Cavity Shrinkage Compensation
Mold cavities are cut larger than the part by the material mold shrinkage so the cooled part reaches nominal size.
Shrinkage is anisotropic in practice (flow vs transverse). Use grade-specific data.
Flow and transverse shrinkages differ by resin and orientation. Diameter uses hoop, length uses axial.
Cooling & warping guidance
Cooling circuit recommendation
Pick the cavity cross-section. Holes follow the real contour (circle / ellipse / rounded rectangle) at the standoff distance, giving true conformal XY for NC or 3D-printed cooling channels.
Values are rule-of-thumb blow-mold cooling layouts. Tighter standoff/spacing and turbulent coolant (Re > 4000) are recommended where warping/ovalization risk is high. Verify with a mold-cooling / CAE analysis.
Cooling layout (mold end section)
Cooling-hole coordinates (conformal)
| # | X (mm) | Y (mm) | Ø (mm) |
|---|
Downloads the hole table as CSV (No, X mm, Y mm, Ø mm) ready for CAM / NC import.
Hole positions in mm, origin at the cavity centre (+x right, +y up). The holes follow the cavity contour at the standoff distance (true conformal layout). Use for NC drilling / conformal (3D-printed) cooling channels; verify with a mold-cooling / CAE study.
Schematic end-section of the mold plate: the part cavity (centre) with cooling holes on a ring at the standoff distance. The emphasised ring means prioritise that direction — hoop (circumference) for diameter/ovalization risk, axial arrows for length/end-bow risk. Representative only; verify with a mold-cooling / CAE study.