Create DIY homemade rubber seals and gaskets for your parts, with resin prints and silicone molds.

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Hello and welcome.
In this video I'll take you through the process I used to design and create rubber seals for my projects. They are 3d printed using SirayaTech Blu resin. Then a mold is made with Smooth-On's Mold Max 30. And then they are cast with Alumilite's Flex 60 Urethane rubber. These rubber gaskets can be made in different shapes and sizes and can be used to seal up containers, boxes, jars and other items.
Thanks for watching.
If you would like to buy some of the things I make check out the links below.
My shop: www.RichardThompson.ca
Things I make on my etsy page: Etsy.com/shop/RichardThompsonCA
My commercial illustration site: www.rtillustration.com
Follow me on Instagram: / learn.imagine.create
Follow me on Facebook: / richardthompsonillustr...
This video is for entertainment purposes only, I make no warranties about the completeness, reliability and accuracy of the information contained therein. Any action you take upon the information in this video is strictly at your own risk, and I am not liable for any losses or injuries incurred as a result.
#casting
#handmade
#alumilite

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Опубликовано:

16 июл 2022

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Комментарии : 65

@RichardThompsonCA 2 года назад

If you have any suggestions/advice for better/other ways of making gaskets, post them in the comments below! Edit: I don't bother with vacuum degassing the flex 60 now, it's a waste of time if you're putting them in a pressure pot, and with such a short pot life, you really need that extra time. I also don't bother baking the gaskets any more, I just put them in a pressure pot for 2 hours to cure at 60 p.s.i. I've also recently switched to Alumilite's Flex 80. It's noticeably firmer, more like roller blade wheel and works much better for my purposes.

@gavinlynas2833 11 месяцев назад

Regarding your original idea on injecting a clamped mould. Perhaps if you simply added more holes and blocked each one once the liquid started to enter, it may have worked. Or you could have tried to suck air out of the mould at the same time as injecting.

@PeterWheeler-cf3xo 13 дней назад

Great job

@rawleystanhope3251 Год назад

Great video. And thanks for touching on what didn’t work. The cure inhibitors in the resin print has tripped me up in the past; I’m excited to try baking

@eugenetswong 10 месяцев назад

Thank you for this. I was just browsing my RU-vid main page, and then RU-vid recommended this. I never knew that this was doable.

@RichardThompsonCA 10 месяцев назад

You're welcome.

@user-tk1lf5hi6f Год назад

Thanks for the video - I did not know this was even possible.

@RichardThompsonCA Год назад

Glad to help

@TheRealJavahead 10 месяцев назад

Great video. Subscribed. Cheers.

@Imtiyaz5power 5 месяцев назад

Thanks Sir

@JustMrFox Месяц назад

Would’ve been nice if you mentioned in the video that you also need a vacuum/pressure chamber and not only “put it in the oven” And also would be very nice if commented on toxicity of urethane and the fact that you need to do it in a well ventilated area (not in your apartment) and probably wear some respiratory protection?

@xQKUg9S Год назад

very useful

@RichardThompsonCA Год назад

Glad you think so!

@AlarKemmotar 10 месяцев назад

I read the title as "How to cast a custom casket" and was very confused!

@RichardThompsonCA 10 месяцев назад

That would be a LOT of silicone :-)

@bdempster82 7 месяцев назад

Hi Richard, are you cating the urethane into a silicone mould for ease of removal only? I'm thinking of doing something similar but casting straight into a SLA print which will be rigid, thanks.

@RichardThompsonCA 7 месяцев назад

There were a few reasons, ease of removal was one. The shape of the gasket has a severe undercut and it may not pull out from an inflexible mold. Number 2 is inhibition. I had problems in the past with silicone and resin prints, and while I haven't tested this urethane with 3d resin, I didn't want to risk it.

@Rafameister Год назад

What equipment or method do you use to degas the urethane casting material before injecting it into the mold?

@RichardThompsonCA Год назад

I used to degas it in a vacuum chamber and then put it into the oven. But I wasn't sure that was helping any and since this stuff has a pot life of only 4 minutes I don't waste time on that any more. Now I inject it into the mold and put that in a pressure pot to handle any bubbles. This has been working well for me so far.

@lazarusrex9545 Год назад

Im looking to male some GITD O rings for a flashlight with some of the brightest glow powder on the market. Would this method work for that?

