Die Casting Tooling Design and Mold-Flow Simulation
The die is decided before the die is drawn
Most of the cost and most of the quality of a die cast part is settled while the tool is still a model. Gate position decides how the cavity fills and where the last air goes; the runner and overflow layout decides where oxide and cold metal end up; venting decides whether gas escapes or stays trapped in the section. Our in-house R&D team covers tooling design, mold-flow simulation and material testing, and DFM analysis is carried out before any tooling commitment is made.
Simulation earns its place when it changes a decision rather than confirming one. A fill pattern showing the metal front meeting ahead of a vent, or a last-to-fill region sitting inside a thick boss, is cheap to correct in the model and expensive to correct once the tool steel is hardened. That is the whole argument for doing the work early instead of after the first trial shot.
What the model needs in order to be useful
A simulation is only as good as its inputs. We work from STEP, IGES or DXF files, and the useful additions are the alloy preference or a note that it is open, the annual volume, the critical tolerances with their locations, the finishing requirement and any standard the part must meet. Volume in particular shapes the tool: steel grade, cavity count and cooling provision are all sized against it.
Wall thickness transitions, draft and radii are checked at the same stage. Sharp internal radii concentrate stress and impede flow; abrupt thickness changes leave a heavy region that freezes last and shrinks. Each of these is a one-line change on a drawing and a rework on a hardened tool, which is why the DFM findings are worth reading before the programme is frozen.
From tool design to first shots
Once tooling is cut, the first trial establishes the process window rather than finished quality. Initial shots are used for flow verification, porosity checks and fit-up against the mating parts, with dimensional and cosmetic refinement following once the window is stable. Where the geometry is gas-sensitive the tool is built for vacuum die casting, and features needing five-axis CNC finishing are identified before the first shot rather than after it.
Prototype samples ship in about 7 days and volume production runs 30 to 45 days after sample approval, with a minimum order quantity starting from 100 pieces. Send the drawing together with the volume estimate, and mark any feature already fixed by the rest of your assembly, because those are the ones the tool design has to protect. DFM review is free and we reply with costing within 24 hours, supported by ISO 9001 and IATF 16949 documentation with RoHS and REACH compliance.
FAQ
Do you run mold-flow simulation?
Yes. Tooling design, mold-flow simulation and material testing are handled in-house by our R&D team. Simulation is used to change decisions - gate position, venting, fill pattern - while the tool is still a model rather than a finished die.
What should I send for tooling design?
A 3D model in STEP, IGES or DXF, plus the annual volume, alloy preference, critical tolerances with their locations, the finishing requirement and any standard that must be met. Volume drives steel grade, cavity count and cooling provision.
How long does tooling take?
Prototype samples are delivered in about 7 days and volume production runs 30 to 45 days after sample approval. Complete drawings and an accurate volume estimate at enquiry stage are the largest single factor in holding that schedule.
Can the tool be changed later?
Some adjustments are straightforward, but gate position, runner layout and cooling provision are largely fixed once steel is cut. This is why DFM and simulation findings should be reviewed before tooling is committed.
All figures above refer to standard product data sheets; final confirmation is subject to written quotation.