Homemade Plastic Injection Machine Works With 3D Printed Molds | INJEKTO 2.0
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- Опубликовано: 2 июн 2022
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INJEKTO 2.0 is finally here! After inventing our original desktop plastic injection machine, we promised you all an improved version that can be used with 3D printed molds, and we succeeded. NO MORE NEED FOR OUR DIY CNC MACHINE!
This homemade machine works great in tandem with SHREDII, our DIY plastic recycling machine, to turn old 3D prints and other plastic waste into pellets that can then be injected into 3D printed molds.
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Check out some of our latest machine builds:
We built a 3D Printer Scrap Recycling Machine (SHREDII 1.0)
• DIY Shredder Recycles ...
We built a Tiny Injection Molding Machine (INJEKTO 1.0)
• How We Made A TINY Inj...
We built a Wire EDM
• How We Made A Wire EDM...
We built a CNC Machine (DIY CNC)
• Homemade CNC Machine! ...
We built a Plastic Injection Machine
• Homemade Plastic Injec...
We built an EDM Sinker
• Homemade EDM Sinker
We built a CNC Router
• HOMEMADE CNC ROUTER.
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MAKE A Mandalorian iron INGOT MOLD AND USES THE SAME COLOR PLASTIC IN IT TO MAKE Mandalorian iron INGOT
Ey dude, the game is done, nice nice nice
what a time to be alive. affordable 3d printers, CNC routers, and now I witnessed someone injection molding in a somewhat amateur setting. fantastic
It sure is a great time to be alive! Do you have a homeshop?
On the note of Shredded Bottles, I don’t know if you know this already, so sorry in advance if I’m “preaching to the choir”, but the PET Plastic they are made of goes through Hydrolysis if even a small bit of water (vapor) is left in the flakes. So Drying the flakes and keeping then dry will be key. Beat of luck in that, I’m excited to see the results !
Nice improvements.
If I can suggest.
1) Use phenolic materials as heat blocks. They are cheap, and easy to machine to shape.
2) Your ram is tight tolerance, great. However, if its expansion rate does not match the heat column, you can get it to jam. Normally in injection molding, to reduce leakage. You add small machine ribs or groves to the piston or ram. They will act as material collectors and reduce leakage without having to use tight tolerances. Similar to this design found in Injection Molder Valve gate assemblies. Or on shooting pots.
3) Always use heat paste for the installation of the heater cartridge's, reduces the chance of a hot spot and its a failure point. Same for the solid state relays, they should always be installed with heat paste on the back.
4) How are you mitigating the chances of a runaway heater control or the solid state relays? Both can fail in a close state. Does the E-stop control kill voltage to the heaters as well? Do you have a central E-stop?
5) Would always recommend to have a source of water nearby as you run the equipment. A simple bucket or pail filled with water is better than nothing. If plastic shoots out and gets on bare skin, the natural reflex is to grab the material with the other hand. And now you are burned twice if not wearing gloves. Throwing your hand or wrist into a bucket of water is far safer and minimize the burn damage.
Whish I had one of those machine 10+ years ago, would have made my life easier in prototyping.
These are really great suggestions. I agree with all of them. Thanks, Dave
My favorite part about the community is the incredible design enhancement comments below. I was an injection molding foreman years ago followed by mold setting technician and later did some extrusion blow molding as well. Years later, two years ago, bought my first 3D printer. Right now I'm looking at a desktop cnc, laser and frankly, adding the injecto would give me four methods of producing parts for robotic design. The four together should provide the variety needed for creating most any type of part necessary.
Great work guys. Love the Injecto! Love all the great feedback for improvements!
Love the idea and build quality of the injecto 2.0. Just a thought, it might be a potential idea to add a micro controller to make operation easier and potentially automated. A user interface and automatic volume injection amount would be ideal so there is no guess and check on an expensive mold. Great work so far!
Really love this design. This would be great for anyone trying to build a microfactory in their garage!
This is an awesome design! I'd recommend a floating joint from that push rod for the plastic and the crossbar that links the cylinders. Any misalignment of the rod and the cylinder that holds the plastic will destroy the tolerance you have on those 2 parts. I work as an automation engineer and the biggest failure point for pneumatic cylinders is misalignment. I think your cylinders will be fine (unless they move at different times). I think its a small change with big benefits. Its also very easy to judge a design from the outside looking in. Non designers love to criticize and say "this design is terrible its the worst thing I've ever seen" so this is not one of those comments.
