Nice demo on the tinning. I heard my old man from the great beyond saying "only spin the wire brush in one direction." He would always tell us that if you rocked them back and forth it bends or breaks the wire in the brush as it changed directions. It doesn't matter which way you go just never change direction.
Bullshit. I always go back and forth and still have the same wire brush cleaner from like 15 years ago. Which wouldn't matter anyway as they cost like $2
Oh hell yeah I too myself also learned 'tinning' just exactly how you yourself have so aptly demonstrated !!! Thanks for sharing this kind sir !! I'm old school myself too - I've done all my soldering copper joints and butt joints using this exact tinning method almost 17 years. NEVER have I not a once yet ever had a single failure !!!
@@vogman couldn't agree with you more !! It's really one of those "if it ain't broke don't fix it" type sorts of realities in my opinion 😊 Have an outstanding day GOOD sir and may you receive many blessings in abundance !!!
Now you can check the gas level in your aluminium castings, just have a small (about 1/2 a cup) steel mould in the chamber fill the cup with molten aluminium immediately apply vacuum down to 0.1 atmosphere. Later slit the casting and clean up with abrasive paper to see how much gas you have - try different degassing methods and see what you get. Love the marshmallows are they nice and chewy afterwards?... Martin.
VegOilGuy using a electric Furness greatly reduces the amount of gas Ingres into the melt doesn't it? @olifoumdryman. Isn't the main cause of hydrogen from the waste gasses from the fuel combustion? The reason to use electric is it's much "cleaner"
You're quite right. I'm not the guru of course (Martin is), but I know Martin has mentioned to me previously that it's during the melting process that a lot of gases are introduced. As electric foundries are fairly sealed and don't rely on extra oxygen to achieve temperature, there should be less gases involved : )
Absolutely superb. I will be building a chamber myself. The beauty of it is that the principle remains the same regardless of the size or shape of the box needed as long as structural integrity is maintained. Excellent video, well done. Best of luck.
Did he get his XBox back yet🤣😂. Damn that’s a good tutorial and design I recon even I could do that and I struggle with the simplist of things🤔. Great work Geoff have a great weekend mate👍🏻🍻, I had to edit this as my stupid phone changes all my A’s to bloody S’s 🙄
Great to hear from you Bigstack. I have to make things simple so that I can do them : ) Don't forget to keep me in mind for a collab... always happy to work with good folk!
VegOilGuy No worries at all mate it will definitely happen I promise👍🏻. for the last month I’ve been uploading videos from my phone that I had done awhile ago as I’ve been so busy I haven’t even turned my furnace on, I just edit in the right date for the video each time.I am so busy at the moment I’m just glad I have a heap of videos left on me phone to upload until I get my stuff sorted as kids work sports wife life is just soo friggen hectic. Anyway enough excuses 😁👍🏻talk soon matey.
Ah well, family... nothing more important than that mate. I respect you for that. No worries and certainly no hassle. Just a friendly reminder that I'm happy and willing if ever you are : ) Take care of those little Ozzies mate and have a good one.
One belated alternative: while not perfect, a fast-and-dirty alternative to silicone rubber is foam mounting tape, sometimes sold as "camper mounting tape" or "foam rubber tape". It provides a surprisingly good vacuum seal for a low cost -- the biggest downside is that it only does so under compression. Not generally a problem for vacuum chambers, but can be tedious in other applications.
Thanks Koos. It's the size. Being small there's less air to evacuate. I looked at the containers I generally mix things in and they're usually quite small, so I thought - why built a big chamber? Small makes more sense. There's roughly 8 square inches of space inside and when you compare that to most things, they fit. If I ever need a bigger one, the same principles apply. I might need thicker sides to resist the pressure, but as long as it's air tight, it will work : )
I’ve just started watching trough your vids and don’t know if it’s been mentioned yet but if you don’t want to risk heat damage to electric vac pump find a refrigerant pump from a used window AC unit or refrigerator. (Window unit is normally better style). With a little searching its not hard to find one someone is throwing out. I use one to degas silicone and resin before casting, these pumps will draw close to -30 in Hg (normally -25 to -27)
I've just built one of my own and hopefully in a few days time I can start using it..........I just have to finish painting, install the silicone seal and plumbing, and I'll be good to go.
