Offshore tooling can cut costs by half, or turn into months of delays and rework. Lessons from the factory floor on choosing, briefing and managing toolmakers in China so tools arrive right, on time.
The photos arrived every Friday: a mould base, then a cavity, then a polished core, always with the same message. "On schedule, T1 next week." Next week became three weeks. When the first samples finally arrived, the gate was in the wrong place, two slides had been replaced by hand-loaded inserts nobody had approved and the cavity steel was not the grade on the quote. The tool had cost half the local price. Fixing it cost most of the difference and four months of launch time.
Tooling in China can deliver excellent tools at far lower cost. The difference between that outcome and the one above is rarely luck. It is management.
Choose capability, not just price
The toolmaking market in China ranges from world-class suppliers to small workshops. Before awarding a tool:
- Visit, or have someone you trust visit. Look at the machines, the measuring room, the trial presses and, above all, tools currently being built for other customers.
- Ask for examples of similar parts in similar materials, with similar tolerances and finishes.
- Check the design team: do they run their own mould flow, and will they share the tool design for approval?
- Understand who actually builds the tool. Some suppliers subcontract more than they say.
Brief like you mean it
Most offshore tooling problems start with an incomplete specification. A good tool specification states:
- Cavitation, steel grades and hardness for every insert, and guaranteed tool life in shots.
- Hot runner brand and controller, or cold runner design.
- Ejection method, cooling requirements, standard components and mould base standard.
- Surface finishes and textures, with references.
- Approval stages: DFM, mould flow, tool design, steel order, T1 and approval.
- Sample quantities and measurement reports required at each trial.
- What happens if the specification is not met.
Translate the critical points, and confirm them in writing. Never assume that "standard" means the same thing in both countries.
Approve the design before steel is cut
Insist on a DFM report and a 3D tool design review before any steel is ordered. This is where gate locations, parting lines, slides, ejection, cooling and steel safety are agreed. Changes here cost nothing; changes after machining cost weeks. It is the offshore equivalent of the DFM review you should already be doing on the part.
Track progress with evidence
Weekly reports should include dated photos of specific milestones, such as steel arrival, roughing, heat treatment, EDM, fitting and polishing, against the agreed schedule. Generic photos and "on schedule" messages are not progress reports. A slipping milestone early in the build is the best warning you will get.
Manage trials properly
- Attend T1, in person or through someone on the ground. Watching the trial tells you far more than the report.
- Ask for the process sheet, not just the parts. You need to know what settings produced them.
- Measure parts against the drawing with a full dimensional report, and agree an issue list with owners and dates.
- Separate tool faults from design changes, and agree in advance who pays for each.
Plan the handover
Before the tool ships, confirm final approval samples, spare parts, the tool's process sheet, maintenance instructions, 3D tool design files and ownership documentation. If the tool will run in a different moulder, plan a validation trial at the receiving site too.
The relationship matters
The best results come from long-term relationships with suppliers who understand your standards and see you as a repeat customer. Clear expectations, prompt decisions, fair payment terms and respect for the supplier's expertise make a remarkable difference to the attention your tools receive. Compare quotes the way we described in how to read a moulding quote, and remember that the cheapest tool is rarely the cheapest outcome.
