Wire-Winding Process
The wire-wound coating rod represents the most traditional manufacturing technique for coating metering rods. This process adopts a precision-ground stainless steel mandrel as the base core, with polished stainless steel wire tightly wound around the mandrel at high precision.
The steel wire diameter directly determines the coating wet film thickness, generally following a standard 1:10 ratio. For instance, a 0.015-inch wire diameter can produce a uniform wet film thickness of 0.0015 inches.
The wire-winding process features cost-effectiveness and flexible adaptability, ideal for applications requiring frequent adjustments to coating thickness. However, it still carries potential risks of wire breakage and wire loosening during long-term operation.
Extrusion Process
Extruded coating rods are manufactured using advanced cold extrusion technology. With customized precision dies, continuous and uniformly structured corrugated grooves are directly extruded onto the surface of the stainless steel rod body.
This manufacturing method completely avoids the common defects of wire-wound rods, such as wire breakage and loose winding. It delivers superior dimensional precision and straightness. Meanwhile, the integrated smooth surface enables effortless cleaning and maintenance, making extruded coating rods perfectly suited for high-cleanliness industrial coating processes and strict production environment requirements.