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Author Question: Discuss three operational steps that can be taken to reduce the thickness of an extruded part. ... (Read 160 times)

shenderson6

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on: Aug 19, 2018
Discuss three operational steps that can be taken to reduce the thickness of an extruded part.
 
  What will be an ideal response?

Question 2

Explain the effect of molecular weight distribution on extrusion.
 
  What will be an ideal response?


Hdosisshsbshs

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Reply #1 on: Aug 19, 2018
Answer to Question 1

The drawdown can be increased by speeding up the puller with respect to the speed of the extruder.

Answer to Question 2

Short, low molecular weight polymers will melt sooner than long polymers and will therefore act as lubricants for the longer, higher molecular weight polymers in the same resin. The longer polymers, however, give melt strength to the resin. Therefore, extrusion resins would generally have a wide molecular weight distribution so that the resin would flow easily but still have good melt strength.


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shenderson6

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Reply #2 on: Aug 19, 2018
Both answers were spot on, thank you once again


Hdosisshsbshs

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Reply #3 on: Aug 19, 2018
Great! Please up vote :D


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