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hinged glande mould test - very early prototype (Read 2488 times)
Curious Aardvark
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hinged glande mould test - very early prototype
Feb 18th, 2019 at 3:05pm
 
Okay, first off this is small. The glandes are 25mmx11mm
Couple of reasons.
1) only takes half an hour to print both halves Smiley
2) no point wasting plastic on something that might not work Smiley

So it does work, and assuming you can make the moulds non-stick to clay  - haven't tried that yet - is nearly good to go.

Just need to figure out how to make the hinges parametric.
At the moment, when I put in larger glande specifications, the hinge components come apart. No idea why, I will figure it out !
The mould and cutter are fine. Just the damn hinges Sad

So all that said - the metal rod is part of a bbq skewer. That would need fixing in place as well - not a problem.

Also play-doh isn't ideal as it is very soft. So getting out and removing the thin skirt tends to deform the glande a little.
I think what i'd do with clay is let it dry a little before using the cutter to remove the skirt,
Or just rub ut off when it had dried some.

All that said, it should be a lot quicker than the sliding moulds.

so here's the first pics:
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Curious Aardvark
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Re: hinged glande mould test - very early prototype
Reply #1 - Feb 18th, 2019 at 4:53pm
 
so now I'm thinking, would the original press moulds work is i added clay release channels ?

Would be so much easier without the hinge Smiley
So that's next  Smiley
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Re: hinged glande mould test - very early prototype
Reply #2 - Feb 19th, 2019 at 3:21am
 
That looks really promising. Interesting to see where this leads.
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Re: hinged glande mould test - very early prototype
Reply #3 - Feb 19th, 2019 at 5:09am
 
Alex. Ich hatte die Idee eine silikon Spritze zu verwenden. 😁 Fülle eine Kartusche mit Ton / Lehm und drücke es wie silikon heraus. An der Spitze ist deine pressform befestigt. 😁
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Re: hinged glande mould test - very early prototype
Reply #4 - Feb 19th, 2019 at 11:09am
 
Nice work.
could talc powder be used  instead of the cutter thing?

I like jaegoors idea.
instead of hinges you could add protruding guides and use them as press molds with silicon syringe or a vise.
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Curious Aardvark
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Re: hinged glande mould test - very early prototype
Reply #5 - Feb 19th, 2019 at 11:36am
 
the big syringe would produce a cylinder - but not an exact size and shape.

The press mould doesn't really work. You definitely need that directional squeeze you get with the hinge.

I'll just have to think about how to get it parametric.
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Re: hinged glande mould test - very early prototype
Reply #6 - Feb 19th, 2019 at 2:19pm
 
I am not sure if you have thought about this but it may help. Take a look at the fifty second bullets article on the old website. If you use the technique of jamming the clay into the U shaped piece you can then make a cutter that will give you just the right amount of clay to put in the mould. If you make a press mould it should be able to close completly so the glande can shape properly. And maybe for the sticky issue why not some flour or oil in the mould?  Smiley
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Re: hinged glande mould test - very early prototype
Reply #7 - Feb 20th, 2019 at 6:46am
 
yeah but you still have to have a measure or scales.
the hinged moulds mean you just need the mould.

Plus the moulds tend to be all different sizes.
So working out the actual volume to produce for a seperate mould to get the right amount of clay for the actual mould is maths way beyond me.

i want to be able to throw a lump into a mould, without measuring, and quickly squeeze a glande.
That way all you need is the mould.
Plus changing the cutters to a small plastic spatula type thing that I can probably house in the mould itself.
easy to whittle a new one when you lose the original.

yeah, a quick wipe with some oil is probably going to be the best bet. Flours is just going to mix with the clay and increase the buildup of clay on the mould surface.
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Re: hinged glande mould test - very early prototype
Reply #8 - Feb 20th, 2019 at 2:15pm
 
Just remember,  I called dibs on being 1st in line as a tester.  Cool
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Re: hinged glande mould test - very early prototype
Reply #9 - Feb 26th, 2019 at 10:20pm
 
Great idea, interesting how it ends up.
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Curious Aardvark
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Re: hinged glande mould test - very early prototype
Reply #10 - Mar 20th, 2019 at 12:02pm
 
Right, finally got a couple hours to redo the hinges.
I think I was just being too complicated.

They now stay put and resize when you resize the mould Smiley

Just about to print a 60x30 mould.
See you in a couple of hours Smiley

The biggest problem is most likely going to be getting a good quick squeeze on. Currently thinking I'll just maybe step on it.
Should be easily strong enough for that.

Handles for leverage was my first idea, we'll see how this mould turns out and how easy it is with the air dry clay, I doubt anyone will use anything stiffer - so it's a good test.

Oh yeah, these are - probably - only ever going to come in the one style.
I'll stick to the text stamps for words - particularly as I've only just got them to automatically size depending on the length of the word Smiley

The little skirt cutting 'sticks' will live in a hole in the mould, to keep everything handy and together for throwing in your pocket.

Right might as well take the dogs out while I'm waiting.
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Re: hinged glande mould test - very early prototype
Reply #11 - Mar 21st, 2019 at 9:14am
 
so that works well with play doh - used a quick wipe of 3-in1 oil.
Thinking cooking oil will be fine for clay.
hell water might also work. Once I've got the final design down I'll start experimenting with what works best.
And yes, you can stand on them for extra squeeze Smiley

Still got a fair bit to do. handles for leverage are definitely going to be a good idea. Might use metal inserts for extra strength - got some 4.5mm tent pegs that would do the job.
needs text on the mould as well.
Figure the curious aardvark designs on one half and the size on the other.

But on the whole, looking pretty good.
There will definitely be some prototypes going begging for p&p only, so yes Ryan, one will have your name on it Smiley

These aren't going to be cheap as there's a fair bit of post processing involved, but should be very long lasting, fast and accurate.
using 0.25mm gap for the hinges and they work really well with no side movement. 
Might beef the hinges up - currently 7mm outer diameter, probably eventually go with 8 or 9.
Can't imagine that it's possibly to bend a 2.8mm steel rod via a - 0.25mm gap, so can't see any reason to change the hinge pins.

So here's where we are at the moment. Got a few hours this afternoon to work on the handles and text.

Oh yeah the play doh was left overnight - hence the cracks, it dries out really fast and shrinks an awful lot. Clay won't do that.
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Curious Aardvark
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Re: hinged glande mould test - very early prototype
Reply #12 - Mar 21st, 2019 at 11:38am
 
first views of the handled mould.

I think they look like little tanks Smiley

The hole in the 'gun barrel' is for the 4mm steel reinforcing rod.
20x40 test mould currently being made.
Oh yeah the flat bit is for sticking to the print bed - they print that way on up.
Hopefully !
I can always make it larger, if i get issues with the overhangs.

Right, on to the text Smiley
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Curious Aardvark
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Re: hinged glande mould test - very early prototype
Reply #13 - Mar 21st, 2019 at 11:44am
 
Ah right - just worked out jaegoors syringe idea.
You've still got the get the buggers out of the mould.
I think it probably makes things more complicated rather than less.
there'd be a fair bit of back pressure so you'd need a way to securely attach the mould to the nozzle.
I'll bear it in mind Smiley
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Re: hinged glande mould test - very early prototype
Reply #14 - Mar 21st, 2019 at 7:30pm
 
Alex. Ich hätte tatsächlich eine Idee wie es funktionieren kann. Ich werde dir eine Skizze machen. 😁
Zum befestigen an einer Spritze reicht ein gewinde. Viele Kartuschen haben bereits ein gewinde für die Düse.
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