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Thread: Impossible piece from the 70s?

  1. 23rd May 2021, 03:33 PM #1
    lostelectron
    lostelectron is offline Junior Member
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    May 2021
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    Impossible piece from the 70s?

    I have recently started studying injection molding.

    The other day I came across a keyboard switch by IBM manufactured in the 70s early 80s.

    How is it possible to make such a complicated housing?! 90 degree shaft, with also 90 degree cylinders. and no visible marks that I can see.

    Maybe injection molding finished with some CNC? a la car engines?
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  2. 24th May 2021, 02:49 PM #2
    Pilot
    Pilot is offline Senior Member
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    Nov 2012
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    Re: Impossible piece from the 70s?

    Hi, I see simple product from very simple injection molding tool (open-close, no cores etc) . Tool is probably multicavity with cold runner (banana)
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