Mold Risk Assessment & FMEA for Casting Projects – Failure Mode, Effect Analysis and Preventive Countermeasures
FMEA (Failure Mode and Effects Analysis) identifies potential risks before mold manufacturing, Xinfeng Mold implements mold FMEA for all gravity, low pressure and differential pressure casting mold projects. FMEA evaluates risk priority number (RPN) based on failure severity, occurrence probability and detection difficulty of each potential mold failure mode. High RPN items include thermal fatigue cracking, vacuum leakage, core sticking, ejection failure and cavity soldering; these require dedicated preventive design. Many unexpected mold project failures lack pre-risk evaluation; statistics show 45% of serious mold quality incidents occur without FMEA review. For differential pressure molds, sealing aging and parting surface deformation are classified as high-risk failure modes in FMEA worksheet. FMEA worksheet is updated after mold modification; new potential failure modes introduced by structural changes must be re-evaluated. Mold flow simulation and thermal stress simulation are used as detection methods to reduce occurrence probability of high-risk defects. Preventive actions include rounded corner design, replaceable inserts, redundant sealing structure and enhanced cooling layout. FMEA report is shared with customer at design review stage; high-risk items are discussed and confirmed before CNC machining. During mold trial, observed defects are mapped back to FMEA list to verify risk prediction accuracy. FMEA is combined with control plan, defining inspection items, measurement method and acceptance criteria for high-risk positions. Operators and maintenance team receive training on high-risk failure modes, early warning signs and emergency handling methods. Low-risk items remain monitored in routine maintenance without special design modification. FMEA records are archived as part of mold technical package and updated throughout mold life cycle. At mold end-of-life stage, FMEA is reviewed to accumulate experience for next similar mold project.
FAQ
Q1: What three factors calculate RPN in mold FMEA analysis? A1: Severity, occurrence probability and detection difficulty of failure modes. Q2: What percentage of serious mold quality incidents happen without FMEA risk review? A2: 45% serious mold failures occur without prior FMEA evaluation. Q3: What high-risk failure modes are typical for differential pressure casting molds? A3: Sealing strip aging and parting surface deformation are high-risk modes. Q4: When should FMEA worksheet be revised? A4: FMEA must be updated after any mold structural modification. Q5: What tools reduce the occurrence probability of high-risk mold failure modes? A5: Mold flow simulation and thermal stress simulation are used for risk reduction. Q6: At which project stage is FMEA report submitted to customer for review? A6: FMEA report is shared in mold design review phase before machining.
Embedded Keywords: Mold FMEA, Failure Mode and Effects Analysis, RPN Risk Priority Number, Mold Risk Assessment, Preventive Countermeasures, Vacuum Leakage, Thermal Fatigue Cracking, Core Sticking, Mold Control Plan, Design Review
