Resin molded air pump

A method of a removing liquid from a first air gap between a rotor and a stator comprising:

• rotating the rotor at or above a threshold non-zero speed, where the rotor comprises a first stack of laminations and a second stack of laminations with an air pump therebetween, where the air pump includes a plurality of fins extending radially from a collar, where the collar is rigidly coupled to and extends from the first stack, and the fins are joined to molded material housed via pockets of the first stack;
• generating an airflow through a plurality of second air gaps between the fins via rotating the rotor, creating suction between the fins;
• creating suction at a plurality of first holes of the first stack in fluid communication with the second air gaps between the fins via the airflow;
• pumping gaseous fluid through the first stack through the first holes via the airflow and suction toward the air pump;
• pumping gaseous fluid from the first holes and outward from the pump with a blowing force greater than threshold non-zero force;
• and
• blowing liquid occupying the air gap out of the air gap and out of contact with the stator and rotor.

A method of assembling a rotor core, comprising:

• securing and centering a collar around an axis, where the collar is a rotor core collar coupleable to one or more stacks of laminations of the rotor core;
• coupling a first stack of laminations to the collar, via translating the first stack around the collar along the axis, and securing the first stack to a position around the collar and the axis preventing further translation therein;
• arranging a molding tool around a section of the collar exposed from the first stack, where the section extends along and is centered around the axis from an end of the first stack;
• aligning the molding tool such that a plurality of cavities of the molding tool are in volumetric communication with a plurality of grooves of the collar and pockets of the first stack, each of the cavities and the grooves create mold forms in a desired shape for a plurality of fins arrange radially around the section, and a plurality of holes are in fluid communication with gaps radially between the cavities;
• filling the pockets of the first stack with a molding material;
• filling the mold forms created between the cavities and the grooves with the molding material;
• bonding the molding material filling volumes first stack and volumes of collar and the molding tool, more specifically bonding the molding material filling the cavities and the mold forms;
• curing the molding material until the molding material housed via the mold forms has solidified into a molded material forming into the fins, where the fins are extending radially from the section;
• removing the molding tool from around the section and the fins;
• arranging a second stack radially around the axis;
• sandwiching the section between the first stack and the second stack;
• and
• rigidly coupling the first stack to the second stack via the section, forming and sandwiching an air pump therebetween the first stack and the second stack from the section and the fins.