The body is horrific and stupid, but the plunger is at least the correct diameter and length to push through the needle nicely with a little bit of friction… just enough to not allow the plunger to just slide or fall out, but not enough to really impede pushing the magnet out the needle.
What I need is for someone who knows what they are doing to make a workable needle body and better looking plunger. The idea is that we could print these in PLA, glue the needle to the body with medical adhesive, and sterilize them with the magnet inside for anyone who wanted that.
The plunger in my STL is 4.25mm diameter. My (shitty) calipers say the needle ID is 4.3 and the needle OD is 4.9mm. The printed injection body should allow for 20mm of the needle (the part behind the laser etched mark) to seat and be glued into the body.
needle adapter is currently onto print, ill also make an adapter for the plunger, and ill print a faux magnet, should have a working concept model in about 40 mins.
may be a bit longer i found my long walletmore needle and a shorter commercially available one, so ill be making 2 concept models. im currently sercoming to printers size tolarances, ( adding and removing 0.1mms for that perfect fit lol. i have no chance of printing that thread mechanism on this printer, at 1.5mm thick its not gona hold shit.but like you said theres surgical glue)
theres about 20mm between the 2 needle sizes, so ill also compensate the plunger 20mm,
so here are the basic concept parts i have designed and am currently printing, from left to right we have the plunger attachment, the magnet, and a short needle adapter
Here you go heres the basic concept. Ive found out the part requested it a ''luer lock." I looked for a 5mm lure lock so i didnt have to do anything but couldnt find one. Im sure they exist tho. For spinal taps n shit. Anyway here is my submision to ther challange
I did find some needle safe finger cots which worked better. I don’t think anything short of super fine chainmail will actually stop a needle, but these cots at least put up some resistance before letting the point through.
Just for informational purposes, that mechanism is called a Luer Lock system. The thing you’re trying to design and print is called a “needle hub”.
But… it looks like you already got it sorted out.
Another thing you can do is just use small pegs instead of the entire thread, because the correctly positioned pegs will ride the thread in the injector body receiver just fine… though locking the hub in place will require some careful nusance instead of just wrenching it on.
im only teasing ur absolutely right, print it out lemme know what u think… its a good fit if u ask me. be nice on a resin printer. you wont need the short 2 pieces
