Take wire winding as an example. The steel wire of the smallest US RDS coating rod is smaller than a human hair, and laboratory engineers need to prepare hundreds of samples a day. Abrasion, abrasion and unclean cleaning will cause the wet film of the actual coating rod to change. Small, most users choose better new coating rods for this. According to the big data of NBCHAO Mall, the average replacement cycle of customers for coating rods is 6.7 months. (It should be pointed out that the frequency of use of the coating rod, the influence of the substrate on the wear of the coating rod and the maintenance method have a great impact on the replacement cycle)
Another consideration is that if the purpose of coating is that the accuracy of the coating thickness is not high, the service life of the coating rod can be extended appropriately. On the contrary, if it is for the precise preparation of the wet film, it is recommended to replace the new coating in time. Cloth rods, and better purchase of impression beds , while ensuring better reproducibility, also play a certain role in buffering the contact between the coating rod and the substrate, killing two birds with one stone.
