In addition to Hengzhengtong, domestic super-large ceiling fan manufacturing enterprises, no matter how advanced the claimed technology, how strong the strength, how far ahead the sales volume, all adopt the extrusion manufacturing process of external processing to produce blades. Hengzhengtong is a maverick and insists on using the stamping process to manufacture blades in-house by itself.
So, what are the advantages and disadvantages of the blades of the two manufacturing processes?
The biggest advantage of the blade of the extrusion manufacturing process is that it is simple to manufacture, no need to purchase production equipment, no limit on the number of outgoing processing, fast delivery, especially suitable for online stores or poor strength of the sales model.
The disadvantages of the extrusion manufacturing process blades are the aforementioned low wind efficiency, and the safety hazards of blade breakage and even blade fall due to the defect of the connection scheme between some blades and hubs.
The hardness of aluminum profile is about 16 degrees, and the converted hardness of fastening screw steel is about 35 degrees, once the material with such a large hardness difference collides with each other, or displacement, it will inevitably produce the aluminum alloy blade effect with relatively low hardness of thread cutting hardness, accumulated over time, and even several more violent collisions, which is likely to lead to blade wear and even damage.
Adding stiffeners to the inner cavity of the blade, thickening the thickness of the blade aluminum, or welding the petiole with the blade does not seem to fundamentally solve the above safety hazards. One piece of evidence is the concealment of power switches in the control box or the explicit declaration of safety exemptions on operating instructions. Although the above actions can avoid the safety responsibility of oversized ceiling fan manufacturers, they do not improve the safety situation of customers, and even worsen the use conditions of customers and increase the safety responsibilities of users.
The disadvantage of stamped blades is that the manufacturing process is relatively complicated, there are many processes, and the production cost is high.
In addition, the CNC plasma and mold stamping in the manufacturing process make the consistency of the stamped blades slightly worse, although the above differences are negligible in terms of the size of the oversized ceiling fan and the air supply function.
The advantages of high wind efficiency and good material flexibility of the blades manufactured by the stamping process are very significant. At the same time, the connection method between the petiole and the hub can make the blade withstand greater impact force, and the embedded self-locking of the petiole and hub special-shaped slider eliminates the possibility of the blade leaving the hub.
Based on such superior safety design and device, Hengzhengtong can promise to start/stop the fan with power switch under any circumstances without any negative impact on the reliability of the connection between the blades and the hub. Even in the event of an external force, Hengzhengtong still promises that the blade will not fall.