Patent WO-2019004716-A1 (WO)
Title: Continuous automated manufacturing system dedicated to medium/large-sized sand mold
Inventor: LEE JUNG SU
IPC: B22C21/12
Filed: 2018-06-27
Abstract: The present invention relates to a continuous automated manufacturing system dedicated to a medium/large-sized sand mold, wherein, in connection with manufacturing a medium/large-sized sand mold having a width of 1200mm or larger, in particular, among sand molds made by densely compacting molding sand, faster, simple, and continuous automated production is possible, thereby making a large contribution to quality improvement, including productivity of sand molds following medium/large-sized specifications, and not only cycle time for article production is substantially shortened, but poor working environments of workers resulting from scattering dust can also be improved. The system comprises: a flask supply portion (100) for successively supplying upper and lower flasks (1, 2) to a sand mold shaping portion (300) one after the other, the upper and lower flasks constituting one set and satisfying medium-sized or large-sized specifications, the sand mold shaping portion (300) comprising an upper shaping portion (310) and a lower shaping portion (360); a flask moving portion (200) having a pair of rails (210) fixedly installed thereon such that the same can reciprocate in a predetermined range while the upper and lower flasks (1, 2) transferred from the flask supply portion (100) are successively seated thereon, moving shuttle blocks (220, 230) being provided on the upper ends of the rails (210) such that the upper and lower flasks (1, 2) can be moved for a subsequent process, one or more moving rollers (221, 231) being integrally mounted on the moving shuttle blocks (220, 230), and shock absorbers (240) being installed on both ends of the rails (210), respectively, so as to buffer shocks that occur during movements of the moving shuttle blocks (220, 230); a sand mold shaping portion (300) comprising an upper shaping portion (310) and a lower shaping portion (360) fixedly installed on the upper ends of the moving shuttle blocks (220, 230) of the flask moving portion (200), respectively, such that, when the interior of the upper flask (1) or the lower flask (2) is filled with molding sand by a molding sand supply portion (400), vibrations are transferred to the interiors of the upper and lower flasks (1, 2) through rotating vibrators (323, 373), thereby forming a sand mold in a robust and solid manner, and the upper and lower flasks (1, 2) are then transferred to a flask rotating portion (600) by driving roller chains (312, 362), respectively; a molding sand supply portion (400) for successively supplying molding sand to the interiors of the upper and lower flasks (1, 2) that have been transferred to the sand mold shaping portion (300) such that every corner of the upper and lower flasks is evenly filled with molding sand by a turbine-type impeller (430); a sand mold pressurizing portion (500) for successively applying pressures to the interiors of the upper and lower flasks (1, 2), after the interiors of the upper and lower flasks (1, 2) are successively filled with molding sand, such that a sand mold is formed in a robust and solid manner; a flask rotating portion (600) for rotating the upper flask (1) that has been filled with molding sand by the molding sand supply portion (400); and a control portion (800) having a microcomputer embedded therein, which can control various devices by a program, the control portion (800) receiving information regarding all operations of the flask supply portion (100), the flask moving portion (200), the sand mold shaping portion (300), the molding sand supply portion (400), the sand mold pressurizing portion (500), and the flask rotating portion (600) through a sensor (700) and controlling the same accordingly.