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Job Description and Jobs

Job Description:

  • 1) Operates preexpander and continuous molding machine that expands and molds polystyrene beads under heat and pressure, forming bead board: Reads work order to determine resin type and density requirements for bead board production.

  • 2) Shoves intake tube in resin and presses tube into coupling of venturi feed system.

  • 3) Presses buttons and turns valves to activate centrifuge, supply steam, and feed resin to expander.

  • 4) Fills volumetric can with beads and weighs beads to determine density, using balance scale.

  • 5) Compares bead density with production requirements.

  • 6) Reads steam pressure and temperature gauges and turns steam valve or rotates auger disk, adjusting heat and resin feed rate to control bead density.

  • 7) Connects hose of molder feed hopper to aging bin and pushes feed hopper into place to feed molding machine.

  • 8) Turns venturi feed valve, sending air through feeder to draw beads from hopper into molder.

  • 9) Starts molding machine.

  • 10) Guides bead board from molder through rollers of trimmer and saw to start board.

  • 11) Monitors gauges and observes operation of molding machine and equipment to ensure operation according to specifications.

  • 12) Inspects bead board for specified fusion and finish.

  • 13) Turns steam and air valves to adjust heat and bead feed rate to prevent machine overload and to correct flaws in bead board.

  • 14) Records lot number of resin, feed rate, and steam pressure, for various densities and board dimensions.

  • 15) Computes production in board feet to determine output.




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End Of Job Description for: "POLYSTYRENE-BEAD MOLDER"
DOT:   556.382-018

Job Number: 7702