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Design Solution For Polycarb Clamshell

Thanks, Daniel, that's a possibility. I'll look into whether or not the geometry will allow this. Thanks, again, for the suggestions.

Replied May 22

Design Solution For Polycarb Clamshell

Thanks for the suggestion, Daniel. The parts are actually more of an oval than circular - my fault for not making that clear in the above description. Good idea, though.

Replied May 21

Design Solution For Polycarb Clamshell
4 Replies

Imagine you have two halves of a clam shell (not unlike a woman's compact, but the two halves are not connected by a hinge) made of polycarbonate. The goal is to be able to connect these together in…

Started this discussion. Last reply by Aaron Moncur May 22.

Annular Joint Design Question

I've read that the mating force calculated for an annular joint is typically much higher than what is actually required to assemble the parts (because the calculated value assumes a true axial assemb…

Tagged: Calculation, Joint, Annular

Started May 6

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Aaron Moncur replied to Aaron Moncur's discussion 'Design Solution For Polycarb Clamshell'

Thanks, Daniel, that's a possibility. I'll look into whether or not the geometry will allow this. Thanks, again, for the suggestions.

May 21

Daniel Christadoss replied to Aaron Moncur's discussion 'Design Solution For Polycarb Clamshell'

Aaron, Thanks for your reply. I assume the clam shells will be injection molded. Would it be possible to have an elliptical dome on the top half of the clam shell. The annual joint may work to close the clam shell. You could release the bond of the…

May 21

Aaron Moncur replied to Aaron Moncur's discussion 'Design Solution For Polycarb Clamshell'

Thanks for the suggestion, Daniel. The parts are actually more of an oval than circular - my fault for not making that clear in the above description. Good idea, though.

May 21

Daniel Christadoss replied to Aaron Moncur's discussion 'Design Solution For Polycarb Clamshell'

Aaron, How about an intermittent annular joint. You could twist the clam shells apart.

May 21

Aaron Moncur added a discussion

Design Solution For Polycarb Clamshell

May 21

Aaron Moncur added a discussion

Annula Joint Design Question

May 5

John Tak replied to Aaron Moncur's discussion 'Threaded Hole Min Wall Thickness'

I just come across this thread and I am not sure that you got your answer. Never use Nylon if you have a choice. This material has to be processed under extreme tight controlled condition. If it absorb any moisture during the processing, the final…

February 25

Martin Peltz replied to Aaron Moncur's discussion 'Threaded Hole Min Wall Thickness'

I would not use Nylon if there are temperature cycles and/or UV exposure in your design. Nylon has tendancies of drying out and cracking when exposed to UV (unless coated with a UV protector), nylon will also and dry out when thermally cycled. There…

February 25

doug cooley replied to Aaron Moncur's discussion 'Threaded Hole Min Wall Thickness'

That thread is so small and so fine that your load will cause failure within very few loading cycles. You should really consider a metal molded-in threaded insert like SPIROL.

February 24

RICH PROSPERO replied to Aaron Moncur's discussion 'Threaded Hole Min Wall Thickness'

I would suggest applying an INSERT to the substrate.< http://www.mcmaster.com/#threaded-inserts/=5qvzmq> are some examples. PEM inserts may have other inserts more applicable, too. good luck, Rocky

February 9

Josh Habing replied to Aaron Moncur's discussion 'Finishing Options, What's the best balance between cost and function'

Hi Aaron, Have you considered using an E-Coat paint system (I'm referring to the kind used on automobiles). I've seen surface finishes and durability as good as aluminum anodizing on these parts, and looking just as good, if not better. Cost is les…

January 16

Allen J. Schott and Aaron Moncur are now friends

January 4

Aaron Moncur updated their profile

January 4

Aaron Moncur replied to Aaron Moncur's discussion 'Threaded Hole Min Wall Thickness'

Thanks much, Al. Sounds like you have an excellent grasp on materials. Are there any books or other resources you can recommend I acquire to learn more about what materials are appropriate for certain applications? I have a book now called Material…

January 4

Allen J. Schott replied to Aaron Moncur's discussion 'Finishing Options, What's the best balance between cost and function'

With the gloss shown in the pictures, it may be just a paint. anodizing can coat the inside, but not far into the tubes. Powder coating will coat the inside and a little bit of the inside. If the parts are aluminum, I'd go with the anodizing - proba…

January 4

Allen J. Schott replied to Aaron Moncur's discussion 'Threaded Hole Min Wall Thickness'

Stay with Glass Filled Nylon, the only other material I would try is Noryl, but the nylon is fairly common.

January 4