Infusion speed

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Infusion speed

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DorsetBill	D DorsetBill posted 5 Years Ago HOT Topic Details
D Group: Forum Members Posts: 12, Visits: 100	Hi all, Just a quick one. I infused some small items recently, approx 300mm x 150mm with: 650g 2 twil (mould surface) 3 layers of 200 unidirectional Then top layer of 450 2 I then added peel ply and infusion mesh. The top surface just about wetted out, but the mould surface didn’t wet at all. Is there a particular problem I’m having or is there perhaps a way to slow the resin flow to allow it to saturate all layers? Many thanks, Bill
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Lester Populaire	L Lester Populaire posted 5 Years Ago Post Details
L Group: Forum Members Posts: 311, Visits: 13K	+x DorsetBill - 4/18/2019 7:58:30 AM Hi all,Just a quick one.I infused some small items recently, approx 300mm x 150mm with:650g 2 twil (mould surface)3 layers of 200 unidirectionalThen top layer of 450 2 I then added peel ply and infusion mesh.The top surface just about wetted out, but the mould surface didn’t wet at all. Is there a particular problem I’m having or is there perhaps a way to slow the resin flow to allow it to saturate all layers? Many thanks,Bill Cut the infusion mesh short of the end of the fabric and pull the vacuum through a layer of peel ply underneath the vacuum line as a resin break. this way you force the resin to flow through the ply stack vertically. Uni carbon is always a bit tricky to infuse as it is so compact, but i successfully infused thicker laminates without problems in the past.
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JasonFL	JasonFL posted 5 Years Ago Post Details
Group: Forum Members Posts: 51, Visits: 707	Take Lesters advice for sure. My last infusion was 14 layers thick (knife scales), the resin brake was 4 inches, and there was still trapped air coming up half way through the brake. Jason
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DorsetBill	D DorsetBill posted 5 Years Ago HOT Post Details
D Group: Forum Members Posts: 12, Visits: 100	That's great. Thank you both. Do you have a photograph or maybe a link to illustrate this 'resin break'? Thank you very much, Bill
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JasonFL	JasonFL posted 5 Years Ago HOT Post Details
Group: Forum Members Posts: 51, Visits: 707	+x DorsetBill - 4/18/2019 9:11:41 PM That's great. Thank you both. Do you have a photograph or maybe a link to illustrate this 'resin break'? Thank you very much, Bill Jason
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DorsetBill	D DorsetBill posted 5 Years Ago Post Details
D Group: Forum Members Posts: 12, Visits: 100	+x JasonFL - 4/18/2019 9:52:34 PM +x DorsetBill - 4/18/2019 9:11:41 PM That's great. Thank you both. Do you have a photograph or maybe a link to illustrate this 'resin break'? Thank you very much, Bill Thanks Jason - is there peel ply in the resin break area, or just an empty space?
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DorsetBill	D DorsetBill posted 5 Years Ago HOT Post Details
D Group: Forum Members Posts: 12, Visits: 100	+x DorsetBill - 4/18/2019 9:55:24 PM +x JasonFL - 4/18/2019 9:52:34 PM +x DorsetBill - 4/18/2019 9:11:41 PM That's great. Thank you both. Do you have a photograph or maybe a link to illustrate this 'resin break'? Thank you very much, Bill Thanks Jason - is there peel ply in the resin break area, or just an empty space? And I notice, you use an infusion spiral on the outlet side too? Wrapped with peel ply?
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JasonFL	JasonFL posted 5 Years Ago Post Details
Group: Forum Members Posts: 51, Visits: 707	The peel ply goes under my resin line, across the layup and resin brake area, as well as under my vacuum line. It’s a must for uniform vacuum. I use spiral wrap for my vacuum line and mirror it to the resin line. I use peel ply over the resin line, and the vacuum line to protect the bag from sucking in between the spirals. The peel ply also prevents the lines from collapsing at full vacuum (which if you notice in the pic, I didnt take the time to make sure the lines didnt collapse, will work either way). Alternatives to running peel ply across the resin brake is to take individual tows of glass or carbon and run them across the brake to the vacuum line. Spaced out like 1 inch apart. It’s even slower than using a peel ply brake, but does not effect the speed across the flow media, just the speed of the resin across the brake area. This was my old way, but now I’m lazy and just do full peel ply. Jason Edited 5 Years Ago by JasonFL
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Rich (Staff)	Rich (Staff) posted 5 Years Ago HOT Post Details
Group: Administrators Posts: 167, Visits: 4.6K	The problem is more likely as a result of your UD layers; assuming they're running in the same direction, the fibres lock together under vacuum making a somewhat impenetrable layer that the resin can't get through which results in dry areas on the mould surface.
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Lester Populaire	L Lester Populaire posted 5 Years Ago HOT Post Details
L Group: Forum Members Posts: 311, Visits: 13K	+x Rich (Staff) - 4/21/2019 12:01:06 PM The problem is more likely as a result of your UD layers; assuming they're running in the same direction, the fibres lock together under vacuum making a somewhat impenetrable layer that the resin can't get through which results in dry areas on the mould surface. While this certainly doesn't help it is certainly possible to infuse near void free. I do this regularly as i like to work with UD layers.
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