Update.......it's finished and it works, but on mine I had to add a 1/4" rubber seal on top of the silicone due to my acrylic top piece not being able to sit right on just silicone alone.
You, Sir, are an excellent teacher!!! Thank you for this video as for me............ now I can build one for wood stabilization! Regards, Jeff in Michigan
I taught a friend of mine to tin pipes, just as I do here. He went home, ripped out his bathroom, and renovated the whole thing. It's brilliantly simple, though obviously not the way the professionals do it. But for an amateur, it works! : )
I made my own using a lunch box. It's made out of glass, has a strong plastic lid and a rubber gasket around to seal it. I simply drilled a hole in the lid, inserted a pipe fitting that was screwed on from both sides with thin hex nuts and 2 o-rings in the middle. It's then connected to a vacuum pump and works great. It only cost me 5usd if excluding the vacuum pump.
great project , plumbing was spot on I think we might have shared the same dad i often wish mine was still with us to see this sort of thing , mine was a plumber too . thanks a lot for every thing and keep involving your son , he will thank you . tony t .
what paint did you use ? being made of wood it would have to be sealed properly so as not to draw air and moisture out of the wood I want to make a very large chamber for freeze drying foods stainless is very expensive wood is cheap and easy to work with I was thinking of sealing with resin but not sure what that would be like under full vacuum
Very nice build, welcome to the world of vacuum pressure. I hope in 2 years or so I'll be able to pick up and get stuff like this going again. until then I'm glad to have stuff like this to watch. I'll have to get a rebuild kit for my Welch Vacuum Pumps, I've got a DuoSeal pump to rebuild for a project that should be able to get below 0.001 Torr (that thing was quite the pocketbook breaker when I got it and it was discounted and in unknown shape... I don't have 220v in my garage so I don't know if it even works... maybe that was a bad buy, time will tell)
Thanks Walt. I doubt my home made chamber could achieve such impressive stats but it certainly is a bonus. I'm enjoying learning the benefits of owning such a tool : )
Subscribing now :) can I ask how this set up compares to the Kaya cast machine from Arbe? Obviously different but if I want to cast jewellery, will it do as good a job?
Interesting. How do you calculate how thick plywood you need for each suare inch? I want to build a bigger chamber and need to know how to avoid an implosion.
That's a bit mathematical and scientific for me. I'm more of a try-it-and-see guy, but it depends how much bigger you want to go I guess. My honest advice would be don't go too big unless you really beef things up.
I like the video, however, I think with a little extra plumbing, maybe a cross instead of a tee, (or another tee) the vacuum gauge could be attached between the valve to the pump and the vent valve so the acrylic top needn't be compromised.
I could smell the sawdust, gas and silicone. I wasn't even there. Aaaahhh. Anyway you sound local and me and my mate are quite crafty and are trying to make a plastic dome. This might be useful
Looks great! While back i did something like that with a Solid heavy Shoe box. That work boots came out of it. I thought. I wonder if this work to make a vacuum chamber. Took duck tape! Shoeboxs. Cut out the hole for my nozzle vacuum cleaner. Glue and tape it. It worked i mean if you doing resin . Work for that and it did. But for the real McCoy. Yeah you go the extra mile to build something like that or any other vacuum chamber pot! I have and old air compressor small one. In future attempts to make one. From old small Compressor.
Great video. I have a vacuum pump but was wondering what else I could use for my dome cause my dome is too small. Was concerned that the pressure would break glass, but apparently that is not a problem Thank you.
Hi Laura. Flat glass might be a little brittle. Traditional vacuum chambers used rounded glass which has more strength. Here I've used thick clear plastic. It's holding up great : )
Try - vacuum distillation. Boiling points of water and ethanol drop as pressure drops. Ethanol will always boil lower than water. If the pressure drops enough, you can distill ethanol at close to room temperature.
