Reduction of chemical emissions by introducing a coating treatment device

Toshiba Elevator (SHENYANG) Co., Ltd.

Toshiba Elevator (SHENYANG) Co., Ltd. manufactures motors for standard elevators. Previously, the bolts that attach the brake to the motor body were coated with rust-proof paint using a brush and then allowed to dry naturally. However, this method had a number of problems, including the fact that the organic solvents contained in the paint and brush cleaning put a strain on the health of workers and the environment, the process was inefficient, much paint was wasted, the drying time was long, and the finished quality was not good.
Thus, the company designed and built an automatic coating treatment device using scrap iron plates and magnets for the dust collector that had been sitting idle. Inside a sealed coating room, a magnetic board that attracts bolts by magnetic force is raised and lowered, and after the bolts are dipped directly into the paint, they are forcibly dried by an electric fan. The air in the paint room is passed through a dust collector with activated carbon filtration to absorb the organic solvents before release into the atmosphere.
This device ensures workers’ health and reduces the risk of environmental pollution. In addition, the amount of paint used was reduced by approximately 33% compared to before making the improvements, and the time required to complete the work was reduced by approximately 84%. Furthermore, quality improvements were achieved, such as elimination of uneven coating.