A peg on the back of the mount with a ball end, going into a cup on the plastic mount, could be a good way to mitigate the twanging vibrations without losing the absorption you already have. Also having a thinner lip around where the mould halves meet could help with sealing, as it would increase the pressure around the split line, preventing the silicone squeezing out quite as easily. I'd expect 1-2mm (~1/16"?) to be a good starting point, that could be tuned. Alternatively, having a lip on one side that keys into the other half would also help prevent leakage.
Great content as always, 3D printers were firstly used for prototyping. With it‘s democratization a lot of people tend to forget that and rush to ready made model forgetting it’s designer probably had a bunch of iterations to get there. Anyway great design, so great it makes me want to buy an insta 360 to do the same. I’m sure lot of people would be happy to get their hands on your design ;-)
A couple of suggestions to help with future molds: Viscous fluids will not go all the way through thin tube due to surface tension. Thin vents are often used to allow air to escape from hot plastic injection molds, while still being too small to allow the injected material to escape. Smooth On has a lot of data on their products and may be able to let you know what size opening to use Building on the lack of capillarity mentioned above, you can put in a keyed barrier around the part, and it will often reduce the amount of material lost due to a poor interface with the surfaces. If nothing else, it allows you to redirect the flow of excess material. This is often used to keep hand made block poured silicone molds from leaking.
Good tips but in this case I want the vent to allow silicone flow to encourage air evacuation. I specifically do not want the vent to prevent silicone from rising through. If I were working with the pressure involved in true injection molding I might go that route...but in this case it's incredibly low pressure so there is heavy reliance on flow through air evacuation. You need the vent reservoir above the mold level to have silicone in it to replace air that's worked its way out over time. This is very similar to how smooth on details a lot of their resin molds. Both the vent and fill are above the mold because you're relying on hydraulics over high pressure.
@@EngineeringAfterHours I agree tpu is more rigid and silicon would be better for vibration dampening and even feel softer. Have you tried printing tpu with minimal infill, even 1%? It can get pretty squishy:). I think impact resistance would be somewhat similar. Both tpu and silicone are used widely in the phone case industry (according to the first random google result that fit my line of thinking:) here’s an unpublished 10 sec video of a squishy part I did. ruclips.net/user/shortsd2Sogmh0xvo?feature=share Excited to see more of your content. It’s very well done.
I wonder if anyone has tried to use a machined aluminum mold base (for clamping tight using screws so there's no leakage), and then just 3d printing inserts for the part itself (which can still be iterated).
Formlabs has a lot of info on this. It's a great option to save on print time and get the structure of aluminum under actual injection molding pressures.
This is neat and learned something new today. Didn't know PLA prints could be used for creating silicon molds. Can you share some info about that camera?
If I recall correctly it was just a modal analysis. I was doing that to ensure the natural frequency was low enough to be within the bandwidth of image stabilization
Great video. Maybe I missed it but what type of 3D material did you use so as not to cause cure inhibition with the silicone (assume you are using Platinum silicone) ?
It's been a long time but it was most likely what dremel calls eco-abs which is just impact modified PLA. I believe you're correct in that it's platinum cure. I rarely use anything else.
3 questions: Have you thought about using ABS for the molds and acetone smoothing? Could give you a really nice surface finish. Your finish looks pretty good as is but just wondering. If you had a longer inlet gate would the added head pressure help with the voids? Which type/brand/etc silicone do you recommend?
1 - No, my printer doesn't do ABS but that's a great idea. 2 - yes, a longer inlet can feed more as bubbles raise to the vent. 3 - I use smoothon because they have a ton of knowledge and documentation available as well as good product support.
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I can't believe you are still below 100k subscribers. Incredible content every single time.
Thanks! Hopefully we get there soon...its hard to tell with youtube because things can get picked up at random.
These videos deserve more traction! You've earned a subscription.
Thanks!
Great video. Very useful tips. Thanks for sharing. Fun to see this kind of innovative engineering using RC products.
A peg on the back of the mount with a ball end, going into a cup on the plastic mount, could be a good way to mitigate the twanging vibrations without losing the absorption you already have.
