Prop: Shop - Molding & Casting 101: How to Make a Two Part Mold
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- Опубликовано: 24 авг 2024
- Learn the basics of making a two part silicone mold and how to cast a plastic resin piece from that mold.
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• Molding & Casting 101
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You can also get a silicone degasser to help prevent air bubbles getting trapped in the mold. They aren't super expensive and can really help your casts be a little more consistent.
Just wanted to came back 2 years later and say thanks so much for these videos. I made my first 1 and 2 part molds last week and achieved almost flawless results, well after a few goes at rotocasting anyway! With out this series I highly doubt I would have even tried but with the knowledge you two have shared it was almost easy. My next adventure will be a mask so I am sure I'll be rewatching those videos again a ton before I start pouring the rebound!
That's wonderful news! Great job. =D
I've never really had the courage to try molding, but I love watching the process. I'm glad I discovered your channel. Thanks!
so much better than my first mold.
Seriously, awesome! thanks, Bill! I'm working on a bunch of props and costumes for my sci-fi series and am binge-watching all your stuff... again...
Alway the best videos. You should come back and revise this or updated the videos but can mess with the classic.
Perfect video all on spot easy fast without any extra talks, very helpful ! Thank you!
For my first couple two part molds, before I actually got proper mold release, I sprayed a couple coats of crystal clear coat to act as a barrier between the silicone halves. I think Frank talks about that on the Tested two part mold lightsaber video. Works pretty well in a pinch. And a good alternative.
One thing I discovered is that after the first part, you can draw around the outside with a sharpie so you can see where the two parts come apart. Either that or tint each part.
Omg that came out sooo good!!! Better than the original master
Thanks very much!
Watching you use the tools to smooth the clay from the edges was oddly satisfying :)
It's a zen process :)
man this series is a real god send Bill!
Awesome Video! This will help a lot in improving my mold making skills! You have served as a huuuuge source of inspiration for me in my prop building. I hope one day to be half as good as you are at prop making and costuming. Thank you for all the helpful videos and inspiration!
Good coverage of the basics. Thanks Bill!
very nice video, I wanna start doing this at some point, with my twin kids (they're 3.5 years at the moment...).
Thanks for sharing, and Keep on trucking ! (from France)
many thanks....you explained this great....been doing 1 part molds for a year or so, but im going to need a 2 part soon.
Wonderful!
have you thought about putting together a small kit (i.e. your logo) for people who want to try casting but are too nervous to buy the expensive silicon
+Punished Props would a mini vibrating table help remove the bubbles from your molds. Much like they have vibration sticks in large construction to fill in the gaps and remove air bubbles use an old cell phone vibrator attached to a "floating" board to create a mini vibration for a few min
Superb video. Honestly. Clear and concise. Thank you.
Im definitely gonna make a mold of something!! Thanks for the awesome tutorials Bill!!
I also wanted to say you do some great videos. Thank you very much. I've used your videos and others to help jump start my cosplay game from simple found materia costumes to creating my own stuff from scratch. I will check out that Patreon page.
here is an unorthodox question (it may be a pretty silly one too).... if you were working with a smaller or medium sized mold, what would happen if you poured the resin into your mold, and then put the mold in the degassing chamber? would this help get air bubbles that are trapped in details on the piece? or would it cause some sort of insane reaction? i.e. damaging the mold itself, or actually adding more bubbles to the cast piece. I never see anyone do it, so i'm just curious if it would even work or what would happen if you did it.
Loving the series so far, extremely helpful! looking forward to the next episode!
cheers!
Check out plaster jackets for the moulds. Saves a fortune on the silicone.
Bill I noticed when shaking the mold for bubbles it can be messy. I know a tool fairly cheap . Buffalo Dental Lab Stone Mixer Vibrator No.1A Its a Vibrator for making stone molds or casts of peoples teeth. Being the stone can be a bit tough to work with IE bubble removal this tool would work well with Silicone/Resin materials as well.
