Buyers new to overseas molding usually plan around the production run. In practice, production is one of the shorter phases. The schedule from purchase order to first shipment is dominated by building the tool and by the approval loops around it — and the approval loops are the part the buyer controls.
The phases
- DFM review and quotation. Days, once a complete model, drawing, resin, and volume are in hand. Incomplete information is the most common reason this stretches to weeks.
- Tool design approval. The mold layout, parting line, gate position, and ejection scheme are proposed and signed off. Cheap to change here, expensive later.
- Tool build. Steel procurement, machining, EDM, fitting, and polish. This is the longest single block, and it scales with cavitation, complexity, side actions, and surface finish.
- T1 samples and review. First shots, dimensional report, and the customer decision. A tool almost never ships on T1; expect at least one modification round.
- Trial production. A short run under production conditions with dimensional inspection, to prove the process rather than the tool.
- Mass production. Driven by cycle time, cavitation, and press scheduling.
- Inspection, packing, and freight. Final QC against the agreed AQL, export packing and documentation, then ocean, air, or express transit.
Which phases are elastic
Tool build time is mostly fixed by physics and machine hours. What genuinely moves the date is elsewhere:
- Approval turnaround. A tool design sitting in an inbox for two weeks adds two weeks to the schedule and nothing else. This is the single largest recoverable delay in most programs.
- Design changes after the tool is cut. Adding material to a cavity is a weld-and-remachine operation; removing material is comparatively simple. A change that requires adding steel can restart a significant portion of the build.
- Late specification. Texture, colour target, and printing requirements introduced after tool design can force rework of surfaces already finished.
- Ocean freight. Transit is weeks, not days, and it is normally the second-largest block in the calendar. Air freight compresses it at a cost that only makes sense for launch quantities.
How to protect the date
Freeze the design before tooling starts, and treat that freeze as real. Name one person on your side with authority to approve tool design and T1 samples, and agree a turnaround commitment for each. Specify texture, colour, and decoration in the original RFQ rather than after sampling. Build one modification round into the plan rather than hoping for none, because planning for zero is what turns a normal iteration into a missed launch.
Finally, ask for the schedule as phases with dates rather than a single total. A supplier quoting one number is hiding where the risk sits; a phased schedule tells you which weeks are yours to lose.
Send a drawing and a target date and we will come back with a phased schedule.