When you clean screw/barrel of injection molding machines, set the molding conditions as shown below after you finish molding of precedent plastics, and repeat metering and discharging.
After purging, set the molding conditions for the subsequent plastics, replace CELPURGE with the subsequent plastics after the barrel temperature stabilizes.
|Metering position||Barrel temp||Screw rotation||Back pressure||Injection pressure||Injection speed|
|10 - 30mm||keep unchanged||50 - 70％||2 - 10％||70 - 99％||70 - 99％|
It is effective to apply back pressure slightly. Too high back pressure leads much CELPURGE to flow out from the nozzle during metering and makes the purging ineffective.