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niya2000007
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Popular Science - Weaponology - New Member Hobbies - Automotive Performance - New Member

Join Date: Oct 2008
Location: Shenzhen China
Posts: 39

Porosity Problem with Wheel Assembly?

09/01/2010 11:19 PM

It is an over molding part , Material : bearing and Nylon 6.6 ,

If you have a problem with porosity in wheel assemblies , how to solve them ?

Change the material Nylon 6.6 into Nylon 6.6 + GF 30 ?

Or use some extreme pressure grease ?

Or increase the gates on mold ?

Thank you in advance .

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Yahlasit
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Join Date: Dec 2008
Location: Cd. Juarez, Chihuahua, Mexico.
Posts: 1023
Good Answers: 69
#1

Re: Porosity Problem with Wheel Assembly?

09/02/2010 8:20 AM

Hi Niya:

My experience is very limited on injection molding, so all I can tell you (because I used to see it a lot), is that you need to make sure your nylon pellets are being thoroughly dried before molding. Otherwise you'll have a severe porosity problem.

Check the air filters, air flow diverters, turbines and desicant level/age on your dryer.

Yahlasit

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lyn
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Join Date: Oct 2008
Posts: 42355
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#2
In reply to #1

Re: Porosity Problem with Wheel Assembly?

09/03/2010 5:31 PM

I agree with you. Nylon is especially moisture sensitive/absorbent.
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