| 摘要 |
PURPOSE:To contrive to make a heating oven more compact and prevent the poor and ununiform shrinkage of a molded part from occurring by a method wherein the molded part is shrunk by heating under the state of being wound around a rotator, the outer peripheral part of which consists of an elastic body. CONSTITUTION:A molded part 2 enters through the inlet 12 of an heating oven 6 in the oven and winds spirally around an elastic body 11 consisting of the outer periphery of a rotator 7 from one end side of the rotator 7 so as to be carried in the oven 6 with rotation of the rotator 7. The molded part 2 is unwound from the rotator 7 at the other end of the rotator so as to be discharged through the outlet 13 of the heating oven 6. The molded part 6 is shrunk by heating under the state of being wound around the rotator 7 in the heating oven 6 heated at the predetermined temperature. Because the outer periphery of the rotator 7 consists of the elastic body 11, the diameter of the molded part 2 can surely be shrunk without being restricted by the rotator 7, resulting in enabling to realize the full and uniform longitudinal shrinkage of the molded part. |
