Ummm all I saw were perfect replicas of battledamaged Zaku shoulders. Toss those puppies in a deserted ruin city diorama and you got yourself a battlefield
A whole bunch of them in one place makes me think of someone collecting scalps or trophies from downed units - like how feudal lords would put heads on pikes. Seriously territorial Mad Max level vibes if done right.
Have you tried 2 or more piece thermo plastic molds. Then, drilling the vent holes to allow excess drainage under compression. Then, compressing the mold with a vice, remove and secure with a G clamp until set. Clean up excess. Thermo plastic molds can last longer than silicone and be recycled a few times before the plastic degrades. Don't forget to use a mold release.
Well good thing I had experience in casting and sculpting in resin. The results of those methods may not be good but I think I could make something usable out of them. Probably gonna try it on the beam effect runners first since I really want to make giant beam sword effects for later customs.
So i think what you need to do is add multiple injection points into the mold and an exhausting holes or gates to vent the trap air when injecting. Use any runner tree to make use for injections and venting paths.
So how should I go about if im using oyumaru as mold? If I use a paperclip to create exhaust port should I remove it before I fill both halves with sprue goo or after?
@hieuduong2213 paper clip might be too small, maybe like a straight 3mm sectiong from a runner with a gate at the end attached. Similar to the parts when they come on the runner.
What about thermal melting?? Use that glass syringe but warm it up before any plastic goes near it and suck up hot molten plastic then inject into your mold
Easy to say, hard to find the parts, rn I need one of the white parts from the backpack of an MG 1/100 Barbatos because I broke it like an idiot when I took it out from the runner, it still holds into place without any glue tho but I can't stand the thought a broken piece is on my first ever Barbatos:((. Luckly I have a friend with a 3D printer and he has a scanner too, hopefully it will work scanning the other piece and print it since they're both the same, he didn't use the scanner yet but we'll see what we can do this this Sunday.
I read somewhere that to avoid getting bubbles you keep your molds on something that shakes slightly or vibrates while it's curing this helps the mold to settle better and helps the air bubbles to move to the top I guess
I did a lot of testing with solvents dissolving plastics for various uses. Acetone is too "hot" of a solvent and evaporates very fast. This causes internal micro bubbles and make parts brittle and discolors the plastic. Use a "slower" solvent eg. Lacquer thinner. You used hobby cement which is a slower solvent. Your putty is too thick and you will not get it into all the crevices. 2 parts mold is better and you can apply thin layers and build up the part. Kind of like slush casting. Pour a watery solution into the mold and get it into all the crevasses. let it dry. This get the surface details. After tat you can putty the rest or build up in layers. It doesn't matter how because it won't affect the surface details. People get better results using Oyumaru ( Blue Stuff) because it is a stiffer rubber than silicone. Much better with pushing putty into the mold to get the shape. Silicone is too soft and deforms. Silicone is best suited for pouring. Note: Dissolved plastic in solvents will shrink over time. Not ideal for thick parts. Personally I would go with resin or epoxy putty that cures chemically instead of evaporation unless you need to fix a straight build with the same plastic and color.
I've seen this done successfully multiple times in a gunpla facebook group im in, however the guy that does it refuses to share his methods, he just says he melted the runner and made copies and that's as far as I know. I suspect he uses either clay or oyomaru blue stuff to make his molds though
I just bought my first gunpla kit after a 25 year hiatus. I haven't even put it together yet and I'm already watching videos about molding my own pieces. Talk about cart before horse. Man... My wife is going to hate me when suddenly our house is overrun with little plastic robots.
Should learn making mold using dental flask/bantam flask. That's how dental technician make denture mold for acrylic dentures. I'm not yet on the point of making duplicates of parts. But if it comes to that. That's what I will do.
I recommend a two sided mold, because you are not having to force the melted plastic inside the silicone rather using a more melted and liquid base resin.
Never reuse acetone rendered plastic. The quality of the plastic dimensions every time you do it. you need to use this little acetone as possible in a in a sealed container and let it sit for several days. curing the molds in a super cool environment to prevent pockmarks. If the acetone evaporates too fast it creates bubbles. Try investing in a scientific hot plate with super accurate temperature control. With a pour mold and hot melt plastic your copy's will be much better off and easier to finish.
