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Can this be molded?

  1. Jul 30, 2011 #1

    1) Can this thing be molded using methods and materials that are used to mold conventional plastic
    1.1) bottles?
    1.2) jars?

    2) How much more expensive will it be (percentage and/or absolutely ) compared to 1.1/1.2?

    3) In a case that it is impossible or much more expensive than conventional bottles/jars - do you have ideas for alternative design to achieve the same functionality?


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  2. jcsd
  3. Jul 30, 2011 #2


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    I think this is pretty much mpossible, because of the re-entrant (or internal) screw threads. Once you have filled the mold, the only way to get the bottle out would be to break the mold. That would be OK for casting with a sand mold that is only used once, but you can't "unscrew" a re-useable mold from the bottle.

    Apart from that, I don't understand quite how your "mid height" connectors are meant to work. How can you insert the "bottle top" and then turn it without using tools, since you will finish up with no free space between the bottles except the thickness of the "nut" between the two opposite-direction threads? And if the two threads don't engage at the same time on both bottles, one side is going to be fully screwed in before the other.
  4. Jul 31, 2011 #3
    How about snap fits? might be much easier to make. Or an interferrence fit.
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