| 摘要 |
PURPOSE:To minimize material consumption quantity by heating to form a synthetic resin cylinder having a depositing line which has a J-packing along the axial line direction and pressurizing to form a metal cylinder having a depositing line which has a first and a second supporting members along the axial line direction. CONSTITUTION:In manufacturing a J-packing 3, a band type sheet 13 is first made from cylindrical raw material made of fuoroplastics. Next both ends of the sheet are deposited to form a cylinder 15 having a depositing line 14 along the axial line direction. And in forming a first supporting member 4 and a second supporting member 5, a metal band type raw material is cut to a predetermined length to form a sheet, and both the ends of the sheet are welded to form a cylinder 19 having a depositing line 18 along the axial line direction. |
