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General >> General Slinging Discussion >> thinking about press moulds with clay release channels
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Message started by Curious Aardvark on Feb 5th, 2019 at 2:47pm

Title: thinking about press moulds with clay release channels
Post by Curious Aardvark on Feb 5th, 2019 at 2:47pm
The glande roller moulds, work well - but you have to be pretty pedantic with the amount of clay. ie: it needs to be within a gram or so of the same weight every time.

problems I've had with press moulds in the past is the same. you need the exact amount of clay, plus you also have the need to line the mould with clingfilm to stop the clay sticking to it.

But if you could make a press mould non-stick - quick wipe with 3-1n-one oil on kitchen paper, perhaps.
And also intruduce pressure release channels so that you could just dump a lump in, squeeze and get a perfect glande every time - it'd be worth doing.

I have bugger all experience with moulds beyong the glande experiments.
Anyone know how they release the excess clay in commercial factories ?

I'd also like to make the press mould hinged, which would give you directional pressure and only require channels one side.

If you put holes along the top and bottom edge of the mould, then getting the glande out is going to be a right sod and it'll deform in the process.
So it's going to need to come out along the edges.

I figure you could use a gapped guilliotine effect and use that to cut the skirt when you opened the mould, and remove the excess.

So I'm looking for ideas, things I might not have thought of etc.
 

Title: Re: thinking about press moulds with clay release channels
Post by vetryan15 on Feb 5th, 2019 at 3:06pm
I cant help you on the thoughts.  But, the clay rollers work great. If I notice I have too much. The glance becomes deformed,  I just pinch a bit off and re roll it. Which I dont see a problem with.

But if you need testers. I am the 1st in line.

Title: Re: thinking about press moulds with clay release channels
Post by Curious Aardvark on Feb 5th, 2019 at 4:00pm
lol - noted.

I just like the idea of not needing a scales with you.

The guys in guam have a shaped rock that's used to size and shape a clay glande.
That would be easy to do. But a hinged press mould would be a lot faster and not require weighing.

Once I've got this bloody nozzle right I'll start having a play.

sometimes you get a part designed and printed bang on first time.
Sometimes, you dont lol
Lost count of iterations of this cooling nozzle for the ctc i3 pro b printer (cheapest you can buy, but needs a fair bit of modification to work properly - it's getting there, slowly)

Title: Re: thinking about press moulds with clay release channels
Post by TheJackinati on Feb 6th, 2019 at 3:15am
Just make a lead mould already, stop fuffing about with inferior clay! :P

Title: Re: thinking about press moulds with clay release channels
Post by Curious Aardvark on Feb 6th, 2019 at 7:25am
nowhere I could throw a lead glande.

Clay is traditional, easy to work with and the stuff I use doesn't leave dangerous sharp bits behind like stones do.
Clay glandes would have been used long before lead ones.

Given how far i could throw a lead glande, there's nowhere I could guarentee there would be no people or animals at the end of the flight.

Plus I can't 3dprint a lead mould :-)

Title: Re: thinking about press moulds with clay release channels
Post by Jaegoor on Feb 7th, 2019 at 8:33am
Ich schieße sehr selten mit Blei. Es ist sehr gefährlich. Nicht gut für die Umwelt. Ich erlebte einen schlimme. Unfall bei einer Vorführung.
Ton ist eine sehr gute Alternative. 😁
Ich mag die. Formen von Alex sehr. Leider habe ich noch keine.

Title: Re: thinking about press moulds with clay release channels
Post by Curious Aardvark on Feb 7th, 2019 at 9:46am
we'll see what I bring with me to mallorca this year :-)
could well be a mould with your name on it Jaegoor :whistle:
jaegoor.jpg (19 KB | 10 )
jaegoor_stamp_706x600.jpg (44 KB | 10 )

Title: Re: thinking about press moulds with clay release channels
Post by Jaegoor on Feb 8th, 2019 at 6:00am
:o
Ich werde leider dieses Jahr nicht in Mallorca dabei sein. Zu viele andere Projekte in diesem Jahr. Zu wenig Urlaub dafür. Im Moment bin ich krank 🤒.

Title: Re: thinking about press moulds with clay release channels
Post by Shale on Feb 10th, 2019 at 11:16pm
I don't know if this is helpful, but CA's suggestion sounds similar to Play Doe molds:

https://www.youtube.com/watch?v=nuiGowZuV3g

Go to 1:27 (I apologize for the music and sound effects)

If hinged molds without channels work with Play Doh, maybe they would work with clay as well.

Title: Re: thinking about press moulds with clay release channels
Post by Curious Aardvark on Feb 11th, 2019 at 6:33am
I use playdoh to test stamps and moulds.
so not short of the stuff lol

I'm surprised how well that icecream mould worked.

For a glande though, you need the starting clay to be all one piece. When you use two halves like that clay doesn't stick that well and the seam is really weak.

I've had two part moulded glandes simply split in two on launch.

Other than that - it's definitely worth a try :-)
Cheers

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