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Precision Injection Molding: Tolerance Control and Quality Assurance

Introduction

Precision injection molding requires tight tolerance control and rigorous quality assurance.

Tolerance Standards

ISO 20457 Standards define tolerance levels: Level 1 (Ultra-precision): +/-0.025mm per 100mm, Level 2 (High precision): +/-0.050mm per 100mm.

Mold Design

Cavity machining accuracy: +/-0.005-0.010mm. Uniform cooling is critical for dimensional stability.

Quality Assurance

CMM: +/-0.001mm accuracy. SPC charts monitor process stability.

Conclusion

Precision injection molding requires careful attention to mold design, material selection, and process control.

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