HONGYI

Quality Inspection

How to Specify Cosmetic Surfaces and Acceptable Tool Marks on CNC Machined Parts

2026-09-29
Learn how to specify CNC cosmetic zones, acceptable tool marks, Ra roughness, secondary finishes, inspection conditions, and complete RFQ details.
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How Should You Specify Surface Roughness (Ra) for CNC Machined Parts?

2026-09-29
Learn how to specify Ra by surface function, material, geometry, machining process, tolerance, finishing method, inspection scope, and RFQ requirements.
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Hot Runner vs Cold Runner Molds: Which System Fits Your Plastic Part?

2026-09-29
Compare hot and cold runner molds by resin, gate geometry, tolerances, tooling cost, maintenance, changeovers, inspection, and RFQ requirements.
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Rapid Tooling vs Production Molds: Which Should You Choose?

2026-09-29
Compare rapid tooling and production molds by resin, geometry, tolerances, demand, inspection, tooling risk, total program cost, and RFQ needs.
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Drilling vs Reaming vs Boring: How Should You Specify Precision Holes?

2026-09-29
Learn when to specify drilling, boring, or reaming and how to define hole size, position, finish, inspection, and RFQ requirements…
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How Should You Plan Undercuts, Slides, and Lifters for Injection Molded Parts?

2026-09-29
Plan injection mold undercuts, slides, and lifters by pull direction, travel, clearance, sequencing, tooling risk, sample approval, and RFQ data.
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How Should You Specify Tolerances for Metal Stamped Parts?

2026-09-29
Learn how to specify metal stamping tolerances by feature, material, process route, springback, datum strategy, inspection scope, and RFQ details.
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How Should You Specify Parting Lines, Ejector Marks, and Gate Vestiges?

2026-09-29
Learn how to specify parting lines, ejector marks, gate locations, vestige limits, cosmetic zones, inspection criteria, and mold RFQ requirements.
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What Production Volume Justifies Progressive Die Stamping?

2026-09-29
Learn when progressive die stamping may justify its tooling by comparing annual volume, geometry, material, tolerances, forecast risk, and total…
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Single-Cavity vs Multi-Cavity vs Family Molds: Which Strategy Fits Your Project?

2026-09-29
Compare single-cavity, multi-cavity, and family molds by demand, resin, geometry, tolerance, tooling risk, inspection scope, and total program cost.
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