Injection molding machine with injection molding nozzle protection mechanism

The utility model discloses an injection molding machine with an injection molding nozzle protection mechanism, which comprises a bottom plate, a stirring and heating mechanism is arranged at the top of the bottom plate, an injection molding mechanism is arranged at one end, far away from the stirring and heating mechanism, of the top of the bottom plate, the stirring and heating mechanism comprises a heating and pushing assembly and a stirring assembly, and the heating and pushing assembly is arranged at the bottom of the stirring assembly. A threaded pipe is slidably connected to the exterior of a heating pipe, and a replacement head is in threaded connection to the exterior of the threaded pipe, so that when the injection molding device needs to be used, a spring buffers injection molding pressure, the replacement head can be replaced, an injection molding head can be protected, and a motor is driven to enable a worm wheel to drive a stirring plate to rotate in a stirring barrel; and a mold at the top of a