The Cavity Volume:XY plot shows the change in volume between the moving and fixed halves of the mold.
It includes the increased volume that results from the mold halves being slightly open at the start of the Injection-compression process.
The Cavity volume result does not include the volume of material injected into the mold.
The Cavity volume result is generated by an Injection-compression analysis, and shows the change in volume (in cm3) of the mold cavity versus time for the duration of the compression analysis.
Using this result
The
Cavity Volume:XY plot can be used to visualise the effect of the moving half of the mold on the overall volume of the mold cavity.
- Compare the Cavity Volume:XY plot result against 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 graphical result.
- Compare the final cavity volume as reported by the Cavity Volume:XY plot, to the volume of the model mesh, as reported in the analysis log. The volumes should correspond. If the volume reported in the Cavity Volume:XY plot is larger than the model volume this may be an indication that the melt has cooled below its transition temperature before the mold had closed to the intended cavity volume.
- 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.