着される前の前記フィラーチューブは、
総肉厚2〜4mmの非蛇腹筒状の基本部と、
総肉厚0.5〜3mmの蛇腹部と、
総肉厚4〜6mmの非蛇腹状の厚肉筒部と、
総肉厚3.5〜5mmであって、前記厚肉筒部の前記燃料タンク側の端から径方向外方に突出し、前記燃料タンクに溶着される端面を有するフランジ部と、
を備え、
前記基本部、前記蛇腹部及び前記フランジ部は、
総肉厚の40〜60%の厚みに形成され、高密度ポリエチレン(HDPE)を主体として形成される内層と、
前記内層の外周側に配置され、耐燃料透過特性を有する中間層と、
前記中間層の外周側に配置され、前記中間層を保護する外層と、
を備える、フィラーチューブ。 - 前記中間層は、エチレン−ビニルアルコール共重合体(EVOH)及びポリアミド(PA)系の何れかを主体として形成され、
前記外層は、高密度ポリエチレン(HDPE)及びポリアミド(PA)系の何れかを主体として形成される、請求項1に記載のフィラーチューブ。 - 前記フランジ部は、前記厚肉筒部より薄く形成されている、請求項1又は2に記載のフィラーチューブ。
- 前記フランジ部は、
前記厚肉筒部の前記燃料タンク側の端から拡径するテーパ部と、
前記テーパ部の前記燃料タンク側の端から径方向外方に延在する円環板部と、
を備える、請求項3に記載のフィラーチューブ。 - 前記テーパ部及び前記円環板部は、前記厚肉筒部より薄く形成されており、
前記円環板部は、前記テーパ部より薄く形成されている、請求項4に記載のフィラーチューブ。 - 前記フィラーチューブは、前記蛇腹部の前記燃料タンク側の端に連設され、且つ、前記厚肉筒部の前記燃料タンクとは反対側に設けられ、前記基本部の一部としてのタンク側基本部を備える、請求項1−5の何れか一項に記載のフィラーチューブ。
- 前記タンク側基本部は、径方向外方に環状に突出するリブを備える、請求項6に記載のフィラーチューブ。
- 前記フィラーチューブは、
前記フィラーチューブの前記燃料タンクとは反対側の端に設けられ、相手部材が内部に圧入される部位であり、前記基本部の一部としての圧入基本部と、
前記圧入基本部に連設され、前記基本部の一部としての非圧入基本部と、
を備える、請求項1−7の何れか一項に記載のフィラーチューブ。 - 前記非圧入基本部は、中心軸線が湾曲した曲がり部を備える、請求項8に記載のフィラーチューブ。
- 請求項1−9の何れか一項に記載のフィラーチューブの製造方法であって、
コルゲート金型を用いて、コルゲート成形により一次成形体を成形する一次成形工程と、
外周型及び内周型を用いて、前記一次成形体にプレス加工を施すことにより前記フィラーチューブを成形する二次成形工程と、
を備え、
前記一次成形体は、前記基本部、前記蛇腹部、前記フランジ部がフレア成形される前の部位としての筒状の被成形部、及び、前記厚肉筒部を備え、
前記二次成形工程は、
所定温度とされた前記外周型が前記一次成形体の前記厚肉筒部の外周面を支持するように、前記一次成形体を前記外周型に配置する一次成形体配置工程と、
前記一次成形体配置工程の後に、前記外周型の前記所定温度より高温とされた前記内周型を前記被成形部の内周側に挿入し、且つ、前記外周型及び前記内周型を軸方向に相対移動させて前記外周型の端面及び前記内周型が前記被成形部を軸方向に挟み込むことで前記フランジ部をフレア成形するフレア成形工程と、
を備える、フィラーチューブの製造方法。
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