Container Forming

Parent Category: Industries

The production of container glass often requires many cost-intensive trials on the production line until the container has the requested quality. By simulation of the container forming process, you can compare different variants of your container and you receive the basis for every optimization, which leads to cost reductions and time savings.  Our CFD simulation software NOGRID pointsBlow was developed especially for the container glass industry. With this software the container forming process can be computed in full 3D in a practicable time.

The following kinds of container glass forming processes can be simulated:

  • BB (Blow and Blow)
  • PB (Press and Blow or Wide Mouth PB)
  • NNPB (Narrow Neck Press and Blow)
  • PB (Press and Blow for the tableware industry)

 


Simulation blow and blow (BB) container glass
Figure 1: Result view of some selected time steps


As in reality, the simulation starts with gob loading and ends at take out. All process steps are integrated in one simulation model and all walls are switched on and off at the corresponding time step given by the IS machine time data. As shown in figure 2, the shape of the bottle can be each possible 3D shape. Also bottles with a handle or perfume bottles can be computed. Thus, there are no limits regarding bottle design and the user can test and evaluate a container design without restrictions.


Steps during BB process Experimental verified bottles
Figure 2: Steps during BB process and different bottle designs

In the past many many container designs were computed and compared to real bottles - with perfect results. The weights of bottles to be computed can be between 20 g (for example small perfume bottles) and 2000 g. The computation time depends on gob weight and is in the range of minutes for 2D computations and in the range of hours for 3D computations.

 

NOGRID pointsBlow helps to understand the origins of glass defects in the container. Therefore, simulation helps to understand how the forming process is working in detail, which is the basis for all improvements.


More information you will find here.