Hey bud, I enjoy your videos, I do production pour casting for a family owned urethane business in NE PA. When we have an open top mold, I just fill it it a little over and either scrape a Ross the top with a good putty knife/drywall tool or use a block of steel/aluminum and slide it across the top of the part. It works very well. You just have to use a smooth continously motion. What you are left with is just regular flash. For some molds we even cast in guide rails for the purpose of the final sliding piece. It is occasionally possible to get a bubble with the slide top method, but a quick dremel of the surface and a dab of material after initial demoldis all it takes to fix it. Good luck and ty for the content as it is also something I do as a hobby. P.s. is it strange that when I'm off work I'm spending any amount of spare time watching you do the same/similar thing haha.
@EricStrebel2 жыл бұрын
Cool, thanks for the tip
@vasyapupken2 жыл бұрын
you can control free surface of a one part mold quite easily. just cover it with glass or any flat piece with release agent on it. this requires only slight change in the mold itself - mold bottom (top) needs to be flat as well so no plastic cups )
@davefloyd94432 жыл бұрын
Can you explain that a bit more please? Are you saying to build the box on glass bottom sheet?
@EricStrebel2 жыл бұрын
I believe what he is saying that the top of the mold just needs to be flat so that you can put some release agent on a piece of glass and when you pour your part, Just slap the glass on top of it so that it comes out flat once it's cured.
@davefloyd94432 жыл бұрын
@@EricStrebel Hi Eric! Thanks. I mold little flat bottom fishing baits in an open topped mold (bottom of mold case). I've been gluing the flat side of the master to pieces of smooth, plastic laminated shelf and building the box up from there. Just cant get a flush "top" because silicone leaks up to the glue line, causing thin flashing. Looking for a cleaner finish really.
@EricStrebel2 жыл бұрын
That's why I make all my molds as two part molds, and almost never as open face mold because you can't control that top surface when it's an open face. Simple as that.
@davefloyd94432 жыл бұрын
@@EricStrebel Yep I've been coming to that conclusion myself after watching your channel. Trouble I have with that is that when laid flat some of the fish and worm masters are less than 10mm high, making for very thin molds. They are sort of fat ballpen sized. Should I look at molding these vertically?
@TalkingGIJoe2 жыл бұрын
I make almost all my molds using that plastic cup open face method. Works really well for small pieces. Any issues I've had were related either to materials mismatch or improper mixing.
@WestKyCrime2 жыл бұрын
Eric, Really good production values - camera work, voiceover, detail shots, discriprion, and of course, your the content is spot on! ⭐⭐⭐⭐⭐
@EricStrebel2 жыл бұрын
Thanks!
@3toedSloth753 ай бұрын
Epoxies do vary in scent, viscosity, and curing times by quite a lot. But a common trick to cure epoxies faster is to use heat (usually, per the material SDS supplied with the resin). So turn on the heater on your pressure pots and you can usually remove it in a few hours. The thing I can't stand is the mekp and styrene off gassing from polyester resins like those used for fiberglass parts.
@GlitterIsland2 ай бұрын
I use polyurethane casting resin for repairing vintage toys and figurine making, with silicone molds. I much prefer it over epoxy slow cure resins, the brand of polyurethane I use is "color pro" as it cures within 15 minutes to a transparent color, allowing me to mix pigments in for accurate coloring, it has no smell really. I use oil based pigments that are manufactured for use in urethanes, rubbers, and silicones like "so strong" or "ignite" by smooth on and find they are concentrated enough that just 1 drop will do the trick. Cannot use epoxy resin dyes with polyurethane, as the urethane isn't forgiving when it comes to moisture. I like polyurethane resin because it gets all the fine details of my micro molds, due to its water like consistency and flow. I like the fast curing time, and the lower amount of air bubbles in my casts compared to traditional slow cure resins. A trick I use, is to mix the color I want with either part A or B so i can take my time to get accuracy, and then let it sit, before adding the two parts together, it allows for uniform mixing and color rather than adding color to both parts and then mixing. Edit: Forgot to add, a helpful tip: When molding an item with liquid platnium silicone, there is a trick to make gaps and holes or spaces on whatever you are duplicating with a mold easier. I use Vallejo satin varnish water thin acrylic paint meant for airbrushing miniatures and models, with a toothpick to fill the holes and gaps. It dries in about an hour and creates a film screen on wherever hole or gap it is placed. Then I can mold in the silicone, when the duplicate item comes out I can remove the filling where the gap is, because all it does is create a thin amount of flashing. The varnish is easily peelable/removable from the original figure or item. Also I utilize using a electronic hobby drill, and electronic nail art file with various fine tips to remove flashing, and fine tune certain areas. :)
@Pushyhog2 жыл бұрын
vids just keep getting better
@negotiableaffections2 жыл бұрын
Hi Eric, I'm always amazed by your solutions to the 'tricky bits' of mold making, e.g. the separate mold part for the delicate clip/prong part. My 'stupid' question (i'm a very small time, part maker with 0 budget) is, do you dispose of the syringes after one use or can they be cleaned of the resin? ..and if so, how?
