| 摘要 |
The molding machine comprises a station ( 1 ) with a chamber ( 2 ) that is closed between a front plate ( 5 ) that can move and swivel and a rear plate ( 8 ) associated to an extraction piston ( 9 ), forming a shell ( 3 ) in said chamber ( 2 ) by blowing sand through an upper hopper ( 4 ). The shell ( 3 ) obtained is pushed by the piston ( 9 ) until the rear of a row of shells ( 3 ') placed on a conveyor ( 7 ) that places them opposite a casting station. The motion of the shell ( 3 ) pushed by the extraction piston ( 9 ) is independent of the motion of said piston after being incorporated in the row of shells, and is provided exclusively by the conveyor system ( 7 ), thereby providing a shorter working cycle while preventing deterioration of the shells as they are not compressed by the piston ( 9 ) when it pushes against the rear of the row of shells ( 3' ). |
