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Manufacturing Jedi
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Join Date: Jun 2007
Location: Mexico
Posts: 95
Good Answers: 1

Plastics engineering III

11/23/2007 6:06 PM

This was another question, I think they are freaking hard:

A gas tank float (Texaco gasoline) of 1.000 +/- 0.050 inch in diameter, must operate for five years with this tolerance at an average temperature of 73 F. The float must operate between -40 F to 120 F . Assume the post mold shrinkage is negligible and the cavity will be sized to produce average parts at 73 F.

a) Do the tolerance analysis and determine if it is feasible in acetal plastic Delrin 500 NC010?

b) Is coarse molding tolearnce satisfactory in this case?

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This discussion was "closed" on 11/30/2007 3:49 PM. No new comments are allowed.
Steve S.
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Join Date: Aug 2007
Posts: 1790
Good Answers: 87
#1

Re: Plastics engineering III

11/23/2007 9:39 PM

So are you trying to get help on a take home exam?? Why are you posting all your exam questions here?
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Manufacturing Jedi
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Join Date: Jun 2007
Location: Mexico
Posts: 95
Good Answers: 1
#2
In reply to #1

Re: Plastics engineering III

11/24/2007 1:57 AM

that is exactly what I am doing. I will try to finish it myself but sincerelly I do not understand too much what is happening. I just substitute numbers on ecuations. I was kinda hoping someone knew what is going on.

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Anonymous Poster
#3

Re: Plastics engineering III

11/24/2007 8:44 AM

and you dont see that as a problem????
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GreenShoes
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Join Date: Sep 2007
Location: Watertown, SD USA
Posts: 68
Good Answers: 1
#4

Re: Plastics engineering III

11/25/2007 9:29 AM

Is it because you don't understand your text books or your instructor? There are many books out there that can help you on the plastics design side if your current text isn't cutting it.
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Manufacturing Jedi
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Join Date: Jun 2007
Location: Mexico
Posts: 95
Good Answers: 1
#5
In reply to #4

Re: Plastics engineering III

11/26/2007 10:22 AM

You are right, I need a textbook, I don't even have a textbook. My instructor has a very strange way of giving classes.

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This discussion was "closed" on 11/30/2007 3:49 PM. No new comments are allowed.
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Users who posted comments:

Anonymous Poster (1); GreenShoes (1); Manufacturing Jedi (2); Steve S. (1)

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