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Main => Builders Discussions => Topic started by: matta757 on October 28, 2010, 08:27:50 AM

Title: Know of a good casting plastic?
Post by: matta757 on October 28, 2010, 08:27:50 AM
Hi guys,

I am looking for a really good quality casting plastic/resin for various cockpit parts. I tried Castin' Crafts epoxy resin but I find that it just isn't hard enough and does not sand well for finishing touches. Anyone know of a casting product that produces a nice, hard result?

Regards,
Matt
Title: Re: Know of a good casting plastic?
Post by: Mike.Powell on October 28, 2010, 09:41:19 AM
Quote from: matta757 on October 28, 2010, 08:27:50 AM
Hi guys,

I am looking for a really good quality casting plastic/resin for various cockpit parts. I tried Castin' Crafts epoxy resin but I find that it just isn't hard enough and does not sand well for finishing touches. Anyone know of a casting product that produces a nice, hard result?

Regards,
Matt

No personal experience with this product, but it looks good...
http://bare-metal.com/Pathway%20Polymers-Por-A-Kast-Polyurethane-Resin-Casting.html
Title: Re: Know of a good casting plastic?
Post by: dharrison on October 28, 2010, 06:01:40 PM
Smooth-on. That is what I use to cast modeling parts. A pressure pot is good but not 100% necessary. If you are giong to make them commercially then you need the pot. Smooth on has the Resin and the urethane rubber. I would be happy to talk to you about casting if you are interested.

The smooth-on website has alot of good info too. When I get my modeling stuff out of the garage I will tell you what rubber and resin I have.

www.smooth-on.com

Buy or comendeer your kids legos as it makes great mold boxes!

Don
Title: Re: Know of a good casting plastic?
Post by: matta757 on October 28, 2010, 06:16:46 PM
hey guys,

i have used TAP plastics new "platinum silicon" to create my molds... they are excellent, but like i said, i just need a better plastic resin that is harder!

matt
Title: Re: Know of a good casting plastic?
Post by: dharrison on October 28, 2010, 06:47:22 PM
Resin works great, you need a polyurethane resin. Check smooth-on. Their resin is quite good and they have different types of hardnesses. Smooth-cast 300 or 305 is good. Depends on how much time you want to work with it. I usally use resin with a 30 minute demold time.

The only problem with polyurethane resin is that it is toxic. If you are sanding and filing you need to wear a resparator as it causes lung cancer.

Don
Title: Re: Know of a good casting plastic?
Post by: Aerosim Solutions on October 29, 2010, 02:48:27 AM
I am having good results with the Polyurethane resins from www.aldax.com.au

Cheers Gwyn