| 摘要 |
PROBLEM TO BE SOLVED: To provide a molding method of a cylindrical molded aritcle, by which the molded article of a favorable quality can be easily obtained by facilitating the removal from a mold. SOLUTION: For this molding method, after forming a cylindrical molded article 20 on the internal surface 11 of a mold, a suction pipe 40, on the outer peripheral surface of which, an uneven shape 41 going in the peripheral direction, and a plurality of gas circulating holes 4 are provided, having an outer diameter smaller than the inner diameter of the molded article 20, is inserted in the molded article 20 in the mold 10, and air between the suction pipe 40 and the molded article 20 is drawn to the outside through the gas circulating holes 42 on the suction pipe, by a suction device 30 which is connected to the suction pipe 40. Then, after drawing the molded article 20 on the outer peripheral surface of the uneven shape 41 of the suction pipe, the suction pipe 40 is removed from the mold 10 while drawing the molded article 20, and the molded article 20 is removed from the mold. |
