| 摘要 |
PROBLEM TO BE SOLVED: To decrease the amt. of generation of burrs and to avoid breakage of a blow nozzle. SOLUTION: After a parison 13 is arranged between opened division type molds 11, the parison 13 is pinched by closing the molds and at the same time, a cylindrical part 5 is formed in the recessed place 12a for forming the cylindrical part of a cavity 12. Thereafter, the small diameter part 14a of a blow nozzle 14 is inserted in the opening part of the cylindrical part 5 and the opening part of the cylindrical part 5 is sealed by pressing it between the shoulder part 14b of the blow nozzle 14 and the wall face of an inserting hole 11a for the blow nozzle of a mold 14b. Thereafter, a pressurized fluid is introduced from the blow nozzle 14 to perform blow molding and after the small diameter part 14a of the blow nozzle 14 is pulled out of the cylindrical part 5, the opening part of the cylindrical part 5 is closed by pinching and pressing it by a fusion means. |
