Introduction: Trust, But Verify Hi, I’m Barry Zeng, a manufacturing engineer at Shanghai Yunyan Prototype & Mould Manufacture Factory. In the CNC Machining Industry, trust is earned through data — not promises. When a client receives a batch of precision…
Introduction: The Hidden Weakness in Your Prints Hi, I’m Barry Zeng, a manufacturing engineer at Shanghai Yunyan Prototype & Mould Manufacture Factory. One of the most common failures I see in 3D printed parts is cracking along layer lines. The…
Introduction: The Critical Role of Threading Hi, I’m Barry Zeng, a manufacturing engineer at Shanghai Yunyan Prototype & Mould Manufacture Factory. Internal threads are everywhere — from fastener holes in engine blocks to fluid ports in hydraulic manifolds. Choosing the…
Introduction: When Leaks Are Not an Option Hi, I’m Barry Zeng, a manufacturing engineer at Shanghai Yunyan Prototype & Mould Manufacture Factory. One of the most demanding applications for 3D printed parts is pressure testing — fluid manifolds, pneumatic fittings,…
Introduction: Why Most Sheet Metal Parts Cost More Than They Should Hi, I’m Barry Zeng, a manufacturing engineer at Shanghai Yunyan Prototype & Mould Manufacture Factory. Over the past 12 years, I’ve reviewed thousands of Sheet Metal Part designs —…
Introduction: Where Microns Mean Life and Limb Hi, I’m Barry Zeng, a manufacturing engineer at Shanghai Yunyan Prototype & Mould Manufacture Factory. In the healthcare sector, precision isn’t just a specification — it’s a matter of patient safety. A hip…
Introduction: The 50‑Part Crossroads Hi, I’m Barry Zeng, a manufacturing engineer at Shanghai Yunyan Prototype & Mould Manufacture Factory. One of the most common questions I get is: “I need 50–200 custom parts. Should I invest in injection molding tooling,…
Introduction: From Raw Resin to Finished Product Hi, I’m Barry Zeng, a manufacturing engineer at Shanghai Yunyan Prototype & Mould Manufacture Factory. Raw SLA 3D Painting Surface Finishing parts come off the printer with a matte, sometimes grainy surface. They…
Introduction: Choosing the Right Material for Your Sheet Metal Project Hi, I’m Barry Zeng, a manufacturing engineer at Shanghai Yunyan Prototype & Mould Manufacture Factory. Every week, clients ask me: “Which material should I use for my sheet metal part…