MCD Engineering Group
Matching Sprue Velocity and Using Surface Tension to Stabilize Flow 1. Introduction Most runner systems in metal casting are designed using traditional gating ratios that attempt to manipulate metal velocity at various locations within the system. However, these approaches often overlook the fundamental issue of maintaining consistent flow rate through the sprue and runner system. … Read more
Your pouring basin decides what enters the mold. If your pouring basin is acting like a funnel, it’s doing two things you don’t want: aspirating air, and collecting and delivering oxides/inclusions straight into the sprue. A good pouring basin isn’t a “nice-to-have.” It’s a flow conditioning device. Best practice:Offset pouring basin (not centered over the … Read more
In modern foundry engineering, “design by analysis” has replaced “design by experience” as the foundation of high-integrity casting manufacture. Gone are the days when gating and riser layouts were drawn from rule-of-thumb. Today, every successful casting begins with data — simulation, metallurgical modeling, and a deep understanding of how molten metal behaves as it fills and solidifies. At Metal Casting … Read more
The way molten metal is introduced into a mold directly influences casting soundness, defect rates, and yield. Among the available methods, bottom pouring has proven to be highly effective for minimizing turbulence, improving filling patterns, and enhancing casting quality. The velocity of molten metal at the ingates, which dictates whether the flow is laminar, transitional, or turbulent — and … Read more