Monday, July 09, 2007
Printing a polymer pump
If this works it is going to be very crude. That's all right, though. This is all about developing knowhow with HDPE.
So far I've printed the raft and am just about through printing the base level of the pump.(Read the full story)
By the way, with the rafts you are using, I'm assuming that the part bonds itself pretty well to the raft. Is your plan to then grind off the raft after a part is complete, or does it not stick all that well, and you can just pry it off? Also, if you have to use the raft because the HDPE won't stick to the table, how do you get the raft to stick? :)
The raft spreads the stress of the print over a larger surface on the foamboard. HDPE sticks rather well to foamboard, but not well enough that you don't need to print a raft.
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