| 摘要 |
PURPOSE: A life extension method for a wooden door using a height adjustment device is provided to extend the life of a wooden door by using a height adjustment device installed on the top with a spring, coating the surface, and obtaining strong rustproof properties. CONSTITUTION: A life extension method for a wooden door using a height adjustment device comprises the following steps: attaching a height adjustment device which comprises a case, a coil spring, a cap, a rod, a connection member, and a roller on the top of a wooden door; and coating the surface of the wooden door to form a coating layer which contains phosphate, titanium dioxide as an inorganic substance, and red clay. The coating layer contains 3-5 parts by weight of titanium dioxide and 5-10 parts by weight of red clay based on 95-97 parts by weight of phosphate. |
