Talk Composites - The Forum for Advanced Composites

Split mould leaking

http://www.talkcomposites.com/Topic21063.aspx

By Finnluxury - 4/16/2016 12:02:18 PM

Hi!
I would want some new ideas for a split mould. My last mould was leaking between the flanges. I am going to use resin infusion, so its critical that there is no air leaking. I included a photo of the part. It will be a three part mould. I will make splits above the door. Second photo has one idea I got, that the flanges would have 90 degree angle at the end, so i could put vacuum tape on it. blue and white line are different part of the mould. black line is plug. Top of the blue and white line is the vacuum tape.

Its impossible to vacuum bag the whole part, as its so huge. And I really wouldn't want to hand laminate this. 

http://www.talkcomposites.com/Uploads/Images/aab3a75c-6ded-4ac1-9b98-1704.png


http://www.talkcomposites.com/Uploads/Images/e499f20f-f29b-44c4-b942-634e.png
By Finnluxury - 4/17/2016 11:48:02 AM

I will test this silicon today. I bought Loctite SI 5926 blue as u menthioned. Thanks everyone for a good tips. If this silicon works well for the split mould, I may use it for the roof part also. The roof part will be a huge mould, I am going to use EC uni mould system for it. Never tried uni mould system before, but looks to be good when watched some of the EC videos of it. Usually all my moulds are made from epoxy tooling gelcoat, and epoxy putty, but this part is way too big for that method. I must design a good steel structure, and wheels under the mould, so i can easily move the parts of the moulds side ways.

http://www.talkcomposites.com/Uploads/Images/477aa7ca-f4f9-4c32-ab67-e019.jpg

http://www.talkcomposites.com/Uploads/Images/70e44baf-7f82-4169-bc11-1b09.jpg

http://www.talkcomposites.com/Uploads/Images/ed56c452-ee1d-4009-97b6-92b8.jpg

This is what the final part should look like, before trimming the window holes.