studiot Posted March 25, 2023 Posted March 25, 2023 @Sensei get your 3D printer out and see what you can do. This rocket nearly made it. https://www.bbc.co.uk/news/science-environment-64893578 Quote 3D printed rocket takes to the sky over Florida
Sensei Posted March 26, 2023 Posted March 26, 2023 (edited) @studiotThere are different 3D printing technologies. Fused deposition modeling (FDM) is the most common and is what I use. I don't see mention of technology they used. Clickbait for newbies. "Everything" around you, that is less than 5 years old, was 3D printed at some point by engineers creating a prototype of the thing in question. I have 3D printed vodka glasses.. FDM is good for the environment. You can take the plastic PET bottle and convert to filament that will be used for 3D printing. This means you use up the plastic you buy everyday and have free filament for 3D printing. Add in solar panels and you have a machine that runs completely for free.. There are two main techniques: 1) using a hotend from a 3D printer to heat a PET bottle to make the filament, 2) use gluegun for the same effect.. So you could go to a landfill and find enough PET bottles to make whole rocket body for free.. Edited March 26, 2023 by Sensei 1
Sensei Posted March 26, 2023 Posted March 26, 2023 (edited) 3D resin printing (UV light) Edited March 26, 2023 by Sensei
studiot Posted March 26, 2023 Author Posted March 26, 2023 (edited) Thanks for the reply and links. I thought you might be interested. I was wondering what sort of printable material would withstand rocket launch and propulsion techniques. PS I did my first bit of plastic welding repair recently, to a broken laundry stand boss. Was not so successful with my second repair attempt to a broken freezer handle. Edited March 26, 2023 by studiot
Sensei Posted March 27, 2023 Posted March 27, 2023 23 hours ago, studiot said: I was wondering what sort of printable material would withstand rocket launch and propulsion techniques. Buy a ~ $400 electric vacuum pump from any chemistry lab equipment store and tell me which PLA, PET, ABS, etc., will survive a few minutes in an environment with a pressure close to 0 Pa, once the device is activated.. Make a chart in Excel/Spreadsheet.. I tried to find the nearest chemistry lab store in your area selling a vacuum pump in Gloucestershire, but I was inundated with some far too expensive commercial used vacuum pumps.. 3D printing uses: PLA, PET, ABS, ASA, resin.. If you want to know their properties, look online. Temperature - not very resistant.. 200 C is used for melting PLA, 240-260 C for almost all of them used in FDM.. But temperature alone is not the only parameter, there is also pressure. Which is not given by producers. Smart guy, like you, with <$1k would put 3D printer inside of box 1x1x1m and use vacuum pump to get out of the air from it while printing to see what happens.. and make a video from it.. i.e. can you 3D print in ~ 0 Pa environment.. can you 3D print in < 100 Pa environment.. can you 3D print in <1000 Pa environment.. etc. etc. a series of useful experiments..
Sensei Posted March 27, 2023 Posted March 27, 2023 On 3/26/2023 at 12:29 PM, studiot said: PS I did my first bit of plastic welding repair recently, to a broken laundry stand boss. Was not so successful with my second repair attempt to a broken freezer handle. There is the easy way and the right way. An easy way is to use a 3D pen. https://www.google.com/search?q=3D+pen+device Very cheap, uses the same stuff as a 3D printer, so it's readily available. It's such a 3D printer at hand (gluegun can be used too!). (an electronics engineer uses gluegun for everything) The right way, withstanding much more: 3D scanning/reproducing the original object in a 3D application, and then printing it. 3D printed laundry rack connectors + some metal tubes.. can be made for a fraction of the price of the original thing in the store.. Then sell 3D project, and you can earn more than ever in your life.. 1
exchemist Posted March 27, 2023 Posted March 27, 2023 3 hours ago, Sensei said: Buy a ~ $400 electric vacuum pump from any chemistry lab equipment store and tell me which PLA, PET, ABS, etc., will survive a few minutes in an environment with a pressure close to 0 Pa, once the device is activated.. Make a chart in Excel/Spreadsheet.. I tried to find the nearest chemistry lab store in your area selling a vacuum pump in Gloucestershire, but I was inundated with some far too expensive commercial used vacuum pumps.. 3D printing uses: PLA, PET, ABS, ASA, resin.. If you want to know their properties, look online. Temperature - not very resistant.. 200 C is used for melting PLA, 240-260 C for almost all of them used in FDM.. But temperature alone is not the only parameter, there is also pressure. Which is not given by producers. Smart guy, like you, with <$1k would put 3D printer inside of box 1x1x1m and use vacuum pump to get out of the air from it while printing to see what happens.. and make a video from it.. i.e. can you 3D print in ~ 0 Pa environment.. can you 3D print in < 100 Pa environment.. can you 3D print in <1000 Pa environment.. etc. etc. a series of useful experiments.. Can you explain why you think 3D printing in a vacuum or under higher ambient pressures would present a challenge? I can't see what the problem would be. So long as the material in question would not be a liquid that might boil under vacuum, that is.
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