Observe continuous operation of automatic machines to ensure that products meet • Measure and visually inspect products for surface and dimension defects in order to ensure • Set up, operate, or tend plastic molding or casting machines to mold or cast plastic parts or • Turn valves and dials of machines to regulate pressure, temperature, and speed and feed • Remove finished or cured products from dies or molds, using hand tools, air hoses and • Install dies onto machines or presses, then coat dies with parting agents, according to work • Mix and measure compounds, or weigh premixed compounds; then dump them into machine • Observe meters and gauges to verify and record temperatures, pressures, and press-cycle • Spray, smoke, or coat molds with compounds to lubricate or insulate molds, using acetylene • Read specifications, blueprints, and work orders to determine setups, temperatures, and time settings required to mold, form, or cast plastic materials, as well as to plan production • Adjust equipment and workpiece holding fixtures, such as mold frames, tubs, and cutting • Smooth and clean inner surfaces of molds, using brushes, scrapers, air hoses, or grinding • Obtain and move specified patterns to work stations, manually or using hoists, and secure • Repair or replace damaged molds, pipes, belts, chains, or other equipment, using hand • Pull level and toggle latches to fill molds, to regulate tension on sheeting, and to release • Clamp metal and plywood strips around dies or patterns to form molds