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This is a plastic extruder that's capable of extruding a lot of plastic. It's a work in progress.

here the entire Fusion360 file that has every component of this build.

http://a360.co/1PdOj53N

Here's the current BOM

https://docs.google.com/spreadsheets/d/1JUMiHip88w...

Not included in the BOM are custom parts that you'll need to fabricate by CNC milling and 3D printing parts.

The basic idea is to take plastic pellets and melt it down and extrude it through a custom shaped die. In order to do this, I used a 1" wood auger driven by a stepper motor to push material forward and heat bands to heat the material. There is also a thermistor to measure the temperature and a PID to close the loop and turn the heat bands on and off as needed. At the tip of the extruder is a mist cooling system that uses compressed air to draw water to the tip and sprays a mist onto the hot plastic so it cools down quickly. To control the flow of plastic, there's a potentiometer, finger trigger, and foot pedal to accommodate different extruding styles.

The current design of the hopper holds approximately 1.5lb of plastic pellets. This could easily be extended with a 1" tube to a larger hopper hosted elsewhere.

Step 1: CNC Mill Shaft Collars and Spider Coupling Housing

These parts make the bulk of the custom parts needed for the extruder. Two extra-wide shaft collars for 1.125" OD tubing to hold the different tubes in place.

The spider coupling housing is used to hold one end of the tube agains the stepper motor while housing the spider coupling (which provides just enough slop to prevent the auger from jamming)

Almost all the components in this build are held together with M6 screws (for easy disassembly and reassembly)

