Control Technology of Injection Molding Flash in MIM Manufacturing
Views: 15 Author: Site Editor Publish Time: 2025-05-12 Origin: Site
In the field of Metal Injection Molding (MIM), injection molding flash is a critical quality indicator affecting product dimensional accuracy and assembly performance. As a professional provider of MIM technical solutions, MIMO Metal has established a complete flash control system through systematic engineering methods to ensure products meet the rigorous requirements of high-end application fields.
1. Engineering Definition and Impact Analysis of MIM Injection Flash
1.1 Professional Definition
Injection molding flash in MIM refers to the height deviation at the cavity joint surface caused by insufficient mold matching precision, material shrinkage differences, or improper process parameter settings. Specific manifestations include:
Step height at parting surface joint (typical value >0.02mm)
Surface depressions caused by ejection systems
Dimensional consistency deviation between multi-cavity molds
1.2 Quality Impact Assessment
Dimensional Accuracy: Affects the f-grade precision requirements in ISO 2768.
Assembly Performance: Leads to failure of interference fit or clearance fit.
Surface Treatment: Influences the uniformity of subsequent PVD/CVD coatings.
Fatigue Life: Stress concentration points may reduce product durability.
2. MIMO's Engineering Technology System for Flash Control
2.1 Digital Design Optimization
Fill simulation using Moldflow analysis software
Implementation of DFM (Design for Manufacturing) review mechanism
Establishment of Tolerance Stack-up analysis model
2.2 Precision Manufacturing Assurance
Slow wire cutting for mold processing (precision ±0.002mm)
Five-axis 联动 (five-axis simultaneous) machining centers for cavity finishing
Application of SPC (Statistical Process Control) method
2.3 Advanced Process Control
Monitoring Direction
Control Standard
Monitoring Means
Injection Pressure
±1% of set value
Piezoelectric sensor
Mold Temperature
±0.5℃
Infrared thermal imager
Pressure Holding Curve
5-stage precision control
Servo closed-loop system
2.4 Full-process Quality Monitoring
On-line measurement: Equipped with CMM (Coordinate Measuring Machine)
Process capability index: Ensuring CPK ≥1.67
Establishment of a complete quality traceability system
3. Technological Innovation Achievements
Through the implementation of the above control system, MIMO has achieved breakthroughs in the following technical indicators:
Parting surface flash controlled within ≤0.015mm
Within-batch dimensional consistency CV value <0.5%
First-pass yield rate increased to 99.2%
4. Application Case
A medical implant project adopting MIMO's flash control solution:
Assembly force fluctuation range reduced from ±15N to ±3N
Surface roughness Ra improved from 0.8μm to 0.4μm
Product service life increased by 30%
Conclusion
MIMO Metal will continue to invest in R&D to improve flash control technology in MIM molding, providing customers with more competitive precision manufacturing solutions. We invite industry partners to jointly explore and accelerate the technological innovation and industrial application of MIM processes in high-end manufacturing fields.
Note: The data in this article is based on MIMO's internal testing standards. For specific technical parameters, please consult our engineering team.
MIMO's products do not only serve customers all over China, but it also provides MIM products for more than 40 countries and enterprises in the World, including the United States, the Netherlands, Norway, Pakistan and so on.
