📋 Quick Summary
Quality control is the foundation of reliable mold manufacturing. Key QC standards include material verification, dimensional inspection, surface finish standards, functional testing, and complete documentation.
1. Material Verification
All raw materials require certification and traceability. Steel grades, hardness, and heat treatment must be documented before machining begins.
Material Verification Process
- Certificate of Analysis (CoA) review
- Spectrometry for alloy composition
- Hardness testing (Rockwell/Brinell)
- Heat treatment records verification
2. Dimensional Inspection
Coordinate measuring machines (CMM) verify critical dimensions throughout manufacturing. First article inspection confirms mold components meet design specifications.
Inspection checkpoints
| Stage | Inspection Type |
|---|---|
| Raw Material | Material verification |
| Rough Machining | Stock allowance check |
| Finish Machining | Full CMM inspection |
| Final Assembly | Functional validation |
3. Surface Finish Standards
Mold cavity surfaces require specific finishes based on part requirements. SPI finish standards (A1-D3) provide consistent benchmarks.
SPI Surface Finish Standards
| Grade | Finish | Application |
|---|---|---|
| A-1 | Diamond buff, glossy | Optical lenses |
| B-1 | Fine grit paper | Cosmetic parts |
| C-1 | Fine stone | Textured surfaces |
| D-1 | Blasted/satin | Non-cosmetic |
4. Functional Testing
Trial runs validate mold performance under production conditions. Monitor cycle times, part quality, and ejection consistency.
Testing Parameters
- Cycle time optimization
- Part dimensional verification
- Ejection force measurement
- Cooling efficiency validation
- Gate vestige evaluation
5. Documentation and Traceability
Complete documentation includes design files, inspection reports, material certs, and maintenance records. Digital systems enable quick retrieval and analysis.
Required Documentation Package
| Document | Purpose |
|---|---|
| Design Files (3D/2D) | Reference for modifications |
| FAI Report | First part validation |
| Material Certs | Traceability |
| Maintenance Manual | Long-term care |
Conclusion
Investing in comprehensive quality control pays dividends through reduced rework, longer mold life, and customer satisfaction.
Quality You Can Trust
Tuohai Technology follows strict QC standards for every mold!
📧 Email: [email protected]
📱 WhatsApp: +8613037600603
📍 Address: Rm. 2-2502, No. 63 Qinling Road, Zhengzhou, Henan, China