Injection molding machines cannot store materials.

Will the temperature be insufficient? Usually he has temperature detection, or the nozzle is blocked. You can remove the nozzle, heat it with a brazier and try it with a copper rod.

First, separate the roller from the prefabricated seat and idle it to see if it rotates.

If you don't turn around and continue

Pre-form the storage horse and sit empty alone.

If the motor rotates, there is something wrong with the connecting shaft, and the roller bearing is broken and stuck.

If none of the above is correct, check the oil circuit and replace the back pressure valve.

From the point of view, if the magnetic valve shoots and retreats on the same valve, then the storage material is that the valve channel is O-shaped.

If the injection valve and the storage valve are the same, the injection in the normal working position is connected with T, and the inlet and storage port are sealed.