Wire-Winding Process
The wire-wound Metering rod is the most traditional manufacturing method. The process involves using a precision-ground stainless steel mandrel as the substrate and winding polished stainless steel wire around it at high speed. The diameter of the wire determines the wet film thickness, typically following a 1:10 ratio; that is, a wire diameter of 0.015 inches can form a wet film 0.0015 inches thick. The wire-wound process is relatively low-cost and suitable for applications requiring frequent changes in coating thickness, but there is a risk of wire breakage or loosening
Extrusion Process
Extruded metering rods utilize advanced cold extrusion technology. Under the action of precision dies, continuous, uniformly shaped corrugated grooves are directly extruded onto the surface of the stainless steel rod. This process eliminates the issues of wire breakage or loosening associated with the wire-winding process, offering higher precision and straightness. Additionally, the smooth surface facilitates easy cleaning, making it particularly suitable for coating processes with high cleanliness requirements.