Compounder-type injection molding machine

An injection molding machine, comprising:

• an extruder for continuously producing a melt;
• at least one injection device fluidly connected with the extruder by a first conduit to receive melt for intermittent injection into an injection mold;
• a reservoir in fluid communication with the extruder as well as with the at least one injection device for temporary storage of melt;
• a pressure sensor, disposed in a location selected from the group consisting of inside the extruder and an area between the extruder and the reservoir, for ascertaining a melt pressure state downstream of an outlet of the extruder and outputting a signal commensurate with the melt pressure state;
• a control unit receiving the signal from the pressure sensor;
• and
• a regulating device, received in the reservoir and having a drive mechanism, for expelling melt from the reservoir or charging melt into the reservoir to a predetermined level, wherein the control unit is so constructed as to control the drive mechanism in response to the signal in accordance with a predetermined algorithm.