@EricStrebel2 жыл бұрын
Resin comes right off. Does not stick to the plastic
@rbfour52 жыл бұрын
Great comparison video! I haven’t seen you post anything for a while and was getting concerned. But glad to to see you post. I’ll be sending you a project to quote for me. Thanks!
@LuxeonIII2 жыл бұрын
I do a lot of open face molds I make using machinable wax and a cnc , I set a flat piece on top after the pour that has a small hole to allow the resin to escape as the flat
@scottgray62763 ай бұрын
Would a flat piece of plastic or glass with release on it dropped over the opening of the mold eliminate the meniscus, giving the casting a flat, flush back, or reduce the excess resin to flash, instead of a lump?
@LIGOHOUSEАй бұрын
Hi, what glue you use for all the small parts you glued with the needle tip. Thanks
@Miatasun Жыл бұрын
hello, what kind of resin would you use for example automotive parts like a cam belt cover? I loved the trick at the beginning of the video, with that small clip moulding.
@EricStrebel Жыл бұрын
It really depends on the properties you want for your part. Check with your preferred resin supplier, they usually have tech support to help with that.
@jakethomas61239 ай бұрын
Found you today. I love your ideas!
@TM-rp7bd2 жыл бұрын
Just starting out here....if one was to take a typical 300 lb. capacity shop swivel caster wheel and try to repair the cracked and crumbled solid rubber tire over a metal hub.....using the original caster as the mold....... for a 1-time use, (assuming its stripped, cleaned, prepped, sealed openings with clay, plywood box, etc.), what is the best material and/or method for that kind of operation? I figure this might be a good project for a first timer never having worked with this stuff before. cheers. thanks
@EricStrebel2 жыл бұрын
Pretty complex, not something I would advise for a first casing project. Plus it's round and that is hard. Use polyurethane
@Pit4all2 жыл бұрын
Have you considered applying a thin coat of PVA on the rubber part before pouring the platinum silicone? form what i did in the past, its the safest way to guarantee the curing by addition in unknown resins and rubbers
@EricStrebel2 жыл бұрын
No, I have not considered it, as is would alter the size of the part. It would probably work though
@JSDudeca Жыл бұрын
There is a lot of confusion about Epoxy Foams vs other foams. Any chance you have any projects to test out various foams. The Tesla 4680 battery pack apparently uses Epoxy foam to achieve added stiffness.
@l0I0I0I02 жыл бұрын
Urethane or epoxy, which last the longest and how long? TY for the great vid!
@EricStrebel2 жыл бұрын
It depends on your application and environment along with final use. Check with the manufacturer specs for hardness UV and deflection, etc
@l0I0I0I02 жыл бұрын
@@EricStrebel Great work btw! Thanks for sharing your expertise!
@marcins55844 ай бұрын
What is the difference between urethan resin and polyurethane?
@EricStrebel4 ай бұрын
Same stuff
@morenovanbuynder49478 ай бұрын
i want to make a fender for a dirtbike so the part needs to be able to flex a little bit, what kind of resin would you advise for this application
@EricStrebel8 ай бұрын
Reach out to tech support at your favorite resin supplier for assistance. I recommend BJB enterprises
@artipose2 жыл бұрын
I wonder if one advantage of epoxy over urethane is its sensitivity to humidity? Isn't epoxy more resistant to absorbing water or moisture from the air?
@EricStrebel2 жыл бұрын
Correct
@brappineau4161 Жыл бұрын
this is very similar to the shape and size of the parts i need to make. do you take on clientele?
@EricStrebel Жыл бұрын
Yes, link in the description to the website
@Emanmonster132 жыл бұрын
great as always! I've done mold work for a while but always learns something new from you.
@ajfreeze2152 жыл бұрын
Great video! thanks for posting it! Could you maybe go over in more detail how the small part of the mold for the locking tab functions? Thanks again!
@aquamansurfer Жыл бұрын
i watched +10times and i still don't get how it's done, that little 3rd piece, ¿its unlocked from the mold and its putted before inject the epoxy/urethane? or how its done?