Ayup chap. Nice demo fella, very impressive. Keep it simple aye? Got a feeling I might be making one of these, albeit maybe slightly larger. Thanks mate.
Size doesn't matter really mate, just remember to scale up the strength as well. I got away with 18mm plywood as my box was quite small. Vacuum chambers are surprisingly powerful, so thicken and strengthen as you enlarge. As long as things are air tight, you'll be fine : )
You'll notice I had a small gauge on mine. You'd need to get specific data from the company whose product you're using about how much vacuum is required.
Can you make vacuum insulated panels with this? How would you seal the vacuum? You need to (1) create the vacuum, (2) seal the envelope/bag, (3) open the lid. How do you do step 2 before step 3?
I've been looking into vacuum chambers (and pressure chambers as well) for casting silicon. Do you think a similar build with a different lid and lid fastening method might be able to hold pressure as well? It'd be awesome to be able to have a single device to fill both needs.
I think there's countless ways of doing this. My demo here was to show what could be done with spare, cheap parts. As long as it's a strong, non-porous construction, it should work : )
I really wish there was a comprehensive materials list. The parts for the plumbing, pipe ID and OD, what kind of flux, etc. I'm out of my element but I'm willing to givei t a go.
Nice job showing how simple it can be. Making a VC has been on my to-do list for too long and this gives me inspiration. Just a ? or 2 * why did you use a plank lined with foil to form the silicon seal instead of simply using the plexiglass top? * why did you put the vacuum gauge in the plexiglass lid rather than on a "T" just upstream of the close off valve? These ?? are not criticisms, just curious. And then a tip (which you probably know about but someone else might not. * Silicone tubes are notorious for hardening up once they have been used once. To stop it happening, take a small piece of aluminium foil and smooth it over the end of the opening before screwing the cap down over it. (You need to screw the foil well into the threads). Since I learned of this I have never had a tube dry up on me and I have some that I've been using in dribs and drabs for more than 5 years * when finished using it, leave the waste silicone in the screw on nozzle. Leave it to thoroughly set and pull it out with long nosed pliers. Trim off the small end. Makes a beaut ear plug. * keep the old nozzles and cut them off at different lengths so you have a set with different opening sizes.
Thanks for the questions and the tips : ) Answers... 1) I used wood so I could have a hole in it, encouraging the silicone to go off 2) Just a personal choice : ) All the best.
Nice job, where you have those air inlet holes, I am going to put a fitting so I can fill it with a gas like co2, so I can test some sodium silicate sand mixtures.
I suppose it would depend on the thickness of the chipboard. I used 18mm (3/4 inch) plywood and that's plenty strong enough for a small chamber like I built here. But chipboard generally isn't as strong as plywood. Plus is fairly porous in its structure. Personally, for the small amount involved here, I'd stick with plywood. You can generally buy off-cuts very cheaply and that's enough for a project this size.
It depends what you're using the vacuum pump / chamber for. With metal cast, for example, I was surprised just how little vacuum was needed to make a significant difference - I mean, a plastic, homemade hand pump! And yet it worked. But I've no doubt other materials would behave differently.
This video actually makes me go out and build one! Question: Does the vacuum gauge reach all the way through the arcylic? I'm assuming you also used a bunch of expanding glue.
The hole for the gauge goes all the way through, yes. As for expanding glue, not much really. It's best to have good tight joints and any good wood glue would help with that : )
Thank you for your epic videos. I was wondering what other ways there are to slowly melt the wax out of the investment without using a foundry? Thanks legend
Melting the wax out is easy really. An ordinary kitchen oven can do this and typically 80C or so is enough. 100C will certainly do the job. However, we can't be certain ALL the wax has gone. Traces can remain. These burn away cleanly at much higher temperatures. Also the plaster itself needs the heat to properly prepare it for vacuum casting. I hope this helps 😁
I was thinking: do you reckon it'd be possible to use a normal 12 V compressor to draw a half-decent vacuum by mounting it inside the chamber and having it pump out to the atmosphere? At one point I had a chamber made of a big pot that I had planned to try this with but before I got everything together to try it I ended up moving and it got left behind somewhere.
