HEAT INSULATING CONTAINER AND METHOD OF MANUFACTURING THE SAME

摘要

A heat insulating container (A) suitable to hold instant food cooked in boiled water and beverage and food desirable to be drunk and eaten respectively while they are hot. The container (A) comprises a molded body of synthetic resin foam, in which an annular flange (4) is joined to an open edge part (11) of a bottomed cylindrical portion (1) with a cross-sectionally bent curl portion (5) the thickness of which is smaller than that of the bottomed cylindrical portion (1) joined to the flange (4). The thickness of the curl portion (5) is preferably set to not more than 1.5 mm. The manufacturing method comprises the steps of forming an intermediate molded body (7) of synthetic resin foam so that the thickness of a skirt portion (53) thereof is smaller than that of a trunk part (3) of the bottomed cylindrical portion (1), and feeding the skirt portion (53) sequentially while rolling the skirt portion in a groove (91) of a gradually decreasing width (W) in a mold (9) from the side of a larger width (W) thereof toward the side of a smaller width (W) thereof and heating the same skirt portion, so as to mold a cross-sectionally bent curl portion (5).