| 摘要 |
PROBLEM TO BE SOLVED: To provide a manufacturing method which enables manufacture with high efficiency of a thermoplastic resin vessel of which the whole, including a flange, has a sufficient heat resistance as occasion demands, in addition to that it is free of a problem in a manufacturing method wherein first a sheet is extruded. SOLUTION: A preform is prepared by injection molding and a flange part of the preform is crystalLized. In a thermoforming process, subsequently, the preform is formed in a forming shape of a female forming tool member heated to a crystallization start temperature or above and a melting point or below, by air-pressure forming and/or vacuum forming, and is also fixed thermally. Then, it is shrunk back for shaping into a forming shape of a plug member and also cooled down. COPYRIGHT: (C)2004,JPO&NCIPI |
