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#151
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Towards the *fully* 3D-printed electric cars.
In sci.physics "Greg \(Strider\) Moore" wrote:
"David Mitchell" wrote in message o.uk... wrote: In sci.physics David Mitchell wrote: wrote: OK, what "stuff" would people be making at home? Jewellry, utilities, tools, gadgets. Could you be any more vague? Yes. Yes I could. Things. People will make things. All of the things. I suspect 3D printing at home will be as successful as the personal computer. I mean everyone knows they're useless at home and we'll only need a few major mainframes. Personal computer use in the home is dropping with increased use of smart phones for those important tasks such as posting on twitter and facebook. Which reminds me, I need to tell my friends who own 3D printers and printing parts to fix things at homes, tools, and tool holders and all manner of things that I never would have thought of myself that they're wrong and no one will effectively use a 3D printer at home. How many people do you know that own 3D printers? I know about a dozen people that own things like welders, milling machines, drill presses, and lathes but no one that owns a 3D printer. Honestly, it's pretty damn presumptuous to claim that there's no future to 3D printing at home. I suspect 10-20 years from now we'll be laughing at such claims. Like computers, it will continue to improve. It'll get faster, more capable, capable of using more materials, etc. Since no one in this thread has made that claim, your post is nonsense. -- Jim Pennino |
#152
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Towards the *fully* 3D-printed electric cars.
Robert Clark schrieb:
Some types of insulation such as silicone rubber have a melting point of 300 C. Do you know what a rubber is? Apparently not. |
#153
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Towards the *fully* 3D-printed electric cars.
In sci.physics Robert Clark wrote:
snip Could lay down the metal, then help it cool by blowing cold gas over it, then lay down the insulation, etc. Some types of insulation such as silicone rubber have a melting point of 300 C. Nope, silicone rubber once cured has no melting point. 300 C is the maximum temperature it can withstand before permanetly degrading. Silicone rubbers in general have poor resistance to steam, super heated water, oils, fuels and solvents. Silicone rubbers would be impractical to 3D print due the the chemistry. -- Jim Pennino |
#154
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Towards the *fully* 3D-printed electric cars.
On Mon, 03 Jul 2017 20:16:54 -0700, Fred J. McCall wrote:
JF Mezei wrote: On 2017-07-03 16:14, Jeff Findley wrote: Actually if the 3D printed part replaces many other parts (e.g. SuperDraco engines) then it's faster to print than it is to manufacture and assemble all those other parts. Am thinking 3D printing would have uses making moulds/mandrels for complex composite parts (which would then be far stronger than the plastic 3D printed moulds). Uh, 3D printing hasn't been limited to plastics for a very long time. SpaceX is directly printing rocket engine combustion chambers. They're not made of plastic. Once done, you can melt the plastic to get it out of places where it normally couldn't get out. So it seems that Mr. Mezei has reinvented Lost Wax Casting. Welcome to the 5th Centruy BCE. Why even involve 3D printing if you're then going to throw it away by reverting to casting parts? Apropos of this - a couple thing that are Not There for the 3D Printing of high strength materials are eliminating post-printing machining to finish the part, and being able to deal with heat treatment and hardening. At this point, it looks like unless you're dealing with low volumes - prototyping and small custom runs, traditional methods are producing better results. There are possible applications at present - the USN is experimenting with using 3D printing aboard ships to allow spare parts to be fabricated as necessary - albeit with severe limitations on the parts (See again materials and treatment) that can be produced. -- Pete Stickney “A strong conviction that something must be done is the parent of many bad measures.” ― Daniel Webster |
#155
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Towards the *fully* 3D-printed electric cars.
Could lay down the metal, then help it cool by blowing cold gas over it, then lay down the insulation, etc. Some types of insulation such as silicone rubber have a melting point of 300 C. Nope, silicone rubber once cured has no melting point. 300 C is the maximum temperature it can withstand before permanetly degrading. Silicone rubbers in general have poor resistance to steam, super heated water, oils, fuels and solvents. Silicone rubbers would be impractical to 3D print due the the chemistry. In any case there are ceramic-based insulators that can withstand in the range of 500C http://www.ceramawire.com/technical-information.shtml Bob Clark ---------------------------------------------------------------------------------------------------------------------------------- Finally, nanotechnology can now fulfill its potential to revolutionize 21st-century technology, from the space elevator, to private, orbital launchers, to 'flying cars'. This crowdfunding campaign is to prove it: Nanotech: from air to space. https://www.indiegogo.com/projects/n...ce/x/13319568/ ---------------------------------------------------------------------------------------------------------------------------------- -- |
#156
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Towards the *fully* 3D-printed electric cars.
