Automatic vibration molding machine for green sand mold

An automatic vibration molding machine for green sand mold comprising;

• a plurality of vibration proof springs 5 fixed onto a base 4 which is fixed to a floor,
• a lower frame 3 set and fixed on the vibration proof springs 5,
• ascent and descent cylinder means 25 with a lock mechanism fixed to the lower frame 3,
• an ascent and descent table 23 setting thereon a flask b filled with green sand therein and constructed to go up and down between an upward pressing and forming position and a downward predetermined position,
• an upper frame 1 disposed via an intermediate frame 2 positioned standingly on the lower frame 3,
• a vibration head 11 having at least one vibration motor to for vibrating a pressure plate 13 via pressure air spring means 12 expansible and contractible in up and down directions, said vibration head being suspended from the upper frame 1 via a head-ascent and descent frame 17, and
• ascent and descent means 14 for ascending and descending the vibration head 11 to ascend and descend the pressure plate 13 between an upmost position for separating the pressure plate 13 from the flask b by contracting the pressure air spring means 12 and a descent position for expanding the pressure air spring means 12 to press the green sand,
• whereby the green sand of the flask b may be compressed and formed by the pressure force of expansion of the pressure air spring means 12 and the vibration force of the vibration motor 10 mounted on the vibration head 11, as well as the vibration which is propagated to a pattern c from the upper frame 1 via the lower frame 3, the ascent and descent cylinder 25, and the ascent and descent table 23.