What ratio of plastic to acetone did you use to get the taffy consistency? I have an idea of using this method to roll out flat sheets to make home made pla-plate.
Perhaps using a two part m9ld to allow "painting in" a layer of plastic to act as a thin shell before adding in more plasric to bulk out the structure.
Yeah but trying to find STL files for exactly what you're looking for is like a needle in a haystack more often than not. And as far as making custom files... I don't know how folks do it, I've tried my hand at some basic stuff and it's was super confusing lol. Never have found a dummies guide for it yet
This is a well-made and informative video, so I don't want to dislike it, but you totally clickbaited us all with that title. Best of luck though, I hope someone can figure out a more consistent process for this in the future.
Bluestuff and epoxy putty would probably be the easies diy at home way to do this if you are wanting a "perfect" part. or bakers clay works too but that would probably cause weight issues on some parts.
From videos I’ve seen, when you made the silicone mold for the cast, you didn’t use a vacuum sealer to get rid of the bubbles in the silicone. I think that’s why there’s always gonna be bubbles. Maybe even vacuum seal your resin too but idk bout that
What about getting a candle warmer? Just put the parts in a Pyrex dish sitting on a candle warmer and turn it on. Very slow warming with indirect heat. Shouldn't burn or bubble and will give you liquid plastic with no solvent.
so i melted down some gundam runners with acetone to make a replacement part i can not find anywhere and i was wondering do i have to let it dry for a very longtime to hard good because my first try the part came out very soft and was a nothing like the video lol
Yes, it takes a VERY long time to dry/harden. At least 24 hours. Even if the outside seems completely cured, the inside of the part may still be squishy.
I was trying to find a materials to make the mold at a local arts and crafts store. Like never dry modeling cay or air dry clay or silcone 2 step mix for molding if you don't mind can you give me a suggestion
Im currently experimenting with melting runners down to make duplicate parts, as of right now iv had two fails. I know one of them failed mostly because the mold i made wasnt quite up to snuff, the second piece looked as if i hadnt used enough melted plastic. Maybe try more plastic and making multiple molds of the same part to make sure your mold isnt damaged from removing the original part you're copying.
Looking to the injection molding system you're going the right path but you should always introduce at least 40 to 50% new plastic using the old plastic which has been melted down will never give you true consistency if you can try using it tumbler system or heating system to melt the plastic take a look at how people make their own filament for 3D printers that should answer a lot of your questions
If you still have those warped parts, you can probable still use them as old or damaged gundam parts, or build an entire Gunpal figure from them, but as old or destroyed background pieces too XD
I see a few people suggesting a 2 piece mold and from years of working in plastic mold manufacturing plants I would suggest the same while also using a stronger mold like hot glue or even an epoxy based mold along with the injection method you have going. yuo can use a glass or metal drinking straw for the runner port. The only question I have to it would be if the chemicals would have a negative effect.
Definitely. I've only recently started using oyumaru for resin but it should work just as well for melted runners (provided you don't get bubble like I did)
not bad dude. thanks for the hack tips for me, i dont care for bubble. it can be fix with some work of sandpaper and filling with putty (or with that melted spure) you can painted after all, in that case for shoulder zaku of course doing some project like this with acetone it require mask to do it, the fume is dangerous for lung
I tried melt the runner using candle in the metal plate that usually use for paint. It formed a nice round plastic. Am still looking for way to cast something more useful
You can definitely use the Tamiya Cement. Melt time depends on how much plastic you are melting, how small you cut it beforehand and amount of cement, but anywhere from 4-6 hours usually. I recommend closing the container somehow to accelerate the process and save cement, as it will begin to evaporate in open air
i know this is and old video, and i have yet to look to see if there is an updated version, but would a vacuum chamber or pressure pot help get rid of bubbles like with resin?
@@MidnightHatter I've cracked the code, I figured out how to get rid of the bubbles. You have to thinly oil the mould, then "paint" the mould with the filler goo (you have to only add a small amount of plastic to the glue for this step.) Let that harden until you have a thin shell like coating on the inside of the mould. Then further thinn the goo with acetone and fill the part to thickness and let dry. Once removed you will notice a smooth finish on the exterior of the part. I've had best results with parts that come in two halfs and doing open half molds.