@RichardThompsonCA Год назад

The shape will be the problem. I designed the profile of these gaskets to be flat on all sides, this allows for the open face mold. The o ring is a cylinder, I suspect you would need some kind of injectable mold for those. I tried injection molds and couldn't make it work.

@sylaswojciechowski6895 2 месяца назад

1:26 did you add a hole at the other end of the mold for the air to escape? Looks like you are fighting against the pressure created by compressing the air inside of the mold.

@RichardThompsonCA 2 месяца назад

The vent hole is actually next to the injection port. I figured if I made the hole on the other side the silicone wouldn't go all the way around to fill the mold.

@gigmaresh8772 8 месяцев назад

Can this mixture be used to create gaskets for automotive parts. Say like a front cover for a water pump?

@RichardThompsonCA 8 месяцев назад

I don't see why not. It would depend on the requirements for heat resistance, chemical/oil resistance, uv resistance, etc.

@Xlatty 5 месяцев назад

Can you tell me where to get that wax pen, have seen others but not that one

@RichardThompsonCA 5 месяцев назад

I got it from Amazon. Just search for "electric wax carving knife/pen/machine" There's a lot of them on there.

@jesserivera9704 10 месяцев назад

wax pen? wax PEN??!! subbed subbed subbed

@titter3648 Год назад

How does it stand up to chemicals and heat?

@RichardThompsonCA Год назад

I haven't done any tests, for my purposes the gaskets don't need to survive either, and I couldn't find any information about heat or chemical resistance on Alumilites websites. I guess those properties could be found in your materials SDS sheet, assuming you can find one🙂

@aquamansurfer 9 месяцев назад

Hi, ¿what about using directly the tpu 3d printed gasket? Is it's quality enough to be air and water tight? Thanks

@RichardThompsonCA 9 месяцев назад

If you mean using an FDM printer to make a tpu gasket, I'm not sure if that would work. I don't have an FDM printer that can print tpu (you need a direct drive printer for that). But based on standard FDM prints I don't think it would be airtight due to the layer lines. I also don't think you would get the tolerances needed. When I print these things they have to be within 0.1 mm or they don't fit correctly. I don't think that could be achieved with any reliablity with an FDM printer.

@aquamansurfer 9 месяцев назад

Thanks for answering Richard ! I mean to print a gasket directly on SLA with a resin equivalent to fdm tpu, ¿would be repeatable once you find the right settings and size? Or you think would be any problem with that kind of print . I.e. to print a conical gasket like the one you used for make the molds and use it directly to seal. Thanks

@RichardThompsonCA 9 месяцев назад

@@aquamansurfer It's really going to depend on the resin. I don't know if anyone is making a UV curing resin that's as tough/strong as casting urethane. It would require a lot of experimentation with different resins to see what works. It also might be a problem if you need something food grade as I don't think any of the 3d printer resins are. Also, you would probably have to keep it out of the sun and away from UV light sources. All the printer resins I've used will get more yellow and brittle if you post-expose them under UV light too long. Also it may not be as chemical/heat/abrasion resistant as a cast one. The chemistry is quite different between thermoset elastomers and UV curing resins. So there would probably be a lot of compromises to 3d print them. Just something to think about.

@aquamansurfer 9 месяцев назад

Thanks a lot again for your thoughts Richard ! Any news i let you know!

@m3chanist 9 месяцев назад

@@RichardThompsonCA TPU gasket printing for engines is already a thing, they are oil, air and fuel resistant and good up to 100C. You can find several RU-vidrs already have content up on the very thing. Direct drive is desirable, but not absolutely necessary, it all depends on the shore hardness of the TPU you use.

@canadarocks3809 10 месяцев назад

Is the finished gasket food grade?

@RichardThompsonCA 10 месяцев назад

Good question. I'm not really sure. This is the SDS sheet for the product: msdsdigital.com/system/files/ALUMILITE%20FLEX.pdf . It doesn't explicitly state one way or another. So I'm not sure. When I search for "is urethane elastomer food safe" I get this: "Polyurethane is resistant to mineral and vegetable oils, and aromatic hydrocarbons, making it a perfect choice for food grade applications." I've read that platinum silicone is food safe, but I think that would be way too soft for a gasket like this. I recently switched from the flex 60 to flex 80, it actually seals better when it's harder.

@SONO4B11T 10 месяцев назад

How well can this rubber deal with solar radiation ? I want to make gaskets for a kit car.

@RichardThompsonCA 10 месяцев назад

You'd have to contact the manufacturer (Alumilite) to get that information. It doesn't say anything about that on the label or in the SDS.

