Patent GB-192347-A (GB)
Title: Improvements in glass forming machines
IPC: C03B9/18
Filed: 1922-03-16
Abstract: 192,347. Owens Bottle Co., (Assignees of La France, R.). Jan. 30, 1922, [Convention date]. Blowing.-A glassware-forming machine of the turnover type in which a continuously rotatable carriage carries a series of parison moulds and finishing moulds has devices individual to each parison mould for closing the charging opening in the top thereof, means for inverting the parison moulds before they are opened to release the parisons, and means for reinverting the parison moulds independently of the ring moulds. Construction and operation. - The carriage supporting the moulds consists of a lower section or spider 35, Fig. 1, an intermediate section 37, and an upper section 38 all adjustable vertically in respect to one another and rotatable about a central column 33. A number of mould units are arranged symmetrically around the carriage and each comprises a parison mould 60, a ring mould 61, a finishing mould 62, and a plate 67 which slides radially and supports a funnel-shaped guide 66. As each mould unit is brought to the chargmg position, a charge of molten glass, preferably supplied by an automatic feeder, is dropped into the funnel and is guided by it into the open end of the parison mould 60. Immediately after the mould receives its charge, the plate 67 is moved radially outward and brings a closing-head 69 over the mould. Compressed air from a distributor 199 is admitted to a cylinder 77 which closes the head 69 on to the mould. The closing of the head may open a valve to admit air above the glass to pack it down into the mould. Alternatively, the packing of the glass may be accomplished by connecting the ring mould with a vacuum tank. Air is also applied to a cylinder 129, Fig. 15, to project the plunger 127 into the ring mould, the plunger being lowered, after the supply of air to the cylinder 129 is cut off, by a constant pressure of air maintained on a narrow annular portion of the upper part of the piston 128. As soon as the plunger is lowered, air is admitted around the plunger to blow the glass to fill the parison mould, the blowhead 69 being removed after the parison is blown. The parison mould, ring mould, and associated parts are mounted on a horizontal axis, and after the parison is blown, they are swung downwards from the position shown in Fig. 1 by means of segmental gears 132 operated by a cam 125. A cam 141 then opens the parison mould which is swung into the upward position again, thus leaving the parison suspended from the ring mould. The sections of the finishing mould 62, Fig. 1, which are pivoted on a sleeve 155, are closed about the parison by a cam 166, the mould bottom 211 being raised into position by a cam 212. The mould bottom is carried by a pivoted bracket 214 and after the bottle is blown and the mould again opened, the bracket is tilted outwards to discharge the bottle. Cooling moulds.-Air for cooling the moulds. supplied from a hollow casting 177 at the base of the machine, is conducted through channels 179 and ports 180 to nozzles 182 by which the air blasts are directed against the mould bottoms 211. The channels 179 also communicate with the hollow sleeves 155 which have ports opening into the hollow arms 154 of the finishing moulds. whence the air blast passes through slots against the moulds. Other pipes direct air against the parison moulds. A damper 187 controls the air supply of the ports 180 and a sliding plate 190 controls the supply to the sleeve 155.