Fan blades are essential components in various appliances such as fans, cooling fans, and air conditioners. The core objective of a fan blade mold is to produce blades with high efficiency, low noise, and long service life. Therefore, fan blade molds are representative of high-end tooling where precision determines performance.

First, all design aspects of a fan blade mold must serve the three key performance indicators of the blade: 1. Achieve airflow under the same power consumption. 2. Minimize noise. 3. Maintain dynamic balance to ensure stability during high-speed rotation (thousands of revolutions per minute), preventing wear and resonance caused by minor imbalances.

The surface of a fan blade is curved, with edges featuring arcs, and the precision requirement often reaches ±0.03mm or even higher. Any machining error can disrupt the blade's balance. Thus, fan blade molds require high-precision machining: it is essential to use five-axis high-speed CNC milling for fine machining. This demands top-tier machine accuracy, toolpath planning, and programming expertise.

Fan blades typically have uneven wall thickness, with the edges being the thinnest. Uneven cooling can lead to shrinkage and warping. Moreover, it is crucial to ensure that every blade produced is identical in weight and shape. Even a few milligrams of weight variation in a single blade can cause severe vibration during high-speed rotation. Therefore, KELONG MOULD implements absolute symmetry and balance in mold design: comprehensive mold flow analysis must be conducted before mold opening to accurately predict issues, optimize gate locations, cooling channels, and pressure-holding curves, addressing problems at the design stage.

The runner design of the mold must ensure absolutely uniform filling of each blade. Precision venting slots are incorporated at the parting lines, insert interfaces, and ejector pins to achieve  filling. We create conformal cooling channels inside the core that closely follow the blade's curved surface, enabling synchronous and uniform cooling.

To enhance blade strength, customers often incorporate additives such as calcium carbonate and glass fibers during production. These materials are corrosive. Therefore, we use high-hardness, high-wear-resistant mold steel and apply nitriding treatment to ensure zero wear in the cavity during long-term production, maintaining precision over time. We design sophisticated ejection mechanisms composed of angled lifters and sliders to ensure the blades are released undamaged from the complex cavity. Additionally, we employ a precision inspection system: not only are dimensions checked, but the blades undergo full-surface scanning and comparison, and dynamic balancing machines are used to test blade balance. This ensures the blades produced are stable in quality and operate silently.

KELONG MOULD is a professional fan blade mold manufacturer, offering integrated solutions from mold manufacturing to product production for our clients.

We guarantee the ability to produce high-quality blades even after millions of injection molding cycles. If you are interested, please contact us.

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