Published: May 28, 2026 | By TakumiTech® Quality Assurance Team | Reading Time: 9 minutes
Quality assurance is critical in injection molding. Even minor defects can lead to part failure, assembly issues, or customer dissatisfaction. At TakumiTech®, we implement comprehensive quality control processes at every stage of production to ensure every part meets or exceeds specifications.
Our Quality Management System
TakumiTech® maintains multiple quality certifications and follows strict quality protocols:
- ISO 9001:2015: Comprehensive quality management system
- IATF 16949: Automotive quality standard (zero-defect focus)
- ISO 13485: Medical device quality management
- ISO 14001: Environmental management system
- RoHS/REACH Compliance: Environmental and chemical compliance
Incoming Material Inspection
Quality control begins with raw material verification:
- Material Certificates: Verify material grade, lot number, and properties
- Visual Inspection: Check for contamination, moisture damage, or discoloration
- Melt Flow Index: Verify material flow characteristics
- Moisture Content: Test and dry materials to specification
- Supplier Qualification: Regular audits of material suppliers
In-Process Quality Control
Continuous monitoring during production ensures consistent quality:
First Article Inspection (FAI)
- Complete dimensional inspection of first 5 parts
- Visual inspection for surface defects
- Functional testing for fit and assembly
- Documentation of all critical dimensions
- Customer approval before full production
Statistical Process Control (SPC)
- Real-time monitoring of critical process parameters
- Control charts for dimensional characteristics
- Cpk analysis for process capability (target: Cpk > 1.33)
- Automatic alerts for out-of-control conditions
- Trend analysis for predictive quality management
Automated Visual Inspection
- Machine vision systems inspecting 100% of production
- Defect detection: short shots, flash, burns, contamination
- Dimensional measurement with sub-micron accuracy
- Automatic part sorting and rejection
- Data logging for traceability and analysis
Final Inspection and Testing
Comprehensive final inspection ensures only conforming parts ship:
Dimensional Inspection
- CMM Inspection: Coordinate measuring machines for complex geometries
- Optical Comparators: Quick check of critical dimensions
- Go/No-Go Gauges: Functional verification of critical features
- 3D Scanning: Complete surface analysis for complex parts
- Microscopy: Detailed inspection of small features and defects
Functional Testing
- Fit and assembly testing with mating components
- Load testing for structural components
- Pressure testing for fluid handling parts
- Electrical testing for conductivity and insulation
- Environmental testing (temperature, humidity, UV)
Reliability Testing
- Accelerated life testing for durability verification
- Fatigue testing for cyclic loading applications
- Chemical resistance testing for harsh environments
- Flammability testing for safety-critical applications
- Aging studies for long-term performance prediction
Documentation and Traceability
Complete documentation ensures full traceability:
- Material Traceability: Link every part to material lot and supplier
- Process Records: Document all process parameters for every production run
- Inspection Records: Maintain all inspection data for minimum 10 years
- Certificates of Conformance: Provide with every shipment
- PPAP Documentation: Complete production part approval packages for automotive
Continuous Improvement
Quality is not static—it’s a journey of continuous improvement:
- Regular quality reviews and root cause analysis
- Corrective and preventive action (CAPA) system
- Employee training and certification programs
- Equipment calibration and maintenance schedules
- Customer feedback integration into quality processes
Quality Metrics
We track and publish key quality metrics:
- First-Pass Yield: 99.5%+ (industry average: 95-97%)
- Customer Complaint Rate: Less than 50 PPM
- On-Time Delivery: 98%+ of orders shipped on time
- Process Capability (Cpk): Average 1.67 (target: 1.33 minimum)
- Internal Scrap Rate: Less than 2%
Conclusion
Quality assurance is not just a department at TakumiTech®—it’s a culture that permeates every aspect of our operations. From incoming material inspection to final shipment, we implement rigorous quality control processes to ensure every part meets the highest standards.
Our commitment to quality is reflected in our certifications, our processes, and most importantly, in the satisfaction of our customers worldwide.
Have quality-critical injection molding needs? Contact TakumiTech® to learn how our quality systems can benefit your project.