@@MidnightHatter Thinking about this further you could probably collect the runners, and make a mold of an entire Zaku or other Grunt model using this method. Then using a blow torch to partially melt the suit or soldering iron cut the molds up into pieces. You could use the destroyed suits as part of a Moc to make your Gundams look more badass.
I have no clue why you wouldn't just use putty and paint it. He went through days upon days of work plus a massive cost to make this video all for naught. There are very cheap and easy ways to replicate parts already.
Generally speaking, yes, if I cast the parts in resin. Unfortunately the melted runners will never totally fill a mold. I found this video that attempted a much less complex mold than I did and he got just as poor results: ua-cam.com/video/1O-MSfI73SY/v-deo.html
@@MidnightHatter when my oyumaru arrive i Will try and see what happen, if you try this again maybe try to let dry a little time the melt plástico before put in the mold
It will never get better, this hobby has been around 50 years and the runner putty technique has been around just as long. As he mentions eventually the method just does not work because of the changes done to the thermoplastic.
You have to add a cream of tartar to the acetone/p.cement runner mixture. This is the secret for anybody actually looking
Explain? I have to know more lol
I would like to know more about this, since I have a part that has broken that is not easy to replace.
Ummm all I saw were perfect replicas of battledamaged Zaku shoulders. Toss those puppies in a deserted ruin city diorama and you got yourself a battlefield
A whole bunch of them in one place makes me think of someone collecting scalps or trophies from downed units - like how feudal lords would put heads on pikes. Seriously territorial Mad Max level vibes if done right.
@@osakanone a hangar of trophies
I was thinking the same thing. If you like building warlike models, there's your unlimited Gunpla.
Word creativity at its finest
This is the way.
Have you tried 2 or more piece thermo plastic molds. Then, drilling the vent holes to allow excess drainage under compression. Then, compressing the mold with a vice, remove and secure with a G clamp until set. Clean up excess. Thermo plastic molds can last longer than silicone and be recycled a few times before the plastic degrades. Don't forget to use a mold release.
I think your failed casts look GREAT as battle damaged pieces 👍👍
The definitely do! It may be cool to make a few swappable armor pieces for a damaged suit!
Well good thing I had experience in casting and sculpting in resin. The results of those methods may not be good but I think I could make something usable out of them. Probably gonna try it on the beam effect runners first since I really want to make giant beam sword effects for later customs.
Your techniques are good, it's your mould that wasn't perfect ;)
I think if you sand it down it will look smooth and scribe the details
Finally I can fix a broken peg
So i think what you need to do is add multiple injection points into the mold and an exhausting holes or gates to vent the trap air when injecting.
Use any runner tree to make use for injections and venting paths.
So how should I go about if im using oyumaru as mold? If I use a paperclip to create exhaust port should I remove it before I fill both halves with sprue goo or after?
@hieuduong2213 paper clip might be too small, maybe like a straight 3mm sectiong from a runner with a gate at the end attached. Similar to the parts when they come on the runner.
Title is clickbaity, the concept if interesting and its fun to see the effort.
thank you very much for the video, a question for the very small pieces, how do you recommend doing?
What about thermal melting?? Use that glass syringe but warm it up before any plastic goes near it and suck up hot molten plastic then inject into your mold
how about if you use it as a the liquid material for 3d printing? are they both the same type?
You have to put it in a vaccum to get rid of the air bubbles
what could i use for the molds???
Silicone rubber is the best choice but it is not cheap. There are a lot of things I would do differently if I did this experiment today.
melt it with heat instead
At this point, probably easier (Although more expensive) to just 3D print the part.
You're not wrong!
The hard part there I guess would be making the 3D model, though I guess there are a lot of good 3D scanners today that accurately recreate the parts.
@@zkace scanners can be expensive
Not everyone can afford a printer though
Easy to say, hard to find the parts, rn I need one of the white parts from the backpack of an MG 1/100 Barbatos because I broke it like an idiot when I took it out from the runner, it still holds into place without any glue tho but I can't stand the thought a broken piece is on my first ever Barbatos:((. Luckly I have a friend with a 3D printer and he has a scanner too, hopefully it will work scanning the other piece and print it since they're both the same, he didn't use the scanner yet but we'll see what we can do this this Sunday.
