Check production speed and quality on many types of automated machines.
Operates roll mill to homogenize and roll plastic compounds into sheeting or slab form: Pushes button to transfer plastic from mixing machine to revolving heated mill rolls. Cuts material with knife and feeds material back through rolls to obtain sheet of specified color, consistency, and thickness. Adjusts slitting knives or starts automatic scraper to strip sheet from rolls. Guides material onto conveyor belt. Observes gauges or feels material and turns steam and water valves to control temperature of rolls. Cleans rolls to prevent contamination of stocks, using wire brush, hand scraper, solvents, and airhose. May adjust roll clearance with hand wrenches.