Patent GB-983592-A (GB)
Title: Improvements in or relating to a glassware forming machine
IPC: C03B9/193
Filed: 1962-05-11
Abstract: <PICT:0983592/C1/1> <PICT:0983592/C1/2> A glassware forming machine comprises a first station A with press moulds 46 for forming two parisons, a second, forwardly spaced station B having blow moulds 78 for forming finished glassware and a first and a second separable ring unit 66a and 66b each of which carries a pair of parisons from station A to station B along a generally horizontal path and thereafter moves upwardly, rearwardly and downwardly to interchange with the other unit, and means for opening and closing the separable ring units.  The operation of the machine is timed by spaced dogs 36 on a rotating drum 32 which engage valves in a <PICT:0983592/C1/3> <PICT:0983592/C1/4> valve bank 302 receiving air from a pressurized source S and thereby operates various control valves in the machine. At the beginning of a cycle the conduit 304 is vented to operate the fluid motor 64 via a two-way control valve 306 and bring the glass feeder shoot sections 54 into position over the press moulds 46 at the station A.  Line 328 is vented to operate the neck ring opening cylinder 142 and thereby close the neck ring unit 66a by means of springs 140. At the same time air cylinder 178 is operated to push the arm 174 and operate the rack-and-pinion mechanism 158, 166, 168 to tilt the plate 138 about the shaft 172 and raise the neck ring unit 66a.  Line 314 is then vented to operate a fluid motor 162 via a two-way control valve 316 thereby retracting the neck ring unit to the station A, passing over the neck ring unit 66b and being lowered when the air in cylinder 178 is exhausted.  Meanwhile, the blow moulds at station B are closed by raising the bottom plates 76 in two stages by venting conduits 332, 334 thereby operating air cylinders 204, 206 and venting lines 336, 340 to bring together blow mould halves 74a and 74b by means of control valve 338 and air cylinder 200.  The neck ring unit 66b carrying parisons P by means of engagement with the thread 126 formed during pressing is then lowered on to the blow moulds by venting line 350 to air cylinder 180 and the blow head 80 is lowered to insert the blow nozzles 84 through the necking unit 66b by actuation of two-way spring-biased control valve 378 which supplies air to the blow head cylinder 82.  At the same time a valve 380 is opened to supply air under pressure to the nozzles 84 and blow the parisons into final shape.  The blow moulds are cooled at the same time by means of air directed through passages in the blow mould arms 114 and through hollow posts 195 in the machine table 22.  Meanwhile the double press mould carrier 28 is elevated to the neck ring unit 66a by means of a control valve 354 to receive the press head 38 and the anvils 102 for supporting the press moulds against the pressure of the press head are spring-biased into position by means of air cylinders 108 actuated by air pressure <PICT:0983592/C1/5> from the conduit 360.  The press head 38 is lowered to press parisons in the glass charges by venting a conduit 362 which, if the anvils are set up operates a valve 112, venting a conduit 364 which if the neck ring unit 66a is down in position operates a further valve 188 to vent a conduit 366 which operates a spring-biased control valve 368 and a further conduit 370 to finally operate the press head cylinders 40.  The press moulds are cooled at the same time by air flow from the blow mould support arms 114.  The blow head and the press head are depressed together and remain in position for about the same length of time.  The blow head is retracted and the blow mould opened by venting the conduits 376, 336 so as to reverse the control valves 378, 338 and the neck ring unit 66b is opened by pressurizing cylinder 142, releasing the glassware to rest on the plates 76.  Air is supplied to the tilt cylinder 178 via line 330 to elevate ring unit 66b and to the cylinder 204, lowering the plates 76 carrying glassware W.  The cylinder 220 is then actuated to operate the take-out mechanism 88, the gripper heads 218 engage the top of the glassware W, the pressure in cylinder 206 is released to further lower the plates 76 so as to clear the glassware and pressure is provided in the take-out cylinder 220 to thrust the take-out mechanism over the conveyer 90, when the glassware is released. At the same time the press head 38 is retracted by operating the control valve 368 and the press mould carrier 28 is lowered from the parisons which are hanging from the neck ring unit 66a by actuating the air cylinders 108 to remove the anvils 102 and the control valve 354 to operate the press mould elevating cylinder 30.  The neck ring unit 66a is then transferred from station A to station B by operating slide cylinder 162 by the valve 316 and the cylinder 180 is also operated so that the neck ring unit 66a is slightly raised to clear the tops of the blow moulds. The glass feeder shoot sections are meanwhile swung into operative position by actuation of the cylinder 64, completing one cycle of operations.