How can we seal a vapor-impermeable bag/envelope around an object so that we can take the object out of the vacuum chamber and the vacuum seal remains? Ideally the bag would be transparent but aluminum foil could be okay.
There is also a product known as tinning flux that has a bit of solder mixed in with the flux itself so that you simply have to heat the pipe and apply the flux and it tins the copper
Just as a thought, with the proper silicon seal etc, would there be anything stopping you using a metal top with a hole cut out of it to put a perforated flask into?
Same thing I'm wondering,I'm just gonna order me a Aluminum pot and make my lid out of glass & find or make a fitted gasket to help with suction,I saw that on another video.
Your pipe-soldering skills are top notch.
I learned something new. 👍🏻
Glad you enjoyed it
Nice demo on the tinning. I heard my old man from the great beyond saying "only spin the wire brush in one direction." He would always tell us that if you rocked them back and forth it bends or breaks the wire in the brush as it changed directions. It doesn't matter which way you go just never change direction.
Nice tip. I've not heard that one before : )
👍 Dad's right on that! 😉
Bullshit. I always go back and forth and still have the same wire brush cleaner from like 15 years ago. Which wouldn't matter anyway as they cost like $2
Oh hell yeah I too myself also learned 'tinning' just exactly how you yourself have so aptly demonstrated !!! Thanks for sharing this kind sir !! I'm old school myself too - I've done all my soldering copper joints and butt joints using this exact tinning method almost 17 years. NEVER have I not a once yet ever had a single failure !!!
The old ways are so often the best ways. Tinning is a slower approach, but it's rock-sold in reliability : )
@@vogman couldn't agree with you more !! It's really one of those "if it ain't broke don't fix it" type sorts of realities in my opinion 😊
Have an outstanding day GOOD sir and may you receive many blessings in abundance !!!
That’s a great tutorial that has answer many many questions I had about this topic. Thanks for putting it together.
Subbed. You taught me something useful with the soldering pipes.
Amazing skills and presentation! Thanks for the exquisite humour as well.
Lovely video! Enjoyed all the puns thanks a lot!
Now you can check the gas level in your aluminium castings, just have a small (about 1/2 a cup) steel mould in the chamber fill the cup with molten aluminium immediately apply vacuum down to 0.1 atmosphere. Later slit the casting and clean up with abrasive paper to see how much gas you have - try different degassing methods and see what you get. Love the marshmallows are they nice and chewy afterwards?... Martin.
More tips from the master!!!
Thanks for that Martin. It's not something I would have ever thought of - or even knew about.
VegOilGuy using a electric Furness greatly reduces the amount of gas Ingres into the melt doesn't it?
@olifoumdryman.
Isn't the main cause of hydrogen from the waste gasses from the fuel combustion?
The reason to use electric is it's much "cleaner"
You're quite right. I'm not the guru of course (Martin is), but I know Martin has mentioned to me previously that it's during the melting process that a lot of gases are introduced. As electric foundries are fairly sealed and don't rely on extra oxygen to achieve temperature, there should be less gases involved : )
Thank you for sharing, I need this
VOG you remind me of my father too...he also taught me this method of soldering copper pipe and fittings...thanks great videos
That's nice to hear. Thanks : )
My dad did too
Great Stuff! luv the humor!
I was looking at vacuum sealing jars of dried beans and this came up... quite like the tinning trick.
Trust me, the tinning thing works brilliantly. 😁
Mother in law! lol. And the weee at the end, priceless.
Absolutely superb. I will be building a chamber myself. The beauty of it is that the principle remains the same regardless of the size or shape of the box needed as long as structural integrity is maintained. Excellent video, well done. Best of luck.
Thanks very much. 😁😁😁👍👍👍
This video was very informative. Thank you. Will definitely be trying this out. Love those pop up comments too. Wish I had the Dog's union growing up.
