It kind of looks like your fabric is not coming into contact with the mold in the corners. You def need to press those corners in before infusion. Squeegee the excess resin out of the corners, because it will puddle up in 90 degree corners if you use stretchlon. I also think that the three...
That makes perfect sense actually. I have seen PVA sheet at my local Home Depot. And the thickness i need so it wont fold over and crease on me.
Many thank yous! Sometimes i get a brain fart. : )
How can i get a smooth consistent finish on a carbon panel surface without the odd pits and squigles i get using celophane? I have also use Air Tech's Strechlon as a barrier between my bagging layer and the glass panel i use for tooling, however pulling that off the cured panel before heat...
Yes, saran wrap is excellent and we use it everyday actually. But Mike is right, it depends on what your shape is. It does not do well in compound curves using CF because the saran has a tendency to crease in curves and this creates actual creases in the finished surface of CF that really cannot...
No you do not want foam coming in contact with your epoxy or carbon/glass etc. Your mold should be smooth so your part comes out smooth. And you should consider making your mold with modelling clay and or quick setting cement like "cement all". But there are variables i don't know about your...
http://www.exitengineering.com/
Basically they expand cf within a mold by use of a bladder like an inner tube. But the bladder i think remains in the part permanently so they must be making low cost bladders out of plastic or something.
We do use vacuum pumps from mini fridges. You can buy a new mini fridge for about $60. We make alot of small cf parts and have 10 mold tables with dedicated mini vacuum pumps mounted underneath each wood table. These tables are on wheels as well. If you need more info on constructing your own...
Yes you do get expulsion in between the seems. However, if your mold rubber is at least 1" in thickness all around, you wont get any weird things happenning to your shape (assuming you are working under a vacuum bag). The seam acts as a vent for excess epoxy. And aids in removing any hidden air...
As an afterthought,
If you are new to composites, it really has nothing to do with mold making. Both are completely different realms. But wanting to learn one, will force you to learn the other eventually. But once you get the basics down for both, you are really only limited by your...
