You mean oil that drains back from the cheaper pumps. That will not pass the membrane, that has also been tested (by several customers:D) They were happy and told me that the oil stayed in the hose and did not travel in the fabrics.
…but of course the better option is to use a pump with a non-return valve on or in the inlet.
This looks like it might solve all my problems…
Is there any distributor in the uk?
I have read all 28 pages and getting a little excited about the product!
im making items where the visual finish is important…
can I just confirm that I wouldn’t need to close the resin in line…
just put my open resin mixing cup 1m below the item?
or does the resin source need to be sealed and pressurised to the same as the bag before being lowered 1m/3ft?
If you produce cosmetic parts you can place your resin pot 1m below the part and let the feed line open. You will have a VF of about 50% and if all other parameters are perfect you will also have a perfect pinhole free part.
There is still no distributor in the UK because they all do not like the product, thats a problem we only have with UK distributors. They even do not answer mails.
Contact www.hp-textiles.com for order some MTI hose and www.dd-compound.com for further informations.
thanks so much for the info DD , ill order some from hp-textiles on payday :)…
i read that you tried easycomposites, did you also try ecfibreglasssupplies.co.uk? they have the vsm2 so maybe they will understand your products application and how as it is flexible it will be alot better!
Just an update. I’ve been using the MTI hose for pretty much every infusion. The hose may be slightly on the expensive side but it really helps I think with ease.
Like I mentioned in one of my posts earlier as well, you can actually take the spiral hose out afterwards and reuse that for traditional infusion or use it for resin inlets which I do.
When I run out of my 100 yards I’ll be purchasing more too. Great product, easy to use, and I feel that using it has also saved some parts as well for me.
Just a quick question though, what’s the thickest part you could infusion using the mti hose? 1/2 an inch, 1 inch, 2 inches? Any thoughts or experience?
I do not think the MTI hose is the limiting factor. You just need to keep in mind the amount of resin you need, and the amount of feed hose to get that resin in the part within a certain amount of time, keeping in mind the reducing speed over time.
On the other hand, the MTI hose restricts airflow, so if you use large resin feeds, you will probably need more MTI hose, to keep up. However, I feel the only restriction of the MTI hose is when pulling down a bag. That takes somewhat longer, but that is not a big deal.
We have customers in the wind energy that build 63m blades with the MTI hose and do not have a problem. At that size the membrane is not the limiting factor so there is not really a difference between MTI hose and spiral wrap.
The thickest laminate we made was 120mm Glas in one shot. Also in thicknes the limiting factor is not the MTI hose ist is the resin.
just got my sample a few days ago. very excited to try it! however my superiors (and our bottom line for the product) wont allow its use in our production… thats OK… i will use it for a personal project eventually and report back. maybe eventually i can “sneak” a test into a production part and show the bosses the results…
i was wondering however - and i hope this makes sense, here goes:
i was playing with brake zones somewhat in our infusions using peelply and even fiberglass. havent tried breather yet. anyway, i was thinking that instead of using the MTI hose as a perimeter for a part, with some careful braking zones in a large pleat in the center of the bag, perhaps the resin front could be delayed to reach the hose until it has infused the entire part. so if a part were for example 1 foot x 3 feet, instead of using 2 yards of MTI hose on the perimeter, use 1 foot in the center of the bag and infuse the part from the perimeter. i know many here are not fans of that technique but i think it might be beneficial to cut down the amount of MTI hose required… that is if it outweighs setting up the bag and braking zones
anyone tried that yet?
-david
Infusing perimeter inwards is a lot faster (expect 4 times faster). You will need to make sure your sealant tape is free of leaks, however.
But MTI hose can be a big help there: First of all the pressure drops, so leaks are slightly less an issue.
Second, the resin will not enter the hose, so a brake zone is not needed. You could even place the MTI hose on top of the part, instead of in a pleat. (if you can live with the imprint). You can also have the MTI hose in a pleat, even connected to the part with infusion mesh.
A very high vacuum is recommended though.
Ouf course can you infuse from the perimeter inwards. But you always have a “flow wedge” that will be closed at the upside first so that you might enclose some gas on the surface side of the laminate in the middle. On parts were no perfect surface is requested it is no problem, on a cosmetic and high structural part I would not recommend to do that.
Hey guys. What is a good site to get this hose from in the US?
I ordered the sample hose and tried it on a small motorcycle part and it worked very well, I have tried to place order for 25 meters and did not get a reply. Its a pity as it is a good product but I need a reliable source.
Chris Alty
www.carbonfibreworks.co.uk
Hello,
where have you ordered?
Hello Dominik
I have sent you a copy of the email.
Regards Chris
Thank you for the quick response Dominik, I have now ordered the hose on line.
Regards Chris
I am about to try to make test part, I have only the materials I used for wet layup of carbon.
wax,pva,epoxy primer, wet out carbon,peel ply, breather and then bag.
after watching the youtube videos I dont have the exact materials on hand to copy the prescribed methods.
I have a small part that I will place in a envelope bag as it has no flange.
I would like to try to not use a gelcoat or primer and just infuse the part so i can see if there are any voids. I can spray a clear gelcoat if I have to.
so can I just use the peelply alone? should I use some breather or chopglass as a flow medium? my resin is 1600 cps @25c with a 200 minute pot life. I was told I can heat the resin to lower viscosity. Not sure how best to do that but with such a small part 16 x 16 I think it may wet out 4 layers of 12K. and since it is a thicker resin I figure maybe keeping the resin from the Mti as long as possible may help in complete saturation?
I dont mean to clutter up this thread, if there is a more appropriate place to discuss setup/use of the MTI for infusion I would be glad to move this question there.
Hello Tom,
you will need some special infusion materials. Your Epoxy is very thick, you should look for a infusion epoxy system.
You also need a flow media, sealant tape and a tight vacuum bag. I prefer multilayer films.
A perforated release film is not necessary but it will make life easier to release the flow media.
Ask for samples for your first try. If you will keep on posting here we will help you step by step to make a perfect infusion.
If you are set up for infusion and have not tried the MTI hose you must give it a try, I used it on a complex shape motorcycle body part for the first time and was more than pleased with the results. I have now placed my order for some more MTI.
Chris Alty
carbonfibreworks.co.uk