« previous next »

Author Question: Discuss three operational steps that can be taken to reduce the thickness of an extruded part. ... (Read 163 times)

shenderson6

  • Hero Member
  • *****
  • Posts: 573
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

  • Sr. Member
  • ****
  • Posts: 315
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.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

shenderson6

  • Hero Member
  • *****
  • Posts: 573
Reply #2 on: Aug 19, 2018
Both answers were spot on, thank you once again


Hdosisshsbshs

  • Sr. Member
  • ****
  • Posts: 315
Reply #3 on: Aug 19, 2018
Great! Please up vote :D


« previous next »
 

Did you know?

Historic treatments for rheumatoid arthritis have included gold salts, acupuncture, a diet consisting of apples or rhubarb, nutmeg, nettles, bee venom, bracelets made of copper, prayer, rest, tooth extractions, fasting, honey, vitamins, insulin, snow collected on Christmas, magnets, and electric convulsion therapy.

Did you know?

Thyroid conditions may make getting pregnant impossible.

Did you know?

Cocaine was isolated in 1860 and first used as a local anesthetic in 1884. Its first clinical use was by Sigmund Freud to wean a patient from morphine addiction. The fictional character Sherlock Holmes was supposed to be addicted to cocaine by injection.

Did you know?

The human body's pharmacokinetics are quite varied. Our hair holds onto drugs longer than our urine, blood, or saliva. For example, alcohol can be detected in the hair for up to 90 days after it was consumed. The same is true for marijuana, cocaine, ecstasy, heroin, methamphetamine, and nicotine.

Did you know?

The most destructive flu epidemic of all times in recorded history occurred in 1918, with approximately 20 million deaths worldwide.

Flower part number is a characteristic difference between monocots and eudicots (a) Flowers and buds Flower part number is a characteristic difference between monocots and eudicots (a) Flowers and buds
The Trundholm Sun chariot pulled by a horse is a sculpture believed to be illustrating an important The Trundholm Sun chariot pulled by a horse is a sculpture believed to be illustrating an important
A Midsagittal View of Part of the Brain A Midsagittal View of Part of the Brain
How to evaluate algebraic terms containing fractional exponents without a calculator (Part 2) How to evaluate algebraic terms containing fractional exponents without a calculator (Part 2)
Steps in the process of translation (Part 2) Steps in the process of translation (Part 2)
Plot of land (Part c) Plot of land (Part c)
Video: How proteins function? How do proteins work?

For a complete list of videos, visit our video library