Job Description:

• 1) Controls equipment to weigh and mix gypsum with specified proportions of fiber, retarder, perlite, and other additives to make plaster: Starts mixing machine and sets weigh hopper.

• 2) Engages screw feeder that feeds specified amount of gypsum from storage bin into weigh hopper.

• 3) Weighs additives according to specifications and dumps them into hopper.

• 4) Opens gate of hopper to drop ingredients into mixer.

• 5) Opens mixer gate after specified time to discharge mixed plaster product into packer hopper.

• 6) May fill bags with mixed plaster.