SIPA has been working on various projects for clients in determining a collapsible structure for a large volume dispenser bottle.
- The main problems with these large collapsible containers are the irregularity of the collapsing mechanism and the volume that remains in the container
- Supported by particle experimental results, simulations were done with FEM analysis
- The purpose of this was to find the buckling mechanism that would best suit a client’s request, that allows the bottle to collapse with a hold-up of water the least possible
Results & packaging features
Different bottle shapes from square to round of these large containers were analyzed along with the shape of the ribs and base.
The curves of the volume vs. pressure and the base center displacement vs. pressure, reported in Fig. 1 and the photograms (Fig 2) of the simulation helped in understanding the collapsing phenomena and how to modify the structure in order to have a good performance. Comparison was done with prototyping results.
Fig. 1 Curves obtained from FEM analysis with various shape dispenser bottles
Fig 2 Photograms of collapsing simulation (absolute deformation-mm-in failure sequence)