The unit melts electrolytic copper into liquid through an industrial frequency induction furnace, isolates it from the air by covering the surface with charcoal or injecting coal gas (to prevent oxidation of the copper liquid), and controls the temperature of the copper liquid at 1150℃+10℃ through a holding furnace. The continuous casting machine quickly forms copper bars in the bar casting device to continuously produce copper bars, which are finally loaded into discs through auxiliary equipment such as a single-head bar bending machine.