Talk Composites - The Forum for Advanced Composites

Is it possible to make a part with an "a" side on both the front and back in one go?

http://www.talkcomposites.com/Topic33337.aspx

By Jack Clark - 7/18/2019 2:51:50 PM

Hi I'm hoping that someone can help me!

I'm making some prototype flat parts. At the moment the surface finish isn't relevant as i need to finish strength testing the parts to finalise the lay up.
At the moment I'm using 5mm 3DCORE in the part and I'm wet laying up all the carbon and core in one go and then putting under vacuum. 

When I come to make the actual part I will resin infuse it so I get a better surface finish and it's what the core is designed for.  I'm trying to figure out a way to get the same surface on the back as on the front. The only thing I can think of is to have a 2 part closed mould where I lay up everything into the mould wet and then put the two halves together and put in an envelope vacuum bag? but I can't see a way of doing that using resin infusion?

Any help or opinions greatly appreciated !
I've attached a picture of one of the test parts still in the mould for reference. ( I will also be making a new mould before I start infusing) 
By Fasta - 7/19/2019 1:09:36 AM

 
Jack 7ch - 7/18/2019 2:51:50 PM
Hi I'm hoping that someone can help me!

I'm making some prototype flat parts. At the moment the surface finish isn't relevant as i need to finish strength testing the parts to finalise the lay up.
At the moment I'm using 5mm 3DCORE in the part and I'm wet laying up all the carbon and core in one go and then putting under vacuum. 

When I come to make the actual part I will resin infuse it so I get a better surface finish and it's what the core is designed for.  I'm trying to figure out a way to get the same surface on the back as on the front. The only thing I can think of is to have a 2 part closed mould where I lay up everything into the mould wet and then put the two halves together and put in an envelope vacuum bag? but I can't see a way of doing that using resin infusion?

Any help or opinions greatly appreciated !
I've attached a picture of one of the test parts still in the mould for reference. ( I will also be making a new mould before I start infusing) 

You can resin infuse with the closed moulds. You may need to plan the resin inlet and vacuum details within your 2nd mould flange. Looks like it could have the resin inlet right in the middle and vacuum around the outside, or it could also be done the other way around.