@mobayguy Жыл бұрын
Really impressive and answered my questions about resin vs. epoxy. New to this stuff so this is very helpful. Thx Eric - SUBSCRIBED
@EricStrebel Жыл бұрын
Awesome, thanks
@Whitburn.Surfboards7 ай бұрын
Is there a good way to reuse the syringe? Acetone or something to clean it?
@EricStrebel7 ай бұрын
Let the rein cure and remove the material
@EnergySeeker2 жыл бұрын
which Urethane resin, do you use ? and which is the best silicon ? thanks
@EricStrebel2 жыл бұрын
Usually listed in the description of the videos
@JeffroDH2 жыл бұрын
Can epoxy or urethanes replace PVC components say, in a swimming pool?
@EricStrebel2 жыл бұрын
In theory yes, make sure it's UV stable
@BMWEiV-Drivingaroundtheworld11 ай бұрын
Hi, what do you use to tin down the vaseline?
@EricStrebel11 ай бұрын
Naptha
@Jerry-672 жыл бұрын
hey there- what type of cardboard do you use? thanks- just looked - all good ..
@nerored62352 жыл бұрын
I think you and Robert Tolone would have some great discussions with each other an reviews of each others videos and techniques.
@S11-o9s2 жыл бұрын
hi eric, when i google epoxy resin the only thing show me is chair or table i didnt see casting sculpture using epoxy resin.could u explain that why?
@EricStrebel2 жыл бұрын
My guess would be because it's not generally used for that
@Decrypt_SymbolАй бұрын
Hi, I have a Honda Jazz. I want to manufacture a 24-tooth plastic gear for the side mirror myself. There are many chemical options available, but which liquid chemical should I use? I want to avoid the gear breaking while rotating, and I don’t want it to be affected by heat or cold. Please give me some advice, your fan is asking for your help.
@alexmordred5 күн бұрын
Unless you really cannot buy one, I'd look into FDM 3D printing (have it printed if it's a one time thing). I think it's much easier for small parts like that that don't need to have a smooth glossy finish VS making a two-sided silicone mold etc. Plastic gears are usually made out of nylon, which is kinda hard to 3D print but should be doable for a small part like that. Alternatively you could print that out of ABS/ASA (not as temperature resistant on the below freezing side but much easier to print).
@csq5304 ай бұрын
Hi can someone tell me what the THERMOSET thats used for the HOUSING of WATCHES like ARMITRON and TIMEX?
@jarrod-smith Жыл бұрын
Curious if you know whether you can use urethanes for things like kitchen utensils (things that will touch food or drink). The Google machine is failing me on this. I understand why folks (esp manufacturers) might be shy about making claims. It's probably ridiculously expensive to have things validated at FDA and even then, errors in end use can make it a huge liability for them. I see that some epoxy resins that use BPA have been FDA-approved for some food contact. Anyway, I would appreciate your expert input on this question. I have not really worked with anything but silicone, and even then only a few times.
@EricStrebel Жыл бұрын
The best way is to snag the manufacturer's data sheets and c if they meet your requirements, or chatting with them directly via their support either online or on the phone.
@lorenweatherby65209 ай бұрын
Hi, Just found your channel. I have a 1988 Toyota fj62 Land cruiser. The center dash bezel is cracked and brittle. What type of resin would be best to use to cast new one? have never tried molding anything before ....
@giangquangvinh64872 жыл бұрын
can you have a video where you explain more about the key seals in the silicon? Is it to hold the silicon mold in place? I see sculptors would often build a clay wall and make half spheres registration marks or sometimes they do zigzag line so the parts line up. This video is where i first see this method so i would like to find out more. Or where can i read more about it? Thank you
@EricStrebel2 жыл бұрын
Made it up actually, all the other methods you mention are pre laser. You need a laser or a way to make a digital key for this to work. Yes the key seal hold the two halfs together. Almost every video in the last 2 years of mine used this technique in some way shape or form
@giangquangvinh64872 жыл бұрын
@@EricStrebel how interesting to even think about the history of moldmaking itself, and also how artists and product designers make molds for their works also fascinates me as i'm learning right now
@sonotover Жыл бұрын
Can I send you a small part to have cast in resin? I'm working on a 1/12 scale motorcycle and the kit has a missing part. I ordered another kit so I can use the part to cast a spare.
