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) joined to the flange (4). A trunk part (3) of the bottomed cylindrical portion (1), annular flange (4) and curl portion (5) have an equal thickness, which is in the range of not more than 1.5 mm to be specific. The manufacturing method comprises the step of forming a curl portion (5) by feeding a skirt portion (53) of an intermediate molded body (7) of synthetic resin foam 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).