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hinged glande mould test - very early prototype (Read 2829 times)
Curious Aardvark
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Re: hinged glande mould test - very early prototype
Reply #30 - Mar 24th, 2019 at 5:20pm
 
So, picture the scene:
It's dark out, I'm using the top of a wheelie bin as my work top.
Every now and then I have to wander around waving my arms above my head, like an orangutan to get the sensor to put the light back on.
Can't really see what I'm doing.
But even so the little cutting stick made removing the skirt and channel clay pretty simple.
Oh yeah and if you forget to use the talc, things get messy, see the 50x25 mould lol

when they're dry I'm going to spray paint them silver - the talc will probably wipe off when the clay's a bit harder and dryer.

But, moulds: complete success !

With the talc, you just shake a little into each half, close mould fast and shake.
clay comes out easy.

And the jaegoor text stamp was the only one close to hand Smiley
With a rocking motion, it's actually pretty easy to get it on the sphere too.
For cleanup just run the moulds under a tap. don't recommend full immersion, as they're not 100% water tight and will absorb water and then leak it out when removed from sink.
Rinsing should be fine - I'll try that in a bit.

It's kind of messy - do it outside Smiley
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Do All things with Honour and Generosity: Regret Nothing, Envy None, Apologise Seldom and Bow your head to No One  - works for me Smiley
 
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Jaegoor
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Re: hinged glande mould test - very early prototype
Reply #31 - Mar 24th, 2019 at 5:41pm
 
Ich bin begeistert Alex. Ich nehme eine Form. 😁
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Curious Aardvark
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Re: hinged glande mould test - very early prototype
Reply #32 - Mar 24th, 2019 at 5:53pm
 
now, how do i work out pricing ?
I am really crap at pricing things.

I'll do a walk through on construction, so you get some idea what's involved. And at some point I'll do a timelapse of the printing part.

Before anyone asks, I'm probably not making a two chamber mould.
Plastic and steel rods are plenty strong enough for one glande at a time, two - probably not. There are stronger (more expensive) plastics I could use - we'll see. 
I was thinking about a universal press with removeable sections for multiple size and shapes. But at the end of the day, this is what we have for the forseable future Smiley

Oh yeah, pla - what these are made of is theoretically biodegradable. It's also made from cornstarch NOT petrochemicals.
Between the pla and the cklay - we have a totally enviromentally friendly sling missile system !

It's worth mentioning Smiley
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Willem208
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Re: hinged glande mould test - very early prototype
Reply #33 - Mar 25th, 2019 at 10:51am
 
These are looking really good CA!  Cheesy
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Curious Aardvark
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Re: hinged glande mould test - very early prototype
Reply #34 - Mar 25th, 2019 at 4:03pm
 
okay, so you know when you think you've finished a job and someone points out something blindingly obvious that you missed ?

Added extra handle reinforcement - pretty sure the metal rod is no longer needed - but I'm a belt and braces kind of guy so I'm going to keep it !

This bad boy is for jaegoor. It's the same size as the perfect rock that he found (marginally bigger, clay shrinks).

I think I'll call this mk-hulk, past the point where numbers mean anything and if you can snap the handles on this, I'll be astonished Smiley
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Do All things with Honour and Generosity: Regret Nothing, Envy None, Apologise Seldom and Bow your head to No One  - works for me Smiley
 
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Curious Aardvark
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Re: hinged glande mould test - very early prototype
Reply #35 - Mar 29th, 2019 at 12:47pm
 
in case anyone is wondering - I'm currently just working on final printing settings and materials.

Trying out stuff called pet-g: poly(ethylene terephthalate) glycol

It's a right bitch to get to work well, but has much higher layer bnding and impact strength than pla.
The downside is that it takes about twice as long to print and it's stringy as hell.
The price of the material, is similiar to pla. So far haven't managed to get a smooth void.

To put it in perspective, a large mould from pla will probably take around 7 hours.
The same thing with pet-g would be over 14.

I've boosted the density and strength of the pla moulds.
I honestly don't think they'll break.

If I can get pet-g to behave I might offer it as an extra cost option.

Once I've eventually got my cheapo ctc i3 pro-b fully modded and working properly. I can use that without tying up my delta, which currently is used for about 90% of prints as it's just fast and super reliable Smiley

Anyway, I'm extremely close to putting these up for sale.
That's the news Smiley
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Do All things with Honour and Generosity: Regret Nothing, Envy None, Apologise Seldom and Bow your head to No One  - works for me Smiley
 
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TheJackinati
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Re: hinged glande mould test - very early prototype
Reply #36 - Mar 29th, 2019 at 12:59pm
 
That's awesome.

What do those projectile weight when dry?
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Jaegoor
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Re: hinged glande mould test - very early prototype
Reply #37 - Mar 29th, 2019 at 2:56pm
 
Es ist einfach genial. 😁
FANTASTICO
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Curious Aardvark
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Re: hinged glande mould test - very early prototype
Reply #38 - Mar 29th, 2019 at 5:34pm
 
@
TheJackinati

Depends entirely on the size of the glande and the type of clay.

I'll go get my scales - brb -
So with air dried modelling clay, that's been on my workshop radiator for a few days.

50x30 = 41gms
60x30 = 49gms
45mm sphere= 84gms

people get too caught up in weight. Even the small one feels like a great size and weight for slinging.
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Re: hinged glande mould test - very early prototype
Reply #39 - Mar 29th, 2019 at 7:46pm
 
Ohhhh I cant wait. Even if I don't understand all that 3d printer speak. I am also prepared to make another video
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Re: hinged glande mould test - very early prototype
Reply #40 - Mar 30th, 2019 at 12:46am
 
Curious Aardvark wrote on Mar 29th, 2019 at 5:34pm:
people get too caught up in weight. Even the small one feels like a great size and weight for slinging.


Well not me. Projectiles within 40 to 80 grams are my favourite to sling (70-80 Grams are probably my optimum weight). I can get those going good distances with a Byzantine throw.
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Re: hinged glande mould test - very early prototype
Reply #41 - Mar 30th, 2019 at 5:45am
 
genial Alex
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Re: hinged glande mould test - very early prototype
Reply #42 - Mar 30th, 2019 at 11:33am
 
I think I'll need to get one of these. Still need to have a look around at what types of clay I can easily get hold of but these moulds look fantastic.
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Re: hinged glande mould test - very early prototype
Reply #43 - Mar 30th, 2019 at 12:58pm
 
Alex: how do you set prices? My recommendation:
A good rule of thumb is 3-4x your costs, not including shipping. If you estimate the price of the filament, the markup covers your time, electricity, wear and tear on your printer, and there is a little margin if the print fails and you lose some filament before a reprint.
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Re: hinged glande mould test - very early prototype
Reply #44 - Mar 30th, 2019 at 6:01pm
 
Perfekt Slingstone 😁
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