Color change procedure for Hot runner mold
Color change procedure for Hot runner mold
Any mold manufacturer who needs to change color frequently will consider using color change technology. If the high-yield hot runner system does not have the fast color change function, it will increase the cost by thousands of dollars every year. According to the number of such molds, the cost can increase by thousands of dollars or even more every year.
By reducing the injection times of color change to a minimum, eliminating the "dead angle" area of material residue, rationalizing the flow path size and other methods, the pressure drop is minimized and the material turnover rate is the highest, so as to achieve efficient and fast filling.Color change procedure of non needle valve hot runner system:
The system has been started and is processing some color materials;
Move the barrel backward, clean and add new color materials;
Raise the temperature of the hot runner system in all areas to 30 ℃ ~ 40F / 16 ℃ ~ 22 ℃ of the working temperature
10 to 15 injections;
Move the injection unit backward and close all heating elements on the hot runner system;
Allow the hot runner system to cool. In this way, the old material can be rubbed off from the flow channel wall, so that the new and old colors can be mixed;
Start the hot runner system and heat it to the process temperature
Move back to barrel
Increase injection speed, continue casting until the color becomes acceptable;
Continue to adjust the process, and reset the temperature and injection speed of the hot runner system to normal.
matters needing attention
Some plastics can release harmful gases. Please follow the advice of plastic suppliers, refer to their material safety data sheet, and make sure the working area is well ventilated.
