Lets say you wanted to lay up a fiberglass sphere inside a female mold. You could lay up glass over an air bladder, assemble the halves of the mold around the bladder and fiberglass, and then inflate the bladder inside the mold to press the fiberglass into the mold halves. We’ll say you want to pressurize the bladder to 2 atmospheres, or about 30psi. If you then vacuum-bag the entire mold and draw a complete vacuum, can you effectively reduce the stress on the female mold to one atm?
How might one mold a sphere otherwise?
Lets use this analogy to a one-piece motorcycle tail. I want to mold a tail. How do I get the fiberglass into all the nooks and crannies without using an access hatch? I want the tail to be structural so to me, just having 3 or 4 layers isn’t strong enough without a corresponding structure on the backside…Thoughts?
Thanks,
Matt