Injection molding plastic parts includes furnishing resin material to a screw barrel having a rotatable screw therewithin, rotating the screw to work the resin material into a molten state, furnishing additive such as liquid color or another additive to the screw barrel interior at a first rate during screw rotation and driving the screw longitudinally from a first position to a second position to force an additive-resin material mixture resulting from screw rotation into a mold while furnishing additive with resin to the screw barrel interior at a second additive addition rate.

The molding support device for an injection molding machine is provided with: a temperature control unit which controls the temperature of a material supply unit which supplies a resin material to the inside of a heating cylinder; a basic data input unit which can input resin type; a Controlled temperature data table in which the optimum control temperature by the temperature control unit is set for each resin type; a data processing unit having a temperature setting processing unit which sets the control temperature of the temperature control unit as the control temperature of the temperature control unit by reading the control temperature corresponding to resin type input from the Controlled temperature data table if the resin type is input from the basic data input unit when molding conditions are set, and a molding machine controller having an output processing function unit which displays the control temperature on a display.

A plasticizing device includes: a material storage unit having a charging port and configured to store pellet-shaped resin pellets; a plasticizing unit having a supply port in communication with the charging port and configured to plasticize at least a part of the resin pellets to generate a shaping material; a coupling pipe having a coupling path coupling the charging port and the supply port; a first material sensor configured to detect a remaining quantity of the resin pellets in the coupling path; and a control unit. The material storage unit includes a material supply mechanism configured to supply the resin pellets to the coupling path, and when the remaining quantity of the resin pellets detected by the first material sensor is less than a first reference value, the control unit controls the material supply mechanism to supply a predetermined quantity of the resin pellets to the coupling path.

A mechanical property inspection device is a mechanical property inspection device for inspecting the mechanical property of a molded article obtained by injection molding a resin material, and includes a spectral image acquisition section that acquires spectral images for a plurality of spectral wavelengths for the molded article; a spectral calculation section that calculates the spectral spectrum at a plurality of measurement points of the molded article from the spectral images for a plurality of the spectral wavelengths; a characteristic value calculation section that calculates a spectral characteristic value at a predetermined spectral wavelength in the spectral spectrum at a plurality of the measurement points; and a mechanical property estimation section that estimates the mechanical property of the molded article based on the spectral characteristic value.

A feeder according to an embodiment includes: a weight-type feeder including a hopper to which a raw material is supplied, and a discharging port from which the raw material is discharged; and a volume-type feeder including a hopper to which the raw material discharged from the discharging port is supplied, and a discharging port from which the raw material is discharged. The volume-type feeder repeats the discharging of the raw material from the discharging port and the stopping of the discharging, and the weight-type feeder continuously discharges the raw material from the discharging port to the hopper during which the discharging of the raw material from the discharging port and the stopping of the discharging are performed.

A plasticizing device includes a first flat screw including a first groove forming surface in which a groove is formed and configured to rotate; a second flat screw including a second groove forming surface in which a groove is formed and configured to rotate; a barrel including a first facing surface facing the first groove forming surface and a second facing surface facing the second groove forming surface and formed with a communication hole through which a plasticized material is fed outside; and a heating section configured to heat the material supplied to the grooves of the first flat screw and of the second flat screw.