Patent GB-198485-A (GB)
Title: Improvements in and relating to glass blowing machines
IPC: C03B9/14
Filed: 1922-03-21
Abstract: 198,485. Morrison, W. D. March 21, 1922. Blowing; delivering molten metal. - A glassblowing machine comprises a number of moulds arranged in sets radially on a rotating table, a superposed feeding-table intermittently rotated and provided with receiving pockets disposed radially in sets, and means fitted to the feeding- table for delivering molten glass at predetermined times to receiving cups disposed in a radial casing which is adapted to deliver the charges of glass to the parison moulds. Feeding-device. The melting tank has a forehearth I, Figs. 2 and 6, which is provided on its underside with delivery orifices 3 arranged in line. A table 5, which is rotated intermittently, has receiving-cups 4 arranged in sets radially, so that a set registers with the orifices 3 in the forehearth at each stoppage of the table 5. Each set of the cups 4 is carried by a sliding bar 7, and as the cups are filled with the molten glass, the bar is moved outwards by an air cylinder 9 thus shearing off the contained charges and closing the outlets of the orifices 3. After the shearing, the table is rotated one step and cups 10, which close the bottoms of the cups 4, are opened to discharge the charges of glass into intermediate receiving- cups 12. The table 5 can be adjusted vertically in order to bring it close against the underside of the foreheath. Passages 6, through which water circulates, are arranged around the orifices 3 in the forehearth to regulate their temperature. The receiving-cups 12 are formed in a casing 59 which swings about the central column 2 of the forming machine and is carried forwards by a trip bar 64 mounted on the mould table 65 of the forming machine. During this movement, doors 60 which close the bottoms of the pockets 12 are opened to discharge the charges of glass into the parison moulds. The bar 64 is raised by a cam 66, and after the cups 12 have discharged, the bar is allowed to fall and the casing 59 is returned to its normal position by a counterweight. Blowing-machine. The mould table 65 is rotated continuously about the central standard 2 and is made hollow to provide chambers 95, 96. These chambers allow communication between the moulds and chambers 91, 92 formed in the interior of the standard 2 and connected with suction and pressure devices respectively. Ports 93, 94 connect the chambers 95, 96 with the chambers 91, 92 at appropriate times. The table 65 carries pairs of parison moulds 84 and finishing moulds 88, the moulds of each pair being arranged radially with respect to one another and provided with a number of moulding spaces. The ring moulds are carried by a sliding plate 89 which is moved radially from one mould to the other by means of a roller 116 which engages a cam. Thus the parisons are formed, and the finished bottles are blown, neck downwards, and there is no reversal of the parisons when transferring them to the finishing moulds. The open ends of the moulds are covered by plates 108, pivoted on brackets 109 carried by the moulds, and opened and closed by a cam 111. Openings are formed in the plates 108 over the parison moulds and these openings are closed, after the moulds are charged, by sliding bars 113. Operation. After the parison moulds have been charged by the feeding-device, the open ends of the moulds are closed and plungers 102 are moved upwards into the ring moulds by the cam 66, and suction is applied to pack the glass into the moulds. The plungers are next withdrawn by springs 115 and compressed air is admitted to blow the parisons. The moulds are then opened and the ring mould plate 89 slides outwards to transfer the parisons to the finishing moulds. After the final blowing, the moulds are again opened, and the ring mould plate is inverted by bevel gearing and then opened to discharge the bottles.