옻칠 고온경화기법을 활용한 알루미늄 표면장식에 관한 연구

This study aims to identify film formation, intensity and adhesion degree of the high temperature hardening technique of a Otchill according to a surface texture of aluminum and a high temperature hardening environment. Aluminum has advantages over other metals, for instance, lighter weight, more excellent machinability and relatively cheaper price. Therefore, it is widely used in metallic furniture, lighting devices or stylish accessories because it is suitable for not only a general industrial material but also metallic molding works. In order to fabricate a specific conformation shape by processing aluminum plates, it is required to perform several different works on the plates such as cutting, bending, hammering formation and welding. If an anodic oxidation method is applied in such a welded part of the fabricated object, a stain occurs to cause problems in representing the color wanted. Although, of course, there is a way to represent the color of work through a painting of synthetic resin paints, it is not sufficient as a finishing surface coloring technique of metallic formation works. In this regard, the researcher has studied on the surface treatment method of aluminum that is a luxurious and highly value added material, and that can be applied in a sheet metal formation works.
Many metal craftsmen use a variety of methods for various representations of colors. Of those, it is sometimes possible to see that a Otchill, which is a traditional and eco-friendly material, is applied in the works. Lacquer is a traditional material that shows off many superiorities including traditional values, strong adhesion and durability, in addition, it is appropriate to a surface finishing material of metallic formation works using aluminum due to its luxurious sensation in terms of color representation and brilliance.
Hardening with heating methods such as kilns or gas torches are typically required in order to stain a metallic material with a Otchill. In other words, a Otchill can be stained on the metal surface by maintaining a specific high temperature and the film formation is affected by environment of heat hardening and surface texture. To identify the impacts of both heat hardening environment by a lacquer and surface texture of aluminum on the film formation in a lacquer, experiments were conducted by altering the heating time and temperature under the environment of heat hardening. The experiments were conducted by dividing into 4 states, including a refined plate with surface texture of aluminum, a ground state by the #320 sandpaper, a state by sandblast processing and a hammer texture. The specimens, which are in line with film formation degrees according to the 4 different surface textures of aluminum as well as the time and temperature for hardening, were fabricated. With these specimens fabricated, the experiment results on adhesion and strength according to the aluminum surface and high temperature hardening environment for a Otchill were derived through a strength experiment of a pencil and crosscut experiment. The film with a higher adhesion was formed with the specific heating temperature rather than the heating time among environmental factors for heat hardening of a Otchill. In addition, it was confirmed that a surface texture showing a brilliance had less adhesion than sandpaper grinding or hammering texture and the surface texture of sandblast processing exhibited the highest adhesion. It was possible to identify through the experiments that strength and adhesion of a lacquer varied according to the heat hardening environment of a Otchill and surface status of aluminum.
It is anticipated that applying a Otchill on various aluminum plate moldings will not only increase the aesthetic impression of a plate molding work of aluminum but also heighten its value because it has advantages of weight lightening of metallic works, a diversity of color representation and the ornamental and high value-added surface treatment.