Home / Expert Answers / Mechanical Engineering / little-plastic-widgets-are-made-by-extruding-a-polymer-through-a-shaped-die-and-slicing-it-off-with-pa112

(Solved): Little plastic widgets are made by extruding a polymer through a shaped die and slicing it off with ...



student submitted image, transcription available below
Little plastic widgets are made by extruding a polymer through a shaped die and slicing it off with a knife every time it reaches a certain length. These widgets then fall through the air and cool off as they do so, hopefully reaching an acceptable temperature when they land in the bin. Each widget has a maximum dimension of and an initial temperature of , where the ambient air temperature is . (Use if needed.) Other useful properties include: - Polymer thermal conductivity - Polymer density - Polymer specific heat - Heat transfer coefficient (a) The centerline temperature of the widget has to be below when it hits the bin. How much time will that take? Is this a practical way to cool these parts? (b) Will the time be longer or shorter if a different polymer is used with one-third the thermal conductivity, but the other parameters approximately the same? Explain why.


We have an Answer from Expert

View Expert Answer

Expert Answer



We have an Answer from Expert

Buy This Answer $5

Place Order

We Provide Services Across The Globe