| 摘要 |
PURPOSE:To prevent sand from leakage in time of projecting a casting as well as to reduce the occurrence of dust in and around a shot blast unit, by tilting upward a sand check plate being tiltably installed in position beneath an end part at the doorway side of an apron conveyor. CONSTITUTION:In time of casting projection onto an apron conveyor 4 inside a shot projection chamber 2, a sand check plate 10 is tilted upward by extension operation by a cylinder 14, while sand to fall plumb down with the turnover of a plate 6 at a turnover part of an end part at the doorway side of the apron conveyor 10 is received by this uptilted sand check plate 10, making the sand slidingly drop on a bottom plate 2a of the shot projection chamber 2, and any leakage of the sand from an opening lower end part 3a of a casting doorway 3 is kept back with the sand check plate 10. Next, when casting projection is over, the sand check plate 10 is tilted downward by contraction of the cylinder 14 and made to remain on standby there. Under this condition, a door is made to go down, closing the doorway 3 as well as rolling and stirring castings by the conveyor 4 and, aftersand dropping takes place with shot projection, the doorway 3 is opened, using the sand check plate 10 as a chute, whereby these castings are discharged onto the vibrating conveyor 20. |
