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Unread 03-20-2005, 09:36 AM   #4
Dave
Cooling Savant
 
Join Date: Oct 2004
Location: Canada
Posts: 260
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Most engineers including myself understand that Bill. It was clear to me when Dan stated "it is the shape of the tool".

I am hoping someone can explain why this type of plastic forms micro cracks under these conditions, so all can understand.

Good pictures

Why don't you guys just mold these parts?
I understand if you mold first then cut, the cracks will not be as much an issue due to stress patterning. Would only be $1-2K for a simple mold like this, we make them all the time.

Even better we use this machine for small runs and REAL cheap tooling.
It has a high price new, in fact you could buy a real good full size used injection machine for same costs. But if you can find a used one it may just be your answer.

http://www.morganindustriesinc.com/index.htm

Last edited by Dave; 03-20-2005 at 09:45 AM.
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