Patent GB-190801581-A (GB)
Title: Improvements in or relating to Glass Blowing Machines for Blowing Hollow Objects especially Glass Bottles Jars or the like in Moulds.
Inventor: ROHRBACH AUGUST
Filed: 1908-01-23
Granted: 1909-01-25
Abstract: 1581. Rohrbach, A. Jan. 23. Blowing.-A machine for blowing glass bottles and other hollow objects has a number of head moulds and parison moulds arranged on supports rotatable in vertical planes, and a number of finishing-moulds arranged on a table rotatable in an horizontal plane, the moulds being opened and closed independently by means of compressed air. The table 6 may be adjusted vertically and fixed at any desired height to the central vertical column 2. This column is hollow, being closed at each end, and is supported by ball bearings 5 on a pedestal 1. A cross-head 10 mounted on the upper part of the column carries rotatable supports 11, to the outer faces of each of which are fixed the two parts of the parison mould 13 and the two parts of the head mould 14. There is also secured to each support a nozzle device 15 carrying a mandrel through which passes the air for blowing the bottle. Compressed air from a pipe 16 passes through a pipe 17 to the blowing-nozzle, and through pipes 21 to cylinders 23 which operate the finishing-moulds 65. These moulds are made in halves, each half mould being hinged to an horizontal pivot 66. The half moulds are connected by links to a pistonrod 70 operated by the cylinder 23 so that, when air is admitted below the piston 71, the rod is forced upwards and the moulds are closed. The air for blowing a bottle is controlled by a handvalve 25, and passes through a central passage 27 of the screwed portion 28 of a spindle 29, Fig. 3. The spindle carries an air nozzle 30, which constitutes the core or mandrel for forming the opening in the neck ot the bottle. When it is desired to form bottle necks with an internal screwthread, the nozzle is formed with a thread of the desired shape. Thus, by turning the spindle 29, the nozzle may be forced into the molten glass in the head mould 14 so as to form the bottle neck with au internal screw. Each half of the parison mould 13 carries a toothed quadrant 34 and is pivoted to a pin 33. One quadrant gears with a rack 36, which forms part of a double-ended piston 37 moving in a double cylinder 38, as shown in Fig. 6. The other quadrant gears with a similar sector moving in a cylinder 39. Similarly, each half of the head mould 14 has a quadrant which engages with racks which move in cylinders 40, 41 respectively. Air passes to the ends of these cylinders from the pipes 17 through pipes 44 and two-way valves 43, 45. The handles governing these valves are coupled by a link, and are so arranged that the halves of the head mould close before the halves of the parison mould, and opening takes place in the reverse order. The halves of the parison mould may also be opened while the head mould remains closed. Similar means may be provided to rotate the vertical supports 11, or these supports may be rotated by band. In use, the support 11 is turned so that the parison mould is upwards and the head mould and parison moulds are closed. Molten glass is poured into the open end of the parison mould and air is admitted to the blowing-nozzle so as to blow the glass into a ball. The air supply is cut off, the parison mould is opened, and the support 11 is reversed so that the ball hangs from the head mould. Air is then admitted to the cylinder 23 to close the finishing- mould on the head mould, and a further supply of air is admitted to the nozzle to complete the blowing operation. The bottom of the finishing-mould may be mounted on a spring so that the bottom part of the ball rests against this spring bottom and depresses it during the final blowing.