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Thread: US Government shuts down 3D gun manufacturer

  1. #121
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    Re: US Government shuts down 3D gun manufacturer

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    Re: US Government shuts down 3D gun manufacturer

    Quote Originally Posted by Jerry View Post
    I'm not against 3D printing at all.

    I just don't see how it's going to be in every home anytime soon, and, the 3D printed gun is an absolute failure, unlike the 3D printed house, organs, and the above cited 'magic arms'.

    I see no company trying to market the 3D printer to the average person.
    No kidding.

    It's brand new technology that is still being developed.

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    Re: US Government shuts down 3D gun manufacturer

    Quote Originally Posted by Dapper Andy View Post
    It's brand new technology that is still being developed.
    My point exactly.

  4. #124
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    Re: US Government shuts down 3D gun manufacturer

    Quote Originally Posted by DVSentinel View Post
    Maybe I should look up the cost of the printers and materials. While probably more expensive than high-density foam and fiberglass, the end product would be more consistent and probably much better.
    Doesn't look like anyone noticed, but a few pages back I did actually link to an open source DIY 3D printer. As I previously noted, it can't currently print at high enough density for gun (though it is coming), but it can certainly perform the functions you described needing. You will need to print in small parts and put them together like a jigsaw, or create a giant RepRap by modifying the design and construction of the printer.

    I built a v1 RepRap about a year and a half ago, and the total cost came in at about $400. The v2 is hopefully going to be released within the next year or two, and it's already been announced that it will be able to print other materials, not just hard plastic.

  5. #125
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    Re: US Government shuts down 3D gun manufacturer

    Quote Originally Posted by HumanBeing View Post
    Doesn't look like anyone noticed, but a few pages back I did actually link to an open source DIY 3D printer. As I previously noted, it can't currently print at high enough density for gun (though it is coming), but it can certainly perform the functions you described needing. You will need to print in small parts and put them together like a jigsaw, or create a giant RepRap by modifying the design and construction of the printer.

    I built a v1 RepRap about a year and a half ago, and the total cost came in at about $400. The v2 is hopefully going to be released within the next year or two, and it's already been announced that it will be able to print other materials, not just hard plastic.
    Don't need hard plastics. For some parts, what you describe will do. For the molds needed for ceramics, need density more than hardness to reduce porosity and the need for machining/polishing. Just need to have enough strength to hold together under light to moderate pressures when filling the molds. Silicon Nitride, Silicon carbide, Titanium Carbide, etc, can only be machined with diamond, and even then it eats the hell out of diamond tools. Unfortunately, you cannot order some of the powders without a hazmat license, or at least most of the sites have a license level listed in subnotes. However, without a sintering furnace, pretty much left with mixing the powders with an heat cured epoxy is the closest available structure. Due to the bonding nature of expoxies, would have to create destructable molds and build new ones each time. Being able to "print" a mold from a soluble material would be real nice. Most available pre-mixes are around 25-30% ceramic with rest epoxy. None with Silicon Nitride or 28% Graphite mixed with Silicon Nitride are current available that I have found. I want to try a 60/40 mix or even less epoxy, just enough to bind it together. Wonder if the newer models can handle teflon?
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  6. #126
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    Re: US Government shuts down 3D gun manufacturer

    Quote Originally Posted by DVSentinel View Post
    Wonder if the newer models can handle teflon?
    From what I've read, the plan is that v2 will be able to print hard plastics (as with v1) and various forms of polyurethane. It will also be able to print individual objects with more than one material (for example a hard plastic core with a soft rubbery outer shell).

    Sadly I don't have enough experience of working with the materials that you're using, but I have successfully used RepRap to create molds (in pieces that have to be put together, then sanded) that I used for making carbon fiber items and fiber glass molds. I also made a chess set

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    Re: US Government shuts down 3D gun manufacturer

    Sorry for double post, seems like it won't let me edit the last post to add this but....

    I just read that the next major set of plans to be made available for 3D printers is for an invisibility cloak. From what I read of how it works, it would only make something "invisible" from certain angles, and right now that "something" is only microwaves, but still, the next step is hilariously obvious; is someone going to manage to combine the two plans to create printable, invisible/semi visible guns?

    "The future ain't what it used to be"

    Make your own invisibility cloak with a 3D printer
    Last edited by HumanBeing; 05-17-13 at 04:15 AM.

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