| 摘要 |
PURPOSE:To vary the width of a groove freely by providing a saw tooth-shaped groove combining a parallel face and an inclined face axially on the inner surface of a cylinder to insert a saw tooth-shaped cylinder inscribing it. CONSTITUTION:As a saw tooth-shaped cylinder 6 is moved into a saw tooth- shaped cylinder 5 with the same shape in the direction of (C), the groove width (A) narrows while moved in the direction of (d), the groove width (A) broadens. The friction force of the grooved cylinder 5 can be changed by varying the groove width (A) thereof 5 to obtain a feeding force to match the characteristic of a resin thereby enabling a pressure control ahead of the supply section. |
