| 摘要 |
PURPOSE:To facilitate manufacture, and reduce the variance in the rate of discharging by forming a supplying flow passage for a liquid lubricant between a mold body and an attachable and detachable annular member, forming the part near the opening thereof into groove and providing multiple holes in the opening. CONSTITUTION:A clearance 6 is fromed between a mold body 1 and an annular member 2, and this clearance is a supplying flow passage for a liquid lubricant, for example, castor oil or the like, and opens to the inside surface of a force-cooled mold. The part near the opening of the supplying flow passage 6 is fromed with multiple grooves 7 in the body 1 at prescribed intervals in the radial direction from the center of the force-cooled mold and over the entire circumferernce. There are multiple holes of rectangular holes on the inside surface of the force-cooled mold in one row over the entire circumference. Thereby, the mold is made more easily than conventional force-cooled molds of hole types, and since the grooves can be worked to depth of good accuracy, there is no variance in the rate of discharging of the lubricant. |
