Patent GB-908162-A (GB)
Title: Improvements in and relating to the treatment of molten glass
IPC: C03B9/193
Filed: 1960-10-05
Abstract: 908,162. Glass pressing machines. OWENS-ILLINOIS GLASS CO. Oct. 5, 1960 [Oct.  8, 1959], No. 34078/60. Class 56. Apparatus for moulding a blowable parison or a finished article comprises a gob guide and a pressing plunger movable alternatively into vertical alignment with the mould for charging the mould and then pressing the charge. In the machine shown in Fig. 1, glass feeder 10 with reciprocating plunger 11 and shear 12 forms gobs 39 which are fed through inclined guides 41 with curved sections 40, 42 to vertical guides 43 within the machine. During feeding, the pressing plungers 32 are moved aside and replaced by movable guide sections (not shown) to feed the gobs through neck moulds 23 carried in a turret 22, into the moulds 24. The moulds 24 are moved up by an hydraulic cylinder 29, the plungers moved back into alignment with the moulds and then downwards into the moulds. Plungers and moulds 24 are then retracted leaving the shaped parisons suspended from the neck moulds. The turret 22 rotates to bring the parisons into split finishing moulds 34 and, after blowing, the ware is placed on a belt conveyer 38.  The mechanism for operating the plungers 32 is shown in section in Fig. 4 and inverted plan in Fig. 11. Each plunger is mounted on a slide 50 carried in a guide 33 secured to the bottom end of a sleeve 46 slidable in a ball bushing 49, the sleeve and bushing being concentric with the gob guide 43. Each guide 33 is vertically movable by pistons 51 and 52 (not shown in Fig. 4). They are independently movable to allow the plungers 32 to seat separately during pressing but the slides 50 are interconnected by keys and slots 68, 69, 70, 71 (Fig. 11), for simultaneous sliding movement produced by a crank-pin on a shaft 105 engaging a slot 102 in one of the interconnected arms 74, 75 secured to the slides. When the plungers are moved aside for feeding, gob guides 90, carried on a member 93 are moved into alignment with the guides 43 by a crank 95, on a shaft 97, engaging a slot 94. The shafts 97 and 105 are interconnected by racks and pinions at their upper ends and rotation of both is produced by piston operated racks 108, 109, Fig. 15, driving the pinion 110 which has splined connection with the shaft 105 to permit its vertical movement with the plungers 32. Cooling fluid is supplied to the plungers 32 through a conduit 76, Fig. 4, connecting with the bore 55 of the piston 57 through the upper end 77 whence it is fed through interconnecting passages in the guides 33 and slides 50 through the plungers and finally exhausted through conduits 57, 58 which telescope to allow vertical movement of the plungers. The hydraulic system for producing the movement of the parts of the system in timed sequence is shown diagrammatically in Fig. 15. The upper part of the apparatus contains a cam drum driven by a motor synchronized with that which operates the glass feeder. Two of the cams, 145 and 145a, are shown. Initially, the cam 145 operates the valve 157 to feed fluid to operate rack 108 and the shaft 105 to align the plungers 32 with the moulds. Fluid from the rack 109 is exhausted through a conduit 171, the valve 128 and conduits 172, 173. When the rack 108 has completed its movement, pressure is applied through the conduit 144 to a valve 137 to permit fluid from the main supply conduit 141 to flow into a conduit 143, past the relieved part 134 of valve 128, through pressure regulators 179, 180, to above the pistons 51, 52 to depress the plungers 32 while fluid is exhausted from below the pistons through needle valve 187, a conduit 183, a relieved part of valve 137 and a needle valve 189. Downward movement of the pistons and of the shaft 105 permits pivoting movement of the arm 175, one end of which bears on one end of the shaft while its other end is coupled to the valve 128 urged upwardly by fluid from the conduit 190 acting on a pin 131 in a chamber 132. This movement disconnects the conduit 171 from the conduits 172, 173. With the pressing operation completed a cam 145a shifts the valve 157 to exhaust from the conduit 170 and apply pressure to 173 to shift the valve 137 to exhaust from 144 and supply pressure to the undersides of pistons 51, 52 through conduit 183. Completion of the upward movement of the pistons and of the shaft 105 lowers the valve 128 to supply fluid from the conduit 172, through the relieved portion 133 and the conduit 171 to the rack 107 to turn the shaft 105 to move the plungers 32 and gob guides 90 to the gob feeding position.