Film is being extruded from a 4 cm diameter hot die initially at 250 degrees Celsius. A cooling fan provides circulating

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answerhappygod
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Film is being extruded from a 4 cm diameter hot die initially at 250 degrees Celsius. A cooling fan provides circulating

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Film is being extruded from a 4 cm diameter hot die
initially at 250 degrees Celsius. A cooling fan provides
circulating air at 30 degrees Celsius, producing a convection
heat transfer coefficient of 8. The Film can be approximated as
silicone dioxide it can be considered complete when the extrusion
has cooled to 45 degrees Celsius. How many seconds will a line
worker have before the material is ready to use?
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