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Author Question: Identify three methods for controlling an exotherm in casting. What will be an ideal ... (Read 44 times)

wrbasek0

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on: Aug 19, 2018
Identify three methods for controlling an exotherm in casting.
 
  What will be an ideal response?

Question 2

Identify the four major types of polymeric liquids used for casting, and give one specific example of each type.
 
  What will be an ideal response?

Question 3

What is a parting agent, and why is it important in casting?
 
  What will be an ideal response?


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cloudre37

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

Three methods for controlling an exotherm are making all sections of a part thin, casting thick parts in multiple pours, and minimizing the heat created by lengthening the curing time.

Answer to Question 2

Liquid casting resin  acrylic syrup, polyester resin, polyurethane, caprolactam Hot-melt resin  melted nylon, melted polyethylene
Plastisols and organisols  PVC plastisol
Solvent casting resin  acrylic dissolved in an acetone, nylon in dimethylformamide

Answer to Question 3

A parting agent is a mold release. These are important in casting because the complexity of many cast parts makes removal from the mold difficult. Therefore, some materials need to be coated on the mold so that release is facilitated.


wrbasek0

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Reply 2 on: Aug 19, 2018
Thanks for the timely response, appreciate it

elyse44

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Reply 3 on: Yesterday
Excellent

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