I've seen many people using legos to make walls for their molds, any thought about this method Bill? Your videos help a lot, even in the other side of the ocean, thank u so much from France!
Lots of good information on this episode. Thanks for sharing this!
Happy to help!
I really wish you did a "you will need" section at the start
How effective is this technique for casting large objects like a sword? what tips would you suggest for when a mold becomes particularly large?
Does it also work if you use plaster of Paris instead of resin for the actual piece????
Flying fantastic, thank you!
Thanks so much for watching!
Absolutely love this video thank you for sharing!
Thank you so much for watching!
What if your master is a clay sculpt?
So here's a thought. Since NSP can melt, would it be a viable technique to heat some up until it's runny, and then pour it around your master for a perfect 90 degree seam clay base?
Great video, as always, thanks Bill.
Just wondering, once you've poured your resin into the mold is it worth putting it in to the vacuum chamber. Will it make any difference with the bubbles?
great tutorial. very clear
Mission accomplished I am inspired! I want to cast a statue I've made. If i don't have a degasser will the finished product be ugly and full of bubbles? It is a fine object with lots of small details and smooth skin surfaces ect.
You can use the "bombs away" method for pouring the silicone. This will help free any air bubbles. Tutorial video: ruclips.net/video/NVvGc7VDFvc/видео.htmlm7s
Frank Ippolitto doppelganger!
hello, taking on a bit of a hobby project, molding a vaporizer mod box. Its two pieces, a this cover that slides into notches, and the bottom have that will have the battery sled and all the electronic components. The bottom half is whats giving me pause. My plan is to mold it with the hollow part facing up, with a clay cylinder added to what is the left side to pour in resin to the mold. Does that sound feasible? Open question to any one that takes a look at this
Could you use foam board to make your box for your mold? The foam board you can buy at office supply stores that you would use as a display board.
now I know where I went wrong, thx Bill!!
Very educational. I'm enjoying this series and can't wait to try the two part mold on my pieces when they are finished. Quick question, which type of molding would be best for a halo/space marine helmet?
Cool, thanks. I will be sure to watch it.
Looks like you didn't apply enough mold release. It's OK, it all worked out in the end!
Can you reuse the mold for other projects, get it back to liquid or is the mold trash?
Hello hello, I'm reviewing your whole casting mood video, because I'm starting to do a lot of casting. My question is, is it mandatory for a sword (mines are warglaives wow), to make from the first mold literally half of my sword? To avoid the seam, I mean, if it is better if the seam is on the side blade and there is no problem sanding it, what about the edge? Thank you already for your answer because Cast and Mold is stressful the first times
its the vents that are stumping me, im going to be moulding a face hugger, im guessing 2 part but i have no clue where to place the vents or wether im better off dismantling my sculpture and doing 3 seperate ones, legs, body, tail.
You're like the Leonardo da Vinci of the future.
Well done videos... thanks for sharing...
Un excelente video, me encanta tu canal 👍
can we do this for rectangular bonsai pots ? maje a vid pls dude
Can you pour silicone rubber liquid over polyurethane rubber items? I don't want them to stick together.
How do you make the master though? What are good materials to make them out of like guns or weapons? Or pieces for armor?
Late comment, but what if you've made your master out of plasteline clay? How do go about making the clay 1st part of the mould?
If I make a prop out of EVA Foam can I make a mold out of it right away ? Or does it need to be prepared in some first.
So good
Thanks so much!
Loving the series so far. Your style is great and it's obvious you've put a hell of a lot of work into the videos. One question, when you say do a little dance is there one you recommend like say the cha cha or would a two step do. Just asking.....
+Bill Doran Awesome, I think maybe some interpretive dance mixed with moshing might be my thing, I'll give it a go. Thanks :)
Heya! Great tutorial, can't wait to try it out!
I have a Question though.. If you make the master object out of clay, how does that work?
I assume you can't really add clay to a clay master object, because it'll stick and you will lose detail.
There are a lot of Resin to choose from as you mentioned. To make a gun mold that will be subjected to contact with approximately 330 degree Kydex, is there a preferred resin to handle this? Thanks a bunch!
