Why Has The Extrusion-type Meyer Rod Gradually Replaced The Winding-type Meyer Rod?
Publish Time: 2026-11-04 Origin: Site
The reason for the gradual replacement of the winding-type Meyer rod by the extrusion-type is that it is more convenient and suitable for precise coating. Both can be used for line rod coating, but the extrusion-type has obvious advantages in the production environment.
1. No threads, no loosening, no breakage
The winding-type forms gaps by winding steel wires, and over time, it may wear, loosen, or break the wire; the extrusion-type is an integrated groove formed as one piece, without wire joints, and operates more stably.
2. Easy cleaning
The steel wires in the winding-type are prone to trapping coatings, which are difficult to clean after drying; the extrusion-type is a smooth U-shaped continuous groove, less likely to get stuck, and easier to clean.
3. More stable film thickness
The extrusion groove has good consistency in size, suitable for high-speed continuous production and ultra-thin coatings. It is particularly suitable for scenarios with high requirements such as lithium battery separators, photoresist, and high-end inks.
4. Lower maintenance cost
The winding-type has a shorter lifespan in abrasive coatings and frequent replacement of rods will increase downtime; the extrusion-type is more wear-resistant, has a longer lifespan, and is more suitable for continuous production.
However, the winding-type has not been completely eliminated. It has a lower cost, a wide range of models, and strictly follows the traditional Meyer rod principle, so many laboratories still retain it to ensure consistent historical test conditions. When replacing, it is important to note that the winding-type forms a V-shaped gap, while the extrusion-type has a U-shaped groove, and the flow of coatings is different. Under the same nominal film thickness, the actual coating amounts of the two will differ due to different flow patterns.
Therefore, after changing the process, it is best to revalidate the film thickness and coating amount.