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  • Suggestions on the ways to machine/make a microneedle patch this small.

    Discussion in 'The main mechanical design forum' started by jjoll, Sep 15, 2016.

    1. jjoll

      jjoll New Member

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      Hi,
      I am a research student and for my prototype project I need a microneedle patch with the following dimensions:
      http://imgur.com/a/5H07S
      I have a Electrical Eng background and I dont know how and through which methods it is possible to get such a micro-needle with such a miniature dimensions. Any ideas on how can I have something like this, custom made cheaply? I was thinking of micro-machining but it seems that no micro-machining facilities respond to my emails (probably due to the fact that I need only 1 or 2 samples and it wont make it cost effective to micro-machine it) and I also thought of 3d printing it but I couldn't find any vendor who can print in such a small dimensions.
      thanks in advance
       

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    3. Erich

      Erich Well-Known Member

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      First problem. Your pointy thing is 1.5 mm high. The hole where the material for the pointy thing comes from is only 0.8mm long. You get no responses because you are asking for the impossible.
      This part could be made by laser cutting, or chemical etching.
      Bending the tabs is going to be tedious and time consuming. Read expensive.
      First thing to learn is that making things in onesy twosey is NEVER cost effective. It is expensive. You pay money now for a part in a couple weeks, or you dedicate a lot of your time figuring out how to do it yourself.
       
    4. K.I.S.S.

      K.I.S.S. Well-Known Member

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      I can't download your link, but that's my problem.
      Have you considered EDM? This method is good for extremely fine holes and tolerances and means that the electrically charged wire is spun at a very high rpm, resulting in a round hole. That's the way Diesel injection people do it.
       
    5. K.I.S.S.

      K.I.S.S. Well-Known Member

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      I've now been able to download your link. As such, please disregard my off the mark previous comment. Stick with what Erich said.
       

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