Pneumatic solder ball machine

The utility model discloses a pneumatic solder ball machine which comprises a rack, a left cylinder block, a right cylinder block, an opening and closing mold cylinder, a guide rod, a fixed mold plate, a left mould, a right mould, a discharge spout, a pressure plate, a rotating hinge, a circulating water pipe, an opening and closing hinge, cylinder rod connection, triple pieces, an exchange valve and an opening and closing cylinder, wherein ejector rod holes are formed in the bottoms of hemispheric pits of the left mould and the right mould, and the surfaces of the moulds corresponding to the inner side of the cylinder block are connected with the ejector rod holes; ejector rods matched with the ejector rod holes are arranged at the positions corresponding to the ejector rod holes of the inner side of the cylinder block; a support beam is arranged on a rack under a table top, and the opening and closing cylinder is connected with the support beam through a support hinge; an operating box is arranged on the ra