Large 37ltr mould and questions on safely and successfully casting.

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Large 37ltr mould and questions on safely and successfully casting.

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Shinobiwan	Shinobiwan posted 9 Years Ago HOT Topic Details
Group: Forum Members Posts: 14, Visits: 97	Hi everyone. First off thanks to everyone on here. I've read a lot of interesting threads and have learnt a lot. I've got a project going on right now where I need to cast multiples of a large piece. The volume of the pattern is 37ltrs which is around 41kg of resin with no filler. I've worked out the split lines on the mould and I think these will work well given the shape. All surfaces have a draft of 6 degree's and any parallel sides are on the split lines. If anyone can take a quick look over the attached image and just make sure I haven't made any glaring errors. My question is how to cast such a large piece. I'll be using ATH filler in a quantity of 1:1 ie. 1 part ATH to 1 part mixed resin. Will this allow to mix a few batches of resin and pour this in to the mould before the whole thing sets? What's the maximum safe amount of resin/ATH amount to mix in one container? Any idea on pot life? What's the best choice of resin? EC sell xencast P6 which I plan if suitable. Can I do an in-mould coating of pattern coat primer to provide a surface that will accept paint straight out of the mould? Thanks for any help. Attachments Mould1.jpg (484 views, 111.00 KB)
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Shinobiwan	Shinobiwan posted 9 Years Ago HOT Post Details
Group: Forum Members Posts: 14, Visits: 97	Hanaldo (28/12/2016) I would be extremely amazed if there is any thermoset resin system out there that can do a 40kg pour in one shot, even with filler... That is some mass. I'd wager you will need to do it in multiple pours. Is it OK to do multiple pours? Would the part be weakened? If I can get away with allowing the resin to set between pours then that'll make my life much easier. I was under the impression it needed to be done in one shot ie. multiple pours done before the whole casting sets.
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Large 37ltr mould and questions on safely and successfully casting.

Shinobiwan - 9 Years Ago

I did a few large castings a while ago that was about 8kg resin. I used a specific casting...

Fasta - 9 Years Ago

Nice work there! You have me a little worried since you classify 8kg as large. The one's I'm...

Shinobiwan - 9 Years Ago

For me any resin with more than 1kg is large as you likely have to consider resin exotherm due to...

Fasta - 9 Years Ago

I would be extremely amazed if there is any thermoset resin system out there that can do a 40kg pour...

Hanaldo - 9 Years Ago

Will this allow to mix a few batches of resin and pour this in to the mould before the whole thing...

ChrisR - 9 Years Ago

[quote][b]ChrisR (28/12/2016)[/b] why are you casting such a large part?[/quote] Thanks...

Shinobiwan - 9 Years Ago

[quote][b]Hanaldo (28/12/2016)[/b][hr]I would be extremely amazed if there is any thermoset resin...

Shinobiwan - 9 Years Ago

If it's a speaker cab then forget non reinforced unless you can vac form. personally, I'd be...

ChrisR - 9 Years Ago

Thanks again Chris I take it pouring such a large mould using resin and a lot of filler won't...

Shinobiwan - 9 Years Ago

50mm!! you're not building a submarine hull!!

ChrisR - 9 Years Ago

[quote][b]ChrisR (29/12/2016)[/b][hr]50mm!! you're not building a submarine hull!![/quote]...

Shinobiwan - 9 Years Ago

I think you need to post the dimensions of the thing including hole size etc (or pm of you don't...

ChrisR - 9 Years Ago

Dimensions are approx 800mm x 550mm x 185mm. Really important question: What's the shrinkage like...

Shinobiwan - 9 Years Ago

I've been looking into this more thoroughly and I believe I can do way with the two parts joined...

Shinobiwan - 9 Years Ago

1) shrinkage is variable, use as a guide but the test is normally done without reinforcement, this...

ChrisR - 8 Years Ago

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Large 37ltr mould and questions on safely and successfully casting.

Large 37ltr mould and questions on safely and successfully casting.

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