| 摘要 |
PURPOSE:To obtain a rubber hose whose quality is uniform, by making the nipple angle on the extruding side smaller than the nipple angle on the feeding side in a nipple taper of a rubber hose extrusion molding aparratus thereby preventing inconvenience such as deformation of the inner diameter of a hose or clogging due to the collapse. CONSTITUTION:Unvulcanized rubber flows under the pressure of the extruder along the taper surface 15 having the nipple angle (B), and while it is acquiring an inertia as shown by the broken lines (X), it proceeds. As a taper surface 15a having the nipple angle (A) is provided on the taper surface 15, the direction of the inertia of the flowing unvulcanized rubber that has been given said inertia is corrected by the taper surface 15a. Therefore, the unvulcanized rubber that has flowed through the nipple 16 proceeds in a direction shown by the broken lines (Y), and the inner circumferential surface of the rubber hose formed by the nipple 16 would not be deformed radially, and it is passed to the subsequent step. |