Overall GREAT job but that would be a small change that I would make. There are probably a million right and wrong ways to do this but overall you did a bang up job!
The stiffer crossbar is a good upgrade, based on experience, and looks promising. Another solution, though it requires considrably more vertical space and has issues related to rod stiffness (that can be overcome by using less slender rods) is to drive the plunger with a single cylinder. This machine is very similar to the way thermoplastic injection molding machines were built (for a very short time) prior to the invention of the reciprocating screw, and the good news is that most commodity thermoplastic resins (like polypropylene) have a pretty wide processing window regarding melt temperatures... and low melt index resins, such as those formulated for extrusion, tend to be more forgiving than high melt index ones.
First things to go will be the piston and barrel and cartridge heaters aren't always easy to replace, so there'll be a market for spare parts.
Some Ideas for Version 3.0
-Powder Coating the Aluminum will result in a super high quality look
- A Blast shield that you can lower and raise in case the mold breaks to protect your face.
- Measurement lines on the rod on which you adjust the limit switch. So that you know how much Plastic will be extruded.
- A Fan that turns on when things get too hot or you can turn on by yourself so you can cool down the maschine after extensive use
And for the molds:
-Ive seen people using aluminium outer rims in which you place in the resin molds. So that you dont have to print the molds extremly thick.
-Aluminium will be better to clamp or screw together than resin since the thread are stronger. So you can add holes with threads on the aluminium outer rim
Great ideas. Thank you. We were trying to eliminate the need for CNC machining and hence eliminate the aluminum, but that is a good idea. Cheers, Dave
@@ActionBOX I remember seeing these aluminium mould 'blanks' being sold somewhere, but don't remember where. I think TheCrafsMan used them.
@@ActionBOX Have to admit Your channel as well as Your work has come a long way. Have been watching you since the EDM wire cutter machine.
I had a request/suggestion to make...
Could you please test these and post a video
1. using a 3D printed FDM Pattern to create Plaster of Paris Mould (preferably reinforced with hay for strength) and lubricate the internals of Mould with oil to prevent sticking of plastic with POP.
2. Instead of POP using pottery clay around the FDM 3D printed pattern and then cook it to get the mould.
With the test Also find answers to:
1. Do these kind of moulds do the job?
2. How many parts/injections do these semi permanent(yes that's the objective) moulds can take?
3. Do they have adhesion issues with the parts?
4. Do they provide necessary finish to the parts?
5. How economical/costly are they compared to Aluminium or Resin printed Moulds.
Excellent work guys. Glad to see the 3D printed moulds solved the cost issue!
This is incredible, literally was just talking with my buddy about injection molding our project and how expensive it was, and then boom found your page. VERY impressive guys!
I work in an injection molding factory and I can ensure you you did a great job. Bravo!!!
This is definitely great! I also was surprised to see how the resin prints did withstand both temperature and pressure...
About the possibility of plastic ejection : it would be neat to have a polycarbonate shield in front of the mold, perhaps a swiveling one, or snapping on one?
Anyways, the 2.0 kit really ties up the loose ends from the 1.0.
this! getting molten plastic sprayed in your face is no joke, and a clear plastic shield is enough to stop it.
@@gydo1942 I don't know if you are trying to be sarcastic here, but a 5mm sheet of polycarbonate will definitely stop a blob of hot plastic. Polycarbonate is used to make riot police shields, and also bulletproof clear protection...
If not, sorry, i read this as sarcastic while it was not.
@@AudreyRobinel I was absolutely serious. Safety first!
Been waiting for it, machines are made so professionally that it's probably best on RUclips
Something to consider for a future version if you're worried about the heated chamber overheating the assembly, you can use thermally insulating mica sheets. We used these at my previous job to insulate the tooling from heater blocks for hot plate plastic welding machines.I would source them from somewhere other than McMaster Carr since their sheets tended to break down after only a few hours of tool use.
