Method of making molded resin motor housing
AssigneeWebster Plastics
InventorEdward C. McManus
Life of this patent
Estimating the term…
Abstract
An electric motor housing assembly (10) for electromechanical drives in automobiles is injection molded from a resin material. An armature bearing (18), mounting holes (30), and a flux ring (38) are molded in place within a housing (12) so that inner cylindrical surfaces (20 and 40) of the armature bearing and flux ring are centered with respect to the mounting holes (30) along a central axis (34). Protrusions (52 and 52) are molded through openings in the flux ring (38) for holding permanent magnets (44 and 46) in place against the flux ring.
Claims16
A method of making an electric motor housing having an open end for receiving a cover comprising the steps of:
- mounting a flux ring having an inner cylindrical surface on one portion of a mold core part;
- closing a mold cavity part about the flux ring;
- injection molding a housing between the mold parts including molding alignment elements at the open end of the housing for positioning the cover;
- opening the mold cavity part;
- removing the core mold part leaving the inner cylindrical surface of the flux ring centered in the housing with respect to the alignment elements at the open end of the housing;
- said step of injection molding including molding protrusions through openings in the flux ring for holding magnets in place within the housing;
- and
- press fitting the magnets in place against the flux ring.
A method of making an electric motor housing having an open end for receiving a cover comprising the steps of:
- mounting a flux ring having an inner cylindrical surface on one portion of a mold core part;
- closing a mold cavity part about the flux ring;
- injection molding a housing between the mold parts including molding alignment elements at the open end of the housing for positioning the cover;
- opening the mold cavity part;
- and
- removing the core mold part leaving the inner cylindrical surface of the flux ring centered in the housing with respect to the alignment elements at the open end of the housing, wherein
- said step of injection molding includes molding openings in the housing for exposing the flux ring within an exterior surface of the housing.
A method of making an electric motor housing comprising the steps of:
- mounting a flux ring on a mold core part;
- closing a mold cavity part around the flux ring;
- compressing portions of the flux ring between the mold core part and projections of the mold cavity part for imparting a final shape to the flux ring;
- injection molding a housing within the mold cavity part;
- opening the mold cavity part leaving windows formed in the housing for exposing the compressed portions of the flux ring;
- and
- removing the mold core part leaving the flux ring mounted within the housing.
Dependencies are inferred from the claim text.