Method and apparatus of manufacturing electric pole

A method of manufacturing an electric pole, the method comprising the steps of:

• a) winding and welding an iron wire around a surrounding of a tensile core to form a frame, and heating and pressurizing both ends of the tensile core arranged in a longitudinal direction in the frame to form a head on one end thereof and a male threaded portion on the other end thereof;
• b) inserting the head of the tensile core into the proximal end plate and distal end tensile core, so that the head is caught into a fastening hole of the proximal end tensile core fixing plate, and inserting threading the male threaded portion of the tensile core into a female threaded hole of the distal end plate using a tensile nut, thereby seating the frame on an opened mold;
• c) lifting the distal end plate coupled to the distal end tensile plate through a coupling ring by rotating a tension shaft using a tensioner, so that a length of the tensile core extended to a bottom of the distal end plate is stretched to a position corresponding to a length of the electric pole;
• d) inputting concrete into the mold, and rotating the mold while the mold is closed using a centrifuge to form a hollow of a thickness corresponding to a defined thickness of the electric pole;
• e) curing the concrete in the mold to provide the electric pole with a desired strength;
• f) removing the electric pole from the mold by cutting the tensile core extended between the proximal end plate and the proximal end tensile plate and releasing the coupling ring;
• and
• g) after cutting the tensile core extending from the proximal end, and removing the distal end plate from the mold by releasing the tensile but cutting the tensile cores extending toward the proximal end, and curing the distal end and the natural to complete the electric pole.