As I said on your shreddy video, this is an amazing project and I am all for having hobbyist ways to recycle plastic waste. When I have the disposable income for tools again I'll definitely look into this.
as someone who's worked as a mold tool machinist and a press operator i approve.
those were my 2 most stressful jobs and im glad i got out of them.
it would be more fun to do this at home where you control everything and dont have past due deadlines and can take bathroom breaks as often as you need to.
I have been anxiously awaiting for this! Well done guys! You have solved nearly all the shortcomings I noticed about the previous design. :)
Great to see this mold machine will fit on someone's desk and perform what is designed for❤️
Amazing job guys!! It would be awesome to see some videos of your engineering design process. Maybe like a behind the scenes CAD and CAM session
i would love to see cad/cam stuff also!
That cross bar is THICC. Love it.
I like this.
I was involved with a shop that started off using the resin cured molds as inserts into MUD units for prototypes (master unit dies). CNC aluminum was good for lower volume but is significantly higher cost in mold size. we were working to lower that cost to entry industrially. The primary limiter was the heat history of the plastic mold. though the resin cured was better than standard filament 3d prints, the heat would soak into the outer sides, usually blowing out the parting line, as it's harder to scrub the heat in that region; where there is little active cooling.
Adding cooling lines in the prints didnt seem to help much as a trade off. Wall thickness of the resin mold had to be near double the part thickness to stand up to the injection pressure. (which was often 10K -20K PSI on smaller machines)
in addition, the more heating and cooling cycles would make the acryllic, or composite resins degrade over time, even below the plastic transition temperature. Some compatabillity issues were found between resins near their transition temperature and the mold surface temperature.
Painting an SLA with silicone to make a negative, and then casting a surface with an epoxy is allright for several swapp-able units; but in short order, you want to switch out to aluminum for prototyping. A thin skin of foil, or composite pouring resins (graphene, carbon black, copper flake) helped with heat scrubbing, but Resin casting and time cost adds up relatively quickly. Tolerancing on casting is good though. Shut off on parting lines were an issue (again, heat buildup) at small lot runs when you wanted to get up to production speed.
Some solenoids in the bottom of the frame would be ideal to help with the ejection of parts -- but that's more of a bottleneck if you have fast enough cycles to make the heat scrubbing an issue.
I like the bigger cyllinders, Often the injection speed is the limiter with the shot size. Venting and part geometry relative to the sprue helps with flow to reach further in the part shape. All kinds of fancy gating can be used to sidestep the machine limitations. The trade off is the more runner you add, the less part you get for your shot size. high end hot runners and valve gates are theoretically a choice; but I suspect part orientation in the mold and shortening the runner with several gates to fill will optimize given the low-cost-protoype constraints. There is a fair bit more done in the DFM for injection molding to make a part and a machine compatible. if your max shot size is 27 grammes, that's a good size -- but I'd bet there are limitations keeping you between 22-25. Would be willing to discuss more if desired.
I would be interested to see some ideas for how to make this more durable. The next step up in price from a unit like this is a 10K screw driven desktop molding machine -- so this is super accessable; right around the cost of a basic 3d printer.
if you can make polyCarbonate accessable to the hobbyist without using aluminum with a benchtop press -- that's a huge barrier to entry for 3-d printing. Injection molded part strength is better than cast, SLA or FDM for prototyping too.
Very exciting project, great execution you guys.
I really enjoyed reading this. Thank you for sharing 😃
This looks simple and robust and I really like what you’ve done here. I have been looking for a system like this. Could you post some additional videos of the machine producing more detailed parts? I’m curious as to how it might perform when producing a 1/12 scale action figure head, for example. Great job!
Will do in a follow video. Cheers
Love how you guys showed the first assembly method wasn't the most optimum one and then gave a better one! 👍👍👍
Thanks, we appreciate it 😃
I think it would be nice to have an mesurement scale with the stop plate. So that you could fill the mold more acurate.
You could do this with an ruler behind the rod or if the tollerances alow it, laser engrave it into the rod.
You can calculate the volume of the empty mold to know howmuch plastic is needed. And calculate how much the injecter should move to inject this volume.
wow this could be revolutionary in small manufacturing! Really love this idea, hope to see more!
The youtube algorithm recommended your first version to me today, was incredibly excited to see that the follow up is already out :D
Brilliant! At first I just thought your videos were average, but you have really started to show how great you are
Token comment for the algorithm- far cool dude!
love seeing builds like these. I hope to be able to make things like this later on.