Also having a thinner lip around where the mould halves meet could help with sealing, as it would increase the pressure around the split line, preventing the silicone squeezing out quite as easily. I'd expect 1-2mm (~1/16"?) to be a good starting point, that could be tuned. Alternatively, having a lip on one side that keys into the other half would also help prevent leakage.
Bro you're the coolest I love this channel! Perfect combination of RC and just plain genius creativity. You are one hella knowledgeable dude
Thank you for the kind words!
Great design and great video! Subscribed!
Love the content and glad I found the channel. Keep up the good work!
Very Cool! I only wish I had your skills designing things like that in CAD
Great content as always, 3D printers were firstly used for prototyping. With it‘s democratization a lot of people tend to forget that and rush to ready made model forgetting it’s designer probably had a bunch of iterations to get there. Anyway great design, so great it makes me want to buy an insta 360 to do the same. I’m sure lot of people would be happy to get their hands on your design ;-)
Excellent!
A couple of suggestions to help with future molds:
Viscous fluids will not go all the way through thin tube due to surface tension. Thin vents are often used to allow air to escape from hot plastic injection molds, while still being too small to allow the injected material to escape. Smooth On has a lot of data on their products and may be able to let you know what size opening to use
Building on the lack of capillarity mentioned above, you can put in a keyed barrier around the part, and it will often reduce the amount of material lost due to a poor interface with the surfaces. If nothing else, it allows you to redirect the flow of excess material. This is often used to keep hand made block poured silicone molds from leaking.
Good tips but in this case I want the vent to allow silicone flow to encourage air evacuation. I specifically do not want the vent to prevent silicone from rising through.
If I were working with the pressure involved in true injection molding I might go that route...but in this case it's incredibly low pressure so there is heavy reliance on flow through air evacuation.
You need the vent reservoir above the mold level to have silicone in it to replace air that's worked its way out over time. This is very similar to how smooth on details a lot of their resin molds. Both the vent and fill are above the mold because you're relying on hydraulics over high pressure.
I’d love to see a video comparing silicon mold making vs printing with tpu.
Tpu is much stiffer so it's not really a comparison. It's a totally different material for a totally different application.
@@EngineeringAfterHours I agree tpu is more rigid and silicon would be better for vibration dampening and even feel softer. Have you tried printing tpu with minimal infill, even 1%? It can get pretty squishy:). I think impact resistance would be somewhat similar. Both tpu and silicone are used widely in the phone case industry (according to the first random google result that fit my line of thinking:) here’s an unpublished 10 sec video of a squishy part I did. ruclips.net/user/shortsd2Sogmh0xvo?feature=share
Excited to see more of your content. It’s very well done.
Great Video Bro! This helped me alot.
if you made mounting arms off the sides to reduce the jello (vibes)
I wonder if anyone has tried to use a machined aluminum mold base (for clamping tight using screws so there's no leakage), and then just 3d printing inserts for the part itself (which can still be iterated).
Formlabs has a lot of info on this. It's a great option to save on print time and get the structure of aluminum under actual injection molding pressures.
This is neat and learned something new today. Didn't know PLA prints could be used for creating silicon molds. Can you share some info about that camera?
It's the insta360 go 2
What was the simulation for the vibration you made?
What have you checked?
If I recall correctly it was just a modal analysis. I was doing that to ensure the natural frequency was low enough to be within the bandwidth of image stabilization
Great video. Maybe I missed it but what type of 3D material did you use so as not to cause cure inhibition with the silicone (assume you are using Platinum silicone) ?
It's been a long time but it was most likely what dremel calls eco-abs which is just impact modified PLA.
I believe you're correct in that it's platinum cure. I rarely use anything else.
why not use tpu?
It is much firmer.
3 questions:
Have you thought about using ABS for the molds and acetone smoothing? Could give you a really nice surface finish. Your finish looks pretty good as is but just wondering.
If you had a longer inlet gate would the added head pressure help with the voids?
Which type/brand/etc silicone do you recommend?
1 - No, my printer doesn't do ABS but that's a great idea.
2 - yes, a longer inlet can feed more as bubbles raise to the vent.
3 - I use smoothon because they have a ton of knowledge and documentation available as well as good product support.
@@EngineeringAfterHours got it thank you