Injection molding apparatus

An injection molding apparatus for performing injection molding of a molded article using a mold, the injection molding apparatus comprising:

• an injection unit configured to inject a material of the molded article into the mold;
• a mold clamping unit to which the mold is attached and which clamps the mold;
• an optical measurement unit configured to optically measure the material;
• and
• a control unit configured to control the injection unit, the mold clamping unit, and the optical measurement unit;
• wherein
• the injection unit comprises a material supply unit configured to supply the material, a flow path through which the supplied material flows, and a nozzle configured to inject the material into the flow path,
• the optical measurement unit comprises a light guide unit configured to guide light into the flow path, an irradiation unit configured to irradiate the material with light via the light guide unit, and a Raman spectrometer configured to receive scattered light from the material via the light guide unit, and
• the control unit is configured to determine a state of the material based on a Raman spectrum obtained from the Raman spectrometer.