Abstract

The outer side adopts a knurled design, while the inner side features a screw-type structure.

The top can be smoothly screwed into place solely by gravity; however, in the final stage of screwing, the threads will gradually tighten and lock, ensuring a secure closure over the last few millimeters.

I think the screw-top containers printed in the "vase mode" are unique. Paired with the knurling process, although they may not be very practical, they look particularly delicate and interesting.

A few friends have reported that the container doesn't slide smoothly enough. So I printed a second one using green material. At first, I couldn't get it to fit properly. I tried twisting it in and out several times, but it still got stuck. It wasn't until the next day that it finally closed smoothly. As for why this happened, I'm not entirely sure, but I suggest you take the time to open and close it several times. This might help the container fit more snugly and slide into place more smoothly.

Print settings

Printing brand:

• Printing brand:

  Prusa

• Printing model:

  i3 MK3

• Base plate support:

  None

• Supporting structure:

  None

• Layer thickness:

  0.15mm

• Fill density:

  20%

• Remark:

  The printing took about 18 hours, and the finished product worked well. At first, I had to screw it in and out several times until the container could rotate smoothly. In the end, it easily screwed in and closed with the help of gravity.

  Since dimensional tolerances are particularly important in such structures, the actual results may vary depending on the printing parameters or the model design.

Design concept

The initial design was not ideal—the container could not always be completely closed. Later, I segmented the solid part of the internal thread and reduced the last segment by a few percentage points. This way, the threads no longer fully engaged with each other, but instead generated enough friction at the moment of almost complete closure, resulting in a tight fit. As a result, my printed parts would no longer come loose unexpectedly.

During most of the twisting process, the container can rotate freely; when it is tightly twisted, the close fit will lock it securely, ensuring that the container is always in a closed state.