coating a foam plug

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coating a foam plug

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si3211	si3211 posted 11 Years Ago HOT Topic Details
Group: Forum Members Posts: 9, Visits: 106	I've roughed out a foam plug for some new bodywork working off cad drawings. I've used celotex type low density insulation and i'm now looking to start coating and filling. I was considering covering the foam plug in a fibreglass skin and then building up the finish in layers of polyester primer filler. Can you recommend a suitable cloth and a whether I can use a polyester resin or ?. I have made the plug approx. 3mm smaller than the finished item to allow for a finished build up. ( I attach a photo pre sanding to give an idea of curvatures. Thanks Tags Pattern Making plug
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Hanaldo	Hanaldo posted 11 Years Ago HOT Post Details
Group: Forum Members Posts: 2.5K, Visits: 28K	He didn't mention anything about a cnc? CAD drawings don't mean he is using a cnc machine. I don't see any reason filleting wax wouldn't work, though it wouldn't need CNC'ing at all, it's so easy to hand shape. Which is largely why I would never use it to form a large pattern. It's so easily impressionable, if you picked it up at all you'd leave marks possibly even dents or gouges on the surface... It's also not a particularly good surface for a mould, so you would want to resurface the whole mould before using it which is a bit of work. All in all, fantastic material for filleting, not so great for large areas.
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*VVS*	*VVS* posted 11 Years Ago HOT Post Details
Group: Moderators Posts: 226, Visits: 334	Hanaldo (25/06/2015) He didn't mention anything about a cnc? CAD drawings don't mean he is using a cnc machine. My miss read. Any coatings that you can machine then mould from?
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coating a foam plug

si3211 - 11 Years Ago

Always better to do a test using the stuff you've got, there's so many different types of foam it's...

Hanaldo - 11 Years Ago

Perhaps I'm missing something but why are you going to sand, surely if you have cnc you can finish...

VVS - 11 Years Ago

He didn't mention anything about a cnc? CAD drawings don't mean he is using a cnc machine. I don't...

Hanaldo - 11 Years Ago

[quote][b]Hanaldo (25/06/2015)[/b][hr]He didn't mention anything about a cnc? CAD drawings don't...

VVS - 11 Years Ago

i've used a cad model and sliced it into sections. Im not using cnc just finishing by hand. Really...

si3211 - 11 Years Ago

I would think about a single light layer of fibreglass, either a tissue/vale fibre glass, a light...

Fasta - 11 Years Ago

Hi I normally use a lightweight mat and epoxy resin or you could use the EC pattern coat primer...

carbonfibreworks - 11 Years Ago

Thanks, it looks like a light cloth and epoxy resin might be the safest option if not the cheapest....

si3211 - 11 Years Ago

p.s the foam is celotex insulation , a low density polyurethane foam.

si3211 - 11 Years Ago

Hi This EC tutorial may help....

carbonfibreworks - 11 Years Ago

Thanks, i've seen that and it looks great, butthe foam i'm using though is a lot lower density, and...

si3211 - 11 Years Ago

Your foam isn't too low density, it will be fine using the EC pattern coat system.

Hanaldo - 11 Years Ago

I use a low density PU foam board (Xtratherm) to make my male plugs. I then coat the foam with two...

philiplardner - 11 Years Ago

If you are worried about the strength of the foam then just hand laminate a layer of woven glass...

Warren (Staff) - 11 Years Ago

Hi there all, I've finally finished the plug and i'm now looking to takeoff amould . I feel...

si3211 - 10 Years Ago

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