Our company designed and built an electrostatic coating production line for a smart door lock company. As the customer's production capacity increased, the external coating could not keep up with the construction schedule. We built a coating line for him to improve the efficiency of product production and make the product cost more controllable. 6 processes and 7 manual workers can realize the operation of the entire assembly line to meet the customer's production needs. It solved the customer's need to increase production capacity and was recognized by the customer. The customer has been cooperating since 2022.