Appraisal of coater quality

coating machine is a kind of equipment used for the surface coating process of film, paper and other substrates. It uses a dedicated multi-functional coating head to evenly apply specific glue, paint or ink on the substrate, and then goes through the drying process and is finally cut into pieces or rolled up. The
coating machine is equipped with a full-speed automatic film splicing mechanism and PLC program tension closed-loop automatic control, which can realize various forms of surface coating. In addition, coaters are also widely used in lithium battery production lines to coat electrode active materials on the positive and negative electrode materials of the battery to ensure that the electrode materials are evenly and consistently coated on the electrode sheets to improve battery performance and energy density.
In coating machine quality appraisal cases, Zhongke Testing can provide coating machine quality appraisal services.

coating operations are divided into on-machine type and off-machine type according to the relationship between the coating machine and the paper machine. According to the number of coatings, it is divided into single-layer coating and double-layer coating.
In-machine coating is a coating machine installed on the paper machine, so that papermaking and coating can be carried out continuously; in external-machine coating, the coating machine and paper machine are independent. There are three main types of coating machines used for coating operations: Kun-type coater, air knife coater and blade coater.

JB/T 14230-2022 Lithium ion battery pole piece coating machine
JB/T 12375-2015 Printing machinery Metal sheet flat coater
JB/T 11118-2010 Printing machinery Screen coating machine
QB/T 1342-1991 Bridge type single-sided hot air drying air knife coating machine

was entrusted by the court to conduct an appraisal and analysis on "whether there are quality problems" with the continuous coating machine involved in the case.
appraisal analysis results:
appraisal analysis The expert group appraised the mechanical, electrical, and accessories quality of the continuous coating machine, automatic high vacuum oven and all equipment involved in the case:
The installation of exhaust fan circulating air in the structural configuration of the drying box There are inconvenient operations. The insulation at the connection between some fans and pipelines is missing. There is material leakage in the connection section of the segmented oven, which poses hidden dangers to the use of the equipment involved. The power of the circulation fan of the automatic high vacuum oven and the wall thickness of the inner tank material do not meet the requirements agreed in the "Updated Technology Agreement". The touch screen has a high failure rate and cannot guarantee stable and continuous operation.