The utility model discloses an
injection molding machine for cable protection
pipe production, which comprises a feeding hopper, a melting mechanism, a cable protection
pipe mould and a hydraulic
system, the top end of the feeding hopper is closed, a negative pressure fan is arranged at the top end, an air suction port of the negative pressure fan is communicated with the feeding hopper, an air outlet of the negative pressure fan is communicated with the outside, and a material
pipe is arranged on the outer wall of the feeding hopper. A material pipe is arranged on the feeding hopper, a hose is arranged on the material pipe, a motor is arranged at the top end of the feeding hopper, a first
bevel gear is arranged at the output end of the motor, a second
bevel gear is meshed above the first
bevel gear, a rotating shaft is arranged at the bottom end of the second bevel gear, and the rotating shaft is rotationally connected into the feeding hopper. According to the feeding device, the negative pressure fan is arranged, negative pressure is formed in the feeding hopper in the starting process of the negative pressure fan, the plastic particles are sucked into the feeding hopper through the hose by connecting the material pipe and the hose, and therefore the feeding effect of the plastic particles is achieved, and compared with the prior art, operation is convenient, and the feeding efficiency is improved.