| 摘要 |
A screw feed apparatus for conveying flowable materials in an extrusion or moulding machine comprises a rotatable helical feed screw (16) located in a cylindrical barrel (15) which has an inlet opening (28) and an outlet (31) spaced along the axis of the barrel from the inlet opening. The screw (16) is displaceable bodily, axially along the barrel as a direct consequence of the pressure exerted on the screw by the material being conveyed. Speed control for the screw, is based on a monitoring of the axial position of the screw (16) in its barrel (15). <IMAGE> |
