doh!

General Composites Discussions Composites Talk
#41

i do think its the way im applying wax, why? b/c…

mold 1. the part which was plastic reacted badly and sorta messed up but was fixable.

then i made a part and it got stuck and ripped parts out.

mold 2. waxed a bit better and part didnt get much damage this time. maybe 2% damage vs 55 % damage as before.

part 2 from mold 2, i waxed more, part didnt get stuck AS bad but still stuck and ripped parts of the mold off.

So sometime is def. going on. MAYBE i can do what ive seen some do is, Wax 10 times atleast the first time, then PVA 3 mils and then make a part. i should try that see what happens. then wax again, and no pva… hmm… yeah let me try this…

#42

When I had my demolding problem, I found out that I was buffing too hard after each coat of wax. I posted on “how do you guys wax” (your molds/plugs that is! :D) somewhere on this forum a couple of months ago.

Now I just apply very little pressure with the microfiber towel. In thicker areas it takes a little longer with the light pressure but i just keep going over it rather than trying to scrub it out.

#43

Thats exactly the problem I think a lot of people new to composite work have when using wax!

Also worth bearing in mind that if you are trying to use a plug made of different materials, that its probably going to be well worth applying some sort of surfacing finish, which will lessen the chances of any problems with sticking.

#44

like i said, i have no problems with the plug, its the actual part coming out of the mold for production. i think its the partall, ive had it for awhile now and it needs to be replaced.

#45

Eh, get some Frekot! 55, or 700
(Henkel/Loctite)