JP2006283968A - ガス容器の製造方法およびガス容器 - Google Patents
ガス容器の製造方法およびガス容器 Download PDFInfo
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- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/65—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles with a relative motion between the article and the welding tool
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- B29C65/1435—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface at least passing through one of the parts to be joined, i.e. transmission welding
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- B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
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- B29C65/1629—Laser beams characterised by the way of heating the interface
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
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- B29C65/1677—Laser beams making use of an absorber or impact modifier
- B29C65/168—Laser beams making use of an absorber or impact modifier placed at the interface
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- B29C65/72—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by combined operations or combined techniques, e.g. welding and stitching
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- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/02—Preparation of the material, in the area to be joined, prior to joining or welding
- B29C66/024—Thermal pre-treatments
- B29C66/0242—Heating, or preheating, e.g. drying
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B29C66/90—Measuring or controlling the joining process
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- B—PERFORMING OPERATIONS; TRANSPORTING
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Abstract
【解決手段】少なくとも一端側が略円筒状のライナ構成部材21,22同士を接合して構成される中空内部の樹脂ライナ11を有するガス容器1の製造方法であって、ライナ構成部材21,22同士の接合部分を予備加熱した後で、レーザ溶着により接合した。仮接合状態の樹脂ライナ11を回転させて、ヒータ90により予備加熱を行うと共に、ヒータ90の下流側のレーザトーチによりレーザ照射を行い、ライナ構成部材21,22同士を周方向に亘って接合する。
【選択図】図3
Description
ここで、「相対的に回転」には、ライナ構成部材同士を回転させること、予備加熱装置のみを回転させること、これら両者を互いに同方向にまたは逆方向に回転させること、が含まれる。
ここで、「相対的に回転」には、ライナ構成部材同士を回転させること、レーザ照射装置のみを回転させること、これら両者を互いに同方向にまたは逆方向に回転させること、が含まれる。もっとも、予備加熱装置およびレーザ照射装置の両方を回転させるよりも、ライナ構成部材同士を回転させた方が装置の構成上や制御上、煩雑せず簡易となり得る。
図1に示すように、ガス容器1は、全体として密閉円筒状の容器本体2と、容器本体2の長手方向の両端部に取り付けられた口金3,3と、を具備している。容器本体2の内部は、各種のガスを貯留する貯留空間5となっている。ガス容器1は、常圧のガスを充填することもできるし、常圧に比して圧力が高められたガスを充填することもできる。すなわち、本発明のガス容器1は、高圧ガス容器として機能することができる。
一方の接合部34は、所定の角度傾斜した接合端面51を有している。接合端面51は、ライナ構成部材21の端部が内側に向かって面取りされるように(逆テーパ状となるように)、ライナ構成部材21の端部に周方向に亘って形成されている。
レーザ透過性の熱可塑性樹脂としては、例えばポリエチレン、ポリプロピレン、ナイロン66などを挙げることができるが、これらにガラス繊維などの補強繊維や着色剤を添加したものであってもよい。例えば、レーザ透過性のライナ構成部材21は、白色、半透明または透明に形成される。
例えば、レーザ吸収性の熱可塑性樹脂は、レーザ透過性の熱可塑性樹脂と同一の樹脂で形成した場合には、レーザ透過性の熱可塑性樹脂よりもカーボンを多く添加することで形成される。したがって、レーザ吸収性のライナ構成部材22は、例えば黒色に形成される。