On Wed, 12 Jul 2017 10:24:38 -0400, "Robert Clark"
wrote: "Spehro Pefhany" wrote in message .. . ================================================= =================== ... 3D printing actually is quite useful as part of a bespoke jewellery-making process. You design a 3D model using a CAD program such as Jewelsmith, print a positive, then use investment casting to produce a one-time mold, which is used to mold precious metal. No one said that 3D printers weren't useful. The argument is whether they'll take over traditional manufacturing. That is, everyone makes what they need at home, on their magic printer. I can't see anyone printing an electric, gas, or water company. Tools and gadgets are so vague they are meaningless. Tools? I just 3D-printed a fixture for stencil printing a PCB. It holds a small panel (snaps into the mounting holes) and has cutouts to allow the PCB to sit flat after parts have already been mounted on the other side. Crude but more than good enough. A machinist would have charged me perhaps $500 and taken days. And I would have gotten bogged down in toolpaths and cutter compensation and such like programming it myself in a CAM program. How many people in the US would *ever* have done such? I do this stuff too and would no more dream of printing a stencil than manufacturing my own PCBs. |
#158
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Towards the *fully* 3D-printed electric cars.
On Thu, 13 Jul 2017 06:50:39 +0100, David Mitchell
wrote: wrote: In sci.physics David Mitchell wrote: wrote: In sci.physics David Mitchell wrote: wrote: OK, what "stuff" would people be making at home? Jewellry, utilities, tools, gadgets. Could you be any more vague? Yes. Yes I could. Things. People will make things. All of the things. Great, yet another techno nerd weenie who spends way too much time watching Star Trek reruns. Bless. It's almost as though you imagine anyone give even the tinest of ****s what you think. You're reading his posts and answering. Apparently _you_ give at least the tiniest **** what he thinks. |
#159
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Towards the *fully* 3D-printed electric cars.
On Thu, 13 Jul 2017 17:37:59 -0000, wrote:
In sci.physics "Greg \(Strider\) Moore" wrote: "David Mitchell" wrote in message o.uk... wrote: In sci.physics David Mitchell wrote: wrote: OK, what "stuff" would people be making at home? Jewellry, utilities, tools, gadgets. Could you be any more vague? Yes. Yes I could. Things. People will make things. All of the things. I suspect 3D printing at home will be as successful as the personal computer. I mean everyone knows they're useless at home and we'll only need a few major mainframes. Personal computer use in the home is dropping with increased use of smart phones for those important tasks such as posting on twitter and facebook. Banking and Amazon, too. Though that isn't to say that there isn't anything beyond the 3D printer. Which reminds me, I need to tell my friends who own 3D printers and printing parts to fix things at homes, tools, and tool holders and all manner of things that I never would have thought of myself that they're wrong and no one will effectively use a 3D printer at home. How many people do you know that own 3D printers? I know of none but we have several at work. One of my cow-orkers was going to buy one and use it as a side business but he figured out that it made no business sense. I know about a dozen people that own things like welders, milling machines, drill presses, and lathes but no one that owns a 3D printer. Honestly, it's pretty damn presumptuous to claim that there's no future to 3D printing at home. I suspect 10-20 years from now we'll be laughing at such claims. Like computers, it will continue to improve. It'll get faster, more capable, capable of using more materials, etc. Since no one in this thread has made that claim, your post is nonsense. +1 |
#160
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Towards the *fully* 3D-printed electric cars.
On 7/12/2017 11:29 PM, Fred J. McCall wrote:
Serg io wrote: major limitation is, one cannot "print" higher melting temp material on lower melting point material. And just what does that really limit? obviously, printing objects composed of mixed materials. |
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