I read somewhere that to avoid getting bubbles you keep your molds on something that shakes slightly or vibrates while it's curing this helps the mold to settle better and helps the air bubbles to move to the top I guess
And ultrasonic cleaner would do the job, just secure the molds after poured and turn it on
Or a vaccum pressure box
I genuinely found this video inspirational. I’m glad you’ve kept at it.
Thanks! I still haven’t given up!!
I did a lot of testing with solvents dissolving plastics for various uses. Acetone is too "hot" of a solvent and evaporates very fast. This causes internal micro bubbles and make parts brittle and discolors the plastic. Use a "slower" solvent eg. Lacquer thinner. You used hobby cement which is a slower solvent. Your putty is too thick and you will not get it into all the crevices. 2 parts mold is better and you can apply thin layers and build up the part. Kind of like slush casting. Pour a watery solution into the mold and get it into all the crevasses. let it dry. This get the surface details. After tat you can putty the rest or build up in layers. It doesn't matter how because it won't affect the surface details.
People get better results using Oyumaru ( Blue Stuff) because it is a stiffer rubber than silicone. Much better with pushing putty into the mold to get the shape. Silicone is too soft and deforms. Silicone is best suited for pouring.
Note: Dissolved plastic in solvents will shrink over time. Not ideal for thick parts.
Personally I would go with resin or epoxy putty that cures chemically instead of evaporation unless you need to fix a straight build with the same plastic and color.
Please figure this out. Please. Great video. Thank you for your trials and tribulations.
Yeah, this could be useful for translucent parts if perfected
I've seen this done successfully multiple times in a gunpla facebook group im in, however the guy that does it refuses to share his methods, he just says he melted the runner and made copies and that's as far as I know. I suspect he uses either clay or oyomaru blue stuff to make his molds though
What group is it?
They use Oyumaru Blue stuff as the Mold
Have you thought about using a heat gun? I know that using a heat gun can eliminate some if not all the air bubbles in other things.
have you tried to cast an entire model kit out of silicone while the parts were still on the runners?
I just bought my first gunpla kit after a 25 year hiatus. I haven't even put it together yet and I'm already watching videos about molding my own pieces. Talk about cart before horse. Man... My wife is going to hate me when suddenly our house is overrun with little plastic robots.
Hahaha, my wife hasn’t left me yet. There’s hope!
Do you have any solution? Because i really need to copy my missing gundam part.
Lol, dang. Wishful thinking with the title. At least you did the trial and error for us. 😁
Should learn making mold using dental flask/bantam flask. That's how dental technician make denture mold for acrylic dentures. I'm not yet on the point of making duplicates of parts. But if it comes to that. That's what I will do.
Now that’s a clever idea.
I recommend a two sided mold, because you are not having to force the melted plastic inside the silicone rather using a more melted and liquid base resin.
Never reuse acetone rendered plastic. The quality of the plastic dimensions every time you do it. you need to use this little acetone as possible in a in a sealed container and let it sit for several days. curing the molds in a super cool environment to prevent pockmarks. If the acetone evaporates too fast it creates bubbles. Try investing in a scientific hot plate with super accurate temperature control. With a pour mold and hot melt plastic your copy's will be much better off and easier to finish.
What ratio of plastic to acetone did you use to get the taffy consistency? I have an idea of using this method to roll out flat sheets to make home made pla-plate.
It was a lot more acetone. Probably 2 to 1 to cover it all. But I have since learned what I did wrong. I expect we'll talk about it on stream today.
Perhaps using a two part m9ld to allow "painting in" a layer of plastic to act as a thin shell before adding in more plasric to bulk out the structure.
$500 elegoo saturn. Prints in 4k with submilimeter accuracy. It would be alot faster and easier on you.
Yeah but trying to find STL files for exactly what you're looking for is like a needle in a haystack more often than not. And as far as making custom files... I don't know how folks do it, I've tried my hand at some basic stuff and it's was super confusing lol. Never have found a dummies guide for it yet
Complex double boiler? Wouldn't a Au Bain Marie setup work? I'm sure you've got a glass bowl and a sauce pan at home to try it with
Finished in a timely manner (he wont)
Boy I feel that.
This is a well-made and informative video, so I don't want to dislike it, but you totally clickbaited us all with that title. Best of luck though, I hope someone can figure out a more consistent process for this in the future.