Me to : )
Did he get his XBox back yet🤣😂. Damn that’s a good tutorial and design I recon even I could do that and I struggle with the simplist of things🤔. Great work Geoff have a great weekend mate👍🏻🍻, I had to edit this as my stupid phone changes all my A’s to bloody S’s 🙄
Great to hear from you Bigstack.
I have to make things simple so that I can do them : )
Don't forget to keep me in mind for a collab... always happy to work with good folk!
VegOilGuy No worries at all mate it will definitely happen I promise👍🏻.
for the last month I’ve been uploading videos from my phone that I had done awhile ago as I’ve been so busy I haven’t even turned my furnace on, I just edit in the right date for the video each time.I am so busy at the moment I’m just glad I have a heap of videos left on me phone to upload until I get my stuff sorted as kids work sports wife life is just soo friggen hectic. Anyway enough excuses 😁👍🏻talk soon matey.
Ah well, family... nothing more important than that mate. I respect you for that.
No worries and certainly no hassle. Just a friendly reminder that I'm happy and willing if ever you are : )
Take care of those little Ozzies mate and have a good one.
You, my friend, have an awesome channel as well!! Thank you! Jeff in Michigan Cheers
One belated alternative: while not perfect, a fast-and-dirty alternative to silicone rubber is foam mounting tape, sometimes sold as "camper mounting tape" or "foam rubber tape". It provides a surprisingly good vacuum seal for a low cost -- the biggest downside is that it only does so under compression. Not generally a problem for vacuum chambers, but can be tedious in other applications.
Absolutely brilliant! Inexpensive and easy to build. Loved the lesson soldering copper and brass fittings.
Thanks Chuck : )
Thanks! This was well worth my time as I learned how to "tin" and a bunch of other things. Well done.
Exactly what I need for an idea to make something really neat, more of an experiment.
Go for it!
That got to a full vacuum surprisingly fast, great job!
Thanks Koos. It's the size. Being small there's less air to evacuate.
I looked at the containers I generally mix things in and they're usually quite small, so I thought - why built a big chamber? Small makes more sense. There's roughly 8 square inches of space inside and when you compare that to most things, they fit.
If I ever need a bigger one, the same principles apply. I might need thicker sides to resist the pressure, but as long as it's air tight, it will work : )
I was nervous about the corners holding up but I’m glad it worked.
You're a card indeed... I could not stop laughing at your comments on the side..... Thank you and all of the best from down under...
Awesome video with excellent explanation. Can we use this to dry our clothes?
That’s a wireless pump, nice!
You can also repurpose a compressor pump from an old refrigerator. Use the return side to turn it into a vacuum pump instead of a compressor.
Thanks for the input Mark : )
really awesome video, how long does the chamber hold the vacuum? how did you get the wood airthight enough
dude thank you for that tip with the plumbing
Glad you like it Chris : )
Sweet! Should also work quite nicely in model building setups to remove air from resin before it's poured into latex molds.
You video was so descriptive that I literally had my phone in my pocket at work and was able to visualize everything!! Great content.
Glad you enjoyed it : )
I’ve just started watching trough your vids and don’t know if it’s been mentioned yet but if you don’t want to risk heat damage to electric vac pump find a refrigerant pump from a used window AC unit or refrigerator. (Window unit is normally better style). With a little searching its not hard to find one someone is throwing out. I use one to degas silicone and resin before casting, these pumps will draw close to -30 in Hg (normally -25 to -27)
Thanks for sharing James : )
Great work!!!!
Many thanks : )
I've just built one of my own and hopefully in a few days time I can start using it..........I just have to finish painting, install the silicone seal and plumbing, and I'll be good to go.
Update.......it's finished and it works, but on mine I had to add a 1/4" rubber seal on top of the silicone due to my acrylic top piece not being able to sit right on just silicone alone.
Fantastic video! It's so hard finding tutorials as good as this!
Glad it was helpful!
