Rotocasting Small Parts In Urethane Resin
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- Опубликовано: 15 сен 2024
- Hollow casting urethane parts doesn’t require expensive equipment; you can do it easily with a home made rotational molding machine. Hollow casting saves money on resin and makes lightweight part. Plus it’s a lot of fun!
Would you like to mold and cast something but have no idea how to start? Send pics of your project to me and maybe I’ll do it as a RUclips video.
Here’s a .pdf with the info:
www.dropbox.co...
This guy is so old school I can’t stop smiling, this is how I did stuff for so, so, long. Simple, effective solutions, 🧢🧢 off!
Great video and the rotocaster works fine.
Very interesting to watch what a great channel you have Robert. I recall visiting my parents chocolate factory as a child and this is exactly how they would make hollow shells on a large scale with many sheets of molds on a big rotation path one after the other. So cool I had completely forgotten. Thank you for sharing your skills!
I love your channel! I'm a resin noob but am definitely going to build my own rotational casting machine. Great stuff! Thank you!
Thanks John! Glad the channel helps you out.
Enjoyed watching...Thanks!
Thank you!
Great videos. Thank you for sharing your knowledge.
Thanks for watching John!
i n t e r e s t i n g
Hi I'm from Nigeria.. can the technique be used for making car bumbers
Very instructive! Thank you. May I ask which resin you are using?
I used a urethane resin from a company called Silpak. They are not a sponsor; I have been buying my molding and casting supplies from them for 25 years. Find them at:
www.silpak.com
Would you get better resurrects if you rotated the frames more slowly? You seem to spin it pretty fast. Also what product do you use to make the mold and what is the resin you use? I understand they make resins designed for rotational casting.
wiii nice
Does Toto casting help eliminate bubbles ?
Robert you spin your mold quite fast, the resin is like thin yoghurt even at the start. Would rotating more slowly make any difference?
I have spun slow, I have spun fast. What seems to matter most is having the proper amount of resin in the mold for each shot. Ideally you want just enough resin to coat the mold but not so much that it pools up inside the mold.
Is the resin evenly distributed throughout the rotational casting process? This might be just what I've been looking for, but I need the thickness to be uniform.
You can never completely control the thickness of the interior wall. The best way is to rotate in several small batches; each one should be just enough to coat the interior.
@@RobertTolone thank you!!!
Robert, I have been struggling with liquid silicone that is really sticky. Any advice? Changing the ratio has caused the silicone not curing. So frustrating, round no4!
Is it sticky because it is not cheering against the model?
Can I 3d print the parts for a small rotocasting machine like this? I'm terrible at woodwork
Yes, I am working on small rotators made by 3-D printing and also laser cutting. So I’m sure you could design whatever you want successfully
@@RobertTolone would love to see the result of that
Hmmm...if you made the interior frame out of wider stock you could hit it with a compressed air blast to get it spinning.
But flipping the gimbal doesn't look like to much of a chore.
It’s helpful to have a clear idea of how and why you are rotating the mold. Often a random rotation pattern works best but sometimes you rotate in a particular orientation to make a better casting from the mold.
New sub. Wanting to cast my sculptures. Do you have a video on how you made your rotational device? If not, will you make a video so we can learn how to make one too? Thank you!
RV Homesteader Thanks so much for subscribing! I am planning a video about building a rotocaster. The machine is very simple but it’s important to understand how rotational molding works, when to use it and why. So I will also be covering the fundamentals of hollow casting urethane resins. It’s a fun process and you can get really amazing results with it!
@@RobertTolone Thanks so much for your quick response. I am wanting to use a new (to me anyway) soft resin to cast dolls with. I wanted to do threaded hair on them, and thought the soft resin might be the ticket if I can make them hollow.
Sir you mentioned making a video on how you make your own rotation molding spinner. I am sorry 😞 but iI am unable to locate it via my searches. Would you be so kind to point me in the correct direction.
Thank you
Da Gunny
I want to make some doll heads (think barbie size more or less), and I want to use this method. Do you think urethane rubber is suited for this project and does it matter what size I make the device for such a small project?
If there's a video on making the device please let me know! Definitely subbing, great content.
Thanks for watching! You can use urethane rubber for cut molds and rotocasting molds. The urethane rubbers that I have experience with tend to be tougher and harder to cut than silicone rubbers. But they can be cut. They also stick to almost anything and need the appropriate release agents to separate them from the model, sprue system and mold case. Also, the casting material must be compatible with both the urethane mold and hollow casting. Test everything to see how things work out. I’m planning a video on building a rotocaster which will be out soon. Stay tuned!
@@RobertTolone thanks for all the info! I'm brand new to all this, so I know there will be tons of trial and error but I feel like that's all part of the fun😋
I wonder what casting would be like in zero gravity.
You would have to pump the resin into the cavity but if it was also in the vacuum of space you wouldn’t need any vents, just 1 small injection sprue!
Ayo