| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for forming an opening part of a blow molding by which an opening part of an outer wall of a fuel tank or the like can be easily cut off and easily forming the opening part.SOLUTION: A blow molding mold 20 is provided with a cutting space part 29 between an opening cylindrical part molding part 24 and a cut part holding part 22, and is provided with an opening part cutting blade 27 slidable through the cutting space part 29. The opening part all-around blade 27 is provided with an opening part cutting blade sliding space part 28c, and a gap part open/close member 30 capable of opening/closing the opening part cutting blade sliding space part. The surface where the opening part cutting blade sliding space part 28c and the space part opening/closing member 30 are abutted, is formed as an inclined surface. The inclined surface of the space part opening/closing member 30 slides to the inclined surface of the opening part cutting blade sliding space part 28c to be firmly attached. The opening part cutting blade sliding space part 28c is blocked with the space part opening/closing member 30 to make a parison 5 firmly attach thereto, the opening cutting blade 27 is slid, and the parison 5 of the opening cut part 17 is cut off with a cutting blade tip end part 27b.SELECTED DRAWING: Figure 4 |
