Wots the easy/cheap plastic to use with a putty moulding please ?

...and how to do so...
ranger3
KVRian
619 posts since 28 Nov, 2006

Post Thu Aug 01, 2013 5:28 am

Hi

I'm gonna try and make a spare part using a putty molding

Wots the best& easy & cheap plastic I can use to pop into th e molding to make a reproduction of my original item please.

Thanx in advance,
RM

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whyterabbyt
Beware the Quoth
27248 posts since 4 Sep, 2001 from R'lyeh Oceanic Amusement Park and Funfair

Post Thu Aug 01, 2013 7:10 am

ranger3 wrote:Hi

I'm gonna try and make a spare part using a putty molding

Wots the best& easy & cheap plastic I can use to pop into th e molding to make a reproduction of my original item please.

Thanx in advance,
RM
i wouldnt spec plastic for making a spare on cost, i'd spec it on the qualities of the material. nae point trying to use using silicon rubber for a gear, or cast resin for a flexible housing, get my drift? :shrug:

in other words; neads moar info.
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ranger3
KVRian
619 posts since 28 Nov, 2006

Post Thu Aug 01, 2013 8:02 am

Hi,

I've got a plastic synth (wheel)part I want to reproduce.
I thought of using the putty to,making a casting of the original .
But I'm not sure wot material plastic wise, to use to make the reproduction .


Thanx.

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nix808
KVRAF
3803 posts since 22 Jul, 2006 from Tasmania, Australia

Post Thu Aug 01, 2013 2:37 pm

You could use epoxy resin,
it's expensive and bad to breath the fumes from it though.
Araldite is a common brand here.
It's a two part, that starts setting when you mix the parts.

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whyterabbyt
Beware the Quoth
27248 posts since 4 Sep, 2001 from R'lyeh Oceanic Amusement Park and Funfair

Post Fri Aug 02, 2013 12:50 am

You might want to look at Polymorph... its a similar plastic to that used in 3D printers, and can be melted in hot water. Fairly solid when cool.

Can be a bit tricky to work with, since it has to be handled hot, but its got more 'give' than something like resin, so maybe not as brittle.

I would say, though, that whatever youre using, getting fine detail/hard edges is going to be difficult; without a fair bit of pressure (eg injection moulding) you're talking about a liquid that's only 'flowing' into place, not being forced into it, then hardening.

It might be worth having a search on instructables.com for instructional projects people have done of a similar nature (not the part, but the process)
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nix808
KVRAF
3803 posts since 22 Jul, 2006 from Tasmania, Australia

Post Fri Aug 02, 2013 2:07 am

Yeah, I think it's going to be hard to do it well.
I cast in resin years ago, but it was an easy shape(elliptical section)
If you'd like to pay for the part to be 3d printed, I might be able to draw it for u

interesting about that material polymorph W.R.--
but I disagree about resin necessarily being brittle--
West Systems glue is reasonably tough(and harder than Araldite I think), but like I say the fumes make u giddy

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whyterabbyt
Beware the Quoth
27248 posts since 4 Sep, 2001 from R'lyeh Oceanic Amusement Park and Funfair

Post Fri Aug 02, 2013 3:38 am

nix808 wrote:but I disagree about resin necessarily being brittle--
sorry, wasn't trying to say resin was brittle, more that polymorph is more, erm, not brittle. erm. if you see what I mean. Its more on the PVC end of the scale than the acrylic end.
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GaryG
KVRAF
5762 posts since 13 Jan, 2003 from Kent, UK

Post Fri Aug 02, 2013 3:49 am

nix808 wrote:Araldite is a common brand here.
It's a two part, that starts setting when you mix the parts.
I'm intrigued; Araldite over here is a two part resin that I've never thought anybody would 'cast' with, way too sticky and glue-like. Or is my ignorance really shining through? :)
()_()
(O.o)
(")(")

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whyterabbyt
Beware the Quoth
27248 posts since 4 Sep, 2001 from R'lyeh Oceanic Amusement Park and Funfair

Post Fri Aug 02, 2013 3:59 am

GaryG wrote:
nix808 wrote:Araldite is a common brand here.
It's a two part, that starts setting when you mix the parts.
I'm intrigued; Araldite over here is a two part resin that I've never thought anybody would 'cast' with, way too sticky and glue-like. Or is my ignorance really shining through? :)
Im used to araldite being an adhesive, but there seems to be a casting resin in the range...

http://www.resins-online.com/ecommerce/ ... b=Araldite
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GaryG
KVRAF
5762 posts since 13 Jan, 2003 from Kent, UK

Post Fri Aug 02, 2013 7:37 am

Ah, and only £40 a kg... :) I guess this is the stuff you'd use to pot guitar pickups and stuff?
()_()
(O.o)
(")(")

ian.curtis
KVRer
1 posts since 27 Dec, 2018

Re: Wots the easy/cheap plastic to use with a putty moulding please ?

Post Fri Mar 29, 2019 5:41 am

ranger3 wrote:
Thu Aug 01, 2013 5:28 am
Hi

I'm gonna try and make a spare part using a putty molding

Wots the best& easy & cheap plastic I can use to pop into th e molding to make a reproduction of my original item please.

Thanx in advance,
RM
Hi, you should choose the one that works best with your product specifications, e.g. Acrylonitrile Butadiene Styrene (ABS), Polyethylene, Polycarbonate (PC), Nylon, High Impact Polystyrene (HIPS), Polypropylene (PP) and many more

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whyterabbyt
Beware the Quoth
27248 posts since 4 Sep, 2001 from R'lyeh Oceanic Amusement Park and Funfair

Re: Wots the easy/cheap plastic to use with a putty moulding please ?

Post Fri Mar 29, 2019 6:11 am

ian.curtis wrote:
Fri Mar 29, 2019 5:41 am
ranger3 wrote:
Thu Aug 01, 2013 5:28 am
Hi

I'm gonna try and make a spare part using a putty molding

Wots the best& easy & cheap plastic I can use to pop into th e molding to make a reproduction of my original item please.

Thanx in advance,
RM
Hi, you should choose the one that works best with your product specifications, e.g. Acrylonitrile Butadiene Styrene (ABS), Polyethylene, Polycarbonate (PC), Nylon, High Impact Polystyrene (HIPS), Polypropylene (PP) and many more
and given that his question was 'which one will work best', how does that help, 6 years after the fact?
"The bearer of this signature is a genuine and authorised pope."

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