Quote:
Originally posted by Cathar
I use straight copper pipe fittings on my radiators all the time, often without clamping while pushing 20PSI through the system and they don't leak. Not something that I recommend, but it shows how a straight pipe fitting can be just fine. Maybe taper the top of the fittings slightly going from 12mm to 13mm over say a 5mm length, so the hoses are easy to get on, but tighten up as you push them further down the fittings. This is basically what a barb rib does anyway and that can still be molded simply. Use 1.5mm thick walls for the fittings which gives a 10mm ID and enough strength, and a rounded base to the fittings where they meet the top of the plate for added rigidity at the stress point.
[Edit: Cross post with Since87] - Yes I'm aware of "drafting" for molds. For polycarb a 2 degree draft is sufficient.
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That 2 degree angle would be perfect!
Is there still a cheaper alternative to molding? I mean, are you sure you're not dismissing the cost, to reduce the amount of time that it would require from you to assemble the blocks?