For MTI hose orders can you write a email to:
for USA/Canada : info@dd-compound.com or js@designbikes.de
for Germany, Netherlands, France, Benelux and Swiss : order via HP-Textiles
rest Europe: info@dd-compound.com
Australia? 
hi Dominik.
The MTI looks interesting. Is the in-mould coating one of your products too?
Greg
You can contact me, js-designbikes or HP Textiles. They van all send a sample. The IMC is not direct our product, shipping the IMC is quite expensive.
Thanks Dominik. I have imported resins from Europe before. You are right about the expense.
ASB
I have some sample available in Australia. Send your detail to admin@penetratorfins.com and I will post some out to you. I normally keep stock of it however have just run out. I am hoping to hear from HP Textiles soon about my order.
I am based in Queensland and have sample kits available.
Larry
Larry
I sent you an email.
Thanks
Greg
Hi Dominik, your MTI hose is great. It probably stops resin to overflow from the part. But how can you adjust the resin excess in the feeding region of the part if the user closes the feeding valve late? Thank you.
If there is a overfeed the resin will disperse in the part. Than you have a lower VF. You can also place the resin pot about 1 m deeper than the part before infusion is completed or put a low vacuum on the resin pot so that only the resin that is needed will be infused.
But the easiest way is to stop the resin in before the part is wetted out complete. You need a bit experience herefor, but it works quite well with a VF ± 1%
Hey canyon,
Could you please enable pm’s on my account as well? I have a few questions for DDCompound.
Thanks
Canyon
I’m new in the Composites World but i like to be able also to PMs some members.
Please enable PMs on my account
Thank you very much Best Regards Phsledge USA California
I believe Canyon (forum owner) is still away. Fastest way to gain PM access is to do a few posts, in which case PMs are automatically unleashed.
I will post in the next future
For now I’m setting up my place to start my samples and production
I’m new to this composites world but I have a past with Cnc,plastic injection,
Casting metal(white metal and precious)3d printing,3d sofwares and also all the textile industry
So I will start with infusion and pre preg also.
I’m sure once it will be set I will have a lot of things to ask
So if you please can enable my PM any time I will appreciate a lot
Thank you best regards to all of you with who I learn a lot every day
Reading your posts. Phsledge
One question. How much should be the vacuum to get a perfect part with the MTI hose, how many HG?
Sorry for the diversion but…
I keep wondering who will be the first one to open a web site where you go to buy 3D printer designs from. Like Amazon, but for 3d objects printed at home. In the very near future there will be tons of products printed at home, kitchenware, tools, toys, etc.
Just curious…
Your PM privileges should be activated! For anyone who’s reading this in the future, send me a message with the Contact Us form to get my attention. This site is getting so popular I can’t read every post like I used to (it doesn’t help that I have a job now either)
Try to get your vaccum below 20mbar and you get perfect parts. You also need a 100%tight vaccum bag.
regards Jürgen
Try to get your vaccum below 20mbar to get perfect parts. You also need a 100%tight vaccum bag. I`ve recently bought a Busch pump from ebay for 200€ that is good for 4mbar absolute pressure.
regards Jürgen
his is a great product to use in areas where an area of extremely low permeability material is not able to be utilized. I learned a lesson early on that you really cannot have too much flange area. Knowing this and the fact that resin has a hard time flowing between a flat surface and a bag, I generally just use low permeable materials to slow the flow at the edges of the part. Using the flat flange method also provides resin control of vacuum flow to be guided using a connector material between the part and a perimeter vacuum channel or line. This sounds confusing but it is fairly easy. you simply use a piece of fiberglass strip that connects physically the part to the vac line. This will allow you to strategically fill the panel if difficult geometry and or dry spots are common. By touching the bag to the flange under vacuum will not allow resin or vacuum to go any further into the part than that contact point. I use the glass strips to tailor my evacuation flow in essence pulling the resin towards the strips more so than to areas without a connection to vacuum. In a square flat part it will turn your resin front from a rounded shape into a square filling the corners at the same time it fills the sides. This is in no way to take away from the MIT hose at all. I use this religiously for certain parts and it works wonders. Just something to ponder using materials that you prob already have lying around.
I just had a go with MTI hose. I did a test myself, in order to be able to suggest it to my customers. I did run into some problems, all of which could be solved, and mainly had to do with equipment that I was not familiar with (and which need some modification to work well)
I used a glass sheet as a mould, to obtain a high quality surface.
I choose 2 laminates: 2x200 gr/m2 carbon (twill). Notorious for pinholes. The other was 2x200 gr/m2 carbon, with a layer of Soric SF2 in between.
On top of that NO perf film, No peelply, just Compoflex 150RF. This is a combination of a release film (no holes, the modified surface of the veil allows for a very easy release) combined with an infusion mesh. The infusion mesh is a bit on the slow side, compared to the hard plastic meshes. Just what I need for a good infusion of carbon fiber.
I placed a spiral in the middle, between the 2 laminates, and MTI hose on either end, just on top of the flow mesh. No brake zone, no complicated measuring. I closed one end of the MTI hose with sealant tape, and the other end I pulled the spiral out a bit, cut it off, slide a tube in, and taped the transition with sealant tape. So far, so good.
Then installed vacuum film, and pull a vacuum. This is where the problem started. The MTI hose has quite some resistance, so it takes a while before the bag is down. And if you have too many leaks, the bag will never get down. This is slightly different from a setup without MTI hose, where air is evacuated faster, the bag goes down and the leaks start to whistle. so not this time. This means chasing leaks on the feel. In combination with a sealant tape that I was not familiar with, this was quite a job. It turned out that the sealant tape in the lab was way past the “use by” date, and hardly had any tack or flexibility. (and I am used to very soft, pliable and high tack tape). But after massaging all leaks for 4-5 times, and fixing the seal of the resin catch pot, we obtained a full vacuum. After 30 minutes a drop test (remember the Soric: It needs 30 minutes to equalise pressure). Too much loss of vacuum. I had 3 different leak detectors with me, and after some searching I found a small leak in the (much recycled) vacuum hose. Quick fix with some sealant tape.
OK, we have a dry laminate, a drop test that I was sort of happy with. still some leaks in the catch pot seal, but who cares… Vacuum gauge was past -1. What’s next?
Degassed resin. We mixed a batch of resin, degassed it. I made the resin overflow the mixing cup. Gross. (could not open the valve quick enough. On this machine it involved pressing the centre part of a quick disconnect connector, hardly ideal)
anyhow, the infusion itself was a breeze. No resin entered the hose (confirmed after cure and demoulding). The part infused nicely all the way. After infusion we clamped the vacuum line, left the resin line open, and placed the resin pot on the ground.
Result is a perfect sheet of carbon.
Herman, how much vacuum level remains in the piece if you clamp the vacuum line and left the resin line open?
If resin weight is 1.15 gr/cm3, and your table is 100 cm high, the resin column weighs 1.15gr/cm3 * 100 cm high = 115 gr = 0.115 kg.
1 bar = 1kg/cm2, so the resin column weight “generate” a vacuum of about 0.115 bar, wich will be the pressure balance in the piece. It’s correct or I do something wrong?