Manufacturing Method of Four Side Curved Type Window Glass for Mobile Device

摘要

The window glass manufacturing method of the present invention includes a lower mold forming a lower portion of a mold in the same shape as that of a curved glass loaded with flat glass loaded, and a mold device composed of upper molds having different shapes at each manufacturing step to realize stepwise shape. Using the glass forming apparatus to make the flat glass into the curved glass, the flat glass manufacturing step of manufacturing the flat glass in a predetermined shape and size; A flat glass loading step of loading the flat glass on the lower mold; A lower mold moving step of moving the flat glass loaded into the lower mold to preheat the lower mold; The preheating upper mold, which forms the slope alignment and the primary form (free form) due to the glass expansion, is loaded into the lower mold, and then preheated to a predetermined temperature in a preheating section where the upper heater and lower heater for preheating are installed, and then preheated. A flat glass preheating step of unloading the upper mold; After forming the upper mold into the lower mold, pressing the upper mold for maintaining the molding temperature and the lower heater installed to complete the final shape to form a curved glass shape, and then forming the curved upper mold to unload the upper mold. Step and; In order to cool the temperature constantly, a cooling glass cooling step for controlling the cooling speed includes a curved glass cooling step of cooling the curved glass to a predetermined temperature for a certain period of time, and the curved glass includes 4 of the vertical parts in addition to the horizontal surface. A horizontal part which is displayed on the surface and the bent part and is touched and is perpendicular to the slope, and forms a horizontal surface; A vertical portion formed of four surfaces having a 90-degree angle to the horizontal portion and forming a vertical plane; Four corner curves that combine the horizontal part and the vertical part and form a straight curved surface with a constant radius of curvature, and the left and right curved surfaces and the upper and lower curved surfaces, and the left and right curved surfaces and the upper and lower curved surfaces meet each other to form a curved surface. It consists of a curved portion made of. According to the method for manufacturing a sloped curved window glass for a mobile device of the present invention, the glass expansion in the preheating step is solved by the slope alignment and the primary molding, and the final shape is realized in the forming step, thereby improving the accuracy of the shape, thereby improving yield It has the effect of reducing the manufacturing cost by improving.