Mold File Management: A Key to Quality Traceability

A mold file records every critical stage of a mold's life — from design and manufacturing to maintenance and eventual retirement. Without proper documentation, quality becomes impossible to trace. So how should mold file management be implemented? Below are the key areas to focus on.

1. Drawing File Management Standards

• Confidentiality

Use servers and security software to ensure that technical data cannot be copied or leaked without authorization.

• Version control

Electronic documents and drawing files must be clearly versioned to make them easy to find and trace, preventing the use of wrong design versions.

2. Drawing Change Control

Drawing changes must be strictly controlled according to file management requirements. Uncontrolled copying of drawings should be prevented, as it leads to no records of distribution and no recovery of old versions.

3. Information Management in the Engineering Department

Use standardized forms or share design standards and reference data. Modern mold design is evolving rapidly. Engineering departments must stay updated with the latest mold technologies and continuously improve their practices.

4. Knowledge Retention in Mold Companies

The technical expertise of a company should be summarized, refined, documented, and archived by designated personnel. This prevents the loss of intellectual assets when employees leave. Archived documents can serve as design references and training materials for new engineers.

5. Trained Document Controllers

Document control personnel must receive proper training before taking on the role.

6. One Mold, One File – Complete Documentation

Every mold must have its own complete file. The mold file should include the following:

Customer and project information

• Customer contract and technical agreement

• Mold quotation

• All customer-provided data: 3D models, 2D part drawings, plastic material name and grade, molding shrinkage, number of cavities, gate type and location, hot runner specifications, standard part requirements, marking requirements (environmental marks, date marks, cavity numbers and positions), surface finish requirements, assembly requirements

• Mold steel specifications

• Injection machine technical parameters (tie bar spacing, ejection system, robot compatibility)

• Customer's mold design standards and drawing conventions (first‑ or third‑angle projection, number of drawing copies)

• T0 sample timing and expected mold service life

Mold design and manufacturing records

• Mold material list (including mold base, standard parts, wear parts, spare parts, heat treatment certificates)

• Mold design drawings: CAE mold flow analysis report, 3D model, 2D part drawings, assembly drawings, process drawings, electrode drawings, wire‑cut EDM drawings

• Machining hours and design change records

Testing, inspection, and modification records

• Trial molding records and process parameters

• Inspection reports for molds, key components, and molded parts

• Modification notices

• Mold acceptance reports

• Mold photos

• Error correction notices and associated costs

• Customer design change records

Post‑delivery documentation

• Mold design summary report

• Actual cost analysis report

• Customer quality feedback form

Packing list and accessories

• Certificate of conformity

• Instruction manual

• Maintenance manual

• Related drawings

• List of spare parts and wear parts