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

Talk Composites - The Forum for Advanced Composites

Back

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

Author	Message
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 (514 views, 111.00 KB)
	Reply Like 2
Reply
ChrisR	ChrisR posted 8 Years Ago HOT Post Details
Group: Forum Members Posts: 363, Visits: 3K	1) shrinkage is variable, use as a guide but the test is normally done without reinforcement, this reduces shrinkage hugely. 2) don't know, I don't use it 3) don't know, I never use fillers 4) if using epoxy then woven roving/woven fabric (or powder bound CSM as normal CSM doesn't work with epoxy) 5) resin dependant, I'd be looking to pot a core in to stiffen and reduce cost, if using PE then 3/4 layers tops 6) don't know, I don't do it 7) loads of joining techniques to choose from, skill dependent. easiest will be butt jointed with reinforcement backing on the B-side to join together, if you get better at it then a scarf joint will be 1000% better
	Reply Like 3

Merge into selected topic...

Merge into merge target...

Merge into a specific topic ID...

Threaded View

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

Reading This Topic

Login
Remember Me Reset Password Resend Validation Email Login	Facebook Google

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

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

Merge Selected

Threaded View

Similar Topics

Reading This Topic

Login

Explore

Messages

Mentions

Search