Method of molding progressive cavity pump stators

Details Method of molding progressive cavity pump stators Method of molding progressive cavity pump stators

B - Operations, Transporting

29

C

B29C 45/06 (2006.01) F04C 5/00 (2006.01)

Patent

CA 2510716

Devices and methods for construction of a stator for a progressive cavity pump without the off centering effect created by gravity. A stator mold is assembled by placing a center section, or core, inside an outer stator housing tube to form a mold assembly. The core has a narrow central portion and a cone-shaped end portion at each axial end. The end assemblies provide an interference fit within the outer housing tube and retain the narrow central portion centrally within the housing tube. A mold space, or injection space, is defined between the housing tube and the core. Traveling spacers are disposed within the mold injection space and are capable of lateral movement therewithin. During injection molding and curing, the mold assembly is oriented in a substantially horizontal position and rotated about its central longitudinal axis.

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