Integrally moulded thermoplastic pump rotor

摘要

The rotor consists of curved blades fixed between two plates. The plane of one of the plates is normal to rotor's axis while that of the other is inclined so that the rotor's cross section has a trapezoidal form. The trapezoidal form is such that extensions of the end discs converge towards the periphery. The curved blades are formed by suitably curved formers which are introduced in the mould radially. These plates are withdrawn at the completion of the process. The trapezoidal from is produced by a displacing plate which moves axially. The method produces accurately the required curvature and chamber shape in one setting.