Vacuum forming a dual laminate

JKraver

JKraver

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Brand new.
The problem I'm having is that the peripheral stays colder than the center.
I can't seem to find the sweet spot as with other laminates.
Maybe a heat gun would help.
Heat gun would probably bubble your laminate.
 
Doris A

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Brand new.
The problem I'm having is that the peripheral stays colder than the center.
I can't seem to find the sweet spot as with other laminates.
Maybe a heat gun would help.
Try moving the laminate a little farther away from the heat, it'll take longer to heat up but it should spread the heat all of the way to the edges without bubbling it up.
If you had an erkodent it would be so much easier.
 
JKraver

JKraver

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Try moving the laminate a little farther away from the heat, it'll take longer to heat up but it should spread the heat all of the way to the edges without bubbling it up.
If you had an erkodent it would be so much easier.
Or a drufomat, You can also push the heating element away for a bit to let it evenly heat.
 
rkm rdt

rkm rdt

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Try moving the laminate a little farther away from the heat, it'll take longer to heat up but it should spread the heat all of the way to the edges without bubbling it up.
If you had an erkodent it would be so much easier.
I think you're right. My former is fine for mouth guards and single sheets but I probably need a better one for laminates.
 
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Inna-Hurry

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I leave the heat on over top while it vacuums. you can use the eraser of a pencil to push into vestibule. Go back to suck down 101 hole in palate, no rough edge in border area, model trimmer sides to lock laminate on during cooling so it does not lift, not too tall.
I always horseshoe my palates.... (big hole). Good to see ya back.....
 
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Yeah you need an erkoform from erkodent or similar. You just insert the disc, select preloaded program, and the thing even lowers the disc for you.

They pay for themselves pretty easily.
 
rkm rdt

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Yeah you need an erkoform from erkodent or similar. You just insert the disc, select preloaded program, and the thing even lowers the disc for you.

They pay for themselves pretty easily.
It may be time to invest in one of these units.
 
rkm rdt

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So I formed a soft eva.040 .
trimmed it and then formed a hard .040 over it.
I don't see any delamination.
 
JKraver

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So I formed a soft eva.040 .
trimmed it and then formed a hard .040 over it.
I don't see any delamination.
Hmm, I don't have experience laminating like that. They come in pre laminated sheets as well. From the essix raintree course i took a few years ago, the hold time is super important it is something like 6 min under 90psi pressure in the drufomat.
 
rkm rdt

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Hmm, I don't have experience laminating like that. They come in pre laminated sheets as well. From the essix raintree course i took a few years ago, the hold time is super important it is something like 6 min under 90psi pressure in the drufomat.
Great lakes ortho shows their technique and so I'm trying it with my machine.
 
JKraver

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Great lakes ortho shows their technique and so I'm trying it with my machine.
Should work. I would just worry about delamination down the line.
 
rkm rdt

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Should work. I would just worry about delamination down the line.
I think the 1mm thickness has a better chance of laminating to the soft material than if it were thicker.
I am testing this on myself for now.
 
Doris A

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I think the 1mm thickness has a better chance of laminating to the soft material than if it were thicker.
I am testing this on myself for now.
Let us know how it holds up.
 
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kytoothdude

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I think you're right. My former is fine for mouth guards and single sheets but I probably need a better one for laminates.
I'm using an old school Omnivac ! You need a thin palateless cast and it works fine.
 
rkm rdt

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I'm using an old school Omnivac ! You need a thin palateless cast and it works fine.
I'm forming over a printed arch with no palate.
The more I research formers the more I'm convinced positive pressure is more accurate than vacuum.
According to great lakes ortho, vacuum produces 14 lbs vs 60 lbs pressure.
 
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Inna-Hurry

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I'm forming over a printed arch with no palate.
The more I research formers the more I'm convinced positive pressure is more accurate than vacuum.
According to great lakes ortho, vacuum produces 14 lbs vs 60 lbs pressure.
Ahhhh. Again more pertinent info leaks out.... PRINTED MODELS ARE plastic. They have no air inside for the vacuum to suck through. May not work. Thanks for sharing this detail. DUH.
 
rkm rdt

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you got me there.

"They have no air inside for the vacuum to suck through."

That's what I thought 4 years ago so I experimented. Single laminates form no problem regardless of the thickness.
I posted the results on my FB Trios study Club page .
 
JKraver

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Ahhhh. Again more pertinent info leaks out.... PRINTED MODELS ARE plastic. They have no air inside for the vacuum to suck through. May not work. Thanks for sharing this detail. DUH.
... I cannot imagine air being pulled through the model, at least at a rate that it would matter.
 

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