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Need a very flexible part printed

Posted by tmccar 
Need a very flexible part printed
June 18, 2019 06:40PM
I have a part that is a mask that goes over the nose. I would like to print it in a material that is as close to the manufactured material - a silicone, rubbery material.
Is this achievable with a reprap-style printer, and what is the best material?
VDX
Re: Need a very flexible part printed
June 19, 2019 03:07AM
... you can change the extruder for a dispenser and print with silicone ...

*** EDIT ***

- here a sample, printed with air-dryed silicone:



Edited 1 time(s). Last edit at 06/19/2019 03:11AM by VDX.


Viktor
--------
Aufruf zum Projekt "Müll-freie Meere" - [reprap.org]
Call for the project "garbage-free seas" - [reprap.org]
Re: Need a very flexible part printed
June 19, 2019 04:50AM
Very interesting, could you show us the dispenser? What type of silicone do you use and where do you get it? Do you have to use one time use kits or are you able to reseal the dispenser for later use?


--
Kind regards
Imqqmi

NFAN CoreXY printer:
[reprap.org]
Re: Need a very flexible part printed
June 19, 2019 07:12AM
Wouldn't it be possible to use the original part to make a mold instead? I think it's easier this way since it sounds like you have the original part as well that needs to be replaced. That said, you could also 3D-print a mold by using the mold option in Cura and put silicone in that part.

Edited 1 time(s). Last edit at 06/19/2019 07:12AM by Ohmarinus.


http://www.marinusdebeer.nl/
VDX
Re: Need a very flexible part printed
June 19, 2019 09:08AM
... this was made with a comercial motor-driven dispenser while testing for a project (most actual infos under NDA).

But you can see one of my older DIY-prototypes and different cartoushes here:

[reprap.org]


Viktor
--------
Aufruf zum Projekt "Müll-freie Meere" - [reprap.org]
Call for the project "garbage-free seas" - [reprap.org]
VDX
Re: Need a very flexible part printed
June 19, 2019 09:15AM
... here some videos with another jetter-dispenser, printing and UV-curing UV-glue:

[vimeo.com]
[vimeo.com]
[vimeo.com]

The UV-glue was a common comercial type from Delo ... the blue silicone was a standard "sanitarian" type with some dye added ...

Edited 1 time(s). Last edit at 06/19/2019 09:20AM by VDX.


Viktor
--------
Aufruf zum Projekt "Müll-freie Meere" - [reprap.org]
Call for the project "garbage-free seas" - [reprap.org]
Re: Need a very flexible part printed
June 19, 2019 10:39AM
I designed and printed a lot of molds for silicon casting. It is pretty easy to do. I also print a lot of very soft Filaments, none of which is close to silicon in softness, i doubt you will find anything that will work for you. Flexible filament is actually a very nice material for molds, but not always easy to print.


[www.bonkers.de]
[merlin-hotend.de]
[www.hackerspace-ffm.de]
Re: Need a very flexible part printed
June 19, 2019 12:07PM
You can print very soft filament like Ninaflex, shore hardness 82-85. It is very soft, but not silicone soft, and you need a direct-drive extruder and SLOW print rates.
As someone mentioned, CURA has a "mold" setting where it will take the model and invert it to a mold that you can cast silicone in. That latter is a cheap experiment.

DLC


Kits: He3D K200 Kossel, Folgertech Kossel 2020 upgraded E3Dv6, Anet A8 upgraded E3Dv6, Tevo Tarantula enhanced parts and dual-head
Scratch: Large bed Cartesian, Linear slide Delta, Maker-Beam XL Micro Delta
Re: Need a very flexible part printed
June 19, 2019 02:00PM
I've been keeping an eye out for developments like this for a while, the ability to print things in silicone would be extremely helpful for automotive applications. The temperature stability of silicone makes it suitable for engine compartment applications or even interior parts that PLA and even ABS might have trouble with. Temperatures in strong sunlight on the dashboard can get amazingly high, and of course in winter they can also get very low. Winter temperature swings (-30°C overnight parked, to +20°C when the car warms up to be habitable inside has done some terrible things to some of my 3D printed parts. It can get even worse for things under the hood of the car, which also has to deal with water, and sometimes oil and grease.

So yeah, the ability to print in silicone would be valuable to me. I'm kind of hoping that something becomes more widely available int he RepRap community soon


MBot3D Printer
MakerBot clone Kit from Amazon
Added heated bed.

Leadscrew self-built printer (in progress)
Duet Wifi, Precision Piezo parts
VDX
Re: Need a very flexible part printed
June 19, 2019 02:28PM
... were you been aware of the [email protected] project, which started short after RepRap in 2006?

They focussed on silicone-dispensers ...


Viktor
--------
Aufruf zum Projekt "Müll-freie Meere" - [reprap.org]
Call for the project "garbage-free seas" - [reprap.org]
Re: Need a very flexible part printed
June 19, 2019 03:02PM
No, I was not.

Looks like I've got my evening's reading ahead to do.


MBot3D Printer
MakerBot clone Kit from Amazon
Added heated bed.

Leadscrew self-built printer (in progress)
Duet Wifi, Precision Piezo parts
Re: Need a very flexible part printed
June 19, 2019 05:06PM
60ml Syringe Extruder for Liquid Deposition Modeling

[www.thingiverse.com]

Bowden Syringe Extruder

[www.thingiverse.com]

confused smiley
Re: Need a very flexible part printed
June 21, 2019 05:51AM
Quote
VDX
... you can change the extruder for a dispenser and print with silicone ...

*** EDIT ***

- here a sample, printed with air-dryed silicone:

[attachment 111715 Siliko-3D-Druck-1.jpg] [attachment 111716 Siliko-3D-Druck-2.jpg]

ou used?
That's interesting VDX - could you share what extruder (and filament) y
VDX
Re: Need a very flexible part printed
June 21, 2019 06:32AM
... this was common sanitary silicone (normally white, with some blue dye to get our "company-blue"), printed with a motor-driven syringe -- see the other links for some types.

I'm testing and developing with all sorts of "additive tools" (and subtractive too), so have different motor- or pressed air driven syringe-dispensers ... or jetter's ... or totally different (some unique, self developed) ...

This is all (together with my laser-related work) collecting bits'n'bytes for pacing my "personal agenda" -- "unlimited multi-material fabbing at home" ...

And no "dimensional" limits too:
- did some serious work and development in micro-/nanotech-projects with dimensional accuracies down to some nanometers ...
- and if you read through my signature -- ideas and plans for fabbing "mega-structures" with sizes of many kilometres cool smiley


Viktor
--------
Aufruf zum Projekt "Müll-freie Meere" - [reprap.org]
Call for the project "garbage-free seas" - [reprap.org]
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