先ず、一対のライナ構成部材21,22および二つの口金3,3を成形する(S1)。このとき例えば、予め成形した一の口金3を金型内に配置し、この金型内にレーザ透過性の熱可塑性樹脂を射出して、ライナ構成部材21および口金3を一体成形する(インサート成形する。)。
次に、図5を参照して、第2実施形態に係るガス容器1の製造方法ついて相違点を中心に説明する。第1実施形態との相違点は、予備加熱装置としてのヒータ110の形状をコイル状としたことである。
次に、図6を参照して、第3実施形態に係るガス容器1の製造方法ついて相違点を中心に説明する。第1実施形態との相違点は、ヒータ90に代わる予備加熱装置として、熱風装置120を用いた点である。
次に、図7を参照して、第4実施形態に係るガス容器1およびその製造方法について相違点を中心に説明する。第1実施形態との相違点は、ガス容器1の構造として、接合部34,44同士の界面に発熱性材料130を設けたことである。なお、図7は、ガス容器1の接合部分を拡大して示す図2と同様の断面図である。
次に、図8を参照して、第5実施形態に係るガス容器1の製造方法について相違点を説明する。第4実施形態との相違点は、高周波誘導加熱装置140の高周波炉141内に加圧治具150を設置したことである。
次に、図9を参照して、第6実施形態に係るガス容器1について相違点を中心に説明する。第1実施形態との相違点は、ガス容器1の樹脂ライナ11を三つのライナ構成部材201,202,203より構成したことである。なお、図9では、補強層12については省略している。
次に、図10及び図11を参照して、第7実施形態に係るガス容器1の製造方法について相違点を説明する。第1実施形態との相違点は、レーザトーチ100が予備加熱装置を兼ねることと、水分を測定する非接触式の水分測定装置300を設けたことである。
上記した本発明のガス容器1の製造方法では、様々な製造設備を用いて行うことができる。例えば、第1実施形態の仮接合状態の樹脂ライナ11をチャンバー内に配置して、チャンバー内を不活性ガス雰囲気下または真空状態にして、接合部34,44同士を予備加熱およびレーザ溶着するようにしてもよい。こうすることで、大気よりも低酸素雰囲気下でレーザ溶着されるため、各接合部34,44の酸化を抑制することができ、接合精度をより一層を高めることができる。
Claims (14)
- 少なくとも一部が中空円筒状のライナ構成部材を、複数個接合して構成される樹脂ライナを有するガス容器の製造方法であって、
前記複数のライナ構成部材同士の接合部分は、予備加熱されている途中でまたは予備加熱された後で、レーザを照射されることによりレーザ溶着で接合されたガス容器の製造方法。 - 少なくとも一部が中空円筒状のライナ構成部材を、複数個接合して構成される樹脂ライナを有するガス容器の製造方法であって、
互いに接合されるべき二つのライナ構成部材の少なくとも一方を予備加熱する予備加熱工程と、
前記予備加熱工程の途中でまたは前記予備加熱工程の後で、レーザを照射することにより、接合対象となる接触状態のライナ構成部材同士をレーザ溶着で互いに接合するレーザ照射工程と、
を有するガス容器の製造方法。 - 前記予備加熱工程は、互いに接合されるべき一方のライナ構成部材の接合部と、他方のライナ構成部材の接合部との少なくとも一方を予備加熱することで行われ、
前記レーザ照射工程は、接触状態の接合部同士をレーザ溶着で互いに接合することで行われる請求項2に記載のガス容器の製造方法。 - 前記予備加熱工程は、接触状態の接合部同士を予備加熱することで行われる請求項3に記載のガス容器の製造方法。
- 前記予備加熱工程は、接触状態のライナ構成部材同士の内側および外側の少なくとも一方から、接触状態の接合部同士を加熱することで行われる請求項4に記載のガス容器の製造方法。
- 前記予備加熱工程は、熱源を有する予備加熱装置に対し、接触状態のライナ構成部材同士を相対的に回転させながら、接触状態の接合部同士を周方向に亘って予備加熱することで行われる請求項5に記載のガス容器の製造方法。
- 前記レーザ照射工程は、レーザを照射するレーザ照射装置に対し、接触状態のライナ構成部材同士を相対的に回転させながら、接触状態の接合部同士を周方向に亘って予備加熱することで行われる請求項6に記載のガス容器の製造方法。
- 前記予備加熱装置は、接触状態のライナ構成部材同士の回転方向において、前記レーザ照射装置の上流側に位置している請求項7に記載のガス容器の製造方法。
- 前記予備加熱工程を実行する予備加熱装置は、ヒータ、熱風装置、高周波誘導加熱装置及びレーザ照射装置の少なくとも一つである請求項2ないし8のいずれか一項に記載のガス容器の製造方法。
- 前記予備加熱工程に先立ち、互いに接合されるべき一方のライナ構成部材の接合部と、他方のライナ構成部材の接合部との少なくとも一方に発熱性材料を設ける工程を、更に有する請求項2ないし9のいずれか一項に記載のガス容器の製造方法。
- 前記発熱性材料は、セラミックス、黒鉛、樹脂および金属の少なくも一つである請求項10に記載のガス容器の製造方法。
- 前記予備加熱工程に先立ち、互いに接合されるべき一方のライナ構成部材の接合部をレーザ透過性の部材で構成すると共に、他方のライナ構成部材の接合部をレーザ吸収性の部材で構成する工程を、更に有し、
前記レーザ照射工程は、前記レーザ透過性の部材からなる接合部側からレーザを照射することで行われる請求項2ないし11のいずれか一項に記載のガス容器の製造方法。 - 前記予備加熱工程は、ライナ構成部材の接合部の水分を測定する水分測定装置の測定結果に応じて、予備加熱することで行われる請求項2ないし12のいずれか一項に記載のガス容器の製造方法。
- 少なくとも一部が中空円筒状のライナ構成部材を、複数個接合して構成される樹脂ライナと、
前記樹脂ライナの外周に配置された補強層と、
を有するガス容器であって、
一のライナ構成部材の接合部と他のライナ構成部材の接合部とが接合された接合部分は、
この接合部同士をレーザ溶着により互いに接合したレーザ溶着部と、
前記レーザ溶着部と一体的にまたはその近傍に設けられた発熱性材料と、
を有しているガス容器。
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