I really like the recycling mindset in your videos lately.
Amazing product, I have been 3d printing for some time but this would enhance certain projects, great job guys :)
Looking forward to the bottle shredding results in the next vid! Nice work on all the progress you're making, keep it up!
Omg you guys actually did it! I'll have to grab one of these ASAP
Injecto is truly one of the last components in a home production line that we've been missing. Wish I could afford one for my own garage... It'd basically bring me to having almost nothing I couldn't fabricate.
Yup, it's quite an awesome machine!
Would love to have one of these, I was making pinball mods with 3d resin but found that it’s really not suitable in certain circumstances, keep up the great work.
Great design. I was amazed watching your product working so well. Your design is sturdy and still small. I would be very excited to have one and test it out for my projects. I was already excited about version 1 but this is much better. Great work guys!!
👋 HI, IS IT POSSIBLE TO DO TWO SHOTS FOR LARGER VOLUME PARTS? IS THIS SOMETHING COMMONLY DONE? THANK YOU 🙏
I’m not sure to be honest. That’s an interesting question.
@@ActionBOX I second that. Hopefully in the future you will produce 2k injection capabilities for this machine. I’d much rather buy domestic than Chinese alternatives. Unfortunately the options are pretty much NIL.
It could be done with an over mold. You’d mold the first piece, then insert it into a separate mold to be injected over with another shot. We did this where I used to work. Caution must be taken so that the first shot does not warp when cooling, because any warp could affect the second shot.
You could potentially add a polycarbonate sneeze guard to protect the user's face.
And/or two vertical side shields that stick out to protect the hands/wrists.
Nothing beats injection moulding, 3d printers are slow and not up to scratch for high amounts of detail.
Agreed
13:35 You should make an transparent acrylic door in the front for protection
Isn't is gonna melt?
yaa i would recommend the same (Safety first 🫡)
@@Hajdew A few centimeters apart is enough
That is a great idea. Thanks for sharing 😃
What a fantastic job you guys just did 👍👍
You are awesome. The fact I can plop down on my couch and search for “DIY injection mold” and find you spoon feeding the whole project to me and 437,000 other folk 😱🏴☠👾
We do it for the fans :) Glad you found it helpful!
This Shredii and injekto series has me on the edge of my seat like the mandalorian series! Great job guys! Excited to see the next video.
This would be an absolute game changer.
I wish I had one of these. You did an amazing job engineering them. I hope to own one, one day! Keep the cool stuff coming! 😃👍
Thank you! You've got a neat channel! We do sell kits for this machine on our website. You should check it out: actionbox.ca/products/injekto-2
This looks like what I've been looking for!
this looks amazing
there is not a lot of things I would recommend for this, I think the only thing would be glass fiber tape on the top and bottom it's a high temp tape that should make the injection chamber both more snug and more thermally isolated from the frame
Nice, I’ll need this in the future
Not an expert, but I'm a plastic injection molding technician at my job.
Just a bit of helpful advice, when processing resin for injection molding you want most of the heat generated to come from friction. Part of that friction is created as the barrel screw rotates while building the charge (shot). Higher temp resins require a lower torque compared to lower temp resins (higher being over ~425°F). Also, industrial equipment incorporates a check valve into the end of the screw near the head to help accommodate the pressures that are generated as a result of this action.
With all of that out of the way, absolutely fantastic work! I'd love to have one of these at home to play around with some day.
Thank you for your input. The machine you are describing is a more complex technology that uses a reciprocating screw. Our equipment is less sophisticated, and does not require the check valve, although producing the heat via friction would be nice if you could think of a way to do it cheaply. Cheers.
@@ActionBOX maybe machine flights into the plunger to create some sort of compromise between a plunger and screw and just attach a small geared motor to it. You wouldn't need much more than ~100rpm on average with some slight variability for what you're going to be injecting usually. Just have it rotate as it builds the charge from the bottom point up to capacity. Of course you'll need to have the proper tolerances. The biggest issue with building the shot this way without a checkvalve is you might end up with the side effects of gas in your molded pieces.
