SoliForum - 3D Printing Community — Polymer Extrusion - A Brief Tutorial.

Re: Polymer Extrusion - A Brief Tutorial.

null@example.com (angel80) — Sun, 05 Jul 2015 02:40:03 +0000

I was going to scan the page that listed all the plastic's, but my scanner has carked it. When my library opens on Monday (ACMT) I will scan & upload the page then.

Re: Polymer Extrusion - A Brief Tutorial.

null@example.com (Tin Falcon) — Sun, 05 Jul 2015 00:14:59 +0000

HIPS stands for high impact polystyrene, not polyethylene.

Sorry need to be more careful and read what I am looking at . was a long day yesterday but no excuse to post misinformation.
thanks for the correction
Tin .

Re: Polymer Extrusion - A Brief Tutorial.

null@example.com (angel80) — Sat, 04 Jul 2015 06:56:04 +0000

So the PS is the polystyrene plastic I listed in my above post? In the manual that came with the kits there is about 3 kanji then PS. If I can I will post a pic when I get home.

Re: Polymer Extrusion - A Brief Tutorial.

null@example.com (elmoret) — Sat, 04 Jul 2015 06:07:41 +0000

angel80 wrote:

Sorry if this has been asked before, Why is polystyrene plastic useless for 3d printing?

Thermal expansion coefficient.

Re: Polymer Extrusion - A Brief Tutorial.

null@example.com (elmoret) — Sat, 04 Jul 2015 06:07:03 +0000

Tin Falcon wrote:

ABS is one of the mere common plastics used for 3d filament and the filastruder will handle it fine you will likely have to grind or chop it first.
The PE may work as some folks use HIPS High Impact Polyethylene for printing.
Polystyrene imho useless. for 3d printing .
Hopefully our resident expert on the filastruder will chime in and help you.
Tin

HIPS stands for high impact polystyrene, not polyethylene.

Re: Polymer Extrusion - A Brief Tutorial.

null@example.com (angel80) — Sat, 04 Jul 2015 05:26:50 +0000

Sorry if this has been asked before, Why is polystyrene plastic useless for 3d printing?

Re: Polymer Extrusion - A Brief Tutorial.

null@example.com (Tin Falcon) — Sat, 04 Jul 2015 01:53:18 +0000

ABS is one of the mere common plastics used for 3d filament and the filastruder will handle it fine you will likely have to grind or chop it first.
The PE may work as some folks use HIPS High Impact Polyethylene for printing.
Polystyrene imho useless. for 3d printing .
Hopefully our resident expert on the filastruder will chime in and help you.
Tin

Re: Polymer Extrusion - A Brief Tutorial.

null@example.com (angel80) — Fri, 03 Jul 2015 04:13:16 +0000

G'day all. I am wondering if the plastic used in model kits can be recycled into filament with the filastruder? The model kits I am talking about are the ones made by kotobukiya. the only info i can read on the plastic is PS, ABS & PE. I would rather recycle the empty spines then put them in landfill. I am also buying a magazine called 3D create and print and with each issue I get a few parts for a Vector 3 3d printer. If I can recycle the plastics I mentioned above then I will be getting a filastruder. Thanks in advance for all your help.

Re: Polymer Extrusion - A Brief Tutorial.

null@example.com (redbarret) — Wed, 11 Feb 2015 11:25:10 +0000

elmoret wrote:

The feedscrew used in the Filastruder looks like this:
A real extruder screw looks something like this:

I just thought of something related to glow-in-the-dark filaments.
Since those are just PLA mixed with glow powder, which are tiny crystal particles (of mainly strontium aluminate or zinc sulfate) that lose their phosphorescence if the crystal structure is destroyed, for example from grinding, does that mean the Filastruder with its feedscrew design will likely produce better glowing filaments than commercial ones made with a commercial extruder screw like in the second image, because the latter will grind some of the glow powder?

Re: Polymer Extrusion - A Brief Tutorial.

null@example.com (wardjr) — Tue, 30 Sep 2014 00:21:35 +0000

They come with instructions, sweet!

Re: Polymer Extrusion - A Brief Tutorial.

null@example.com (elmoret) — Mon, 29 Sep 2014 20:42:57 +0000

Q1: It depends, it depends, and it depends.

Q2: The optimal distance is the distance that occurs when assembling it according to the instructions. It is not something you should be concerned with if you have assembled it per the instructions.

Re: Polymer Extrusion - A Brief Tutorial.

null@example.com (ajp48514) — Mon, 29 Sep 2014 20:27:15 +0000

Hi,I have two Questions,
Q1:What is the ideal extrusion temperatures for the following polymers:
1:ABS
2:PLA
3:PCL

Q2:In the filastruder what should be the distance between the tip of the auger bit and the die?

Re: Polymer Extrusion - A Brief Tutorial.

null@example.com (eagleapex) — Thu, 21 Nov 2013 16:58:35 +0000

Thanks for this post. It's the first I could find that detailed switching nozzles.

Re: Polymer Extrusion - A Brief Tutorial.

null@example.com (elmoret) — Tue, 17 Sep 2013 20:06:52 +0000

A taper means it can't be done on a manual mill anymore, if it is a true curved taper. I have some ideas in mind, for the future but this works well for now.

Where have you seen customization of the nozzle? There should be no clogging - you should not be introducing debris into the material.

As for making your own screw, I doubt very much it'd be worth the hassle. On top of that, I doubt the RPM can mill tool steel...if it ever ships.

Re: Polymer Extrusion - A Brief Tutorial.

null@example.com (Ralphxyz) — Tue, 17 Sep 2013 19:59:34 +0000

"I'm not sure what you're getting at with the nozzle. It is of course possible to machine a tapered transition, but that would add a more expensive machining feature to the nozzle. "

Well you are currently paying for the facing and the asterik groove machining on the back face
I doubt a taper would add much.

I have seem where others have customized the nozzle with tapers to help avoid clogging.

Now as far as the extruder screws I can see where the taper at the end would increase the pressure and shear. Well I guess that moves my getting a lath or a forth dimension for my RPM up on the list.

Ralph