Infusion Plan

Jorge what you are looking for from Groper is this link.

HTH,

 

Oh ok, I see, nice! ... so do do you drill holes on the flat side facing down, have to go back to gropers build and backup a page or two, thanks!

 

Its #179 on page 12. I don't think he does anything to it. He shows it in action on #184 page 13.

 

yeah I went back in his thread and saw he uses a thinner version of the joint trim I was looking at, Thanks!!

 

Dont do anything to it, but make sure the bag is pulled tight over it so there is a bit of deliberate bridging which allows the resin to flow off the edge of the strip and onto the flow media. If you dont have this bridging of the bag, it can block the resin flow.

If doing it all over again, i would use the grid scored foam Jorge - but i still had some perforated only foam left and so had to infuse it with flow media... it does add about 400grams per meter tho, if if one was very weight conscious, would have no choice but to keep using the flow media...

 

I see, nice!!

I tell you, I don't care about that little bit of extra weight if I can get rid of that stupid flow media and perf release film... I am using it!! It would only come to about 20lbs for my whole boat!


I had to tape my bag up again. Could only find 110" vfold material so made three sections. That shrink wrap plastic has too many pinholes in it, we need to find a material that is affordable and air tight next!! lol ))

 

My cheap shrink film doesnt have pinholes... maybe try a different supplier...

 

Groper what mil is your film ... I think the one I got is too thick 12 mil

 

We dont use "mil" over here in the rest of the world we measure plastic sheet in micrometers... my film is 100uM which i *think* is ~1/3 the thickness of 12 mil...?

The roll i got is 4m wide * 100m long virgin polyethylene - not recycled, cost $140. I use it as throw away table plastic also for wetting out my glass tapes and hand laminating...

 

I am going to have to find some better stuff then, I think what I have is poor quality. Thanks!

 

Yep, 100 um = .004

 

um?! Man the rest of the world is so screwed up!!

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Ok, just kidding lol ))

 

a 'mil' is 1/1000 inch.

12 mils =
0.012 inches

100 micrometers =
0.00393700787 inches

Groper, I was thinking you were just using regular (not shrink film) 100uM (4 mil ) polyethylene sheeting from the building supply (Home Depot)?

 

Nup, i seached for a while and rang a few suppliers before finding what i use today. Its designed use is a PE shrink film. If there is pinholes in a shrink film, these will blow out into big holes when the film is heated. So they use a virgin (non recycled) PE film and whatever else they do to it... 400 square meters for $140 bux, no leaks... cant beat that! I bought a roll of PE building film before this, a type of clear visqueen etc... it was full of pinholes and useless for infusion... i ended up using it up as a barrier layer on my table for wetting out glass, hand laminating etc...

The proper vac bag from the composite supplier is 100sqm for $150... over 4 times the price per area... same goes for pretty much all the infusion consumables, there are cheaper alternatives if you go looking...

 

I used this stateside to vacuum clamp the mdf I was carving for a mold. About 1USD per square meter. Its heavy @ 6mils. And it does not stretch to speak of. But it did not rip when there was an unsupported bridge of 3-4 inches. http://tiny.cc/sheet The 4 mil product felt too stretchy in my hand. I thought it would rupture under full vac.