Acetat membrane with a resin film recoater, eliminates vat

Discussed here are the various tilt/ slide and Z-Axis mechanisms
User avatar
@A2
Posts: 51
Joined: Wed Apr 23, 2014 7:58 pm

Acetat membrane with a resin film recoater, eliminates vat

Postby @A2 » Mon May 05, 2014 8:29 am

A method that eliminates the vat, it builds the object on top of what looks to like a Teflon membrane that is recoated after each layer.

What are your thoughts on this technology, is it some thing you want to try, advantages/disadvantages?

I'm looking for more information on this separating/coating arm.

Almteq Master Plus 3D Printer - DLP Printing
http://www.almteq.com/nl/gallery/videos/

8:30 min into this video is a clear picture of it.
http://www.youtube.com/watch?v=2MkLD7pY0sA

Carima (I think this is using it)
http://www.youtube.com/watch?v=ow6P-d96f6U
Attachments
ScreenHunter_586 May. 05 08.23.jpg
ScreenHunter_585 May. 05 08.17.jpg
Last edited by @A2 on Mon May 05, 2014 11:26 am, edited 1 time in total.

darrin3d
Posts: 18
Joined: Mon Mar 10, 2014 12:42 am

Re: Teflon membrane with a resin film recoater, replaces the

Postby darrin3d » Mon May 05, 2014 9:50 am

Sort of similar to 3ds v-flash tech from a few years ago.

User avatar
@A2
Posts: 51
Joined: Wed Apr 23, 2014 7:58 pm

Re: Teflon membrane with a resin film recoater, replaces the

Postby @A2 » Mon May 05, 2014 11:21 am

Tks!

The FTI 230 V-Flash® Modeler uses a clear acetate film (cellulose). Has acetate film been tried as a release substrate?

Do you think the acetate film technique has an advantage over using a vat, e.g. printing finer details without distortion?
I'm thinking that there is more work involved to make the resin film deposition tool, than it is to fabricating a vat.

Clear Cellulose
http://www.mcmaster.com/#acetate/=ru0yap

Note how the build platform is releasing from the acetate film. It appears it's raising one side then the other. I made the assumption that this was being patented by Stalactite 102, $2360, Innovative decoupled dual peeling system (patent pending)
https://www.indiegogo.com/projects/stal ... er--2#home

In this video you can see the build platform rocking back and forth on the up stroke to initiate separation.
https://www.youtube.com/watch?v=0Rs7RQpO8p0#t=68

In this video you can see on the down stroke that the build platform rocks back and forth before settling onto the acetate film.
https://www.youtube.com/watch?v=-Dng_a52IFA#t=62

Source Graphics "3D Systems V-Flash" 3D Modeler
https://www.youtube.com/watch?v=xRlm3lQePjI#t=201

Looks like 3d Systems discontinued it?
http://www.3dsystems.com/blog/2009/05/g ... nter-today

The V-Flash operates at about 0.4 inches per hour.

User avatar
@A2
Posts: 51
Joined: Wed Apr 23, 2014 7:58 pm

Re: Acetat membrane with a resin film recoater, eliminates v

Postby @A2 » Mon May 05, 2014 11:08 pm

Dizingof 4 Jan 2013
Funny thing, got Bank mail wrapped with nano translucent sheet. Immediately tested it on a UV resin.. Peels amazingly fast & clean
https://twitter.com/dizingof/status/287188155721990144

I think the translucent sheet is acetate.

tom-res
Posts: 19
Joined: Sun Feb 09, 2014 9:55 pm

Re: Acetat membrane with a resin film recoater, eliminates v

Postby tom-res » Tue May 06, 2014 8:40 pm

If acetate works well as a release film it can be used as a cheap alternative in a vat design like the MiiCraft. I've also heard that LDPE works well in that setup.
I'm mainly posting in the hopes that someone with a working setup can try. So far I've only experimented with top-down but would LOVE a bottom up machine with cheap and simple vat (no tilt/slide).

