Cavity thickness evolution result

The Cavity thickness evolution result shows the change in cavity thickness (the opening between the moving and fixed halves of the mold) versus time for the duration of the injection-compression analysis. It includes the increased cavity thickness that results from the mold halves normally being open at the start of the injection-compression process.

The Cavity thickness evolution result is an intermediate result, which is animated through time by default. The default range for this result is from the maximum cavity thickness when the press is at its initial specified open position to the minimum cavity thickness after the completion of compression. The cavity thickness starts evolving when the compression process starts.

Using this result

The Cavity thickness evolution can be used to visualize the effect of the mold half closing on the change in thickness of the mold cavity.

• Correlate the Cavity thickness evolution result with the compression settings that were set as part of the process settings. The press waiting time, compression speed(s) and press compression times should correspond to the thickness evolution.
• Compare the final cavity thickness as displayed by the Cavity thickness evolution result at the end of the process, to the design thickness of the model mesh. If the cavity thickness in the Cavity thickness evolution plot is larger than the design thickness this may be due to excess polymer being injected into the cavity, or it may be due to premature solidification in some sections of the cavity before the mold had closed to the intended position.
• Look at the factors that impact melt viscosity, such as melt temperature, and look at factors that impact the ability of the press to compress the melt, such as press waiting time and compression force.