Core TS16949 Control Points for Auto Parts Molds
Molds are the key tooling to guarantee the dimensional precision, appearance quality and stable mass production of automotive plastic parts, and they are the core control object of the TS16949 automotive quality management system. Centered on risk prevention, full-process traceability and continuous improvement, TS16949 formulates standardized control requirements covering the whole mold life cycle from early APQP development, trial molding verification, mass production operation to modification and scrapping. Standardized mold management can effectively eliminate batch defects, production fluctuation and delivery risks caused by mold failure, and meet the high reliability and full traceability supply standards of vehicle manufacturers.
1. APQP Synchronized Control in Early Mold Development
Carry out closed-loop management of all customer input documents including 3D models, dimensional tolerances, PPAP requirements and mold life standards. All customer technical changes shall go through ECN change procedures, and all mold drawings and BOMs shall be updated synchronously with complete archives. Link DFMEA and mold PFMEA to identify failure modes such as cavity wear, blocked cooling channels and stuck ejector pins, and add foolproof structures for high-risk positions.
The design output shall include mold flow analysis, strength check and cooling layout scheme; all mold steel and standard parts shall provide material certificates and heat treatment reports. Product inspection jigs shall be developed synchronously with molds, and MSA measurement system analysis shall be carried out regularly to ensure stable detection of mold-induced defects.
2. Machining, Trial Molding and PPAP Archive Control
All key mold parts such as mold inserts and sliders retain complete processing, heat treatment and hardness testing records. Implement standardized T0/T1/T2/T3 staged trial molding, record molding parameters, defect lists and mold rectification schemes for each trial, and retain marked test samples. After T3 stable trial molding, sort out all mold supporting documents for PPAP submission, including mold drawings, material certificates, mold flow reports and life cycle verification records, with one-to-one corresponding mold numbers and product part numbers. Complete mold life cycle test according to customer requirements, and formulate insert replacement and mold refurbishment plans before reaching the service life limit.
3. Mold Storage, Identification and Daily Mass Production Operation Control
Each mold is engraved with permanent unique identification including part number, cavity quantity and maintenance cycle; supporting spare parts and tools are stored with the mold to avoid loss. The mold storage area keeps constant temperature and humidity for anti-rust protection, and molds are divided into mass production molds, trial molds and to-be-repaired molds for isolated management. Establish complete inbound and outbound ledgers to record mold online, offline and maintenance status with full traceability.
Implement pre-production inspection before each shift, and fill in inspection records to stop production immediately if abnormal conditions such as water leakage and stuck ejector pins occur. Build a complete TPM preventive maintenance system including daily cleaning, periodic disassembly and long-term refurbishment, and record all maintenance content and replaced spare part certificates. Equip each mold with a cycle counter to track wear trends, and fill in 8D reports for serious mold damage accidents to complete root cause analysis and rectification closed loop.
4. Mold Modification, Foolproof Safety and Document Traceability Control
All mold structural changes shall go through ECR/ECO approval procedures, and complete re-testing and document updating after modification. Sign quality agreements with qualified external mold repair suppliers, and conduct full inspection and trial molding verification after the mold returns to the factory. Formulate clear mold refurbishment and scrapping judgment standards, and permanently archive all scrapping review records.
Add foolproof positioning structures such as anti-reverse inserts and limit sensors to the mold to prevent mixed defective products. Regularly calibrate measuring tools for mold wear detection and carry out GRR analysis to ensure reliable measurement data. Build an independent file for each mold, storing all design, processing, maintenance, failure and change records, and retain the files for at least 10 years after mold scrapping to meet automotive industry traceability requirements. Special TS16949 internal audit checklists are used to inspect mold management execution, and CAPA corrective measures are issued for unqualified items.
Summary
TS16949 mold management for auto parts runs through the whole life cycle of mold development, manufacturing, mass production and scrapping. The core management logic is to realize risk prevention in advance, standardized process execution and full-data traceability. Strictly implement APQP synchronous development in the early stage, standardize trial molding and PPAP document management in the manufacturing stage, establish a complete inspection and preventive maintenance system during mass production, and control mold modification, foolproof and file archiving in the whole process. This set of standardized control can effectively reduce mold failure frequency, stabilize product quality, fully meet the audit requirements of vehicle manufacturers, and realize long-term stable mass production of automotive parts.
