Injection machine and method of adjusting viscosity of molten resin

A method of adjusting a viscosity of molten resin by an injection machine, the

• injection machine comprising:
• a heating barrel which heats a powder material, a binder, and a resin material to provide a molten resin;
• a screw mounted in the heating barrel to mix the resin material;
• a motor which drives the screw in rotation;
• a through-hole disposed on a side surface of the heating barrel;
• a pipe in which a solvent for adjusting a viscosity of the resin material is conducted, the pipe being connected to the through-hole;
• a filter disposed in the through-hole to prevent the resin material from leaking to the pipe;
• a valve disposed midway on a pipeline of the pipe;
• a reservoir disposed on an end of the pipeline of the pipe;
• a load-detecting part which detects a load value of the motor;
• a controlling part which sets a reference value with respect to a load of the motor;
• and
• a driving part which compares the detected load value with the reference value to drive the valve to carry out either one of supply or discharge of the solvent;
• the method comprising the steps of:
• a reference-value-setting step for setting the reference value by the controlling part;
• a detecting step for detecting a load value of the motor by the load-detecting part;
• a comparing step for comparing the detected load value with the reference value to output an output signal by the driving part;
• and
• a solvent-sending step for carrying out either one of supply or discharge of the solvent by the valve actuated based on the output signal.