Low pressure / temp plastic molding

[JohnSL]

If you are doing anythign bigger than a few grams of plastic then you will need to have a serious machine. those benchtop machines just will end up being fustrating for you.

What are the problems with benchtop machines? I have a lot of experience with benchtop machines, although only using polystyrene. I've done some over molding and it worked well. Also, in case anyone is interested in designing injection molds, I recently started a video series on just that:

  -- John

[mrpackethead]

If you are doing anythign bigger than a few grams of plastic then you will need to have a serious machine. those benchtop machines just will end up being fustrating for you.

What are the problems with benchtop machines?
[/quote]

The polyamide cools quick enough that unless your fill time is short you'll get  voids forming and or weld fronts..  On the part i showed you above we have a gate that is massive in comparison to more typical Injection moulded parts... Its 3mm deep and 70m long

[Sonny_a67]

Hi guys, very interesting discussion! I thought I post my here instead of creating a new thread since it's very related.
I have designed a board which should eventually be molded between two underwater sea cables and could potentially go down to the depths of 5000m!
I was wondering if anyone has a suggestion as for what type of molding method, material, etc. I should consider and perhaps if someone knows a prototyping house which could do this type of stuff!
Thank you in advance!

[mrpackethead]

at 5000meters the pressure will be well down.

I know that some of the macromelt products were used on teh deep water horizon recovery, the water was 1600m deep there.      I'd suggest that this however is a very specialist topic and that the number of folks doing deep-sea cable joins are few..   But Cable joining is being done everyday, so its just a matter of finding who does it.

[Kean]

Check out http://www.ronallum.com/ who worked on the Deepsea Challenger and other projects

[mrpackethead]

deep for me is a couple of meters!