@garagemonkeysan2 жыл бұрын
Great video. Super informative. Can't wait for Smell-O-Vision comes to KZbin. Mahalo for sharing! : )
@TheRealJerseyJoe2 жыл бұрын
Superb work as always Eric ! BTW - Pour low, vent high.... wasn't that a song by Yes? ;-) LOL !
@EricStrebel2 жыл бұрын
Hahahah
@sameriraq69 Жыл бұрын
so thes is bakalite?
@Beetletreuse2 жыл бұрын
What is the brand of the white pigment that you use? I've been researching for a good opaque white that doesn't have major issues with the resin curing. I'm trying to compile a list of some to try. Does it take a lot of pigment to get a good opaqueness? Or does a little go a long way?
@timothybillingsley67162 жыл бұрын
Good content, great video, seeing the comments leads me to believe that a post about where to source the products would be helpful.
@EricStrebel2 жыл бұрын
Check the description below the video, many of the products supplies and tools are listed there.
@benargee2 жыл бұрын
I think you should get a fume hood for any noxious chemicals in your shop.
@Iridium1O2 жыл бұрын
What brand was the tin cure silicone ?
@Made2hack2 жыл бұрын
Hey Eric, great video as always. Can you please recommend a pigment for the epoxy? I've never had good luck with coloring my epoxy resins. Thanks!
@EricStrebel2 жыл бұрын
You should be able to use any pigment that you use for urethane resins, so any alcohol or dry pigment should work
@charleselkins45462 жыл бұрын
Very nice. You make its seem so simple but I know its just not so. What were the brass tubes you were using?
@charleselkins45462 жыл бұрын
Sorry, I see the link for the brass tubes in the notes to your video. Thanks.
@kitingmare2 жыл бұрын
I remember infusing molds for the carbon fiber parts of the Formular Student Car at my Uni. But the Epoxy there was rather thin, so might be worth a try to use some infusion resin instead of the thick one you used ? Other than that great video and an interesting mold!
@michaelc2321 Жыл бұрын
Was is a special type of epoxy resin you used for resin casting? Was this for making a 2 part compression mold?
@briancruz3551 Жыл бұрын
I dont get what is that black rubber stopeer used for. Can someone explain
@EricStrebel Жыл бұрын
it's explained in the video in the beginning
@mattmeyer64712 жыл бұрын
What was your total cost to make the part? I have a project about that size and trying to determine if its worth it to go the injected molding route or another route.
@MordecaiV Жыл бұрын
I would be a little worried about the clip function in that epoxy instead of PC/ABS original part. Seems like it worked out ok, though.
@briancruz3551 Жыл бұрын
I dont get what is that black rubber stopeer used for. Can someone explain
@TheGnthreman2 жыл бұрын
You prefer tin or platinum silicone?
@EricStrebel2 жыл бұрын
Tin cure
@GastonLAU2 күн бұрын
Hi Can I send you a project?
@EricStrebelКүн бұрын
Yes, link in the description
@KRGraphicsCG2 жыл бұрын
Using cardboard for keying is pure genius, versus dealing with the mess of modeling clay and marbles for registration keys
@EricStrebel2 жыл бұрын
Thanks
@KRGraphicsCG2 жыл бұрын
@@EricStrebel only part that will suck for me is not having a laser cutter (which is super cool btw). I could use MDF, and my Dremel tool to cut out a mould, but I would need a steady hand
@EricStrebel2 жыл бұрын
Sort of the beauty of having a laser. It has totally changed the way I build models
@KRGraphicsCG2 жыл бұрын
@@EricStrebel 😁 and it's just super cool. LASERS!!! 😁😁😁😁
@VinokDesign2 жыл бұрын
Man Eric, your detail of mold production is amazing. got some very nice epoxy s here in Europe, some very liquid. Some long cure times. But I got the inverse experience, the urethanes smell like .... For days and the epoxy is almost totally odourless. Of course use a VOC meter to know what the air quality is. maybe I can send you the websites, they even have extra uv stabilizers that you can add. Iff I have some time I will even make a video of it. And send it to you. Greetings from Belgium
@EricStrebel2 жыл бұрын
Rampf resins, German company
@VinokDesign2 жыл бұрын
@@EricStrebel thank you
@medarfoul20084 ай бұрын
really artistic work i appreciate
@goguyted2 жыл бұрын
Can you post a link to the brass tubing please?
@EricStrebel2 жыл бұрын
Added
@RazDesignAB2 жыл бұрын
this stuff are great! Keep it going!
@Adrian-wd4rn2 жыл бұрын
Silly request, but, making a face mold would be kind of a fun tutorial.
