| Appliance Format | Common nominal cabinet-width formats include approximately 450 mm for slimline units and 600 mm for full-size units. | The selected format affects door panels, tubs, control panels, baskets, mounting brackets, and the overall tooling envelope. | Freeze the target installation width, height, depth, panel gaps, and mounting interfaces before detailed mold design. | CAD and layout review |
| Plastic Part Tolerances | ISO 20457 provides tolerances and acceptance conditions for plastics moulded parts. The applicable tolerance class must be agreed for each part. | A defined tolerance system prevents suppliers from applying inconsistent assumptions to seals, clips, guides, and cosmetic parts. | State the tolerance class, critical dimensions, shrinkage assumptions, and measurement temperature in the part drawing. | Dimensional inspection report |
| Geometric Tolerancing | ISO 1101 defines geometrical tolerancing principles, while ISO 5459 defines datums and datum systems. | Datum consistency is essential for door alignment, hinge locations, gasket compression, and the fit between molded and stamped parts. | Use one approved datum structure across the product drawing, mold drawing, inspection fixture, and supplier measurement report. | CMM or fixture inspection |
| Quality Management | ISO 9001 establishes requirements for a quality management system, including controlled processes, records, corrective action, and change management. | Tooling quality depends on repeatable design, machining, assembly, trial, inspection, and documentation processes. | Request process ownership, inspection records, nonconformance handling, and documented engineering-change procedures. | Supplier audit and records review |
| Sampling Inspection | ISO 2859-1 provides sampling procedures indexed by acceptance quality limit, or AQL. The AQL and inspection level must be agreed rather than assumed. | Sampling plans help control incoming molded parts, stamped brackets, machined components, and replacement tooling components. | Define the lot size, inspection level, critical defect rules, and acceptance criteria in the purchase and quality documents. | Approved inspection plan |
| Product Safety Interface | IEC 60335-1 covers general safety requirements for household electrical appliances, while IEC 60335-2-5 applies specifically to household dishwashers. | Tooling can affect insulation barriers, cable routing, water protection, grounding interfaces, and the stability of safety-critical molded parts. | Identify safety-related features and prohibit unauthorized changes to wall thickness, ribs, bosses, sealing surfaces, or clearances. | Design review and safety testing |
| Material Identification | Resin, elastomer, and metal specifications should include the material grade, approved alternatives, color requirements, and applicable regulatory documentation. | Material changes can alter shrinkage, warpage, weld-line strength, chemical resistance, surface finish, and tool wear. | Require resin certificates, lot traceability, drying conditions, recycled-content limits, and written approval for substitutions. | Material certificate and lot records |
| Mold Design Data | A production-ready tooling package normally includes a 3D mold assembly, 2D detail drawings, bill of materials, cooling layout, runner or gate design, and spare-parts list. | Complete technical data allows the tool to be maintained or transferred without relying on undocumented supplier knowledge. | Define file formats, revision rules, drawing units, naming conventions, ownership, and delivery timing before tool release. | Tooling document checklist |
| Mold-Filling Compatibility | Gate location, flow length, wall-thickness transitions, venting, cooling, and expected shrinkage must match the selected resin and injection process. | Poor compatibility may produce short shots, sink marks, warpage, burn marks, weld-line weakness, or excessive cycle time. | Review mold-flow results or equivalent engineering evidence for critical parts before steel is committed. | Mold-flow or trial validation |
| Machine Compatibility | The tool must be compatible with the available machine's clamping force, platen dimensions, tie-bar spacing, injection capacity, ejector stroke, and mold-height range. | A geometrically correct tool may still be unusable if it cannot be installed, clamped, injected, cooled, or ejected safely. | Exchange the machine specification sheet and confirm it before finalizing mold base size and connection locations. | Machine-tool compatibility check |
| Trial and Acceptance | Tool acceptance should cover dimensional conformity, appearance, function, cycle time, process window, repeatability, and agreed production quantity. | A tool that produces only one acceptable sample may not be stable enough for global production or multi-site sourcing. | Define T0, T1, and production-validation expectations, including sample quantity, defect limits, and correction responsibility. | Approved trial report |
| Supplier Coordination | A controlled workflow should include design review, DFM feedback, quotation, tool release, trial scheduling, inspection, correction, and final approval. | Clear handoffs reduce interpretation differences across time zones, languages, engineering teams, and manufacturing locations. | Assign one revision-controlled specification, a responsibility matrix, response deadlines, and formal approval gates. | Milestone tracker |
| Change Control | Every change should identify the affected drawing revision, reason, date, approver, tooling impact, validation requirement, and remaining inventory. | Uncontrolled changes can create mismatched parts between countries, plants, tools, or production batches. | Do not authorize steel modification, material substitution, or process change without written engineering approval. | Engineering change record |
| Maintenance and Transferability | The maintenance package should include wear-part drawings, recommended inspection intervals, lubrication points, spare-part identification, and repair history. | Maintenance-ready tooling supports long-term production and reduces dependence on the original manufacturing location. | Require tool-room documentation, replacement-part specifications, corrosion protection instructions, and preservation requirements. | Maintenance audit |