Motor core manufacturing device and motor core manufacturing method

A motor core manufacturing device, comprising:

• a mold configured to hold a motor core, the motor core including a resin filling portion;
• a chamber configured to communicate with a resin composition filling path, wherein the resin composition filling path is formed in the mold and one end portion of the resin composition filling path is configured to communicate with the resin filling portion;
• a plunger configured to convey a resin composition conveyed to the chamber toward the resin composition filling path;
• a first heater that is disposed in the mold, or in the mold and around the chamber;
• and
• an extruding machine configured to convey the resin composition, while kneading the resin composition, toward the chamber, and put a previously measured amount of the resin composition into the chamber as a paste-shaped resin composition.