how to draw thread on a plastic bottle cap?

rajesh_nair102

I need help in designing a cap for the plastic bottle neck shown in the image. What could be the best possible method to design a cap with threads matching with the profile of the threads on bottle neck? 

owen_sparks

Depends on what your design intent is... 

Product to injection mold?
To 3D print?
To render and just look bottle-like?

A couple of ways.
(1) Extrude a circle and boolean subtract the bootle
(2) Extrude a circle and sweep-remove a thread profile around a helix
(3) Revolve a cross section of the cap through 360 deg.

Owen S.

romeo_graham

If you're making a cap that needs to perform correctly on that bottle finish, you should check the internet for SPI bottle finish (and closure) specs. There are several tables available that will help you design a closure that will work.

Use the helix feature to sweep a thread profile at the correct pitch etc.

Good luck!

owen_sparks

Depends on what your design intent is... 

Product to injection mold?
To 3D print?
To render and just look bottle-like?

A couple of ways.
(1) Extrude a circle and boolean subtract the bootle
(2) Extrude a circle and sweep-remove a thread profile around a helix
(3) Revolve a cross section of the cap through 360 deg.

Owen S.

romeo_graham

If you're making a cap that needs to perform correctly on that bottle finish, you should check the internet for SPI bottle finish (and closure) specs. There are several tables available that will help you design a closure that will work.

Use the helix feature to sweep a thread profile at the correct pitch etc.

Good luck!