Yo, I recommend getting a drill master heat gun. It melts plastic quickly and isn't gonna ruin your lungs
you can just heat it up slightly also in the microwave helps with making it more runny works wonders
uhmmm ... i think the problem not lies on the recycle abs... but yea... the recycle wont be as fluid nor as accurate compare to the 1st
I have a question. Can you make two pieces mold using plaster/gypsum powder? Silicone is kind hard to get in my place.
I’ve never tried it, but I don’t see why not.
Bluestuff and epoxy putty would probably be the easies diy at home way to do this if you are wanting a "perfect" part. or bakers clay works too but that would probably cause weight issues on some parts.
From videos I’ve seen, when you made the silicone mold for the cast, you didn’t use a vacuum sealer to get rid of the bubbles in the silicone. I think that’s why there’s always gonna be bubbles. Maybe even vacuum seal your resin too but idk bout that
What about getting a candle warmer? Just put the parts in a Pyrex dish sitting on a candle warmer and turn it on. Very slow warming with indirect heat. Shouldn't burn or bubble and will give you liquid plastic with no solvent.
Stay tuned, I’m working just that idea 😉
so i melted down some gundam runners with acetone to make a replacement part i can not find anywhere and i was wondering do i have to let it dry for a very longtime to hard good because my first try the part came out very soft and was a nothing like the video lol
Yes, it takes a VERY long time to dry/harden. At least 24 hours. Even if the outside seems completely cured, the inside of the part may still be squishy.
I'm also using never dry modeling clay to make the mold not sure if it was a good idea but the first two attempts I didn't let dry long enough
I was trying to find a materials to make the mold at a local arts and crafts store. Like never dry modeling cay or air dry clay or silcone 2 step mix for molding if you don't mind can you give me a suggestion
Doing it in a vacuum would prolly fix your air bubble problem
2:26 Ayo, where’s that clip from?
Im currently experimenting with melting runners down to make duplicate parts, as of right now iv had two fails. I know one of them failed mostly because the mold i made wasnt quite up to snuff, the second piece looked as if i hadnt used enough melted plastic. Maybe try more plastic and making multiple molds of the same part to make sure your mold isnt damaged from removing the original part you're copying.
Looking to the injection molding system you're going the right path but you should always introduce at least 40 to 50% new plastic using the old plastic which has been melted down will never give you true consistency if you can try using it tumbler system or heating system to melt the plastic take a look at how people make their own filament for 3D printers that should answer a lot of your questions
DAMN!!! I was excited to do this but it's a fluc
Seems like it might be necessary to add some more additives to help preserve the structure.
Try placing the mold in an air vacuum if you can find one, it might help reduce bubbles
Thanks for this video. I thought I was one of the few thinking of this idea. Definitely gonna try my hand at it as well.
I tested double boiler......
and the double boiler can't be used with food anymore
😂
If you still have those warped parts, you can probable still use them as old or damaged gundam parts, or build an entire Gunpal figure from them, but as old or destroyed background pieces too XD
That’s a great idea!
@@MidnightHatter this was what sold me to getting gunpal for the longest time XD
ua-cam.com/video/HAJ6ElZoDl8/v-deo.htmlsi=YpYOPV8HqbCB19zW
I least you tried
Tell me sir glue your using in video?
Hi hi hi man go youse a 3d prienter
This is a cool idea. I hope to see more experiments.
I see a few people suggesting a 2 piece mold and from years of working in plastic mold manufacturing plants I would suggest the same while also using a stronger mold like hot glue or even an epoxy based mold along with the injection method you have going. yuo can use a glass or metal drinking straw for the runner port. The only question I have to it would be if the chemicals would have a negative effect.
Hi, do you think this would still work if you used oyumaru for the mold?
Definitely. I've only recently started using oyumaru for resin but it should work just as well for melted runners (provided you don't get bubble like I did)
Thanks! I've been trying to come up with ways to use up the left over plastic and this vid has been pretty helpful.
with what liquid did you melt it
First I tried acetone, then plastic cement.
Man the title is such click bait
@@imsilverahuman4108 you mean what he fails at attempting? He doesn’t cast any new parts from the runners. Nothing useable.
hmmmm but you can make some pretty sick stuff though. like weapons, diorama parts
not bad dude. thanks for the hack tips
for me, i dont care for bubble. it can be fix with some work of sandpaper and filling with putty (or with that melted spure)
you can painted after all, in that case for shoulder zaku
of course doing some project like this with acetone it require mask to do it, the fume is dangerous for lung
How about sandwich type molds? You know, where you need to apply pressure?
