| Material Selection | The mould material affects thermal stability, wear resistance, surface finish, machining accuracy, and service life. | Request the material grade, hardness range, heat-treatment record, and material certificate for each mould component. | Material specifications should be documented and consistent with the intended EVA compression or injection process. | 15% |
| Dimensional Accuracy | Accurate cavity dimensions help control shoe size, fit, density distribution, sole geometry, and repeatability between production batches. | Review 2D drawings, 3D CAD data, coordinate-measuring-machine reports, and first-article inspection results. | Tolerance requirements should be agreed in writing before production and verified against the approved technical drawing. | 15% |
| Ventilation and Air-Release Design | Effective air release reduces voids, incomplete filling, surface defects, and inconsistent expansion during EVA moulding. | Ask for the venting layout, trial-moulding records, defect analysis, and corrective-action documentation. | The design should be validated through production trials using the buyer’s actual EVA compound and process conditions. | 12% |
| Surface Finish and Texture Reproduction | The cavity surface determines the appearance, texture, branding-free visual details, and demoulding performance of the finished sole. | Inspect polished areas, texture samples, surface roughness records where applicable, and approved sample soles. | The final mould should reproduce the approved texture uniformly across all cavities and production lots. | 10% |
| Thermal and Process Compatibility | EVA moulds must withstand the temperature, pressure, cycle time, and release conditions used by the buyer’s equipment. | Compare the mould design with the press or injection-machine specifications and review documented trial parameters. | Compatibility should be confirmed on the buyer’s intended production equipment before mass manufacturing. | 12% |
| Prototype and Sampling Capability | Reliable sampling allows design, fit, texture, shrinkage, and production risks to be identified before tooling approval. | Evaluate prototype lead time, sample approval procedures, revision control, and the number of included correction rounds. | A formal sample approval process should exist before the mould enters regular production. | 10% |
| Quality Management System | Documented quality controls reduce errors in design transfer, machining, assembly, inspection, and delivery. | Request a valid quality-management certificate, inspection plan, calibration records, and nonconformance procedure. | A documented quality system, such as ISO 9001-based controls, is preferable for international sourcing. | 10% |
| Lead-Time Reliability | Late tooling can delay footwear development, seasonal launches, factory trials, and customer deliveries. | Compare quoted lead time with documented delivery performance and request a stage-by-stage production schedule. | The supplier should provide clear milestones for design confirmation, machining, assembly, sampling, correction, and shipment. | 8% |
| After-Sales Tooling Support | Technical support is important for mould cleaning, maintenance, repair, dimensional adjustments, and production troubleshooting. | Review warranty terms, spare-part availability, response times, maintenance instructions, and remote troubleshooting procedures. | Support terms should define response channels, covered defects, repair responsibilities, and the warranty period. | 5% |
| Export and Packaging Readiness | Proper export documentation and protective packaging reduce customs delays, corrosion, impact damage, and installation problems. | Check commercial documents, packing specifications, moisture protection, lifting points, and shipment inspection photos. | Packaging should protect precision surfaces and include clear identification, handling instructions, and documentation. | 3% |