Hot runner defect detection device

The utility model relates to the technical field of plastic hot melting detection. The hot runner defect detection device comprises a hot runner, including a housing, a first lug seat is arranged at the top of the shell; a camera is arranged on the first lug seat; a second lug seat is arranged on one side of the first lug seat; a telescopic rod is arranged on the second lug seat; a display is arranged on the side wall of the shell; a signal oscillation starting circuit is arranged at one end in the shell; the signal oscillation starting circuit is externally connected with a medium anode connector through a wire. An equivalent true value detector is arranged at the end, away from the signal oscillation starting circuit, in the shell, the equivalent true value detector is externally connected with a medium negative electrode connector through a wire, the equivalent true value detector is electrically connected with a digital conversion circuit through a wire, the digital conversion circuit is electrically conn