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Massimiliano
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Group: Forum Members
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+xRun the feed spiral up one side and the mti up the other. Thank you. I did like you suggest with the other infusions but this one has 600 € of carbon in it and I am very worried of a mistake leading to a bad part, so I would prefer to waste some MTI but be more confident of the result.
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Massimiliano
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Group: Forum Members
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+xFor large infusions, I take a strip of flow mesh an stitch it to an omega like shape around the spiral feed tube. With that technique the spiral tube can be set off from the part, and leaves no traces at the part at all. Dd compound sells a product like this if you need further clarification. Thank you for the hint! For the DD compound product, you mean Blade runner ?
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oekmont
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Group: Forum Members
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For large infusions, I take a strip of flow mesh an stitch it to an omega like shape around the spiral feed tube. With that technique the spiral tube can be set off from the part, and leaves no traces at the part at all. Dd compound sells a product like this if you need further clarification.
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Hanaldo
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Group: Forum Members
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Run the feed spiral up one side and the mti up the other.
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Massimiliano
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Group: Forum Members
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+xIt's much better and much easier to just keep all the hoses off the part. Infusing from the centre is a good idea for larger parts, but for small parts it is really unnecessary and can cause you issues like you've experienced. Just infuse from one side to the other. Run your MTI hose down just the one side. Less issues, and you'll use half the amount of MTI. How big is the mould? If it is under 0.5 metres wide, I wouldn't even bother using spiral hose on the feed side. It's nearly 1.5 meters x 0.80.
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Lester Populaire
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Group: Forum Members
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+xIt's much better and much easier to just keep all the hoses off the part. Infusing from the centre is a good idea for larger parts, but for small parts it is really unnecessary and can cause you issues like you've experienced. Just infuse from one side to the other. Run your MTI hose down just the one side. Less issues, and you'll use half the amount of MTI. How big is the mould? If it is under 0.5 metres wide, I wouldn't even bother using spiral hose on the feed side. While i agree with you and would do the same, for a beginner it would be safer with the inlet in the centre. With a little bit of bridging the racetracking on such a geometry can ruin your part when infusing from side to side. So make the fabrics have to lay in the corners really well.
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Hanaldo
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Group: Forum Members
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It's much better and much easier to just keep all the hoses off the part. Infusing from the centre is a good idea for larger parts, but for small parts it is really unnecessary and can cause you issues like you've experienced.
Just infuse from one side to the other. Run your MTI hose down just the one side. Less issues, and you'll use half the amount of MTI. How big is the mould? If it is under 0.5 metres wide, I wouldn't even bother using spiral hose on the feed side.
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Massimiliano
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Group: Forum Members
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+x+xSo I did it and I am not dissatisfied with the result. I have given a try to the MTI hose and very happy with it, but the resin inlet spiral left a bad print on the part: seems like the carbon under the spiral is more compacted than the rest. And the immediate surrounding of the spiral is a little raised. Talking about a fraction of millimeter, but still very visible. How can I prevent this in the future?  Make sure you have enough bag above the spiral hose, then once the infusion is finished you pull the hose up into the fold of the vacuum bag. Either that or infuse from side to side if the geometry and part size allows for this. Thank you! I will try the fold suggestion as mti videos suggest to place the mti hose all around the part (see the white line in my pic) and place the resin inlet in the middle.
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Lester Populaire
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Group: Forum Members
Posts: 311,
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+xSo I did it and I am not dissatisfied with the result. I have given a try to the MTI hose and very happy with it, but the resin inlet spiral left a bad print on the part: seems like the carbon under the spiral is more compacted than the rest. And the immediate surrounding of the spiral is a little raised. Talking about a fraction of millimeter, but still very visible. How can I prevent this in the future? Make sure you have enough bag above the spiral hose, then once the infusion is finished you pull the hose up into the fold of the vacuum bag. Either that or infuse from side to side if the geometry and part size allows for this.
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Massimiliano
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Group: Forum Members
Posts: 167,
Visits: 1.1K
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So I did it and I am not dissatisfied with the result. I have given a try to the MTI hose and very happy with it, but the resin inlet spiral left a bad print on the part: seems like the carbon under the spiral is more compacted than the rest. And the immediate surrounding of the spiral is a little raised. Talking about a fraction of millimeter, but still very visible. How can I prevent this in the future?
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