Operation demonstration of slit coating machine [including video explanation]

overview

The precision coating technology in which the coating liquid is squeezed and sprayed along the gap of the coating mold under a certain pressure and a certain flow rate and transferred to the substrate is called slot coating.

Compared with other coating methods, slot coating has the advantages of fast coating speed, high precision, and uniform wet thickness. And the system is closed to prevent contamination from entering during the coating process.

The slurry utilization rate is high, the slurry performance can be kept stable, and multiple layers can be coated at the same time. Coating is achieved by controlling the speed, accurately metering and pumping the process fluid. During the coating process, the coating tool moves precisely relative to the substrate.

Advantages and disadvantages

Advantage:

• High utilization rate of coating solution;

• Wide range of coating liquid viscosity;

• Good film thickness consistency;

• Fast coating speed;

• Fewer coating defects (closed loop system);

• Three layers of coating can be carried out at the same time.

shortcoming:

• High requirements for installation and operation;

• high equipment cost;

• The coating head has high precision and high maintenance cost;

• It requires high technical knowledge of the operator.

Video explanation