Just spitballing, but I believe with a small geared DC motor attached and aiding the charge buildup at low rpm, you could gain consistency and increased lifespan for fairly cheap and fairly easily.
damn, you weren't kidding when you said it was better than Injekto 1.0, this is really really refined, Good job guys and amazing video 😄👍.
Will now be waiting for the shredii 2.0 video after that massive cliff hanger 😂😂
Hhaha, thanks Divyansh 😃. I’m glad you enjoy our content, and I appreciate your comment. Cheers, Dave
Holy moly, imagine winning this beast :D id cry!
You guys are really Top Shelf …. ⭐️⭐️⭐️⭐️⭐️ content, concise presentation, sound engineering practice and engineering economics (safety, function, cost) ….. 👍👍😎😎💪💪
Fantastic!! Great job guys!!
Very cool system and some beautiful machining results.
Thank you 😃
You guys are doing a fantastic job at R and D in order to find out what works best, but most of all what you think the customers would love.
Thanks 😊
Great video, looking forward to what comes next.
These are some great improvements from the first version, it's a really well polished machine now. I think the biggest area of improvement that could be looked at now is the injection volume - The adjustable limit switch seems to work fine but it's not very easy to set to the correct amount when changing molds without some trial and error.
I think the first improvement in this area could be to mount some calipers to the stop in order to make it easily measurable. A further option would be to mount a linear scale or a "string measure" and to use a microcontroller to output a calibrated value. You'd need to do a few test measurements to see what each setting outputs, but that can then be used by the microcontroller so that it can tell you exactly how many grams it will output at the current stop setting.
This is great input. Thank you Andrew 😃
I think a simple timer for the injection process would be enough.
Seconds to inject and seconds to release for holding pressure
@@hussamhyari can you elaborate on what you mean? Thanks in advance for sharing 😃
@@ActionBOX Injection time varies between parts depending on the part's geometry and size so if you add the capability to set the time of plunger going down (It represents the time of you holding the injection buttons), this will be more accurate than a varying limit switch.
also, injection machines need a holding pressure inorder for plastic not to return upward and cause defects to the part like sink marks, so setting a count down timer for the plunger to go back up after injection would be great.
super awesome, cant wait for more!
Great product and video guys, well done!
That would look so cool for my resin models
The design is so different than others on the market, would love to see longevity over time test results
Fantastic!! Congrats!!!
Awesome Build! Do you have any other documentation posted online (outside of these amazing videos that is!) ? Things like the CAD/CAM ?
I bet “Precious Plastic” and some other Open Source Hardware groups could really use a design like this. More ergonomic/faster than manual levers, but not as complex as hydraulic.
They plan to sell it so no files pretty sure, or at least not until they get back their time's worth in money.
Though the design is fairly simple, you should be able to design one yourself.
Yeah i was thinking the same. Maybe they could sell the designs and i hope the open source it. I cannot import this in my country so reverse engineering from the video it is
@@umerstar Did they not share files for the first version of the machine?
Indeed, they used to promote that they published everything as open source. But not quite sure if they're still up to that. Unfortunately subscriber numbers are still a bit low, so it could be reasonable that they are looking for new forms of income...
this is incredible! you guys should make/sell a machine that turns scrap plastic into 3D filament again. That'd be awesome.
Thanks, we are actually working on it right now. Make sure to subscribe to be notified of when it happens.
I have giant box full of plastic I can't do anything with. A machine like this and a shredder need to come to the market at an affordable price so everyone can get these things.
Actionbox WOW i buy your kit shure ! looking forward to receiving mine
You guys kick ass, keep changing the world for the better!
Thanks so much for your support Ross! We always love to read your comments on our videos! Cheers, Alan
@@ActionBOX You guys are the only youtubers I've ever and probably will ever donate to. I've got a programming background and kind of switched to cad/engineering in these last couple years, so I have a rough understanding of how long it takes to figure all this stuff out, and you guys just blow me away. You two have made so many things that I've needed that it's not even funny. I don't have the money currently, but I will be buying one of those injectors once I do. Like seriously thank you for doing this.
Impressive video! I really like the thoroughness - you covered a whole array of things and uses and workflows and considerations! Very cool!
Glad it was helpful! 😃
This is awesome, great work
I underestimated how much this would cost! Wow! It's super cool, just out of the budget at the moment. I will look forward to owning one someday though!