User avatar
@A2
Posts: 51
Joined: Wed Apr 23, 2014 7:58 pm

Re: Acetat membrane with a resin film recoater, eliminates v

Postby @A2 » Tue May 06, 2014 11:11 pm

I was unsuccessful at locating a liquid acetate to cast. I only found film, injection mold use, and fibers.

Cellulose acetate (CA).
Cellulose acetate propionate (CAP).
Cellulose acetate butyrate (CAB) high ultraviolet stability.

Good paper on the properties of acetate. But it's used as an ingredient in UV resins, I'm guessing that long term use might degrade it. It's also blended in with adhesives, and varnishes. It might be an inexpensive replacement for Teflon film.
http://www.eastman.com/Literature_Center/E/E325.pdf

User avatar
@A2
Posts: 51
Joined: Wed Apr 23, 2014 7:58 pm

Re: Acetat membrane with a resin film recoater, eliminates v

Postby @A2 » Tue May 06, 2014 11:50 pm

A clear view of the acetate film DLP printer.
You can also see there is a take up roller on the right to present a new surface to print on.

Carima
http://www.youtube.com/watch?v=qgxID8Yznh4

http://www.youtube.com/watch?v=sGL6qcGjy3o
Attachments
ScreenHunter_588 May. 06 23.40.jpg

User avatar
@A2
Posts: 51
Joined: Wed Apr 23, 2014 7:58 pm

Re: Acetat membrane with a resin film recoater, eliminates v

Postby @A2 » Wed May 07, 2014 12:41 am

PE is an excellent mold release, apply it with a hair dryer. There are lots of tapes that can be tested.

I've used stretch, shrink wrap for an epoxy mold release, it leaves a mirror smooth finish if you stretch it tight. Stretch wrap is difficult to get rid of all the wrinkles on a large surface.

SURFACE PROTECTION TAPE
The SPV TVP Series are special manufactured air-bubble free surface protection tapes
transparent PE film coated with a pressure sensitive pure acrylic adhesive
http://www.nittousa.com/files/ProductDe ... &CatId=277

TRANSPARENT PE TAPE
Nitto PE 3415 is a premium grade, transparent PE tape coated with an acrylic based pressure sensitive adhesive. This non-halogen tape has an excellent chemical as well as UV resistance which makes PE 3415 a suitable product for general purpose.
http://www.nittousa.com/files/ProductDe ... spx?PId=11

MiiCraft, How to replaceTeflon Module
http://www.youtube.com/watch?v=mBcZpCEXT1E#t=18

Please note that I’m running on PE LD film and it works great, maybe better than original film on small details.
http://www.miicraft.com/forums/topic/ho ... -the-film/
Attachments
ScreenHunter_590 May. 07 00.34.jpg
ScreenHunter_590 May. 07 00.34.jpg (15.16 KiB) Viewed 9213 times
ScreenHunter_589 May. 07 00.01.jpg

User avatar
@A2
Posts: 51
Joined: Wed Apr 23, 2014 7:58 pm

Re: Acetat membrane with a resin film recoater, eliminates v

Postby @A2 » Wed May 07, 2014 3:49 pm

@A2 wrote:Dizingof 4 Jan 2013
Funny thing, got Bank mail wrapped with nano translucent sheet. Immediately tested it on a UV resin.. Peels amazingly fast & clean
https://twitter.com/dizingof/status/287188155721990144

I think the translucent sheet is acetate.


Looks like the clear window in envelops is mylar.
https://answers.yahoo.com/question/inde ... 909AARrIjN

BoPET (Biaxially-oriented polyethylene terephthalate) is a polyester film made from stretched polyethylene terephthalate (PET) and is used for its high tensile strength, chemical and dimensional stability, transparency, reflectivity, gas and aroma barrier properties, and electrical insulation.

biaxially oriented PET film has excellent clarity, despite its semicrystalline structure.
https://en.wikipedia.org/wiki/Mylar

Mylar is often used to generically refer to polyester film.

Has any one tried Mylar tape as a release?