You, Sir, are an excellent teacher!!! Thank you for this video as for me............ now I can build one for wood stabilization! Regards, Jeff in Michigan
Glad it was helpful!
Amazing tinning tip! I may actually try it now.
It's slow, but you'll never have a leak again : )
Great stuff, my son and I were looking for just such a thing for a project we are working on.
Glad I could help : )
Headed ti the shop to make mine, thanks you make it simple.
Glad to help : )
Thank you!
As someone who's struggled with home plumbing fixes for years this video was worth it just for the tinning lesson!
I taught a friend of mine to tin pipes, just as I do here. He went home, ripped out his bathroom, and renovated the whole thing. It's brilliantly simple, though obviously not the way the professionals do it. But for an amateur, it works!
: )
Brilliant!
Many thanks 😁
Very nice
Fast, cheap, good. Pick 2. Great Vid! SHARPEN YOUR TOOLS ;)
Great videos really helpful 👍
Many thanks : )
those r the yummiest looking marshmallows
That was a side-benefit of making the video ; )
I made my own using a lunch box. It's made out of glass, has a strong plastic lid and a rubber gasket around to seal it. I simply drilled a hole in the lid, inserted a pipe fitting that was screwed on from both sides with thin hex nuts and 2 o-rings in the middle. It's then connected to a vacuum pump and works great. It only cost me 5usd if excluding the vacuum pump.
Thanks for the video.
Very nice great job!
Thanks John : )
Hey VOG, great video. Thanks for sharing. I'm going to have a go!
Have fun!
Can i put epoxy in a silicone mould and than in a pressurepot?
That is awesome! I try to build my own, but bit bigger.
Nice one :-)
great project , plumbing was spot on I think we might have shared the same dad i often wish mine was still with us to see this sort of thing , mine was a plumber too . thanks a lot for every thing and keep involving your son , he will thank you . tony t .
Thanks Tony, that's very kind : )
Sweating solder is called brazing. Nice video.
Many thanks : )
Thank you! I ever wondered if I needed a professional (expensive) chamber for those works...
Many thanks : )
Very nice video.
Thanks Wayne : )
Amazing
Thanks 😁
what paint did you use ? being made of wood it would have to be sealed properly so as not to draw air and moisture out of the wood
I want to make a very large chamber for freeze drying foods stainless is very expensive wood is cheap and easy to work with I was thinking of sealing with resin but not sure what that would be like under full vacuum
Very nice build, welcome to the world of vacuum pressure. I hope in 2 years or so I'll be able to pick up and get stuff like this going again. until then I'm glad to have stuff like this to watch.
I'll have to get a rebuild kit for my Welch Vacuum Pumps, I've got a DuoSeal pump to rebuild for a project that should be able to get below 0.001 Torr (that thing was quite the pocketbook breaker when I got it and it was discounted and in unknown shape... I don't have 220v in my garage so I don't know if it even works... maybe that was a bad buy, time will tell)
Thanks Walt. I doubt my home made chamber could achieve such impressive stats but it certainly is a bonus. I'm enjoying learning the benefits of owning such a tool : )
Could you let me know where you got the hose adapters, I’m having a bit of trouble finding them.
Verry good thanks
No problem, thanks Ben.
Can a pressure pot for cooking replace the wooden chamber
Subscribing now :) can I ask how this set up compares to the Kaya cast machine from Arbe? Obviously different but if I want to cast jewellery, will it do as good a job?
My durabull one is broke. Didn’t change the oil enthusiastically I think. Wish I knew what to do with it
Interesting. How do you calculate how thick plywood you need for each suare inch? I want to build a bigger chamber and need to know how to avoid an implosion.
That's a bit mathematical and scientific for me. I'm more of a try-it-and-see guy, but it depends how much bigger you want to go I guess. My honest advice would be don't go too big unless you really beef things up.
I like the video, however, I think with a little extra plumbing, maybe a cross instead of a tee, (or another tee) the vacuum gauge could be attached between the valve to the pump and the vent valve so the acrylic top needn't be compromised.
