| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a method for forming an opening part of a blow molding which can facilitate cutting of an opening part of an outer wall of a fuel tank or the like to easily form the opening part.SOLUTION: In a method for forming an opening part of a blow molding, an opening part 10 includes an opening cylindrical part 11 and an opening cutting-off part 12. A blow molding die 20 is provided with an opening cylindrical part-molding part 24 and a cutting-off part-holding part 22. A clearance part 29 for cutting is provided between the opening cylindrical part-molding part 24 and the cutting-off part-holding part 22, and a clearance part-opening and closing member 30 is provided which can open and close the clearance part 29 for cutting. After the clearance part 29 for cutting is closed by the clearance part-opening and closing member 30, a parison 5 is introduced into the blow molding die 20, the clearance part-opening and closing member 30 is slid to open the clearance part 29 for cutting, and an opening part-cutting blade 27 is slid from the clearance part 29 for cutting to cut off the parison 5 in an opening cutting-off part 17 by a cutting blade tip part 27b.</p> |
