Abstract: An opening portion that is formed so as to pass-through an opening/closing plate portion of a gate, can be disposed at a region overlapping a lower end opening of a hopper. The opening portion is structured by a first pass-through portion, and a second pass-through portion that is formed so as to be continuous with the first pass-through portion. A width, in a direction orthogonal to a lined-up direction in which the first pass-through portion and the second pass-through portion are lined up, is narrower than the first pass-through portion. Further, a driving mechanism moves the gate such that the opening/closing plate portion moves in the lined-up direction as seen in a plan view. Based on a preset target value of weight of sand, a control section controls the driving mechanism so as to decrease an amount of overlap of the opening portion of the gate and the lower end opening of the hopper in a stepwise manner in accordance with an increase in the weight of the sand measured by a scale.

Abstract: When molding surfaces (50A) of a pair of dies (50) are to be cleaned by air-blowing, air is blown towards the molding surfaces (50A) from blowing nozzles (22A) of a cleaning blowing function portion (22) while a moving body (16) is reciprocatingly moved by driving force of a driving mechanism (18). When a parting agent is to be applied to the molding surfaces (50A) of the pair of dies (50), the mold release agent is jetted out towards the molding surfaces (50A) from spraying nozzles (24A) of a parting agent application function portion (24) while the moving body (16) is reciprocatingly moved by the driving force of the driving mechanism (18). In both of these situations, at the same time as the treatment of the molding surfaces (50A), a cleaning brush (32) reciprocatingly moves together with the moving body (16) and sweeps a device floor surface (12).

Abstract: An opening portion (34) that is formed so as to pass-through an opening/closing plate portion (32) of a gate (30), can be disposed at a region overlapping a lower end opening (24A) of a hopper (20). The opening portion (34) is structured by a first pass-through portion (34A), and a second pass-through portion (34B) that is formed so as to be continuous with the first pass-through portion (34A). A width, in a direction orthogonal to a lined-up direction in which the first pass-through portion (34A) and the second pass-through portion (34B) are lined up, is narrower than the first pass-through portion (34A). Further, a driving mechanism (40) moves the gate (30) such that the opening/closing plate portion (32) moves in the lined-up direction as seen in a plan view.

Abstract: A sand-blowing apparatus for a molding machine having a sand-storing tank for storing foundry sand disposed so as to be movable vertically and having an opening in an upper part of the sand-storing tank for supplying sand thereto, a nozzle in a bottom part of the sand-storing tank, a chamber in a central part of the sand-storing tank, and an exhaust valve that communicates with the chamber, a compressed air tank for storing compressed air that is movable vertically located above the sand-storing tank, and having an opening in a bottom part of the compressed air tank for blowing compressed air, a device for moving the compressed air tank toward and away from the sand-storing tank, a valve for controlling the opening and closing of the opening in the bottom part of the compressed air tank, a piston rod connected to said valve that passes through an upper part of the compressed air tank, and a device for raising and lowering the piston rod to thereby open and close the valve, wherein when the compressed air tank

Abstract: A blow-squeeze molding apparatus equipped with a compact and cheap gas treating apparatus wherein the loss of pressure in the compressed air is small and the position at which sand is blown into the mold can be easily changed. The apparatus comprises a sand-storing tank equipped with a sand-discharging nozzle and an exhaust valve, a compressed air-storing tank equipped with a compressed air-discharging opening, and means for opening and closing the compressed air-discharging opening. The blow squeeze machine comprises a stationary member for fixing a stationary piece of mold (mold half) and a sliding member for sliding a movable piece of mold. The gas treating apparatus comprises a hood surrounding the shell machine, means for treating gases with a smell, and a guide tube for guiding gases with a smell.