Can you post a link where you can get your tools like the razor blade do you use
whats your original props made of?
are there any other materials i can poor into the mold instead of urethane resin
Is there a real reason for casting a prop if you are only intending to do a 1 off? I'm working on a good solid MDF gun, but is there a benefit to casting it in resin for just me? Keep up the great vids!
stupid question incoming!!!! what if your pouring hole gets filled with resin and you dont want that on your piece? can you 'cut away' resin?
are you going to do a trial on how to cast a helmet
also, what would be the best silicone mold for a palm sized extremely reflective gold plated figurine?
I'd ask the folks at Smooth-On customer service! They're great at helping you figure out which of their products works best for your needs.
can you use silicone in the cast to get a rubbery mold? you probably have to use mold release on it first though right?
You can cast silicone from a silicone, but yes you really need to use mold release otherwise it'll all cure into a solid block of rubber.
hey bill can you make a video about the tested box figures i would like to se that
sorry for my bad english
thanks
A question unrelated tot mold making. Do you use some sort of lighting rig when recording video, or do you just use whatever light you have available in your shop?
If the piece has a front (showing) and back, then which side do you recommend to do first?
Can you use rebound 25 for this method? And do you guys have any videos that could help me figure out the best way to make a mold of an axe head with a hole through the middle of it for the wooden handle to go in?
Awesome
Punished Props Could i sand away the seem line to smooth or to not that noticeable?
Ok Thanks :)
Super educational as usual, thanks and keep it up! :D
Really nice!
If my master is made of plasticene clay (I have sculpted a figure), what material should I use to make the form of the mold before pouring my silicone? In your video your master is made of hard plastic and you use plasticene for creating your half-mold before pouring your first half of silicone. What material would work easily?
You can also use clay but a different kind. Frequently if our master is Monster clay, we'll clay the mold with Plastaline - you can probably use Monster clay or something similar for your mold.
Hey Bill and Brit ! Could you guys please post a link to files you used to 3d print that NN-44 blaster? Would be super happy to print it and follow along with you :)
how would you prepare the mold if you need to have an internal thread in your mold?
I'd block the hole for the mold-making process and then drill the hole out and tap it after casting.
Can the final cast be drilled? How hard is the resin part after cooling?
I really like your video, but how to make a two part mold of a hollow object?
Thanks! For hollow casts we slush cast: ruclips.net/video/PIUnzJr5oAc/видео.html
Hello bill i was curious about what type of materials you use for making model masters?
Thank you for sharing this information with us. Extremely informative.
I have a question, if anyone knows the answer. I need to make a 2 piece mold to cast a car part that is made of rubber. I need to know what needs to be done to the master to insure the silicone will not stick to it? I was told I could coat it with Vaseline before pouring the silicone, but wondering if this is the only option, or if there are other methods? I will be using polyurethane for the copy.
Will your final cast be in rubber as well? Typically your mold material should be the opposite of your casting material - so silicone for hard resin casts, and resin molds for flexible silicone/rubber casts. Mold release will be your friend as far as getting the silicone not to stick. I highly recommend asking the folks at Smooth-On about this, as they give awesome advice and can even recommend specific materials for you to use: www.smooth-on.com/support/
The final cast will be Urethane Casting Compound, 80A Hardness. The original part I need to copy is the lower rear coil spring seat. They are rubber. I'll need to make at least two copies of them, so the mold will need to be reusable. I'll contact Smooth-on and give them the details and see what they suggest. Thank you very much for helping me with this.
@@punishedprops Thanks again for your help and sharing your knowledge with us. Using Mold Star 30, Mann Ease Release 200 and McMaster-Carr Urethane Casting Compound, 60A Hardness I was able to reproduce the part I needed.
I'm loving this series! Super informative. Have you tried any other alternatives for making molds (other than silicone)? I've seen some smaller casts using brands like Composimold, but I'm not sure how well it would work with resin casts of a larger prop
I haven't really experimented a whole lot with materials other than silicone 'cause silicone has always done what I needed it to.
