Methodology & Limitations

Mould block size is derived from your Shot Size (X, Y, Z) plus a side margin. That margin is looked up automatically from Hongyi's own "Mould Quality Standard & DOP Agreement" reference table (matched to the smallest documented row that covers your shot size), and can be manually overridden.

Plate weights are computed from the mould block dimensions and each plate's material density, then priced using the steel rate you enter (or a suggested rate ratio, for grades we have real market-price evidence for). Core/Cavity and Base/Housing are costed separately since they're typically different steel families.

Suggested grades are ranked by a tool-life tier matched to your expected production volume and part requirements (e.g. corrosion resistance, surface finish) — this is engineering guidance, not a rigid rule; your own toolmaker's judgement should override it where they differ.

Calculated as Steel Cost + Slide/Lifter and Guide-Pillar hardware, multiplied by an Industry × Complexity factor. This factor table is a starting engineering-judgement estimate, not yet back-tested against a large set of historical mould costs — you can always override the factor directly once you have your own benchmark data.

Built up as a line-item table (EDM electrodes, trial material, checking fixtures, etc.) that you fill in directly, for cases where you already have itemised cost information.

Estimated from Total Projected Area (from your Mould Size) × Cavity Pressure (by material, refined by an optional Melt Flow Index input) × a 1.15 safety factor, rounded up to the next machine in a standard tonnage list (up to 5000T). This is a costing-level estimate, not a mould-flow simulation, and does not check shot capacity, plasticizing rate, injection pressure or fill time.

Checks mould-base-vs-platen geometry and shot-weight ratio only. It does not validate clamp force, injection pressure, plasticizing capacity, screw size or fill time — confirm full process suitability with your process engineer.

Shot Weight = Part Weight × Cavitation + Runner Weight. RM Cost/Shot = Shot Weight × your RM Rate. Moulding Cost/Shot = Machine Hourly Rate × Cycle Time, divided by Machine Efficiency%. Rejection and Profit+Overhead are then added as a percentage surcharge on (RM Cost + Moulding Cost). Total Cost/Shot ÷ Cavitation gives Cost/Part.

Each part's Cost/Part is multiplied by its QPS (quantity per finished unit) and summed across every part in the assembly to give the total SKU cost — the same method used in real Hongyi commercial cost sheets.

Estimated as 1.5s (fill allowance) + cooling time (K × wall-thickness², where K depends on material class — amorphous vs crystalline) + a non-cooling allowance that scales with machine tonnage. Typical uncertainty is around ±25% — always overridable with your own known cycle time.

Same projected-area × cavity-pressure × safety-factor method as the Mould Cost Calculator, using your part's projected length/width and cavitation.

An optional input that refines the cavity-pressure assumption only (lower MFI/higher viscosity grades need more pressure, higher MFI/easier-flow grades need less) — it does not affect the cycle-time estimate, since cooling is governed by wall thickness and thermal diffusivity, not melt flow.

The reference K (cooling coefficient) and P (cavity pressure) values shown for ~20 common plastics are fixed engineering constants, not prices — raw material rate is deliberately never sourced from this table, since material cost fluctuates by supplier and by day. Always enter your own current RM Rate manually.

Every generated report shows a unique Report ID and, where applicable, the calculation-engine version that produced it. There is no backend database in this Beta — we can only match a Report ID back to your inputs and result if you share the PDF/report itself with us.