BLOW MOLDED BODY MANUFACTURING APPARATUS AND MANUFACTURING METHOD
To shorten a tact time in manufacturing of a blow molded article having an undercut portion.SOLUTION: A manufacturing apparatus 20 of a blow molding 10 includes a pair of molds 22 for surrounding a parison 11 and forming a welded portion 16 by flattening a part of the parison 11. A dome portion 13 (...
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| Format: | Patent |
| Sprache: | eng ; jpn |
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| Zusammenfassung: | To shorten a tact time in manufacturing of a blow molded article having an undercut portion.SOLUTION: A manufacturing apparatus 20 of a blow molding 10 includes a pair of molds 22 for surrounding a parison 11 and forming a welded portion 16 by flattening a part of the parison 11. A dome portion 13 (end part in an axial direction) of the blow molding 10 is formed by a part connected to the welded portion 16 in the parison 11 and an undercut portion 15 is formed in the dome portion 13. A pair of molds 22 includes: a pair of mold bodies 23; and a pair of nests 32 forming the undercut portion 15 in a state where the entire region of the welded portion 16 is sandwiched. The pair of nests 32 can be detached from the pair of mold bodies 23 while remaining in one piece with the blow molding 10.SELECTED DRAWING: Figure 2
【課題】アンダーカット部が形成されたブロー成形体の製造においてタクトタイムの短縮を図る。【解決手段】ブロー成形体１０の製造装置２０は、パリソン１１を包囲し、パリソン１１の一部を偏平に潰して溶着部１６を形成する一対の金型２２を備え、ブロー成形体１０のドーム部１３（軸線方向端部）をパリソン１１のうち溶着部１６に連なる部分によって形成し、ドーム部１３にアンダーカット部１５を形成する。一対の金型２２は、一対の金型本体２３と、溶着部１６の全領域を挟み付けた状態でアンダーカット部１５を形成する一対の入れ子３２とを備えて構成され、一対の入れ子３２は、ブロー成形体１０と一体の状態のままで一対の金型本体２３から離脱可能である。【選択図】図２ |
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