| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for molding a synthetic resin tubular form by which the synthetic resin tubular form of an almost round shape is obtained by cooling the heated and unhardened synthetic resin tubular form while molding it into an almost round shape. SOLUTION: This method for molding the synthetic resin tubular form comprises the steps to place the heated and unhardened synthetic resin tubular form D on a molding holder 4, keep the tubular form D in a circular shape by enlarging the diameter of the molding holder 4 and pressing the inner peripheral face of the tubular form D and under this state, harden the tubular form D by cooling for a specified time and extract the tubular form D from the molding holder 4. Thus it is possible to cool the unhardened tubular form D of a non-round shape while molding it into the almost round shape and thereby securely obtain the tubular form D of the almost round shape.
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