Damn patience, gets me too ! Nice job!
Thanks Tom. I'm just too eager to keep going, that's the thing : )
I could smell the sawdust, gas and silicone. I wasn't even there. Aaaahhh. Anyway you sound local and me and my mate are quite crafty and are trying to make a plastic dome. This might be useful
"What the flux?" HAHAHA!!! That made me spit my coffee. Cheers!
Looks great! While back i did something like that with a Solid heavy Shoe box. That work boots came out of it. I thought. I wonder if this work to make a vacuum chamber. Took duck tape! Shoeboxs. Cut out the hole for my nozzle vacuum cleaner. Glue and tape it. It worked i mean if you doing resin . Work for that and it did. But for the real McCoy. Yeah you go the extra mile to build something like that or any other vacuum chamber pot! I have and old air compressor small one. In future attempts to make one. From old small Compressor.
The fun is in trying : )
Your right
what would be the best electric vacuum pump your recommend for casting Guru VOG?
Great video. I have a vacuum pump but was wondering what else I could use for my dome cause my dome is too small. Was concerned that the pressure would break glass, but apparently that is not a problem Thank you.
Hi Laura. Flat glass might be a little brittle. Traditional vacuum chambers used rounded glass which has more strength.
Here I've used thick clear plastic. It's holding up great : )
Like this one! Made by wood. I just made my own creation, but used a glass jar. We will see if it work later :D haha
As long as the glass isn't too thin, you'll be fine. I've seen a few folks use jars 😁
What brass fittings did you use?
I always wondered how to shrink heads.
Try - vacuum distillation.
Boiling points of water and ethanol drop as pressure drops. Ethanol will always boil lower than water. If the pressure drops enough, you can distill ethanol at close to room temperature.
Explain again
When you mention petroleum jelly and the next sentence is "back of the rim" creased me up. lol
; )
Ayup chap. Nice demo fella, very impressive. Keep it simple aye? Got a feeling I might be making one of these, albeit maybe slightly larger. Thanks mate.
Size doesn't matter really mate, just remember to scale up the strength as well. I got away with 18mm plywood as my box was quite small. Vacuum chambers are surprisingly powerful, so thicken and strengthen as you enlarge. As long as things are air tight, you'll be fine : )
What degree vacuum can be achieved? How many millibars / torrs?
Nice build
many thanks : )
How do i know if a pump will be strong enought to de-air resin/silicone for mold casting?
You'll notice I had a small gauge on mine. You'd need to get specific data from the company whose product you're using about how much vacuum is required.
Does clear PETG turn white when over heated?
I'm not sure.
Can you make vacuum insulated panels with this? How would you seal the vacuum?
You need to (1) create the vacuum, (2) seal the envelope/bag, (3) open the lid. How do you do step 2 before step 3?
Do you have a brand name for the "expanding" glue you used?Nice job!!
I have been doing some wet leather molding , I wonder if it work for that
That's not something I've come across Tommy, but I can tell you it's a good vacuum chamber : )
@@vogman ok thanks I was just wondering
I've been looking into vacuum chambers (and pressure chambers as well) for casting silicon. Do you think a similar build with a different lid and lid fastening method might be able to hold pressure as well? It'd be awesome to be able to have a single device to fill both needs.
I think there's countless ways of doing this. My demo here was to show what could be done with spare, cheap parts. As long as it's a strong, non-porous construction, it should work : )
I really wish there was a comprehensive materials list. The parts for the plumbing, pipe ID and OD, what kind of flux, etc. I'm out of my element but I'm willing to givei t a go.
Do you need the fancy vacuum pump? Is there no way around it, then?
(Also, the tinning demo was super useful, thanks!)
nice video thanks
Thanks : )
If you put frozen food in there, could you freeze dry it?
Question: Is a plaster mold & a box frame strong enugh to make a blow mold?
Sorry, I've no idea : )
Nice job showing how simple it can be. Making a VC has been on my to-do list for too long and this gives me inspiration.
Just a ? or 2
* why did you use a plank lined with foil to form the silicon seal instead of simply using the plexiglass top?