@EricStrebel2 жыл бұрын
Stay tuned!
@T1g3rch3n2 жыл бұрын
For some Reason I can't find any Naphtha in Europe... Do you have a alternative for thining Vaseline?
@Tarbard2 жыл бұрын
White spirit
@EricStrebel2 жыл бұрын
You can try dish liquid and isopropyl as an alternative
@T1g3rch3n2 жыл бұрын
@@EricStrebel I'm not sure if 'Cleaning Gasoline' is the same as Naphtha o_O I'll try both Cleaning Gasoline/Naphtha and Dish soap and IPA
@michaelneal900 Жыл бұрын
Id have just taped the batteries in or the old cover. lol
@roryleitner1532 Жыл бұрын
How much did this cost the client?
@EricStrebel Жыл бұрын
Probably in the 400-500 range....
@roryleitner1532 Жыл бұрын
@@EricStrebel about how many pieces were made?
@EricStrebel Жыл бұрын
Perhaps around a dozen parts
@roryleitner1532 Жыл бұрын
@@EricStrebel so about 37.50 per battery cover. Amazing.
@ecsyntric2 жыл бұрын
this obviously has to be injection molded HDPE, ABS or some thermoplastic. for prototyping PU seems fine. aa we know thermosets cannot be re/upcycled
@cryptid-artha2 жыл бұрын
I have used Naked Fusion, the Deep Cast is very fluid. The art formula is a lot thicker, but it's meant more for creating art so it's supposed to hold its shape. It takes a long time to cure, but has little to no odor in my experience
@NiclasGudmundsson2 жыл бұрын
Ohh, that was the thickest epoxy I've seen so far. I'm making carbonfiber parts and use epoxies often. I you easycomposites epoxy but they are in the UK. Try to contact composites envision in the US, I think they can set you up. The epoxy from easycomposites doesn't smell anything.
@vasyapupken2 жыл бұрын
as for smell here is a thing. epoxy can smell really bad but this smell is not so harmful. it just smells bad and that's all. polyurethane vapors on the other hand are barely noticeable. but they are straight up poison (isocyanate). so please wear proper safety equipment in any case.
@US-vy8up2 жыл бұрын
thank u
@EricStrebel2 жыл бұрын
You're most welcome
@Pushyhog5 ай бұрын
do short vid on pouring in scale with lil math please
@ahmedhassan-xv5ei2 жыл бұрын
very nice work
@EricStrebel2 жыл бұрын
Thanks
@billfoster68096 ай бұрын
You're a pro at this! and I enjoyed your video. I just wish you would have shown us what the small silicone mold piece did for the overall mold and how it went together. And did it create additional flashing pieces ?
@daysdesigns2 жыл бұрын
I make epoxy countertops using Stonecoat Epoxy. They have several different types... check em out.
@FighterDoken8 ай бұрын
Recommendation: Use casting urethane instead of silicone. It doesn't have the issues with inhibition.
@ronprince14784 ай бұрын
Thanks, still learning at 66
@EricStrebel4 ай бұрын
Absolutely!
@erickkadbay10 ай бұрын
Genial 🎉
@alaingombertchabri29707 ай бұрын
Otto Waalkes is an amazing dude !
@johnnydfred2 жыл бұрын
WEST system epoxy? Not smelly, thin 5:1. Two different set times. Dunno, just suggesting.
@EricStrebel2 жыл бұрын
Thanks!
@sinnombre54662 жыл бұрын
Cobra Kai?
@StasonKalbason Жыл бұрын
Молодцом!
@daniellec2172Ай бұрын
When in the video is epoxy vs urethane explained? Bit of a bait and switch with that title ;)
@Mtlhed10992 жыл бұрын
Subscribed at "sure as shit."
@mostafamersal21862 жыл бұрын
First viewer
@bassome3000ify2 жыл бұрын
Sorry but you get an inverted thumb down
@EricStrebel2 жыл бұрын
Let me know why, that helps me understand your feedback
@matt-lang2 жыл бұрын
Eric, check out InhibitX. It’s a super low-viscosity inhibitor for plat silicones and I use it on any materials that I haven’t already tested with plat silicone and it works well without affecting most finishes
@EricStrebel2 жыл бұрын
Cool
@rossmain9120 Жыл бұрын
Excellent video, great insights. Brilliant work also. This channel now a firm favourite. 🫡
@EricStrebel Жыл бұрын
Thanks
@LockStoppageSandwich Жыл бұрын
My neighbour absolutely stinks so I hear what you are saying re the obnoxious smell and the need for correct PPE 😂