Power cord and its manufacturing method

A method of manufacturing a power cord including covering a base side of blades and a leading end side of the power cord with synthetic resin thereby forming a plug, comprising:

• a core forming process including placing the blades held in a specified interval spacing, and connected to plural conductors having an insulator positioned at the leading end side of the power cord, inside of a die,
• injecting a hard thermoplastic resin, from a base end of the blades to a leading end side of the power cord, into the die to form a core;
• and
• a plug forming process including placing the core inside of a die and injecting a soft thermoplastic resin into the die thereby forming the plug,
• wherein the method includes providing the core with covering parts corresponding to the number of plural conductors, the covering parts covering the base side of the blades and the insulator,
• wherein the method further providing the covering parts with a generally flat coupling part extending from a front end of the covering parts toward a rear end of the covering parts.