@tman3944 6 месяцев назад

Rich, can you provide the links for all the products you used to copy gasket?

@RichardThompsonCA 6 месяцев назад

Sure, mold max 30 silicone: sculpturesupply.com/products/mold-max-30. Alumilite flex urethane: plasticworld.ca/product/alumilite-flex-80-32-oz/

@tman3944 6 месяцев назад

@@RichardThompsonCA thanks, I'll keep that in mind. I'm trying to get a seal for a Stanley food jar. I just purchased an oring for it. If the oring doesn't work, I'll make a seal copy by the procedure you did.

@RichardThompsonCA 6 месяцев назад

@@tman3944 I hope the oring fits, you'll probably have to spend ~$100 on silicone and urethane to reproduce that gasket. These supplies aren't cheap.

@tman3944 6 месяцев назад

@@RichardThompsonCA if that's so it would be better to just get a new jar

@Crvmbs Год назад

what program @ 1:48? Thanks!

@RichardThompsonCA Год назад

That's Modo, you can find it at www.foundry.com.

@stephencuyong Год назад

name of chimecal raisen and how buy

@RichardThompsonCA Год назад

The gasket material is a urethane elastomer called Flex 60, it's made by Alumilite. I get it here in Canada from a company called Sculpture Supply.

@miikeV33 Год назад

I tell you what, if you started making waterproof gaskets for battery compartments on e scooters, you'll make a fuck ton of money as there's a high demand for e scooter owners to waterproof their expensive purchases.

@RichardThompsonCA Год назад

It's a great idea, but the problem with something like that is you need access to the actual machines to test fit and iterate different designs. Thanks for watching!

@Anton-zb9dc Год назад

The first method was great, but I haven't seen you created air vent on other side for air to escape. It could be placed on the top

@RichardThompsonCA Год назад

If you look closely at it you'll see the air vent is actually right next to the filling port (it's smaller) . My idea was that the silicone would make a full lap and come back around to vent, making a compete loop. I thought if I put the vent on the other side it would just fill half the mold.

@Anton-zb9dc Год назад

@@RichardThompsonCA but as you can see on the video then this ait vent gets filled everything messes up. Put it on the opposite side

@RichardThompsonCA Год назад

@@Anton-zb9dc It wasn't the air vent getting filled that caused the problems, it was the viscosity of the silicone being too thick causing too much pressure. The silicone would squeeze out of the mold before it even got to the vent.

@Anton-zb9dc Год назад

@@RichardThompsonCA, ok, but I encourage you to lern more about infusion and rtm, the principles are the same. There could be suction on the other side while silicone gets injected

@RichardThompsonCA Год назад

@@Anton-zb9dc I certainly plan on coming back to injection molding in the future. I bought a 3 ton arbor press to convert into a home made bench top machine (future video project). For the purpose of making gaskets for my projects though I don't think it's the way to go. I find that due to shrink of the resin during curing and stretch of the urethane rubber during fitting I have to make several sizes to see which ones fits best. Doing multiple iterations with these 3d printed molds turned out to be far more labour intensive than I expected conpared to casting. Also I have to use a very slow curing silicone. The urethane I use for casting sets up in 4 minutes which isn't enough time to do it with injection. Maybe if I get the arbor press working and I can find a thermoplastic that's more rubber-like it would work. Also, I don't know how well resin molds will stand up to the clamping forces I would need to eliminate flash.

@thenamenotavailable 11 месяцев назад

There’s so much easier ways to do that. I can’t believe you went through so much trouble.

@TheRealJavahead 10 месяцев назад

Are you going to let us know the better way to do it?

@tylerreeves8026 10 месяцев назад

@@TheRealJavaheadyeah I'd really like to know too! Lol

@v8sholife401 Год назад

Can you make a valve cover gasket if so text me

@RichardThompsonCA Год назад

The limitation is the size of the gasket. I have to be able to print it on my resin printer and I think a valve cover gasket would be way too big. Also it would have to be a pretty rare gasket, I'd estimate the block of silicone you'd need for something that size would cost you a $100 at least. Usually valve cover gaskets are a lot cheaper than that. I've made valve cover gaskets in the past with a tube of RTV sealant, they don't need to keep in a lot of pressure.

@-______-______- 29 дней назад

Great vid. Please consider using real music as opposed to the free stock music. It makes a huge difference to the quality and doesn't put musicians out of a job.