| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for manufacturing a hollow molding having small deformation of a cut part generated by releasing an inner stress when the molding of thermoplastic resin is manufactured by cutting a continuous hollow molding in a specified length, excellent dimensional accuracy and external appearance. SOLUTION: When a continuous hollow molding is cut in a specified length, and the hollow molding made of thermoplastic resin is manufactured, the inner surface of the cut part of the molding is held at lower temperature than that of the outer surface, and the molding is cut when the inner surface of the cut part is held at the temperature that its Young's modulus becomes 0.8 to 1.5 times as large as the Young's modulus at 20 deg.C. |