Awesome, Im glad to hear it. First 20 buyers get $200 off ~ use code 200OFF at checkout
Same here, patience is virtue 🥹
@@ActionBOX are we buying a machine that already built by you ? Or this is just a kid we have to build it ourselves?
@@kimbao164 it’s just the Kit. You need to build it yourself. check the website for more details.
man i need one of these in my workshop
This is a really cool project. Injection molding is just so far out of reach for the average person. I love this.
Thanks 😃. It’s been a really useful new tool around the shop.
If I'm ever reincarnated I want to come back as you guys. Brilliant stuff from brilliant minds.
Hahahah, thank you 😊. Cheers, Dave
@@ActionBOX Sent you guys a message on your website. Hope you get it. Love this stuff.
heeey really cool video thank you.
I still have a few questions. What exactly do you have to pay attention to with larger dimensonierug? About 100 grams of injection volume, for example? Will the plate still be able to do that at the top, or what kind of pressure is required? thank you
@Actionbox can you help me
Holy crap that is pricey. Great video looks so cool. I want one.
Very interesting. Looking forward to seeing more.
Awsome machine and just what the market needs, I will be buying one myself just as soon as I move into my new home
Sweet, thanks Adrian. I look forward to your order. Cheers
Freaking amazing... I am speechless. Keep it up.
Thanks Larissa 😃
This is awsome keep up the good work.
Would love to see some better bigger molds being filled.
Injekto sounds like tye name of a Spiderman's enemy.
Great video 👍
I have been 3d printing for many years and it's been a challenge to make good money at it without devoting all my free time to it! This would be a game changer for a small business to stay profitable!
I agree. We are hoping to help close that gap between 3d printing, and industrial grade injection machines. Glad you enjoyed the video 😃.
How about adding a fan on the cover plates for when the machine gets too hot ?
Awesome work... the double operator switch is real good idea.
Thank you Scott 😃. Im glad you enjoyed our video. Cheers, Dave
looks really cool
I love resin printing but I need this! I have been looking for my solution for years now! I loved your 1st Machine. But I’m going to have to order one soon!
Thats awesome, Im glad to hear and thanks for your support. First 20 buyers get $200 off ~ use code 200OFF at checkout. Cheers, Dave
Which nozzle did you use and why? and can you buy a replacement?
That would be a great tool to have at my local makerspace
Awesome!!! Congrats!!! Maybe one day Ill try it out on my channel!!!
Best Regards From Brazil!!!
Subscribed because you guys seem like superb Mechanical/Electrical engineers, but *maybe* not the best Project Managers. See a lot of waste and double efforts, but the things you put out are great. Keep it up!
Thanks for the compliment Shawn 😃. I’m curious what you mean by the “project management” comment. We’d love to improve if we can understand where we lack. Cheers
Hello,
What is the material used for the barrel and the plunger?
Good job guys !
commenting for more reach,Nice work, waiting for more!!
Man injekto 1.0 would really come in handy for me
I forgot to ask when you guys were planning on drawing for the injekto 1?
This is awesome
saw the shreddy first, injecto & shreddy are quite the pair, I like that you included the safety concerns (as a former bridge builder & FA-18 Mechanic I saw too many friends maimed just trying to do what I did because they didn't respect the safety concerns like I did. ... though I must admit when i was new i didn't either, and with experience & luck I was able to learn before hurting myself or anyone else.
Thanks 😊
Well done. Kudos.
You guys got the skillZ
have you injection molded any clear plastic (like very clear)? curious how your machine handles that. i've heard it can be challenging to injection mold clear plastic, but i don't know why. thanks
No we have not.
what is the shot volume of the Injecto 2.0 in grams? i see your site lists mL but not grams. thanks
Thanks for watching! If you are asking about injection volume, then the units would be in mL, as mL is a unit of volume. The weight of the injected material in grams would vary based on the density of the material you use. Which type of plastic do you intend to use with INJEKTO 2.0?
@@ActionBOX i'm not sure what kind of plastic i will need yet. right now i'm just working with resin casting which is mainly epoxy or polyester. i do know that the maximum weight of my parts in grams is usually less than 20 grams. next time i do a casting i will measure the volume too
@@dumbcat 20 grams of epoxy is around 17ml in volume, so the Injekto can definitely make it. Cheers