Calculators
- Shot rate · flow velocity · runner size
RIM Molding Parameters
Injection time, flow velocity and runner dimensions from the RIM machine size and gate geometry.
Open calculator - Resin shrinkage · thermal expansion
Mold Shrinkage Factor
Scale factors for the cavity and core at their operating temperatures, corrected for mold thermal expansion.
Open calculator - FKM · axial reciprocating seal
O-Ring Groove Size
Groove width and depth for an FKM (Viton) O-ring in an axial reciprocating seal.
Open calculator - Projected area · pressure · quantity
Core-Pull Cylinder Bore
Hydraulic cylinder bore for a core pull, from projected area, number of cylinders and supply pressure.
Open calculator - Projected area · clamp force
Clamping Press Tonnage
Required clamping force of the mold carrier / press from the part projected area.
Open calculator - Per-side gap · thermal expansion
Guide Pin & Interlock Clearance
Per-side clearance for guide pins, guides and interlocks caused by the thermal expansion difference between cavity and core.
Open calculator - Gripped area · sin α
Demolding Force
Demolding (ejection) force from the projected area of the gripped section and the draft sine.
Open calculator - Guide
PDCPD Mold Design Basics
How PDCPD RIM molds differ from injection molds: materials, temperatures, shrinkage, gating and clamp force.
Read the guide
About PDCPDhub
PDCPD (polydicyclopentadiene) parts are made by reaction injection molding: two low-viscosity liquids are mixed and injected at low pressure, so PDCPD molds are lighter, often aluminium, and sized very differently from thermoplastic injection molds.
These calculators collect the empirical formulas used day to day in PDCPD mold development by Inno Future PDCPD Molds, a PDCPD-RIM mold specialist with ten years of tooling experience. New to PDCPD tooling? Start with PDCPD mold design basics.
Use with engineering judgement
Results are estimates from empirical rules, not a substitute for mold-flow analysis or supplier data. Two source units (Q in the molding calculator and the demolding force) are still unconfirmed and are flagged where they appear.