Method of manufacturing formed articles, equipment for practicing same, and formed articles manufactured by the method

摘要

A thin sheet having a low rigidity is drawn while being depressed over the radiused corner of a die by elastic force to obtain a formed article whose sidewall part and flange part have no wrinkles. The force is applied through an elastic rubber provided around the punch and having an outside diameter larger than the inside diameter of the die cavity. The hardness of rubber is preferably approximately 70 to 85 in accordance with ASTM D 2240 Durometer A. A laminate not more than about 200 mu m in thickness and consisting of a thermoplastic resin film, aluminum foil and a heat-sealable resin film is drawn into a formed article or a container which is light in weight and suitable for containing foods, for instance.