JP2020164176A - プリフォーム組立体、二重容器及び二重容器の製造方法 - Google Patents
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Abstract
Description
前記プリフォーム組立体を延伸可能な温度に加熱してブロー成形し、前記外口部と該外口部に肩部を介して連なる有底筒状の胴部とを備えるとともに上下方向に延在する薄肉部又は厚肉部が前記肩部に設けられた外層体と、前記内口部と該内口部に連なるとともに前記肩部及び前記胴部の内面に剥離可能に積層された減容変形自在な収容部とを備えた内層体とを有し、前記外層体と前記内層体との間に連通する外気導入口が、前記外口部と該外口部の内側に配置された前記内口部とで構成される口部に設けられた二重容器とするブロー成形工程とを有することを特徴とする。
10 外層体
11 外口部
11a 雄ねじ
11b ネックリング
12 肩部
13 胴部
13a 底部分
14 外気導入口
20 内層体
21 内口部
21a フランジ
21b 上筒
21c 傾斜筒
21d 下筒
22 収容部
23 隙間
24 凸条
25 リブ
30 薄肉部
31 凹部
32 通気路
40 プリフォーム組立体
50 外プリフォーム
51 外口部
51a 雄ねじ
51b ネックリング
52 外気導入口
53 延伸部
53a 縮径部
53b 延伸部本体
60 内プリフォーム
61 内口部
61a フランジ
61b 上筒
61c 傾斜筒
61d 下筒
62 隙間
63 延伸部
64 凸条
70 薄肉部
71 凹条
72 口部
80 金型
80a キャビティ
80b キャビティ形成面
O 中心軸線
Claims (9)
- 筒状の外口部と該外口部に連なる延伸部とを備えるとともに上下方向に延在する凹条又は凸条が前記延伸部の内面に設けられた外プリフォームと、
筒状の内口部と該内口部に連なる延伸部とを備えた内プリフォームとを有し、
前記外プリフォームと前記内プリフォームとの間に連通する外気導入口が、前記外口部と該外口部の内側に配置された前記内口部とで構成される口部に設けられたことを特徴とするプリフォーム組立体。 - 前記外プリフォームの前記延伸部が、内径が前記外口部から下方に向けて徐々に縮径する縮径部を有し、
前記凹条又は凸条が、前記縮径部に設けられた、請求項1に記載のプリフォーム組立体。 - 前記外気導入口が、前記外口部を貫通する貫通孔で構成され、
上下方向に延在する凸条が、前記内プリフォームの外面に設けられた、請求項1又は2に記載のプリフォーム組立体。 - 筒状の外口部と該外口部に肩部を介して連なる有底筒状の胴部とを備えるとともに上下方向に延在する薄肉部又は厚肉部が前記肩部に設けられた外層体と、
筒状の内口部と該内口部に連なるとともに前記肩部及び前記胴部の内面に剥離可能に積層された減容変形自在な収容部とを備えた内層体とを有し、
前記外層体と前記内層体との間に連通する外気導入口が、前記外口部と該外口部の内側に配置された前記内口部とで構成される口部に設けられたことを特徴とする二重容器。 - 上下方向に延在するリブが、前記外層体の前記肩部に設けられた、請求項4に記載の二重容器。
- 前記外気導入口が、前記外口部を貫通する貫通孔で構成され、
上下方向に延在する凸条が、前記内口部の外面に設けられた、請求項4又は5に記載の二重容器。 - 筒状の外口部と該外口部に連なる延伸部とを備えるとともに上下方向に延在する凹条又は凸条が前記延伸部の内面に設けられた外プリフォームと、筒状の内口部と該内口部に連なる延伸部とを備えた内プリフォームとをそれぞれ形成し、前記外プリフォームの内側に前記内プリフォームを組み込んで、前記外プリフォームと前記内プリフォームとの間に連通する外気導入口が、前記外口部と該外口部の内側に配置された前記内口部とで構成される口部に設けられたプリフォーム組立体を形成するプリフォーム形成工程と、
前記プリフォーム組立体を延伸可能な温度に加熱してブロー成形し、前記外口部と該外口部に肩部を介して連なる有底筒状の胴部とを備えるとともに上下方向に延在する薄肉部又は厚肉部が前記肩部に設けられた外層体と、前記内口部と該内口部に連なるとともに前記肩部及び前記胴部の内面に剥離可能に積層された減容変形自在な収容部とを備えた内層体とを有し、前記外層体と前記内層体との間に連通する外気導入口が、前記外口部と該外口部の内側に配置された前記内口部とで構成される口部に設けられた二重容器とするブロー成形工程とを有することを特徴とする二重容器の製造方法。 - 前記プリフォーム形成工程において、上下方向に延在する凸条が外面に設けられた前記内プリフォームと、前記外気導入口を構成するための貫通孔が前記外口部に設けられた前記外プリフォームとにより、前記プリフォーム組立体を形成する、請求項6に記載の二重容器の製造方法。
- 前記ブロー成形工程において、上下方向に延在する凸条又は凹条がキャビティ形成面に設けられた金型により、前記キャビティ形成面の前記凸条又は凹条に対応するリブが前記外層体の前記肩部に形成された前記二重容器を形成する、請求項6又は7に記載の二重容器の製造方法。
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