@@punishedprops Thanks!
I want to make a two part mould of an object which is mostly a hollow cylinder. Can this be done?
Yes. There is a video on making a lightsaber mold. Same idea. Clay halfway up. Pour half of mold. Remove clay, coat in release agent, pour second half.
@@hunhrrrright5453 Thank you! The cylinder is open at either end so not sure that method would work :(
@@cryd1239 sure! Add a straw sticking out the axis of your initial clay sculpt, or even a chopstick. When removed, it makes a perfect tract to the center. I made a hollow bat like that. Roto cast/ slush cast that way. Smoothon 325 is clear, so I added glow in the dark powder.
Is that the front of Rey's blaster from the force awakens?
***** Are you going to make a video on it?
Which silicone do you use ???
Hey bill I want to be a prop maker. I was wondering if I have to go to college for it. And if I do what should I major and minor in. Thanks 👍
+Venger Voldur thanks so much for this info I now know what the best path to my dream job is.
Is it possible to get a good result using Perfect Cast in a 2 part mold?
I'm not sure, I haven't used that material
Any thoughts on offering workshops anytime in the future? I know I would pay money to come learn on a weekend or something. I think I saw Artyfakes offers that kind of thing but I sure cant fly to Europe. Seattle would be much more affordable.
amazing series! (: so helpful! :D
Vc usou resina epoxi?
Urethane Resin is good with Latex molds!? Thanks
As long as there's no sulfur or anything inhibiting the cure, you should be good!
Es silicona de caucho???
I am casting, not with resin, but with more silicone in my silicone two part mold. Do I still use baby powder like how it is used in the video at 5:11 or do I just add more Mann Ease Release to both parts of my mold?
+SomeoneWithFreeTime You would need to use the Ease Release. Otherwise the silicone will bond to the mold, turning it into a solid block of rubber.
I am doing Hela for a cosplay. I plan on sculpting the antlers in clay and then creating a mold. Any suggestions for a light weight casting material?
You could slush cast it from urethane resin. That way it'll be hollow.
Thanks so much! Do you have a tutorial for that? BTW LOVE your guys channel!
having a bit of a panic attack cause my mold won't split apart.... how long did it take pry the two parts apart? I've been at it for like an hour (i used ease release 200 on mold star 30 silicone)
thank you for that! really helpful. I've made a skyrim dragon priest mask master to make a first ever mold with you because I think you have a really good interpretation and skills :D
Few questions I have :D
I need to use mold release or can I use vaseline for example. By the way if you do rondo slush directly in paper model you can easily separate paper from hardened bondo and resin mixture if you brush vaseline on the paper before slush... maybe you already knew that :P
And also do you know what is the biggest difference between polyurethane and polymer? I've checked in stores around my home and I could only found Polymer resins... but from the description it sounded similar to polyurethane.
Thank you for videos... I Can not wait for another video to come!!
What about if you have inner cavity that need to be just as accurate as the outside? Would primed wood be ok to set into and extend thru a 2 part mold?
+Beefalo Bart That would probably work.
Hi Bill. what is that piece of mdf on Reys' mold for? I assume in the end, it consumes more resin? What is the benefit? thanks a lot for the video!!! *-)
Hi, I am just starting, what kind of clay is that? thank you
Hello! The clay is linked in the description.
Question, I used a spray release and I never got two parts mold, then I have to cut it. I spray 3 times and wait like 1 minute between each time I sprayed. What i did wrong? Other question, Can I use a Lego block to make a walls mold and then put Vaseline/ I saw I videos about it but Im not sure if this work
I'm not exactly sure, but my guess is that you didn't use the appropriate mold release. I like Ease Release 200 for silicone. You should only need one good layer of the release sprayed on the cured half of the silicone. You can definitely use Lego for mold walls. You don't need to put Vaseline on the legos. The silicone will not bond to the plastic.
Punished Props Academy I used Smooth On spray release. Thanks