Casting A Hull In Polyurethane?

Waterproof Housing, Frames, and Buoyancy Methods.
Post Reply
rehoward
Posts: 49
Joined: Dec 15th, 2015, 5:41 am
Location: Everett, WA

Casting A Hull In Polyurethane?

Post by rehoward »

Hi all,

I was wondering if anyone has cast from resin a polyurethane part? In my case it would be somewhat large, cylindrical with a 1/4" wall and domed end. Also it would be a high durometer with very good stiffness. Think like a SCUBA tank vessel but open on one end, and much smaller, like 6" in diameter.

My thoughts were to 3D print a pattern and then investment cast it in plaster. Then burn out the investment so I have a hollow mold cavity. Pour in the urethane resin and vacuum out the entrapped air. Or I could alternately do an aluminum casting using a similar approach.

So, anyone done any urethane casting like this? I expect aluminum might be cheaper as resin in small quantities seems to be expensive. I am open to additional ideas but the end result must look professional.

Randy
Post Reply