Yes, sure that is possible. I am currenty cutting a video which shows the making of a mould from a plug that has no flange. I will post when it is on YouTube.
Making a mould with infusion is the best way to produce airtight moulds.
It’s funny you mention this. My first mould turned out bad so I actually cut the flange off of one side. I bag the entire part and on the other side I have a very small 1 inch flange.
I just run the hose around and it works fine. Really ugly, but fine.
The video about the infusion of a flangeless plug/mould has been uploaded on YouTube. Simply substitute the nonexisting flange through overlapping peel ply. Then fix the MTI hose on top and run the infusion process in an envelope bag.
OK, lets envelope mould…
Just kidding…
Anyhow, using MTI definately reduces the amount of flange. Basicly you just need enough for sealant tape. (if enveloping is not possible)
It’s probably out of the original trheads but your pic brings me to a question about doing infusion with a multi-parts mould.
What’s the best way to seal the parts of the moulds in order to dont have leaks between the joining flange?
Ask this question because I’m gonna have to infused a parts with a three parts mould.
thanks for your helps
I took the liberty to open a new thread for this question:
http://www.compositescentral.com/showthread.php?p=45631#post45631
Thanks Herman:) and sorry for the out of thread post :unsure:
Herman, I like your humor:) and your expertise…
To be very honest a very similar mould to the one I pictures was made in PU extruding paste, then CNC cut. There were unavoidable airpaths, so they were having problems with infusions. The backing structure was heavy ironwork / wood / foam.
Their idea was to envelope mold the thing, with bag bridging all over. So it was not my idea… I talked them out of it, told them to just stick sealant tape over the leaky patches, and repair and fair afterwards.
Next mould they CNC-ed a positive, then made a female mould, instead of cnc-ng the female mould directly.
Anyhow, on this project so many things went wrong. The originator was a stubborn nutcase, who manages to kill projects everytime. Anyhow, now he is in Aruba, so he can create havoc there.
To Tom: No problem for out of thread conversations. This forum is the most friendly I visit. One happy family!
It’s one big happy family because you have over 1k in USEFUL posts. In other forums there’s members with 10kplus posts with useless information, haha.
I usually don’t post, just spend time gleaning as much information as possible from all the members here. Have been hoping the day would come when I would be ready to give this product a try. Well the day has come, can you send me an email at sinisterextremes@gmail.com with your contact info. Apparently my post count is too low as when I went to visit your profile I got a “your not allowed”
Thanks,
Joe
some of my work https://sphotos-a.xx.fbcdn.net/hphotos-snc6/c102.0.403.403/p403x403/285750_10200217149224292_916228778_n.jpg
https://sphotos-b.xx.fbcdn.net/hphotos-snc7/385087_175928835831429_1069176819_n.jpg
https://sphotos-b.xx.fbcdn.net/hphotos-snc7/391183_169602139797432_156470702_n.jpg
https://sphotos-b.xx.fbcdn.net/hphotos-ash3/615434_360285164062461_1723766087_o.jpg
Just visit the official US website ofMTI hose or send an email at info@german-advanced-composites.com
Nice work, Joe. The MTI hose is great for visual carbon parts.
I used the MTI hose for the first time and overall I liked it.
Although after my parts were cured I pulled apart the hose and found resin had somehow gotten inside. It was in the middle of the 2 foot piece not near either end so I can’t understand how it got inside. The resin seemed to have come through the cloth surrounding the spiral portion of the hose. Nothing made it into my catch pot.
Anyone else have an experience like this
The MTI hose is designed to cover a wide range of applications. It is possible to use it with the same tube diameter in a 63 yards wind turbine blade mould as well as with the tiniest parts. To manage that in a proper way the membranes micropores have to be big enough to provide maximum airflow and evacuation performance and at the same time small enough to ensure maximum impermeability so that even infusion resin with the lowest possible viscosity cant get through. It actually consists of a compound of three materials:
[ol]
[li]A non-woven fabric which protects the membrane from the inside, improves the airflow and enhances the flexibility of the hose[/li][li]A woven fabric which assures the tensile strength and improves handling[/li][li]The actual membrane which was developed to support maximum airflow on one hand and serves as reliable resin barrier on the other hand. Furthermore it provides a high-quality tactile feature which protects the vacuum film against damage and ensures a pleasant working with the MTI hose[/li][/ol]
Provided that the membrane or the sealing tape has not been damaged during storage or handling it ensures that no resin gets through to your vacuum pump. During countless test series the current textile design has proved its reliability. However it is normal that resin saturates the membrane after a while - depending on the viscosity of your resin - which is visible through a change in colour and not critical to the process.
When using Dahltexx SP2 (which is the MTI hose membrame, but in sheet form, and made by Airtech) my experience is that sometimes very small pinholes exist, which slowly bleed resin. It is possible that the MTI hose also had a pinhole (created during manufacture or later in life).
However I do not feel that the performance of the material is affected by these pinholes, so I would not worry much about it.
May be. We never had a feedback of a customer that they have had these pinholes. In all cases til now this happened because the mebrane was damaged. Somtibes because of a wrong handling like maybe repositioning the fixed hose so that the mebrane was damaged. Or the bag was opened with a cutter and customer also cut the membrane.
Maybe this is the first time a customer realized that. But this will not reduce the function of the hose.
@herman: there is only one quality product;)
your product is not 1.47 meter wide, and 100 meter long… dahltexx serves another purpose, but the principle isthesame.i guess also not everyone is opening their mti hose to see if it is dry. i didn’t…
Ah, you meant the flat membrane. But you know, do not use for infusion if you are not licenced by the EADS.
Pulled some parts from the mold last night and had the same thing happen with the MTI hose. A section about 4 inches long had resin saturation into the membrane. I can tell it came in through the hose membrane and not at the end seal because the ends are free of hardened resin.
I also must add that I believe I am getting excessive resin in in my parts (this is my error) although maybe has something to do with why the MTI hose is getting saturated to the inside.
I checked the hose prior to infusion and could see no cuts or any other flaws in the membrane.
I like the hose, I’m just curious as to why it this is happening? As of yet no resin is making it into the catch pot so It is obviously just enough seeping in to saturate the hose walls.
Here are some pics although it’s hard to make much out from them. The section with the sharpie is where it became saturated. Where my finger is pointing was the end and it was sealed off good, there is no resin there.
For a newbie my parts turned out great expect for a few small blemishes I think are caused by air bubbles, I will post some pics in another thread of them to find the answer.