Mostly Injection .Molded CNC

New Home Forum Mostly Printed CNC – MPCNC Hardware Development – MPCNC Mostly Injection .Molded CNC

This topic contains 3 replies, has 4 voices, and was last updated by  Jason 1 month, 1 week ago.

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  • #61981

    RecycledElectrons
    Participant

    The cost of 3D printed parts (for those without a 3D printer) is most of the cost of a MPCNC.

     

    Has anyone looked at injection molding some of the plastic parts?

     

    Also, I am just curious: If a big company you have heard of wanted to produce and sell MPCNCs would you be willing to license the design? I am not with such a company, but this looks like the perfect design to bring CNC routing to a mass audience via hardware stores.

    #62013

    Ryan
    Keymaster

    The cost of 3D printed parts (for those without a 3D printer) is most of the cost of a MPCNC.

    Aww come on..less than half.

     

    Has anyone looked at injection molding some of the plastic parts?

    Yup. I started with this in mind. I had designed it for this reason with as low as possible unique part count, dafts etc. I used to do this in a previous job. Then I quickly realized paying for mould would stifle the evolution and I doubt it would lower the cost much. Print farms now are so cheap and fast and I can start shipping a new part the day I create it…and have. The real kicker comes in when I found out I would need three different sized builds, that just tippled the amount of moulds but does not change anything about the size of the print farm. Heck Prusa and lulzbot print there parts and there daily unit count has just got to be insane. If they aren’t using a mould there is a reason.

    Also, I am just curious: If a big company you have heard of wanted to produce and sell MPCNCs would you be willing to license the design? I am not with such a company, but this looks like the perfect design to bring CNC routing to a mass audience via hardware stores.

    Yes. The last “big” company that talked to me about it didn’t see eye to eye with me. I am first and foremost concerned with support, they said yes we already have a call center that can help out…ummm nope, I had some suggestions they only wanted to sub out a call center. They just wanted to move units and didn’t seem interested in the project at all. They just didn’t feel right, there might be someone out there with a better approach. I would love to be able to step back a little bit and focus on development more…but that is a whole new level of business.

     

    #63855

    Andy
    Participant

    I had this idea that milling hdpe block might be quicker than printing. Plus it would recycle all the milk bottles that my two baby boys are getting through. If I ever get round to this ill let you know.

    #66124

    Jason
    Participant

    This could be accomplished a lot easier using silicone molds and two part polyurethanes. It would take some skill to make the molds, but once there made, you can make a part in a few hours, and you have a variety of properties to choose from. In both the silicones, and polyurethane.

    I have a home made vacuum chamber I use for just this purpose. I haven’t tried molding the mpcnc parts, but I’d assume you would use rods set through your molds for the bolt holes, so uou can pull them from the mold before releasing/removing the part.

    As far as what to begin with, just cast the 3d printed part. Of course, I’d suggest some post processing such as filler painnt and sanding, or casting the initial part with a hi-res sla printer. The better the first part, the better the rest.

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