Interesting DLP with novel resin application and release

Share your 3D Printing related links (articles, videos, etc.)

cerberus333
B9 Maker
B9 Maker
Posts: 21

Interesting DLP with novel resin application and release

Post#2 » Sat Nov 16, 2013 8:38 am

That is a very interesting release mechanism.
do you know what the membrane material is?

User avatar
mikej
B9 Moderator
B9 Moderator
Posts: 4190
Contact:

Interesting DLP with novel resin application and release

Post#3 » Sat Nov 16, 2013 9:50 am

Probably teflon FEP, looks like an ET peel sep. patent derivative.
Measure Twice, Cut Once.

User avatar
behold3d
B9 Master
B9 Master
Posts: 535
Contact:

Interesting DLP with novel resin application and release

Post#4 » Sat Nov 16, 2013 11:21 am

so, what is happening then? is the resin spread across the membrane, cured from below, then the membrane is rolled away?

giacc
B9 Maker
B9 Maker
Posts: 49

Interesting DLP with novel resin application and release

Post#5 » Mon Nov 18, 2013 2:21 am

Hi Mike,

I have not finished assembling my B9 (resin is on it's way), so I don't fully understand this, but I wonder ¿why not use a simple teflon film on the B9 vat, instead of the must-be-replaced PDMS?

User avatar
mikej
B9 Moderator
B9 Moderator
Posts: 4190
Contact:

Interesting DLP with novel resin application and release

Post#6 » Mon Nov 18, 2013 2:58 am

giacc, teflon will not inhibit cure of a thin layer of resin, so there's no lubricant to slide on.
Measure Twice, Cut Once.

giacc
B9 Maker
B9 Maker
Posts: 49

Interesting DLP with novel resin application and release

Post#7 » Mon Nov 18, 2013 3:15 am

I'm confused, Mike. How does it work on the video above?

benoy
B9 Maker
B9 Maker
Posts: 62

Interesting DLP with novel resin application and release

Post#8 » Mon Nov 18, 2013 3:44 am

Mike,
When you are using the teflon you do not need lubrication as the sliding of the vat is not needed. It only needs to lift the print table with the print out attached to it. It will release from the vat bottom as it is pulled up by the z axis motor.
Benoy

User avatar
mikej
B9 Moderator
B9 Moderator
Posts: 4190
Contact:

Interesting DLP with novel resin application and release

Post#9 » Mon Nov 18, 2013 3:44 am

In the video above there is no sliding, only peeling off of the film. We slide to the deep end of the vat to release the vacuum force so we can then lift. It's a different method altogether.
Measure Twice, Cut Once.

giacc
B9 Maker
B9 Maker
Posts: 49

Interesting DLP with novel resin application and release

Post#10 » Mon Nov 18, 2013 3:52 am

In that case, a teflon film would work if the build table rises instead of vat sliding. This is truly possibly, right?

User avatar
mikej
B9 Moderator
B9 Moderator
Posts: 4190
Contact:

Interesting DLP with novel resin application and release

Post#11 » Mon Nov 18, 2013 4:07 am

Yes, and truly patented. The separation force can be harsher than sliding, IMO. Teflon film peel has a host of issues, it's not the holy grail.

The holy grail would be an oxygen permeable, transparent, hard surface (scratch resistant) window.
Measure Twice, Cut Once.

jcourtem
Newbie
Newbie
Posts: 7

Interesting DLP with novel resin application and release

Post#12 » Tue Dec 10, 2013 12:28 am

Check the Solidator DLP Desktop 3D Printer on kickstarter.

See the answer I got about PDMS below:

“Hi,
thank you for your interest in our project. We do not use PDMS as this has been proven to break easily and require you to remove the resin from the tank after each print.
Instead our special VAT uses a patent-pending technology to allow for non-stick here.
That technology is why we can print that large.
Tim”
“…yes that is correct. There is nothing you need to do to maintain the non-stick property. There is no vaccum and no such effect in our technology. There is also no peel-off effect necessary. We can print a 0.27x0x27x0.01 mm Voxel, so yes we can print very small parts without breaking them…”

We may be able to find a PDMS replacement on our B9 one day.
Jean

User avatar
mikej
B9 Moderator
B9 Moderator
Posts: 4190
Contact:

Interesting DLP with novel resin application and release

Post#13 » Tue Dec 10, 2013 1:43 am

If I had to guess, I'd suspect they've just stretched a sheet of teflon (like a drum skin) taunt and are printing on that. Hard to know for sure since they are closed source.
Measure Twice, Cut Once.

giacc
B9 Maker
B9 Maker
Posts: 49

Interesting DLP with novel resin application and release

Post#14 » Tue Dec 10, 2013 2:39 am

Mike, would the stretched-teflon be an alternative on the B9?

User avatar
mikej
B9 Moderator
B9 Moderator
Posts: 4190
Contact:

Interesting DLP with novel resin application and release

Post#15 » Tue Dec 10, 2013 4:05 am

Yes (But not in combination with our slide release), but it's a patented peel method and I don't want to get sued. Also, you get a slight sag from from gravity and pushing back down against it to squeeze out resin. There are also sorts of variations, but nothing's perfect.
Measure Twice, Cut Once.

Return to “Links”

Who is online

Users browsing this forum: No registered users and 1 guest

cron
Close Menu Shop Forum