<p>Nice work!</p><p>Can we use this machine for extrude Rubber beading or Is there any way to upgrade this machine for rubber :)</p><p>Thanks</p>
<p>amazing work, man!</p><p>I'd like to ask, how do you open this .f3z file? Am I right trying to open it in Fusion360?</p>
<p>yup!</p>
<p>unfortunately i've got stuck with this error message. do you know any way to get rid of it? fusion360 does not open the model because of it :(</p>
<p>I got it to work by doing this: </p><p>1. Follow the link</p><p>2. Download&gt;Fustion 360 Archive</p><p>3. Enter email address, follow link in email to download file.</p><p>4. Open fusion, open a project folder in the Data Panel, click Upload</p><p>5. drag the fusion archive folder you just downloaded onto the upload window.</p>
<p>Once built, all someone would need at this point to make filaments is use a multi port die (drilled holes in sizes needed)actual holes size will be dependent on vertical or horizontal setup of the extruder. Then simply extrude into a water bath (tub of water would work). simple really. Just a suggestion to the maker. Cut some cross channels in the tip of your screw(auger)flight. I am assuming your getting a surging in material out the die every time the flight of the auger rotates by. All the pressure needed to extrude should be supplied at the first half (feed section) of your screw(auger). the tip end of the auger/screw should be used for mixing up the flow patterns of your materials.</p><p>Amazing job BTW!</p><p>I would like to offer making one of these with some of my professional experience in extrusion in exchange for a high quality 3D printer for a beginner in 3Der like *me. Any takers? Piece Out!</p>
<p>DanM6, exposure to water, or even high humidity, is a major no-no for 3D printer filament. Both PLA and ABS absorb moisture/water. When heated in the 3D printer's extruder, the water forms steam bubbles. This destroys the print. There's a reason people who use FDM 3D printers store their filament in air-tight containers with packets of desiccant. </p><p>If you plan to use this device to make 3D printer filament, you need to modify it. First, the filament extrusion size needs to match your printer (usually 1.75mm or 3mm). Printers do not use 1/2&quot; diameter filament. &quot;Surging in material&quot; does not matter. The filament diameter does not change.</p><p>Second, you need to cool your filament with dry air if you ever want to have a successful 3D print from it.</p><p>Finally, if you want a good 3D printer, check out reprap.org. They list designs and details on a wide range of 3D printers. Many of them are open source with links on GitHub or Thingiverse or available in kits. It will help you decide which model is right for you to dip your toes in the pool (NOT YOUR FILAMENT!!!). You can also find several plans for printers here on Instructables.</p>
<p>What do you use this for?</p>
<p>:) If you ask, you don't need it. :) So sorry, really. :) </p><p>If you use a 3d printer, this can make the filament for a printer. You can also recycle plastic by grinding bad prints and other plastic into small, BB sized pellets and running it through the extruder. </p><p>You can also use it to make the parts for the extruder....but then again, :) you need a printer and FILAMENT to make the extruder.... :) </p><p>I'm stopping now. </p><p>Outstanding build!</p>
<p>LarryK4, I don't think so. Every 3D printer I have built, used, or looked at plans for uses either 3mm (less common) or 1.75mm filament. This extruder produces 1/2&quot; (12.7mm) filament. In addition, moisture in 3D printing filament causes MASSIVE problems in printing. It produces steam bubbles in your printer's print head/extruder. Both PLA and ABS absorb moisture on their own. This means a misting system to cool the product is a no-no.</p><p>This is a good jumping off point to create a 3D printer filament extruder, but it would need some major mods to the extrusion nozzle, the speed of the stepper motor, and a completely different cooling system.</p>
<p>Once built, all someone would need at this point to make filaments is use a multi port die (drilled holes in sizes needed)actual holes size will be dependent on vertical or horizontal setup of the extruder. Then simply extrude into a water bath (tub of water would work). simple really. Just a suggestion to the maker. Cut some cross channels in the tip of your screw(auger)flight. I am assuming your getting a surging in material out the die every time the flight of the auger rotates by. All the pressure needed to extrude should be supplied at the first half (feed section) of your screw(auger). the tip end of the auger/screw should be used for mixing up the flow patterns of your materials. </p><p>Amazing job BTW! </p><p>I would like to offer making one of these with some of my professional experience in extrusion in exchange for a high quality 3D printer for a beginner in 3Der like *me. Any takers? Piece Out! </p>
<p>Wow this is really cool! An extruder like that could be very cool for 3D printing furniture. If you build a big enough 3D printer that is :D</p>
It looks like the Ghostbusters and Portal had a love child. I love it. Very innovative
<p>Hi, chewee!</p><p>Thanks for sharing this project, it is a great one for lab-scale developments.</p><p>I couldn't find the file on a360 &iquest;have you move it away from that site?</p><p>Best regards</p>
<p>If you attach this to a large robotic arm or CNC setup, you could print large plastic parts. I could see this as being useful to make replacement or custom auto/motorcycle body parts. As for making filament for a home printer, I think you are just asking for trouble. It would be very hard to get a good quality filament from a home spun design. Given how inexpensive filament is, you would have to be using a LOT to make the time investment worthwhile. </p>
<p>could this be used to inyect the plastic into a mold. </p>
yes. but the mold would have to be pretty small. It doesn't have enough pressure to fill large molds.<br>
<p>Awesome build. Not that I'm planning on injection molding anything super large but what would be needed to increase the pressure? Something more like a hydraulic piston?</p>
<p>Actually, all you need is leverage. There are a few designs out there for small-scale injection molding machines based on the heater for an electric oven providing heat to a metal cylinder with a piston in it. The top of the cylinder is usually pressed down with a long lever, no hydraulics involved. Most of them look like mechanical automobile jacks when they're completed.</p><p>This one is pretty typical:</p><p>http://rick.sparber.org/Articles/gpi.pdf</p><p>The approach is crude, but it works -- with the caveat that really complex parts can be difficult to make. Then again, machining the mold gets difficult in such situations as well.<br><br>One thing I've wanted to try myself (since I'm just putting the finishing touches on a homemade Prusa Version 2 3D printer would be to 3D print an object, make a sand casting of it, and then use that as the &quot;positive&quot; for making an injection mold.</p>
<p>That's what I'm shooting for, I've got the 3D printer and they make filament that will melt cleanly out of a mold. One day... but this is a start!</p>
<p>This is brilliant! </p>

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