Colored plastics molding device having an automatic calibration function

A colored plastics molding device comprising:

• a raw plastics material supply means which stores a raw plastics material for molding having a thermoplasticity and discharges the raw plastics material stored;
• a cylindrical transfer member which transfers the raw plastics material from this raw plastics material supply means;
• a colorant supply means which supplies a liquid colorant to the inside of said transfer member, the discharge end of a freely replaceable nozzle being disposed there;
• a conveying means which mixes the raw plastics material fed through said transfer member with the colorant, while conveying the mixture for molding;
• a detection means which detects the conveying state of said conveying means;
• and
• a control means which performs operation control of said colorant supply means on the basis of the result of detection by this detection means;
• wherein said colorant supply means has an automatic calibration function which allows automatic setting of the quantity of liquid colorant to be supplied;
• and
• wherein said colorant supply means has functions of setting of colorant set quantity and setting of number of calibration discharge times;
• the value of total delivery of colorant is determined;
• and from the value of total delivery of colorant and the number of calibration discharge times, the value of delivery of colorant for one calibration discharge time is determined.