Determining Cavitation Count and Cycle Time in Multi Cavity Injection Molds
Determining cavitation count and cycle time requires balancing thermal cooling physics against clamping limits, runner shear, and capital amortisation curves.
Dimensional Capability Mapping
Meaning
Statistical analysis tools visualize the distribution of part measurements across a multi-cavity injection mould. Detailed dimensional capability mapping identifies which cavities produce parts closest to the nominal specification. The assessment concludes when the process stability is verified across several production shifts.
Tolerance Analysis
Measurements from every cavity are plotted to show the spread of critical features like hole diameters or wall thicknesses. Systematic dimensional capability mapping reveals if the mould steel requires adjustment or if the cooling layout is uneven. Narrow distributions indicate a robust process that can absorb minor variations in resin viscosity.
Mould Optimization
Engineers use the resulting data to center the process within the allowable tolerance window. If dimensional capability mapping shows that certain cavities are consistently outliers, the gates might need resizing to balance the flow. This step reduces the scrap rate by ensuring that the entire shot stays within the customer’s limits.
Long-term production relies on this data to schedule preventative maintenance before parts drift out of spec. Measuring the same part over time reveals the impact of tool wear on the final dimensions.
Quality Record
Inspection reports provide the evidence needed to sign off on a new tool for mass production. Accurate dimensional capability mapping confirms the manufacturing readiness.