* why did you put the vacuum gauge in the plexiglass lid rather than on a "T" just upstream of the close off valve?
These ?? are not criticisms, just curious.
And then a tip (which you probably know about but someone else might not.
* Silicone tubes are notorious for hardening up once they have been used once. To stop it happening, take a small piece of aluminium foil and smooth it over the end of the opening before screwing the cap down over it. (You need to screw the foil well into the threads). Since I learned of this I have never had a tube dry up on me and I have some that I've been using in dribs and drabs for more than 5 years
* when finished using it, leave the waste silicone in the screw on nozzle. Leave it to thoroughly set and pull it out with long nosed pliers. Trim off the small end. Makes a beaut ear plug.
* keep the old nozzles and cut them off at different lengths so you have a set with different opening sizes.
Thanks for the questions and the tips : )
Answers...
1) I used wood so I could have a hole in it, encouraging the silicone to go off
2) Just a personal choice : )
All the best.
Nice job, where you have those air inlet holes, I am going to put a fitting so I can fill it with a gas like co2, so I can test some sodium silicate sand mixtures.
Brilliant idea. Clever adaptation. Let me know how it goes : )
Excellent video, really amusing and a cracking product at the end of it
Many thanks : )
Do you think laminated chipboard would handle the pressure?
I suppose it would depend on the thickness of the chipboard. I used 18mm (3/4 inch) plywood and that's plenty strong enough for a small chamber like I built here. But chipboard generally isn't as strong as plywood. Plus is fairly porous in its structure.
Personally, for the small amount involved here, I'd stick with plywood. You can generally buy off-cuts very cheaply and that's enough for a project this size.
How strong of a vacuum pump do you need for good results?
Do you think a portable 18v one would do the trick?
It depends what you're using the vacuum pump / chamber for. With metal cast, for example, I was surprised just how little vacuum was needed to make a significant difference - I mean, a plastic, homemade hand pump! And yet it worked. But I've no doubt other materials would behave differently.
This video actually makes me go out and build one! Question: Does the vacuum gauge reach all the way through the arcylic? I'm assuming you also used a bunch of expanding glue.
The hole for the gauge goes all the way through, yes. As for expanding glue, not much really. It's best to have good tight joints and any good wood glue would help with that : )
@@vogman that was quick! Tnx! To clarify my question: my gauge is too short to go all the way through the hole, but that doesn't matter right?
Mine doesn't either : )
Just use PTFE tape or similar to make sure the thread is airtight. That's all that matters.
Thank you for your epic videos. I was wondering what other ways there are to slowly melt the wax out of the investment without using a foundry? Thanks legend
Melting the wax out is easy really. An ordinary kitchen oven can do this and typically 80C or so is enough. 100C will certainly do the job. However, we can't be certain ALL the wax has gone. Traces can remain. These burn away cleanly at much higher temperatures.
Also the plaster itself needs the heat to properly prepare it for vacuum casting.
I hope this helps 😁
I was thinking: do you reckon it'd be possible to use a normal 12 V compressor to draw a half-decent vacuum by mounting it inside the chamber and having it pump out to the atmosphere? At one point I had a chamber made of a big pot that I had planned to try this with but before I got everything together to try it I ended up moving and it got left behind somewhere.
In honesty I don't know, but if you have one, give it a go. It sounds a fun experiment : )
How can we seal a vapor-impermeable bag/envelope around an object so that we can take the object out of the vacuum chamber and the vacuum seal remains?
Ideally the bag would be transparent but aluminum foil could be okay.
There is also a product known as tinning flux that has a bit of solder mixed in with the flux itself so that you simply have to heat the pipe and apply the flux and it tins the copper
Just as a thought, with the proper silicon seal etc, would there be anything stopping you using a metal top with a hole cut out of it to put a perforated flask into?
Same thing I'm wondering,I'm just gonna order me a Aluminum pot and make my lid out of glass & find or make a fitted gasket to help with suction,I saw that on another video.