Patent GB-318134-A (GB)
Title: Improvements relating to rotary glass blowing machines
IPC: C03B9/24
Filed: 1929-06-20
Abstract: 318,134. Bullman Machine Co., Ltd., (Assignees of Hillmann, H.). Aug. 28, 1928, [Convention date]. Blowing.-Relates to rotary glass-blowing machines of the kind in which each parison mould consists of two parts carried by arms adapted to swing laterally about a vertical hinge pin. According to the invention, the arms carrying a parison mould are disposed centrally between two vertical guide bars which are disposed one behind the other in a direction radial to the vertical axis of the machine. The mould is opened by a cam and closed by a spring, and the movement of the cam is transmitted to the mould by means of a vertical rotatable shaft which influences the spring. Auxiliary closing devices are provided for exerting a closing-pressure on the halves of the mould, and the arms are used for conveying air for cooling the mould. The machine shown is of the type in which charges of glass are gathered by suction into parison moulds 3, Fig. 1. The base of the machine is an annular frame 4 on which a base ring 8 rotates. The ring supports the moulds and their operating mechanism by means of a number of vertical frames consisting of pairs of vertical bars 11, 12. Each frame acts as guide for a slide 17 which supports a parison mould, the slide being moved downwards as the mould passes over a forehearth 2. Parison mould, construction and mounting.- The slide 17, Figs. 1 and 3, consists of a rectangular frame 69, 76 which slides in slots 67, 75, between the bars 11, 12, respectively, and is attached to a rod 85 which is moved vertically by means of a cam 307 formed on the frame 4. The rod is in two parts screwed into one another, and the lower part may be rotated through chain and sprocket wheels in order to adjust the height of the mould 3. The halves 89, 90, of the parison mould 3 are carried by bent levers 87, 88, Fig. 3, respectively, which are pivoted on a part 84 of the rod 85 that extends into the slide 17. Each mould half has a perforated lug 98, Figs. 3 and 6, which engages a pin 97 carried by a rod 95 adjustably connected to a mould arm 87 or 88 by means of a nut 94. A rim on the mould is also engaged by fingers 100 which are also adjustably connected to the mould arms. By turning nuts 94, 105, the halves of the mould can be adjusted in relation to the ring mould. Each of the levers 87, 88 has an extension 106, 107, respectively, which is connected to a link 109 pivoted to a cylindrical sleeve 111 enclosing a spring 114. The spring embraces a rod 78 rigidly secured to the slide 17 and having at its outer end a cap 113. A forked lever 116, which engages bolts 115 secured to the sleeve 111, is feathered on a vertical shaft 118, Fig. 1. The lower end of the shaft carries a lever arm 119 provided with a roller 120 that runs on a cam 121 secured to the inner side of the base 4. Thus, as the machine rotates, the shaft 118 is rocked and the arm 116 causes the sleeve 111 to move outwards and compress the spring 114. The outward movement closes the parison mould, and it is opened by the spring when the roller 120 runs off the cam 121. In order to ensure that the mould halves shall be closed correctly, a lever 122, Fig. 6, is secured to the lower part of each of the levers 87, 88 close to the pivot 84. The outer end of the lever is provided with a screw 125 which is screwed tightly against the wall of the mould and gives support to the lower part of the mould and assists in keeping the mould faces vertical. Pipes 131, supported by the levers 122, convey air to nozzles for cooling the mould. Specifications 315,347 and 318,138 are referred to.