| 摘要 |
<p>PROBLEM TO BE SOLVED: To improve operation rate of a blow molder in its return a productivity while an unappropriate parison eliminating operation is unnecessitated by a method wherein even in the case where a condition which is easy to generate a curl back is satisfied, a parison of a specific length is enabled to be continuously molded. SOLUTION: In a crosshead of a blow molder which extrudes a cylindrical parison 34 from an annular outlet at a lower end part of a crosshead 1, a lower self-adhesive anti-adhesion layer than a lower surface of the crosshead 1 is formed on the lower surface of the crosshead 1 around the outlet 10, and the parison 34 to be extruded from the outlet 10 is prevented from being left as it stuck to the lower surface of the crosshead 1.</p> |