I tried melt the runner using candle in the metal plate that usually use for paint. It formed a nice round plastic. Am still looking for way to cast something more useful
I would totally love to see how you make molds.
I had an idea well watching this idk if it would work but let's say you melt it all down and make it into a sheet similar to plaplate?
And may be you have not youse a lot of tameya seman dan dat might got the results for the parts 😅😅😅😅
are you sure its got nothing to do with how long you let it cure and the temperature of your room?
1.can i use 20ml tamiya cement (yellow)?
2.how long it takes to "melt"??
You can definitely use the Tamiya Cement. Melt time depends on how much plastic you are melting, how small you cut it beforehand and amount of cement, but anywhere from 4-6 hours usually. I recommend closing the container somehow to accelerate the process and save cement, as it will begin to evaporate in open air
what if you pour resin into those molds, would that work?
Sprew goo is a good thing to have on hand lol
Curious what kind of ventilation you got going on.
those imperfect molds can be used for battle damaged parts
I really like two part molds when it comes to trying to do something like this
Great video! Awesome you experimented so much! You are a winner!
i know this is and old video, and i have yet to look to see if there is an updated version, but would a vacuum chamber or pressure pot help get rid of bubbles like with resin?
Oh yes a pressure pot will 100% get rid of the bubbles in resin. Doesn't do anything for melted runners though.
@@MidnightHatter I've cracked the code, I figured out how to get rid of the bubbles.
You have to thinly oil the mould, then "paint" the mould with the filler goo (you have to only add a small amount of plastic to the glue for this step.) Let that harden until you have a thin shell like coating on the inside of the mould.
Then further thinn the goo with acetone and fill the part to thickness and let dry.
Once removed you will notice a smooth finish on the exterior of the part.
I've had best results with parts that come in two halfs and doing open half molds.
How do you make polycaps?
Yes please teach me how tow make li
While not useful for you. I’m pretty sure I can use this to patch my broken beam saber. So thanks.
I’ll take that as a win
@@MidnightHatter Thinking about this further you could probably collect the runners, and make a mold of an entire Zaku or other Grunt model using this method. Then using a blow torch to partially melt the suit or soldering iron cut the molds up into pieces. You could use the destroyed suits as part of a Moc to make your Gundams look more badass.
What if you go over the finished product with thin cement to melt and smooth out the imperfections?
I have no clue why you wouldn't just use putty and paint it. He went through days upon days of work plus a massive cost to make this video all for naught. There are very cheap and easy ways to replicate parts already.
Will a 2 part mold work?
Sorry for asking I'm new to this
Generally speaking, yes, if I cast the parts in resin. Unfortunately the melted runners will never totally fill a mold. I found this video that attempted a much less complex mold than I did and he got just as poor results: ua-cam.com/video/1O-MSfI73SY/v-deo.html
Ty for taking time to reply
Will it still solidify after being melted by acetone?
It does! The acetone evaporates out of the plastic eventually
You looks like you used the thin type have you tried using heavier duty plastic cements?
I haven’t! Perhaps that would make the difference?
It turned a small runner in toothpaste in 6 minutes
I have an idea for you have you tried cutting the runners into really really small pieces smaller than the ones in the video
Like about the size of a rg pilot figure
You can make this with oyumaru beside a silicone mold?
I would say probably not. The plastic would fuse together I think. Silicone doesn’t stick.
@@MidnightHatter when my oyumaru arrive i Will try and see what happen, if you try this again maybe try to let dry a little time the melt plástico before put in the mold
@@MidnightHatter i found this video maybe you can take some ideas ua-cam.com/video/1O-MSfI73SY/v-deo.html
I see he had similar issues as I did, but a vice grip with a harder mold isn’t a bad idea... 🤯
I use resin and Oyumaru to recast parts with great success.
I'd love to see your method the more we can see the better we can all refine it
It will never get better, this hobby has been around 50 years and the runner putty technique has been around just as long. As he mentions eventually the method just does not work because of the changes done to the thermoplastic.
maybe use resin and put in a vaucum pot. to pull the air our. try that on a silicone mold as well to maybe get a better mold of the part