Patent GB-257641-A (GB)
Title: Improvements in and relating to machines for making bottles or other articles of glass
IPC: C03B9/22
Filed: 1925-04-06
Abstract: 257,641. McNish, A., and Automatic Bottle Machine Corporation, Ltd. April 6, 1925. Blowing; gathering.-A blowing.machine of the suction-gathering type comprises a horizontal rotary mould-supporting table which is movable vertically to enable a parison mould to gather a charge of glass, the rotation of the table being stopped while a gather is being made. The machine comprises a wheeled truck 20 on which a vertical cylinder 21 is adjustably mounted, the piston 25 carrying a column 26 on which a mould table 27 is rotatably mounted. The upper end of the cylinder carries a crosshead 28 which passes through slots in the piston column 26 and is rigidly secured to an inner column 29. A clutch element 30, secured to the table 27, rotates on the column 26, and the other element 31 of the clutch is rotatably mounted on the column 29. The table 27 carries three parison moulds 43, and corresponding finishing-moulds 44, and when in the lowermost position, shown in Fig. 1, one of the parison moulds dips into the glass in an open trough or hearth, such as that described in Specification 244,834, and gathers a charge by suction. When air is admitted below the piston 25, the table 27 is lifted and lifts the mould away from the supply of glass. At the same time, the clutch members 30, 31 are engaged and rotation of the member 31, by an air cylinder 42, rotates the table 27 and brings a new mould to the gathering-position. A wiping-arm 54, pivoted below the table 27 and operated by a cylinder 57, removes sulplus glass from the bottom of the parison mould as it is lifted after making a gather. The parison and finishing moulds are pivoted on the table 27 and they are opened and closed by a cam 38 fixed to the column 26. Resilient connections between the moulds and their operating gear prevent damage in the event of an obstruction. The moulds are arranged alternately, and a parison is transferred from a parison mould to its corresponding finishing mould by means of the ring mould 79, which is carried by a swinging arm 48. This arm is pivoted to the table and is operated by a cam 39 also fixed to the column 26. A ring mould is opened, as it swings over the finishing mould, by a pin 49 depending from a ring 50 carried by the table, and is closed, as it swings over the parison mould, by a pin 52 depending from the cylinder 42. The fixed column 29 also carries brackets 40 which support a cylinder 41. This cylinder operates the means for actuating the plunger 80 that forms the initial opening in the parison. The plunger 80 slides through the upper part of the ring mould, and is surrounded by a spring 83 which normally holds it retracted from the moulding surface of the ring mould. It is forced downwards, when a gather is being made, by a plunger 82 which is carried by a crosshead 84, Fig. 4, fixed to tubular members 86 that slide in guides 87 carried by the brackets 40. The upper ends of the tubes 86 are connected by a crosshead 90 which is connected to the rod of a piston 92 on the cylinder 41. The cylinder has a depending arm 94 carrying a roller 95 which rests on the ring 50. By this construction, the cylinder is raised or lowered as the table 27 rises or falls, and when air is admitted above the piston 92, the crosshead 84 is forced downwards and the plug 80 is thrust downwards into position to form the mouth of the bottle. At the same time, extensions of the tubes 86 make connection with short tubes 93 mounted on the halves of the parison mould and connected with the interior of the mould. The crosshead is connected with a source of vacuum so that suction is applied through the tubes 86 to the interior of the mould to gather a charge of glass. A blowhead 197, for supplying air from blowing the parison, is carried by the clutch 31, and the head fits on to a finishing mould when the latter is raised by the lifting of the table 27. Blowing takes place while the mould is travelling, in its elevated position, from one position of rest to the next. Valves are provided for controlling the supply of air to the different operating-cylinders, and these valves are actuated by the piston of the rotation cylinder 42.